diff options
Diffstat (limited to 'include')
80 files changed, 3239 insertions, 1619 deletions
diff --git a/include/mbgl/map/map.hpp b/include/mbgl/map/map.hpp index c5f90d99e1..5ba23a76dd 100644 --- a/include/mbgl/map/map.hpp +++ b/include/mbgl/map/map.hpp @@ -127,6 +127,14 @@ public: void setViewportMode(ViewportMode); ViewportMode getViewportMode() const; + // Projection mode + void setAxonometric(bool); + bool getAxonometric() const; + void setXSkew(double ySkew); + double getXSkew() const; + void setYSkew(double ySkew); + double getYSkew() const; + // Size void setSize(Size); Size getSize() const; diff --git a/include/mbgl/map/mode.hpp b/include/mbgl/map/mode.hpp index 05de2df22c..4ee289d855 100644 --- a/include/mbgl/map/mode.hpp +++ b/include/mbgl/map/mode.hpp @@ -11,16 +11,8 @@ using EnumType = uint32_t; enum class MapMode : EnumType { Continuous, // continually updating map - Still, // a once-off still image -}; - -// We can avoid redundant GL calls when it is known that the GL context is not -// being shared. In a shared GL context case, we need to make sure that the -// correct GL configurations are in use - they might have changed between render -// calls. -enum class GLContextMode : EnumType { - Unique, - Shared, + Static, // a once-off still image of an arbitrary viewport + Tile // a once-off still image of a single tile }; // We can choose to constrain the map both horizontally or vertically, or only diff --git a/include/mbgl/renderer/mode.hpp b/include/mbgl/renderer/mode.hpp new file mode 100644 index 0000000000..6ff42d8058 --- /dev/null +++ b/include/mbgl/renderer/mode.hpp @@ -0,0 +1,18 @@ +#pragma once + +#include <cstdint> + +namespace mbgl { + +using EnumType = uint32_t; + +// We can avoid redundant GL calls when it is known that the GL context is not +// being shared. In a shared GL context case, we need to make sure that the +// correct GL configurations are in use - they might have changed between render +// calls. +enum class GLContextMode : EnumType { + Unique, + Shared, +}; + +} // namespace mbgl diff --git a/include/mbgl/renderer/renderer.hpp b/include/mbgl/renderer/renderer.hpp index a60f3f6e4d..db28ee92fc 100644 --- a/include/mbgl/renderer/renderer.hpp +++ b/include/mbgl/renderer/renderer.hpp @@ -1,7 +1,7 @@ #pragma once -#include <mbgl/map/mode.hpp> #include <mbgl/renderer/query.hpp> +#include <mbgl/renderer/mode.hpp> #include <mbgl/annotation/annotation.hpp> #include <mbgl/util/geo.hpp> #include <mbgl/util/geo.hpp> diff --git a/include/mbgl/renderer/renderer_backend.hpp b/include/mbgl/renderer/renderer_backend.hpp index 295838c71b..b83c128169 100644 --- a/include/mbgl/renderer/renderer_backend.hpp +++ b/include/mbgl/renderer/renderer_backend.hpp @@ -41,7 +41,7 @@ protected: // Called with the name of an OpenGL extension that should be loaded. RendererBackend implementations // must call the API-specific version that obtains the function pointer for this function, // or a null pointer if unsupported/unavailable. - virtual gl::ProcAddress initializeExtension(const char*) = 0; + virtual gl::ProcAddress getExtensionFunctionPointer(const char*) = 0; // Called when the backend's GL context needs to be made active or inactive. These are called, // as a matched pair, exclusively through BackendScope, in two situations: diff --git a/include/mbgl/renderer/renderer_observer.hpp b/include/mbgl/renderer/renderer_observer.hpp new file mode 100644 index 0000000000..551b5c803e --- /dev/null +++ b/include/mbgl/renderer/renderer_observer.hpp @@ -0,0 +1,35 @@ +#pragma once + +#include <exception> + +namespace mbgl { + +class RendererObserver { +public: + virtual ~RendererObserver() = default; + + enum class RenderMode : uint32_t { + Partial, + Full + }; + + // Signals that a repaint is required + virtual void onInvalidate() {} + + // Resource failed to download / parse + virtual void onResourceError(std::exception_ptr) {} + + // First frame + virtual void onWillStartRenderingMap() {} + + // Start of frame, initial is the first frame for this map + virtual void onWillStartRenderingFrame() {} + + // End of frame, boolean flags that a repaint is required + virtual void onDidFinishRenderingFrame(RenderMode, bool) {} + + // Final frame + virtual void onDidFinishRenderingMap() {} +}; + +} // namespace mbgl diff --git a/include/mbgl/storage/offline.hpp b/include/mbgl/storage/offline.hpp index 117dd0591b..ef4a499e83 100644 --- a/include/mbgl/storage/offline.hpp +++ b/include/mbgl/storage/offline.hpp @@ -30,15 +30,15 @@ public: OfflineTilePyramidRegionDefinition(std::string, LatLngBounds, double, double, float); /* Private */ - std::vector<CanonicalTileID> tileCover(SourceType, uint16_t tileSize, const Range<uint8_t>& zoomRange) const; - uint64_t tileCount(SourceType, uint16_t tileSize, const Range<uint8_t>& zoomRange) const; + std::vector<CanonicalTileID> tileCover(style::SourceType, uint16_t tileSize, const Range<uint8_t>& zoomRange) const; + uint64_t tileCount(style::SourceType, uint16_t tileSize, const Range<uint8_t>& zoomRange) const; const std::string styleURL; const LatLngBounds bounds; const double minZoom; const double maxZoom; const float pixelRatio; private: - Range<uint8_t> coveringZoomRange(SourceType, uint16_t tileSize, const Range<uint8_t>& zoomRange) const; + Range<uint8_t> coveringZoomRange(style::SourceType, uint16_t tileSize, const Range<uint8_t>& zoomRange) const; }; /* diff --git a/include/mbgl/style/conversion.hpp b/include/mbgl/style/conversion.hpp index 27504a89b1..71c2cec237 100644 --- a/include/mbgl/style/conversion.hpp +++ b/include/mbgl/style/conversion.hpp @@ -1,6 +1,8 @@ #pragma once #include <mbgl/util/optional.hpp> +#include <mbgl/util/feature.hpp> +#include <mbgl/util/geojson.hpp> #include <string> @@ -9,9 +11,8 @@ namespace style { namespace conversion { /* - The `conversion` namespace defines conversions from a templated type `V` representing a JSON - object conforming to the schema defined by the Mapbox Style Specification, to the various C++ - types that form the C++ model of that domain: + The `conversion` namespace defines conversions from JSON structures conforming to the schema defined by + the Mapbox Style Specification, to the various C++ types that form the C++ model of that domain: * `std::unique_ptr<Source>` * `std::unique_ptr<Layer>` @@ -20,15 +21,31 @@ namespace conversion { A single template function serves as the public interface: - template <class T, class V> - optional<T> convert(const V& value, Error& error); + template <class T> + optional<T> convert(const Convertible& input, Error& error); Where `T` is one of the above types. If the conversion fails, the result is empty, and the error parameter includes diagnostic text suitable for presentation to a library user. Otherwise, a filled optional is returned. - The implementation of `convert` requires that the following are legal expressions for a value `v` - of type `const V&`: + `Convertible` is a type that encapsulates a special form of polymorphism over various underlying types that + can serve as input to the conversion algorithm. For instance, on macOS, we need to support + conversion from both RapidJSON types, and a JSON structure represented with `NSArray`/`NSDictionary`/etc. + On Qt, we need to support conversion from RapidJSON types and QVariant. + + We don't want to use traditional forms of polymorphism to accomplish this: + + * Compile time polymorphism using a template parameter for the actual value type leads to + excessive code bloat and long compile times. + * Runtime polymorphism using virtual methods requires extra heap allocation and ubiquitous + use of std::unique_ptr, unsuitable for this performance-sensitive code. + + Therefore, we're using a custom implementation of runtime polymorphism where we manually create and + dispatch through a table of function pointers (vtable), while keeping the storage for any of the possible + underlying types inline on the stack, using `std::aligned_storage`. + + For a given underlying type T, an explicit specialization of `ConversionTraits<T>` must be provided. This + specialization must provide the following static methods: * `isUndefined(v)` -- returns a boolean indication whether `v` is undefined or a JSON null @@ -48,21 +65,239 @@ namespace conversion { * `toNumber(v)` -- returns `optional<float>`, absence indicating `v` is not a JSON number * `toDouble(v)` -- returns `optional<double>`, absence indicating `v` is not a JSON number * `toString(v)` -- returns `optional<std::string>`, absence indicating `v` is not a JSON string - * `toValue(v)` -- returns `optional<mbgl::Value>`, a variant type, for generic conversion, + * `toValue(v)` -- returns `optional<Value>`, a variant type, for generic conversion, absence indicating `v` is not a boolean, number, or string. Numbers should be converted to unsigned integer, signed integer, or floating point, in descending preference. - The mbgl core implements these requirements for RapidJSON types, and the node bindings implement - them for v8 types. + In addition, the type T must be move-constructable. And finally, `Convertible::Storage`, a typedef for + `std::aligned_storage_t`, must be large enough to satisfy the memory requirements for any of the + possible underlying types. (A static assert will fail if this is not the case.) + + `Convertible` itself is movable, but not copyable. A moved-from `Convertible` is in an invalid state; + you must not do anything with it except let it go out of scope. */ struct Error { std::string message; }; +template <typename T> +class ConversionTraits; + +class Convertible { +public: + template <typename T> + Convertible(T&& value) : vtable(vtableForType<std::decay_t<T>>()) { + static_assert(sizeof(Storage) >= sizeof(std::decay_t<T>), "Storage must be large enough to hold value type"); + new (static_cast<void*>(&storage)) std::decay_t<T>(std::forward<T>(value)); + } + + Convertible(Convertible&& v) + : vtable(v.vtable) + { + if (vtable) { + vtable->move(std::move(v.storage), this->storage); + } + } + + ~Convertible() { + if (vtable) { + vtable->destroy(storage); + } + } + + Convertible& operator=(Convertible&& v) { + if (vtable) { + vtable->destroy(storage); + } + vtable = v.vtable; + if (vtable) { + vtable->move(std::move(v.storage), this->storage); + } + v.vtable = nullptr; + return *this; + } + + Convertible() = delete; + Convertible(const Convertible&) = delete; + Convertible& operator=(const Convertible&) = delete; + + friend inline bool isUndefined(const Convertible& v) { + assert(v.vtable); + return v.vtable->isUndefined(v.storage); + } + + friend inline bool isArray(const Convertible& v) { + assert(v.vtable); + return v.vtable->isArray(v.storage); + } + + friend inline std::size_t arrayLength(const Convertible& v) { + assert(v.vtable); + return v.vtable->arrayLength(v.storage); + } + + friend inline Convertible arrayMember(const Convertible& v, std::size_t i) { + assert(v.vtable); + return v.vtable->arrayMember(v.storage, i); + } + + friend inline bool isObject(const Convertible& v) { + assert(v.vtable); + return v.vtable->isObject(v.storage); + } + + friend inline optional<Convertible> objectMember(const Convertible& v, const char * name) { + assert(v.vtable); + return v.vtable->objectMember(v.storage, name); + } + + friend inline optional<Error> eachMember(const Convertible& v, const std::function<optional<Error> (const std::string&, const Convertible&)>& fn) { + assert(v.vtable); + return v.vtable->eachMember(v.storage, fn); + } + + friend inline optional<bool> toBool(const Convertible& v) { + assert(v.vtable); + return v.vtable->toBool(v.storage); + } + + friend inline optional<float> toNumber(const Convertible& v) { + assert(v.vtable); + return v.vtable->toNumber(v.storage); + } + + friend inline optional<double> toDouble(const Convertible& v) { + assert(v.vtable); + return v.vtable->toDouble(v.storage); + } + + friend inline optional<std::string> toString(const Convertible& v) { + assert(v.vtable); + return v.vtable->toString(v.storage); + } + + friend inline optional<Value> toValue(const Convertible& v) { + assert(v.vtable); + return v.vtable->toValue(v.storage); + } + + friend inline optional<GeoJSON> toGeoJSON(const Convertible& v, Error& error) { + assert(v.vtable); + return v.vtable->toGeoJSON(v.storage, error); + } + +private: +#if __ANDROID__ + // Android: JSValue* or mbgl::android::Value + using Storage = std::aligned_storage_t<32, 8>; +#elif __QT__ + // Qt: JSValue* or QVariant + using Storage = std::aligned_storage_t<32, 8>; +#else + // Node: JSValue* or v8::Local<v8::Value> + // iOS/macOS: JSValue* or id + using Storage = std::aligned_storage_t<8, 8>; +#endif + + struct VTable { + void (*move) (Storage&& src, Storage& dest); + void (*destroy) (Storage&); + + bool (*isUndefined) (const Storage&); + + bool (*isArray) (const Storage&); + std::size_t (*arrayLength) (const Storage&); + Convertible (*arrayMember) (const Storage&, std::size_t); + + bool (*isObject) (const Storage&); + optional<Convertible> (*objectMember) (const Storage&, const char *); + optional<Error> (*eachMember) (const Storage&, const std::function<optional<Error> (const std::string&, const Convertible&)>&); + + optional<bool> (*toBool) (const Storage&); + optional<float> (*toNumber) (const Storage&); + optional<double> (*toDouble) (const Storage&); + optional<std::string> (*toString) (const Storage&); + optional<Value> (*toValue) (const Storage&); + + // https://github.com/mapbox/mapbox-gl-native/issues/5623 + optional<GeoJSON> (*toGeoJSON) (const Storage&, Error&); + }; + + // Extracted this function from the table below to work around a GCC bug with differing + // visibility settings for capturing lambdas: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80947 + template <typename T> + static auto vtableEachMember(const Storage& s, const std::function<optional<Error>(const std::string&, const Convertible&)>& fn) { + return ConversionTraits<T>::eachMember(reinterpret_cast<const T&>(s), [&](const std::string& k, T&& v) { + return fn(k, Convertible(std::move(v))); + }); + } + + template <typename T> + static VTable* vtableForType() { + using Traits = ConversionTraits<T>; + static VTable vtable = { + [] (Storage&& src, Storage& dest) { + auto srcValue = reinterpret_cast<T&&>(src); + new (static_cast<void*>(&dest)) T(std::move(srcValue)); + srcValue.~T(); + }, + [] (Storage& s) { + reinterpret_cast<T&>(s).~T(); + }, + [] (const Storage& s) { + return Traits::isUndefined(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s) { + return Traits::isArray(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s) { + return Traits::arrayLength(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s, std::size_t i) { + return Convertible(Traits::arrayMember(reinterpret_cast<const T&>(s), i)); + }, + [] (const Storage& s) { + return Traits::isObject(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s, const char * key) { + optional<T> member = Traits::objectMember(reinterpret_cast<const T&>(s), key); + if (member) { + return optional<Convertible>(Convertible(std::move(*member))); + } else { + return optional<Convertible>(); + } + }, + vtableEachMember<T>, + [] (const Storage& s) { + return Traits::toBool(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s) { + return Traits::toNumber(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s) { + return Traits::toDouble(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s) { + return Traits::toString(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s) { + return Traits::toValue(reinterpret_cast<const T&>(s)); + }, + [] (const Storage& s, Error& err) { + return Traits::toGeoJSON(reinterpret_cast<const T&>(s), err); + } + }; + return &vtable; + } + + VTable* vtable; + Storage storage; +}; + template <class T, class Enable = void> struct Converter; -template <class T, class V, class...Args> -optional<T> convert(const V& value, Error& error, Args&&...args) { +template <class T, class...Args> +optional<T> convert(const Convertible& value, Error& error, Args&&...args) { return Converter<T>()(value, error, std::forward<Args>(args)...); } diff --git a/include/mbgl/style/conversion/constant.hpp b/include/mbgl/style/conversion/constant.hpp index 07c0a35fae..7b3249da52 100644 --- a/include/mbgl/style/conversion/constant.hpp +++ b/include/mbgl/style/conversion/constant.hpp @@ -1,7 +1,6 @@ #pragma once #include <mbgl/style/conversion.hpp> -#include <mbgl/util/optional.hpp> #include <mbgl/util/color.hpp> #include <mbgl/util/enum.hpp> #include <mbgl/util/string.hpp> @@ -16,47 +15,22 @@ namespace conversion { template <> struct Converter<bool> { - template <class V> - optional<bool> operator()(const V& value, Error& error) const { - optional<bool> converted = toBool(value); - if (!converted) { - error = { "value must be a boolean" }; - return {}; - } - return *converted; - } + optional<bool> operator()(const Convertible& value, Error& error) const; }; template <> struct Converter<float> { - template <class V> - optional<float> operator()(const V& value, Error& error) const { - optional<float> converted = toNumber(value); - if (!converted) { - error = { "value must be a number" }; - return {}; - } - return *converted; - } + optional<float> operator()(const Convertible& value, Error& error) const; }; template <> struct Converter<std::string> { - template <class V> - optional<std::string> operator()(const V& value, Error& error) const { - optional<std::string> converted = toString(value); - if (!converted) { - error = { "value must be a string" }; - return {}; - } - return *converted; - } + optional<std::string> operator()(const Convertible& value, Error& error) const; }; template <class T> struct Converter<T, typename std::enable_if_t<std::is_enum<T>::value>> { - template <class V> - optional<T> operator()(const V& value, Error& error) const { + optional<T> operator()(const Convertible& value, Error& error) const { optional<std::string> string = toString(value); if (!string) { error = { "value must be a string" }; @@ -75,28 +49,12 @@ struct Converter<T, typename std::enable_if_t<std::is_enum<T>::value>> { template <> struct Converter<Color> { - template <class V> - optional<Color> operator()(const V& value, Error& error) const { - optional<std::string> string = toString(value); - if (!string) { - error = { "value must be a string" }; - return {}; - } - - optional<Color> color = Color::parse(*string); - if (!color) { - error = { "value must be a valid color" }; - return {}; - } - - return *color; - } + optional<Color> operator()(const Convertible& value, Error& error) const; }; template <size_t N> struct Converter<std::array<float, N>> { - template <class V> - optional<std::array<float, N>> operator()(const V& value, Error& error) const { + optional<std::array<float, N>> operator()(const Convertible& value, Error& error) const { if (!isArray(value) || arrayLength(value) != N) { error = { "value must be an array of " + util::toString(N) + " numbers" }; return {}; @@ -117,52 +75,12 @@ struct Converter<std::array<float, N>> { template <> struct Converter<std::vector<float>> { - template <class V> - optional<std::vector<float>> operator()(const V& value, Error& error) const { - if (!isArray(value)) { - error = { "value must be an array" }; - return {}; - } - - std::vector<float> result; - result.reserve(arrayLength(value)); - - for (std::size_t i = 0; i < arrayLength(value); ++i) { - optional<float> number = toNumber(arrayMember(value, i)); - if (!number) { - error = { "value must be an array of numbers" }; - return {}; - } - result.push_back(*number); - } - - return result; - } + optional<std::vector<float>> operator()(const Convertible& value, Error& error) const; }; template <> struct Converter<std::vector<std::string>> { - template <class V> - optional<std::vector<std::string>> operator()(const V& value, Error& error) const { - if (!isArray(value)) { - error = { "value must be an array" }; - return {}; - } - - std::vector<std::string> result; - result.reserve(arrayLength(value)); - - for (std::size_t i = 0; i < arrayLength(value); ++i) { - optional<std::string> string = toString(arrayMember(value, i)); - if (!string) { - error = { "value must be an array of strings" }; - return {}; - } - result.push_back(*string); - } - - return result; - } + optional<std::vector<std::string>> operator()(const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/coordinate.hpp b/include/mbgl/style/conversion/coordinate.hpp index 732624e77f..e11db5e32f 100644 --- a/include/mbgl/style/conversion/coordinate.hpp +++ b/include/mbgl/style/conversion/coordinate.hpp @@ -10,26 +10,7 @@ namespace conversion { template<> struct Converter<LatLng> { public: - template <class V> - optional<LatLng> operator() (const V& value, Error& error) const { - if (!isArray(value) || arrayLength(value) < 2 ) { - error = { "coordinate array must contain numeric longitude and latitude values" }; - return {}; - } - //Style spec uses GeoJSON convention for specifying coordinates - optional<double> latitude = toDouble(arrayMember(value, 1)); - optional<double> longitude = toDouble(arrayMember(value, 0)); - - if (!latitude || !longitude) { - error = { "coordinate array must contain numeric longitude and latitude values" }; - return {}; - } - if (*latitude < -90 || *latitude > 90 ){ - error = { "coordinate latitude must be between -90 and 90" }; - return {}; - } - return LatLng(*latitude, *longitude); - } + optional<LatLng> operator() (const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/custom_geometry_source_options.hpp b/include/mbgl/style/conversion/custom_geometry_source_options.hpp new file mode 100644 index 0000000000..dedecd1aa4 --- /dev/null +++ b/include/mbgl/style/conversion/custom_geometry_source_options.hpp @@ -0,0 +1,84 @@ +#pragma once + +#include <mbgl/style/conversion.hpp> +#include <mbgl/style/sources/custom_geometry_source.hpp> + +namespace mbgl { +namespace style { +namespace conversion { + +template <> +struct Converter<CustomGeometrySource::Options> { + + template <class V> + optional<CustomGeometrySource::Options> operator()(const V& value, Error& error) const { + CustomGeometrySource::Options options; + + const auto minzoomValue = objectMember(value, "minzoom"); + if (minzoomValue) { + if (toNumber(*minzoomValue)) { + options.zoomRange.min = static_cast<uint8_t>(*toNumber(*minzoomValue)); + } else { + error = { "GeoJSON source minzoom value must be a number" }; + return {}; + } + } + + const auto maxzoomValue = objectMember(value, "maxzoom"); + if (maxzoomValue) { + if (toNumber(*maxzoomValue)) { + options.zoomRange.max = static_cast<uint8_t>(*toNumber(*maxzoomValue)); + } else { + error = { "GeoJSON source maxzoom value must be a number" }; + return {}; + } + } + + const auto bufferValue = objectMember(value, "buffer"); + if (bufferValue) { + if (toNumber(*bufferValue)) { + options.tileOptions.buffer = static_cast<uint16_t>(*toNumber(*bufferValue)); + } else { + error = { "GeoJSON source buffer value must be a number" }; + return {}; + } + } + + const auto toleranceValue = objectMember(value, "tolerance"); + if (toleranceValue) { + if (toNumber(*toleranceValue)) { + options.tileOptions.tolerance = static_cast<double>(*toNumber(*toleranceValue)); + } else { + error = { "GeoJSON source tolerance value must be a number" }; + return {}; + } + } + + const auto wrapValue = objectMember(value, "wrap"); + if (wrapValue) { + if (toBool(*wrapValue)) { + options.tileOptions.wrap = static_cast<bool>(*toBool(*wrapValue)); + } else { + error = { "CustomGeometrySource TileOptions wrap value must be a boolean" }; + return {}; + } + } + + const auto clipValue = objectMember(value, "clip"); + if (clipValue) { + if (toBool(*clipValue)) { + options.tileOptions.clip = static_cast<double>(*toBool(*clipValue)); + } else { + error = { "CustomGeometrySource TileOptiosn clip value must be a boolean" }; + return {}; + } + } + + return { options }; + } + +}; + +} // namespace conversion +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/conversion/data_driven_property_value.hpp b/include/mbgl/style/conversion/data_driven_property_value.hpp index 79b15dcfb0..8880d28fb1 100644 --- a/include/mbgl/style/conversion/data_driven_property_value.hpp +++ b/include/mbgl/style/conversion/data_driven_property_value.hpp @@ -4,6 +4,13 @@ #include <mbgl/style/conversion.hpp> #include <mbgl/style/conversion/constant.hpp> #include <mbgl/style/conversion/function.hpp> +#include <mbgl/style/conversion/expression.hpp> +#include <mbgl/style/expression/is_expression.hpp> +#include <mbgl/style/expression/is_constant.hpp> +#include <mbgl/style/expression/find_zoom_curve.hpp> + +#include <unordered_set> + namespace mbgl { namespace style { @@ -11,10 +18,27 @@ namespace conversion { template <class T> struct Converter<DataDrivenPropertyValue<T>> { - template <class V> - optional<DataDrivenPropertyValue<T>> operator()(const V& value, Error& error) const { + + optional<DataDrivenPropertyValue<T>> operator()(const Convertible& value, Error& error) const { if (isUndefined(value)) { return DataDrivenPropertyValue<T>(); + } else if (expression::isExpression(value)) { + optional<std::unique_ptr<Expression>> expression = convert<std::unique_ptr<Expression>>( + value, + error, + valueTypeToExpressionType<T>()); + + if (!expression) { + return {}; + } + + if (isFeatureConstant(**expression)) { + return DataDrivenPropertyValue<T>(CameraFunction<T>(std::move(*expression))); + } else if (isZoomConstant(**expression)) { + return DataDrivenPropertyValue<T>(SourceFunction<T>(std::move(*expression))); + } else { + return DataDrivenPropertyValue<T>(CompositeFunction<T>(std::move(*expression))); + } } else if (!isObject(value)) { optional<T> constant = convert<T>(value, error); if (!constant) { diff --git a/include/mbgl/style/conversion/expression.hpp b/include/mbgl/style/conversion/expression.hpp new file mode 100644 index 0000000000..c5fcf906a7 --- /dev/null +++ b/include/mbgl/style/conversion/expression.hpp @@ -0,0 +1,39 @@ +#pragma once + +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/expression/type.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> + +namespace mbgl { +namespace style { +namespace conversion { + +using namespace mbgl::style::expression; + +template<> struct Converter<std::unique_ptr<Expression>> { + optional<std::unique_ptr<Expression>> operator()(const Convertible& value, Error& error, type::Type expected) const { + ParsingContext ctx(optional<type::Type> {expected}); + ParseResult parsed = ctx.parse(value); + if (parsed) { + return std::move(*parsed); + } + std::string combinedError; + for (const ParsingError& parsingError : ctx.getErrors()) { + if (combinedError.size() > 0) { + combinedError += "\n"; + } + if (parsingError.key.size() > 0) { + combinedError += parsingError.key + ": "; + } + combinedError += parsingError.message; + } + error = { combinedError }; + return {}; + }; +}; + +} // namespace conversion +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/conversion/filter.hpp b/include/mbgl/style/conversion/filter.hpp index 986d1bf80d..9daf6ea7a4 100644 --- a/include/mbgl/style/conversion/filter.hpp +++ b/include/mbgl/style/conversion/filter.hpp @@ -2,7 +2,6 @@ #include <mbgl/style/filter.hpp> #include <mbgl/style/conversion.hpp> -#include <mbgl/util/geometry.hpp> namespace mbgl { namespace style { @@ -11,247 +10,7 @@ namespace conversion { template <> struct Converter<Filter> { public: - template <class V> - optional<Filter> operator()(const V& value, Error& error) const { - if (!isArray(value)) { - error = { "filter expression must be an array" }; - return {}; - } - - if (arrayLength(value) < 1) { - error = { "filter expression must have at least 1 element" }; - return {}; - } - - optional<std::string> op = toString(arrayMember(value, 0)); - if (!op) { - error = { "filter operator must be a string" }; - return {}; - } - - if (*op == "==") { - return convertEqualityFilter<EqualsFilter, TypeEqualsFilter, IdentifierEqualsFilter>(value, error); - } else if (*op == "!=") { - return convertEqualityFilter<NotEqualsFilter, TypeNotEqualsFilter, IdentifierNotEqualsFilter>(value, error); - } else if (*op == ">") { - return convertBinaryFilter<GreaterThanFilter>(value, error); - } else if (*op == ">=") { - return convertBinaryFilter<GreaterThanEqualsFilter>(value, error); - } else if (*op == "<") { - return convertBinaryFilter<LessThanFilter>(value, error); - } else if (*op == "<=") { - return convertBinaryFilter<LessThanEqualsFilter>(value, error); - } else if (*op == "in") { - return convertSetFilter<InFilter, TypeInFilter, IdentifierInFilter>(value, error); - } else if (*op == "!in") { - return convertSetFilter<NotInFilter, TypeNotInFilter, IdentifierNotInFilter>(value, error); - } else if (*op == "all") { - return convertCompoundFilter<AllFilter>(value, error); - } else if (*op == "any") { - return convertCompoundFilter<AnyFilter>(value, error); - } else if (*op == "none") { - return convertCompoundFilter<NoneFilter>(value, error); - } else if (*op == "has") { - return convertUnaryFilter<HasFilter, HasIdentifierFilter>(value, error); - } else if (*op == "!has") { - return convertUnaryFilter<NotHasFilter, NotHasIdentifierFilter>(value, error); - } - - error = { R"(filter operator must be one of "==", "!=", ">", ">=", "<", "<=", "in", "!in", "all", "any", "none", "has", or "!has")" }; - return {}; - } - -private: - optional<Value> normalizeValue(const optional<Value>& value, Error& error) const { - if (!value) { - error = { "filter expression value must be a boolean, number, or string" }; - return {}; - } else { - return *value; - } - } - - template <class V> - optional<FeatureType> toFeatureType(const V& value, Error& error) const { - optional<std::string> type = toString(value); - if (!type) { - error = { "value for $type filter must be a string" }; - return {}; - } else if (*type == "Point") { - return FeatureType::Point; - } else if (*type == "LineString") { - return FeatureType::LineString; - } else if (*type == "Polygon") { - return FeatureType::Polygon; - } else { - error = { "value for $type filter must be Point, LineString, or Polygon" }; - return {}; - } - } - - template <class V> - optional<FeatureIdentifier> toFeatureIdentifier(const V& value, Error& error) const { - optional<Value> identifier = toValue(value); - if (!identifier) { - error = { "filter expression value must be a boolean, number, or string" }; - return {}; - } else { - return (*identifier).match( - [] (uint64_t t) -> optional<FeatureIdentifier> { return { t }; }, - [] ( int64_t t) -> optional<FeatureIdentifier> { return { t }; }, - [] ( double t) -> optional<FeatureIdentifier> { return { t }; }, - [] (const std::string& t) -> optional<FeatureIdentifier> { return { t }; }, - [&] (const auto&) -> optional<FeatureIdentifier> { - error = { "filter expression value must be a boolean, number, or string" }; - return {}; - }); - } - } - - template <class FilterType, class IdentifierFilterType, class V> - optional<Filter> convertUnaryFilter(const V& value, Error& error) const { - if (arrayLength(value) < 2) { - error = { "filter expression must have 2 elements" }; - return {}; - } - - optional<std::string> key = toString(arrayMember(value, 1)); - if (!key) { - error = { "filter expression key must be a string" }; - return {}; - } - - if (*key == "$id") { - return { IdentifierFilterType {} }; - } else { - return { FilterType { *key } }; - } - } - - template <class FilterType, class TypeFilterType, class IdentifierFilterType, class V> - optional<Filter> convertEqualityFilter(const V& value, Error& error) const { - if (arrayLength(value) < 3) { - error = { "filter expression must have 3 elements" }; - return {}; - } - - optional<std::string> key = toString(arrayMember(value, 1)); - if (!key) { - error = { "filter expression key must be a string" }; - return {}; - } - - if (*key == "$type") { - optional<FeatureType> filterValue = toFeatureType(arrayMember(value, 2), error); - if (!filterValue) { - return {}; - } - - return { TypeFilterType { *filterValue } }; - - } else if (*key == "$id") { - optional<FeatureIdentifier> filterValue = toFeatureIdentifier(arrayMember(value, 2), error); - if (!filterValue) { - return {}; - } - - return { IdentifierFilterType { *filterValue } }; - - } else { - optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error); - if (!filterValue) { - return {}; - } - - return { FilterType { *key, *filterValue } }; - } - } - - template <class FilterType, class V> - optional<Filter> convertBinaryFilter(const V& value, Error& error) const { - if (arrayLength(value) < 3) { - error = { "filter expression must have 3 elements" }; - return {}; - } - - optional<std::string> key = toString(arrayMember(value, 1)); - if (!key) { - error = { "filter expression key must be a string" }; - return {}; - } - - optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, 2)), error); - if (!filterValue) { - return {}; - } - - return { FilterType { *key, *filterValue } }; - } - - template <class FilterType, class TypeFilterType, class IdentifierFilterType, class V> - optional<Filter> convertSetFilter(const V& value, Error& error) const { - if (arrayLength(value) < 2) { - error = { "filter expression must at least 2 elements" }; - return {}; - } - - optional<std::string> key = toString(arrayMember(value, 1)); - if (!key) { - error = { "filter expression key must be a string" }; - return {}; - } - - if (*key == "$type") { - std::vector<FeatureType> values; - for (std::size_t i = 2; i < arrayLength(value); ++i) { - optional<FeatureType> filterValue = toFeatureType(arrayMember(value, i), error); - if (!filterValue) { - return {}; - } - values.push_back(*filterValue); - } - - return { TypeFilterType { std::move(values) } }; - - } else if (*key == "$id") { - std::vector<FeatureIdentifier> values; - for (std::size_t i = 2; i < arrayLength(value); ++i) { - optional<FeatureIdentifier> filterValue = toFeatureIdentifier(arrayMember(value, i), error); - if (!filterValue) { - return {}; - } - values.push_back(*filterValue); - } - - return { IdentifierFilterType { std::move(values) } }; - - } else { - std::vector<Value> values; - for (std::size_t i = 2; i < arrayLength(value); ++i) { - optional<Value> filterValue = normalizeValue(toValue(arrayMember(value, i)), error); - if (!filterValue) { - return {}; - } - values.push_back(*filterValue); - } - - return { FilterType { *key, std::move(values) } }; - } - } - - template <class FilterType, class V> - optional<Filter> convertCompoundFilter(const V& value, Error& error) const { - std::vector<Filter> filters; - for (std::size_t i = 1; i < arrayLength(value); ++i) { - optional<Filter> element = operator()(arrayMember(value, i), error); - if (!element) { - return {}; - } - filters.push_back(*element); - } - - return { FilterType { std::move(filters) } }; - } + optional<Filter> operator()(const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/function.hpp b/include/mbgl/style/conversion/function.hpp index 752b6dd045..e230884944 100644 --- a/include/mbgl/style/conversion/function.hpp +++ b/include/mbgl/style/conversion/function.hpp @@ -11,8 +11,8 @@ namespace mbgl { namespace style { namespace conversion { -template <class D, class R, class V> -optional<std::map<D, R>> convertStops(const V& value, Error& error) { +template <class D, class R> +optional<std::map<D, R>> convertStops(const Convertible& value, Error& error) { auto stopsValue = objectMember(value, "stops"); if (!stopsValue) { error = { "function value must specify stops" }; @@ -63,8 +63,7 @@ template <class T> struct Converter<ExponentialStops<T>> { static constexpr const char * type = "exponential"; - template <class V> - optional<ExponentialStops<T>> operator()(const V& value, Error& error) const { + optional<ExponentialStops<T>> operator()(const Convertible& value, Error& error) const { auto stops = convertStops<float, T>(value, error); if (!stops) { return {}; @@ -89,8 +88,7 @@ template <class T> struct Converter<IntervalStops<T>> { static constexpr const char * type = "interval"; - template <class V> - optional<IntervalStops<T>> operator()(const V& value, Error& error) const { + optional<IntervalStops<T>> operator()(const Convertible& value, Error& error) const { auto stops = convertStops<float, T>(value, error); if (!stops) { return {}; @@ -101,8 +99,7 @@ struct Converter<IntervalStops<T>> { template <> struct Converter<CategoricalValue> { - template <class V> - optional<CategoricalValue> operator()(const V& value, Error& error) const { + optional<CategoricalValue> operator()(const Convertible& value, Error& error) const { auto b = toBool(value); if (b) { return { *b }; @@ -127,8 +124,7 @@ template <class T> struct Converter<CategoricalStops<T>> { static constexpr const char * type = "categorical"; - template <class V> - optional<CategoricalStops<T>> operator()(const V& value, Error& error) const { + optional<CategoricalStops<T>> operator()(const Convertible& value, Error& error) const { auto stops = convertStops<CategoricalValue, T>(value, error); if (!stops) { return {}; @@ -142,8 +138,7 @@ template <class T> struct Converter<IdentityStops<T>> { static constexpr const char * type = "identity"; - template <class V> - optional<IdentityStops<T>> operator()(const V&, Error&) const { + optional<IdentityStops<T>> operator()(const Convertible&, Error&) const { return IdentityStops<T>(); } }; @@ -154,8 +149,7 @@ struct StopsConverter; template <class T, class... Ts> struct StopsConverter<T, variant<Ts...>> { public: - template <class V> - optional<variant<Ts...>> operator()(const V& value, Error& error) const { + optional<variant<Ts...>> operator()(const Convertible& value, Error& error) const { std::string type = util::Interpolatable<T>::value ? "exponential" : "interval"; auto typeValue = objectMember(value, "type"); @@ -193,8 +187,7 @@ public: template <class T> struct Converter<CameraFunction<T>> { - template <class V> - optional<CameraFunction<T>> operator()(const V& value, Error& error) const { + optional<CameraFunction<T>> operator()(const Convertible& value, Error& error) const { if (!isObject(value)) { error = { "function must be an object" }; return {}; @@ -209,8 +202,8 @@ struct Converter<CameraFunction<T>> { } }; -template <class T, class V> -optional<optional<T>> convertDefaultValue(const V& value, Error& error) { +template <class T> +optional<optional<T>> convertDefaultValue(const Convertible& value, Error& error) { auto defaultValueValue = objectMember(value, "default"); if (!defaultValueValue) { return optional<T>(); @@ -227,8 +220,7 @@ optional<optional<T>> convertDefaultValue(const V& value, Error& error) { template <class T> struct Converter<SourceFunction<T>> { - template <class V> - optional<SourceFunction<T>> operator()(const V& value, Error& error) const { + optional<SourceFunction<T>> operator()(const Convertible& value, Error& error) const { if (!isObject(value)) { error = { "function must be an object" }; return {}; @@ -267,8 +259,7 @@ struct CompositeValue : std::pair<float, S> { template <class S> struct Converter<CompositeValue<S>> { - template <class V> - optional<CompositeValue<S>> operator()(const V& value, Error& error) const { + optional<CompositeValue<S>> operator()(const Convertible& value, Error& error) const { if (!isObject(value)) { error = { "stop must be an object" }; return {}; @@ -304,8 +295,7 @@ template <class T> struct Converter<CompositeExponentialStops<T>> { static constexpr const char * type = "exponential"; - template <class V> - optional<CompositeExponentialStops<T>> operator()(const V& value, Error& error) const { + optional<CompositeExponentialStops<T>> operator()(const Convertible& value, Error& error) const { auto stops = convertStops<CompositeValue<float>, T>(value, error); if (!stops) { return {}; @@ -330,8 +320,7 @@ template <class T> struct Converter<CompositeIntervalStops<T>> { static constexpr const char * type = "interval"; - template <class V> - optional<CompositeIntervalStops<T>> operator()(const V& value, Error& error) const { + optional<CompositeIntervalStops<T>> operator()(const Convertible& value, Error& error) const { auto stops = convertStops<CompositeValue<float>, T>(value, error); if (!stops) { return {}; @@ -350,8 +339,7 @@ template <class T> struct Converter<CompositeCategoricalStops<T>> { static constexpr const char * type = "categorical"; - template <class V> - optional<CompositeCategoricalStops<T>> operator()(const V& value, Error& error) const { + optional<CompositeCategoricalStops<T>> operator()(const Convertible& value, Error& error) const { auto stops = convertStops<CompositeValue<CategoricalValue>, T>(value, error); if (!stops) { return {}; @@ -368,8 +356,7 @@ struct Converter<CompositeCategoricalStops<T>> { template <class T> struct Converter<CompositeFunction<T>> { - template <class V> - optional<CompositeFunction<T>> operator()(const V& value, Error& error) const { + optional<CompositeFunction<T>> operator()(const Convertible& value, Error& error) const { if (!isObject(value)) { error = { "function must be an object" }; return {}; diff --git a/include/mbgl/style/conversion/geojson.hpp b/include/mbgl/style/conversion/geojson.hpp index 0b594f066c..403c5f953b 100644 --- a/include/mbgl/style/conversion/geojson.hpp +++ b/include/mbgl/style/conversion/geojson.hpp @@ -7,15 +7,13 @@ namespace mbgl { namespace style { namespace conversion { +// Workaround until https://github.com/mapbox/mapbox-gl-native/issues/5623 is done. +optional<GeoJSON> parseGeoJSON(const std::string&, Error&); + template <> struct Converter<GeoJSON> { public: - optional<GeoJSON> operator()(const std::string&, Error&) const; - - // This is explicitly specialized in the .cpp file for JSValue. It may also be explicitly - // specialized for SDK-specific types (e.g. mbgl::android::Value). - template <class V> - optional<GeoJSON> operator()(const V&, Error&) const; + optional<GeoJSON> operator()(const Convertible&, Error&) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/geojson_options.hpp b/include/mbgl/style/conversion/geojson_options.hpp index 1c9c18250c..3f625babb6 100644 --- a/include/mbgl/style/conversion/geojson_options.hpp +++ b/include/mbgl/style/conversion/geojson_options.hpp @@ -9,84 +9,7 @@ namespace conversion { template <> struct Converter<GeoJSONOptions> { - - template <class V> - optional<GeoJSONOptions> operator()(const V& value, Error& error) const { - GeoJSONOptions options; - - const auto minzoomValue = objectMember(value, "minzoom"); - if (minzoomValue) { - if (toNumber(*minzoomValue)) { - options.minzoom = static_cast<uint8_t>(*toNumber(*minzoomValue)); - } else { - error = { "GeoJSON source minzoom value must be a number" }; - return {}; - } - } - - const auto maxzoomValue = objectMember(value, "maxzoom"); - if (maxzoomValue) { - if (toNumber(*maxzoomValue)) { - options.maxzoom = static_cast<uint8_t>(*toNumber(*maxzoomValue)); - } else { - error = { "GeoJSON source maxzoom value must be a number" }; - return {}; - } - } - - const auto bufferValue = objectMember(value, "buffer"); - if (bufferValue) { - if (toNumber(*bufferValue)) { - options.buffer = static_cast<uint16_t>(*toNumber(*bufferValue)); - } else { - error = { "GeoJSON source buffer value must be a number" }; - return {}; - } - } - - const auto toleranceValue = objectMember(value, "tolerance"); - if (toleranceValue) { - if (toNumber(*toleranceValue)) { - options.tolerance = static_cast<double>(*toNumber(*toleranceValue)); - } else { - error = { "GeoJSON source tolerance value must be a number" }; - return {}; - } - } - - const auto clusterValue = objectMember(value, "cluster"); - if (clusterValue) { - if (toBool(*clusterValue)) { - options.cluster = *toBool(*clusterValue); - } else { - error = { "GeoJSON source cluster value must be a boolean" }; - return {}; - } - } - - const auto clusterMaxZoomValue = objectMember(value, "clusterMaxZoom"); - if (clusterMaxZoomValue) { - if (toNumber(*clusterMaxZoomValue)) { - options.clusterMaxZoom = static_cast<uint8_t>(*toNumber(*clusterMaxZoomValue)); - } else { - error = { "GeoJSON source clusterMaxZoom value must be a number" }; - return {}; - } - } - - const auto clusterRadiusValue = objectMember(value, "clusterRadius"); - if (clusterRadiusValue) { - if (toNumber(*clusterRadiusValue)) { - options.clusterRadius = static_cast<double>(*toNumber(*clusterRadiusValue)); - } else { - error = { "GeoJSON source clusterRadius value must be a number" }; - return {}; - } - } - - return { options }; - } - + optional<GeoJSONOptions> operator()(const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/get_json_type.hpp b/include/mbgl/style/conversion/get_json_type.hpp new file mode 100644 index 0000000000..f7efebccce --- /dev/null +++ b/include/mbgl/style/conversion/get_json_type.hpp @@ -0,0 +1,14 @@ +#pragma once + +#include <mbgl/style/conversion.hpp> +#include <string> + +namespace mbgl { +namespace style { +namespace conversion { + +std::string getJSONType(const Convertible& value); + +} // namespace conversion +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/conversion/layer.hpp b/include/mbgl/style/conversion/layer.hpp index c694c3162a..1c0e2e2f07 100644 --- a/include/mbgl/style/conversion/layer.hpp +++ b/include/mbgl/style/conversion/layer.hpp @@ -1,223 +1,24 @@ #pragma once #include <mbgl/style/layer.hpp> -#include <mbgl/style/layers/background_layer.hpp> -#include <mbgl/style/layers/circle_layer.hpp> -#include <mbgl/style/layers/fill_layer.hpp> -#include <mbgl/style/layers/fill_extrusion_layer.hpp> -#include <mbgl/style/layers/line_layer.hpp> -#include <mbgl/style/layers/raster_layer.hpp> -#include <mbgl/style/layers/symbol_layer.hpp> #include <mbgl/style/conversion.hpp> -#include <mbgl/style/conversion/constant.hpp> -#include <mbgl/style/conversion/filter.hpp> -#include <mbgl/style/conversion/make_property_setters.hpp> + +#include <memory> namespace mbgl { namespace style { namespace conversion { -template <class V> -optional<Error> setLayoutProperty(Layer& layer, const std::string& name, const V& value) { - static const auto setters = makeLayoutPropertySetters<V>(); - auto it = setters.find(name); - if (it == setters.end()) { - return Error { "property not found" }; - } - return it->second(layer, value); -} - -template <class V> -optional<Error> setPaintProperty(Layer& layer, const std::string& name, const V& value) { - static const auto setters = makePaintPropertySetters<V>(); - auto it = setters.find(name); - if (it == setters.end()) { - return Error { "property not found" }; - } - return it->second(layer, value); -} - -template <class V> -optional<Error> setPaintProperties(Layer& layer, const V& value) { - auto paintValue = objectMember(value, "paint"); - if (!paintValue) { - return {}; - } - if (!isObject(*paintValue)) { - return { { "paint must be an object" } }; - } - return eachMember(*paintValue, [&] (const std::string& k, const V& v) { - return setPaintProperty(layer, k, v); - }); -} - template <> struct Converter<std::unique_ptr<Layer>> { public: - template <class V> - optional<std::unique_ptr<Layer>> operator()(const V& value, Error& error) const { - if (!isObject(value)) { - error = { "layer must be an object" }; - return {}; - } - - auto idValue = objectMember(value, "id"); - if (!idValue) { - error = { "layer must have an id" }; - return {}; - } - - optional<std::string> id = toString(*idValue); - if (!id) { - error = { "layer id must be a string" }; - return {}; - } - - auto typeValue = objectMember(value, "type"); - if (!typeValue) { - error = { "layer must have a type" }; - return {}; - } - - optional<std::string> type = toString(*typeValue); - if (!type) { - error = { "layer type must be a string" }; - return {}; - } - - optional<std::unique_ptr<Layer>> converted; - - if (*type == "fill") { - converted = convertVectorLayer<FillLayer>(*id, value, error); - } else if (*type == "fill-extrusion") { - converted = convertVectorLayer<FillExtrusionLayer>(*id, value, error); - } else if (*type == "line") { - converted = convertVectorLayer<LineLayer>(*id, value, error); - } else if (*type == "circle") { - converted = convertVectorLayer<CircleLayer>(*id, value, error); - } else if (*type == "symbol") { - converted = convertVectorLayer<SymbolLayer>(*id, value, error); - } else if (*type == "raster") { - converted = convertRasterLayer(*id, value, error); - } else if (*type == "background") { - converted = convertBackgroundLayer(*id, value, error); - } else { - error = { "invalid layer type" }; - return {}; - } - - if (!converted) { - return converted; - } - - std::unique_ptr<Layer> layer = std::move(*converted); - - auto minzoomValue = objectMember(value, "minzoom"); - if (minzoomValue) { - optional<float> minzoom = toNumber(*minzoomValue); - if (!minzoom) { - error = { "minzoom must be numeric" }; - return {}; - } - layer->setMinZoom(*minzoom); - } - - auto maxzoomValue = objectMember(value, "maxzoom"); - if (maxzoomValue) { - optional<float> maxzoom = toNumber(*maxzoomValue); - if (!maxzoom) { - error = { "maxzoom must be numeric" }; - return {}; - } - layer->setMaxZoom(*maxzoom); - } - - auto layoutValue = objectMember(value, "layout"); - if (layoutValue) { - if (!isObject(*layoutValue)) { - error = { "layout must be an object" }; - return {}; - } - optional<Error> error_ = eachMember(*layoutValue, [&] (const std::string& k, const V& v) { - return setLayoutProperty(*layer, k, v); - }); - if (error_) { - error = *error_; - return {}; - } - } - - optional<Error> error_ = setPaintProperties(*layer, value); - if (error_) { - error = *error_; - return {}; - } - - return std::move(layer); - } - -private: - template <class LayerType, class V> - optional<std::unique_ptr<Layer>> convertVectorLayer(const std::string& id, const V& value, Error& error) const { - auto sourceValue = objectMember(value, "source"); - if (!sourceValue) { - error = { "layer must have a source" }; - return {}; - } - - optional<std::string> source = toString(*sourceValue); - if (!source) { - error = { "layer source must be a string" }; - return {}; - } - - std::unique_ptr<LayerType> layer = std::make_unique<LayerType>(id, *source); - - auto sourceLayerValue = objectMember(value, "source-layer"); - if (sourceLayerValue) { - optional<std::string> sourceLayer = toString(*sourceLayerValue); - if (!sourceLayer) { - error = { "layer source-layer must be a string" }; - return {}; - } - layer->setSourceLayer(*sourceLayer); - } - - auto filterValue = objectMember(value, "filter"); - if (filterValue) { - optional<Filter> filter = convert<Filter>(*filterValue, error); - if (!filter) { - return {}; - } - layer->setFilter(*filter); - } - - return { std::move(layer) }; - } - - template <class V> - optional<std::unique_ptr<Layer>> convertRasterLayer(const std::string& id, const V& value, Error& error) const { - auto sourceValue = objectMember(value, "source"); - if (!sourceValue) { - error = { "layer must have a source" }; - return {}; - } - - optional<std::string> source = toString(*sourceValue); - if (!source) { - error = { "layer source must be a string" }; - return {}; - } - - return { std::make_unique<RasterLayer>(id, *source) }; - } - - template <class V> - optional<std::unique_ptr<Layer>> convertBackgroundLayer(const std::string& id, const V&, Error&) const { - return { std::make_unique<BackgroundLayer>(id) }; - } + optional<std::unique_ptr<Layer>> operator()(const Convertible& value, Error& error) const; }; +optional<Error> setLayoutProperty(Layer& layer, const std::string& name, const Convertible& value); +optional<Error> setPaintProperty(Layer& layer, const std::string& name, const Convertible& value); +optional<Error> setPaintProperties(Layer& layer, const Convertible& value); + } // namespace conversion } // namespace style } // namespace mbgl diff --git a/include/mbgl/style/conversion/light.hpp b/include/mbgl/style/conversion/light.hpp index ba162516c0..289fca2e31 100644 --- a/include/mbgl/style/conversion/light.hpp +++ b/include/mbgl/style/conversion/light.hpp @@ -2,9 +2,6 @@ #include <mbgl/style/light.hpp> #include <mbgl/style/conversion.hpp> -#include <mbgl/style/conversion/position.hpp> -#include <mbgl/style/conversion/property_value.hpp> -#include <mbgl/style/conversion/transition_options.hpp> namespace mbgl { namespace style { @@ -13,108 +10,7 @@ namespace conversion { template <> struct Converter<Light> { public: - template <class V> - optional<Light> operator()(const V& value, Error& error) const { - if (!isObject(value)) { - error = { "light must be an object" }; - return {}; - } - - Light light; - - const auto anchor = objectMember(value, "anchor"); - if (anchor) { - optional<PropertyValue<LightAnchorType>> convertedAnchor = - convert<PropertyValue<LightAnchorType>>(*anchor, error); - - if (convertedAnchor) { - light.setAnchor(*convertedAnchor); - } else { - return {}; - } - } - - const auto anchorTransition = objectMember(value, "anchor-transition"); - if (anchorTransition) { - optional<TransitionOptions> transition = - convert<TransitionOptions>(*anchorTransition, error); - if (transition) { - light.setAnchorTransition(*transition); - } else { - return {}; - } - } - - const auto color = objectMember(value, "color"); - if (color) { - optional<PropertyValue<Color>> convertedColor = - convert<PropertyValue<Color>>(*color, error); - - if (convertedColor) { - light.setColor(*convertedColor); - } else { - return {}; - } - } - - const auto colorTransition = objectMember(value, "color-transition"); - if (colorTransition) { - optional<TransitionOptions> transition = - convert<TransitionOptions>(*colorTransition, error); - if (transition) { - light.setColorTransition(*transition); - } else { - return {}; - } - } - - const auto position = objectMember(value, "position"); - if (position) { - optional<PropertyValue<Position>> convertedPosition = - convert<PropertyValue<Position>>(*position, error); - - if (convertedPosition) { - light.setPosition(*convertedPosition); - } else { - return {}; - } - } - - const auto positionTransition = objectMember(value, "position-transition"); - if (positionTransition) { - optional<TransitionOptions> transition = - convert<TransitionOptions>(*positionTransition, error); - if (transition) { - light.setPositionTransition(*transition); - } else { - return {}; - } - } - - const auto intensity = objectMember(value, "intensity"); - if (intensity) { - optional<PropertyValue<float>> convertedIntensity = - convert<PropertyValue<float>>(*intensity, error); - - if (convertedIntensity) { - light.setIntensity(*convertedIntensity); - } else { - return {}; - } - } - - const auto intensityTransition = objectMember(value, "intensity-transition"); - if (intensityTransition) { - optional<TransitionOptions> transition = - convert<TransitionOptions>(*intensityTransition, error); - if (transition) { - light.setIntensityTransition(*transition); - } else { - return {}; - } - } - return { std::move(light) }; - }; + optional<Light> operator()(const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/make_property_setters.hpp b/include/mbgl/style/conversion/make_property_setters.hpp deleted file mode 100644 index 59b0e7be32..0000000000 --- a/include/mbgl/style/conversion/make_property_setters.hpp +++ /dev/null @@ -1,211 +0,0 @@ -#pragma once - -// This file is generated. Edit make_property_setters.hpp.ejs, then run `make style-code`. - -#include <mbgl/style/conversion/property_setter.hpp> - -#include <mbgl/style/layers/fill_layer.hpp> -#include <mbgl/style/layers/line_layer.hpp> -#include <mbgl/style/layers/symbol_layer.hpp> -#include <mbgl/style/layers/circle_layer.hpp> -#include <mbgl/style/layers/fill_extrusion_layer.hpp> -#include <mbgl/style/layers/raster_layer.hpp> -#include <mbgl/style/layers/background_layer.hpp> - -#include <unordered_map> - -namespace mbgl { -namespace style { -namespace conversion { - -template <class V> -auto makeLayoutPropertySetters() { - std::unordered_map<std::string, PropertySetter<V>> result; - - result["visibility"] = &setVisibility<V>; - - - result["line-cap"] = &setProperty<V, LineLayer, PropertyValue<LineCapType>, &LineLayer::setLineCap>; - result["line-join"] = &setProperty<V, LineLayer, DataDrivenPropertyValue<LineJoinType>, &LineLayer::setLineJoin>; - result["line-miter-limit"] = &setProperty<V, LineLayer, PropertyValue<float>, &LineLayer::setLineMiterLimit>; - result["line-round-limit"] = &setProperty<V, LineLayer, PropertyValue<float>, &LineLayer::setLineRoundLimit>; - - result["symbol-placement"] = &setProperty<V, SymbolLayer, PropertyValue<SymbolPlacementType>, &SymbolLayer::setSymbolPlacement>; - result["symbol-spacing"] = &setProperty<V, SymbolLayer, PropertyValue<float>, &SymbolLayer::setSymbolSpacing>; - result["symbol-avoid-edges"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setSymbolAvoidEdges>; - result["icon-allow-overlap"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setIconAllowOverlap>; - result["icon-ignore-placement"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setIconIgnorePlacement>; - result["icon-optional"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setIconOptional>; - result["icon-rotation-alignment"] = &setProperty<V, SymbolLayer, PropertyValue<AlignmentType>, &SymbolLayer::setIconRotationAlignment>; - result["icon-size"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setIconSize>; - result["icon-text-fit"] = &setProperty<V, SymbolLayer, PropertyValue<IconTextFitType>, &SymbolLayer::setIconTextFit>; - result["icon-text-fit-padding"] = &setProperty<V, SymbolLayer, PropertyValue<std::array<float, 4>>, &SymbolLayer::setIconTextFitPadding>; - result["icon-image"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<std::string>, &SymbolLayer::setIconImage>; - result["icon-rotate"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setIconRotate>; - result["icon-padding"] = &setProperty<V, SymbolLayer, PropertyValue<float>, &SymbolLayer::setIconPadding>; - result["icon-keep-upright"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setIconKeepUpright>; - result["icon-offset"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<std::array<float, 2>>, &SymbolLayer::setIconOffset>; - result["icon-anchor"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<SymbolAnchorType>, &SymbolLayer::setIconAnchor>; - result["icon-pitch-alignment"] = &setProperty<V, SymbolLayer, PropertyValue<AlignmentType>, &SymbolLayer::setIconPitchAlignment>; - result["text-pitch-alignment"] = &setProperty<V, SymbolLayer, PropertyValue<AlignmentType>, &SymbolLayer::setTextPitchAlignment>; - result["text-rotation-alignment"] = &setProperty<V, SymbolLayer, PropertyValue<AlignmentType>, &SymbolLayer::setTextRotationAlignment>; - result["text-field"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<std::string>, &SymbolLayer::setTextField>; - result["text-font"] = &setProperty<V, SymbolLayer, PropertyValue<std::vector<std::string>>, &SymbolLayer::setTextFont>; - result["text-size"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setTextSize>; - result["text-max-width"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setTextMaxWidth>; - result["text-line-height"] = &setProperty<V, SymbolLayer, PropertyValue<float>, &SymbolLayer::setTextLineHeight>; - result["text-letter-spacing"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setTextLetterSpacing>; - result["text-justify"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<TextJustifyType>, &SymbolLayer::setTextJustify>; - result["text-anchor"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<SymbolAnchorType>, &SymbolLayer::setTextAnchor>; - result["text-max-angle"] = &setProperty<V, SymbolLayer, PropertyValue<float>, &SymbolLayer::setTextMaxAngle>; - result["text-rotate"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setTextRotate>; - result["text-padding"] = &setProperty<V, SymbolLayer, PropertyValue<float>, &SymbolLayer::setTextPadding>; - result["text-keep-upright"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setTextKeepUpright>; - result["text-transform"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<TextTransformType>, &SymbolLayer::setTextTransform>; - result["text-offset"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<std::array<float, 2>>, &SymbolLayer::setTextOffset>; - result["text-allow-overlap"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setTextAllowOverlap>; - result["text-ignore-placement"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setTextIgnorePlacement>; - result["text-optional"] = &setProperty<V, SymbolLayer, PropertyValue<bool>, &SymbolLayer::setTextOptional>; - - - - - - return result; -} - -template <class V> -auto makePaintPropertySetters() { - std::unordered_map<std::string, PropertySetter<V>> result; - - result["fill-antialias"] = &setProperty<V, FillLayer, PropertyValue<bool>, &FillLayer::setFillAntialias>; - result["fill-antialias-transition"] = &setTransition<V, FillLayer, &FillLayer::setFillAntialiasTransition>; - result["fill-opacity"] = &setProperty<V, FillLayer, DataDrivenPropertyValue<float>, &FillLayer::setFillOpacity>; - result["fill-opacity-transition"] = &setTransition<V, FillLayer, &FillLayer::setFillOpacityTransition>; - result["fill-color"] = &setProperty<V, FillLayer, DataDrivenPropertyValue<Color>, &FillLayer::setFillColor>; - result["fill-color-transition"] = &setTransition<V, FillLayer, &FillLayer::setFillColorTransition>; - result["fill-outline-color"] = &setProperty<V, FillLayer, DataDrivenPropertyValue<Color>, &FillLayer::setFillOutlineColor>; - result["fill-outline-color-transition"] = &setTransition<V, FillLayer, &FillLayer::setFillOutlineColorTransition>; - result["fill-translate"] = &setProperty<V, FillLayer, PropertyValue<std::array<float, 2>>, &FillLayer::setFillTranslate>; - result["fill-translate-transition"] = &setTransition<V, FillLayer, &FillLayer::setFillTranslateTransition>; - result["fill-translate-anchor"] = &setProperty<V, FillLayer, PropertyValue<TranslateAnchorType>, &FillLayer::setFillTranslateAnchor>; - result["fill-translate-anchor-transition"] = &setTransition<V, FillLayer, &FillLayer::setFillTranslateAnchorTransition>; - result["fill-pattern"] = &setProperty<V, FillLayer, PropertyValue<std::string>, &FillLayer::setFillPattern>; - result["fill-pattern-transition"] = &setTransition<V, FillLayer, &FillLayer::setFillPatternTransition>; - - result["line-opacity"] = &setProperty<V, LineLayer, DataDrivenPropertyValue<float>, &LineLayer::setLineOpacity>; - result["line-opacity-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineOpacityTransition>; - result["line-color"] = &setProperty<V, LineLayer, DataDrivenPropertyValue<Color>, &LineLayer::setLineColor>; - result["line-color-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineColorTransition>; - result["line-translate"] = &setProperty<V, LineLayer, PropertyValue<std::array<float, 2>>, &LineLayer::setLineTranslate>; - result["line-translate-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineTranslateTransition>; - result["line-translate-anchor"] = &setProperty<V, LineLayer, PropertyValue<TranslateAnchorType>, &LineLayer::setLineTranslateAnchor>; - result["line-translate-anchor-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineTranslateAnchorTransition>; - result["line-width"] = &setProperty<V, LineLayer, DataDrivenPropertyValue<float>, &LineLayer::setLineWidth>; - result["line-width-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineWidthTransition>; - result["line-gap-width"] = &setProperty<V, LineLayer, DataDrivenPropertyValue<float>, &LineLayer::setLineGapWidth>; - result["line-gap-width-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineGapWidthTransition>; - result["line-offset"] = &setProperty<V, LineLayer, DataDrivenPropertyValue<float>, &LineLayer::setLineOffset>; - result["line-offset-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineOffsetTransition>; - result["line-blur"] = &setProperty<V, LineLayer, DataDrivenPropertyValue<float>, &LineLayer::setLineBlur>; - result["line-blur-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineBlurTransition>; - result["line-dasharray"] = &setProperty<V, LineLayer, PropertyValue<std::vector<float>>, &LineLayer::setLineDasharray>; - result["line-dasharray-transition"] = &setTransition<V, LineLayer, &LineLayer::setLineDasharrayTransition>; - result["line-pattern"] = &setProperty<V, LineLayer, PropertyValue<std::string>, &LineLayer::setLinePattern>; - result["line-pattern-transition"] = &setTransition<V, LineLayer, &LineLayer::setLinePatternTransition>; - - result["icon-opacity"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setIconOpacity>; - result["icon-opacity-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setIconOpacityTransition>; - result["icon-color"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<Color>, &SymbolLayer::setIconColor>; - result["icon-color-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setIconColorTransition>; - result["icon-halo-color"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<Color>, &SymbolLayer::setIconHaloColor>; - result["icon-halo-color-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setIconHaloColorTransition>; - result["icon-halo-width"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setIconHaloWidth>; - result["icon-halo-width-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setIconHaloWidthTransition>; - result["icon-halo-blur"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setIconHaloBlur>; - result["icon-halo-blur-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setIconHaloBlurTransition>; - result["icon-translate"] = &setProperty<V, SymbolLayer, PropertyValue<std::array<float, 2>>, &SymbolLayer::setIconTranslate>; - result["icon-translate-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setIconTranslateTransition>; - result["icon-translate-anchor"] = &setProperty<V, SymbolLayer, PropertyValue<TranslateAnchorType>, &SymbolLayer::setIconTranslateAnchor>; - result["icon-translate-anchor-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setIconTranslateAnchorTransition>; - result["text-opacity"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setTextOpacity>; - result["text-opacity-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setTextOpacityTransition>; - result["text-color"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<Color>, &SymbolLayer::setTextColor>; - result["text-color-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setTextColorTransition>; - result["text-halo-color"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<Color>, &SymbolLayer::setTextHaloColor>; - result["text-halo-color-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setTextHaloColorTransition>; - result["text-halo-width"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setTextHaloWidth>; - result["text-halo-width-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setTextHaloWidthTransition>; - result["text-halo-blur"] = &setProperty<V, SymbolLayer, DataDrivenPropertyValue<float>, &SymbolLayer::setTextHaloBlur>; - result["text-halo-blur-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setTextHaloBlurTransition>; - result["text-translate"] = &setProperty<V, SymbolLayer, PropertyValue<std::array<float, 2>>, &SymbolLayer::setTextTranslate>; - result["text-translate-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setTextTranslateTransition>; - result["text-translate-anchor"] = &setProperty<V, SymbolLayer, PropertyValue<TranslateAnchorType>, &SymbolLayer::setTextTranslateAnchor>; - result["text-translate-anchor-transition"] = &setTransition<V, SymbolLayer, &SymbolLayer::setTextTranslateAnchorTransition>; - - result["circle-radius"] = &setProperty<V, CircleLayer, DataDrivenPropertyValue<float>, &CircleLayer::setCircleRadius>; - result["circle-radius-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleRadiusTransition>; - result["circle-color"] = &setProperty<V, CircleLayer, DataDrivenPropertyValue<Color>, &CircleLayer::setCircleColor>; - result["circle-color-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleColorTransition>; - result["circle-blur"] = &setProperty<V, CircleLayer, DataDrivenPropertyValue<float>, &CircleLayer::setCircleBlur>; - result["circle-blur-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleBlurTransition>; - result["circle-opacity"] = &setProperty<V, CircleLayer, DataDrivenPropertyValue<float>, &CircleLayer::setCircleOpacity>; - result["circle-opacity-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleOpacityTransition>; - result["circle-translate"] = &setProperty<V, CircleLayer, PropertyValue<std::array<float, 2>>, &CircleLayer::setCircleTranslate>; - result["circle-translate-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleTranslateTransition>; - result["circle-translate-anchor"] = &setProperty<V, CircleLayer, PropertyValue<TranslateAnchorType>, &CircleLayer::setCircleTranslateAnchor>; - result["circle-translate-anchor-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleTranslateAnchorTransition>; - result["circle-pitch-scale"] = &setProperty<V, CircleLayer, PropertyValue<CirclePitchScaleType>, &CircleLayer::setCirclePitchScale>; - result["circle-pitch-scale-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCirclePitchScaleTransition>; - result["circle-pitch-alignment"] = &setProperty<V, CircleLayer, PropertyValue<AlignmentType>, &CircleLayer::setCirclePitchAlignment>; - result["circle-pitch-alignment-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCirclePitchAlignmentTransition>; - result["circle-stroke-width"] = &setProperty<V, CircleLayer, DataDrivenPropertyValue<float>, &CircleLayer::setCircleStrokeWidth>; - result["circle-stroke-width-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleStrokeWidthTransition>; - result["circle-stroke-color"] = &setProperty<V, CircleLayer, DataDrivenPropertyValue<Color>, &CircleLayer::setCircleStrokeColor>; - result["circle-stroke-color-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleStrokeColorTransition>; - result["circle-stroke-opacity"] = &setProperty<V, CircleLayer, DataDrivenPropertyValue<float>, &CircleLayer::setCircleStrokeOpacity>; - result["circle-stroke-opacity-transition"] = &setTransition<V, CircleLayer, &CircleLayer::setCircleStrokeOpacityTransition>; - - result["fill-extrusion-opacity"] = &setProperty<V, FillExtrusionLayer, PropertyValue<float>, &FillExtrusionLayer::setFillExtrusionOpacity>; - result["fill-extrusion-opacity-transition"] = &setTransition<V, FillExtrusionLayer, &FillExtrusionLayer::setFillExtrusionOpacityTransition>; - result["fill-extrusion-color"] = &setProperty<V, FillExtrusionLayer, DataDrivenPropertyValue<Color>, &FillExtrusionLayer::setFillExtrusionColor>; - result["fill-extrusion-color-transition"] = &setTransition<V, FillExtrusionLayer, &FillExtrusionLayer::setFillExtrusionColorTransition>; - result["fill-extrusion-translate"] = &setProperty<V, FillExtrusionLayer, PropertyValue<std::array<float, 2>>, &FillExtrusionLayer::setFillExtrusionTranslate>; - result["fill-extrusion-translate-transition"] = &setTransition<V, FillExtrusionLayer, &FillExtrusionLayer::setFillExtrusionTranslateTransition>; - result["fill-extrusion-translate-anchor"] = &setProperty<V, FillExtrusionLayer, PropertyValue<TranslateAnchorType>, &FillExtrusionLayer::setFillExtrusionTranslateAnchor>; - result["fill-extrusion-translate-anchor-transition"] = &setTransition<V, FillExtrusionLayer, &FillExtrusionLayer::setFillExtrusionTranslateAnchorTransition>; - result["fill-extrusion-pattern"] = &setProperty<V, FillExtrusionLayer, PropertyValue<std::string>, &FillExtrusionLayer::setFillExtrusionPattern>; - result["fill-extrusion-pattern-transition"] = &setTransition<V, FillExtrusionLayer, &FillExtrusionLayer::setFillExtrusionPatternTransition>; - result["fill-extrusion-height"] = &setProperty<V, FillExtrusionLayer, DataDrivenPropertyValue<float>, &FillExtrusionLayer::setFillExtrusionHeight>; - result["fill-extrusion-height-transition"] = &setTransition<V, FillExtrusionLayer, &FillExtrusionLayer::setFillExtrusionHeightTransition>; - result["fill-extrusion-base"] = &setProperty<V, FillExtrusionLayer, DataDrivenPropertyValue<float>, &FillExtrusionLayer::setFillExtrusionBase>; - result["fill-extrusion-base-transition"] = &setTransition<V, FillExtrusionLayer, &FillExtrusionLayer::setFillExtrusionBaseTransition>; - - result["raster-opacity"] = &setProperty<V, RasterLayer, PropertyValue<float>, &RasterLayer::setRasterOpacity>; - result["raster-opacity-transition"] = &setTransition<V, RasterLayer, &RasterLayer::setRasterOpacityTransition>; - result["raster-hue-rotate"] = &setProperty<V, RasterLayer, PropertyValue<float>, &RasterLayer::setRasterHueRotate>; - result["raster-hue-rotate-transition"] = &setTransition<V, RasterLayer, &RasterLayer::setRasterHueRotateTransition>; - result["raster-brightness-min"] = &setProperty<V, RasterLayer, PropertyValue<float>, &RasterLayer::setRasterBrightnessMin>; - result["raster-brightness-min-transition"] = &setTransition<V, RasterLayer, &RasterLayer::setRasterBrightnessMinTransition>; - result["raster-brightness-max"] = &setProperty<V, RasterLayer, PropertyValue<float>, &RasterLayer::setRasterBrightnessMax>; - result["raster-brightness-max-transition"] = &setTransition<V, RasterLayer, &RasterLayer::setRasterBrightnessMaxTransition>; - result["raster-saturation"] = &setProperty<V, RasterLayer, PropertyValue<float>, &RasterLayer::setRasterSaturation>; - result["raster-saturation-transition"] = &setTransition<V, RasterLayer, &RasterLayer::setRasterSaturationTransition>; - result["raster-contrast"] = &setProperty<V, RasterLayer, PropertyValue<float>, &RasterLayer::setRasterContrast>; - result["raster-contrast-transition"] = &setTransition<V, RasterLayer, &RasterLayer::setRasterContrastTransition>; - result["raster-fade-duration"] = &setProperty<V, RasterLayer, PropertyValue<float>, &RasterLayer::setRasterFadeDuration>; - result["raster-fade-duration-transition"] = &setTransition<V, RasterLayer, &RasterLayer::setRasterFadeDurationTransition>; - - result["background-color"] = &setProperty<V, BackgroundLayer, PropertyValue<Color>, &BackgroundLayer::setBackgroundColor>; - result["background-color-transition"] = &setTransition<V, BackgroundLayer, &BackgroundLayer::setBackgroundColorTransition>; - result["background-pattern"] = &setProperty<V, BackgroundLayer, PropertyValue<std::string>, &BackgroundLayer::setBackgroundPattern>; - result["background-pattern-transition"] = &setTransition<V, BackgroundLayer, &BackgroundLayer::setBackgroundPatternTransition>; - result["background-opacity"] = &setProperty<V, BackgroundLayer, PropertyValue<float>, &BackgroundLayer::setBackgroundOpacity>; - result["background-opacity-transition"] = &setTransition<V, BackgroundLayer, &BackgroundLayer::setBackgroundOpacityTransition>; - - return result; -} - -} // namespace conversion -} // namespace style -} // namespace mbgl diff --git a/include/mbgl/style/conversion/make_property_setters.hpp.ejs b/include/mbgl/style/conversion/make_property_setters.hpp.ejs deleted file mode 100644 index 19c9f70538..0000000000 --- a/include/mbgl/style/conversion/make_property_setters.hpp.ejs +++ /dev/null @@ -1,48 +0,0 @@ -#pragma once - -// This file is generated. Edit make_property_setters.hpp.ejs, then run `make style-code`. - -#include <mbgl/style/conversion/property_setter.hpp> - -<% for (const layer of locals.layers) { -%> -#include <mbgl/style/layers/<%- layer.type.replace('-', '_') %>_layer.hpp> -<% } -%> - -#include <unordered_map> - -namespace mbgl { -namespace style { -namespace conversion { - -template <class V> -auto makeLayoutPropertySetters() { - std::unordered_map<std::string, PropertySetter<V>> result; - - result["visibility"] = &setVisibility<V>; - -<% for (const layer of locals.layers) { -%> -<% for (const property of layer.layoutProperties) { -%> - result["<%- property.name %>"] = &setProperty<V, <%- camelize(layer.type) %>Layer, <%- propertyValueType(property) %>, &<%- camelize(layer.type) %>Layer::set<%- camelize(property.name) %>>; -<% } -%> - -<% } -%> - return result; -} - -template <class V> -auto makePaintPropertySetters() { - std::unordered_map<std::string, PropertySetter<V>> result; - -<% for (const layer of locals.layers) { -%> -<% for (const property of layer.paintProperties) { -%> - result["<%- property.name %>"] = &setProperty<V, <%- camelize(layer.type) %>Layer, <%- propertyValueType(property) %>, &<%- camelize(layer.type) %>Layer::set<%- camelize(property.name) %>>; - result["<%- property.name %>-transition"] = &setTransition<V, <%- camelize(layer.type) %>Layer, &<%- camelize(layer.type) %>Layer::set<%- camelize(property.name) %>Transition>; -<% } -%> - -<% } -%> - return result; -} - -} // namespace conversion -} // namespace style -} // namespace mbgl diff --git a/include/mbgl/style/conversion/position.hpp b/include/mbgl/style/conversion/position.hpp index 7036b03822..044c45862d 100644 --- a/include/mbgl/style/conversion/position.hpp +++ b/include/mbgl/style/conversion/position.hpp @@ -2,9 +2,6 @@ #include <mbgl/style/conversion.hpp> #include <mbgl/style/position.hpp> -#include <mbgl/util/optional.hpp> - -#include <array> namespace mbgl { namespace style { @@ -12,16 +9,7 @@ namespace conversion { template <> struct Converter<Position> { - template <class V> - optional<Position> operator()(const V& value, Error& error) const { - optional<std::array<float, 3>> spherical = convert<std::array<float, 3>>(value, error); - - if (!spherical) { - return {}; - } - - return Position(*spherical); - } + optional<Position> operator()(const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/property_setter.hpp b/include/mbgl/style/conversion/property_setter.hpp deleted file mode 100644 index 759c4512cc..0000000000 --- a/include/mbgl/style/conversion/property_setter.hpp +++ /dev/null @@ -1,72 +0,0 @@ -#pragma once - -#include <mbgl/style/layer.hpp> -#include <mbgl/style/conversion.hpp> -#include <mbgl/style/conversion/constant.hpp> -#include <mbgl/style/conversion/property_value.hpp> -#include <mbgl/style/conversion/data_driven_property_value.hpp> -#include <mbgl/style/conversion/transition_options.hpp> - -#include <string> - -namespace mbgl { -namespace style { -namespace conversion { - -template <class V> -using PropertySetter = optional<Error> (*) (Layer&, const V&); - -template <class V, class L, class PropertyValue, void (L::*setter)(PropertyValue)> -optional<Error> setProperty(Layer& layer, const V& value) { - auto* typedLayer = layer.as<L>(); - if (!typedLayer) { - return Error { "layer doesn't support this property" }; - } - - Error error; - optional<PropertyValue> typedValue = convert<PropertyValue>(value, error); - if (!typedValue) { - return error; - } - - (typedLayer->*setter)(*typedValue); - return {}; -} - -template <class V, class L, void (L::*setter)(const TransitionOptions&)> -optional<Error> setTransition(Layer& layer, const V& value) { - auto* typedLayer = layer.as<L>(); - if (!typedLayer) { - return Error { "layer doesn't support this property" }; - } - - Error error; - optional<TransitionOptions> transition = convert<TransitionOptions>(value, error); - if (!transition) { - return error; - } - - (typedLayer->*setter)(*transition); - return {}; -} - -template <class V> -optional<Error> setVisibility(Layer& layer, const V& value) { - if (isUndefined(value)) { - layer.setVisibility(VisibilityType::Visible); - return {}; - } - - Error error; - optional<VisibilityType> visibility = convert<VisibilityType>(value, error); - if (!visibility) { - return error; - } - - layer.setVisibility(*visibility); - return {}; -} - -} // namespace conversion -} // namespace style -} // namespace mbgl diff --git a/include/mbgl/style/conversion/property_value.hpp b/include/mbgl/style/conversion/property_value.hpp index f8937da07d..97117de2ec 100644 --- a/include/mbgl/style/conversion/property_value.hpp +++ b/include/mbgl/style/conversion/property_value.hpp @@ -4,6 +4,11 @@ #include <mbgl/style/conversion.hpp> #include <mbgl/style/conversion/constant.hpp> #include <mbgl/style/conversion/function.hpp> +#include <mbgl/style/conversion/expression.hpp> +#include <mbgl/style/expression/value.hpp> +#include <mbgl/style/expression/is_constant.hpp> +#include <mbgl/style/expression/is_expression.hpp> +#include <mbgl/style/expression/find_zoom_curve.hpp> namespace mbgl { namespace style { @@ -11,10 +16,20 @@ namespace conversion { template <class T> struct Converter<PropertyValue<T>> { - template <class V> - optional<PropertyValue<T>> operator()(const V& value, Error& error) const { + optional<PropertyValue<T>> operator()(const Convertible& value, Error& error) const { if (isUndefined(value)) { return PropertyValue<T>(); + } else if (isExpression(value)) { + optional<std::unique_ptr<Expression>> expression = convert<std::unique_ptr<Expression>>(value, error, valueTypeToExpressionType<T>()); + if (!expression) { + return {}; + } + if (isFeatureConstant(**expression)) { + return { CameraFunction<T>(std::move(*expression)) }; + } else { + error = { "property expressions not supported" }; + return {}; + } } else if (isObject(value)) { optional<CameraFunction<T>> function = convert<CameraFunction<T>>(value, error); if (!function) { diff --git a/include/mbgl/style/conversion/source.hpp b/include/mbgl/style/conversion/source.hpp index e0563ac10b..2cf2e36da4 100644 --- a/include/mbgl/style/conversion/source.hpp +++ b/include/mbgl/style/conversion/source.hpp @@ -1,16 +1,9 @@ #pragma once #include <mbgl/style/conversion.hpp> -#include <mbgl/style/conversion/coordinate.hpp> -#include <mbgl/style/conversion/geojson.hpp> -#include <mbgl/style/conversion/geojson_options.hpp> -#include <mbgl/style/conversion/tileset.hpp> #include <mbgl/style/source.hpp> -#include <mbgl/style/sources/geojson_source.hpp> -#include <mbgl/style/sources/raster_source.hpp> -#include <mbgl/style/sources/vector_source.hpp> -#include <mbgl/style/sources/image_source.hpp> -#include <mbgl/util/geo.hpp> + +#include <memory> namespace mbgl { namespace style { @@ -19,170 +12,7 @@ namespace conversion { template <> struct Converter<std::unique_ptr<Source>> { public: - - template <class V> - optional<std::unique_ptr<Source>> operator()(const V& value, Error& error, const std::string& id) const { - if (!isObject(value)) { - error = { "source must be an object" }; - return {}; - } - - auto typeValue = objectMember(value, "type"); - if (!typeValue) { - error = { "source must have a type" }; - return {}; - } - - optional<std::string> type = toString(*typeValue); - if (!type) { - error = { "source type must be a string" }; - return {}; - } - - if (*type == "raster") { - return convertRasterSource(id, value, error); - } else if (*type == "vector") { - return convertVectorSource(id, value, error); - } else if (*type == "geojson") { - return convertGeoJSONSource(id, value, error); - } else if (*type == "image") { - return convertImageSource(id, value, error); - } else { - error = { "invalid source type" }; - return {}; - } - } - -private: - // A tile source can either specify a URL to TileJSON, or inline TileJSON. - template <class V> - optional<variant<std::string, Tileset>> convertURLOrTileset(const V& value, Error& error) const { - auto urlVal = objectMember(value, "url"); - if (!urlVal) { - optional<Tileset> tileset = convert<Tileset>(value, error); - if (!tileset) { - return {}; - } - return { *tileset }; - } - - optional<std::string> url = toString(*urlVal); - if (!url) { - error = { "source url must be a string" }; - return {}; - } - - return { *url }; - } - - template <class V> - optional<std::unique_ptr<Source>> convertRasterSource(const std::string& id, - const V& value, - Error& error) const { - optional<variant<std::string, Tileset>> urlOrTileset = convertURLOrTileset(value, error); - if (!urlOrTileset) { - return {}; - } - - uint16_t tileSize = util::tileSize; - auto tileSizeValue = objectMember(value, "tileSize"); - if (tileSizeValue) { - optional<float> size = toNumber(*tileSizeValue); - if (!size || *size < 0 || *size > std::numeric_limits<uint16_t>::max()) { - error = { "invalid tileSize" }; - return {}; - } - tileSize = *size; - } - - return { std::make_unique<RasterSource>(id, std::move(*urlOrTileset), tileSize) }; - } - - template <class V> - optional<std::unique_ptr<Source>> convertVectorSource(const std::string& id, - const V& value, - Error& error) const { - optional<variant<std::string, Tileset>> urlOrTileset = convertURLOrTileset(value, error); - if (!urlOrTileset) { - return {}; - } - - return { std::make_unique<VectorSource>(id, std::move(*urlOrTileset)) }; - } - - template <class V> - optional<std::unique_ptr<Source>> convertGeoJSONSource(const std::string& id, - const V& value, - Error& error) const { - auto dataValue = objectMember(value, "data"); - if (!dataValue) { - error = { "GeoJSON source must have a data value" }; - return {}; - } - - optional<GeoJSONOptions> options = convert<GeoJSONOptions>(value, error); - if (!options) { - return {}; - } - - auto result = std::make_unique<GeoJSONSource>(id, *options); - - if (isObject(*dataValue)) { - optional<GeoJSON> geoJSON = convert<GeoJSON>(*dataValue, error); - if (!geoJSON) { - return {}; - } - result->setGeoJSON(std::move(*geoJSON)); - } else if (toString(*dataValue)) { - result->setURL(*toString(*dataValue)); - } else { - error = { "GeoJSON data must be a URL or an object" }; - return {}; - } - - return { std::move(result) }; - } - - template <class V> - optional<std::unique_ptr<Source>> convertImageSource(const std::string& id, - const V& value, - Error& error) const { - auto urlValue = objectMember(value, "url"); - if (!urlValue) { - error = { "Image source must have a url value" }; - return {}; - } - - auto urlString = toString(*urlValue); - if (!urlString) { - error = { "Image url must be a URL string" }; - return {}; - } - - auto coordinatesValue = objectMember(value, "coordinates"); - if (!coordinatesValue) { - error = { "Image source must have a coordinates values" }; - return {}; - } - - if (!isArray(*coordinatesValue) || arrayLength(*coordinatesValue) != 4) { - error = { "Image coordinates must be an array of four longitude latitude pairs" }; - return {}; - } - - std::array<LatLng, 4> coordinates; - for (std::size_t i=0; i < 4; i++) { - auto latLng = conversion::convert<LatLng>(arrayMember(*coordinatesValue,i), error); - if (!latLng) { - return {}; - } - coordinates[i] = *latLng; - } - auto result = std::make_unique<ImageSource>(id, coordinates); - result->setURL(*urlString); - - return { std::move(result) }; - } + optional<std::unique_ptr<Source>> operator()(const Convertible& value, Error& error, const std::string& id) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/tileset.hpp b/include/mbgl/style/conversion/tileset.hpp index 6ec46aa7b6..1fb4acf70d 100644 --- a/include/mbgl/style/conversion/tileset.hpp +++ b/include/mbgl/style/conversion/tileset.hpp @@ -10,101 +10,7 @@ namespace conversion { template <> struct Converter<Tileset> { public: - - bool validateLatitude(const double lat) const { - return lat <= 90 && lat >= -90; - } - - template <class V> - optional<Tileset> operator()(const V& value, Error& error) const { - Tileset result; - - auto tiles = objectMember(value, "tiles"); - if (!tiles) { - error = { "source must have tiles" }; - return {}; - } - - if (!isArray(*tiles)) { - error = { "source tiles must be an array" }; - return {}; - } - - for (std::size_t i = 0; i < arrayLength(*tiles); i++) { - optional<std::string> urlTemplate = toString(arrayMember(*tiles, i)); - if (!urlTemplate) { - error = { "source tiles member must be a string" }; - return {}; - } - result.tiles.push_back(std::move(*urlTemplate)); - } - - auto schemeValue = objectMember(value, "scheme"); - if (schemeValue) { - optional<std::string> scheme = toString(*schemeValue); - if (scheme && *scheme == "tms") { - result.scheme = Tileset::Scheme::TMS; - } - } - - auto minzoomValue = objectMember(value, "minzoom"); - if (minzoomValue) { - optional<float> minzoom = toNumber(*minzoomValue); - if (!minzoom || *minzoom < 0 || *minzoom > std::numeric_limits<uint8_t>::max()) { - error = { "invalid minzoom" }; - return {}; - } - result.zoomRange.min = *minzoom; - } - - auto maxzoomValue = objectMember(value, "maxzoom"); - if (maxzoomValue) { - optional<float> maxzoom = toNumber(*maxzoomValue); - if (!maxzoom || *maxzoom < 0 || *maxzoom > std::numeric_limits<uint8_t>::max()) { - error = { "invalid maxzoom" }; - return {}; - } - result.zoomRange.max = *maxzoom; - } - - auto attributionValue = objectMember(value, "attribution"); - if (attributionValue) { - optional<std::string> attribution = toString(*attributionValue); - if (!attribution) { - error = { "source attribution must be a string" }; - return {}; - } - result.attribution = std::move(*attribution); - } - - auto boundsValue = objectMember(value, "bounds"); - if (boundsValue) { - if (!isArray(*boundsValue) || arrayLength(*boundsValue) != 4) { - error = { "bounds must be an array with left, bottom, top, and right values" }; - return {}; - } - optional<double> left = toDouble(arrayMember(*boundsValue, 0)); - optional<double> bottom = toDouble(arrayMember(*boundsValue, 1)); - optional<double> right = toDouble(arrayMember(*boundsValue, 2)); - optional<double> top = toDouble(arrayMember(*boundsValue, 3)); - - if (!left || !right || !bottom || !top) { - error = { "bounds array must contain numeric longitude and latitude values" }; - return {}; - } - if (!validateLatitude(*bottom) || !validateLatitude(*top) || top <= bottom){ - error = { "bounds latitude values must be between -90 and 90 with bottom less than top" }; - return {}; - } - if(*left >= *right) { - error = { "bounds left longitude should be less than right longitude" }; - return {}; - } - result.bounds = LatLngBounds::hull({ *bottom, *left }, { *top, *right }); - } - - return result; - } + optional<Tileset> operator()(const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/conversion/transition_options.hpp b/include/mbgl/style/conversion/transition_options.hpp index de8834d578..0563f39ac3 100644 --- a/include/mbgl/style/conversion/transition_options.hpp +++ b/include/mbgl/style/conversion/transition_options.hpp @@ -10,37 +10,7 @@ namespace conversion { template <> struct Converter<TransitionOptions> { public: - template <class V> - optional<TransitionOptions> operator()(const V& value, Error& error) const { - if (!isObject(value)) { - error = { "transition must be an object" }; - return {}; - } - - TransitionOptions result; - - auto duration = objectMember(value, "duration"); - if (duration) { - auto number = toNumber(*duration); - if (!number) { - error = { "duration must be a number" }; - return {}; - } - result.duration = { std::chrono::milliseconds(int64_t(*number)) }; - } - - auto delay = objectMember(value, "delay"); - if (delay) { - auto number = toNumber(*delay); - if (!number) { - error = { "delay must be a number" }; - return {}; - } - result.delay = { std::chrono::milliseconds(int64_t(*number)) }; - } - - return result; - } + optional<TransitionOptions> operator()(const Convertible& value, Error& error) const; }; } // namespace conversion diff --git a/include/mbgl/style/expression/array_assertion.hpp b/include/mbgl/style/expression/array_assertion.hpp new file mode 100644 index 0000000000..7f36f8aac2 --- /dev/null +++ b/include/mbgl/style/expression/array_assertion.hpp @@ -0,0 +1,43 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/type.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { + +class ArrayAssertion : public Expression { +public: + ArrayAssertion(type::Array type_, std::unique_ptr<Expression> input_) : + Expression(type_), + input(std::move(input_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>& visit) const override; + + bool operator==(const Expression& e) const override { + if (auto rhs = dynamic_cast<const ArrayAssertion*>(&e)) { + return getType() == rhs->getType() && *input == *(rhs->input); + } + return false; + } + + std::vector<optional<Value>> possibleOutputs() const override { + return input->possibleOutputs(); + } + +private: + std::unique_ptr<Expression> input; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/assertion.hpp b/include/mbgl/style/expression/assertion.hpp new file mode 100644 index 0000000000..43ea73f2ba --- /dev/null +++ b/include/mbgl/style/expression/assertion.hpp @@ -0,0 +1,36 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> +#include <mbgl/style/expression/parsing_context.hpp> + +#include <memory> +#include <vector> + +namespace mbgl { +namespace style { +namespace expression { + +class Assertion : public Expression { +public: + Assertion(type::Type type_, std::vector<std::unique_ptr<Expression>> inputs_) : + Expression(type_), + inputs(std::move(inputs_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>& visit) const override; + + bool operator==(const Expression& e) const override; + + std::vector<optional<Value>> possibleOutputs() const override; + +private: + std::vector<std::unique_ptr<Expression>> inputs; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/at.hpp b/include/mbgl/style/expression/at.hpp new file mode 100644 index 0000000000..27fccc761f --- /dev/null +++ b/include/mbgl/style/expression/at.hpp @@ -0,0 +1,42 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { + +class At : public Expression { +public: + At(std::unique_ptr<Expression> index_, std::unique_ptr<Expression> input_) : + Expression(input_->getType().get<type::Array>().itemType), + index(std::move(index_)), + input(std::move(input_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>&) const override; + + bool operator==(const Expression& e) const override { + if (auto rhs = dynamic_cast<const At*>(&e)) { + return *index == *(rhs->index) && *input == *(rhs->input); + } + return false; + } + + std::vector<optional<Value>> possibleOutputs() const override { + return { nullopt }; + } + +private: + std::unique_ptr<Expression> index; + std::unique_ptr<Expression> input; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/boolean_operator.hpp b/include/mbgl/style/expression/boolean_operator.hpp new file mode 100644 index 0000000000..115a096665 --- /dev/null +++ b/include/mbgl/style/expression/boolean_operator.hpp @@ -0,0 +1,50 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { + +class Any : public Expression { +public: + Any(std::vector<std::unique_ptr<Expression>> inputs_) : + Expression(type::Boolean), + inputs(std::move(inputs_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>& visit) const override; + bool operator==(const Expression& e) const override; + std::vector<optional<Value>> possibleOutputs() const override; + +private: + std::vector<std::unique_ptr<Expression>> inputs; +}; + +class All : public Expression { +public: + All(std::vector<std::unique_ptr<Expression>> inputs_) : + Expression(type::Boolean), + inputs(std::move(inputs_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>& visit) const override; + bool operator==(const Expression& e) const override; + std::vector<optional<Value>> possibleOutputs() const override; + +private: + std::vector<std::unique_ptr<Expression>> inputs; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/case.hpp b/include/mbgl/style/expression/case.hpp new file mode 100644 index 0000000000..e61a55fc6d --- /dev/null +++ b/include/mbgl/style/expression/case.hpp @@ -0,0 +1,38 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> +#include <mbgl/style/expression/parsing_context.hpp> + +#include <memory> +#include <vector> + +namespace mbgl { +namespace style { +namespace expression { + +class Case : public Expression { +public: + using Branch = std::pair<std::unique_ptr<Expression>, std::unique_ptr<Expression>>; + + Case(type::Type type_, std::vector<Branch> branches_, std::unique_ptr<Expression> otherwise_) + : Expression(type_), branches(std::move(branches_)), otherwise(std::move(otherwise_)) { + } + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>& visit) const override; + + bool operator==(const Expression& e) const override; + + std::vector<optional<Value>> possibleOutputs() const override; + +private: + std::vector<Branch> branches; + std::unique_ptr<Expression> otherwise; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/check_subtype.hpp b/include/mbgl/style/expression/check_subtype.hpp new file mode 100644 index 0000000000..90e5169de7 --- /dev/null +++ b/include/mbgl/style/expression/check_subtype.hpp @@ -0,0 +1,17 @@ +#pragma once + +#include <mbgl/style/expression/type.hpp> +#include <mbgl/util/optional.hpp> +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { +namespace type { + +optional<std::string> checkSubtype(const Type& expected, const Type& t); + +} // namespace type +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/coalesce.hpp b/include/mbgl/style/expression/coalesce.hpp new file mode 100644 index 0000000000..52d9498cbd --- /dev/null +++ b/include/mbgl/style/expression/coalesce.hpp @@ -0,0 +1,47 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> +#include <mbgl/style/expression/parsing_context.hpp> + +#include <memory> +#include <map> + +namespace mbgl { +namespace style { +namespace expression { + +class Coalesce : public Expression { +public: + using Args = std::vector<std::unique_ptr<Expression>>; + Coalesce(const type::Type& type_, Args args_) : + Expression(type_), + args(std::move(args_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + + EvaluationResult evaluate(const EvaluationContext& params) const override; + + void eachChild(const std::function<void(const Expression&)>& visit) const override; + + bool operator==(const Expression& e) const override; + + std::vector<optional<Value>> possibleOutputs() const override; + + std::size_t getLength() const { + return args.size(); + } + + Expression* getChild(std::size_t i) const { + return args.at(i).get(); + } + +private: + Args args; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/coercion.hpp b/include/mbgl/style/expression/coercion.hpp new file mode 100644 index 0000000000..40d2490186 --- /dev/null +++ b/include/mbgl/style/expression/coercion.hpp @@ -0,0 +1,39 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> +#include <vector> + +namespace mbgl { +namespace style { +namespace expression { + +/** + * Special form for error-coalescing coercion expressions "to-number", + * "to-color". Since these coercions can fail at runtime, they accept multiple + * arguments, only evaluating one at a time until one succeeds. + */ +class Coercion : public Expression { +public: + Coercion(type::Type type_, std::vector<std::unique_ptr<Expression>> inputs_); + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>& visit) const override; + + bool operator==(const Expression& e) const override; + + std::vector<optional<Value>> possibleOutputs() const override; + +private: + EvaluationResult (*coerceSingleValue) (const Value& v); + std::vector<std::unique_ptr<Expression>> inputs; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl + diff --git a/include/mbgl/style/expression/compound_expression.hpp b/include/mbgl/style/expression/compound_expression.hpp new file mode 100644 index 0000000000..8b74027578 --- /dev/null +++ b/include/mbgl/style/expression/compound_expression.hpp @@ -0,0 +1,142 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/expression/type.hpp> +#include <mbgl/style/expression/value.hpp> + +#include <mbgl/util/optional.hpp> +#include <mbgl/util/variant.hpp> + +#include <memory> +#include <vector> + +namespace mbgl { +namespace style { +namespace expression { + +/* + CompoundExpression provides a mechanism for implementing an expression + simply by providing a list of pure functions of the form + (const T0& arg0, const T1& arg1, ...) -> Result<U> where T0, T1, ..., U are + member types of mbgl::style::expression::Value. + + The majority of expressions specified in the style-spec are implemented in + this fashion (see compound_expression.cpp). +*/ + + +/* + Represents the parameter list for an expression that takes an arbitrary + number of arguments (of a specific type). +*/ +struct VarargsType { type::Type type; }; +template <typename T> +struct Varargs : std::vector<T> { using std::vector<T>::vector; }; + +namespace detail { +// Base class for the Signature<Fn> structs that are used to determine the +// each CompoundExpression definition's type::Type data from the type of its +// "evaluate" function. +struct SignatureBase { + SignatureBase(type::Type result_, variant<std::vector<type::Type>, VarargsType> params_) : + result(std::move(result_)), + params(std::move(params_)) + {} + virtual ~SignatureBase() = default; + virtual std::unique_ptr<Expression> makeExpression(const std::string& name, std::vector<std::unique_ptr<Expression>>) const = 0; + type::Type result; + variant<std::vector<type::Type>, VarargsType> params; +}; +} // namespace detail + + +/* + Common base class for CompoundExpression<Signature> instances. Used to + allow downcasting (and access to things like name & parameter list) during + an Expression tree traversal. +*/ +class CompoundExpressionBase : public Expression { +public: + CompoundExpressionBase(std::string name_, const detail::SignatureBase& signature) : + Expression(signature.result), + name(std::move(name_)), + params(signature.params) + {} + + std::string getName() const { return name; } + optional<std::size_t> getParameterCount() const { + return params.match( + [&](const VarargsType&) { return optional<std::size_t>(); }, + [&](const std::vector<type::Type>& p) -> optional<std::size_t> { return p.size(); } + ); + } + + std::vector<optional<Value>> possibleOutputs() const override { + return { nullopt }; + } + +private: + std::string name; + variant<std::vector<type::Type>, VarargsType> params; +}; + +template <typename Signature> +class CompoundExpression : public CompoundExpressionBase { +public: + using Args = typename Signature::Args; + + CompoundExpression(const std::string& name_, + Signature signature_, + typename Signature::Args args_) : + CompoundExpressionBase(name_, signature_), + signature(signature_), + args(std::move(args_)) + {} + + EvaluationResult evaluate(const EvaluationContext& evaluationParams) const override { + return signature.apply(evaluationParams, args); + } + + void eachChild(const std::function<void(const Expression&)>& visit) const override { + for (const std::unique_ptr<Expression>& e : args) { + visit(*e); + } + } + + bool operator==(const Expression& e) const override { + if (auto rhs = dynamic_cast<const CompoundExpression*>(&e)) { + return getName() == rhs->getName() && Expression::childrenEqual(args, rhs->args); + } + return false; + } + +private: + Signature signature; + typename Signature::Args args; +}; + +/* + Holds the map of expression name => implementation (which is just one or + more evaluation functions, each wrapped in a Signature struct). +*/ +struct CompoundExpressionRegistry { + using Definition = std::vector<std::unique_ptr<detail::SignatureBase>>; + static std::unordered_map<std::string, Definition> definitions; +}; + +ParseResult parseCompoundExpression(const std::string name, const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + +ParseResult createCompoundExpression(const std::string& name, + const CompoundExpressionRegistry::Definition& definition, + std::vector<std::unique_ptr<Expression>> args, + ParsingContext& ctx); + +ParseResult createCompoundExpression(const std::string& name, + std::vector<std::unique_ptr<Expression>> args, + ParsingContext& ctx); + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/equals.hpp b/include/mbgl/style/expression/equals.hpp new file mode 100644 index 0000000000..80550bd59d --- /dev/null +++ b/include/mbgl/style/expression/equals.hpp @@ -0,0 +1,32 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { + +class Equals : public Expression { +public: + Equals(std::unique_ptr<Expression> lhs, std::unique_ptr<Expression> rhs, bool negate); + + static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&); + + void eachChild(const std::function<void(const Expression&)>& visit) const override; + bool operator==(const Expression&) const override; + EvaluationResult evaluate(const EvaluationContext&) const override; + std::vector<optional<Value>> possibleOutputs() const override; + +private: + std::unique_ptr<Expression> lhs; + std::unique_ptr<Expression> rhs; + bool negate; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/expression.hpp b/include/mbgl/style/expression/expression.hpp new file mode 100644 index 0000000000..cf9fa0cb21 --- /dev/null +++ b/include/mbgl/style/expression/expression.hpp @@ -0,0 +1,179 @@ +#pragma once + +#include <mbgl/util/optional.hpp> +#include <mbgl/util/variant.hpp> +#include <mbgl/util/color.hpp> +#include <mbgl/style/expression/type.hpp> +#include <mbgl/style/expression/value.hpp> +#include <mbgl/style/expression/parsing_context.hpp> + +#include <array> +#include <vector> +#include <memory> + +namespace mbgl { + +class GeometryTileFeature; + +namespace style { +namespace expression { + +class EvaluationError { +public: + std::string message; +}; + +class EvaluationContext { +public: + EvaluationContext(float zoom_) : zoom(zoom_), feature(nullptr) {} + EvaluationContext(GeometryTileFeature const * feature_) : zoom(optional<float>()), feature(feature_) {} + EvaluationContext(float zoom_, GeometryTileFeature const * feature_) : + zoom(zoom_), feature(feature_) + {} + EvaluationContext(optional<float> zoom_, GeometryTileFeature const * feature_, optional<double> heatmapDensity_) : + zoom(std::move(zoom_)), feature(feature_), heatmapDensity(std::move(heatmapDensity_)) + {} + + optional<float> zoom; + GeometryTileFeature const * feature; + optional<double> heatmapDensity; +}; + +template <typename T> +class Result : private variant<EvaluationError, T> { +public: + using variant<EvaluationError, T>::variant; + using Value = T; + + Result() = default; + + explicit operator bool () const { + return this->template is<T>(); + } + + // optional does some type trait magic for this one, so this might + // be problematic as is. + const T* operator->() const { + assert(this->template is<T>()); + return std::addressof(this->template get<T>()); + } + + T* operator->() { + assert(this->template is<T>()); + return std::addressof(this->template get<T>()); + } + + T& operator*() { + assert(this->template is<T>()); + return this->template get<T>(); + } + + const T& operator*() const { + assert(this->template is<T>()); + return this->template get<T>(); + } + + const EvaluationError& error() const { + assert(this->template is<EvaluationError>()); + return this->template get<EvaluationError>(); + } +}; + +class EvaluationResult : public Result<Value> { +public: + using Result::Result; // NOLINT + + EvaluationResult() = default; + + EvaluationResult(const std::array<double, 4>& arr) : + Result(toExpressionValue(arr)) + {} + + // used only for the special (private) "error" expression + EvaluationResult(const type::ErrorType&) { + assert(false); + } +}; + +/* + Expression is an abstract class that serves as an interface and base class + for particular expression implementations. + + CompoundExpression implements the majority of expressions in the spec by + inferring the argument and output from a simple function (const T0& arg0, + const T1& arg1, ...) -> Result<U> where T0, T1, ..., U are member types of + mbgl::style::expression::Value. + + The other Expression subclasses (Let, Curve, Match, etc.) exist in order to + implement expressions that need specialized parsing, type checking, or + evaluation logic that can't be handled by CompoundExpression's inference + mechanism. + + Each Expression subclass also provides a static + ParseResult ExpressionClass::parse(const V&, ParsingContext), + which handles parsing a style-spec JSON representation of the expression. +*/ +class Expression { +public: + Expression(type::Type type_) : type(std::move(type_)) {} + virtual ~Expression() = default; + + virtual EvaluationResult evaluate(const EvaluationContext& params) const = 0; + virtual void eachChild(const std::function<void(const Expression&)>&) const = 0; + virtual bool operator==(const Expression&) const = 0; + bool operator!=(const Expression& rhs) const { + return !operator==(rhs); + } + + type::Type getType() const { return type; }; + + EvaluationResult evaluate(optional<float> zoom, const Feature& feature, optional<double> heatmapDensity) const; + + /** + * Statically analyze the expression, attempting to enumerate possible outputs. Returns + * an array of values plus the sentinel null optional value, used to indicate that the + * complete set of outputs is statically undecidable. + */ + virtual std::vector<optional<Value>> possibleOutputs() const = 0; + +protected: + template <typename T> + static bool childrenEqual(const T& lhs, const T& rhs) { + if (lhs.size() != rhs.size()) return false; + for (auto leftChild = lhs.begin(), rightChild = rhs.begin(); + leftChild != lhs.end(); + leftChild++, rightChild++) + { + if (!Expression::childEqual(*leftChild, *rightChild)) return false; + } + return true; + } + + static bool childEqual(const std::unique_ptr<Expression>& lhs, const std::unique_ptr<Expression>& rhs) { + return *lhs == *rhs; + } + + template <typename T> + static bool childEqual(const std::pair<T, std::unique_ptr<Expression>>& lhs, + const std::pair<T, std::unique_ptr<Expression>>& rhs) { + return lhs.first == rhs.first && *(lhs.second) == *(rhs.second); + } + + template <typename T> + static bool childEqual(const std::pair<T, std::shared_ptr<Expression>>& lhs, + const std::pair<T, std::shared_ptr<Expression>>& rhs) { + return lhs.first == rhs.first && *(lhs.second) == *(rhs.second); + } + + static bool childEqual(const std::pair<std::unique_ptr<Expression>, std::unique_ptr<Expression>>& lhs, + const std::pair<std::unique_ptr<Expression>, std::unique_ptr<Expression>>& rhs) { + return *(lhs.first) == *(rhs.first) && *(lhs.second) == *(rhs.second); + } + +private: + type::Type type; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/find_zoom_curve.hpp b/include/mbgl/style/expression/find_zoom_curve.hpp new file mode 100644 index 0000000000..6301938033 --- /dev/null +++ b/include/mbgl/style/expression/find_zoom_curve.hpp @@ -0,0 +1,20 @@ +#pragma once + +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/expression/interpolate.hpp> +#include <mbgl/style/expression/step.hpp> + +#include <mbgl/util/variant.hpp> +#include <mbgl/util/optional.hpp> + +namespace mbgl { +namespace style { +namespace expression { + +optional<variant<const InterpolateBase*, const Step*, ParsingError>> findZoomCurve(const expression::Expression* e); + +variant<const InterpolateBase*, const Step*> findZoomCurveChecked(const expression::Expression* e); + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/get_covering_stops.hpp b/include/mbgl/style/expression/get_covering_stops.hpp new file mode 100644 index 0000000000..157aefe7bc --- /dev/null +++ b/include/mbgl/style/expression/get_covering_stops.hpp @@ -0,0 +1,18 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/util/range.hpp> +#include <memory> +#include <map> + +namespace mbgl { +namespace style { +namespace expression { + +// Return the smallest range of stops that covers the interval [lower, upper] +Range<float> getCoveringStops(const std::map<double, std::unique_ptr<Expression>>& stops, + const double lower, const double upper); + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/interpolate.hpp b/include/mbgl/style/expression/interpolate.hpp new file mode 100644 index 0000000000..dbed74b4cd --- /dev/null +++ b/include/mbgl/style/expression/interpolate.hpp @@ -0,0 +1,192 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/expression/get_covering_stops.hpp> +#include <mbgl/style/conversion.hpp> + +#include <mbgl/util/interpolate.hpp> +#include <mbgl/util/range.hpp> +#include <mbgl/util/unitbezier.hpp> + +#include <memory> +#include <map> +#include <cmath> + +namespace mbgl { +namespace style { +namespace expression { + +class ExponentialInterpolator { +public: + ExponentialInterpolator(double base_) : base(base_) {} + + double base; + + double interpolationFactor(const Range<double>& inputLevels, const double input) const { + return util::interpolationFactor(base, + Range<float> { + static_cast<float>(inputLevels.min), + static_cast<float>(inputLevels.max) + }, + input); + } + + bool operator==(const ExponentialInterpolator& rhs) const { + return base == rhs.base; + } +}; + +class CubicBezierInterpolator { +public: + CubicBezierInterpolator(double x1_, double y1_, double x2_, double y2_) : ub(x1_, y1_, x2_, y2_) {} + + double interpolationFactor(const Range<double>& inputLevels, const double input) const { + return ub.solve(input / (inputLevels.max - inputLevels.min), 1e-6); + } + + bool operator==(const CubicBezierInterpolator& rhs) const { + return ub == rhs.ub; + } + + util::UnitBezier ub; +}; + + +ParseResult parseInterpolate(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + +class InterpolateBase : public Expression { +public: + using Interpolator = variant<ExponentialInterpolator, CubicBezierInterpolator>; + + InterpolateBase(const type::Type& type_, + Interpolator interpolator_, + std::unique_ptr<Expression> input_, + std::map<double, std::unique_ptr<Expression>> stops_ + ) : Expression(type_), + interpolator(std::move(interpolator_)), + input(std::move(input_)), + stops(std::move(stops_)) + {} + + const std::unique_ptr<Expression>& getInput() const { return input; } + const Interpolator& getInterpolator() const { return interpolator; } + + void eachChild(const std::function<void(const Expression&)>& visit) const override { + visit(*input); + for (const auto& stop : stops) { + visit(*stop.second); + } + } + + void eachStop(const std::function<void(double, const Expression&)>& visit) const { + for (const auto& stop : stops) { + visit(stop.first, *stop.second); + } + } + + // Return the smallest range of stops that covers the interval [lower, upper] + Range<float> getCoveringStops(const double lower, const double upper) const { + return ::mbgl::style::expression::getCoveringStops(stops, lower, upper); + } + + double interpolationFactor(const Range<double>& inputLevels, const double inputValue) const { + return interpolator.match( + [&](const auto& interp) { return interp.interpolationFactor(inputLevels, inputValue); } + ); + } + + std::vector<optional<Value>> possibleOutputs() const override; + +protected: + const Interpolator interpolator; + const std::unique_ptr<Expression> input; + const std::map<double, std::unique_ptr<Expression>> stops; +}; + +template <typename T> +class Interpolate : public InterpolateBase { +public: + Interpolate(type::Type type_, + Interpolator interpolator_, + std::unique_ptr<Expression> input_, + std::map<double, std::unique_ptr<Expression>> stops_ + ) : InterpolateBase(std::move(type_), std::move(interpolator_), std::move(input_), std::move(stops_)) + { + static_assert(util::Interpolatable<T>::value, "Interpolate expression requires an interpolatable value type."); + } + + EvaluationResult evaluate(const EvaluationContext& params) const override { + const EvaluationResult evaluatedInput = input->evaluate(params); + if (!evaluatedInput) { + return evaluatedInput.error(); + } + + float x = *fromExpressionValue<float>(*evaluatedInput); + if (std::isnan(x)) { + return EvaluationError { "Input is not a number." }; + } + + if (stops.empty()) { + return EvaluationError { "No stops in exponential curve." }; + } + + auto it = stops.upper_bound(x); + if (it == stops.end()) { + return stops.rbegin()->second->evaluate(params); + } else if (it == stops.begin()) { + return stops.begin()->second->evaluate(params); + } else { + float t = interpolationFactor({ std::prev(it)->first, it->first }, x); + + if (t == 0.0f) { + return std::prev(it)->second->evaluate(params); + } + if (t == 1.0f) { + return it->second->evaluate(params); + } + + EvaluationResult lower = std::prev(it)->second->evaluate(params); + if (!lower) { + return lower.error(); + } + EvaluationResult upper = it->second->evaluate(params); + if (!upper) { + return upper.error(); + } + + if (!lower->is<T>()) { + return EvaluationError { + "Expected value to be of type " + toString(valueTypeToExpressionType<T>()) + + ", but found " + toString(typeOf(*lower)) + " instead." + }; + } + + if (!upper->is<T>()) { + return EvaluationError { + "Expected value to be of type " + toString(valueTypeToExpressionType<T>()) + + ", but found " + toString(typeOf(*upper)) + " instead." + }; + } + return util::interpolate(lower->get<T>(), upper->get<T>(), t); + } + } + + bool operator==(const Expression& e) const override { + if (auto rhs = dynamic_cast<const Interpolate*>(&e)) { + if (interpolator != rhs->interpolator || + *input != *(rhs->input) || + stops.size() != rhs->stops.size()) + { + return false; + } + + return Expression::childrenEqual(stops, rhs->stops); + } + return false; + } +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/is_constant.hpp b/include/mbgl/style/expression/is_constant.hpp new file mode 100644 index 0000000000..29e03ccbc0 --- /dev/null +++ b/include/mbgl/style/expression/is_constant.hpp @@ -0,0 +1,35 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/compound_expression.hpp> + +namespace mbgl { +namespace style { +namespace expression { + +template <typename T> +bool isGlobalPropertyConstant(const Expression& expression, const T& properties) { + if (auto e = dynamic_cast<const CompoundExpressionBase*>(&expression)) { + for (const std::string& property : properties) { + if (e->getName() == property) { + return false; + } + } + } + + bool isConstant = true; + expression.eachChild([&](const Expression& e) { + if (isConstant && !isGlobalPropertyConstant(e, properties)) { + isConstant = false; + } + }); + return isConstant; +}; + +bool isFeatureConstant(const Expression& expression); +bool isZoomConstant(const Expression& e); + + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/is_expression.hpp b/include/mbgl/style/expression/is_expression.hpp new file mode 100644 index 0000000000..77c489619c --- /dev/null +++ b/include/mbgl/style/expression/is_expression.hpp @@ -0,0 +1,13 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> + +namespace mbgl { +namespace style { +namespace expression { + +bool isExpression(const conversion::Convertible& value); + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/let.hpp b/include/mbgl/style/expression/let.hpp new file mode 100644 index 0000000000..6829ded9b8 --- /dev/null +++ b/include/mbgl/style/expression/let.hpp @@ -0,0 +1,76 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> +#include <map> + +namespace mbgl { +namespace style { +namespace expression { + +class Let : public Expression { +public: + using Bindings = std::map<std::string, std::shared_ptr<Expression>>; + + Let(Bindings bindings_, std::unique_ptr<Expression> result_) : + Expression(result_->getType()), + bindings(std::move(bindings_)), + result(std::move(result_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>&) const override; + + bool operator==(const Expression& e) const override { + if (auto rhs = dynamic_cast<const Let*>(&e)) { + return *result == *(rhs->result); + } + return false; + } + + std::vector<optional<Value>> possibleOutputs() const override; + + Expression* getResult() const { + return result.get(); + } + +private: + Bindings bindings; + std::unique_ptr<Expression> result; +}; + +class Var : public Expression { +public: + Var(std::string name_, std::shared_ptr<Expression> value_) : + Expression(value_->getType()), + name(std::move(name_)), + value(value_) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&); + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>&) const override; + + bool operator==(const Expression& e) const override { + if (auto rhs = dynamic_cast<const Var*>(&e)) { + return *value == *(rhs->value); + } + return false; + } + + std::vector<optional<Value>> possibleOutputs() const override; + +private: + std::string name; + std::shared_ptr<Expression> value; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/literal.hpp b/include/mbgl/style/expression/literal.hpp new file mode 100644 index 0000000000..82983d78af --- /dev/null +++ b/include/mbgl/style/expression/literal.hpp @@ -0,0 +1,42 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { + +class Literal : public Expression { +public: + Literal(Value value_) : Expression(typeOf(value_)), value(value_) {} + Literal(type::Array type_, std::vector<Value> value_) : Expression(type_), value(value_) {} + EvaluationResult evaluate(const EvaluationContext&) const override { + return value; + } + + static ParseResult parse(const mbgl::style::conversion::Convertible&, ParsingContext&); + + void eachChild(const std::function<void(const Expression&)>&) const override {} + + bool operator==(const Expression& e) const override { + if (auto rhs = dynamic_cast<const Literal*>(&e)) { + return value == rhs->value; + } + return false; + } + + std::vector<optional<Value>> possibleOutputs() const override { + return {{ value }}; + } + +private: + Value value; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/match.hpp b/include/mbgl/style/expression/match.hpp new file mode 100644 index 0000000000..682d784b0f --- /dev/null +++ b/include/mbgl/style/expression/match.hpp @@ -0,0 +1,46 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/conversion.hpp> + +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { + +template <typename T> +class Match : public Expression { +public: + using Branches = std::unordered_map<T, std::shared_ptr<Expression>>; + + Match(type::Type type_, + std::unique_ptr<Expression> input_, + Branches branches_, + std::unique_ptr<Expression> otherwise_ + ) : Expression(type_), + input(std::move(input_)), + branches(std::move(branches_)), + otherwise(std::move(otherwise_)) + {} + + EvaluationResult evaluate(const EvaluationContext& params) const override; + + void eachChild(const std::function<void(const Expression&)>& visit) const override; + + bool operator==(const Expression& e) const override; + + std::vector<optional<Value>> possibleOutputs() const override; + +private: + std::unique_ptr<Expression> input; + Branches branches; + std::unique_ptr<Expression> otherwise; +}; + +ParseResult parseMatch(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/parsing_context.hpp b/include/mbgl/style/expression/parsing_context.hpp new file mode 100644 index 0000000000..f92a4c95ea --- /dev/null +++ b/include/mbgl/style/expression/parsing_context.hpp @@ -0,0 +1,156 @@ +#pragma once + +#include <mbgl/util/optional.hpp> +#include <mbgl/util/string.hpp> +#include <mbgl/style/expression/type.hpp> +#include <mbgl/style/conversion.hpp> + +#include <iterator> +#include <map> +#include <string> +#include <vector> +#include <memory> + +namespace mbgl { +namespace style { +namespace expression { + +class Expression; + +struct ParsingError { + std::string message; + std::string key; + bool operator==(const ParsingError& rhs) const { return message == rhs.message && key == rhs.key; } +}; + +using ParseResult = optional<std::unique_ptr<Expression>>; + +namespace detail { + +class Scope { +public: + Scope(const std::map<std::string, std::shared_ptr<Expression>>& bindings_, std::shared_ptr<Scope> parent_ = nullptr) : + bindings(bindings_), + parent(std::move(parent_)) + {} + + const std::map<std::string, std::shared_ptr<Expression>>& bindings; + std::shared_ptr<Scope> parent; + + optional<std::shared_ptr<Expression>> get(const std::string& name) { + auto it = bindings.find(name); + if (it != bindings.end()) { + return {it->second}; + } else if (parent) { + return parent->get(name); + } else { + return optional<std::shared_ptr<Expression>>(); + } + } +}; + +} // namespace detail + +class ParsingContext { +public: + ParsingContext() : errors(std::make_shared<std::vector<ParsingError>>()) {} + ParsingContext(std::string key_) : key(std::move(key_)), errors(std::make_shared<std::vector<ParsingError>>()) {} + explicit ParsingContext(optional<type::Type> expected_) + : expected(std::move(expected_)), + errors(std::make_shared<std::vector<ParsingError>>()) + {} + ParsingContext(ParsingContext&&) = default; + + ParsingContext(const ParsingContext&) = delete; + ParsingContext& operator=(const ParsingContext&) = delete; + + std::string getKey() const { return key; } + optional<type::Type> getExpected() const { return expected; } + const std::vector<ParsingError>& getErrors() const { return *errors; } + + enum TypeAnnotationOption { + includeTypeAnnotations, + omitTypeAnnotations + }; + + /* + Parse the given style-spec JSON value into an Expression object. + Specifically, this function is responsible for determining the expression + type (either Literal, or the one named in value[0]) and dispatching to the + appropriate ParseXxxx::parse(const V&, ParsingContext) method. + */ + ParseResult parse(const mbgl::style::conversion::Convertible& value, + TypeAnnotationOption typeAnnotationOption = includeTypeAnnotations); + + /* + Parse a child expression. + */ + ParseResult parse(const mbgl::style::conversion::Convertible&, + std::size_t, + optional<type::Type> = {}, + TypeAnnotationOption typeAnnotationOption = includeTypeAnnotations); + + /* + Parse a child expression. + */ + ParseResult parse(const mbgl::style::conversion::Convertible&, + std::size_t index, + optional<type::Type>, + const std::map<std::string, std::shared_ptr<Expression>>&); + + /* + Check whether `t` is a subtype of `expected`, collecting an error if not. + */ + optional<std::string> checkType(const type::Type& t); + + optional<std::shared_ptr<Expression>> getBinding(const std::string name) { + if (!scope) return optional<std::shared_ptr<Expression>>(); + return scope->get(name); + } + + void error(std::string message) { + errors->push_back({message, key}); + } + + void error(std::string message, std::size_t child) { + errors->push_back({message, key + "[" + util::toString(child) + "]"}); + } + + void error(std::string message, std::size_t child, std::size_t grandchild) { + errors->push_back({message, key + "[" + util::toString(child) + "][" + util::toString(grandchild) + "]"}); + } + + void appendErrors(ParsingContext&& ctx) { + errors->reserve(errors->size() + ctx.errors->size()); + std::move(ctx.errors->begin(), ctx.errors->end(), std::inserter(*errors, errors->end())); + ctx.errors->clear(); + } + + void clearErrors() { + errors->clear(); + } + +private: + ParsingContext(std::string key_, + std::shared_ptr<std::vector<ParsingError>> errors_, + optional<type::Type> expected_, + std::shared_ptr<detail::Scope> scope_) + : key(std::move(key_)), + expected(std::move(expected_)), + scope(std::move(scope_)), + errors(std::move(errors_)) + {} + + std::string key; + optional<type::Type> expected; + std::shared_ptr<detail::Scope> scope; + std::shared_ptr<std::vector<ParsingError>> errors; +}; + +using ParseFunction = ParseResult (*)(const conversion::Convertible&, ParsingContext&); +using ExpressionRegistry = std::unordered_map<std::string, ParseFunction>; +const ExpressionRegistry& getExpressionRegistry(); + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/step.hpp b/include/mbgl/style/expression/step.hpp new file mode 100644 index 0000000000..6bf42e20f1 --- /dev/null +++ b/include/mbgl/style/expression/step.hpp @@ -0,0 +1,48 @@ + +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/parsing_context.hpp> +#include <mbgl/style/conversion.hpp> + +#include <mbgl/util/range.hpp> + +#include <memory> +#include <map> + + +namespace mbgl { +namespace style { +namespace expression { + +class Step : public Expression { +public: + Step(const type::Type& type_, + std::unique_ptr<Expression> input_, + std::map<double, std::unique_ptr<Expression>> stops_ + ) : Expression(type_), + input(std::move(input_)), + stops(std::move(stops_)) + {} + + EvaluationResult evaluate(const EvaluationContext& params) const override; + void eachChild(const std::function<void(const Expression&)>& visit) const override; + void eachStop(const std::function<void(double, const Expression&)>& visit) const; + + const std::unique_ptr<Expression>& getInput() const { return input; } + Range<float> getCoveringStops(const double lower, const double upper) const; + + bool operator==(const Expression& e) const override; + + std::vector<optional<Value>> possibleOutputs() const override; + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + +private: + const std::unique_ptr<Expression> input; + const std::map<double, std::unique_ptr<Expression>> stops; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/type.hpp b/include/mbgl/style/expression/type.hpp new file mode 100644 index 0000000000..513c4bdc17 --- /dev/null +++ b/include/mbgl/style/expression/type.hpp @@ -0,0 +1,112 @@ +#pragma once + +#include <mbgl/util/optional.hpp> +#include <mbgl/util/string.hpp> +#include <mbgl/util/variant.hpp> +#include <vector> + +namespace mbgl { +namespace style { +namespace expression { +namespace type { + +template <class T> +std::string toString(const T& t); + +struct NullType { + constexpr NullType() {}; + std::string getName() const { return "null"; } + bool operator==(const NullType&) const { return true; } +}; + +struct NumberType { + constexpr NumberType() {}; + std::string getName() const { return "number"; } + bool operator==(const NumberType&) const { return true; } +}; + +struct BooleanType { + constexpr BooleanType() {}; + std::string getName() const { return "boolean"; } + bool operator==(const BooleanType&) const { return true; } +}; + +struct StringType { + constexpr StringType() {}; + std::string getName() const { return "string"; } + bool operator==(const StringType&) const { return true; } +}; + +struct ColorType { + constexpr ColorType() {}; + std::string getName() const { return "color"; } + bool operator==(const ColorType&) const { return true; } +}; + +struct ObjectType { + constexpr ObjectType() {}; + std::string getName() const { return "object"; } + bool operator==(const ObjectType&) const { return true; } +}; + +struct ErrorType { + constexpr ErrorType() {}; + std::string getName() const { return "error"; } + bool operator==(const ErrorType&) const { return true; } +}; + +struct ValueType { + constexpr ValueType() {}; + std::string getName() const { return "value"; } + bool operator==(const ValueType&) const { return true; } +}; + +constexpr NullType Null; +constexpr NumberType Number; +constexpr StringType String; +constexpr BooleanType Boolean; +constexpr ColorType Color; +constexpr ValueType Value; +constexpr ObjectType Object; +constexpr ErrorType Error; + +struct Array; + +using Type = variant< + NullType, + NumberType, + BooleanType, + StringType, + ColorType, + ObjectType, + ValueType, + mapbox::util::recursive_wrapper<Array>, + ErrorType>; + +struct Array { + explicit Array(Type itemType_) : itemType(std::move(itemType_)) {} + Array(Type itemType_, std::size_t N_) : itemType(std::move(itemType_)), N(N_) {} + Array(Type itemType_, optional<std::size_t> N_) : itemType(std::move(itemType_)), N(std::move(N_)) {} + std::string getName() const { + if (N) { + return "array<" + toString(itemType) + ", " + util::toString(*N) + ">"; + } else if (itemType == Value) { + return "array"; + } else { + return "array<" + toString(itemType) + ">"; + } + } + + bool operator==(const Array& rhs) const { return itemType == rhs.itemType && N == rhs.N; } + + Type itemType; + optional<std::size_t> N; +}; + +template <class T> +std::string toString(const T& type) { return type.match([&] (const auto& t) { return t.getName(); }); } + +} // namespace type +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/expression/value.hpp b/include/mbgl/style/expression/value.hpp new file mode 100644 index 0000000000..be5be64752 --- /dev/null +++ b/include/mbgl/style/expression/value.hpp @@ -0,0 +1,162 @@ +#pragma once + +#include <mbgl/style/expression/type.hpp> +#include <mbgl/style/position.hpp> +#include <mbgl/style/types.hpp> +#include <mbgl/util/color.hpp> +#include <mbgl/util/enum.hpp> +#include <mbgl/util/feature.hpp> +#include <mbgl/util/variant.hpp> + +#include <array> +#include <vector> + +namespace mbgl { +namespace style { +namespace expression { + +struct Value; + +using ValueBase = variant< + NullValue, + bool, + double, + std::string, + Color, + mapbox::util::recursive_wrapper<std::vector<Value>>, + mapbox::util::recursive_wrapper<std::unordered_map<std::string, Value>>>; +struct Value : ValueBase { + using ValueBase::ValueBase; + + // Javascript's Number.MAX_SAFE_INTEGER + static uint64_t maxSafeInteger() { return 9007199254740991ULL; } + + static bool isSafeInteger(uint64_t x) { return x <= maxSafeInteger(); }; + static bool isSafeInteger(int64_t x) { + return static_cast<uint64_t>(x > 0 ? x : -x) <= maxSafeInteger(); + } + static bool isSafeInteger(double x) { + return static_cast<uint64_t>(x > 0 ? x : -x) <= maxSafeInteger(); + } + +}; + +constexpr NullValue Null = NullValue(); + +type::Type typeOf(const Value& value); +std::string stringify(const Value& value); + +/* + Returns a Type object representing the expression type that corresponds to + the value type T. (Specialized for primitives and specific array types in + the .cpp.) +*/ +template <typename T> +type::Type valueTypeToExpressionType(); + +/* + Conversions between style value types and expression::Value +*/ + +// no-op overloads +Value toExpressionValue(const Value&); + +// T = Value (just wrap in optional) +template <typename T> +std::enable_if_t<std::is_same<T, Value>::value, +optional<T>> fromExpressionValue(const Value& v) +{ + return optional<T>(v); +} + +// T = member type of Value +template <typename T> +std::enable_if_t< std::is_convertible<T, Value>::value && !std::is_same<T, Value>::value, +optional<T>> fromExpressionValue(const Value& v) +{ + return v.template is<T>() ? v.template get<T>() : optional<T>(); +} + +// real conversions +template <typename T, typename Enable = std::enable_if_t< !std::is_convertible<T, Value>::value >> +Value toExpressionValue(const T& value); + +template <typename T> +std::enable_if_t< !std::is_convertible<T, Value>::value, +optional<T>> fromExpressionValue(const Value& v); + + + +template <class T, class Enable = void> +struct ValueConverter { + using ExpressionType = T; + + static Value toExpressionValue(const T& value) { + return Value(value); + } + static optional<T> fromExpressionValue(const Value& value) { + return value.template is<T>() ? value.template get<T>() : optional<T>(); + } +}; + +template <> +struct ValueConverter<float> { + using ExpressionType = double; + static type::Type expressionType() { return type::Number; } + static Value toExpressionValue(const float value); + static optional<float> fromExpressionValue(const Value& value); +}; + +template<> +struct ValueConverter<mbgl::Value> { + static Value toExpressionValue(const mbgl::Value& value); +}; + +template <typename T, std::size_t N> +struct ValueConverter<std::array<T, N>> { + using ExpressionType = std::vector<Value>; + static type::Type expressionType() { + return type::Array(valueTypeToExpressionType<T>(), N); + } + static Value toExpressionValue(const std::array<T, N>& value); + static optional<std::array<T, N>> fromExpressionValue(const Value& value); +}; + +template <typename T> +struct ValueConverter<std::vector<T>> { + using ExpressionType = std::vector<Value>; + static type::Type expressionType() { + return type::Array(valueTypeToExpressionType<T>()); + } + static Value toExpressionValue(const std::vector<T>& value); + static optional<std::vector<T>> fromExpressionValue(const Value& value); +}; + +template <> +struct ValueConverter<Position> { + using ExpressionType = std::vector<Value>; + static type::Type expressionType() { return type::Array(type::Number, 3); } + static Value toExpressionValue(const mbgl::style::Position& value); + static optional<Position> fromExpressionValue(const Value& v); +}; + +template <typename T> +struct ValueConverter<T, std::enable_if_t< std::is_enum<T>::value >> { + using ExpressionType = std::string; + static type::Type expressionType() { return type::String; } + static Value toExpressionValue(const T& value); + static optional<T> fromExpressionValue(const Value& value); +}; + +template <typename T> +std::vector<optional<T>> fromExpressionValues(const std::vector<optional<Value>>& values) { + std::vector<optional<T>> result; + for (const auto& value : values) { + result.push_back(value ? fromExpressionValue<T>(*value) : nullopt); + } + return result; +} + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/function/camera_function.hpp b/include/mbgl/style/function/camera_function.hpp index 7fde365b3d..1da5d2c601 100644 --- a/include/mbgl/style/function/camera_function.hpp +++ b/include/mbgl/style/function/camera_function.hpp @@ -1,5 +1,12 @@ #pragma once +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/interpolate.hpp> +#include <mbgl/style/expression/step.hpp> +#include <mbgl/style/expression/find_zoom_curve.hpp> +#include <mbgl/style/expression/value.hpp> +#include <mbgl/style/expression/is_constant.hpp> +#include <mbgl/style/function/convert.hpp> #include <mbgl/style/function/exponential_stops.hpp> #include <mbgl/style/function/interval_stops.hpp> #include <mbgl/util/interpolate.hpp> @@ -18,24 +25,66 @@ public: IntervalStops<T>>, variant< IntervalStops<T>>>; + + CameraFunction(std::unique_ptr<expression::Expression> expression_) + : expression(std::move(expression_)), + zoomCurve(expression::findZoomCurveChecked(expression.get())) + { + assert(!expression::isZoomConstant(*expression)); + assert(expression::isFeatureConstant(*expression)); + } CameraFunction(Stops stops_) - : stops(std::move(stops_)) { - } + : stops(std::move(stops_)), + expression(stops.match([&] (const auto& s) { + return expression::Convert::toExpression(s); + })), + zoomCurve(expression::findZoomCurveChecked(expression.get())) + {} T evaluate(float zoom) const { - return stops.match([&] (const auto& s) { - return s.evaluate(zoom).value_or(T()); - }); + const expression::EvaluationResult result = expression->evaluate(expression::EvaluationContext(zoom, nullptr)); + if (result) { + const optional<T> typed = expression::fromExpressionValue<T>(*result); + return typed ? *typed : T(); + } + return T(); } + float interpolationFactor(const Range<float>& inputLevels, const float inputValue) const { + return zoomCurve.match( + [&](const expression::InterpolateBase* z) { + return z->interpolationFactor(Range<double> { inputLevels.min, inputLevels.max }, inputValue); + }, + [&](const expression::Step*) { return 0.0f; } + ); + } + + Range<float> getCoveringStops(const float lower, const float upper) const { + return zoomCurve.match( + [&](auto z) { return z->getCoveringStops(lower, upper); } + ); + } + + std::vector<optional<T>> possibleOutputs() const { + return expression::fromExpressionValues<T>(expression->possibleOutputs()); + } + friend bool operator==(const CameraFunction& lhs, const CameraFunction& rhs) { - return lhs.stops == rhs.stops; + return *lhs.expression == *rhs.expression; } - Stops stops; bool useIntegerZoom = false; + + const expression::Expression& getExpression() const { return *expression; } + + // retained for compatibility with pre-expression function API + Stops stops; + +private: + std::shared_ptr<expression::Expression> expression; + const variant<const expression::InterpolateBase*, const expression::Step*> zoomCurve; }; } // namespace style diff --git a/include/mbgl/style/function/composite_function.hpp b/include/mbgl/style/function/composite_function.hpp index 7b524b6021..f391b101ae 100644 --- a/include/mbgl/style/function/composite_function.hpp +++ b/include/mbgl/style/function/composite_function.hpp @@ -1,5 +1,12 @@ #pragma once +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/interpolate.hpp> +#include <mbgl/style/expression/step.hpp> +#include <mbgl/style/expression/find_zoom_curve.hpp> +#include <mbgl/style/expression/value.hpp> +#include <mbgl/style/expression/is_constant.hpp> +#include <mbgl/style/function/convert.hpp> #include <mbgl/style/function/composite_exponential_stops.hpp> #include <mbgl/style/function/composite_interval_stops.hpp> #include <mbgl/style/function/composite_categorical_stops.hpp> @@ -43,110 +50,77 @@ public: CompositeIntervalStops<T>, CompositeCategoricalStops<T>>>; - CompositeFunction(std::string property_, Stops stops_, optional<T> defaultValue_ = {}) - : property(std::move(property_)), - stops(std::move(stops_)), - defaultValue(std::move(defaultValue_)) { - } - - struct CoveringRanges { - float zoom; - Range<float> coveringZoomRange; - Range<InnerStops> coveringStopsRange; - }; - - // Return the relevant stop zoom values and inner stops that bracket a given zoom level. This - // is the first step toward evaluating the function, and is used for in the course of both partial - // evaluation of data-driven paint properties, and full evaluation of data-driven layout properties. - CoveringRanges coveringRanges(float zoom) const { - return stops.match( - [&] (const auto& s) { - assert(!s.stops.empty()); - auto minIt = s.stops.lower_bound(zoom); - auto maxIt = s.stops.upper_bound(zoom); - - // lower_bound yields first element >= zoom, but we want the *last* - // element <= zoom, so if we found a stop > zoom, back up by one. - if (minIt != s.stops.begin() && minIt != s.stops.end() && minIt->first > zoom) { - minIt--; - } - - return CoveringRanges { - zoom, - Range<float> { - minIt == s.stops.end() ? s.stops.rbegin()->first : minIt->first, - maxIt == s.stops.end() ? s.stops.rbegin()->first : maxIt->first - }, - Range<InnerStops> { - s.innerStops(minIt == s.stops.end() ? s.stops.rbegin()->second : minIt->second), - s.innerStops(maxIt == s.stops.end() ? s.stops.rbegin()->second : maxIt->second) - } - }; - } - ); - } - - // Given a range of zoom values (typically two adjacent integer zoom levels, e.g. 5.0 and 6.0), - // return the covering ranges for both. This is used in the course of partial evaluation for - // data-driven paint properties. - Range<CoveringRanges> rangeOfCoveringRanges(Range<float> zoomRange) { - return Range<CoveringRanges> { - coveringRanges(zoomRange.min), - coveringRanges(zoomRange.max) - }; + CompositeFunction(std::unique_ptr<expression::Expression> expression_) + : expression(std::move(expression_)), + zoomCurve(expression::findZoomCurveChecked(expression.get())) + { + assert(!expression::isZoomConstant(*expression)); + assert(!expression::isFeatureConstant(*expression)); } - // Given the covering ranges for range of zoom values (typically two adjacent integer zoom levels, - // e.g. 5.0 and 6.0), and a feature, return the results of fully evaluating the function for that - // feature at each of the two zoom levels. These two results are what go into the paint vertex buffers - // for vertices associated with this feature. The shader will interpolate between them at render time. + CompositeFunction(std::string property_, Stops stops_, optional<T> defaultValue_ = {}) + : property(std::move(property_)), + stops(std::move(stops_)), + defaultValue(std::move(defaultValue_)), + expression(stops.match([&] (const auto& s) { + return expression::Convert::toExpression(property, s); + })), + zoomCurve(expression::findZoomCurveChecked(expression.get())) + {} + + // Return the range obtained by evaluating the function at each of the zoom levels in zoomRange template <class Feature> - Range<T> evaluate(const Range<CoveringRanges>& ranges, const Feature& feature, T finalDefaultValue) { - optional<Value> value = feature.getValue(property); - if (!value) { - return Range<T> { - defaultValue.value_or(finalDefaultValue), - defaultValue.value_or(finalDefaultValue) - }; - } + Range<T> evaluate(const Range<float>& zoomRange, const Feature& feature, T finalDefaultValue) { return Range<T> { - evaluateFinal(ranges.min, *value, finalDefaultValue), - evaluateFinal(ranges.max, *value, finalDefaultValue) + evaluate(zoomRange.min, feature, finalDefaultValue), + evaluate(zoomRange.max, feature, finalDefaultValue) }; } - // Fully evaluate the function for a zoom value and feature. This is used when evaluating data-driven - // layout properties. template <class Feature> T evaluate(float zoom, const Feature& feature, T finalDefaultValue) const { - optional<Value> value = feature.getValue(property); - if (!value) { - return defaultValue.value_or(finalDefaultValue); + const expression::EvaluationResult result = expression->evaluate(expression::EvaluationContext({zoom}, &feature)); + if (result) { + const optional<T> typed = expression::fromExpressionValue<T>(*result); + return typed ? *typed : defaultValue ? *defaultValue : finalDefaultValue; } - return evaluateFinal(coveringRanges(zoom), *value, finalDefaultValue); + return defaultValue ? *defaultValue : finalDefaultValue; + } + + float interpolationFactor(const Range<float>& inputLevels, const float inputValue) const { + return zoomCurve.match( + [&](const expression::InterpolateBase* z) { + return z->interpolationFactor(Range<double> { inputLevels.min, inputLevels.max }, inputValue); + }, + [&](const expression::Step*) { return 0.0f; } + ); + } + + Range<float> getCoveringStops(const float lower, const float upper) const { + return zoomCurve.match( + [&](auto z) { return z->getCoveringStops(lower, upper); } + ); + } + + std::vector<optional<T>> possibleOutputs() const { + return expression::fromExpressionValues<T>(expression->possibleOutputs()); } friend bool operator==(const CompositeFunction& lhs, const CompositeFunction& rhs) { - return std::tie(lhs.property, lhs.stops, lhs.defaultValue) - == std::tie(rhs.property, rhs.stops, rhs.defaultValue); + return *lhs.expression == *rhs.expression; } + const expression::Expression& getExpression() const { return *expression; } + std::string property; Stops stops; optional<T> defaultValue; bool useIntegerZoom = false; - + private: - T evaluateFinal(const CoveringRanges& ranges, const Value& value, T finalDefaultValue) const { - auto eval = [&] (const auto& s) { - return s.evaluate(value).value_or(defaultValue.value_or(finalDefaultValue)); - }; - return util::interpolate( - ranges.coveringStopsRange.min.match(eval), - ranges.coveringStopsRange.max.match(eval), - util::interpolationFactor(1.0f, ranges.coveringZoomRange, ranges.zoom)); - } + std::shared_ptr<expression::Expression> expression; + const variant<const expression::InterpolateBase*, const expression::Step*> zoomCurve; }; } // namespace style diff --git a/include/mbgl/style/function/convert.hpp b/include/mbgl/style/function/convert.hpp new file mode 100644 index 0000000000..8e544d3ad5 --- /dev/null +++ b/include/mbgl/style/function/convert.hpp @@ -0,0 +1,355 @@ +#pragma once + +#include <mbgl/style/expression/array_assertion.hpp> +#include <mbgl/style/expression/assertion.hpp> +#include <mbgl/style/expression/case.hpp> +#include <mbgl/style/expression/coalesce.hpp> +#include <mbgl/style/expression/compound_expression.hpp> +#include <mbgl/style/expression/coercion.hpp> +#include <mbgl/style/expression/interpolate.hpp> +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/expression/literal.hpp> +#include <mbgl/style/expression/match.hpp> +#include <mbgl/style/expression/step.hpp> + +#include <mbgl/style/function/exponential_stops.hpp> +#include <mbgl/style/function/interval_stops.hpp> +#include <mbgl/style/function/categorical_stops.hpp> +#include <mbgl/style/function/composite_exponential_stops.hpp> +#include <mbgl/style/function/composite_interval_stops.hpp> +#include <mbgl/style/function/composite_categorical_stops.hpp> +#include <mbgl/style/function/identity_stops.hpp> + +#include <mbgl/util/enum.hpp> +#include <mbgl/style/types.hpp> + +#include <string> + + +namespace mbgl { +namespace style { +namespace expression { + +namespace detail { + +class ErrorExpression : public Expression { +public: + ErrorExpression(std::string message_) : Expression(type::Error), message(std::move(message_)) {} + void eachChild(const std::function<void(const Expression&)>&) const override {} + + bool operator==(const Expression& e) const override { + return dynamic_cast<const ErrorExpression*>(&e); + } + + EvaluationResult evaluate(const EvaluationContext&) const override { + return EvaluationError{message}; + } + + std::vector<optional<Value>> possibleOutputs() const override { + return {}; + } + +private: + std::string message; +}; + +} // namespace detail + + +// Create expressions representing 'classic' (i.e. stop-based) style functions + +struct Convert { + template <typename T> + static std::unique_ptr<Literal> makeLiteral(const T& value) { + return std::make_unique<Literal>(Value(toExpressionValue(value))); + } + + static std::unique_ptr<Expression> makeGet(type::Type type, const std::string& property) { + ParsingContext ctx; + std::vector<std::unique_ptr<Expression>> getArgs; + getArgs.push_back(makeLiteral(property)); + ParseResult get = createCompoundExpression("get", std::move(getArgs), ctx); + assert(get); + assert(ctx.getErrors().size() == 0); + + std::vector<std::unique_ptr<Expression>> assertionArgs; + assertionArgs.push_back(std::move(*get)); + + return std::make_unique<Assertion>(type, std::move(assertionArgs)); + } + + static std::unique_ptr<Expression> makeZoom() { + ParsingContext ctx; + ParseResult zoom = createCompoundExpression("zoom", std::vector<std::unique_ptr<Expression>>(), ctx); + assert(zoom); + assert(ctx.getErrors().size() == 0); + return std::move(*zoom); + } + + static std::unique_ptr<Expression> makeError(std::string message) { + return std::make_unique<detail::ErrorExpression>(message); + } + + template <typename OutputType> + static ParseResult makeInterpolate(type::Type type, + std::unique_ptr<Expression> input, + std::map<double, std::unique_ptr<Expression>> convertedStops, + typename Interpolate<OutputType>::Interpolator interpolator) + { + ParseResult curve = ParseResult(std::make_unique<Interpolate<OutputType>>( + std::move(type), + std::move(interpolator), + std::move(input), + std::move(convertedStops) + )); + assert(curve); + return std::move(*curve); + } + + template <typename Key> + static ParseResult makeMatch(type::Type type, + std::unique_ptr<Expression> input, + std::map<CategoricalValue, std::unique_ptr<Expression>> stops) { + // match expression + typename Match<Key>::Branches branches; + for(auto it = stops.begin(); it != stops.end(); it++) { + assert(it->first.template is<Key>()); + Key key = it->first.template get<Key>(); + branches.emplace( + std::move(key), + std::move(it->second) + ); + } + + return ParseResult(std::make_unique<Match<Key>>(std::move(type), + std::move(input), + std::move(branches), + makeError("No matching label"))); + } + + static ParseResult makeCase(type::Type type, + std::unique_ptr<Expression> input, + std::map<CategoricalValue, std::unique_ptr<Expression>> stops) { + // case expression + std::vector<typename Case::Branch> branches; + + auto it = stops.find(true); + std::unique_ptr<Expression> true_case = it == stops.end() ? + makeError("No matching label") : + std::move(it->second); + + it = stops.find(false); + std::unique_ptr<Expression> false_case = it == stops.end() ? + makeError("No matching label") : + std::move(it->second); + + branches.push_back(std::make_pair(std::move(input), std::move(true_case))); + return ParseResult(std::make_unique<Case>(std::move(type), std::move(branches), std::move(false_case))); + } + + template <typename T> + static ParseResult fromCategoricalStops(std::map<CategoricalValue, T> stops, const std::string& property) { + assert(stops.size() > 0); + + std::map<CategoricalValue, std::unique_ptr<Expression>> convertedStops; + for(const std::pair<CategoricalValue, T>& stop : stops) { + convertedStops.emplace( + stop.first, + makeLiteral(stop.second) + ); + } + + type::Type type = valueTypeToExpressionType<T>(); + + const CategoricalValue& firstKey = stops.begin()->first; + return firstKey.match( + [&](bool) { + return makeCase(type, makeGet(type::Boolean, property), std::move(convertedStops)); + }, + [&](const std::string&) { + return makeMatch<std::string>(type, makeGet(type::String, property), std::move(convertedStops)); + }, + [&](int64_t) { + return makeMatch<int64_t>(type, makeGet(type::Number, property), std::move(convertedStops)); + } + ); + } + + template <typename T> + static std::map<double, std::unique_ptr<Expression>> convertStops(const std::map<float, T>& stops) { + std::map<double, std::unique_ptr<Expression>> convertedStops; + for(const auto& stop : stops) { + convertedStops.emplace( + stop.first, + makeLiteral(stop.second) + ); + } + return convertedStops; + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const ExponentialStops<T>& stops) + { + ParseResult e = makeInterpolate<typename ValueConverter<T>::ExpressionType>( + valueTypeToExpressionType<T>(), + makeZoom(), + convertStops(stops.stops), + ExponentialInterpolator(stops.base)); + assert(e); + return std::move(*e); + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const IntervalStops<T>& stops) + { + ParseResult e(std::make_unique<Step>(valueTypeToExpressionType<T>(), + makeZoom(), + convertStops(stops.stops))); + assert(e); + return std::move(*e); + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const std::string& property, + const ExponentialStops<T>& stops) + { + ParseResult e = makeInterpolate<typename ValueConverter<T>::ExpressionType>(valueTypeToExpressionType<T>(), + makeGet(type::Number, property), + convertStops(stops.stops), + ExponentialInterpolator(stops.base)); + assert(e); + return std::move(*e); + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const std::string& property, + const IntervalStops<T>& stops) + { + std::unique_ptr<Expression> get = makeGet(type::Number, property); + ParseResult e(std::make_unique<Step>(valueTypeToExpressionType<T>(), + std::move(get), + convertStops(stops.stops))); + assert(e); + return std::move(*e); + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const std::string& property, + const CategoricalStops<T>& stops) + { + ParseResult expr = fromCategoricalStops(stops.stops, property); + assert(expr); + return std::move(*expr); + } + + // interpolatable zoom curve + template <typename T> + static typename std::enable_if_t<util::Interpolatable<T>::value, + ParseResult> makeZoomCurve(std::map<double, std::unique_ptr<Expression>> stops) { + return makeInterpolate<typename ValueConverter<T>::ExpressionType>(valueTypeToExpressionType<T>(), + makeZoom(), + std::move(stops), + ExponentialInterpolator(1.0)); + } + + // non-interpolatable zoom curve + template <typename T> + static typename std::enable_if_t<!util::Interpolatable<T>::value, + ParseResult> makeZoomCurve(std::map<double, std::unique_ptr<Expression>> stops) { + return ParseResult(std::make_unique<Step>(valueTypeToExpressionType<T>(), makeZoom(), std::move(stops))); + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const std::string& property, + const CompositeExponentialStops<T>& stops) + { + std::map<double, std::unique_ptr<Expression>> outerStops; + for (const std::pair<float, std::map<float, T>>& stop : stops.stops) { + std::unique_ptr<Expression> get = makeGet(type::Number, property); + ParseResult innerInterpolate = makeInterpolate<typename ValueConverter<T>::ExpressionType>(valueTypeToExpressionType<T>(), + std::move(get), + convertStops(stop.second), + ExponentialInterpolator(stops.base)); + assert(innerInterpolate); + outerStops.emplace(stop.first, std::move(*innerInterpolate)); + } + + ParseResult zoomCurve = makeZoomCurve<T>(std::move(outerStops)); + assert(zoomCurve); + return std::move(*zoomCurve); + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const std::string& property, + const CompositeIntervalStops<T>& stops) + { + std::map<double, std::unique_ptr<Expression>> outerStops; + for (const std::pair<float, std::map<float, T>>& stop : stops.stops) { + std::unique_ptr<Expression> get = makeGet(type::Number, property); + ParseResult innerInterpolate(std::make_unique<Step>(valueTypeToExpressionType<T>(), + std::move(get), + convertStops(stop.second))); + assert(innerInterpolate); + outerStops.emplace(stop.first, std::move(*innerInterpolate)); + } + + ParseResult zoomCurve = makeZoomCurve<T>(std::move(outerStops)); + assert(zoomCurve); + return std::move(*zoomCurve); + } + + template <typename T> + static std::unique_ptr<Expression> toExpression(const std::string& property, + const CompositeCategoricalStops<T>& stops) + { + std::map<double, std::unique_ptr<Expression>> outerStops; + for (const std::pair<float, std::map<CategoricalValue, T>>& stop : stops.stops) { + ParseResult innerInterpolate = fromCategoricalStops(stop.second, property); + assert(innerInterpolate); + outerStops.emplace(stop.first, std::move(*innerInterpolate)); + } + + ParseResult zoomCurve = makeZoomCurve<T>(std::move(outerStops)); + assert(zoomCurve); + return std::move(*zoomCurve); + } + + + static std::unique_ptr<Expression> fromIdentityFunction(type::Type type, const std::string& property) + { + std::unique_ptr<Expression> input = type.match( + [&] (const type::StringType&) { + return makeGet(type::String, property); + }, + [&] (const type::NumberType&) { + return makeGet(type::Number, property); + }, + [&] (const type::BooleanType&) { + return makeGet(type::Boolean, property); + }, + [&] (const type::ColorType&) { + std::vector<std::unique_ptr<Expression>> args; + args.push_back(makeGet(type::String, property)); + return std::make_unique<Coercion>(type::Color, std::move(args)); + }, + [&] (const type::Array& arr) { + std::vector<std::unique_ptr<Expression>> getArgs; + getArgs.push_back(makeLiteral(property)); + ParsingContext ctx; + ParseResult get = createCompoundExpression("get", std::move(getArgs), ctx); + assert(get); + assert(ctx.getErrors().size() == 0); + return std::make_unique<ArrayAssertion>(arr, std::move(*get)); + }, + [&] (const auto&) -> std::unique_ptr<Expression> { + return makeLiteral(Null); + } + ); + + return input; + } +}; + +} // namespace expression +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/function/source_function.hpp b/include/mbgl/style/function/source_function.hpp index 9c2ad101ec..d3caa90ee5 100644 --- a/include/mbgl/style/function/source_function.hpp +++ b/include/mbgl/style/function/source_function.hpp @@ -1,5 +1,7 @@ #pragma once +#include <mbgl/style/expression/is_constant.hpp> +#include <mbgl/style/function/convert.hpp> #include <mbgl/style/function/exponential_stops.hpp> #include <mbgl/style/function/interval_stops.hpp> #include <mbgl/style/function/categorical_stops.hpp> @@ -27,33 +29,54 @@ public: CategoricalStops<T>, IdentityStops<T>>>; + SourceFunction(std::unique_ptr<expression::Expression> expression_) + : expression(std::move(expression_)) + { + assert(expression::isZoomConstant(*expression)); + assert(!expression::isFeatureConstant(*expression)); + } + SourceFunction(std::string property_, Stops stops_, optional<T> defaultValue_ = {}) : property(std::move(property_)), stops(std::move(stops_)), - defaultValue(std::move(defaultValue_)) { - } + defaultValue(std::move(defaultValue_)), + expression(stops.match([&] (const IdentityStops<T>&) { + return expression::Convert::fromIdentityFunction(expression::valueTypeToExpressionType<T>(), property); + }, [&] (const auto& s) { + return expression::Convert::toExpression(property, s); + })) + {} template <class Feature> T evaluate(const Feature& feature, T finalDefaultValue) const { - optional<Value> v = feature.getValue(property); - if (!v) { - return defaultValue.value_or(finalDefaultValue); + const expression::EvaluationResult result = expression->evaluate(expression::EvaluationContext(&feature)); + if (result) { + const optional<T> typed = expression::fromExpressionValue<T>(*result); + return typed ? *typed : defaultValue ? *defaultValue : finalDefaultValue; } - return stops.match([&] (const auto& s) -> T { - return s.evaluate(*v).value_or(defaultValue.value_or(finalDefaultValue)); - }); + return defaultValue ? *defaultValue : finalDefaultValue; + } + + std::vector<optional<T>> possibleOutputs() const { + return expression::fromExpressionValues<T>(expression->possibleOutputs()); } friend bool operator==(const SourceFunction& lhs, const SourceFunction& rhs) { - return std::tie(lhs.property, lhs.stops, lhs.defaultValue) - == std::tie(rhs.property, rhs.stops, rhs.defaultValue); + return *lhs.expression == *rhs.expression; } + bool useIntegerZoom = false; + + const expression::Expression& getExpression() const { return *expression; } + + // retained for compatibility with pre-expression function API std::string property; Stops stops; optional<T> defaultValue; - bool useIntegerZoom = false; + +private: + std::shared_ptr<expression::Expression> expression; }; } // namespace style diff --git a/include/mbgl/style/layer.hpp b/include/mbgl/style/layer.hpp index c6a3c0e735..8a5a4236b3 100644 --- a/include/mbgl/style/layer.hpp +++ b/include/mbgl/style/layer.hpp @@ -1,7 +1,7 @@ #pragma once #include <mbgl/util/noncopyable.hpp> -#include <mbgl/util/any.hpp> +#include <mbgl/util/unique_any.hpp> #include <mbgl/util/immutable.hpp> #include <mbgl/style/layer_type.hpp> #include <mbgl/style/types.hpp> @@ -19,6 +19,7 @@ class LineLayer; class CircleLayer; class SymbolLayer; class RasterLayer; +class HillshadeLayer; class BackgroundLayer; class CustomLayer; class FillExtrusionLayer; @@ -86,6 +87,8 @@ public: return std::forward<V>(visitor)(*as<RasterLayer>()); case LayerType::Background: return std::forward<V>(visitor)(*as<BackgroundLayer>()); + case LayerType::Hillshade: + return std::forward<V>(visitor)(*as<HillshadeLayer>()); case LayerType::Custom: return std::forward<V>(visitor)(*as<CustomLayer>()); case LayerType::FillExtrusion: @@ -126,7 +129,7 @@ public: // For use in SDK bindings, which store a reference to a platform-native peer // object here, so that separately-obtained references to this object share // identical platform-native peers. - any peer; + util::unique_any peer; }; } // namespace style diff --git a/include/mbgl/style/layer_type.hpp b/include/mbgl/style/layer_type.hpp index 66ff834eee..951757134b 100644 --- a/include/mbgl/style/layer_type.hpp +++ b/include/mbgl/style/layer_type.hpp @@ -9,10 +9,11 @@ enum class LayerType { Circle, Symbol, Raster, + Hillshade, Background, Custom, FillExtrusion, }; } // namespace style -} // namespace mbgl
\ No newline at end of file +} // namespace mbgl diff --git a/include/mbgl/style/layers/hillshade_layer.hpp b/include/mbgl/style/layers/hillshade_layer.hpp new file mode 100644 index 0000000000..35664da46c --- /dev/null +++ b/include/mbgl/style/layers/hillshade_layer.hpp @@ -0,0 +1,86 @@ +// This file is generated. Do not edit. + +#pragma once + +#include <mbgl/style/layer.hpp> +#include <mbgl/style/filter.hpp> +#include <mbgl/style/property_value.hpp> +#include <mbgl/style/data_driven_property_value.hpp> + +#include <mbgl/util/color.hpp> + +namespace mbgl { +namespace style { + +class TransitionOptions; + +class HillshadeLayer : public Layer { +public: + HillshadeLayer(const std::string& layerID, const std::string& sourceID); + ~HillshadeLayer() final; + + // Source + const std::string& getSourceID() const; + + // Visibility + void setVisibility(VisibilityType) final; + + // Zoom range + void setMinZoom(float) final; + void setMaxZoom(float) final; + + // Paint properties + + static PropertyValue<float> getDefaultHillshadeIlluminationDirection(); + PropertyValue<float> getHillshadeIlluminationDirection() const; + void setHillshadeIlluminationDirection(PropertyValue<float>); + void setHillshadeIlluminationDirectionTransition(const TransitionOptions&); + TransitionOptions getHillshadeIlluminationDirectionTransition() const; + + static PropertyValue<HillshadeIlluminationAnchorType> getDefaultHillshadeIlluminationAnchor(); + PropertyValue<HillshadeIlluminationAnchorType> getHillshadeIlluminationAnchor() const; + void setHillshadeIlluminationAnchor(PropertyValue<HillshadeIlluminationAnchorType>); + void setHillshadeIlluminationAnchorTransition(const TransitionOptions&); + TransitionOptions getHillshadeIlluminationAnchorTransition() const; + + static PropertyValue<float> getDefaultHillshadeExaggeration(); + PropertyValue<float> getHillshadeExaggeration() const; + void setHillshadeExaggeration(PropertyValue<float>); + void setHillshadeExaggerationTransition(const TransitionOptions&); + TransitionOptions getHillshadeExaggerationTransition() const; + + static PropertyValue<Color> getDefaultHillshadeShadowColor(); + PropertyValue<Color> getHillshadeShadowColor() const; + void setHillshadeShadowColor(PropertyValue<Color>); + void setHillshadeShadowColorTransition(const TransitionOptions&); + TransitionOptions getHillshadeShadowColorTransition() const; + + static PropertyValue<Color> getDefaultHillshadeHighlightColor(); + PropertyValue<Color> getHillshadeHighlightColor() const; + void setHillshadeHighlightColor(PropertyValue<Color>); + void setHillshadeHighlightColorTransition(const TransitionOptions&); + TransitionOptions getHillshadeHighlightColorTransition() const; + + static PropertyValue<Color> getDefaultHillshadeAccentColor(); + PropertyValue<Color> getHillshadeAccentColor() const; + void setHillshadeAccentColor(PropertyValue<Color>); + void setHillshadeAccentColorTransition(const TransitionOptions&); + TransitionOptions getHillshadeAccentColorTransition() const; + + // Private implementation + + class Impl; + const Impl& impl() const; + + Mutable<Impl> mutableImpl() const; + HillshadeLayer(Immutable<Impl>); + std::unique_ptr<Layer> cloneRef(const std::string& id) const final; +}; + +template <> +inline bool Layer::is<HillshadeLayer>() const { + return getType() == LayerType::Hillshade; +} + +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/layers/layer.hpp.ejs b/include/mbgl/style/layers/layer.hpp.ejs index 4ee5545247..265dd57e1f 100644 --- a/include/mbgl/style/layers/layer.hpp.ejs +++ b/include/mbgl/style/layers/layer.hpp.ejs @@ -35,7 +35,7 @@ public: <% if (type !== 'background') { -%> // Source const std::string& getSourceID() const; -<% if (type !== 'raster') { -%> +<% if (type !== 'raster' && type !== 'hillshade') { -%> const std::string& getSourceLayer() const; void setSourceLayer(const std::string& sourceLayer); diff --git a/include/mbgl/style/layers/symbol_layer.hpp b/include/mbgl/style/layers/symbol_layer.hpp index a72baa0b4e..f068e2d060 100644 --- a/include/mbgl/style/layers/symbol_layer.hpp +++ b/include/mbgl/style/layers/symbol_layer.hpp @@ -118,9 +118,9 @@ public: DataDrivenPropertyValue<std::string> getTextField() const; void setTextField(DataDrivenPropertyValue<std::string>); - static PropertyValue<std::vector<std::string>> getDefaultTextFont(); - PropertyValue<std::vector<std::string>> getTextFont() const; - void setTextFont(PropertyValue<std::vector<std::string>>); + static DataDrivenPropertyValue<std::vector<std::string>> getDefaultTextFont(); + DataDrivenPropertyValue<std::vector<std::string>> getTextFont() const; + void setTextFont(DataDrivenPropertyValue<std::vector<std::string>>); static DataDrivenPropertyValue<float> getDefaultTextSize(); DataDrivenPropertyValue<float> getTextSize() const; diff --git a/include/mbgl/style/source.hpp b/include/mbgl/style/source.hpp index cec9619451..2f2838ade8 100644 --- a/include/mbgl/style/source.hpp +++ b/include/mbgl/style/source.hpp @@ -2,7 +2,7 @@ #include <mbgl/util/noncopyable.hpp> #include <mbgl/util/optional.hpp> -#include <mbgl/util/any.hpp> +#include <mbgl/util/unique_any.hpp> #include <mbgl/util/immutable.hpp> #include <mbgl/style/types.hpp> @@ -17,6 +17,7 @@ namespace style { class VectorSource; class RasterSource; +class RasterDEMSource; class GeoJSONSource; class SourceObserver; @@ -76,7 +77,7 @@ public: // For use in SDK bindings, which store a reference to a platform-native peer // object here, so that separately-obtained references to this object share // identical platform-native peers. - any peer; + util::unique_any peer; }; } // namespace style diff --git a/include/mbgl/style/sources/custom_geometry_source.hpp b/include/mbgl/style/sources/custom_geometry_source.hpp new file mode 100644 index 0000000000..9daeeb3819 --- /dev/null +++ b/include/mbgl/style/sources/custom_geometry_source.hpp @@ -0,0 +1,58 @@ +#pragma once + +#include <mbgl/style/source.hpp> +#include <mbgl/util/geo.hpp> +#include <mbgl/util/geojson.hpp> +#include <mbgl/util/range.hpp> +#include <mbgl/util/constants.hpp> + +namespace mbgl { + +class OverscaledTileID; +class CanonicalTileID; +template <class T> +class Actor; + +namespace style { + +using TileFunction = std::function<void(const CanonicalTileID&)>; + +class CustomTileLoader; + +class CustomGeometrySource : public Source { +public: + struct TileOptions { + double tolerance = 0.375; + uint16_t tileSize = util::tileSize; + uint16_t buffer = 128; + bool clip = false; + bool wrap = false; + }; + + struct Options { + TileFunction fetchTileFunction; + TileFunction cancelTileFunction; + Range<uint8_t> zoomRange = { 0, 18}; + TileOptions tileOptions; + }; +public: + CustomGeometrySource(std::string id, CustomGeometrySource::Options options); + ~CustomGeometrySource() final; + void loadDescription(FileSource&) final; + void setTileData(const CanonicalTileID&, const GeoJSON&); + void invalidateTile(const CanonicalTileID&); + void invalidateRegion(const LatLngBounds&); + // Private implementation + class Impl; + const Impl& impl() const; +private: + std::unique_ptr<Actor<CustomTileLoader>> loader; +}; + +template <> +inline bool Source::is<CustomGeometrySource>() const { + return getType() == SourceType::CustomVector; +} + +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/sources/geojson_source.hpp b/include/mbgl/style/sources/geojson_source.hpp index 5bdf1ef957..372e7c7a78 100644 --- a/include/mbgl/style/sources/geojson_source.hpp +++ b/include/mbgl/style/sources/geojson_source.hpp @@ -3,6 +3,7 @@ #include <mbgl/style/source.hpp> #include <mbgl/util/geojson.hpp> #include <mbgl/util/optional.hpp> +#include <mbgl/util/constants.hpp> namespace mbgl { @@ -14,6 +15,7 @@ struct GeoJSONOptions { // GeoJSON-VT options uint8_t minzoom = 0; uint8_t maxzoom = 18; + uint16_t tileSize = util::tileSize; uint16_t buffer = 128; double tolerance = 0.375; diff --git a/include/mbgl/style/sources/raster_dem_source.hpp b/include/mbgl/style/sources/raster_dem_source.hpp new file mode 100644 index 0000000000..82588613bc --- /dev/null +++ b/include/mbgl/style/sources/raster_dem_source.hpp @@ -0,0 +1,25 @@ +#pragma once + +#include <mbgl/style/sources/raster_source.hpp> +#include <mbgl/util/tileset.hpp> +#include <mbgl/util/variant.hpp> + +namespace mbgl { + +class AsyncRequest; + +namespace style { + +class RasterDEMSource : public RasterSource { +public: + RasterDEMSource(std::string id, variant<std::string, Tileset> urlOrTileset, uint16_t tileSize); + +}; + +template <> +inline bool Source::is<RasterDEMSource>() const { + return getType() == SourceType::RasterDEM; +} + +} // namespace style +} // namespace mbgl diff --git a/include/mbgl/style/sources/raster_source.hpp b/include/mbgl/style/sources/raster_source.hpp index 7f23a7ca4b..5aa81aa979 100644 --- a/include/mbgl/style/sources/raster_source.hpp +++ b/include/mbgl/style/sources/raster_source.hpp @@ -12,8 +12,8 @@ namespace style { class RasterSource : public Source { public: - RasterSource(std::string id, variant<std::string, Tileset> urlOrTileset, uint16_t tileSize); - ~RasterSource() final; + RasterSource(std::string id, variant<std::string, Tileset> urlOrTileset, uint16_t tileSize, SourceType sourceType = SourceType::Raster); + ~RasterSource() override; const variant<std::string, Tileset>& getURLOrTileset() const; optional<std::string> getURL() const; diff --git a/include/mbgl/style/types.hpp b/include/mbgl/style/types.hpp index ec7358de8c..693972a72f 100644 --- a/include/mbgl/style/types.hpp +++ b/include/mbgl/style/types.hpp @@ -4,18 +4,20 @@ namespace mbgl { -// TODO: should be in public source.hpp header and style namespace +namespace style { + +// TODO: should be in public source.hpp header enum class SourceType : uint8_t { Vector, Raster, + RasterDEM, GeoJSON, Video, Annotations, - Image + Image, + CustomVector }; -namespace style { - enum class VisibilityType : bool { Visible, None, @@ -36,6 +38,11 @@ enum class LineJoinType : uint8_t { FlipBevel }; +enum class HillshadeIlluminationAnchorType : bool { + Map, + Viewport +}; + enum class TranslateAnchorType : bool { Map, Viewport diff --git a/include/mbgl/tile/tile_id.hpp b/include/mbgl/tile/tile_id.hpp index 0457dd3a07..11fb5ce537 100644 --- a/include/mbgl/tile/tile_id.hpp +++ b/include/mbgl/tile/tile_id.hpp @@ -30,9 +30,9 @@ public: CanonicalTileID scaledTo(uint8_t z) const; std::array<CanonicalTileID, 4> children() const; - const uint8_t z; - const uint32_t x; - const uint32_t y; + uint8_t z; + uint32_t x; + uint32_t y; }; ::std::ostream& operator<<(::std::ostream& os, const CanonicalTileID& rhs); diff --git a/include/mbgl/util/any.hpp b/include/mbgl/util/any.hpp deleted file mode 100644 index eea64b188a..0000000000 --- a/include/mbgl/util/any.hpp +++ /dev/null @@ -1,10 +0,0 @@ -#pragma once - -#include <linb/any.hpp> - -namespace mbgl { - -using linb::any; -using linb::any_cast; - -} // namespace mbgl diff --git a/include/mbgl/util/enum.hpp b/include/mbgl/util/enum.hpp index 369ca86bfd..608befd3c4 100644 --- a/include/mbgl/util/enum.hpp +++ b/include/mbgl/util/enum.hpp @@ -11,6 +11,7 @@ namespace mbgl { template <typename T> class Enum { public: + using Type = T; static const char * toString(T); static optional<T> toEnum(const std::string&); }; diff --git a/include/mbgl/util/indexed_tuple.hpp b/include/mbgl/util/indexed_tuple.hpp index fd0b931d36..ea4fe74624 100644 --- a/include/mbgl/util/indexed_tuple.hpp +++ b/include/mbgl/util/indexed_tuple.hpp @@ -1,9 +1,9 @@ #pragma once #include <mbgl/util/type_list.hpp> +#include <mbgl/util/tuple.hpp> #include <type_traits> -#include <tuple> namespace mbgl { @@ -24,20 +24,20 @@ template <class...> class IndexedTuple; // for motivation. // template <class... Is, class... Ts> -class IndexedTuple<TypeList<Is...>, TypeList<Ts...>> : public std::tuple<Ts...> { +class IndexedTuple<TypeList<Is...>, TypeList<Ts...>> : public tuple_polyfill<Ts...> { public: static_assert(sizeof...(Is) == sizeof...(Ts), "IndexedTuple size mismatch"); - using std::tuple<Ts...>::tuple; + using tuple_polyfill<Ts...>::tuple; template <class I> auto& get() { - return std::get<TypeIndex<I, Is...>::value>(*this); + return get_polyfill<TypeIndex<I, Is...>::value>(*this); } template <class I> const auto& get() const { - return std::get<TypeIndex<I, Is...>::value>(*this); + return get_polyfill<TypeIndex<I, Is...>::value>(*this); } template <class... Js, class... Us> diff --git a/include/mbgl/util/interpolate.hpp b/include/mbgl/util/interpolate.hpp index 6738987598..aff730a0a2 100644 --- a/include/mbgl/util/interpolate.hpp +++ b/include/mbgl/util/interpolate.hpp @@ -3,6 +3,7 @@ #include <mbgl/util/color.hpp> #include <mbgl/util/range.hpp> #include <mbgl/style/position.hpp> +#include <mbgl/style/expression/value.hpp> #include <array> #include <vector> @@ -47,6 +48,36 @@ public: } }; + +// In order to accept Array<Number, N> as an output value for Curve +// expressions, we need to have an interpolatable std::vector type. +// However, style properties like line-dasharray are represented using +// std::vector<float>, and should NOT be considered interpolatable. +// So, we use std::vector<Value> to represent expression array values, +// asserting that (a) the vectors are the same size, and (b) they contain +// only numeric values. (These invariants should be relatively safe, +// being enforced by the expression type system.) +template<> +struct Interpolator<std::vector<style::expression::Value>> { + std::vector<style::expression::Value> operator()(const std::vector<style::expression::Value>& a, + const std::vector<style::expression::Value>& b, + const double t) const { + assert(a.size() == b.size()); + if (a.size() == 0) return {}; + std::vector<style::expression::Value> result; + for (std::size_t i = 0; i < a.size(); i++) { + assert(a[i].template is<double>()); + assert(b[i].template is<double>()); + style::expression::Value item = interpolate( + a[i].template get<double>(), + b[i].template get<double>(), + t); + result.push_back(item); + } + return result; + } +}; + template <> struct Interpolator<style::Position> { public: @@ -101,5 +132,7 @@ struct Interpolatable std::true_type, std::false_type> {}; + + } // namespace util } // namespace mbgl diff --git a/include/mbgl/util/optional.hpp b/include/mbgl/util/optional.hpp index a9374a1b53..abec02dca9 100644 --- a/include/mbgl/util/optional.hpp +++ b/include/mbgl/util/optional.hpp @@ -7,4 +7,7 @@ namespace mbgl { template <typename T> using optional = std::experimental::optional<T>; +using nullopt_t = std::experimental::nullopt_t; +constexpr nullopt_t nullopt = std::experimental::nullopt; + } // namespace mbgl diff --git a/include/mbgl/util/projection.hpp b/include/mbgl/util/projection.hpp index a9c12e595b..b4a34521a4 100644 --- a/include/mbgl/util/projection.hpp +++ b/include/mbgl/util/projection.hpp @@ -96,8 +96,8 @@ public: const double t2z = tileSize * std::pow(2, zoom); Point<double> pt = project_(point, t2z); // Flip y coordinate - auto x = std::round(std::min(pt.x, t2z)); - auto y = std::round(std::min(t2z - pt.y, t2z)); + auto x = ::round(std::min(pt.x, t2z)); + auto y = ::round(std::min(t2z - pt.y, t2z)); return { x, y }; } private: diff --git a/include/mbgl/util/run_loop.hpp b/include/mbgl/util/run_loop.hpp index acbea80273..381e3ae213 100644 --- a/include/mbgl/util/run_loop.hpp +++ b/include/mbgl/util/run_loop.hpp @@ -26,6 +26,11 @@ public: New, }; + enum class Priority : bool { + Default = false, + High = true, + }; + enum class Event : uint8_t { None = 0, Read = 1, @@ -49,9 +54,14 @@ public: // Invoke fn(args...) on this RunLoop. template <class Fn, class... Args> + void invoke(Priority priority, Fn&& fn, Args&&... args) { + push(priority, WorkTask::make(std::forward<Fn>(fn), std::forward<Args>(args)...)); + } + + // Invoke fn(args...) on this RunLoop. + template <class Fn, class... Args> void invoke(Fn&& fn, Args&&... args) { - std::shared_ptr<WorkTask> task = WorkTask::make(std::forward<Fn>(fn), std::forward<Args>(args)...); - push(task); + invoke(Priority::Default, std::forward<Fn>(fn), std::forward<Args>(args)...); } // Post the cancellable work fn(args...) to this RunLoop. @@ -59,7 +69,7 @@ public: std::unique_ptr<AsyncRequest> invokeCancellable(Fn&& fn, Args&&... args) { std::shared_ptr<WorkTask> task = WorkTask::make(std::forward<Fn>(fn), std::forward<Args>(args)...); - push(task); + push(Priority::Default, task); return std::make_unique<WorkRequest>(task); } @@ -76,24 +86,42 @@ private: using Queue = std::queue<std::shared_ptr<WorkTask>>; - void push(std::shared_ptr<WorkTask>); + // Wakes up the RunLoop so that it starts processing items in the queue. + void wake(); - void withMutex(std::function<void()>&& fn) { + // Adds a WorkTask to the queue, and wakes it up. + void push(Priority priority, std::shared_ptr<WorkTask> task) { std::lock_guard<std::mutex> lock(mutex); - fn(); + if (priority == Priority::High) { + highPriorityQueue.emplace(std::move(task)); + } else { + defaultQueue.emplace(std::move(task)); + } + wake(); } void process() { - Queue queue_; - withMutex([&] { queue_.swap(queue); }); - - while (!queue_.empty()) { - (*(queue_.front()))(); - queue_.pop(); + std::shared_ptr<WorkTask> task; + std::unique_lock<std::mutex> lock(mutex); + while (true) { + if (!highPriorityQueue.empty()) { + task = std::move(highPriorityQueue.front()); + highPriorityQueue.pop(); + } else if (!defaultQueue.empty()) { + task = std::move(defaultQueue.front()); + defaultQueue.pop(); + } else { + break; + } + lock.unlock(); + (*task)(); + task.reset(); + lock.lock(); } } - Queue queue; + Queue defaultQueue; + Queue highPriorityQueue; std::mutex mutex; std::unique_ptr<Impl> impl; diff --git a/include/mbgl/util/string.hpp b/include/mbgl/util/string.hpp index 82d317c620..13498ccb92 100644 --- a/include/mbgl/util/string.hpp +++ b/include/mbgl/util/string.hpp @@ -25,6 +25,10 @@ inline int stoi(const std::string &str) return atoi(str.c_str()); } +inline float stof(const std::string &str) { + return static_cast<float>(atof(str.c_str())); +} + } // namespace std #endif @@ -65,5 +69,9 @@ inline std::string toString(std::exception_ptr error) { } } +inline float stof(const std::string& str) { + return std::stof(str); +} + } // namespace util } // namespace mbgl diff --git a/include/mbgl/util/thread.hpp b/include/mbgl/util/thread.hpp index 672eebf6db..74e722b02d 100644 --- a/include/mbgl/util/thread.hpp +++ b/include/mbgl/util/thread.hpp @@ -103,7 +103,7 @@ public: auto pausing = paused->get_future(); - loop->invoke([this] { + loop->invoke(RunLoop::Priority::High, [this] { auto resuming = resumed->get_future(); paused->set_value(); resuming.get(); @@ -128,26 +128,9 @@ private: MBGL_STORE_THREAD(tid); void schedule(std::weak_ptr<Mailbox> mailbox) override { - { - std::lock_guard<std::mutex> lock(mutex); - queue.push(mailbox); - } - - loop->invoke([this] { receive(); }); - } - - void receive() { - std::unique_lock<std::mutex> lock(mutex); - - auto mailbox = queue.front(); - queue.pop(); - lock.unlock(); - - Mailbox::maybeReceive(mailbox); + loop->schedule(mailbox); } - std::mutex mutex; - std::queue<std::weak_ptr<Mailbox>> queue; std::thread thread; std::unique_ptr<Actor<Object>> object; diff --git a/include/mbgl/util/tileset.hpp b/include/mbgl/util/tileset.hpp index 7bef0e89ed..1b7b8f0f75 100644 --- a/include/mbgl/util/tileset.hpp +++ b/include/mbgl/util/tileset.hpp @@ -37,6 +37,10 @@ public: return std::tie(lhs.tiles, lhs.zoomRange, lhs.attribution, lhs.scheme, lhs.bounds) == std::tie(rhs.tiles, rhs.zoomRange, rhs.attribution, rhs.scheme, rhs.bounds); } + + friend bool operator!=(const Tileset& lhs, const Tileset& rhs) { + return !(lhs == rhs); + } }; } // namespace mbgl diff --git a/include/mbgl/util/tuple.hpp b/include/mbgl/util/tuple.hpp new file mode 100644 index 0000000000..3f6e80a8c7 --- /dev/null +++ b/include/mbgl/util/tuple.hpp @@ -0,0 +1,19 @@ +#pragma once + +// Polyfill needed by Windows because MSVC STL +// is not compatible with our IndexedTuple code +#if defined(_WINDOWS) + +#include <tao/tuple/tuple.hpp> + +#define get_polyfill tao::get +#define tuple_polyfill tao::tuple + +#else + +#include <tuple> + +#define get_polyfill std::get +#define tuple_polyfill std::tuple + +#endif diff --git a/include/mbgl/util/unique_any.hpp b/include/mbgl/util/unique_any.hpp new file mode 100644 index 0000000000..d488930a03 --- /dev/null +++ b/include/mbgl/util/unique_any.hpp @@ -0,0 +1,275 @@ +#pragma once + +#include <typeinfo> +#include <type_traits> +#include <stdexcept> +namespace mbgl { +namespace util { + +class bad_any_cast : public std::bad_cast { +public: + const char* what() const noexcept override { + return "bad any_cast<>()"; + } +}; +/** + * A variant of `std::any` for non-copyable types. + * + * Use `unique_any` for non-copyable types (e.g. `std::unique_ptr<T>`) + * or to ensure that no copies are made of copyable types that are + * moved in. + * + * `uniqe_any` differs from `std::any` in that it does not support copy construction + * or copy assignment. It also does not require the contained type to be copy + * constructible. + * + * The `any_cast<T>()` methods work similar to `std::any_cast<T>()` except that + * non-copyable types may only be cast to references. + * + * Example usage: + * unique_any u1(3); + * auto u2 = unique_any(std::move(u1)); // u1 is moved from + * int i = any_cast<int>(u2); + * + * unique_any u2; + * u2 = std::unique_ptr<int>(new int); + * std::unique_ptr<int> iPtr = any_cast<std::unique_ptr<int>>(std::move(u2)); + * + * Inspired by linb::any (https://github.com/thelink2012/any) and the + * libc++ implementation (https://github.com/llvm-mirror/libcxx). + */ +class unique_any final +{ +public: + unique_any() = default; + + //Copy constructor (deleted) + unique_any(const unique_any& rhs) = delete; + + unique_any(unique_any&& rhs) : vtable(rhs.vtable) { + if (vtable) { + vtable->move(std::move(rhs.storage), storage); + } + rhs.vtable = nullptr; + } + + // Constructs with a direct-initilizated object of type ValueType + template <typename ValueType, + typename _Vt = std::decay_t<ValueType>, + typename = std::enable_if_t<!std::is_same<_Vt, unique_any>::value> > + unique_any(ValueType&& value) { + create(std::forward<ValueType>(value)); + } + + ~unique_any() { + reset(); + } + + unique_any& operator=(unique_any&& rhs) { + unique_any(std::move(rhs)).swap(*this); + return *this; + } + + template <class ValueType, + typename = std::enable_if_t<!std::is_same<std::decay_t<ValueType>, unique_any>::value> > + unique_any& operator=(ValueType&& rhs) { + unique_any(std::forward<ValueType>(rhs)).swap(*this); + return *this; + } + + void reset() { + if (vtable) { + vtable->destroy(storage); + vtable = nullptr; + } + } + + void swap(unique_any& rhs) { + if (this == &rhs) { + return; + } else { + unique_any tmp(std::move(rhs)); + rhs.vtable = vtable; + if (rhs.vtable) { + rhs.vtable->move(std::move(storage), rhs.storage); + } + vtable = tmp.vtable; + if (vtable) { + vtable->move(std::move(tmp.storage), storage); + } + } + } + + const std::type_info& type() const { + return !has_value()? typeid(void) : vtable->type(); + } + + bool has_value() const { + return vtable != nullptr; + } + +private: + + union Storage { + using StackStorage = std::aligned_storage_t<3*sizeof(void*), std::alignment_of<void*>::value>; + Storage() = default; + + void * dynamic { nullptr }; + StackStorage stack; + }; + + template<typename T> + struct AllocateOnStack : std::integral_constant<bool, + sizeof(T) <= sizeof(Storage::stack) + && std::alignment_of<T>::value <= std::alignment_of<Storage::StackStorage>::value + && std::is_nothrow_move_constructible<T>::value> { + }; + + struct VTable { + virtual ~VTable() = default; + virtual void move(Storage&& src, Storage& dest) = 0; + virtual void destroy(Storage&) = 0; + virtual const std::type_info& type() = 0; + }; + + template <typename ValueType> + struct VTableHeap : public VTable { + void move(Storage&& src, Storage& dest) override { + destroy(dest); + dest.dynamic = src.dynamic; + } + + void destroy(Storage& s) override { + if (s.dynamic) { + delete reinterpret_cast<ValueType*>(s.dynamic); + } + s.dynamic = nullptr; + } + + const std::type_info& type() override { + return typeid(ValueType); + } + }; + + template <typename ValueType> + struct VTableStack : public VTable { + void move(Storage&& src, Storage& dest) override { + auto srcValue = reinterpret_cast<ValueType&&>(src.stack); + new (static_cast<void*>(&dest.stack)) ValueType(std::move(srcValue)); + srcValue.~ValueType(); + } + + void destroy(Storage& s) override { + reinterpret_cast<ValueType&>(s.stack).~ValueType(); + } + + const std::type_info& type() override { + return typeid(ValueType); + } + }; + + template <typename ValueType> + static VTable* vtableForType() { + using VTableType = std::conditional_t<AllocateOnStack<ValueType>::value, VTableStack<ValueType>, VTableHeap<ValueType> >; + static VTableType vtable; + return &vtable; + } + + template <typename ValueType, typename _Vt> + std::enable_if_t<AllocateOnStack<_Vt>::value> + createStorage(ValueType&& value) { + new (static_cast<void*>(&storage.stack)) _Vt(std::forward<ValueType>(value)); + } + + template <typename ValueType, typename _Vt> + std::enable_if_t<!AllocateOnStack<_Vt>::value> + createStorage(ValueType&& value) { + storage.dynamic = static_cast<void*>(new _Vt(std::forward<ValueType>(value))); + } + + template <typename ValueType> + void create(ValueType&& value) { + using _Vt = std::decay_t<ValueType>; + vtable = vtableForType<_Vt>(); + createStorage<ValueType, _Vt>(std::forward<ValueType>(value)); + } + + VTable* vtable { nullptr }; + Storage storage; + +protected: + template<class ValueType> + friend const ValueType* any_cast(const unique_any* operand) ; + + template<class ValueType> + friend ValueType* any_cast(unique_any* operand) ; + + template<typename ValueType, typename _Vt = std::decay_t<ValueType> > + ValueType* cast() + { + return reinterpret_cast<ValueType *>( + AllocateOnStack<_Vt>::value ? &storage.stack : storage.dynamic); + } +}; + +template<typename ValueType> +inline const ValueType* any_cast(const unique_any* any) +{ + return any_cast<ValueType>(const_cast<unique_any *>(any)); +} + +template<typename ValueType> +inline ValueType* any_cast(unique_any* any) +{ + if(any == nullptr || any->type() != typeid(ValueType)) + return nullptr; + else + return any->cast<ValueType>(); +} + +template<typename ValueType, typename _Vt = std::decay_t<ValueType> > +inline ValueType any_cast(const unique_any& any) +{ + static_assert(std::is_constructible<ValueType, const _Vt&>::value, + "any_cast type can't construct copy of contained object"); + auto temp = any_cast<_Vt>(&any); + if (temp == nullptr) { + throw bad_any_cast(); + } + return static_cast<ValueType>(*temp); +} + +template<typename ValueType, typename _Vt = std::decay_t<ValueType> > +inline ValueType any_cast(unique_any& any) +{ + static_assert(std::is_constructible<ValueType, const _Vt&>::value, + "any_cast type can't construct copy of contained object"); + auto temp = any_cast<_Vt>(&any); + if (temp == nullptr) { + throw bad_any_cast(); + } + return static_cast<ValueType>(*temp); +} + +template<typename ValueType, typename _Vt = std::remove_cv_t<ValueType> > +inline ValueType any_cast(unique_any&& any) +{ + auto temp = any_cast<_Vt>(&any); + if (temp == nullptr) { + throw bad_any_cast(); + } + auto retValue = static_cast<ValueType>(std::move(*temp)); + any.reset(); + return std::move(retValue); +} + +} // namespace util +} // namespace mbgl + +namespace std { + +inline void swap(mbgl::util::unique_any& lhs, mbgl::util::unique_any& rhs) { + lhs.swap(rhs); +} + +} // namespace std diff --git a/include/mbgl/util/unitbezier.hpp b/include/mbgl/util/unitbezier.hpp index 6e644e2d1f..56d2ab6ead 100644 --- a/include/mbgl/util/unitbezier.hpp +++ b/include/mbgl/util/unitbezier.hpp @@ -26,6 +26,7 @@ #pragma once #include <cmath> +#include <tuple> namespace mbgl { namespace util { @@ -41,6 +42,17 @@ struct UnitBezier { , ay(1.0 - (3.0 * p1y) - (3.0 * (p2y - p1y) - (3.0 * p1y))) { } + std::pair<double, double> getP1() const { + return { cx / 3.0, cy / 3.0 }; + } + + std::pair<double, double> getP2() const { + return { + (bx + (3.0 * cx / 3.0) + cx) / 3.0, + (by + (3.0 * cy / 3.0) + cy) / 3.0, + }; + } + double sampleCurveX(double t) const { // `ax t^3 + bx t^2 + cx t' expanded using Horner's rule. return ((ax * t + bx) * t + cx) * t; @@ -102,6 +114,11 @@ struct UnitBezier { double solve(double x, double epsilon) const { return sampleCurveY(solveCurveX(x, epsilon)); } + + bool operator==(const UnitBezier& rhs) const { + return std::tie(cx, bx, ax, cy, by, ay) == + std::tie(rhs.cx, rhs.bx, rhs.ax, rhs.cy, rhs.by, rhs.ay); + } private: const double cx; |