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#pragma once
#include <mbgl/geometry/binpack.hpp>
#include <mbgl/gl/texture.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/optional.hpp>
#include <mbgl/style/image.hpp>
#include <string>
#include <set>
#include <unordered_map>
#include <array>
#include <memory>
namespace mbgl {
namespace gl {
class Context;
} // namespace gl
class SpriteAtlasElement {
public:
SpriteAtlasElement(Rect<uint16_t>, const style::Image::Impl&, Size size, float pixelRatio);
Rect<uint16_t> pos;
bool sdf;
float relativePixelRatio;
std::array<float, 2> size;
std::array<float, 2> tl;
std::array<float, 2> br;
float width;
float height;
};
using IconMap = std::unordered_map<std::string, SpriteAtlasElement>;
using IconDependencies = std::set<std::string>;
class IconRequestor {
public:
virtual void onIconsAvailable(IconMap) = 0;
};
class SpriteAtlas : public util::noncopyable {
public:
SpriteAtlas(Size, float pixelRatio);
~SpriteAtlas();
void onSpriteLoaded();
void markAsLoaded() {
loaded = true;
}
bool isLoaded() const {
return loaded;
}
void dumpDebugLogs() const;
const style::Image::Impl* getImage(const std::string&) const;
void addImage(Immutable<style::Image::Impl>);
void removeImage(const std::string&);
void getIcons(IconRequestor& requestor);
void removeRequestor(IconRequestor& requestor);
optional<SpriteAtlasElement> getIcon(const std::string& name);
optional<SpriteAtlasElement> getPattern(const std::string& name);
// Binds the atlas texture to the GPU, and uploads data if it is out of date.
void bind(bool linear, gl::Context&, gl::TextureUnit unit);
// Uploads the texture to the GPU to be available when we need it. This is a lazy operation;
// the texture is only bound when the data is out of date (=dirty).
void upload(gl::Context&, gl::TextureUnit unit);
Size getSize() const { return size; }
float getPixelRatio() const { return pixelRatio; }
// Only for use in tests.
const PremultipliedImage& getAtlasImage() const {
return image;
}
private:
const Size size;
const float pixelRatio;
bool loaded = false;
struct Entry {
Immutable<style::Image::Impl> image;
// One sprite image might be used as both an icon image and a pattern image. If so,
// it must have two distinct entries in the texture. The one for the icon image has
// a single pixel transparent border, and the one for the pattern image has a single
// pixel border wrapped from the opposite side.
optional<Rect<uint16_t>> iconRect;
optional<Rect<uint16_t>> patternRect;
};
optional<SpriteAtlasElement> getImage(const std::string& name, optional<Rect<uint16_t>> Entry::*rect);
void copy(const Entry&, optional<Rect<uint16_t>> Entry::*rect);
IconMap buildIconMap();
std::unordered_map<std::string, Entry> entries;
BinPack<uint16_t> bin;
PremultipliedImage image;
mbgl::optional<gl::Texture> texture;
bool dirty;
std::set<IconRequestor*> requestors;
IconMap icons;
};
} // namespace mbgl
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