blob: fa09ee2e8238987f6d92601b21e6322e2360b737 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
#ifndef MBGL_STYLE_STYLE_LAYER
#define MBGL_STYLE_STYLE_LAYER
#include <mbgl/style/types.hpp>
#include <mbgl/style/filter_expression.hpp>
#include <mbgl/renderer/render_pass.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/rapidjson.hpp>
#include <memory>
#include <string>
#include <limits>
namespace mbgl {
class StyleCascadeParameters;
class StyleCalculationParameters;
class StyleBucketParameters;
class Bucket;
class StyleLayer {
public:
virtual ~StyleLayer() = default;
// Check whether this layer is of the given subtype.
template <class T>
bool is() const;
// Dynamically cast this layer to the given subtype.
template <class T>
T* as() {
return is<T>() ? reinterpret_cast<T*>(this) : nullptr;
}
template <class T>
const T* as() const {
return is<T>() ? reinterpret_cast<const T*>(this) : nullptr;
}
// Create a copy of this layer.
virtual std::unique_ptr<StyleLayer> clone() const = 0;
virtual void parseLayout(const JSValue& value) = 0;
virtual void parsePaints(const JSValue& value) = 0;
// If the layer has a ref, the ref. Otherwise, the id.
const std::string& bucketName() const;
// Partially evaluate paint properties based on a set of classes.
virtual void cascade(const StyleCascadeParameters&) = 0;
// Fully evaluate cascaded paint properties based on a zoom level.
// Returns true if any paint properties have active transitions.
virtual bool recalculate(const StyleCalculationParameters&) = 0;
virtual std::unique_ptr<Bucket> createBucket(StyleBucketParameters&) const = 0;
// Checks whether this layer needs to be rendered in the given render pass.
bool hasRenderPass(RenderPass) const;
// Checks whether this layer can be rendered.
bool needsRendering() const;
public:
std::string id;
std::string ref;
std::string source;
std::string sourceLayer;
FilterExpression filter;
float minZoom = -std::numeric_limits<float>::infinity();
float maxZoom = std::numeric_limits<float>::infinity();
VisibilityType visibility = VisibilityType::Visible;
protected:
enum class Type {
Fill,
Line,
Circle,
Symbol,
Raster,
Background,
Custom,
};
StyleLayer(Type type_) : type(type_) {}
StyleLayer(const StyleLayer&) = default;
StyleLayer& operator=(const StyleLayer&) = delete;
const Type type;
// Stores what render passes this layer is currently enabled for. This depends on the
// evaluated StyleProperties object and is updated accordingly.
RenderPass passes = RenderPass::None;
};
} // namespace mbgl
#endif
|