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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
#include <mbgl/renderer/layers/render_background_layer.hpp>
#include <mbgl/style/layers/background_layer_impl.hpp>
#include <mbgl/renderer/bucket.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/renderer/image_manager.hpp>
#include <mbgl/renderer/render_static_data.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/programs/background_program.hpp>
#include <mbgl/util/tile_cover.hpp>
#include <mbgl/map/transform_state.hpp>
#include <mbgl/gfx/context.hpp>
namespace mbgl {
using namespace style;
RenderBackgroundLayer::RenderBackgroundLayer(Immutable<style::BackgroundLayer::Impl> _impl)
: RenderLayer(std::move(_impl)),
unevaluated(impl().paint.untransitioned()) {
}
const style::BackgroundLayer::Impl& RenderBackgroundLayer::impl() const {
return static_cast<const style::BackgroundLayer::Impl&>(*baseImpl);
}
void RenderBackgroundLayer::transition(const TransitionParameters ¶meters) {
unevaluated = impl().paint.transitioned(parameters, std::move(unevaluated));
}
void RenderBackgroundLayer::evaluate(const PropertyEvaluationParameters ¶meters) {
evaluated = unevaluated.evaluate(parameters);
crossfade = parameters.getCrossfadeParameters();
passes = evaluated.get<style::BackgroundOpacity>() > 0 ? RenderPass::Translucent
: RenderPass::None;
}
bool RenderBackgroundLayer::hasTransition() const {
return unevaluated.hasTransition();
}
bool RenderBackgroundLayer::hasCrossfade() const {
return crossfade.t != 1;
}
void RenderBackgroundLayer::render(PaintParameters& parameters, RenderSource*) {
// Note that for bottommost layers without a pattern, the background color is drawn with
// glClear rather than this method.
const Properties<>::PossiblyEvaluated properties;
const BackgroundProgram::Binders paintAttributeData(properties, 0);
auto draw = [&](auto& program, auto&& uniformValues, const auto& textureBindings) {
const auto allUniformValues = program.computeAllUniformValues(
std::move(uniformValues),
paintAttributeData,
properties,
parameters.state.getZoom()
);
const auto allAttributeBindings = program.computeAllAttributeBindings(
parameters.staticData.tileVertexBuffer,
paintAttributeData,
properties
);
checkRenderability(parameters, program.activeBindingCount(allAttributeBindings));
program.draw(
parameters.context,
gfx::Triangles(),
parameters.depthModeForSublayer(0, gfx::DepthMaskType::ReadOnly),
gfx::StencilMode::disabled(),
parameters.colorModeForRenderPass(),
gfx::CullFaceMode::disabled(),
parameters.staticData.quadTriangleIndexBuffer,
parameters.staticData.tileTriangleSegments,
allUniformValues,
allAttributeBindings,
textureBindings,
getID()
);
};
if (!evaluated.get<BackgroundPattern>().to.empty()) {
optional<ImagePosition> imagePosA = parameters.imageManager.getPattern(evaluated.get<BackgroundPattern>().from);
optional<ImagePosition> imagePosB = parameters.imageManager.getPattern(evaluated.get<BackgroundPattern>().to);
if (!imagePosA || !imagePosB)
return;
for (const auto& tileID : util::tileCover(parameters.state, parameters.state.getIntegerZoom())) {
draw(
parameters.programs.getBackgroundLayerPrograms().backgroundPattern,
BackgroundPatternProgram::layoutUniformValues(
parameters.matrixForTile(tileID),
evaluated.get<BackgroundOpacity>(),
parameters.imageManager.getPixelSize(),
*imagePosA,
*imagePosB,
crossfade,
tileID,
parameters.state
),
BackgroundPatternProgram::TextureBindings{
textures::u_image::Value{ parameters.imageManager.textureBinding(parameters.context) },
}
);
}
} else {
for (const auto& tileID : util::tileCover(parameters.state, parameters.state.getIntegerZoom())) {
draw(
parameters.programs.getBackgroundLayerPrograms().background,
BackgroundProgram::LayoutUniformValues {
uniforms::u_matrix::Value( parameters.matrixForTile(tileID) ),
uniforms::u_color::Value( evaluated.get<BackgroundColor>() ),
uniforms::u_opacity::Value( evaluated.get<BackgroundOpacity>() ),
},
BackgroundProgram::TextureBindings{}
);
}
}
}
optional<Color> RenderBackgroundLayer::getSolidBackground() const {
if (!evaluated.get<BackgroundPattern>().from.empty()) {
return nullopt;
}
return { evaluated.get<BackgroundColor>() * evaluated.get<BackgroundOpacity>() };
}
} // namespace mbgl
|
