75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
#pragma once
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#include <mbgl/shaders/shader_source.hpp>
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#include <mbgl/shaders/vulkan/shader_program.hpp>
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namespace mbgl {
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namespace shaders {
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constexpr auto heatmapTextureShaderPrelude = R"(#define idHeatmapTexturePropsUBO layerUBOStartId)";
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template <>
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struct ShaderSource<BuiltIn::HeatmapTextureShader, gfx::Backend::Type::Vulkan> {
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static constexpr const char* name = "HeatmapTextureShader";
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static const std::array<AttributeInfo, 1> attributes;
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static constexpr std::array<AttributeInfo, 0> instanceAttributes{};
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static const std::array<TextureInfo, 2> textures;
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static constexpr auto prelude = heatmapTextureShaderPrelude;
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static constexpr auto vertex = R"(
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layout(location = 0) in ivec2 in_position;
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layout(set = LAYER_SET_INDEX, binding = idHeatmapTexturePropsUBO) uniform HeatmapTexturePropsUBO {
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mat4 matrix;
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float opacity;
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float pad1;
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float pad2;
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float pad3;
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} props;
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layout(location = 0) out vec2 frag_position;
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void main() {
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gl_Position = props.matrix * vec4(in_position * paintParams.world_size, 0, 1);
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applySurfaceTransform();
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frag_position = in_position;
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}
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)";
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static constexpr auto fragment = R"(
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layout(location = 0) in vec2 frag_position;
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layout(location = 0) out vec4 out_color;
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layout(set = LAYER_SET_INDEX, binding = idHeatmapTexturePropsUBO) uniform HeatmapTexturePropsUBO {
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mat4 matrix;
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float opacity;
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float pad1;
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float pad2;
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float pad3;
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} props;
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layout(set = DRAWABLE_IMAGE_SET_INDEX, binding = 0) uniform sampler2D image_sampler;
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layout(set = DRAWABLE_IMAGE_SET_INDEX, binding = 1) uniform sampler2D color_ramp_sampler;
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void main() {
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#if defined(OVERDRAW_INSPECTOR)
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out_color = vec4(1.0);
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return;
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#endif
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const float t = texture(image_sampler, frag_position).r;
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const vec4 color = texture(color_ramp_sampler, vec2(t, 0.5));
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out_color = color * props.opacity;
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}
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)";
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};
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} // namespace shaders
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} // namespace mbgl
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