70 lines
1.8 KiB
C++
70 lines
1.8 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 debugShaderPrelude = R"(#define idDebugUBO drawableReservedUBOCount)";
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template <>
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struct ShaderSource<BuiltIn::DebugShader, gfx::Backend::Type::Vulkan> {
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static constexpr const char* name = "DebugShader";
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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, 1> textures;
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static constexpr auto prelude = debugShaderPrelude;
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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 = DRAWABLE_UBO_SET_INDEX, binding = idDebugUBO) uniform DebugUBO {
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mat4 matrix;
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vec4 color;
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float overlay_scale;
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float pad1;
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float pad2;
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float pad3;
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} debug;
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layout(location = 0) out vec2 frag_uv;
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void main() {
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gl_Position = debug.matrix * vec4(in_position * debug.overlay_scale, 0, 1);
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applySurfaceTransform();
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// This vertex shader expects a EXTENT x EXTENT quad,
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// The UV co-ordinates for the overlay texture can be calculated using that knowledge
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frag_uv = in_position / 8192.0;
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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_uv;
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layout(location = 0) out vec4 out_color;
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layout(set = DRAWABLE_UBO_SET_INDEX, binding = idDebugUBO) uniform DebugUBO {
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mat4 matrix;
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vec4 color;
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float overlay_scale;
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float pad1;
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float pad2;
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float pad3;
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} debug;
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layout(set = DRAWABLE_IMAGE_SET_INDEX, binding = 0) uniform sampler2D image_sampler;
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void main() {
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vec4 overlay_color = texture(image_sampler, frag_uv);
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out_color = mix(debug.color, overlay_color, overlay_color.a);
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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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