68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
#pragma once
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#include <mbgl/shaders/shader_source.hpp>
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#include <mbgl/shaders/background_layer_ubo.hpp>
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#include <mbgl/shaders/mtl/common.hpp>
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#include <mbgl/shaders/mtl/shader_program.hpp>
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namespace mbgl {
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namespace shaders {
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struct alignas(16) ClipUBO {
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/* 0 */ std::array<float, 4 * 4> matrix;
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/* 64 */ std::uint32_t stencil_ref;
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/* 68 */ std::uint32_t pad1, pad2, pad3;
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/* 80 */
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};
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static_assert(sizeof(ClipUBO) == 5 * 16);
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template <>
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struct ShaderSource<BuiltIn::ClippingMaskProgram, gfx::Backend::Type::Metal> {
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static constexpr auto name = "ClippingMaskProgram";
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static constexpr auto vertexMainFunction = "vertexMain";
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static constexpr auto fragmentMainFunction = "fragmentMain";
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static constexpr auto hasPermutations = false;
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static const std::array<AttributeInfo, 1> attributes;
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static const std::array<UniformBlockInfo, 1> uniforms;
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static const std::array<TextureInfo, 0> textures;
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static constexpr auto source = R"(
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#include <metal_stdlib>
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using namespace metal;
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struct alignas(16) ClipUBO {
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/* 0 */ float4x4 matrix;
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/* 64 */ uint32_t stencil_ref;
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/* 68 */ uint32_t pad1, pad2, pad3;
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/* 80 */
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};
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static_assert(sizeof(ClipUBO) == 5 * 16, "unexpected padding");
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struct VertexStage {
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short2 position [[attribute(0)]];
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};
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struct FragmentStage {
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float4 position [[position, invariant]];
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};
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struct FragmentResult {
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// color output is only needed because we're using implicit stencil writes
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half4 color [[color(0)]];
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};
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FragmentStage vertex vertexMain(VertexStage in [[stage_in]],
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device const ClipUBO& clipUBO [[buffer(1)]]) {
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return { clipUBO.matrix * float4(float2(in.position.xy), 0, 1) };
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}
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half4 fragment fragmentMain(FragmentStage in [[stage_in]]) {
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return half4(1.0);
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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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