46 lines
1.0 KiB
Metal
46 lines
1.0 KiB
Metal
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#include <metal_stdlib>
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#include <simd/simd.h>
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#include <metal_math>
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using namespace metal;
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/* For GLSL compatibility */
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typedef float2 vec2;
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typedef float3 vec3;
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typedef float4 vec4;
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typedef struct {
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float4 position [[position]];
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float2 texcoords;
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} rasterizer_data;
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// Vertex Function
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vertex rasterizer_data vertex_shader(uint index [[ vertex_id ]],
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constant vector_float2 *vertices [[ buffer(0) ]])
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{
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rasterizer_data out;
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out.position.xy = vertices[index].xy;
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out.position.z = 0.0;
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out.position.w = 1.0;
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out.texcoords = (vertices[index].xy + float2(1, 1)) / 2.0;
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return out;
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}
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static inline float4 texture(texture2d<half> texture, float2 pos)
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{
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constexpr sampler texture_sampler;
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return float4(texture.sample(texture_sampler, pos));
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}
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fragment float4 fragment_shader(rasterizer_data in [[stage_in]],
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texture2d<half> image [[ texture(0) ]])
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{
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in.texcoords.y = 1 - in.texcoords.y;
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return texture(image, in.texcoords);
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}
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