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395f665a13
It is desirable for us to use a shader for blits to allow easily emulating out of bounds blits and blits between different swizzled colour formats. The helper shader infrastructure is designed to be generic so it can be reused by any other helper shaders that we may need in the future.
22 lines
606 B
GLSL
22 lines
606 B
GLSL
#version 460
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layout (binding = 0, set = 0) uniform sampler2D src;
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layout (location = 0) in vec2 dstUV;
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layout (location = 0) out vec4 colour;
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layout (push_constant) uniform constants {
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layout (offset = 16)
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vec2 srcOriginUV;
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vec2 dstSrcScaleFactor;
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float srcHeightRecip;
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} PC;
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void main()
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{
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vec2 srcUV = dstUV * PC.dstSrcScaleFactor + PC.srcOriginUV;
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// Account for out of bounds blits by moving to the next line of the source texture for the copy
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srcUV.y += floor(srcUV.x) * PC.srcHeightRecip;
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srcUV.x = srcUV.x - floor(srcUV.x);
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colour.rgba = texture(src, srcUV);
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}
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