49 lines
1.1 KiB
GLSL
49 lines
1.1 KiB
GLSL
#version {{version}}
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// Automatically generated from files in pathfinder/shaders/. Do not edit!
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precision highp float;
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uniform mat4 uTransform;
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uniform vec2 uTileSize;
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uniform vec2 uStencilTextureSize;
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in uvec2 aTessCoord;
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in uvec3 aTileOrigin;
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in vec2 aColorTexCoord;
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in int aBackdrop;
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in int aTileIndex;
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out vec2 vMaskTexCoord;
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out vec2 vColorTexCoord;
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out float vBackdrop;
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vec2 computeTileOffset(uint tileIndex, float stencilTextureWidth){
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uint tilesPerRow = uint(stencilTextureWidth / uTileSize . x);
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uvec2 tileOffset = uvec2(tileIndex % tilesPerRow, tileIndex / tilesPerRow);
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return vec2(tileOffset)* uTileSize;
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}
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void main(){
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vec2 origin = vec2(aTileOrigin . xy)+ vec2(aTileOrigin . z & 15u, aTileOrigin . z >> 4u)* 256.0;
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vec2 position =(origin + vec2(aTessCoord))* uTileSize;
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vec2 maskTexCoordOrigin = computeTileOffset(uint(aTileIndex), uStencilTextureSize . x);
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vec2 maskTexCoord = maskTexCoordOrigin + aTessCoord * uTileSize;
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vMaskTexCoord = maskTexCoord / uStencilTextureSize;
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vColorTexCoord = aColorTexCoord;
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vBackdrop = float(aBackdrop);
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gl_Position = uTransform * vec4(position, 0.0, 1.0);
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}
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