101 lines
4.1 KiB
Metal
101 lines
4.1 KiB
Metal
// Automatically generated from files in pathfinder/shaders/. Do not edit!
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#pragma clang diagnostic ignored "-Wmissing-prototypes"
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#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct bFills
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{
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uint iFills[1];
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};
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struct bAlphaTiles
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{
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uint iAlphaTiles[1];
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};
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struct bTiles
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{
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uint iTiles[1];
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};
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constant uint3 gl_WorkGroupSize [[maybe_unused]] = uint3(16u, 4u, 1u);
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static inline __attribute__((always_inline))
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float4 computeCoverage(thread const float2& from, thread const float2& to, thread const texture2d<float> areaLUT, thread const sampler areaLUTSmplr)
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{
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float2 left = select(to, from, bool2(from.x < to.x));
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float2 right = select(from, to, bool2(from.x < to.x));
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float2 window = fast::clamp(float2(from.x, to.x), float2(-0.5), float2(0.5));
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float offset = mix(window.x, window.y, 0.5) - left.x;
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float t = offset / (right.x - left.x);
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float y = mix(left.y, right.y, t);
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float d = (right.y - left.y) / (right.x - left.x);
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float dX = window.x - window.y;
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return areaLUT.sample(areaLUTSmplr, (float2(y + 8.0, abs(d * dX)) / float2(16.0)), level(0.0)) * dX;
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}
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static inline __attribute__((always_inline))
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float4 accumulateCoverageForFillList(thread int& fillIndex, thread const int2& tileSubCoord, const device bFills& v_148, thread texture2d<float> uAreaLUT, thread const sampler uAreaLUTSmplr)
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{
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float2 tileFragCoord = float2(tileSubCoord) + float2(0.5);
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float4 coverages = float4(0.0);
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int iteration = 0;
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do
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{
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uint fillFrom = v_148.iFills[(fillIndex * 3) + 0];
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uint fillTo = v_148.iFills[(fillIndex * 3) + 1];
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float4 lineSegment = float4(float(fillFrom & 65535u), float(fillFrom >> uint(16)), float(fillTo & 65535u), float(fillTo >> uint(16))) / float4(256.0);
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lineSegment -= tileFragCoord.xyxy;
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float2 param = lineSegment.xy;
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float2 param_1 = lineSegment.zw;
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coverages += computeCoverage(param, param_1, uAreaLUT, uAreaLUTSmplr);
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fillIndex = int(v_148.iFills[(fillIndex * 3) + 2]);
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iteration++;
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} while ((fillIndex >= 0) && (iteration < 1024));
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return coverages;
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}
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static inline __attribute__((always_inline))
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int2 computeTileCoord(thread const uint& alphaTileIndex, thread uint3& gl_LocalInvocationID)
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{
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uint x = alphaTileIndex & 255u;
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uint y = (alphaTileIndex >> 8u) & (255u + (((alphaTileIndex >> 16u) & 255u) << 8u));
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return (int2(16, 4) * int2(int(x), int(y))) + int2(gl_LocalInvocationID.xy);
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}
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kernel void main0(constant int2& uAlphaTileRange [[buffer(1)]], const device bFills& v_148 [[buffer(0)]], const device bAlphaTiles& _284 [[buffer(2)]], device bTiles& _294 [[buffer(3)]], texture2d<float> uAreaLUT [[texture(0)]], texture2d<float, access::read_write> uDest [[texture(1)]], sampler uAreaLUTSmplr [[sampler(0)]], uint3 gl_LocalInvocationID [[thread_position_in_threadgroup]], uint3 gl_WorkGroupID [[threadgroup_position_in_grid]])
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{
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int2 tileSubCoord = int2(gl_LocalInvocationID.xy) * int2(1, 4);
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uint batchAlphaTileIndex = gl_WorkGroupID.x | (gl_WorkGroupID.y << uint(15));
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uint alphaTileIndex = batchAlphaTileIndex + uint(uAlphaTileRange.x);
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if (alphaTileIndex >= uint(uAlphaTileRange.y))
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{
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return;
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}
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uint tileIndex = _284.iAlphaTiles[(batchAlphaTileIndex * 2u) + 0u];
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if ((int(_294.iTiles[(tileIndex * 4u) + 2u] << uint(8)) >> 8) < 0)
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{
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return;
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}
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int fillIndex = int(_294.iTiles[(tileIndex * 4u) + 1u]);
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int backdrop = int(_294.iTiles[(tileIndex * 4u) + 3u]) >> 24;
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float4 coverages = float4(float(backdrop));
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int param = fillIndex;
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int2 param_1 = tileSubCoord;
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float4 _334 = accumulateCoverageForFillList(param, param_1, v_148, uAreaLUT, uAreaLUTSmplr);
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coverages += _334;
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coverages = fast::clamp(abs(coverages), float4(0.0), float4(1.0));
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int clipTileIndex = int(_284.iAlphaTiles[(batchAlphaTileIndex * 2u) + 1u]);
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if (clipTileIndex >= 0)
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{
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uint param_2 = uint(clipTileIndex);
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coverages = fast::min(coverages, uDest.read(uint2(computeTileCoord(param_2, gl_LocalInvocationID))));
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}
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uint param_3 = alphaTileIndex;
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uDest.write(coverages, uint2(computeTileCoord(param_3, gl_LocalInvocationID)));
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}
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