30 lines
1.3 KiB
Plaintext
30 lines
1.3 KiB
Plaintext
float hash21(float2 p)
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{
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return frac(sin(dot(p, float2(127.1, 311.7))) * 43758.5453123);
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}
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float4 shadeVideo(ShaderContext context)
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{
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float2 blocks = max(blockCount, float2(1.0, 1.0));
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float2 blockId = floor(context.uv * blocks);
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float seed = context.startupRandom * 4096.0;
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float frameSeed = floor(context.time * 8.0);
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float n = hash21(blockId + float2(frameSeed + seed, frameSeed + seed * 0.17));
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float historyFrame = floor(lerp(1.0, 7.0, n));
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float rowNoise = hash21(float2(floor(context.uv.y * blocks.y) + seed * 0.37, floor(context.time * 5.0) + seed * 0.13));
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float tear = (rowNoise * 2.0 - 1.0) * tearAmount * amount * 0.08;
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float2 offset = float2(tear, (hash21(blockId + float2(19.0 + seed, 19.0 + seed * 0.31)) * 2.0 - 1.0) * amount * 0.025);
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float2 moshedUv = clamp(context.uv + offset, 0.0, 1.0);
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float4 previous = sampleTemporalHistory(int(historyFrame), moshedUv);
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float2 chromaOffset = float2(chromaShift / max(context.outputResolution.x, 1.0), 0.0) * amount;
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float r = sampleVideo(clamp(context.uv + chromaOffset, 0.0, 1.0)).r;
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float b = sampleVideo(clamp(context.uv - chromaOffset, 0.0, 1.0)).b;
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float3 current = float3(r, context.sourceColor.g, b);
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float blockMask = step(0.35, n) * amount;
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float3 color = lerp(current, previous.rgb, blockMask);
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return float4(saturate(color), context.sourceColor.a);
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}
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