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#pragma kernel ImageSample |
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Texture2D X_tex2D; |
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SamplerState LinearClampSampler; |
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RWStructuredBuffer<float> Optr; |
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uint O_width; |
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uint O_height; |
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uint O_channels; |
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uint X_width; |
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uint X_height; |
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float4x4 affineMatrix; |
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[numthreads(8, 8, 1)] |
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void ImageSample(uint3 dispatchThreadID : SV_DispatchThreadID) |
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{ |
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uint2 O_pos = dispatchThreadID.yx; |
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if (O_pos.x >= O_width || O_pos.y >= O_height) |
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return; |
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float4 uv = mul(affineMatrix, float4(O_pos.x, O_pos.y, 1, 1)) / float4(X_width, X_height, 1, 1); |
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bool mask = uv.x >= 0 && uv.x <= 1 && uv.y >= 0 && uv.y <= 1; |
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float4 c = mask * X_tex2D.SampleLevel(LinearClampSampler, uv.xy, 0); |
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// SRGB conversion |
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bool3 maskRGB = c.rgb > 0.0031308f; |
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c.rgb = lerp(12.92f * c.rgb, 1.055f * (pow(abs(c.rgb), 0.41666666666f) - 0.055f), maskRGB); |
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Optr[(O_pos.y * O_width + O_pos.x) * O_channels + 0] = c.x; |
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Optr[(O_pos.y * O_width + O_pos.x) * O_channels + 1] = c.y; |
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Optr[(O_pos.y * O_width + O_pos.x) * O_channels + 2] = c.z; |
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} |
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