73 lines
2.6 KiB
HLSL
73 lines
2.6 KiB
HLSL
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#ifndef blur
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#define blur
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void Blur_float(Texture2D tex, sampler samplertex, float strength, float radius, float iterations, float2 uv, float2 screenSize, out float4 color)
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{
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// Sample the surrounding pixels using a 5x5 kernel
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color = 0.0;
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float weightSum = 0.0;
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float widthCorrection = screenSize.x / screenSize.y;
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UNITY_LOOP
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//[unroll]
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for (int y = -iterations; y <= iterations; y++)
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{
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UNITY_LOOP
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for (int x = -iterations; x <= iterations; x++)
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{
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// Calculate the weight for the current pixel using the Gaussian function
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float weight = exp(-((x * x) + (y * y)) / (2 * (strength * strength))) / (2 * 3.141592 * (strength * strength));
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// Sample the pixel at the current offset
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//float4 texSample = tex2D(tex, uv + float2(x, y));
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float4 texSample = SAMPLE_TEXTURE2D(tex, samplertex, uv + (float2(x, y) * float2(radius / widthCorrection, radius)));
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// Accumulate the weighted pixel value
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color += texSample * weight;
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weightSum += weight;
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}
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}
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// Normalize the color by the sum of the weights
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color /= weightSum;
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return;
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}
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//void Blur_float(Texture2D tex, sampler samplertex, float strength, float radius, float iterations, float2 uv, float2 screenSize, out float4 color)
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//{
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// // Sample the surrounding pixels using a 5x5 kernel
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// color = 0.0;
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// float weightSum = 0.0;
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//
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// float widthCorrection = screenSize.x / screenSize.y;
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//
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// for (int y = -iterations; y <= iterations; y++)
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// {
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// for (int x = -iterations; x <= iterations; x++)
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// {
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// // Sample the pixel at the current offset
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// float4 s = SAMPLE_TEXTURE2D(tex, samplertex, uv + (float2(x, y) * float2(radius / widthCorrection, radius)));
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//
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// // Calculate the intensity difference between the center pixel and the current pixel
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// float intensityDiff = abs(SAMPLE_TEXTURE2D(tex, samplertex, uv).r - s.r);
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//
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// // Calculate the spatial distance between the center pixel and the current pixel
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// float spatialDiff = sqrt((x * x) + (y * y));
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//
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// // Calculate the weight for the current pixel using the bilateral filter function
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// float weight = exp(-intensityDiff / 2) * exp(-spatialDiff / 2);
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//
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// // Accumulate the weighted pixel value
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// color += s * weight;
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// weightSum += weight;
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// }
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// }
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//
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// // Normalize the color by the sum of the weights
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// color /= weightSum;
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//
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// return;
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//}
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#endif
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