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Fix box blur symmetry & simplify code (#3631)

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Romash 2023-12-13 23:21:08 +03:00 committed by GitHub
parent 6083d2b9f3
commit 222f6f7877
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1 changed files with 18 additions and 28 deletions
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46
src/rtextures.c
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@ -1959,29 +1959,24 @@ void ImageBlurGaussian(Image *image, int blurSize) {
float avgG = 0.0f;
float avgB = 0.0f;
float avgAlpha = 0.0f;
int convolutionSize = blurSize+1;
int convolutionSize = blurSize;
for (int i = 0; i < blurSize+1; i++)
for (int i = 0; i < blurSize; i++)
{
avgR += pixelsCopy1[row*image->width + i].x;
avgG += pixelsCopy1[row*image->width + i].y;
avgB += pixelsCopy1[row*image->width + i].z;
avgAlpha += pixelsCopy1[row*image->width + i].w;
}
}
pixelsCopy2[row*image->width].x = avgR/convolutionSize;
pixelsCopy2[row*image->width].y = avgG/convolutionSize;
pixelsCopy2[row*image->width].z = avgB/convolutionSize;
pixelsCopy2[row*image->width].w = avgAlpha/convolutionSize;
for (int x = 1; x < image->width; x++)
for (int x = 0; x < image->width; x++)
{
if (x-blurSize >= 0)
if (x-blurSize-1 >= 0)
{
avgR -= pixelsCopy1[row*image->width + x-blurSize].x;
avgG -= pixelsCopy1[row*image->width + x-blurSize].y;
avgB -= pixelsCopy1[row*image->width + x-blurSize].z;
avgAlpha -= pixelsCopy1[row*image->width + x-blurSize].w;
avgR -= pixelsCopy1[row*image->width + x-blurSize-1].x;
avgG -= pixelsCopy1[row*image->width + x-blurSize-1].y;
avgB -= pixelsCopy1[row*image->width + x-blurSize-1].z;
avgAlpha -= pixelsCopy1[row*image->width + x-blurSize-1].w;
convolutionSize--;
}
@ -1999,7 +1994,7 @@ void ImageBlurGaussian(Image *image, int blurSize) {
pixelsCopy2[row*image->width + x].z = avgB/convolutionSize;
pixelsCopy2[row*image->width + x].w = avgAlpha/convolutionSize;
}
}
}
// Vertical motion blur
for (int col = 0; col < image->width; col++)
@ -2008,9 +2003,9 @@ void ImageBlurGaussian(Image *image, int blurSize) {
float avgG = 0.0f;
float avgB = 0.0f;
float avgAlpha = 0.0f;
int convolutionSize = blurSize+1;
int convolutionSize = blurSize;
for (int i = 0; i < blurSize+1; i++)
for (int i = 0; i < blurSize; i++)
{
avgR += pixelsCopy2[i*image->width + col].x;
avgG += pixelsCopy2[i*image->width + col].y;
@ -2018,19 +2013,14 @@ void ImageBlurGaussian(Image *image, int blurSize) {
avgAlpha += pixelsCopy2[i*image->width + col].w;
}
pixelsCopy1[col].x = (unsigned char) (avgR/convolutionSize);
pixelsCopy1[col].y = (unsigned char) (avgG/convolutionSize);
pixelsCopy1[col].z = (unsigned char) (avgB/convolutionSize);
pixelsCopy1[col].w = (unsigned char) (avgAlpha/convolutionSize);
for (int y = 1; y < image->height; y++)
for (int y = 0; y < image->height; y++)
{
if (y-blurSize >= 0)
if (y-blurSize-1 >= 0)
{
avgR -= pixelsCopy2[(y-blurSize)*image->width + col].x;
avgG -= pixelsCopy2[(y-blurSize)*image->width + col].y;
avgB -= pixelsCopy2[(y-blurSize)*image->width + col].z;
avgAlpha -= pixelsCopy2[(y-blurSize)*image->width + col].w;
avgR -= pixelsCopy2[(y-blurSize-1)*image->width + col].x;
avgG -= pixelsCopy2[(y-blurSize-1)*image->width + col].y;
avgB -= pixelsCopy2[(y-blurSize-1)*image->width + col].z;
avgAlpha -= pixelsCopy2[(y-blurSize-1)*image->width + col].w;
convolutionSize--;
}
if (y+blurSize < image->height)