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Small optimisation: move distance==0 comparison to outer loop, to check once per call instead of once per pixel

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This commit is contained in:
Hugo van Kemenade 2020-09-09 10:08:46 +03:00
parent c83ffc6aea
commit 68da661db9
1 changed files with 8 additions and 4 deletions
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12
src/libImaging/Effects.c
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@ -131,11 +131,15 @@ ImagingEffectSpread(Imaging imIn, int distance)
}
#define SPREAD(type, image)\
for (y = 0; y < imOut->ysize; y++) {\
for (x = 0; x < imOut->xsize; x++) {\
if (distance == 0) {\
if (distance == 0) {\
for (y = 0; y < imOut->ysize; y++) {\
for (x = 0; x < imOut->xsize; x++) {\
imOut->image[y][x] = imIn->image[y][x];\
} else {\
}\
}\
} else {\
for (y = 0; y < imOut->ysize; y++) {\
for (x = 0; x < imOut->xsize; x++) {\
int xx = x + (rand() % distance) - distance/2;\
int yy = y + (rand() % distance) - distance/2;\
if (xx >= 0 && xx < imIn->xsize && yy >= 0 && yy < imIn->ysize) {\