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REVIEWED: ImageCrop() #1218

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Further optimization, moving data line-by-line
Old optimization left for reference
This commit is contained in:
raysan5 2020-06-07 12:57:57 +02:00
parent b7d53ce314
commit b5174a9990
1 changed files with 10 additions and 0 deletions
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10
src/textures.c
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@ -794,6 +794,15 @@ void ImageCrop(Image *image, Rectangle crop)
unsigned char *croppedData = (unsigned char *)RL_MALLOC(crop.width*crop.height*bytesPerPixel); unsigned char *croppedData = (unsigned char *)RL_MALLOC(crop.width*crop.height*bytesPerPixel);
// OPTION 1: Move cropped data line-by-line
for (int y = (int)crop.y, offsetSize = 0; y < (int)(crop.y + crop.height); y++)
{
memcpy(croppedData + offsetSize, ((unsigned char *)image->data) + (y*image->width + (int)crop.x)*bytesPerPixel, (int)crop.width*bytesPerPixel);
offsetSize += ((int)crop.width*bytesPerPixel);
}
/*
// OPTION 2: Move cropped data pixel-by-pixel or byte-by-byte
for (int y = (int)crop.y; y < (int)(crop.y + crop.height); y++) for (int y = (int)crop.y; y < (int)(crop.y + crop.height); y++)
{ {
for (int x = (int)crop.x; x < (int)(crop.x + crop.width); x++) for (int x = (int)crop.x; x < (int)(crop.x + crop.width); x++)
@ -802,6 +811,7 @@ void ImageCrop(Image *image, Rectangle crop)
for (int i = 0; i < bytesPerPixel; i++) croppedData[((y - (int)crop.y)*(int)crop.width + (x - (int)crop.x))*bytesPerPixel + i] = ((unsigned char *)image->data)[(y*image->width + x)*bytesPerPixel + i]; for (int i = 0; i < bytesPerPixel; i++) croppedData[((y - (int)crop.y)*(int)crop.width + (x - (int)crop.x))*bytesPerPixel + i] = ((unsigned char *)image->data)[(y*image->width + x)*bytesPerPixel + i];
} }
} }
*/
RL_FREE(image->data); RL_FREE(image->data);
image->data = croppedData; image->data = croppedData;