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REDESIGNED: ImageFlipVertical(), optimized #1218

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raysan5 2020-06-07 11:51:26 +02:00
parent 5d0b2c796e
commit 93d6dd3023
1 changed files with 14 additions and 16 deletions
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30
src/textures.c
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@ -1579,26 +1579,24 @@ void ImageFlipVertical(Image *image)
// Security check to avoid program crash // Security check to avoid program crash
if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return; if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return;
Color *srcPixels = GetImageData(*image); if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level");
Color *dstPixels = (Color *)RL_MALLOC(image->width*image->height*sizeof(Color)); if (image->format >= COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats");
else
for (int y = 0; y < image->height; y++)
{ {
for (int x = 0; x < image->width; x++) int dataSize = GetPixelDataSize(image->width, image->height, image->format);
int bytesPerPixel = dataSize/(image->width*image->height);
unsigned char *flippedData = (unsigned char *)RL_MALLOC(dataSize);
for (int i = (image->height - 1), offsetSize = 0; i >= 0; i--)
{ {
dstPixels[y*image->width + x] = srcPixels[(image->height - 1 - y)*image->width + x]; memcpy(flippedData + offsetSize, ((unsigned char *)image->data) + i*image->width*bytesPerPixel, image->width*bytesPerPixel);
offsetSize += image->width*bytesPerPixel;
} }
RL_FREE(image->data);
image->data = flippedData;
} }
int format = image->format;
RL_FREE(image->data);
image->data = dstPixels;
image->format = UNCOMPRESSED_R8G8B8A8;
ImageFormat(image, format);
RL_FREE(srcPixels);
} }
// Flip image horizontally // Flip image horizontally