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REDESIGNED: ImageRotateCW(), optimized #1218

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raysan5 2020-06-07 11:52:55 +02:00
parent d278eae4a3
commit 79e2fbe0c6
1 changed files with 22 additions and 20 deletions
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24
src/textures.c
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@ -1652,30 +1652,32 @@ void ImageRotateCW(Image *image)
// Security check to avoid program crash
if ((image->data == NULL) || (image->width == 0) || (image->height == 0)) return;
Color *srcPixels = GetImageData(*image);
Color *rotPixels = (Color *)RL_MALLOC(image->width*image->height*sizeof(Color));
if (image->mipmaps > 1) TRACELOG(LOG_WARNING, "Image manipulation only applied to base mipmap level");
if (image->format >= COMPRESSED_DXT1_RGB) TRACELOG(LOG_WARNING, "Image manipulation not supported for compressed formats");
else
{
int dataSize = GetPixelDataSize(image->width, image->height, image->format);
int bytesPerPixel = dataSize/(image->width*image->height);
unsigned char *rotatedData = (unsigned char *)RL_MALLOC(dataSize);
for (int y = 0; y < image->height; y++)
{
for (int x = 0; x < image->width; x++)
{
rotPixels[x*image->height + (image->height - y - 1)] = srcPixels[y*image->width + x];
//memcpy(rotatedData + (x*image->height + (image->height - y - 1))*bytesPerPixel, ((unsigned char *)image->data) + (y*image->width + x)*bytesPerPixel, bytesPerPixel);
for (int i = 0; i < bytesPerPixel; i++) rotatedData[(x*image->height + (image->height - y - 1))*bytesPerPixel + i] = ((unsigned char *)image->data)[(y*image->width + x)*bytesPerPixel + i];
}
}
int format = image->format;
RL_FREE(image->data);
image->data = rotatedData;
int width = image->width;
int height = image-> height;
RL_FREE(image->data);
image->data = rotPixels;
image->width = height;
image->height = width;
image->format = UNCOMPRESSED_R8G8B8A8;
ImageFormat(image, format);
RL_FREE(srcPixels);
}
}
// Rotate image counter-clockwise 90deg