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[rtextures] Only generate mipmaps that don't already exist

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Not-Nik 2024-10-24 19:13:58 +02:00
parent d79c1ecf10
commit 2ddb21dc3a
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1 changed files with 14 additions and 9 deletions
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23
src/rtextures.c
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@ -2395,22 +2395,16 @@ void ImageMipmaps(Image *image)
else TRACELOG(LOG_WARNING, "IMAGE: Mipmaps required memory could not be allocated");
// Pointer to allocated memory point where store next mipmap level data
unsigned char *nextmip = (unsigned char *)image->data + GetPixelDataSize(image->width, image->height, image->format);
unsigned char *nextmip = image->data;
mipWidth = image->width/2;
mipHeight = image->height/2;
mipWidth = image->width;
mipHeight = image->height;
mipSize = GetPixelDataSize(mipWidth, mipHeight, image->format);
Image imCopy = ImageCopy(*image);
for (int i = 1; i < mipCount; i++)
{
TRACELOGD("IMAGE: Generating mipmap level: %i (%i x %i) - size: %i - offset: 0x%x", i, mipWidth, mipHeight, mipSize, nextmip);
ImageResize(&imCopy, mipWidth, mipHeight); // Uses internally Mitchell cubic downscale filter
memcpy(nextmip, imCopy.data, mipSize);
nextmip += mipSize;
image->mipmaps++;
mipWidth /= 2;
mipHeight /= 2;
@ -2420,9 +2414,20 @@ void ImageMipmaps(Image *image)
if (mipHeight < 1) mipHeight = 1;
mipSize = GetPixelDataSize(mipWidth, mipHeight, image->format);
if (i < image->mipmaps)
continue;
TRACELOGD("IMAGE: Generating mipmap level: %i (%i x %i) - size: %i - offset: 0x%x", i, mipWidth, mipHeight, mipSize, nextmip);
ImageResize(&imCopy, mipWidth, mipHeight); // Uses internally Mitchell cubic downscale filter
memcpy(nextmip, imCopy.data, mipSize);
}
UnloadImage(imCopy);
image->mipmaps = mipCount;
}
else TRACELOG(LOG_WARNING, "IMAGE: Mipmaps already available");
}