// Pure 32 bit float precision brute force pixel conversion; for comparison void naiveBulkPixelConversion(const PixelBox &src, const PixelBox &dst) { uint8 *srcptr = static_cast<uint8*>(src.data); uint8 *dstptr = static_cast<uint8*>(dst.data); unsigned int srcPixelSize = PixelUtil::getNumElemBytes(src.format); unsigned int dstPixelSize = PixelUtil::getNumElemBytes(dst.format); // Calculate pitches+skips in bytes int srcRowSkipBytes = src.getRowSkip()*srcPixelSize; int srcSliceSkipBytes = src.getSliceSkip()*srcPixelSize; int dstRowSkipBytes = dst.getRowSkip()*dstPixelSize; int dstSliceSkipBytes = dst.getSliceSkip()*dstPixelSize; // The brute force fallback float r,g,b,a; for(size_t z=src.front; z<src.back; z++) { for(size_t y=src.top; y<src.bottom; y++) { for(size_t x=src.left; x<src.right; x++) { PixelUtil::unpackColour(&r, &g, &b, &a, src.format, srcptr); PixelUtil::packColour(r, g, b, a, dst.format, dstptr); srcptr += srcPixelSize; dstptr += dstPixelSize; } srcptr += srcRowSkipBytes; dstptr += dstRowSkipBytes; } srcptr += srcSliceSkipBytes; dstptr += dstSliceSkipBytes; } }