copy_mem_image() copies image copy_mem_image() copies image data without alpha channel (4th byte). If you need alpha channel in your bitmap, you need to use per-pixel copy in a loop. -- Alex Tutubalin @LibRaw LLC reply
copy_mem_image() copies image data without alpha channel (4th byte).
If you need alpha channel in your bitmap, you need to use per-pixel copy in a loop.