> I have seen some mmx filters, and even some hardware, that requires the > lines to be DWORD or QWORD aligned. No problem with the common image sizes, lines will be aligned even without any padding: NTSC: 640 = 2^7 * 5 PAL: 768 = 2^8 * 3 The common DCT-based compression algorithms want image width be a multiple of 8 or 16 because the DCT blocks are 8x8 (luma needs to be 16 then because of chroma subsampling). That will give you qword aligned lines without padding too. > Granted, this is rare, ... and would be a problem only if you want to use image sizes like 389 * 251. Is this really a problem? Gerd -- Get back there in front of the computer NOW. Christmas can wait. -- Linus "the Grinch" Torvalds, 24 Dec 2000 on linux-kernel
