Multi-pass CPU-based filter framework with Super xBR support.(For DS and some GBA games mostly)

[ADormant]

Multi-pass cpu filter framework is required for a cpu based version of Super xBR which can work directly on textures. https://github.com/libretro/common-shaders/tree/master/xbr Here are screenshots of RE Remake on GC with Super xBR applied with RetroArch's image viewer core. Super xBR on textures looks phenomenal on digitized games and games with pre-rendered backgrounds. https://drive.google.com/file/d/0B_yrhrCRtu8GYkxreElSaktxS3M/view?pref=2&pli=1

[ADormant]

@shonumi Super xBR scaler https://forums.dolphin-emu.org/attachment.php?aid=14516 http://pastebin.com/cbH8ZQQT https://drive.google.com/file/d/0B_yrhrCRtu8GYkxreElSaktxS3M/view?pref=2&pli=1