Hi, > > Supporting 16 bpp in the driver wouldn't be that much of a problem, but > > processing the framebuffer on the host side when emulating a big endian > > guest on a little endian host is painful. I think I can't ask pixman to > > do a conversation from DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN to > > DRM_FORMAT_XRGB8888 on a little endian machine. > > Indeed. But you can do a quick 16-bit byteswap, and convert from > DRM_FORMAT_RGB565 to DRM_FORMAT_XRGB8888?
Sure doable, but it's an extra step in a rarely tested code path ... > BTW, does pixman support converting DRM_FORMAT_RGB565 to > DRM_FORMAT_XRGB8888 on a big-endian machine? I don't think so. When you can get the color bits with shifting and masking pixman is happy. For rgb565 (and xrgb1555) that works only on native byte order. take care, Gerd
