Citēju hd <[email protected]>: > > Glynn Clements a écrit : > > hd wrote: > > > > > >> I my app, I receive a raw image in 16 bits depth. > >> My defaut visual have a depth of 24 bits (and all other Visual have 24 > >> or 32bits depth on my X server). > >> > >> To display the bitmap I try to create an XImage with XCreateImage() and > >> display it with XPutImage(). > >> But X displays a "bad match" error > >> > >> If I try to display a "raw image" with the same depth (24bits) as the > >> visual (24bits), my app works. > >> > >> Question : XImage APIs (XCreateImage() / XPutImage() / ...) can convert > >> 'on the fly' the depth of the bitmap to match the visual depth > >> or must I convert myself the raw bitmap to match the visual depth ? > >> (convert each pixel from 16bits to 24 bits) > >> > > > > You must convert yourself, or use a higher-level interface. The core X > > protocol doesn't do format conversions. > > > > If you want the conversion to be done in hardware, look at OpenGL or > > XRender. It's implementation-dependent whether either of these > > supports a specific format (other than 24-bit RGB), so you still need > > to provide a software conversion. > >
It is done in the xloadimage source: ftp://ftp.x.org/R5contrib/xloadimage.4.1.tar.gz Aivils > thanks a lot for your help. > regards _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
