Hi Roman,
This isn't well documented in SurfaceData.h, but there is a set of flags
"SD_LOCK_NEED_PIXELS" which indicates if you need to do the read. This
is used in X11SurfaceData.c, but that file has so many ifdefs and
alternate pixel access modes now that you really have to dig through it
I'm currently implementing a SurfaceData for VxWorks/WindML.
Unfortunately, this graphics library (WindML) doesn't provide me direct
framebuffer access. Therefore I have to perform read and write
operations for rendering operations (at least, for images and likewise
non-primitives). I was thinking
