Related Bug ID: 63117

Function at /Mesa-10.0.3/src/gallium/state_trackers/osmesa/osmesa.c

Is defined as:

osmesa_find_buffer(enum pipe_format color_format,
                   enum pipe_format ds_format,
                   enum pipe_format accum_format)

but should take care, also, of buffer size, other case mesa segfaults when size changes between calls.

As a workaround I implemented it as (but probably is not the best approach):

static struct osmesa_buffer *
osmesa_find_buffer(enum pipe_format color_format,
                   enum pipe_format ds_format,
                   enum pipe_format accum_format,
                   GLsizei width, GLsizei height
                  )
{
   struct osmesa_buffer *b;

   /* Check if we already have a suitable buffer for the given formats */
   for (b = BufferList; b; b = b->next) {
      if (b->visual.color_format == color_format &&
          b->visual.depth_stencil_format == ds_format &&
          b->visual.accum_format == accum_format &&
          b->width == width &&
          b->height == height) {
         return b;
      }
   }
   return NULL;
}