I'm currently creating a surfaceless OpenGL context using the EGL_KHR_surfaceless_context extension together with eglGetPlatformDisplay/EGL_PLATFORM_GBM_MESA. So my default framebuffer has no real buffers. I normally only render to textures bound to FBOs. Due to an error on my side I called glDrawBuffer with GL_FRONT_LEFT while no FBO was bound. This result in a crash in intel_buffers.c because in intelDrawBuffer() dri2InvalidateDrawable is called with a null pointer which is not checked in dri2InvalidateDrawable() or anywhere before. While the root cause for triggering the error is on my side, I think it may be better to raise an error instead of crashing. So I propose to add a check to brw->driContext->driDrawablePriv within intelDrawBuffer. Probably if the driDrawablePriv is nullptr one should not call intel_prepare_render either.
Regards Volker _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
