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egl-wayland: Make sure we allocate a back buffer even if nothing was rendered 

At eglSwapBuffer time, we blindly assume we have a back buffer, but the
back buffer only gets allocated when somebody tries to render something.

NOTE: This is a candidate for the 9.0 and 9.1 branches.

https://bugs.freedesktop.org/show_bug.cgi?id=60086
This commit is contained in:
Kristian Høgsberg 2013-02-06 15:41:54 -05:00
parent a4b9678a54
commit 1fe007399c
1 changed files with 8 additions and 0 deletions
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8
src/egl/drivers/dri2/platform_wayland.c
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@ -446,6 +446,7 @@ dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
{
struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
__DRIbuffer buffer;
int i, ret = 0;
while (dri2_surf->frame_callback && ret != -1)
@ -463,6 +464,13 @@ dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
if (dri2_surf->color_buffers[i].age > 0)
dri2_surf->color_buffers[i].age++;
/* Make sure we have a back buffer in case we're swapping without ever
* rendering. */
if (get_back_bo(dri2_surf, &buffer) < 0) {
_eglError(EGL_BAD_ALLOC, "dri2_swap_buffers");
return EGL_FALSE;
}
dri2_surf->back->age = 1;
dri2_surf->current = dri2_surf->back;
dri2_surf->back = NULL;