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Clear the scissor before calling glBlitFramebuffer in swap_region

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glBlitFramebuffer is affected by the scissor so we need to ensure
there is an empty clip flushed before using it. This is similar to
what is done in _cogl_blit_framebuffer().

https://bugzilla.gnome.org/show_bug.cgi?id=690451

Reviewed-by: Robert Bragg <robert@linux.intel.com>
Tested-by: Aaron Plattner <aplattner@nvidia.com>

(cherry picked from commit 65da3f88af9c7b8d72758d116c2652aff68195c1)
This commit is contained in:
Neil Roberts 2012-12-19 13:58:55 +00:00
parent 015a47b77a
commit f1baa4d60f
1 changed files with 9 additions and 0 deletions
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9
cogl/winsys/cogl-winsys-glx.c
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@ -1285,6 +1285,15 @@ _cogl_winsys_onscreen_swap_region (CoglOnscreen *onscreen,
int i;
/* XXX: checkout how this state interacts with the code to use
* glBlitFramebuffer in Neil's texture atlasing branch */
/* glBlitFramebuffer is affected by the scissor so we need to
* ensure we have flushed an empty clip stack to get rid of it.
* We also mark that the clip state is dirty so that it will be
* flushed to the correct state the next time something is
* drawn */
_cogl_clip_stack_flush (NULL, framebuffer);
context->current_draw_buffer_changes |= COGL_FRAMEBUFFER_STATE_CLIP;
context->glDrawBuffer (GL_FRONT);
for (i = 0; i < n_rectangles; i++)
{