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framebuffer: Bail out if the viewport has negative size

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This commit is contained in:
Emmanuele Bassi 2011-05-25 16:49:09 +01:00
parent eb81ec945c
commit 19e1dcff23
1 changed files with 4 additions and 0 deletions
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4
cogl/cogl-framebuffer.c
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@ -1413,6 +1413,10 @@ _cogl_framebuffer_flush_state (CoglFramebuffer *draw_buffer,
{
float gl_viewport_y;
if (draw_buffer->viewport_width < 0
|| draw_buffer->viewport_height < 0)
return;
/* Convert the Cogl viewport y offset to an OpenGL viewport y offset
* NB: OpenGL defines its window and viewport origins to be bottom
* left, while Cogl defines them to be top left.