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glamor: fixes GL_INVALID_ENUM errors on ES if there is no quads

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If there is no quads to draw, then we have a possibility to call
glDrawElements with type as zero, which will generate
GL_INVALID_ENUM error. While this error is harmless, it is annoying.

Signed-off-by: Konstantin <ria.freelander@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
(cherry picked from commit baaddf47d5)

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1636>
This commit is contained in:
Konstantin 2022-12-02 16:22:15 +03:00
parent feb860014d
commit 3078e49257
1 changed files with 4 additions and 0 deletions
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4
glamor/glamor.c
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@ -310,6 +310,10 @@ glamor_gldrawarrays_quads_using_indices(glamor_screen_private *glamor_priv,
{
unsigned i;
/* If there is no quads to draw, just exit */
if (count == 0)
return;
/* For a single quad, don't bother with an index buffer. */
if (count == 1)
goto fallback;