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meta: Don't call _mesa_Ortho with width or height of 0

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Fixes failures in oglconform fbo mipmap.manual.color,
mipmap.manual.colorAndDepth, mipmap.automatic, and
mipmap.manualIterateTexTargets subtests.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Chad Versace <chad.versace@linux.intel.com>
Cc: "9.2" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Ian Romanick 2013-08-08 12:33:04 -07:00
parent 17bb96b03d
commit 341fb93c16
1 changed files with 8 additions and 3 deletions
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11
src/mesa/drivers/common/meta.c
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@ -704,9 +704,14 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
_mesa_LoadIdentity();
_mesa_MatrixMode(GL_PROJECTION);
_mesa_LoadIdentity();
_mesa_Ortho(0.0, ctx->DrawBuffer->Width,
0.0, ctx->DrawBuffer->Height,
-1.0, 1.0);
/* glOrtho with width = 0 or height = 0 generates GL_INVALID_VALUE.
* This can occur when there is no draw buffer.
*/
if (ctx->DrawBuffer->Width != 0 && ctx->DrawBuffer->Height != 0)
_mesa_Ortho(0.0, ctx->DrawBuffer->Width,
0.0, ctx->DrawBuffer->Height,
-1.0, 1.0);
}
if (state & MESA_META_CLIP) {