From 39ca58192b093607a5c7bb59d2f8cb13fbc63c63 Mon Sep 17 00:00:00 2001
From: Fabian Bieler <fabianbieler@fastmail.fm>
Date: Thu, 30 May 2013 00:17:42 +0200
Subject: [PATCH] mesa/shaderapi: Allow 0 GEOMETRY_VERTICES_OUT.

ARB_geometry_shader4 spec Errors:
"The error INVALID_VALUE is generated by ProgramParameteriARB if <pname>
is GEOMETRY_VERTICES_OUT_ARB and <value> is negative."

Reviewed-by: Paul Berry <stereotype441@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---
 src/mesa/main/shaderapi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 858cec57f7c..f3ae4f5d8fa 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -1634,7 +1634,7 @@ _mesa_ProgramParameteri(GLuint program, GLenum pname, GLint value)
       if (!_mesa_is_desktop_gl(ctx) || !ctx->Extensions.ARB_geometry_shader4)
          break;
 
-      if (value < 1 ||
+      if (value < 0 ||
           (unsigned) value > ctx->Const.MaxGeometryOutputVertices) {
          _mesa_error(ctx, GL_INVALID_VALUE,
                      "glProgramParameteri(GL_GEOMETRY_VERTICES_OUT_ARB=%d)",
-- 
2.11.0