[Mesa-dev] [PATCH 19/34] mesa/shaderapi: Allow 0 GEOMETRY_VERTICES_OUT.

[Paul Berry]

From: Fabian Bieler <fabianbieler at fastmail.fm>

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 at gmail.com>
---
 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 9f8cd70..0eb90aa 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -1625,7 +1625,7 @@ _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)",
-- 
1.8.3.4