mesa: Add error condition for format=STENCIL_INDEX in glGetTexImage()

From OpenGL 4.0 spec, page 306:
   "Calling GetTexImage with a format of STENCIL_INDEX
    causes the error INVALID_ENUM."

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

diff --git a/src/mesa/main/texgetimage.c b/src/mesa/main/texgetimage.c
index 2beb0abe6d2d7502b96660ddae8591838caded89..754c3658ced7780b5e28da70202d6d2855e96c99 100644 (file)
--- a/src/mesa/main/texgetimage.c
+++ b/src/mesa/main/texgetimage.c
@@ -838,6 +838,11 @@ getteximage_error_check(struct gl_context *ctx, GLenum target, GLint level,
       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
       return GL_TRUE;
    }
+   else if (_mesa_is_stencil_format(format)
+            && !ctx->Extensions.ARB_texture_stencil8) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetTexImage(format=GL_STENCIL_INDEX)");
+      return GL_TRUE;
+   }
    else if (_mesa_is_ycbcr_format(format)
             && !_mesa_is_ycbcr_format(baseFormat)) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");