mesa: Add error condition for integer formats in glGetTexImage()

OpenGL 4.0 spec, page 306 suggests an INVALID_OPERATION in glGetTexImage
if :
   "format is one of the integer formats in table 3.3 and the internal
    format of the texture image is not integer, or format is not one of
    the integer formats in table 3.3 and the internal format is integer."

V2: Use helper function _mesa_is_format_integer()

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mesa/main/texgetimage.c b/src/mesa/main/texgetimage.c
index daabf2e813..2beb0abe6d 100644
--- a/src/mesa/main/texgetimage.c
+++ b/src/mesa/main/texgetimage.c
@@ -853,6 +853,11 @@ 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_enum_format_integer(format) !=
+            _mesa_is_format_integer(texImage->TexFormat)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetTexImage(format mismatch)");
+      return GL_TRUE;
+   }
 
    if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
                                   texImage->Height, texImage->Depth,