Mesa (master): mesa: raise GL_INVALID_OPERATION in glGenerateMipmap for missing base image

[Brian Paul]

Module: Mesa
Branch: master
Commit: f6b7157550205a0633b4c2cb49a807d581176e21
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f6b7157550205a0633b4c2cb49a807d581176e21

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Aug 10 10:36:17 2012 -0600

mesa: raise GL_INVALID_OPERATION in glGenerateMipmap for missing base image

This seems to be expected by the WebGL texture-mips test.  The error makes
sense, but I haven't found (yet) any OpenGL documentation specifying this
error condition.

See http://bugs.freedesktop.org/show_bug.cgi?id=44912

Note: This is a candidate for the 8.0 branch.

Reviewed-by: José Fonseca <jfonseca at vmware.com>

---

 src/mesa/main/fbobject.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index aa8ba18..792a92d 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2564,6 +2564,8 @@ _mesa_GenerateMipmapEXT(GLenum target)
    srcImage = _mesa_select_tex_image(ctx, texObj, target, texObj->BaseLevel);
    if (!srcImage) {
       _mesa_unlock_texture(ctx, texObj);
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glGenerateMipmap(zero size base image)");
       return;
    }