[Bug 76399] [IVB/HSW] ogl-samples: gl-320-texture-integer assertion fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76399

Kenneth Graunke <kenneth at whitecape.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |anuj.phogat at gmail.com,
                   |                            |kenneth at whitecape.org
            Summary|[IVB/HSW] ogl-samples:      |[IVB/HSW] ogl-samples:
                   |gl-320-texture-integer core |gl-320-texture-integer
                   |dumped                      |assertion fails

--- Comment #2 from Kenneth Graunke <kenneth at whitecape.org> ---
The program calls glGenerateMipmaps on a RGBA8UI texture, which Anuj disallowed
in:

commit c0a78d7d7b51e125d143e693fdfc78b90f2d68cf
Author: Anuj Phogat <anuj.phogat at gmail.com>
Date:   Fri Nov 2 10:47:33 2012 -0700

    mesa: Generate invalid operation in glGenerateMipMap for integer textures

    Khronos has reached a conclusion and disallowed following texture formats
in
    glGenerateMipMap():
     (a) ASTC textures
     (b) integer internal formats (e.g., RGBA8UI, RG16I)
     (c) textures with stencil formats (e.g., STENCIL_INDEX8)
     (d) textures with packed depth/stencil formats (e.g, DEPTH24_STENCIL8)

    https://cvs.khronos.org/bugzilla/show_bug.cgi?id=9471

    Note: This is a candidate for stable branches.
    Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
    Reviewed-by: Brian Paul <brianp at vmware.com>

After that, the program asserts that there is no error...and dies.

Reading the Khronos bug, it sounds like the final resolution was to do what
Anuj implemented.  However, I see zero text to that effect in the OpenGL 4.3 or
even 4.4 specs.  It sounds like they instead adopted a "it ought to work"
resolution.

Reverting Anuj's commit fixes this demo.  Ian, do you think we should clarify
with Khronos, or how would you like to proceed?

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