Bug 76399 - ogl-samples: gl-320-texture-integer assertion fails
Summary: ogl-samples: gl-320-texture-integer assertion fails
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i965 (show other bugs)
Version: unspecified
Hardware: All Linux (All)
: medium normal
Assignee: Intel 3D Bugs Mailing List
QA Contact: Intel 3D Bugs Mailing List
URL: https://cvs.khronos.org/bugzilla/show...
Depends on:
Reported: 2014-03-20 12:07 UTC by meng
Modified: 2019-09-25 18:50 UTC (History)
5 users (show)

See Also:
i915 platform:
i915 features:


Description meng 2014-03-20 12:07:54 UTC
System Environment:
Mesa:   (master)eaf9affa5ec9c5fd919e4207ab80b4677650ac67
Xserver:(master)xorg-server- Xf86_video_intel:	
Kernel:	(drm-intel-nightly) git-ec45c7

Bug detailed description:
It’s not a regression, firstly test ogl-samples.

 - build: https://github.com/g-truc/ogl-samples

Test-case: gl-320-texture-integer

Expected outcome:

Actual outcome:
It’s core dump.
   -"OpenGL Error(GL_INVALID_OPERATION): initTexture"
   -ogl-samples/framework/test.cpp:412: bool test::checkError(const char*) const: Assertion `0' failed.
Comment 1 meng 2014-03-20 12:11:30 UTC
Another test case: Gl-330-texture-rect too.
Comment 2 Kenneth Graunke 2014-03-23 07:51:04 UTC
The program calls glGenerateMipmaps on a RGBA8UI texture, which Anuj disallowed in:

commit c0a78d7d7b51e125d143e693fdfc78b90f2d68cf
Author: Anuj Phogat <anuj.phogat@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
     (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)
    Note: This is a candidate for stable branches.
    Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
    Reviewed-by: Brian Paul <brianp@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?
Comment 3 Kenneth Graunke 2014-03-23 08:09:13 UTC
(In reply to comment #1)
> Another test case: Gl-330-texture-rect too.

That's an unrelated failure.  I've split that issue out into a new bug, #76496.

This bug remains about gl-320-texture-integer.
Comment 4 Matt Turner 2016-11-03 18:47:51 UTC
Still fails.

Mesa: User error: GL_INVALID_OPERATION in glGenerateMipmap(invalid internal format GL_RGBA8UI)

I've made a comment in the Khronos bug about this. Looks like it was forgotten.
Comment 5 GitLab Migration User 2019-09-25 18:50:30 UTC
-- GitLab Migration Automatic Message --

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