[Bug 27570] New: r300g incorrectly claims npot support

[Bug 27570] New: r300g incorrectly claims npot support

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=27570

           Summary: r300g incorrectly claims npot support
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/r300
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: wixorpeek@gmail.com


Created an attachment (id=34853)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=34853)
the test program (compile with -std=c99)

The r300g driver on rv515 claims GL_ARB_texture_non_power_of_two support.
Suprisingly, such textures actually work if texture coordinates are (0,0),
(1,0), (1,1), (0,1). However if that's not the case, garbage is rendered. This
bug makes Blender 2.50 ui unusable. 

Attached are: test program, correct rendering (obtained by
LIBGL_ALWAYS_SOFTWARE=1) and r300g's rendering (the garbage pattern varies,
sometimes just white/black, sometimes all pixels are random).

driver is from git version, commit edb5253dfa0...
hardware is radeon x1300 (rv515)
kernel is vanilla 2.6.33.

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[Bug 27570] r300g incorrectly claims npot support

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=27570

--- Comment #1 from Wiktor Janas <wixorpeek@gmail.com> 2010-04-09 13:48:05 PDT ---
Created an attachment (id=34854)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=34854)
the correct rendering

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[Bug 27570] r300g incorrectly claims npot support

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=27570

--- Comment #2 from Wiktor Janas <wixorpeek@gmail.com> 2010-04-09 13:48:27 PDT ---
Created an attachment (id=34855)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=34855)
the r300g's rendering

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[Bug 27570] r300g incorrectly claims npot support

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=27570

--- Comment #3 from Marek Olšák <maraeo@gmail.com> 2010-04-09 14:16:25 PDT ---
The NPOT textures are mandatory in GL2 and if the driver doesn't claim their
support, Mesa will report OpenGL 1.5 only, pretty much killing the main selling
point of r300g.

I plan to implement a fallback soon.

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[Bug 27570] r300g incorrectly claims npot support

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=27570

Marek Olšák <maraeo@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Marek Olšák <maraeo@gmail.com> 2010-05-08 07:50:19 PDT ---
Partial support for NPOT textures has been implemented in fragment shaders and
your attached test program works now. Closing...

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