[Bug 24800] New: wine try to use float texture even if driver don't support them

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=24800

           Summary: wine try to use float texture even if driver don't
                    support them
           Product: Wine
           Version: 1.2.1
          Platform: x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: fabio.ped at libero.it


Created an attachment (id=31363)
 --> (http://bugs.winehq.org/attachment.cgi?id=31363)
wine output with mesa git master r300 gallium driver

The game Panzers II shows lot of wine warnings and mesa errors like:
Mesa: User error: GL_INVALID_VALUE in glTexImage2D(internalFormat=0x822e)
err:d3d:check_fbo_compat >>>>>>>>>>>>>>>>> GL_INVALID_VALUE (0x501) from
Framebuffer format check @ utils.c / 968
fixme:d3d:check_fbo_compat Format WINED3DFMT_R32_FLOAT with rendertarget flag
is not supported as FBO color attachment, and no fallback specified.

Full output is attached.

According to a mesa developer the problem is that current mesa git master
implements ARB_texture_rg and wine thinks it also support R16G16_FLOAT
textures:
https://bugs.freedesktop.org/show_bug.cgi?id=30823

Indeed when disabling such mesa extension with the env variable:
MESA_EXTENSION_OVERRIDE=-GL_ARB_texture_rg

the warnings no longer appear (output also attached).

Other than the warning I see no obvious visual differences. I am using wine
1.2.1 found on Ubuntu 10.10 with a Radeon X1600 (RV530) card using the gallium
r300 driver.

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