[Bug 102354] Mesa 17.2 no longer can give SRGB-capable framebuffer on i965, even though Mesa 17.1.x does.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102354

--- Comment #7 from Deve <deveee at gmail.com> ---
I just checked the patch and nothing changed for me (with GLX, I didn't test
EGL). I patched mesa version 4d807d7fe272db97fb9e20800872d5970fa2696d.

If you run current git STK, there are two warnings in console:

[warn   ] irr_driver: Created visual is not sRGB-capable. Re-creating device to
workaround the issue.
[warn   ] [IrrDriver Temp Logger]: Level 2: No sRGB framebuffer available.

The first one happens for intel when
glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_BACK_LEFT,
                              GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING,
&param);

returns GL_LINEAR, so this is true for all mesa versions >= 10.6 (precisely
since MESA_FORMAT_R8G8B8X8_UNORM has been added). In this case we make an ugly
hack and re-create device with alpha channel, that forces to use
MESA_FORMAT_R8G8B8A8_SRGB.

The second warning happens when request a config with
GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB fails. So then we try to get a config without
this flag.

And glxinfo still doesn't show any srgb configs for me. Are there some
particular requirements, such as current libdrm, DRI2/DRI3 etc...?

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