[Bug 79888] SNA, regression: chromium UI sometimes doesn't redraw

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79888

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |NOTOURBUG

--- Comment #23 from Chris Wilson <chris at chris-wilson.co.uk> ---
The behaviour is as far as I can tell that kwin doesn't update it source after
the menu creates and renders its window. The source is meant to updated after
an invalidation by glXBindTexImageEXT.

The responsible function seems to be kwin/glxbackend.cpp:

void GlxTexture::onDamage()
{
    if (options->isGlStrictBinding() && m_glxpixmap) {
        glXReleaseTexImageEXT(display(), m_glxpixmap, GLX_FRONT_LEFT_EXT);
        glXBindTexImageEXT(display(), m_glxpixmap, GLX_FRONT_LEFT_EXT, NULL);
    }
    GLTexturePrivate::onDamage();
}

so kwinrc:

[Compositing]
GLStrictBinding=true

should fix the issue (but I don't know the full implications of
GLStrictBinding). Indeed it does.

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