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Avoid using GLX Pbuffers on Catalyst

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Trigger QOffscreenSurface's fallback mode (hidden QWindow and a regular window
surface) instead. queryDummyContext() already works like this but the same must
be done for any QOffscreenSurface.

Task-number: QTBUG-36900
Change-Id: I64176ac6704e9d6ed768fa3d456c40c8818be6dc
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
This commit is contained in:
Laszlo Agocs 2014-02-18 14:11:34 +01:00 committed by The Qt Project
parent 1e413e01e0
commit 3c50119625
1 changed files with 12 additions and 1 deletions
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13
src/plugins/platforms/xcb/qxcbintegration.cpp
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@ -253,7 +253,18 @@ QPlatformBackingStore *QXcbIntegration::createPlatformBackingStore(QWindow *wind
QPlatformOffscreenSurface *QXcbIntegration::createPlatformOffscreenSurface(QOffscreenSurface *surface) const
{
#if defined(XCB_USE_GLX)
return new QGLXPbuffer(surface);
static bool vendorChecked = false;
static bool glxPbufferUsable = true;
if (!vendorChecked) {
vendorChecked = true;
const char *glxvendor = glXGetClientString(glXGetCurrentDisplay(), GLX_VENDOR);
if (glxvendor && !strcmp(glxvendor, "ATI"))
glxPbufferUsable = false;
}
if (glxPbufferUsable)
return new QGLXPbuffer(surface);
else
return 0; // trigger fallback to hidden QWindow
#elif defined(XCB_USE_EGL)
QXcbScreen *screen = static_cast<QXcbScreen *>(surface->screen()->handle());
return new QEGLPbuffer(screen->connection()->egl_display(), surface->requestedFormat(), surface);