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windows: gl: Print GetLastError() when makeCurrent fails 

This matches the behavior of other implementations, such as
QEGLPlatformContext: doing a qWarning with the relevant error
from eglGetError() or equivalent is helpful when something
goes wrong and should be common among QOpenGLPlatformContext
implementations.

Pick-to: 6.1
Task-number: QTBUG-85714
Change-Id: Ifa5d22b83808c92ae92efcbcddc8d8c3d3ba34b1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
bb10
Laszlo Agocs 2021-06-08 16:56:34 +02:00
parent ddc886d670
commit 03650696a1
1 changed files with 6 additions and 1 deletions
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7
src/plugins/platforms/windows/qwindowsglcontext.cpp
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@ -1301,7 +1301,10 @@ bool QWindowsGLContext::makeCurrent(QPlatformSurface *surface)
&& QOpenGLStaticContext::opengl32.wglGetCurrentDC() == contextData->hdc) {
return true;
}
return QOpenGLStaticContext::opengl32.wglMakeCurrent(contextData->hdc, contextData->renderingContext);
const bool success = QOpenGLStaticContext::opengl32.wglMakeCurrent(contextData->hdc, contextData->renderingContext);
if (!success)
qErrnoWarning("%s: wglMakeCurrent() failed for existing context data", __FUNCTION__);
return success;
}
// Create a new entry.
const QOpenGLContextData newContext(m_renderingContext, hwnd, GetDC(hwnd));
@ -1329,6 +1332,8 @@ bool QWindowsGLContext::makeCurrent(QPlatformSurface *surface)
qCDebug(lcQpaGl) << "makeCurrent(): context loss detected" << this;
// Drop the surface. Will recreate on the next makeCurrent.
window->invalidateSurface();
} else {
qErrnoWarning("%s: wglMakeCurrent() failed", __FUNCTION__);
}
}