diff options
| -rw-r--r-- | src/openvg/qwindowsurface_vgegl.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/src/openvg/qwindowsurface_vgegl.cpp b/src/openvg/qwindowsurface_vgegl.cpp index e3f52f4e..37e5f40 100644 --- a/src/openvg/qwindowsurface_vgegl.cpp +++ b/src/openvg/qwindowsurface_vgegl.cpp @@ -709,10 +709,9 @@ QEglContext *QVGEGLWindowSurfaceDirect::ensureContext(QWidget *widget) #if !defined(QVG_NO_PRESERVED_SWAP) // Try to force the surface back buffer to preserve its contents. if (needToSwap) { - eglGetError(); // Clear error state first. - eglSurfaceAttrib(QEgl::display(), windowSurface, + bool succeeded = eglSurfaceAttrib(QEgl::display(), windowSurface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED); - if (eglGetError() != EGL_SUCCESS) { + if (!succeeded && eglGetError() != EGL_SUCCESS) { qWarning("QVG: could not enable preserved swap"); } } |