diff options
Diffstat (limited to 'src/openvg/qwindowsurface_vgegl.cpp')
| -rw-r--r-- | src/openvg/qwindowsurface_vgegl.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/openvg/qwindowsurface_vgegl.cpp b/src/openvg/qwindowsurface_vgegl.cpp index 866453ff60..3205a1104b 100644 --- a/src/openvg/qwindowsurface_vgegl.cpp +++ b/src/openvg/qwindowsurface_vgegl.cpp @@ -269,19 +269,20 @@ static QEglContext *createContext(QPaintDevice *device) configProps.setPixelFormat(QImage::Format_ARGB32); // XXX configProps.setValue(EGL_ALPHA_MASK_SIZE, 1); #ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT - configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT | - EGL_VG_ALPHA_FORMAT_PRE_BIT); + configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT + | EGL_SWAP_BEHAVIOR_PRESERVED_BIT + | EGL_VG_ALPHA_FORMAT_PRE_BIT); configProps.setRenderableType(QEgl::OpenVG); if (!context->chooseConfig(configProps)) { // Try again without the "pre" bit. - configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT); + configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT | EGL_SWAP_BEHAVIOR_PRESERVED_BIT); if (!context->chooseConfig(configProps)) { delete context; return 0; } } #else - configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT); + configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT | EGL_SWAP_BEHAVIOR_PRESERVED_BIT); configProps.setRenderableType(QEgl::OpenVG); if (!context->chooseConfig(configProps)) { delete context; |