eglfs: Add support for systems without pbuffer support

Use a small native window and window surface in case the hooks indicate
that pbuffer support is not available.

Change-Id: I6515309041f0e1e2f5321d59941f35d6ee16dca7
Reviewed-by: Louai Al-Khanji <louai.al-khanji@digia.com>
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/platformsupport/eglconvenience/qeglplatformcontext_p.h b/src/platformsupport/eglconvenience/qeglplatformcontext_p.h
index 7825c7b3d7..b922584554 100644
--- a/src/platformsupport/eglconvenience/qeglplatformcontext_p.h
+++ b/src/platformsupport/eglconvenience/qeglplatformcontext_p.h
@@ -59,6 +59,7 @@ public:
                         EGLConfig *config = 0, const QVariant &nativeHandle = QVariant());
     ~QEGLPlatformContext();
 
+    void initialize();
     bool makeCurrent(QPlatformSurface *surface);
     void doneCurrent();
     void swapBuffers(QPlatformSurface *surface);
@@ -74,6 +75,8 @@ public:
 
 protected:
     virtual EGLSurface eglSurfaceForPlatformSurface(QPlatformSurface *surface) = 0;
+    virtual EGLSurface createTemporaryOffscreenSurface();
+    virtual void destroyTemporaryOffscreenSurface(EGLSurface surface);
 
 private:
     void init(const QSurfaceFormat &format, QPlatformOpenGLContext *share);