OpenGL: Add parameters to choose FBO grab orientation

We want to be able to pass as an argument whether the texture grabbed to
an FBO is supposed to have a flipped y-axis or not. This is required for
screen capture on the EGLFS platform.

Task-number: QTBUG-121835
Pick-to: 6.7 6.6 6.5
Change-Id: I6dddc879a4be7ff2c2c189747193423644be55a0
Reviewed-by: Laszlo Agocs <[email protected]>
Reviewed-by: Artem Dyomin <[email protected]>

1 files changed, 10 insertions, 3 deletions

diff --git a/src/opengl/qopenglcompositor_p.h b/src/opengl/qopenglcompositor_p.h
index f2059f90fad..86229b13ca3 100644
--- a/src/opengl/qopenglcompositor_p.h
+++ b/src/opengl/qopenglcompositor_p.h
@@ -47,6 +47,11 @@ class Q_OPENGL_EXPORT QOpenGLCompositor : public QObject
     Q_OBJECT
 
 public:
+    enum GrabOrientation {
+        Flipped,
+        NotFlipped,
+    };
+
     static QOpenGLCompositor *instance();
     static void destroy();
 
@@ -60,7 +65,7 @@ public:
     void update();
     QImage grab();
 
-    bool grabToFrameBufferObject(QOpenGLFramebufferObject *fbo);
+    bool grabToFrameBufferObject(QOpenGLFramebufferObject *fbo, GrabOrientation orientation = Flipped);
 
     QList<QOpenGLCompositorWindow *> windows() const { return m_windows; }
     void addWindow(QOpenGLCompositorWindow *window);
@@ -78,8 +83,10 @@ private:
     QOpenGLCompositor();
     ~QOpenGLCompositor();
 
-    void renderAll(QOpenGLFramebufferObject *fbo);
-    void render(QOpenGLCompositorWindow *window);
+    void renderAll(QOpenGLFramebufferObject *fbo,
+                   QOpenGLTextureBlitter::Origin origin = QOpenGLTextureBlitter::OriginTopLeft);
+    void render(QOpenGLCompositorWindow *window,
+                QOpenGLTextureBlitter::Origin origin = QOpenGLTextureBlitter::OriginTopLeft);
     void ensureCorrectZOrder();
 
     QOpenGLContext *m_context;