QNX: Remove most of the CPU overhead for video rendering

This patch uses the GL_OES_EGL_image extension to create a OpenGL Texture handle
for a libscreen pixmap. If the extension is not available it uses the "old"
technique as fallback where the image data is copied into a QImage.

This reduces the CPU load by more than 70% and allows HD videos to be played jitter-free.

Task-number: QTBUG-37752

Change-Id: I4cad22c39390e4cf9eb5be5f0bfe446544a11b9e
Reviewed-by: Bernd Weimer <bweimer@blackberry.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/qtmultimediaquicktools/qdeclarativevideooutput_render.cpp b/src/qtmultimediaquicktools/qdeclarativevideooutput_render.cpp
index cd03cd6b8..647732485 100644
--- a/src/qtmultimediaquicktools/qdeclarativevideooutput_render.cpp
+++ b/src/qtmultimediaquicktools/qdeclarativevideooutput_render.cpp
@@ -201,6 +201,16 @@ QSGNode *QDeclarativeVideoRendererBackend::updatePaintNode(QSGNode *oldNode,
             obj->event(&ev);
         }
     }
+#if defined (Q_OS_QNX) // On QNX we need to be called back again for creating the egl images
+    else {
+        // Internal mechanism to call back the surface renderer from the QtQuick render thread
+        QObject *obj = m_surface->property("_q_GLThreadCallback").value<QObject*>();
+        if (obj) {
+            QEvent ev(static_cast<QEvent::Type>(QEvent::User + 1));
+            obj->event(&ev);
+        }
+    }
+#endif
 
     if (m_frameChanged) {
         if (videoNode && videoNode->pixelFormat() != m_frame.pixelFormat()) {