From 177f2a2f17251c22f57944e9dd100ec8515b891a Mon Sep 17 00:00:00 2001
From: Michael Dominic K <mdk@codethink.co.uk>
Date: Tue, 4 Jan 2011 10:53:58 +0100
Subject: QMeeGoGraphicsSystemHelper::setSwapBehavior implementation.
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Merge-request: 993
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
---
 .../qmeegographicssystemhelper.cpp                     | 15 +++++++++++++++
 .../qmeegographicssystemhelper.h                       | 18 ++++++++++++++++++
 .../qmeegographicssystemhelper.pro                     |  2 +-
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp
index b660eb3..37cc417 100644
--- a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp
+++ b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp
@@ -45,6 +45,7 @@
 #include <private/qapplication_p.h>
 #include <private/qgraphicssystem_runtime_p.h>
 #include <private/qpixmap_raster_p.h>
+#include <private/qwindowsurface_gl_p.h>
 #include "qmeegoruntime.h"
 #include "qmeegoswitchevent.h"
 
@@ -153,3 +154,17 @@ void QMeeGoGraphicsSystemHelper::setTranslucent(bool translucent)
     ENSURE_RUNNING_MEEGO;
     QMeeGoRuntime::setTranslucent(translucent);
 }
+
+void QMeeGoGraphicsSystemHelper::setSwapBehavior(SwapMode mode)
+{
+    ENSURE_RUNNING_MEEGO;
+
+    if (mode == AutomaticSwap)
+        QGLWindowSurface::swapBehavior = QGLWindowSurface::AutomaticSwap;
+    else if (mode == AlwaysFullSwap)
+        QGLWindowSurface::swapBehavior = QGLWindowSurface::AlwaysFullSwap;
+    else if (mode == AlwaysPartialSwap)
+        QGLWindowSurface::swapBehavior = QGLWindowSurface::AlwaysPartialSwap;
+    else if (mode == KillSwap)
+        QGLWindowSurface::swapBehavior = QGLWindowSurface::KillSwap;
+}
diff --git a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h
index 6df3c22..c8dccc2 100644
--- a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h
+++ b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h
@@ -186,6 +186,24 @@ public:
      on the top-level widget *before* you show it instead.
     */
     static void setTranslucent(bool translucent);
+
+    //! Used to specify the mode for swapping buffers in double-buffered GL rendering.
+    enum SwapMode {
+        AutomaticSwap,      /**< Automatically choose netween full and partial updates (25% threshold) */
+        AlwaysFullSwap,     /**< Always do a full swap even if partial updates support present */
+        AlwaysPartialSwap,  /**< Always do a partial swap (if support present) no matter what threshold */
+        KillSwap            /**< Do not perform buffer swapping at all (no picture) */
+    };
+
+    //! Sets the buffer swapping mode.
+    /*!
+     This can be only called when running with the meego graphics system.
+     The KillSwap mode can be specififed to effectively block painting.
+
+     This functionality should be used only by applications counting on a specific behavior.
+     Most applications should use the default automatic behavior.
+    */
+    static void setSwapBehavior(SwapMode mode);
 };
 
 #endif
diff --git a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.pro b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.pro
index 360847e..7639ad7 100644
--- a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.pro
+++ b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.pro
@@ -3,7 +3,7 @@ TARGET = QtMeeGoGraphicsSystemHelper
 
 include(../../src/qbase.pri)
 
-QT += gui
+QT += gui opengl
 INCLUDEPATH += '../../src/plugins/graphicssystems/meego'
 
 HEADERS = qmeegographicssystemhelper.h qmeegooverlaywidget.h qmeegolivepixmap.h qmeegoruntime.h qmeegolivepixmap_p.h qmeegofencesync.h qmeegofencesync_p.h qmeegoswitchevent.h
-- 
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