Don't use EGL surfaces for translucency with 32MB GPU chip.

Add dynamic GPU chip detection on Symbian to decide if
translucent EGL surfaces can be used. With 32MB GPU memory
there is not enough memory to create for example transparent
video overlay widgets and that's why hw surfaces must not
be used.

Task-number: QTBUG-18024
Reviewed-by: Jason Barron

5 files changed, 56 insertions, 12 deletions

diff --git a/src/gui/kernel/qapplication_p.h b/src/gui/kernel/qapplication_p.h
index 43634ef..3d2c9d6 100644
--- a/src/gui/kernel/qapplication_p.h
+++ b/src/gui/kernel/qapplication_p.h
@@ -599,6 +599,8 @@ public:
     int pressureSupported;
     int maxTouchPressure;
     QList<QTouchEvent::TouchPoint> appAllTouchPoints;
+
+    bool useTranslucentEGLSurfaces;
 #endif
 
 private:
diff --git a/src/gui/kernel/qapplication_s60.cpp b/src/gui/kernel/qapplication_s60.cpp
index 6e43c8b..43b9b01 100644
--- a/src/gui/kernel/qapplication_s60.cpp
+++ b/src/gui/kernel/qapplication_s60.cpp
@@ -100,7 +100,6 @@ static const int KGoomMemoryGoodEvent = 0x20026790;
 static const int KSplitViewOpenEvent = 0x2001E2C0;
 static const int KSplitViewCloseEvent = 0x2001E2C1;
 
-
 #if defined(QT_DEBUG)
 static bool        appNoGrab        = false;        // Grabbing enabled
 #endif
@@ -1665,6 +1664,32 @@ void qt_init(QApplicationPrivate * /* priv */, int)
     QObject::connect(qApp, SIGNAL(aboutToQuit()), qApp, SLOT(_q_aboutToQuit()));
 #endif
 
+#ifdef Q_SYMBIAN_SEMITRANSPARENT_BG_SURFACE
+    QApplicationPrivate::instance()->useTranslucentEGLSurfaces = true;
+
+    const TUid KIvePropertyCat = {0x2726beef};
+    enum TIvePropertyChipType {
+        EVCBCM2727B1 = 0x00000000,
+        EVCBCM2763A0 = 0x04000100,
+        EVCBCM2763B0 = 0x04000102,
+        EVCBCM2763C0 = 0x04000103,
+        EVCBCM2763C1 = 0x04000104,
+        EVCBCMUnknown = 0x7fffffff
+    };
+
+    TInt chipType = EVCBCMUnknown;
+    if (RProperty::Get(KIvePropertyCat, 0 /*chip type*/, chipType) == KErrNone) {
+        if (chipType == EVCBCM2727B1) {
+            // We have only 32MB GPU memory. Use raster surfaces
+            // for transparent TLWs.
+            QApplicationPrivate::instance()->useTranslucentEGLSurfaces = false;
+        }
+    } else {
+        QApplicationPrivate::instance()->useTranslucentEGLSurfaces = false;
+    }
+#else
+    QApplicationPrivate::instance()->useTranslucentEGLSurfaces = false;
+#endif
 /*
  ### Commented out for now as parameter handling not needed in SOS(yet). Code below will break testlib with -o flag
     int argc = priv->argc;
diff --git a/src/gui/kernel/qwidget_s60.cpp b/src/gui/kernel/qwidget_s60.cpp
index be212fb..62d09fe 100644
--- a/src/gui/kernel/qwidget_s60.cpp
+++ b/src/gui/kernel/qwidget_s60.cpp
@@ -813,17 +813,21 @@ void QWidgetPrivate::s60UpdateIsOpaque()
     RWindow *const window = static_cast<RWindow *>(q->effectiveWinId()->DrawableWindow());
 
 #ifdef Q_SYMBIAN_SEMITRANSPARENT_BG_SURFACE
-    window->SetSurfaceTransparency(!isOpaque);
-    extra->topextra->nativeWindowTransparencyEnabled = !isOpaque;
-#else
+    if (QApplicationPrivate::instance()->useTranslucentEGLSurfaces) {
+        window->SetSurfaceTransparency(!isOpaque);
+        extra->topextra->nativeWindowTransparencyEnabled = !isOpaque;
+        return;
+    }
+#endif
     if (!isOpaque) {
         const TDisplayMode displayMode = static_cast<TDisplayMode>(window->SetRequiredDisplayMode(EColor16MA));
         if (window->SetTransparencyAlphaChannel() == KErrNone) {
             window->SetBackgroundColor(TRgb(255, 255, 255, 0));
             extra->topextra->nativeWindowTransparencyEnabled = 1;
 
-            if (extra->topextra->backingStore.data() &&
-                    QApplicationPrivate::graphics_system_name == QLatin1String("openvg")) {
+            if (extra->topextra->backingStore.data() && (
+                    QApplicationPrivate::graphics_system_name == QLatin1String("openvg")
+                    || QApplicationPrivate::graphics_system_name == QLatin1String("opengl"))) {
                 // Semi-transparent EGL surfaces aren't supported. We need to
                 // recreate backing store to get translucent surface (raster surface).
                 extra->topextra->backingStore.create(q);
@@ -834,7 +838,6 @@ void QWidgetPrivate::s60UpdateIsOpaque()
         window->SetTransparentRegion(TRegionFix<1>());
         extra->topextra->nativeWindowTransparencyEnabled = 0;
     }
-#endif
 }
 
 void QWidgetPrivate::setWindowIcon_sys(bool forceReset)
diff --git a/src/opengl/qgraphicssystem_gl.cpp b/src/opengl/qgraphicssystem_gl.cpp
index 79911fb..3574756 100644
--- a/src/opengl/qgraphicssystem_gl.cpp
+++ b/src/opengl/qgraphicssystem_gl.cpp
@@ -53,6 +53,10 @@
 #include "private/qwindowsurface_x11gl_p.h"
 #endif
 
+#if defined(Q_OS_SYMBIAN)
+#include <QtGui/private/qapplication_p.h>
+#endif
+
 QT_BEGIN_NAMESPACE
 
 extern QGLWidget *qt_gl_getShareWidget();
@@ -86,6 +90,14 @@ QWindowSurface *QGLGraphicsSystem::createWindowSurface(QWidget *widget) const
     }
 #endif
 
+#if defined(Q_OS_SYMBIAN)
+    if (!QApplicationPrivate::instance()->useTranslucentEGLSurfaces) {
+        QWidgetPrivate *d = qt_widget_private(widget);
+        if (!d->isOpaque && widget->testAttribute(Qt::WA_TranslucentBackground))
+            return d->createDefaultWindowSurface_sys();
+    }
+#endif
+
     return new QGLWindowSurface(widget);
 }
 
diff --git a/src/plugins/graphicssystems/openvg/qgraphicssystem_vg.cpp b/src/plugins/graphicssystems/openvg/qgraphicssystem_vg.cpp
index 1da58e1..4b4f677 100644
--- a/src/plugins/graphicssystems/openvg/qgraphicssystem_vg.cpp
+++ b/src/plugins/graphicssystems/openvg/qgraphicssystem_vg.cpp
@@ -43,7 +43,7 @@
 #include <QtOpenVG/private/qpixmapdata_vg_p.h>
 #include <QtOpenVG/private/qwindowsurface_vg_p.h>
 #include <QtOpenVG/private/qvgimagepool_p.h>
-#if defined(Q_OS_SYMBIAN) && !defined(Q_SYMBIAN_SEMITRANSPARENT_BG_SURFACE)
+#if defined(Q_OS_SYMBIAN)
 #include <QtGui/private/qwidget_p.h>
 #endif
 #include <QtGui/private/qapplication_p.h>
@@ -70,10 +70,12 @@ QPixmapData *QVGGraphicsSystem::createPixmapData(QPixmapData::PixelType type) co
 
 QWindowSurface *QVGGraphicsSystem::createWindowSurface(QWidget *widget) const
 {
-#if defined(Q_OS_SYMBIAN) && !defined(Q_SYMBIAN_SEMITRANSPARENT_BG_SURFACE)
-    QWidgetPrivate *d = qt_widget_private(widget);
-    if (!d->isOpaque && widget->testAttribute(Qt::WA_TranslucentBackground))
-        return d->createDefaultWindowSurface_sys();
+#if defined(Q_OS_SYMBIAN)
+    if (!QApplicationPrivate::instance()->useTranslucentEGLSurfaces) {
+        QWidgetPrivate *d = qt_widget_private(widget);
+        if (!d->isOpaque && widget->testAttribute(Qt::WA_TranslucentBackground))
+            return d->createDefaultWindowSurface_sys();
+    }
 #endif
     return new QVGWindowSurface(widget);
 }