Added native image handle provider support in pixmaps on openvg.

QNativeImageHandleProvider is a thin interface consisting of get()
and release() functions. Pixmaps constructed with such a provider
will call these functions to acquire and release a native handle,
e.g. a CFbsBitmap or RSgImage pointer in case of Symbian. The behavior
is largely similar to constructing pixmaps via fromSymbianCFbsBitmap
or fromSymbianRSgImage, with the exception of pixmap hibernation:
release() (and subsequently get()) is guaranteed to be called also
in case of hibernation, allowing more fine-grained tracking of
the usage and lifetime of image data.

Task-number: QT-4632
Reviewed-by: Jani Hautakangas

1 files changed, 11 insertions, 0 deletions

diff --git a/src/openvg/qpixmapdata_vg_p.h b/src/openvg/qpixmapdata_vg_p.h
index 80ff1cb..15ff889 100644
--- a/src/openvg/qpixmapdata_vg_p.h
+++ b/src/openvg/qpixmapdata_vg_p.h
@@ -76,6 +76,8 @@ void qt_vg_unregister_pixmap(QVGPixmapData *pd);
 void qt_vg_hibernate_pixmaps(QVGSharedContext *context);
 #endif
 
+class QNativeImageHandleProvider;
+
 class Q_OPENVG_EXPORT QVGPixmapData : public QPixmapData
 {
 public:
@@ -138,6 +140,9 @@ public:
 #if defined(Q_OS_SYMBIAN)
     void* toNativeType(NativeType type);
     void fromNativeType(void* pixmap, NativeType type);
+    bool initFromNativeImageHandle(void *handle, const QString &type);
+    void createFromNativeImageHandleProvider();
+    void releaseNativeImageHandle();
 #endif
 
 protected:
@@ -177,6 +182,12 @@ protected:
     mutable QEglContext *context;
 #endif
 
+#if defined(Q_OS_SYMBIAN)
+    mutable QNativeImageHandleProvider *nativeImageHandleProvider;
+    void *nativeImageHandle;
+    QString nativeImageType;
+#endif
+
     void forceToImage();
     QImage::Format sourceFormat() const;
     QImage::Format idealFormat(QImage *image, Qt::ImageConversionFlags flags) const;