Added QPixmapData::createCompatiblePixmapData() used by QPixmap::copy().

QPixmap::copy() now returns a pixmap with the same pixmap backend.

Reviewed-by: Gunnar Sletta

9 files changed, 38 insertions, 8 deletions

diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index 5c8a1f9..c03a364 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -361,13 +361,7 @@ QPixmap QPixmap::copy(const QRect &rect) const
 
     const QRect r = rect.isEmpty() ? QRect(0, 0, width(), height()) : rect;
 
-    QPixmapData *d;
-    QGraphicsSystem* gs = QApplicationPrivate::graphicsSystem();
-    if (gs)
-        d = gs->createPixmapData(data->pixelType());
-    else
-        d = QGraphicsSystem::createDefaultPixmapData(data->pixelType());
-
+    QPixmapData *d = data->createCompatiblePixmapData();
     d->copy(data.data(), r);
     return QPixmap(d);
 }
diff --git a/src/gui/image/qpixmap_mac.cpp b/src/gui/image/qpixmap_mac.cpp
index de532fd..afa6f83 100644
--- a/src/gui/image/qpixmap_mac.cpp
+++ b/src/gui/image/qpixmap_mac.cpp
@@ -166,6 +166,11 @@ QMacPixmapData::QMacPixmapData(PixelType type)
 {
 }
 
+QPixmapData *QMacPixmapData::createCompatiblePixmapData() const
+{
+    return new QMacPixmapData(pixelType());
+}
+
 #define BEST_BYTE_ALIGNMENT 16
 #define COMPTUE_BEST_BYTES_PER_ROW(bpr) \
     (((bpr) + (BEST_BYTE_ALIGNMENT - 1)) & ~(BEST_BYTE_ALIGNMENT - 1))
diff --git a/src/gui/image/qpixmap_mac_p.h b/src/gui/image/qpixmap_mac_p.h
index 528dd1f..a3fb95f 100644
--- a/src/gui/image/qpixmap_mac_p.h
+++ b/src/gui/image/qpixmap_mac_p.h
@@ -65,6 +65,8 @@ public:
     QMacPixmapData(PixelType type);
     ~QMacPixmapData();
 
+    QPixmapData *createCompatiblePixmapData() const;
+
     void resize(int width, int height);
     void fromImage(const QImage &image, Qt::ImageConversionFlags flags);
     void copy(const QPixmapData *data, const QRect &rect);
diff --git a/src/gui/image/qpixmap_raster.cpp b/src/gui/image/qpixmap_raster.cpp
index ad68b07..3667e5b 100644
--- a/src/gui/image/qpixmap_raster.cpp
+++ b/src/gui/image/qpixmap_raster.cpp
@@ -64,6 +64,11 @@ QRasterPixmapData::~QRasterPixmapData()
 {
 }
 
+QPixmapData *QRasterPixmapData::createCompatiblePixmapData() const
+{
+    return new QRasterPixmapData(pixelType());
+}
+
 void QRasterPixmapData::resize(int width, int height)
 {
     QImage::Format format;
diff --git a/src/gui/image/qpixmap_raster_p.h b/src/gui/image/qpixmap_raster_p.h
index da0405e..1553940 100644
--- a/src/gui/image/qpixmap_raster_p.h
+++ b/src/gui/image/qpixmap_raster_p.h
@@ -68,6 +68,8 @@ public:
     QRasterPixmapData(PixelType type);
     ~QRasterPixmapData();
 
+    QPixmapData *createCompatiblePixmapData() const;
+
     void resize(int width, int height);
     void fromFile(const QString &filename, Qt::ImageConversionFlags flags);
     void fromImage(const QImage &image, Qt::ImageConversionFlags flags);
diff --git a/src/gui/image/qpixmap_x11.cpp b/src/gui/image/qpixmap_x11.cpp
index 74543a0..ea9eff9 100644
--- a/src/gui/image/qpixmap_x11.cpp
+++ b/src/gui/image/qpixmap_x11.cpp
@@ -319,6 +319,11 @@ QX11PixmapData::QX11PixmapData(PixelType type)
 {
 }
 
+QPixmapData *QX11PixmapData::createCompatiblePixmapData() const
+{
+    return new QX11PixmapData(pixelType());
+}
+
 void QX11PixmapData::resize(int width, int height)
 {
     setSerialNumber(++qt_pixmap_serial);
diff --git a/src/gui/image/qpixmap_x11_p.h b/src/gui/image/qpixmap_x11_p.h
index e34e690..2d6672d 100644
--- a/src/gui/image/qpixmap_x11_p.h
+++ b/src/gui/image/qpixmap_x11_p.h
@@ -71,6 +71,8 @@ public:
 //                    Qt::ImageConversionFlags flags);
     ~QX11PixmapData();
 
+    QPixmapData *createCompatiblePixmapData() const;
+
     void resize(int width, int height);
     void fromImage(const QImage &image, Qt::ImageConversionFlags flags);
     void copy(const QPixmapData *data, const QRect &rect);
diff --git a/src/gui/image/qpixmapdata.cpp b/src/gui/image/qpixmapdata.cpp
index 93fc2eb..1ad1f02 100644
--- a/src/gui/image/qpixmapdata.cpp
+++ b/src/gui/image/qpixmapdata.cpp
@@ -43,6 +43,8 @@
 #include <QtCore/qbuffer.h>
 #include <QtGui/qbitmap.h>
 #include <QtGui/qimagereader.h>
+#include <private/qgraphicssystem_p.h>
+#include <private/qapplication_p.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -67,6 +69,17 @@ QPixmapData::~QPixmapData()
 {
 }
 
+QPixmapData *QPixmapData::createCompatiblePixmapData() const
+{
+    QPixmapData *d;
+    QGraphicsSystem *gs = QApplicationPrivate::graphicsSystem();
+    if (gs)
+        d = gs->createPixmapData(pixelType());
+    else
+        d = QGraphicsSystem::createDefaultPixmapData(pixelType());
+    return d;
+}
+
 static QImage makeBitmapCompliantIfNeeded(QPixmapData *d, const QImage &image, Qt::ImageConversionFlags flags)
 {
     if (d->pixelType() == QPixmapData::BitmapType) {
diff --git a/src/gui/image/qpixmapdata_p.h b/src/gui/image/qpixmapdata_p.h
index c26fba3..2f4f201 100644
--- a/src/gui/image/qpixmapdata_p.h
+++ b/src/gui/image/qpixmapdata_p.h
@@ -75,9 +75,11 @@ public:
     enum ClassId { RasterClass, X11Class, MacClass, DirectFBClass,
                    OpenGLClass, OpenVGClass, CustomClass = 1024 };
 
-    QPixmapData(PixelType pixelpType, int classId);
+    QPixmapData(PixelType pixelType, int classId);
     virtual ~QPixmapData();
 
+    virtual QPixmapData *createCompatiblePixmapData() const;
+
     virtual void resize(int width, int height) = 0;
     virtual void fromImage(const QImage &image,
                            Qt::ImageConversionFlags flags) = 0;