Upload VGImage data when drawing pixmaps that are being painted into.

When a painter is open on a pixmap's underlying QVolatileImage, it is
better to upload the VGImage content every time the pixmap is drawn
on the screen, in order to enable showing animations that are created
by continously rendering into the same pixmap and keeping the same
painter open.

Task-number: QT-4002
Reviewed-by: Jason Barron

2 files changed, 6 insertions, 0 deletions

diff --git a/src/gui/image/qvolatileimage.cpp b/src/gui/image/qvolatileimage.cpp
index 098e9a1..f5076e1 100644
--- a/src/gui/image/qvolatileimage.cpp
+++ b/src/gui/image/qvolatileimage.cpp
@@ -103,6 +103,11 @@ QVolatileImage &QVolatileImage::operator=(const QVolatileImage &rhs)
     return *this;
 }
 
+bool QVolatileImage::paintingActive() const
+{
+    return d->pengine && d->pengine->isActive();
+}
+
 bool QVolatileImage::isNull() const
 {
     return d->image.isNull();
diff --git a/src/gui/image/qvolatileimage_p.h b/src/gui/image/qvolatileimage_p.h
index fc5d6b1..d835f45 100644
--- a/src/gui/image/qvolatileimage_p.h
+++ b/src/gui/image/qvolatileimage_p.h
@@ -71,6 +71,7 @@ public:
     ~QVolatileImage();
     QVolatileImage &operator=(const QVolatileImage &rhs);
 
+    bool paintingActive() const;
     bool isNull() const;
     QImage::Format format() const;
     int width() const;