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iOS: Keep size and device pixel ratio of QIOSBackingStore in sync with window 

We were only doing this for the size, which caused problems when moving
a window from one screen to another where the two screens had different
device pixel ratios.

Change-Id: If56df34677417369639ee8e4df05820fddd9198d
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@theqtcompany.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
bb10
Tor Arne Vestbø 2015-01-21 16:07:08 +01:00 committed by Tor Arne Vestbø
parent 5abba00bef
commit f568e511b7
2 changed files with 10 additions and 10 deletions
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4
src/plugins/platforms/ios/qiosbackingstore.h
View File

@ -38,6 +38,8 @@
QT_BEGIN_NAMESPACE
class QOpenGLPaintDevice;
class QIOSBackingStore : public QPlatformBackingStore
{
public:
@ -53,7 +55,7 @@ public:
private:
QOpenGLContext *m_context;
QPaintDevice *m_device;
QOpenGLPaintDevice *m_device;
};
QT_END_NAMESPACE

16
src/plugins/platforms/ios/qiosbackingstore.mm
View File

@ -73,19 +73,17 @@ QIOSBackingStore::~QIOSBackingStore()
void QIOSBackingStore::beginPaint(const QRegion &)
{
m_context->makeCurrent(window());
QIOSWindow *iosWindow = static_cast<QIOSWindow *>(window()->handle());
static_cast<QOpenGLPaintDevice *>(paintDevice())->setSize(window()->size() * iosWindow->devicePixelRatio());
}
QPaintDevice *QIOSBackingStore::paintDevice()
{
if (!m_device) {
QIOSWindow *iosWindow = static_cast<QIOSWindow *>(window()->handle());
QOpenGLPaintDevice *openGLDevice = new QOpenGLPaintDevice(window()->size() * iosWindow->devicePixelRatio());
openGLDevice->setDevicePixelRatio(iosWindow->devicePixelRatio());
m_device = openGLDevice;
}
if (!m_device)
m_device = new QOpenGLPaintDevice;
// Keep paint device size and device pixel ratio in sync with window
qreal devicePixelRatio = window()->devicePixelRatio();
m_device->setSize(window()->size() * devicePixelRatio);
m_device->setDevicePixelRatio(devicePixelRatio);
return m_device;
}