From 81fde3a976dec66b0c3eeb006033c0369752e386 Mon Sep 17 00:00:00 2001 From: Louai Al-Khanji Date: Mon, 28 Apr 2014 08:32:17 +0300 Subject: Direct2D QPA: Speed up widget painting By only starting/ending drawing once in the backing store, we can avoid multiple start/ends and thus flushes of the direct2d device context. This can potentially be much faster with some drivers when many widgets that draw to the same backing store need to redraw. Because starts/ends of QWindowsDirect2DDeviceContext are already refcounted this works out of the box. Change-Id: Ib48edceef6a1041ae0509587c77ac0caa8b29fc6 Reviewed-by: Risto Avila Reviewed-by: Friedemann Kleint --- .../platforms/direct2d/qwindowsdirect2dbackingstore.cpp | 10 ++++++++++ src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.h | 3 +++ 2 files changed, 13 insertions(+) (limited to 'src') diff --git a/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp b/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp index 079ad6f127..e4ce81bd24 100644 --- a/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp +++ b/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.cpp @@ -75,6 +75,16 @@ QWindowsDirect2DBackingStore::~QWindowsDirect2DBackingStore() { } +void QWindowsDirect2DBackingStore::beginPaint(const QRegion &) +{ + platformPixmap(m_pixmap.data())->bitmap()->deviceContext()->begin(); +} + +void QWindowsDirect2DBackingStore::endPaint() +{ + platformPixmap(m_pixmap.data())->bitmap()->deviceContext()->end(); +} + QPaintDevice *QWindowsDirect2DBackingStore::paintDevice() { return m_pixmap.data(); diff --git a/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.h b/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.h index 9776d234e8..fc6802aaa2 100644 --- a/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.h +++ b/src/plugins/platforms/direct2d/qwindowsdirect2dbackingstore.h @@ -58,6 +58,9 @@ public: QWindowsDirect2DBackingStore(QWindow *window); ~QWindowsDirect2DBackingStore(); + void beginPaint(const QRegion &); + void endPaint(); + QPaintDevice *paintDevice() Q_DECL_OVERRIDE; void flush(QWindow *window, const QRegion ®ion, const QPoint &offset) Q_DECL_OVERRIDE; void resize(const QSize &size, const QRegion &staticContents) Q_DECL_OVERRIDE; -- cgit v1.2.3