From 4a1ae3d1b4e8e032b1c978fcc7e1812e37e1f047 Mon Sep 17 00:00:00 2001 From: Laszlo Agocs Date: Wed, 27 Apr 2011 15:18:58 +0200 Subject: Make translucent windows working properly with OpenVG. The OpenVG engine correctly uses vgClear() to fill the surface with transparent pixels whenever the window has the WA_TranslucentBackground attribute enabled. However both scissoring and masking affects the operation of vgClear(). Drawing artifacts were previously visible due this, simply because scissoring was left enabled by the VG paint engine, and the filling with transparent pixels happens in the window surface's beginPaint() that is called between the paint engine's end() (for the previous paint) and begin() (for the next paint). Task-number: QT-4907 Reviewed-by: Jani Hautakangas --- src/openvg/qpaintengine_vg.cpp | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/openvg/qpaintengine_vg.cpp b/src/openvg/qpaintengine_vg.cpp index ebdfa5f..648415c 100644 --- a/src/openvg/qpaintengine_vg.cpp +++ b/src/openvg/qpaintengine_vg.cpp @@ -1533,6 +1533,8 @@ bool QVGPaintEngine::begin(QPaintDevice *pdev) bool QVGPaintEngine::end() { + vgSeti(VG_SCISSORING, VG_FALSE); + vgSeti(VG_MASKING, VG_FALSE); return true; } @@ -3759,6 +3761,8 @@ void QVGPaintEngine::beginNativePainting() #if !defined(QVG_NO_DRAW_GLYPHS) d->setTransform(VG_MATRIX_GLYPH_USER_TO_SURFACE, d->pathTransform); #endif + vgSeti(VG_SCISSORING, VG_FALSE); + vgSeti(VG_MASKING, VG_FALSE); d->rawVG = true; } @@ -3819,6 +3823,7 @@ void QVGPaintEngine::restoreState(QPaintEngine::DirtyFlags dirty) if ((dirty & QPaintEngine::DirtyBrushOrigin) != 0) brushOriginChanged(); d->fillRule = 0; + d->clearColor = QColor(); if ((dirty & QPaintEngine::DirtyOpacity) != 0) opacityChanged(); if ((dirty & QPaintEngine::DirtyTransform) != 0) -- cgit v0.12