51ee2e86d1
The PaintRedirector calls the new method KDecoration::render and passes it's PaintDevice and the region to update to it. A decoration can implement this method and provide an optimized implementation for the painting which does not go through the deco's QWidget at all. In addition the decoration can invoke an update() slot which will schedule a repaint in the PaintRedirector and thus completely replaces the need for intercepting paint events on the QWidget and also allows to add QWindow based decorations in future.
249 lines
6.7 KiB
C++
249 lines
6.7 KiB
C++
/*****************************************************************
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This file is part of the KDE project.
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Copyright (C) 2009 Lubos Lunak <l.lunak@kde.org>
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Copyright (C) 2012 Martin Gräßlin <mgraesslin@kde.org>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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******************************************************************/
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#ifndef PAINTREDIRECTOR_H
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#define PAINTREDIRECTOR_H
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#include <qregion.h>
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#include <qtimer.h>
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#include <qwidget.h>
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#include <qbasictimer.h>
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// xcb
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#include <xcb/render.h>
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class KDecoration;
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namespace KWin
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{
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// forward declarations
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class Client;
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class Deleted;
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class XRenderPicture;
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class GLTexture;
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// This class redirects all painting of a given widget (including its children)
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// into a paint device (QPixmap).
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class PaintRedirector
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: public QObject
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{
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Q_OBJECT
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public:
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enum DecorationPixmap {
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TopPixmap,
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RightPixmap,
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BottomPixmap,
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LeftPixmap,
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PixmapCount
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};
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virtual ~PaintRedirector();
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virtual bool eventFilter(QObject* o, QEvent* e);
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QRegion pendingRegion() const;
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QRegion scheduledRepaintRegion();
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void markAsRepainted() {
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m_requiresRepaint = false;
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}
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bool requiresRepaint() const {
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return m_requiresRepaint;
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}
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void resizePixmaps();
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template <typename T>
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T topDecoPixmap() const;
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template <typename T>
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T leftDecoPixmap() const;
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template <typename T>
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T bottomDecoPixmap() const;
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template <typename T>
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T rightDecoPixmap() const;
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/**
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* Used by Deleted::copyToDeleted() to move the PaintRedirector to the Deleted.
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* The actual redirecting ends as the decoration gets destroyed after the Deleted
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* is created.
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**/
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void reparent(Deleted *d);
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static PaintRedirector *create(Client *c, KDecoration *deco);
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void addRepaint(const QRegion ®ion);
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public Q_SLOTS:
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void ensurePixmapsPainted();
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protected:
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PaintRedirector(Client *c, KDecoration *deco);
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virtual xcb_render_picture_t picture(DecorationPixmap border) const;
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virtual GLTexture *texture(DecorationPixmap border) const;
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virtual void resizePixmaps(const QRect *rects);
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virtual void resize(DecorationPixmap border, const QSize &size);
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virtual void preparePaint(const QPixmap &pending);
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virtual void updatePixmaps(const QRect *rects, const QRegion ®ion);
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virtual void paint(DecorationPixmap border, const QRect& r, const QRect &b, const QRegion ®);
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virtual QPaintDevice *scratch() = 0;
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virtual QPaintDevice *recreateScratch(const QSize &size) = 0;
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virtual void fillScratch(Qt::GlobalColor color) = 0;
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virtual void discardScratch() = 0;
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private:
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void added(QWidget* widget);
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void removed(QWidget* widget);
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bool isToolTip(QWidget* widget) const;
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void timerEvent(QTimerEvent* event);
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void performPendingPaint();
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void repaintPixmap(DecorationPixmap border, const QRect& r, QRegion reg);
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QWidget* widget;
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QRegion pending;
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QRegion scheduled;
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bool recursionCheck;
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QBasicTimer cleanupTimer;
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Client *m_client;
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KDecoration *m_decoration;
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bool m_requiresRepaint;
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};
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class ImageBasedPaintRedirector : public PaintRedirector
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{
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Q_OBJECT
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public:
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virtual ~ImageBasedPaintRedirector();
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protected:
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ImageBasedPaintRedirector(Client *c, KDecoration *deco);
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virtual QPaintDevice *recreateScratch(const QSize &size);
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virtual QPaintDevice *scratch();
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virtual void fillScratch(Qt::GlobalColor color);
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virtual void discardScratch();
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const QImage &scratchImage() const;
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private:
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QImage m_scratchImage;
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};
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class OpenGLPaintRedirector : public ImageBasedPaintRedirector
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{
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Q_OBJECT
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enum Texture { LeftRight = 0, TopBottom, TextureCount };
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public:
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OpenGLPaintRedirector(Client *c, KDecoration *deco);
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virtual ~OpenGLPaintRedirector();
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GLTexture *leftRightTexture() const { return m_textures[LeftRight]; }
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GLTexture *topBottomTexture() const { return m_textures[TopBottom]; }
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protected:
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virtual void resizePixmaps(const QRect *rects);
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virtual void updatePixmaps(const QRect *rects, const QRegion ®ion);
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private:
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GLTexture *m_textures[2];
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};
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class RasterXRenderPaintRedirector : public ImageBasedPaintRedirector
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{
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Q_OBJECT
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public:
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RasterXRenderPaintRedirector(Client *c, KDecoration *deco);
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virtual ~RasterXRenderPaintRedirector();
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protected:
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virtual xcb_render_picture_t picture(DecorationPixmap border) const;
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virtual void resize(DecorationPixmap border, const QSize &size);
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virtual void paint(DecorationPixmap border, const QRect &r, const QRect &b, const QRegion ®);
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virtual void preparePaint(const QPixmap &pending);
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private:
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QSize m_sizes[PixmapCount];
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xcb_pixmap_t m_pixmaps[PixmapCount];
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xcb_gcontext_t m_gc;
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XRenderPicture* m_pictures[PixmapCount];
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QImage m_tempImage;
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};
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template <>
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inline
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GLTexture *PaintRedirector::bottomDecoPixmap() const
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{
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return texture(BottomPixmap);
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}
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template <>
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inline
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GLTexture *PaintRedirector::leftDecoPixmap() const
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{
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return texture(LeftPixmap);
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}
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template <>
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inline
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GLTexture *PaintRedirector::rightDecoPixmap() const
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{
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return texture(RightPixmap);
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}
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template <>
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inline
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GLTexture *PaintRedirector::topDecoPixmap() const
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{
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return texture(TopPixmap);
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}
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template <>
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inline
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xcb_render_picture_t PaintRedirector::bottomDecoPixmap() const
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{
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return picture(BottomPixmap);
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}
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template <>
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inline
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xcb_render_picture_t PaintRedirector::leftDecoPixmap() const
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{
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return picture(LeftPixmap);
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}
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template <>
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inline
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xcb_render_picture_t PaintRedirector::rightDecoPixmap() const
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{
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return picture(RightPixmap);
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}
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template <>
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inline
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xcb_render_picture_t PaintRedirector::topDecoPixmap() const
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{
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return picture(TopPixmap);
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}
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inline
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const QImage &ImageBasedPaintRedirector::scratchImage() const
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{
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return m_scratchImage;
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}
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} // namespace
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#endif
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