1 files changed, 182 insertions, 0 deletions
diff --git a/kcontrol/background/bgrender.h b/kcontrol/background/bgrender.h
new file mode 100644
index 000000000..39e00ff5d
--- /dev/null
+++ b/kcontrol/background/bgrender.h
@@ -0,0 +1,182 @@
+/* vi: ts=8 sts=4 sw=4
+ * kate: space-indent on; tab-width 8; indent-width 4; indent-mode cstyle;
+ *
+ * This file is part of the KDE project, module kdesktop.
+ * Copyright (C) 1999 Geert Jansen <g.t.jansen@stud.tue.nl>
+ *
+ * You can Freely distribute this program under the GNU Library General
+ * Public License. See the file "COPYING.LIB" for the exact licensing terms.
+ */
+
+#ifndef BGRender_h_Included
+#define BGRender_h_Included
+
+#include <qobject.h>
+#include <qptrvector.h>
+#include <qimage.h>
+#include <qpixmap.h>
+
+#include "bgsettings.h"
+
+class QSize;
+class QRect;
+class QString;
+class QTimer;
+
+class KConfig;
+class KProcess;
+class KTempFile;
+class KShellProcess;
+class KStandardDirs;
+
+/**
+ * This class renders a desktop background to a QImage. The operation is
+ * asynchronous: connect to the signal imageDone() to find out when the
+ * rendering is finished. It also has support for preview images, like
+ * the monitor in kcmdisplay.
+ */
+class KBackgroundRenderer:
+	public QObject,
+	public KBackgroundSettings
+{
+    Q_OBJECT
+
+public:
+    KBackgroundRenderer(int desk, int screen, bool drawBackgroundPerScreen, KConfig *config=0);
+    ~KBackgroundRenderer();
+    
+    void load(int desk, int screen, bool drawBackgroundPerScreen, bool reparseConfig=true);
+
+    void setPreview(const QSize &size);
+    void setSize(const QSize &size);
+    
+    QPixmap pixmap();
+    QImage image();
+    bool isActive() { return m_State & Rendering; }
+    void cleanup();
+    void saveCacheFile();
+    void enableTiling( bool enable ) { m_TilingEnabled = enable; }
+
+public slots:
+    void start(bool enableBusyCursor = false);
+    void stop();
+    void desktopResized();
+
+signals:
+    void imageDone(int desk, int screen);
+    void programFailure(int desk, int exitstatus); //Guaranteed either programFailure or 
+    void programSuccess(int desk);                //programSuccess is emitted after imageDone
+
+private slots:
+    void slotBackgroundDone(KProcess *);
+    void render();
+    void done();
+
+private:
+    enum { Error, Wait, WaitUpdate, Done };
+    enum { Rendering = 1, InitCheck = 2,
+	BackgroundStarted = 4, BackgroundDone = 8,
+	WallpaperStarted = 0x10, WallpaperDone = 0x20,
+	AllDone = 0x40 };
+
+    QString buildCommand();
+    void createTempFile();
+    void tile(QImage& dst, QRect rect, const QImage& src);
+    void blend(QImage& dst, QRect dr, const QImage& src, QPoint soffs = QPoint(0, 0), int blendFactor=100);
+
+    void wallpaperBlend();
+    void fastWallpaperBlend();
+    void fullWallpaperBlend();
+
+    int doBackground(bool quit=false);
+    int doWallpaper(bool quit=false);
+    void setBusyCursor(bool isBusy);
+    QString cacheFileName();
+    bool useCacheFile() const;
+    bool canTile() const;
+    
+    bool m_isBusyCursor;
+    bool m_enableBusyCursor;
+    bool m_bPreview;
+    int m_State;
+    bool m_Cached;
+    bool m_TilingEnabled;
+
+    KTempFile* m_Tempfile;
+    QSize m_Size, m_rSize;
+    QRect m_WallpaperRect;
+    QImage m_Image, m_Background, m_Wallpaper;
+    QPixmap m_Pixmap;
+    QTimer *m_pTimer;
+
+    KStandardDirs *m_pDirs;
+    KShellProcess *m_pProc;
+    
+};
+
+/**
+ * In xinerama mode, each screen is rendered seperately by KBackgroundRenderer.
+ * This class controls a set of renderers for a desktop, and coallates the
+ * images. Usage is similar to KBackgroundRenderer: connect to the imageDone
+ * signal.
+ */
+class KVirtualBGRenderer : public QObject
+{
+    Q_OBJECT
+public:
+    KVirtualBGRenderer(int desk, KConfig *config=0l);
+    ~KVirtualBGRenderer();
+    
+    KBackgroundRenderer * renderer(unsigned screen);
+    unsigned numRenderers() const { return m_numRenderers; }
+
+    QPixmap pixmap();
+    
+    void setPreview(const QSize & size);
+    
+    bool needProgramUpdate();
+    void programUpdate();
+    
+    bool needWallpaperChange();
+    void changeWallpaper();
+    
+    int hash();
+    bool isActive();
+    void setEnabled( bool enable );
+    void desktopResized();
+    
+    void load(int desk, bool reparseConfig=true);
+    void start();
+    void stop();
+    void cleanup();
+    void saveCacheFile();
+    void enableTiling( bool enable );
+
+signals:
+    void imageDone(int desk);
+
+private slots:
+    void screenDone(int desk, int screen);
+
+private:
+    QSize renderSize(int screen); // the size the renderer should be
+    void initRenderers();
+    
+    KConfig *m_pConfig;
+    float m_scaleX;
+    float m_scaleY;
+    int m_desk;
+    unsigned m_numRenderers;
+    bool m_bDrawBackgroundPerScreen;
+    bool m_bCommonScreen;
+    bool m_bDeleteConfig;
+    QSize m_size;
+    
+    QMemArray<bool> m_bFinished;
+    QPtrVector<KBackgroundRenderer> m_renderer;
+    QPixmap *m_pPixmap;
+};
+
+
+#endif // BGRender_h_Included
+