[paintredirector] Pass KDecoration to PaintRedirector

Gives us more power in the future.

client.cpp

@@ -460,7 +460,7 @@ void Client::createDecoration(const QRect& oldgeom)
     move(calculateGravitation(false));
     plainResize(sizeForClientSize(clientSize()), ForceGeometrySet);
     if (Compositor::compositing()) {
-        paintRedirector = PaintRedirector::create(this, decoration->widget());
+        paintRedirector = PaintRedirector::create(this, decoration);
         discardWindowPixmap();
     }
     emit geometryShapeChanged(this, oldgeom);

paintredirector.cpp

@@ -39,23 +39,24 @@ DEALINGS IN THE SOFTWARE.
 namespace KWin
 {
 
-PaintRedirector *PaintRedirector::create(Client *c, QWidget *widget)
+PaintRedirector *PaintRedirector::create(Client *c, KDecoration *deco)
 {
     if (effects->isOpenGLCompositing()) {
-        return new OpenGLPaintRedirector(c, widget);
+        return new OpenGLPaintRedirector(c, deco);
     } else {
-        return new RasterXRenderPaintRedirector(c, widget);
+        return new RasterXRenderPaintRedirector(c, deco);
     }
 }
 
-PaintRedirector::PaintRedirector(Client *c, QWidget* w)
+PaintRedirector::PaintRedirector(Client *c, KDecoration *deco)
-    : QObject(w)
+    : QObject(deco)
-    , widget(w)
+    , widget(deco->widget())
     , recursionCheck(false)
     , m_client(c)
+    , m_decoration(deco)
     , m_requiresRepaint(false)
 {
-    added(w);
+    added(deco->widget());
 }
 
 PaintRedirector::~PaintRedirector()
@@ -67,6 +68,7 @@ void PaintRedirector::reparent(Deleted *d)
     setParent(d);
     widget = NULL;
     m_client = NULL;
+    m_decoration = NULL;
 }
 
 static int align(int value, int align)
@@ -272,8 +274,8 @@ void PaintRedirector::paint(DecorationPixmap border, const QRect& r, const QRect
 
 
 
-ImageBasedPaintRedirector::ImageBasedPaintRedirector(Client *c, QWidget *widget)
+ImageBasedPaintRedirector::ImageBasedPaintRedirector(Client *c, KDecoration *deco)
-    : PaintRedirector(c, widget)
+    : PaintRedirector(c, deco)
 {
 }
 
@@ -307,8 +309,8 @@ void ImageBasedPaintRedirector::discardScratch()
 // ------------------------------------------------------------------
 
 
-OpenGLPaintRedirector::OpenGLPaintRedirector(Client *c, QWidget *widget)
+OpenGLPaintRedirector::OpenGLPaintRedirector(Client *c, KDecoration *deco)
-    : ImageBasedPaintRedirector(c, widget)
+    : ImageBasedPaintRedirector(c, deco)
 {
     for (int i = 0; i < TextureCount; ++i)
         m_textures[i] = NULL;
@@ -386,8 +388,8 @@ void OpenGLPaintRedirector::updatePixmaps(const QRect *rects, const QRegion &reg
 
 
 
-RasterXRenderPaintRedirector::RasterXRenderPaintRedirector(Client *c, QWidget *widget)
+RasterXRenderPaintRedirector::RasterXRenderPaintRedirector(Client *c, KDecoration *deco)
-    : ImageBasedPaintRedirector(c, widget)
+    : ImageBasedPaintRedirector(c, deco)
     , m_gc(0)
 {
     for (int i=0; i<PixmapCount; ++i) {

paintredirector.h

@@ -33,6 +33,8 @@ DEALINGS IN THE SOFTWARE.
 // xcb
 #include <xcb/render.h>
 
+class KDecoration;
+
 namespace KWin
 {
 
@@ -84,12 +86,12 @@ public:
      * is created.
      **/
     void reparent(Deleted *d);
-    static PaintRedirector *create(Client *c, QWidget* widget);
+    static PaintRedirector *create(Client *c, KDecoration *deco);
 
 public Q_SLOTS:
     void ensurePixmapsPainted();
 protected:
-    PaintRedirector(Client *c, QWidget* widget);
+    PaintRedirector(Client *c, KDecoration *deco);
     virtual xcb_render_picture_t picture(DecorationPixmap border) const;
     virtual GLTexture *texture(DecorationPixmap border) const;
     virtual void resizePixmaps(const QRect *rects);
@@ -117,6 +119,7 @@ private:
     QBasicTimer cleanupTimer;
 
     Client *m_client;
+    KDecoration *m_decoration;
     bool m_requiresRepaint;
 };
 
@@ -126,7 +129,7 @@ class ImageBasedPaintRedirector : public PaintRedirector
 public:
     virtual ~ImageBasedPaintRedirector();
 protected:
-    ImageBasedPaintRedirector(Client *c, QWidget *widget);
+    ImageBasedPaintRedirector(Client *c, KDecoration *deco);
     virtual QPaintDevice *recreateScratch(const QSize &size);
     virtual QPaintDevice *scratch();
     virtual void fillScratch(Qt::GlobalColor color);
@@ -143,7 +146,7 @@ class OpenGLPaintRedirector : public ImageBasedPaintRedirector
     enum Texture { LeftRight = 0, TopBottom, TextureCount };
 
 public:
-    OpenGLPaintRedirector(Client *c, QWidget *widget);
+    OpenGLPaintRedirector(Client *c, KDecoration *deco);
     virtual ~OpenGLPaintRedirector();
 
     GLTexture *leftRightTexture() const { return m_textures[LeftRight]; }
@@ -161,7 +164,7 @@ class RasterXRenderPaintRedirector : public ImageBasedPaintRedirector
 {
     Q_OBJECT
 public:
-    RasterXRenderPaintRedirector(Client *c, QWidget *widget);
+    RasterXRenderPaintRedirector(Client *c, KDecoration *deco);
     virtual ~RasterXRenderPaintRedirector();
 
 protected: