Keeping scene-related data in opengl scene.

svn path=/branches/work/kwin_composite/; revision=590319

composite.cpp

@@ -45,12 +45,20 @@ void Workspace::setupCompositing()
         c->setupCompositing();
     foreach( Unmanaged* c, unmanaged )
         c->setupCompositing();
+    foreach( Client* c, clients )
+        scene->windowAdded( c );
+    foreach( Unmanaged* c, unmanaged )
+        scene->windowAdded( c );
     }
 
 void Workspace::finishCompositing()
     {
     if( scene == NULL )
         return;
+    foreach( Client* c, clients )
+        scene->windowDeleted( c );
+    foreach( Unmanaged* c, unmanaged )
+        scene->windowDeleted( c );
     foreach( Client* c, clients )
         c->finishCompositing();
     foreach( Unmanaged* c, unmanaged )

scene.cpp

@@ -34,6 +34,10 @@ void Scene::windowOpacityChanged( Toplevel* )
     {
     }
 
+void Scene::windowAdded( Toplevel* )
+    {
+    }
+
 void Scene::windowDeleted( Toplevel* )
     {
     }

scene.h

@@ -26,6 +26,7 @@ class Scene
         virtual void paint( XserverRegion damage, ToplevelList windows ) = 0;
         virtual void windowGeometryShapeChanged( Toplevel* );
         virtual void windowOpacityChanged( Toplevel* );
+        virtual void windowAdded( Toplevel* );
         virtual void windowDeleted( Toplevel* );
         virtual void transformWindowDamage( Toplevel*, XserverRegion ) const;
         virtual void updateTransformation( Toplevel* );

scene_opengl.cpp

@@ -24,6 +24,8 @@ namespace KWinInternal
 // SceneOpenGL
 //****************************************
 
+GLXFBConfig SceneOpenGL::fbcdrawable;
+
 const int root_attrs[] =
     {
     GLX_DOUBLEBUFFER, False,
@@ -81,6 +83,10 @@ SceneOpenGL::SceneOpenGL( Workspace* ws )
 
 SceneOpenGL::~SceneOpenGL()
     {
+    for( QMap< Toplevel*, Window >::Iterator it = windows.begin();
+         it != windows.end();
+         ++it )
+        (*it).free();
     glXDestroyPixmap( display(), glxroot );
     XFreeGC( display(), gcroot );
     XFreePixmap( display(), buffer );
@@ -99,17 +105,12 @@ static void quadDraw( int x, int y, int w, int h )
     glVertex2i( x, y + h );
     }
 
-GLuint txts[ 100 ];
-int txts_i = 0;
-GLXDrawable drws[ 100 ];
-int drws_i;
-    
 void SceneOpenGL::paint( XserverRegion, ToplevelList windows )
     {
+    grabXServer();
+    glXWaitX();
     glClearColor( 0, 0, 0, 1 );
     glClear( GL_COLOR_BUFFER_BIT /* TODO| GL_DEPTH_BUFFER_BIT*/ );
-    txts_i = 0;
-    drws_i = 0;
     for( ToplevelList::ConstIterator it = windows.begin();
          it != windows.end();
          ++it )
@@ -117,19 +118,16 @@ void SceneOpenGL::paint( XserverRegion, ToplevelList windows )
         QRect r = (*it)->geometry().intersect( QRect( 0, 0, displayWidth(), displayHeight()));
         if( !r.isEmpty())
             {
-            GLXDrawable gldraw = glXCreatePixmap( display(), fbcdrawable,
-                (*it)->windowPixmap(), NULL );
-            glXMakeContextCurrent( display(), gldraw, gldraw, context );
+            assert( this->windows.contains( *it ));
+            Window& w = this->windows[ *it ];
+            GLXDrawable pixmap = w.glxPixmap();
+            glXMakeContextCurrent( display(), pixmap, pixmap, context );
             glReadBuffer( GL_FRONT );
             glDrawBuffer( GL_FRONT );
-            // TODO grabXServer();
-            glXWaitX();
-            GLuint texture;
-            glGenTextures( 1, &texture );
+            Texture texture = w.texture();
             glBindTexture( GL_TEXTURE_RECTANGLE_ARB, texture );
             glCopyTexImage2D( GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA,
                 0, 0, (*it)->width(), (*it)->height(), 0 );
-            //ungrabXServer();
             glXMakeContextCurrent( display(), glxroot, glxroot, context );
             glDrawBuffer( GL_BACK );
             glPushMatrix();
@@ -143,21 +141,57 @@ void SceneOpenGL::paint( XserverRegion, ToplevelList windows )
             glDisable( GL_TEXTURE_RECTANGLE_ARB );
             glBindTexture( GL_TEXTURE_RECTANGLE_ARB, 0 );
             glXWaitGL();
-            txts[ txts_i++ ] = texture;
-            drws[ drws_i++ ] = gldraw;
             }
         }
     glFlush();
     XCopyArea( display(), buffer, rootWindow(), gcroot, 0, 0, displayWidth(), displayHeight(), 0, 0 );
+    ungrabXServer();
     XFlush( display());
-    for( int i = 0;
-         i < txts_i;
-         ++i )
-        glDeleteTextures( 1, &txts[ i ] );
-    for( int i = 0;
-         i < drws_i;
-         ++i )
-        glXDestroyPixmap( display(), drws[ i ] );
+    }
+
+void SceneOpenGL::windowAdded( Toplevel* c )
+    {
+    assert( !windows.contains( c ));
+    windows[ c ] = Window( c );
+    }
+
+void SceneOpenGL::windowDeleted( Toplevel* c )
+    {
+    assert( windows.contains( c ));
+    windows[ c ].free();
+    windows.remove( c );
+    }
+
+SceneOpenGL::Window::Window( Toplevel* c )
+    : toplevel( c )
+    , glxpixmap( None )
+    , gltexture( None )
+    {
+    }
+
+SceneOpenGL::Window::~Window()
+    {
+    }
+    
+void SceneOpenGL::Window::free()
+    {
+    discardPixmap();
+    discardTexture();
+    }
+
+GLXPixmap SceneOpenGL::Window::glxPixmap() const
+    {
+    if( glxpixmap == None )
+        glxpixmap = glXCreatePixmap( display(), fbcdrawable,
+            toplevel->windowPixmap(), NULL );
+    return glxpixmap;
+    }
+
+SceneOpenGL::Texture SceneOpenGL::Window::texture() const
+    {
+    if( gltexture == None )
+        glGenTextures( 1, &gltexture );
+    return gltexture;
     }
 
 } // namespace

scene_opengl.h

@@ -26,15 +26,53 @@ class SceneOpenGL
         SceneOpenGL( Workspace* ws );
         virtual ~SceneOpenGL();
         virtual void paint( XserverRegion damage, ToplevelList windows );
+        virtual void windowAdded( Toplevel* );
+        virtual void windowDeleted( Toplevel* );
     private:
+        typedef GLuint Texture;
         GC gcroot;
         Pixmap buffer;
         GLXFBConfig fbcroot;
-        GLXFBConfig fbcdrawable;
+        static GLXFBConfig fbcdrawable;
         GLXPixmap glxroot;
         GLXContext context;
+        class Window;
+        QMap< Toplevel*, Window > windows;
     };
 
+class SceneOpenGL::Window
+    {
+    public:
+        Window( Toplevel* c );
+        ~Window();
+        void free(); // is often copied by value, use manually instead of dtor
+        GLXPixmap glxPixmap() const;
+        Texture texture() const;
+        Window() {} // QMap sucks even in Qt4
+    private:
+        void discardPixmap();
+        void discardTexture();
+        Toplevel* toplevel;
+        mutable GLXPixmap glxpixmap;
+        mutable Texture gltexture;
+    };
+
+inline
+void SceneOpenGL::Window::discardPixmap()
+    {
+    if( glxpixmap != None )
+        glXDestroyPixmap( display(), glxpixmap );
+    glxpixmap = None;
+    }
+
+inline
+void SceneOpenGL::Window::discardTexture()
+    {
+    if( gltexture != None )
+        glDeleteTextures( 1, &gltexture );
+    gltexture = None;
+    }
+
 } // namespace
 
 #endif

scene_xrender.cpp

@@ -202,12 +202,17 @@ void SceneXrender::windowOpacityChanged( Toplevel* c )
 
 void SceneXrender::windowDeleted( Toplevel* c )
     {
-    if( !window_data.contains( c ))
-        return;
+    assert( window_data.contains( c ));
     window_data[ c ].free();
     window_data.remove( c );
     }
 
+void SceneXrender::windowAdded( Toplevel* c )
+    {
+    assert( !window_data.contains( c ));
+    resetWindowData( c );
+    }
+
 // TODO handle xrandr changes
 
 void SceneXrender::createBuffer()

scene_xrender.h

@@ -33,6 +33,7 @@ class SceneXrender
         virtual void paint( XserverRegion damage, ToplevelList windows );
         virtual void windowGeometryShapeChanged( Toplevel* );
         virtual void windowOpacityChanged( Toplevel* );
+        virtual void windowAdded( Toplevel* );
         virtual void windowDeleted( Toplevel* );
         virtual void transformWindowDamage( Toplevel*, XserverRegion ) const;
         virtual void updateTransformation( Toplevel* );

toplevel.cpp

@@ -10,8 +10,6 @@ License. See the file "COPYING" for the exact licensing terms.
 
 #include "toplevel.h"
 
-#include "scene.h"
-
 namespace KWinInternal
 {
 
@@ -30,8 +28,6 @@ Toplevel::~Toplevel()
     assert( damage_handle == None );
     assert( damage_region == None );
     assert( window_pixmap == None );
-    if( scene != NULL )
-        scene->windowDeleted( this );
     }
 
 #ifndef NDEBUG

workspace.cpp

@@ -43,6 +43,7 @@ License. See the file "COPYING" for the exact licensing terms.
 #include "rules.h"
 #include "kwinadaptor.h"
 #include "unmanaged.h"
+#include "scene.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/keysym.h>
@@ -486,6 +487,8 @@ Client* Workspace::createClient( Window w, bool is_mapped )
         return NULL;
         }
     addClient( c, Allowed );
+    if( scene )
+        scene->windowAdded( c );
     return c;
     }
 
@@ -498,6 +501,8 @@ Unmanaged* Workspace::createUnmanaged( Window w )
         return NULL;
         }
     addUnmanaged( c, Allowed );
+    if( scene )
+        scene->windowAdded( c );
     return c;
     }
 
@@ -564,6 +569,8 @@ void Workspace::removeClient( Client* c, allowed_t )
         Notify::raise( Notify::Delete );
 
     Q_ASSERT( clients.contains( c ) || desktops.contains( c ));
+    if( scene )
+        scene->windowDeleted( c );
     clients.removeAll( c );
     desktops.removeAll( c );
     unconstrained_stacking_order.removeAll( c );
@@ -602,6 +609,8 @@ void Workspace::removeClient( Client* c, allowed_t )
 void Workspace::removeUnmanaged( Unmanaged* c, allowed_t )
     {
     assert( unmanaged.contains( c ));
+    if( scene )
+        scene->windowDeleted( c );
     unmanaged.removeAll( c );
     }