A silly effect that just shows a picture. Using

picture of Konqi is recommended :).


svn path=/branches/work/kwin_composite/; revision=654703

effects/CMakeLists.txt

@@ -31,6 +31,7 @@ SET(kwin4_effect_builtins_sources
 
 SET(kwin4_effect_tests_sources
     demo_shiftworkspaceup.cpp
+    demo_showpicture.cpp
     demo_taskbarthumbnail.cpp
     howto.cpp
     test_input.cpp
@@ -89,6 +90,7 @@ install( FILES
     thumbnailaside.desktop
     zoom.desktop
     demo_shiftworkspaceup.desktop
+    demo_showpicture.desktop
     demo_taskbarthumbnail.desktop
     test_input.desktop
     test_thumbnail.desktop

effects/demo_shiftworkspaceup.h

@@ -8,8 +8,8 @@ You can Freely distribute this program under the GNU General Public
 License. See the file "COPYING" for the exact licensing terms.
 ******************************************************************/
 
-#ifndef KWIN_TEST_SHIFTWORKSPACEUP_H
-#define KWIN_TEST_SHIFTWORKSPACEUP_H
+#ifndef KWIN_DEMO_SHIFTWORKSPACEUP_H
+#define KWIN_DEMO_SHIFTWORKSPACEUP_H
 
 #include <qtimer.h>
 

effects/demo_showpicture.cpp

@@ -0,0 +1,92 @@
+/*****************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
+
+You can Freely distribute this program under the GNU General Public
+License. See the file "COPYING" for the exact licensing terms.
+******************************************************************/
+
+#include "demo_showpicture.h"
+
+#include <kstandarddirs.h>
+#include <qimage.h>
+
+namespace KWin
+{
+
+KWIN_EFFECT( Demo_ShowPicture, ShowPictureEffect )
+
+ShowPictureEffect::ShowPictureEffect()
+    : init( true )
+    , picture( NULL )
+    {
+    }
+
+ShowPictureEffect::~ShowPictureEffect()
+    {
+    delete picture;
+    }
+
+void ShowPictureEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
+    {
+    effects->paintScreen( mask, region, data );
+#ifdef HAVE_OPENGL
+    if( init )
+        {
+        loadPicture();
+        init = false;
+        }
+    if( picture && region.intersects( pictureRect ))
+        {
+        glPushAttrib( GL_CURRENT_BIT | GL_ENABLE_BIT );
+        picture->bind();
+        glEnable( GL_BLEND );
+        glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+        glEnableClientState( GL_VERTEX_ARRAY );
+        int x = pictureRect.x();
+        int y = pictureRect.y();
+        int width = pictureRect.width();
+        int height = pictureRect.height();
+        int verts[ 4 * 2 ] =
+            {
+            x, y,
+            x, y + height,
+            x + width, y + height,
+            x + width, y
+            };
+        glVertexPointer( 2, GL_INT, 0, verts );
+        glEnableClientState( GL_TEXTURE_COORD_ARRAY );
+        int texcoords[ 4 * 2 ] =
+            {
+            0, 1,
+            0, 0,
+            1, 0,
+            1, 1
+            };
+        glTexCoordPointer( 2, GL_INT, 0, texcoords );
+        glDrawArrays( GL_QUADS, 0, 4 );
+        glDisableClientState( GL_TEXTURE_COORD_ARRAY );
+        glDisableClientState( GL_VERTEX_ARRAY );
+        picture->unbind();
+        glPopAttrib();
+        }
+#endif
+    }
+
+void ShowPictureEffect::loadPicture()
+    {
+#ifdef HAVE_OPENGL
+    QString file = KGlobal::dirs()->findResource( "appdata", "showpicture.png" );
+    if( file.isEmpty())
+        return;
+    QImage im( file );
+    QRect area = effects->clientArea( PlacementArea, QPoint( 0, 0 ), effects->currentDesktop());
+    picture = new GLTexture( im );
+    pictureRect = QRect( area.x() + ( area.width() - im.width()) / 2,
+        area.y() + ( area.height() - im.height()) / 2, im.width(), im.height());
+#endif
+    }
+
+} // namespace

effects/demo_showpicture.desktop

@@ -0,0 +1,5 @@
+[Desktop Entry]
+Encoding=UTF-8
+Name=Demo_ShowPicture
+X-KDE-Library=kwin4_effect_tests
+

effects/demo_showpicture.h

@@ -0,0 +1,36 @@
+/*****************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
+
+You can Freely distribute this program under the GNU General Public
+License. See the file "COPYING" for the exact licensing terms.
+******************************************************************/
+
+#ifndef KWIN_DEMO_SHOWPICTURE_H
+#define KWIN_DEMO_SHOWPICTURE_H
+
+#include <kwineffects.h>
+#include <kwinglutils.h>
+
+namespace KWin
+{
+
+class ShowPictureEffect
+    : public Effect
+    {
+    public:
+        ShowPictureEffect();
+        virtual ~ShowPictureEffect();
+        virtual void paintScreen( int mask, QRegion region, ScreenPaintData& data );
+    private:
+        void loadPicture();
+        bool init;
+        GLTexture* picture;
+        QRect pictureRect;
+    };
+
+} // namespace
+
+#endif

effects/demo_taskbarthumbnail.h

@@ -8,8 +8,8 @@ You can Freely distribute this program under the GNU General Public
 License. See the file "COPYING" for the exact licensing terms.
 ******************************************************************/
 
-#ifndef KWIN_TASKBARTHUMBNAIL_H
-#define KWIN_TASKBARTHUMBNAIL_H
+#ifndef KWIN_DEMO_TASKBARTHUMBNAIL_H
+#define KWIN_DEMO_TASKBARTHUMBNAIL_H
 
 // Include with base class for effects.
 #include <kwineffects.h>