From 4607cab829761cb0f802d41e5f68f949e74569c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lubo=C5=A1=20Lu=C5=88=C3=A1k?= <l.lunak@kde.org>
Date: Sun, 3 Dec 2006 13:38:57 +0000
Subject: [PATCH] Config option for whether zooming should be smooth or fast.

svn path=/branches/work/kwin_composite/; revision=610138
---
 options.cpp       |  2 ++
 options.h         |  2 ++
 scene_opengl.cpp  | 10 ++++++++++
 scene_xrender.cpp |  4 ++++
 4 files changed, 18 insertions(+)

diff --git a/options.cpp b/options.cpp
index 70a619b0ec..d46f5bf43a 100644
--- a/options.cpp
+++ b/options.cpp
@@ -195,6 +195,8 @@ unsigned long Options::updateSettings()
     onlyDecoTranslucent = config->readEntry("OnlyDecoTranslucent", QVariant(false)).toBool();
     
     refreshRate = config->readEntry( "RefreshRate", 0 );
+    smoothScale = qBound( -1, config->readEntry( "SmoothScale", -1 ), 1 );
+
     QString glmode = config->readEntry("GLMode", "TFP" ).upper();
     if( glmode == "TFP" )
         glMode = GLTFP;
diff --git a/options.h b/options.h
index 621fb7aba9..f86e249cd1 100644
--- a/options.h
+++ b/options.h
@@ -301,6 +301,8 @@ class Options : public KDecorationOptions
         bool onlyDecoTranslucent;
         
         uint refreshRate;
+        int smoothScale; // 0 = no, 1 = yes, -1 = auto
+        
         enum GLMode { GLTFP, GLSHM, GLFallback };
         GLMode glMode;
         bool glAlwaysRebind;
diff --git a/scene_opengl.cpp b/scene_opengl.cpp
index 788291bb47..2d24653727 100644
--- a/scene_opengl.cpp
+++ b/scene_opengl.cpp
@@ -806,6 +806,16 @@ void SceneOpenGL::Window::enableTexture()
         assert( bound_pixmap != None );
         glXBindTexImageEXT( display(), bound_glxpixmap, GLX_FRONT_LEFT_EXT, NULL );
         }
+    if( options->smoothScale != 0 ) // default to yes
+        {
+        glTexParameteri( GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+        glTexParameteri( GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+        }
+    else
+        {
+        glTexParameteri( GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
+        glTexParameteri( GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
+        }
     }
 
 void SceneOpenGL::Window::disableTexture()
diff --git a/scene_xrender.cpp b/scene_xrender.cpp
index 3f604defae..28eadc02e2 100644
--- a/scene_xrender.cpp
+++ b/scene_xrender.cpp
@@ -394,6 +394,8 @@ void SceneXrender::Window::performPaint( int mask, QRegion region, WindowPaintDa
         XRenderSetPictureTransform( display(), pic, &xform );
         width = (int)(width * xscale);
         height = (int)(height * yscale);
+        if( options->smoothScale == 1 ) // only when forced, it's slow
+            XRenderSetPictureFilter( display(), pic, "good", NULL, 0 );
         }
     if( opaque )
         {
@@ -414,6 +416,8 @@ void SceneXrender::Window::performPaint( int mask, QRegion region, WindowPaintDa
             { XDoubleToFixed( 0 ), XDoubleToFixed( 0 ), XDoubleToFixed( 1 ) }
         }};
         XRenderSetPictureTransform( display(), pic, &xform );
+        if( options->smoothScale == 1 )
+            XRenderSetPictureFilter( display(), pic, "fast", NULL, 0 );
         }
     XFixesSetPictureClipRegion( display(), buffer, 0, 0, None );
     }