Always rebinding should not make sense anymore.

svn path=/trunk/KDE/kdebase/workspace/; revision=677309

COMPOSITE_HOWTO

@@ -79,7 +79,6 @@ All general configuration option are in group [Translucency] in kwinrc config fi
 UseTranslucency=<true|false> - enables/disables compositing support
 GLMode=<TFP|SHM|Fallback> - selects texture creating mode
 RefreshRate=<number> - manually specified refresh rate, should be usually automatically detected
-GLAlwaysRebind=<true|false> - may increase speed with some graphics cards
 GLDirect=<true|false> - enables/disables direct rendering
 GLVSync=<true|false> - enables/disables synchronizing with monitor refresh
 

COMPOSITE_TODO

@@ -108,10 +108,6 @@ OpenGL TODO
         - ati (others?): power_of_two windows are drawn white unless non-tfp_mode
             is forced in findTextureTarget()
 
-? in SceneOpenGL::bindTexture() with tfp_mode, with some gfx cards it seems
-    to be faster to not short-circuit the texture binding when there's been
-    no damage
-
 + strict binding
     - there is code to support strict binding as required by AIGLX, but it's disabled, because
         copy_buffer in bindTexture() ensures strict binding as a side-effect

options.cpp

@@ -190,7 +190,6 @@ unsigned long Options::updateSettings()
         glMode = GLSHM;
     else
         glMode = GLFallback;
-    glAlwaysRebind = config.readEntry("GLAlwaysRebind", false );
     glDirect = config.readEntry("GLDirect", true );
     glVSync = config.readEntry("GLVSync", true );
     glStrictBinding = config.readEntry( "GLStrictBinding", false );

options.h

@@ -298,7 +298,6 @@ class Options : public KDecorationOptions
         
         enum GLMode { GLTFP, GLSHM, GLFallback };
         GLMode glMode;
-        bool glAlwaysRebind;
         bool glDirect;
         bool glVSync;
         bool glStrictBinding;

scene_opengl.cpp

@@ -1107,8 +1107,7 @@ void SceneOpenGL::Window::prepareForPainting()
 // Bind the window pixmap to an OpenGL texture.
 bool SceneOpenGL::Window::bindTexture()
     {
-    if( texture.texture() != None && toplevel->damage().isEmpty()
-        && !options->glAlwaysRebind ) // interestingly with some gfx cards always rebinding is faster
+    if( texture.texture() != None && toplevel->damage().isEmpty())
         {
         // texture doesn't need updating, just bind it
         glBindTexture( texture.target(), texture.texture());