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96 lines
2.9 KiB
96 lines
2.9 KiB
This file describes how to set up kwin_composite. Note that since it is still |
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a work in progress, this file may possibly get out of date at times. |
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See file HACKING for details on developing KWin, including building |
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the kwin_composite branch. |
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See file COMPOSITE_TODO for a list of things that still need to be done. |
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See effects/howto.* for a HOWTO on writting effects. |
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See documentation in source (mainly in scene.cpp) for description |
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of the design of the compositing framework. |
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After starting, KWin's debug output also says which compositing backend it uses, e.g. |
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"OpenGL compositing". If it does not, most probably your X is not configured properly. |
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nVidia: |
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=========== |
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8xxx drivers and newer work, only 9xxx and later drivers provide TFP (texture_from_pixmap) |
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functionality. |
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You need in xorg.conf |
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Option "AddARGBGLXVisuals" "True" |
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in 'Section "Screen"' and also the XComposite extension enabled: |
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Section "Extensions" |
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Option "Composite" "Enable" |
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EndSection |
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Issues: |
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------- |
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When switching away from the X session KWin freezes in nvidia's OpenGL library |
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- turn off GLVSync option (see below) |
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TFP mode (see GLMode below) doesn't work with windows with certain sizes (32x32) |
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- already fixed in latest drivers |
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Refresh rate is slower than it should be |
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- nvidia drivers use refresh rate to work around some X limitations |
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- disable DynamicTwinView (see nvidia README) |
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- should(?) be fixed with drivers updated for xrandr1.2 |
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ATI: |
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======== |
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The radeon driver should work for R200 chips, it's worse with R300 chips. |
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TODO - fglrx - no idea |
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You need in xorg.conf the XComposite extension enabled: |
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Section "Extensions" |
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Option "Composite" "Enable" |
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EndSection |
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Also using |
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Option "XaaNoOffscreenPixmaps" "true" |
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in 'Section "Screen"' may improve performance for non-TFP (texture_from_pixmap) modes. |
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For the TFP mode AIGLX needs to work. With AIGLX direct rendering should be disabled |
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(see GLDirect below, with X.org older than 7.2 "export LIBGL_ALWAYS_INDIRECT=1" before |
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running kwin may be necessary). |
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Intel: |
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======= |
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TODO - no idea. Possibly similar to ATI. |
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Configuration options: |
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====================== |
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All general configuration option are in group [Translucency] in kwinrc config file: |
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UseTranslucency=<true|false> - enables/disables compositing support |
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GLMode=<TFP|SHM|Fallback> - selects texture creating mode |
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RefreshRate=<number> - manually specified refresh rate, should be usually automatically detected |
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GLDirect=<true|false> - enables/disables direct rendering |
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GLVSync=<true|false> - enables/disables synchronizing with monitor refresh |
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ShowFPSEffect: |
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Options are in group [EffectShowFps] in kwinrc config file: |
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Alpha=<number 0.0-1.0> - transparency |
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X=<number> - X position, negative is from the right edge, -10000 is exactly right edge |
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Y=<number> = Y position, the same like X |
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Effects: |
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======== |
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Effects can be enabled/disabled in KConfig module accessible by right-clicking |
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on a window title, choosing "Configure Window Behaviour" and then |
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"Window Effects".
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