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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13083 b3059339-0415-0410-9bf9-f77b7e298cf2
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@ -487,13 +487,13 @@ a (possibly slow) conversion has to be done.
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</formalpara>
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</formalpara>
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<para>
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<para>
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If you should be lucky enough to have enough offscreen memory left to
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If you should be lucky enough to have enough offscreen memory left to
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put a whole image there, the DGA driver will use doublebuffering, which
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put a whole image there, the DGA driver will use double buffering, which
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results in much smoother movie replaying. It will tell you whether
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results in much smoother movie replaying. It will tell you whether
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doublebuffering is enabled or not.
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double buffering is enabled or not.
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</para>
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</para>
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<para>
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<para>
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Doublebuffering means that the next frame of your video is being drawn in
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Double buffering means that the next frame of your video is being drawn in
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some offscreen memory while the current frame is being displayed. When the
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some offscreen memory while the current frame is being displayed. When the
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next frame is ready, the graphics chip is just told the location in memory
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next frame is ready, the graphics chip is just told the location in memory
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of the new frame and simply fetches the data to be displayed from there.
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of the new frame and simply fetches the data to be displayed from there.
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@ -502,11 +502,11 @@ video data.
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</para>
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</para>
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<para>
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<para>
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Doublebuffering may be switched on by using the option
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Double buffering may be switched on by using the option
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<option>-double</option> and may be disabled with
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<option>-double</option> and may be disabled with
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<option>-nodouble</option>. Current default option is to disable
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<option>-nodouble</option>. Current default option is to disable
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doublebuffering. When using the DGA driver, onscreen display (OSD) only
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double buffering. When using the DGA driver, onscreen display (OSD) only
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works with doublebuffering enabled. However, enabling doublebuffering may
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works with double buffering enabled. However, enabling double buffering may
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result in a big speed penalty (on my K6-II+ 525 it used an additional 20%
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result in a big speed penalty (on my K6-II+ 525 it used an additional 20%
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of CPU time!) depending on the implementation of DGA for your hardware.
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of CPU time!) depending on the implementation of DGA for your hardware.
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</para>
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</para>
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@ -579,7 +579,7 @@ with every chipset driver for XFree out there.
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</simpara></listitem>
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</simpara></listitem>
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<listitem><simpara>
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<listitem><simpara>
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Some drivers lie about the amount of memory they map into the process's
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Some drivers lie about the amount of memory they map into the process's
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address space, thus vo_dga won't use doublebuffering (SIS?).
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address space, thus vo_dga won't use double buffering (SIS?).
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</simpara></listitem>
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</simpara></listitem>
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<listitem><simpara>
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<listitem><simpara>
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Some drivers seem to fail to report even a single valid mode. In this
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Some drivers seem to fail to report even a single valid mode. In this
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@ -587,7 +587,7 @@ with every chipset driver for XFree out there.
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100000x100000 or something like that.
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100000x100000 or something like that.
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</simpara></listitem>
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</simpara></listitem>
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<listitem><simpara>
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<listitem><simpara>
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OSD only works with doublebuffering enabled (else it flickers).
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OSD only works with double buffering enabled (else it flickers).
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</simpara></listitem>
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</simpara></listitem>
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</itemizedlist>
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</itemizedlist>
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