flush.html

来自「计算机图形学～想必是很多人需要的～在此共享一下」· HTML 代码 · 共 59 行

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<HTML><BODY><PRE>     <STRONG>NAME</STRONG>	  <STRONG>glFlush</STRONG> - force execution of GL commands in finite time     <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>	  void <STRONG>glFlush</STRONG>(	void )     <STRONG>DESCRIPTION</STRONG>	  Different GL implementations buffer commands in several	  different locations, including network buffers and the	  graphics accelerator itself.	<STRONG>glFlush</STRONG>	empties	all of these	  buffers, causing all issued commands to be executed as	  quickly as they are accepted by the actual rendering engine.	  Though this execution	may not	be completed in	any particular	  time period, it does complete	in finite time.	  Because any GL program might be executed over	a network, or	  on an	accelerator that buffers commands, all programs	should	  call <STRONG>glFlush</STRONG> whenever	they count on having all of their	  previously issued commands completed.	 For example, call	  <STRONG>glFlush</STRONG> before waiting for user input	that depends on	the	  generated image.     <STRONG>NOTES</STRONG>	  <STRONG>glFlush</STRONG> can return at	any time.  It does not wait until the	  execution of all previously issued GL	commands is complete.     <STRONG>ERRORS</STRONG>	  <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glFlush</STRONG> is executed	  between the execution	of <STRONG>glBegin</STRONG> and the corresponding	  execution of <STRONG>glEnd</STRONG>.     <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>	  <STRONG>glFinish</STRONG></PRE></BODY></HTML>

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