Sophie: Io-language-graphics-and-sound-20080330-6.fc15 i686

Io-language-graphics-and-sound-20080330-6.fc15.i686.rpm

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     <STRONG>NAME</STRONG>
	  <STRONG>glPixelZoom</STRONG> -	specify	the pixel zoom factors


     <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
	  void <STRONG>glPixelZoom</STRONG>( GLfloat <EM>xfactor</EM>,
			    GLfloat <EM>yfactor</EM> )


     <STRONG>PARAMETERS</STRONG>
	  <EM>xfactor</EM>, <EM>yfactor</EM> Specify the x and y zoom factors for	pixel
			   write operations.

     <STRONG>DESCRIPTION</STRONG>
	  <STRONG>glPixelZoom</STRONG> specifies	values for the x and y zoom factors.
	  During the execution of <STRONG>glDrawPixels</STRONG> or <STRONG>glCopyPixels</STRONG>,	if
	  (xr, yr) is the current raster position, and a given element
	  is in	the mth	row and	nth column of the pixel	rectangle,
	  then pixels whose centers are	in the rectangle with corners
	  at

		       (xr + n.xfactor,	yr + m.yfactor)

		    (xr	+ (n+1).xfactor, yr + (m+1).yfactor)

	  are candidates for replacement.  Any pixel whose center lies
	  on the bottom	or left	edge of	this rectangular region	is
	  also modified.

	  Pixel	zoom factors are not limited to	positive values.
	  Negative zoom	factors	reflect	the resulting image about the
	  current raster position.

     <STRONG>ERRORS</STRONG>
	  <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glPixelZoom</STRONG> is executed
	  between the execution	of <STRONG>glBegin</STRONG> and the corresponding
	  execution of <STRONG>glEnd</STRONG>.

     <STRONG>ASSOCIATED</STRONG>	<STRONG>GETS</STRONG>
	  <STRONG>glGet</STRONG>	with argument <STRONG>GL_ZOOM_X</STRONG>
	  <STRONG>glGet</STRONG>	with argument <STRONG>GL_ZOOM_Y</STRONG>

     <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>
	  <STRONG>glCopyPixels</STRONG>,	<STRONG>glDrawPixels</STRONG>








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