centos man page for glpixelzoom

GLPIXELZOOM(3G) 						   OpenGL Manual						   GLPIXELZOOM(3G)

NAME
       glPixelZoom - specify the pixel zoom factors

C SPECIFICATION
       void glPixelZoom(GLfloat xfactor, GLfloat yfactor);

PARAMETERS
       xfactor, yfactor
	   Specify the x and y zoom factors for pixel write operations.

DESCRIPTION
       glPixelZoom specifies values for the x and y zoom factors. During the execution of glDrawPixels() or glCopyPixels(), 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.

ERRORS
       GL_INVALID_OPERATION is generated if glPixelZoom is executed between the execution of glBegin() and the corresponding execution of glEnd().

ASSOCIATED GETS
       glGet() with argument GL_ZOOM_X

       glGet() with argument GL_ZOOM_Y

SEE ALSO
       glCopyPixels(), glDrawPixels()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org							    06/10/2014							   GLPIXELZOOM(3G)