1GLPIXELZOOM(3G)                                                GLPIXELZOOM(3G)
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NAME

6       glPixelZoom - specify the pixel zoom factors
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C SPECIFICATION

10       void glPixelZoom( GLfloat xfactor,
11                         GLfloat yfactor )
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PARAMETERS

15       xfactor, yfactor Specify the x and y zoom factors for pixel write oper‐
16                        ations.
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DESCRIPTION

19       glPixelZoom specifies values for the x and y zoom factors.  During  the
20       execution  of  glDrawPixels or glCopyPixels, if (xr, yr) is the current
21       raster position, and a given element is in the mth row and  nth  column
22       of  the pixel rectangle, then pixels whose centers are in the rectangle
23       with corners at
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25                            (xr+n⋅xfactor, yr+m⋅yfactor)
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27                        (xr+(n+1)⋅xfactor, yr+(m+1)⋅yfactor)
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29       are candidates for replacement.  Any pixel whose  center  lies  on  the
30       bottom or left edge of this rectangular region is also modified.
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32       Pixel  zoom  factors are not limited to positive values.  Negative zoom
33       factors reflect the resulting image about the current raster position.
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ERRORS

36       GL_INVALID_OPERATION is generated if glPixelZoom  is  executed  between
37       the execution of glBegin and the corresponding execution of glEnd.
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ASSOCIATED GETS

40       glGet with argument GL_ZOOM_X
41       glGet with argument GL_ZOOM_Y
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SEE ALSO

44       glCopyPixels(3G), glDrawPixels(3G)
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48                                                               GLPIXELZOOM(3G)