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GLPIXELZOOM(3G)                                                                              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 rect-angular rectangular
       angular 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(3G), glDrawPixels(3G)




                                                                                             GLPIXELZOOM(3G)