GLfloat yfactor )

PARAMETERS
       xfactor, yfactor Specify the x and y zoom factors for pixel write opera‐
                        tions.

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 bot‐
       tom 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

                                                                GLPIXELZOOM(3G)