gl.PixelZoom(xfactor, yfactor)
gl.PixelZoom()
specifies values for the x and y zoom factors. During the execution of gl.DrawPixels() or
gl.CopyPixels(), 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.
Please consult an OpenGL reference manual for more information.
#GL_INVALID_OPERATION
is generated if glPixelZoom is executed between the execution of gl.Begin() and the corresponding execution of gl.End().
#GL_ZOOM_X
gl.Get() with argument #GL_ZOOM_Y