_x_f_a_c_t_o_r, _y_f_a_c_t_o_r Specify the x and y zoom factors for pixel write
operations.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
ffffggggllllPPPPiiiixxxxeeeellllZZZZoooooooommmm specifies values for the x and y zoom factors. During the
execution of ffffggggllllDDDDrrrraaaawwwwPPPPiiiixxxxeeeellllssss or ffffggggllllCCCCooooppppyyyyPPPPiiiixxxxeeeellllssss, 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.
EEEERRRRRRRROOOORRRRSSSS
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ffffggggllllPPPPiiiixxxxeeeellllZZZZoooooooommmm is executed between the
execution of ffffggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of ffffggggllllEEEEnnnndddd.