|The PLplot Plotting Library: Programmer's Reference Manual|
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Set the memory area to be plotted (with the "memcairo"
driver) as the dev member of the stream structure.
Also set the number of pixels in the memory passed in
plotmem, which is a block of memory
maxx by 4 bytes
long, say: 480 x 640 x 4 (Y, X, RGBA)
This memory will have to be freed by the user!
plsmema(maxx, maxy, plotmem)
This function is not used in any examples.