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NAME
- WritePixel
-
Change the pen num of one specific pixel in a specified RastPort.
SYNOPSIS
error = WritePixel( rp, x, y)
d0 a1 D0 D1
LONG WritePixel( struct RastPort *, SHORT, SHORT );
LONG WritePixel( struct RastPort *, SHORT, SHORT );
FUNCTION
Changes the pen number of the selected pixel in the specified RastPort to that currently specified by PenA, the primary drawing pen. Obeys minterms in RastPort.
INPUTS
- rp
-
a pointer to the RastPort structure
- x
-
see next
- y
-
point within the RastPort at which the selected pixel is located.
RESULT
- error
-
0 if pixel succesfully changed. -1 if (x,y) is outside the RastPort