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WritePixelArray8.md

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NAME

WritePixelArray8 -- write the pen number value of a rectangular array of pixels starting at a specified x,y location and continuing through to another x,y location within a certain RastPort. (V36)

SYNOPSIS

    count = WritePixelArray8(rp,xstart,ystart,xstop,ystop,array,temprp)
    D0                       A0 D0:16  D1:16  D2:16 D3:16  A2   A1

    LONG WritePixelArray8(struct  RastPort *, UWORD, UWORD,
         UWORD, UWORD, UBYTE *, struct  RastPort *);

Links: RastPort RastPort

FUNCTION

For each pixel in a rectangular region, decode the pen number selector from a linear array of pen numbers into the bit-planes used to describe a particular rastport.

INPUTS

rp - pointer to a RastPort structure (xstart,ystart) - starting point in the RastPort (xstop,ystop) - stopping point in the RastPort array - pointer to an array of UBYTEs from which to fetch the pixel data. Allocate at least ((((width+15)>>4)<<4)*(ystop-ystart+1)) bytes. temprp - temporary rastport (copy of rp with Layer set == NULL, temporary memory allocated for temprp->BitMap with Rows set == 1, temprp->BytesPerRow == (((width+15)>>4)<<1), and temporary memory allocated for temprp->BitMap->Planes[])

RESULT For each pixel in the array: Pen - (0..255) number at that position is returned

NOTE xstop must be >= xstart ystop must be >= ystart

BUGS

SEE ALSO

WritePixel graphics/rastport.h