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WritePixelLine8.md

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NAME

WritePixelLine8 -- write the pen number value of a horizontal line of pixels starting at a specified x,y location and continuing right for count pixels. (V36)

SYNOPSIS

    count = WritePixelLine8(rp,xstart,ystart,width,array,temprp)
    D0                      A0 D0:16  D1:16  D2    A2    A1

    LONG WritePixelLine8(struct RastPort *, UWORD, UWORD,
         UWORD, UBYTE *, struct RastPort *);

Links: RastPort RastPort

FUNCTION

For each pixel in a horizontal 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 (x,y) - a point in the RastPort width - count of horizontal pixels to write array - pointer to an array of UBYTEs from which to fetch the pixel data allocate at least (((width+15)>>4)<<4) 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 width must be non negative

BUGS

SEE ALSO

WritePixel graphics/rastport.h