BltMaskBitMapRastPort.md

NAME

BltMaskBitMapRastPort -- blit from source bitmap to destination rastport with masking of source image.

SYNOPSIS

    BltMaskBitMapRastPort
        (srcbm, srcx, srcy, destrp, destX, destY, sizeX, sizeY,
         A0     D0    D1    A1      D2     D3     D4     D5
         minterm, bltmask)
         D6       A2

    void BltMaskBitMapRastPort
         (struct BitMap *, WORD, WORD, struct RastPort *, WORD, WORD,
          WORD, WORD, UBYTE, APTR);

Links: BitMap RastPort

FUNCTION

Blits from source bitmap to position specified in destination rastport using bltmask to determine where source overlays destination, and minterm to determine whether to copy the source image "as is" or to "invert" the sense of the source image when copying. In either case, blit only occurs where the mask is non-zero.

INPUTS

srcbm - a pointer to the source bitmap srcx - x offset into source bitmap srcy - y offset into source bitmap destrp - a pointer to the destination rastport destX - x offset into dest rastport destY - y offset into dest rastport sizeX - width of blit in pixels sizeY - height of blit in rows minterm - either (ABC|ABNC|ANBC) if copy source and blit thru mask or (ANBC) if invert source and blit thru mask bltmask - pointer to the single bit-plane mask, which must be the same size and dimensions as the planes of the source bitmap.

RESULT

BUGS

SEE ALSO

BltBitMapRastPort graphics/gfx.h graphics/rastport.h