(FILECREATED "28-Nov-84 13:47:29" {ERIS}<LISPNEW>SOURCES>INTERPRESSBITMAPPATCH.;1
 4883   )


(* Copyright (c) 1984 by Xerox Corporation. All rights reserved.)

(PRETTYCOMPRINT INTERPRESSBITMAPPATCHCOMS)

(RPAQQ INTERPRESSBITMAPPATCHCOMS
 ((FNS SHOWBITMAP1.IP)))
(DEFINEQ

(SHOWBITMAP1.IP

  [LAMBDA (IPSTREAM BITMAP LEFT FIRSTROW XPIXELS YPIXELS SCALEFACTOR ROTATION HEIGHT XBYTES 
		    REGIONBOTTOM)                            (* jds "28-Nov-84 13:31")

                                                             (* Move a segment of bitmap to an INTERPRESS file.)

                                                             (* FIRSTROW is the row count -- STARTING FROM THE TOP 

							     OF THE BITMAP AS ZERO -- for the first row to be 

							     displayed.)

    (
PROG
 [(TOTALBYTES (
ITIMES
 XBYTES YPIXELS))
	   (SCRATCHBM (
BITMAPCREATE
 (CEIL XPIXELS BITSPERCELL)
				    1))
	   (BMBASE (
\ADDBASE
 (fetch
 (BITMAP BITMAPBASE) of
 BITMAP)
			     (
ITIMES
 (
IDIFFERENCE
 (
IPLUS
 HEIGHT (
OR
 REGIONBOTTOM 0))
						  (
IPLUS
 FIRSTROW YPIXELS))
				     (fetch
 (BITMAP BITMAPRASTERWIDTH) of
 BITMAP]
          (
APPENDOP.IP
 IPSTREAM DOSAVESIMPLEBODY)
          (
APPENDOP.IP
 IPSTREAM {)                           (* Start the SIMPLEBODY for displaying this part of the

							     bitmap.)

          (
TRANS.IP
 IPSTREAM)                                (* Translate to the current position)

          (
APPENDNUMBER.IP
 IPSTREAM YPIXELS)                 (* For the master, this is the number of pixels in the 

							     slow direction)

          (
APPENDNUMBER.IP
 IPSTREAM (CEIL XPIXELS BITSPERCELL))
                                                             (* Number of pixels in the master's fast direction)

          (
APPENDINTEGER.IP
 IPSTREAM 1)                      (* Reserved for future expansion)

          (
APPENDINTEGER.IP
 IPSTREAM 1)
          (
APPENDINTEGER.IP
 IPSTREAM 1)
          (
SELECTQ
 (
IMOD
 (
OR
 ROTATION 0)
			 360)
		   (0                                        (* Bitmaps are really shown on their sides, hanging 

							     from the upper left corner (I think--JDS))

		      (
ROTATE.IP
 IPSTREAM -90)
		      (
TRANSLATE.IP
 IPSTREAM 0 (
IDIFFERENCE
 HEIGHT FIRSTROW))

          (* Push this segment up to its "true" height -- i.e., The first segment gets pushed up all the way 

	  (since it's the top of the bitmap), the next segment gets pushed up HEIGHT-#ofRowsIn1stSeg (to account for the first

	  segment), and so on.)



		      (
CONCAT.IP
 IPSTREAM))
		   (90                                       (* need nop)

		       (
TRANSLATE.IP
 IPSTREAM (
IDIFFERENCE
 HEIGHT (
IPLUS
 FIRSTROW YPIXELS))
				     0)

          (* Push this segment up to its "true" bottom -- i.e., The first segment gets pushed up to 

	  bitmapHeight-HeightOfSegment (since it's the top of the bitmap), the next segment gets pushed up 

	  HEIGHT-RowsIn1stSeg-RowsThisSeg (to account for the first segment), and so on.)



		       )
		   (180                                      (* The translation for this hasn't been tested yet.

							     It may well be the inverse of the rotation-0 

							     correction)

			(
ROTATE.IP
 IPSTREAM 90)
			(
TRANSLATE.IP
 IPSTREAM XPIXELS 0)
			(
CONCAT.IP
 IPSTREAM))
		   (270                                      (* The translation for this hasn't been tested yet.

							     It may well be the inverse of the rotation-90 

							     correction)

			(
ROTATE.IP
 IPSTREAM 180)
			(
TRANSLATE.IP
 IPSTREAM 0 XPIXELS)
			(
CONCAT.IP
 IPSTREAM))
		   (
ERROR
 ROTATION "rotation by other than multiples of 90 degrees not implemented"))
          (
SCALE.IP
 IPSTREAM SCALEFACTOR)                    (* Scale the bitmap to its final size)

          (
CONCAT.IP
 IPSTREAM)
          (
APPENDSEQUENCEDESCRIPTOR.IP
 IPSTREAM SEQPACKEDPIXELVECTOR (
IPLUS
 4 TOTALBYTES))
          (
APPENDINT.IP
 IPSTREAM 1 2)
          (
APPENDINT.IP
 IPSTREAM XPIXELS 2)

          (* * Now put put the bitmap -- each line must be a 32-bit multiple long)



          (for
 Y (XWORDS ←(FOLDHI XBYTES BYTESPERWORD)) from
 1 to
 YPIXELS
	     do
 (
BITBLT
 BITMAP (
OR
 LEFT 0)
			(
IDIFFERENCE
 (
IPLUS
 (
OR
 REGIONBOTTOM 0)
					    FIRSTROW YPIXELS)
				     Y)
			SCRATCHBM 0 0 XPIXELS 1 (
QUOTE
 INPUT)
			(
QUOTE
 REPLACE))
		(
\BOUTS
 IPSTREAM (fetch
 (BITMAP BITMAPBASE) of
 SCRATCHBM)
			0
			(CEIL XBYTES BYTESPERCELL)))
          (
APPENDOP.IP
 IPSTREAM MAKEPIXELARRAY)
          (
APPENDOP.IP
 IPSTREAM MASKPIXEL)
          (
APPENDOP.IP
 IPSTREAM }])
)
(PUTPROPS INTERPRESSBITMAPPATCH COPYRIGHT ("Xerox Corporation" 1984))
(DECLARE: DONTCOPY
  (FILEMAP (NIL (271 4791 (SHOWBITMAP1.IP 281 . 4789)))))
STOP