BMP.svobject

  © 1994 by Andreas R. Kleinert.

  FREEWARE. All rights reserved.

  Version      : 2.4
  Release Date : 27.03.1994


  Description
  ~~~~~~~~~~~
  BMP.svobject is an external Library-Module for the superview.library V2+.

  It contains SVDriver-Support for the superview.library V3+, and
  needs any SVDriver with ChunkyPixel-Support.

  It supports reading and writing of Windows V3.00 BMP Files.
  In detail these are :

  Reading :

   - BMP : 1, 4 or 8 Bit "wallpapers". No 24-Bit pictures.

  Writing :

   Depending on the Colordepth of the source the following is written :

   Source Colors    Version	 Type		   Destination Colors

	   2	    BMP V3.00	 packed chk. pix.    2
    4 ..  16	    BMP V3.00	 packed chk. pix.   16
   32 .. 256	    BMP V3.00	 chunky pixel	   256


  Author
  ~~~~~~
  Andreas R. Kleinert
  Grube Hohe Grethe 23
  D-57074 Siegen
  Germany


  History
  ~~~~~~~
  V2.4 (27.03.1994) :

   - removed internal SVDriver-Replacement, so that we now are really
     dependent on external SVDrivers in libs:svdrivers.
     This saves about 1600 Bytes diskspace and reduces redundancy.
   - replaced SAS/C's sprintf()-routine with own, RawDoFmt()-based one.
     This saves again about 1800 Bytes.
   - now using Utility-Library for integer operations (activated
     SAS/C's UTILLIB option) : this increases 68000-codesize a little
     bit, but increases speed on 68020+ systems
     (should also decrease codesize, but does not ...)


  V2.3 (25.03.1994) :

   - slightly improved internal BitMap-to-BitMap routine
   - there occured some bugs with graphics, which had a width, that did not
     automatically implied longword-alignment :
     Now the inserted pad-bytes are read correctly for those files.
     - THIS STILL HAS TO BE FIXED FOR WRITING BMP-Files -


  V2.2 (17.03.1994) :

   - fixed "large memory usage" bug in internal ECS-ChunkyPixel routine
   - added several security checks (zero-pointers)
   - fixed bug in reading and writing of "Black & White" (2 Colors)
     BMP-Files, also changed docs (and revision notes) as far as affected
     by the bug-fix
   - note, that 4 Color BMP Files - following to the spefifications they
     do not exist - will neither be read nor be written (8; 2:2:2:2)
   - cleaned up some garbage in this doc-file ;)


  V2.1 (09.03.1994) :

   - now with SVDriver-Support. Not yet necessarily needed.
   - improved internal "Chunky Pixel to BitMap" (8 Bit) Routine
   - fixed some small bugs in reading : handling ColorMaps handled
     correctly now
   - writing routine(s) :
      - added code for writing 2 .. 256 Color graphics
      -   2 Colors are written as packed chunky pixel  (8; 1:1:1:1:1:1:1:1)
      -  16 Colors are written as packed chunky pixel  (8; 4:4)
      - 256 Colors are written as chunky pixel	       (8; 8)
      - 4, 8, 32, 64 or 128 Colors are expanded to either
	16 or 256 Colors before writing
   - internal routines : AUTOSCROLL now really works with big-sized Screens
   - fixed small bug in memory management routines
   - fixed several little bugs


  V1.2 (26.01.1994) :

   - fixed code for recognition of "not supported" (future or 24-Bit) Files


  V1.1 (24.01.1994) :

   - first version


  Literature
  ~~~~~~~~~~
  [1] "Supercharged Bitmapped Graphics", Steve Rimmer, Windcrest/McGraw-Hill,
       © 1992 by Windcrest Books (registered Trademark of TAB Books).
       ISBN 0-8306-3788-5
  [2] "DOS Extra", Issue 4/1993, DMV-Verlag


  Copyrights
  ~~~~~~~~~~
  Some of the mentioned names or products above may be copyrighted by
  companies or trademarks of companies.