Date:  Sun, 02 Oct 2005 15:46:47 -0300
From:  madodel at ptdprolog.net
Subject:  [VOICENWS] SW: GBM.DLL 1.31 and GBMV2 Bitmap Viewer 1.21


++ From the VOICE OS/2-eComStation News Service http://www.os2voice.org ++

From: heikoDOTnitzscheDESPAM at DESPAMgmx.de 


A new GBM.DLL (version 1.31) together with updated GBM command line tools
is available. 

http://hobbes.nmsu.edu/cgi-bin/h-search?key=gbmos2pm121_gbm131&pushbutton=Search

GBM (Generalised Bitmap Module) is a library for handling many different                      
bitmap file formats. It is used by many OS/2 applications like Mesa,
PM-Raw, PM-Exif. GBMV2 is a PM bitmap viewer and editor that uses GBM.DLL.

The source code is freely available and released as Public Domain. There
are some Open Source libraries used (source code included) that have their
own license (libpng 1.2.8, zlib 1.2.3, libtiff 3.7.3, IJG JPEG 6b). Please
be aware of this when modifying or redistributing the sources.

What's new: (changes to previous release 1.21)

PNG support:
- Fix some issues in reading transparent bitmaps
- Extended support for color depths up to 64 bpp with alpha channel
  (alpha channel is available to the application on request)

TIFF support:
- Original TIF support has been replaced by Libtiff 3.7.3 together with
IJG
  JPEG 6B and ZLib 1.2.3. There are now many compression schemes supported

  (JPEG, Deflate (ZIP), CCITT, LZW, LZW with predictor, ...). Reading and 
  writing them is possible.
- Extended support for color depths up to 64 bpp with alpha channel
  (alpha channel is available to the application on request)

PPM support:
- Original PPM support has been replaced to support reading and writing of

  newer PPM files with 48 bpp
- Multipage PPMs can now be read

GBM command line tools:
- gbmgamma, gbmhdr, gbmref, gbmsize and gbmsub now can handle bitmaps up
to
  64 bpp with alpha channel
- simple bitmap converter gbmconv added
- detect unsupported color depths to prevent crashes

GBM file dialog (GBMDLG) + documentation:
- updated documentation for PNG, TIF and PPM bitmaps including all
available 
  input and output options               

The new GBM.DLL is backward compatible to existing applications. So you
can safely upgrade. Though the extended color depths will not be available
within these applications because this is the first release of GBM.DLL
that supports them. Hopefully there will be soon applications that can
make use of them.

Heiko Nitzsche


--
 Warpstock 2005 - Hershey, Pennsylvania, Oct. 6-9 http://www.warpstock.org
 Warpstock Europe 2005 - Dresden, Germany, Nov. 18-20
http://www.warpstock.net

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