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Oliver Roberts (ANF)

WarpTIFF-introduction - New TIFF-picture datatype
Oliver Roberts introduces his new WarpTIFF freeware-datatype with the following message. This new datatype can also read pictures which were made under TIFF specifications 5.0 and 6.0. The datatype was optimized for 68k, WarpOS and native MorphOS and is of course very fast.

It follows the original message:

The first release of WarpTIFF is now available - a new freeware datatype capable of reading 5.0 and 6.0 TIFF spec images, available in optimized 68k, WarpOS and native MorphOS versions. Needless to say, WarpTIFF is fast - very fast in fact :) Full feature list below. WarpDTPrefs has also been updated to support WarpTIFF.

  • Supports 5.0 and 6.0 TIFF spec, including Packbits, Thunderscan, CCITT (fax), Pixar, LogLuv (CIE and SGILog) and Deflate (zip) encodings, and uncompressed files. LZW and JPEG encodings are currently unsupported
  • Image types supported include RGB (24-bit and 48-bit), palette based and greyscale (1-bit, 4-bit, 8-bit and 16-bit)
  • Supports image data organized as strips, tiles or separate components
  • Highly optimized datatype dispatch engine, and fast TIFF decoder, resulting in a very efficient, compact and quick TIFF datatype
  • Asynchronous file i/o and double buffering techniques (WarpOS only), which speeds up image decoding
  • Optimized versions for 68020, 030, 040 and 060
  • PowerPC support with native WarpOS and native MorphOS versions
  • Alter the pen allocation precision when images are remapped to an 8-bit display
  • Specific support for the OS 3.5/3.9 picture.datatype, when available
  • The dithering feature of the OS 3.5/3.9 picture.datatype can be configured to your liking (e.g. disabled for 15/16-bit displays)
  • Based on libtiff 3.5.6-beta and zlib 1.1.3

As some of you will know, WarpTIFF has been in development (on and off) for some time, but it's ready at last :) It already handles a more comprehensive coverage of various TIFF encodings than other TIFF datatypes, but if you should find some TIFF images that don't work properly with WarpTIFF, then please let me know and I'll try to add support for them. Likewise, if you need support for JPEG encoded TIFFs, let me know.
(ps) (Translation: dr)

[News message: 01. Aug. 2001, 19:48] [Comments: 0]
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