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- GIF_view v. 4 - March 1992
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- GIF images viewer
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- plus
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- GIF to IFF converter
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- Copyright ⌐ 1991,92 by Lorenzo Musto
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- GIF images viewer plus
- GIF to IFF converter .
- GIF_view is a program allows to view all images which data
- are organized following the GIF format as well as to convert
- them into ones matching IFF standards.
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- This is version 4, of it, which follows the 2 one.
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- The main improvements were done to make the program more
- fast and Intuition-like; with this goal keeped in mind
- the decompression phase were redesigned to make it more
- efficient and then coded in assembly.
- About Intuition compatibility I just attached the image's
- bitmaps to a screen, handling as well as possible (for me)
- strange situation. Besides I have introduced an overscan
- to do nice playing with bigger than screen images.
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- At this time the program isn't just a fast viewer but comes
- with saving function which allows to create an IFF file.
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- A windmill signals the program's run which may be aborted
- by CTRL-C as expected.
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- All that results in a source code made-up by about thousand
- lines of C code mixed to assembly one, allowing to get an
- high speed with a low use of memory.
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- No particular hw/sw is required to run this program;
- it suits well on PAL systems as well as on those NTSC.
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- This work is dedicated to my father.
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- Author
- Contact me for every issue about this work:
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- paper: Lorenzo Musto
- via A. Cantele 11,
- 35129 Padova (Italy)
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- e-mail: maciste@alessia.dei.unipd.it ( INTERNET )
- alessia.dei.unipd.it!argo!root ( UUCP )
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- phone: +39 49 609356
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- Distribution
- GIF_view is a shareware program.
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- GIF_view is also a copyrighted piece of software.
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- You may copy or upload archive wherever you choose but only
- complete and unchanged. You are not allowed to sell GIF_view
- for profit, or include GIF_view on a disk which is sold for
- profit, without the author's (Lorenzo Musto) permission.
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- If you often use it, please pay me a donation of 10 US$ or
- equivalent in any cash. Therefore you will get from me one
- update service without the troublesome requester. Please send
- money and no check.
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- Usage - Template
- GIF_view <filename> [QUICK] [TIME n] [SAVE filename[.iff]]
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- QUICK allows to gain 'speed, resolution, memory'
- but to the detriment of image's color features.
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- TIME allows to set time-out mechanism to <n> seconds;
- default value is twenty.
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- SAVE allows to save into file <filename> what results
- from decompression step, i.e. displayed picture,
- following IFF standards.
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- --------
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- KeyStrokes
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- - carriage return
- ends displaying phase.
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- - arrow keys
- scrolling.
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- - numeric keypad
- [1..4]
- [6..9] active only with images bigger than screen they
- allow to scroll around.
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- [0] refreshes whole display area.
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- [5] puts screen to back.
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- - CTRL-C
- aborts execution freeing all allocated resources.
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- Trademarks
- GIF and 'Graphics Interchange Format' are trademarks of
- CompuServe, Incorporated.
- an H&R Block Company
- 5000 Arlington Centre Blvd.
- Columbus, Ohio 43220
- (614) 457-8600
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- "ILBM" IFF Interleaved Bitmap, from Electronic Arts.
- Electronic Arts[tm] is a trademark of Electronic Arts.
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- History
- o may-91 version 0 but prototype.
- o aug-91 version 1
- o 02-oct-91 Idiosyncrasy for B&W images removed.
- o 02-oct-91 Approximation of the 'Color Map' refined.
- o 04-oct-91 Fixed a bug.
- o 05-oct-91 version 2.
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- o nov-91 fall into intuition: screen, overscan.
- o dec-91 optimization of code.
- o jan-92 appears assembly-code to do critical steps.
- o mar-92 set up TIME and SAVE options.
- o 08-mar-92 buffered output on writing IFF destination file.
- o 10-mar-92 version 4.
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