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- GIF_view (v. 2 / october '91)
- by Lorenzo Musto
-
-
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- Description
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- GIF images viewer.
-
- GIF_view is a program that allows to view all images wich data
- are organized following the GIF format.
- All strategies taken to manage the decoding algorithm plus a direct
- image's assembling in memory ( i.e. without calls to any graphic
- primitive like 'WritePixel') allow to reach relatively low decoding
- times.
-
- This program suits perfectly on PAL systems becouse it totaly uses
- the avaible display area (256/512 lines);
- it works right on those NTSC too.
-
- The program starts execution showing some image and screen's details
- obtained from input file. These will be adapted to the amiga graphic
- system allowing scrolling for large images and using HAM-mode for those
- ones with more than 32 colors; then will start the decoding step wich
- output is a dot sequence.
- After a while, whether all gone well, the image should appears.
- At this time the program will be stopped for about twenty seconds;
- then it goes over to terminate unless the user has hit one of the
- following keys:
- - Carriage Return that causes an early exit .
- - Space Bar or Arrow Keys that hangs the program to a Carriage Return.
-
- No action can be taken to abort execution until the image appears
- (any attempt at your own risk: it's probable a loss of memory).
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- Usage/Template
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- GIF_view <filename> [QUICK]
-
- option QUICK allows to gain 'speed, resolution, memory'
- but to the detriment of image's color features.
-
- Explanations about keyboard usage will be given during
- program's running.
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-
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- Author
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- Home Address: Lorenzo Musto
- via A. Cantele 11
- 35129 Padova (Italy)
-
- Internet address: maciste@alessia.dei.unipd.it
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- Phone: +39 49 609356
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-
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- Notes
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- Contact me for every issue about this work ( preferely via e-mail ).
- If you are pleased about it simply spread it but remember that gifts
- of any type (floppies,cards,cakes whatever you think ... even $) as
- counterpart are welcomed.
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- History
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- o ??-may-91 first version but prototype.
- o ??-aug-91 first release.
- o 02-oct-91 Idiosyncrasy for B&W images removed.
- o 02-oct-91 Approximation of the 'Colors Map' refined.
- o 04-oct-91 Fixed a bug.
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- Trademarks
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- G I F (tm)
- Graphics Interchange Format (tm)
- A standard defining a mechanism
- for the storage and transmission
- of raster-based graphics information
- June 15, 1987
- (c) CompuServe Incorporated, 1987
- All rights reserved
-
- 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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