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-
-
- =========================
-
- ShowJPEG V1.6
-
- =========================
-
-
- 26. April, 1995
-
-
- Copyright (c) 1994/95 by Roman Hiestand
-
-
-
-
-
- Copyright notice
- ----------------
-
- The program ShowJPEG and its documentation are written and copyrighted by
- Roman Hiestand. They may be distributed freely providing the following
- restrictions are satisfied:
-
- - Distributors may not charge more than the cost of a diskette used in
- the distribution of this program.
-
- - Distributors may only distribute the unmodified copy of the original
- program, along with it's documentation, and copyright notices intact.
-
- - Commercial distribution is only possible with written permission
- from the author.
-
-
- Disclaimer
- ----------
-
- This program and its documentation is provided "as is". No warranties are made
- with respect to the accuracy, reliability, performance or operation of this
- software and information. You are using this program at your own risk. The
- author is not liable for any damages that may have been caused by using this
- software.
-
-
-
- Introduction
- ------------
-
- It is done ! After hours and hours of hacking, debugging and #@©°!*-ing,
- this peace of software is ready to distribute:
-
- ShowJPEG
-
- the successor to the world-famous (:-) ShowGIF.
- I always wanted to replace the ViewJPEG delivered with the picasso-board,
- because it is buggy, incomplete and slow. But, you can believe me, jpeg
- is a tough and complicated topic. So I decided not to rewrite the whole
- thing but simply use the jpeg link-library from the independent JPEG
- software group. It is fairly quick and customizable, but it's big...
- That's why the program is quite large.
-
-
- Features
- --------
-
- - As compatible to the jpeg-standard as software can be
- - Supports greyscaled pictures
- - Various speed/quality tradeoff settings
- - Fast
- - CLI or WB start
- - Can be aborted anytime (with Ctrl-C or Escape)
- - Filerequester (since V1.2)
- - Pattern matching (since V1.3)
- - Nocrop option (since V1.4)
- - Doesn't switches back to screen behind (since V1.6)
-
- Usage
- -----
-
- From CLI: ShowJPEG File [...]
- From WB : via default tool or extended selection
-
- Template:
- FILE/M,Q=QUALITY/K,SC=SCALE/N,DELAY/N,GRAY=GREY/S,VERBOSE/S,
- 8BIT/S,16BIT/S,24BIT/S,NOCENTER/S,ALL/S,NC=NOCROP/S
-
- The options are accessible from CLI or Workbench.
-
- FILES/M One or more filenames
- Example: ShowJPEG DF0:Pictures/Tron.JPEG
-
- Q=QUALITY/K The quality, one of BEST, NORMAL [default] or FAST.
- BEST is always the best it can do, NORMAL is what I
- considered as good enough but not too slow, and FAST
- is always the fastest.
- For more information see below.
- Examples: ShowJPEG Tron.JPEG Q=BEST
- ShowJPEG Tron.JPEG QUALITY BEST
- ShowJPEG Tron.JPEG Q FAST
- Default: NORMAL
-
- SC=SCALE/N The scale factor, one of 1, 2, 4 or 8 (-> 1/1, 1/2..).
- If you want to see a very large picture in whole or
- you want to have just a quick preview, use scale.
- Example: ShowJPEG BigPicture.jpg SCALE 2
- ShowJPEG VeryBigPicture.jpg SC=8
- Default: 1
-
- DELAY/N Waits n seconds after displaying the picture.
- Example: ShowJPEG Slideshow/*.jpg DELAY=5
- Default: off
-
- GRAY=GREY/S Displays the picture in grayscale. Use this if you
- want to have a quick preview.
- Example: ShowJPEG SlowPicture.jpg GREY
- Default: off
-
- VERBOSE/S Prints out information about the picture:
- Width x Height x Depth of the picture ->
- Width x Height x Depth of the screen
- Example: ShowJPEG VERBOSE Pic.jpg
- Default: off
-
- 8BIT/16BIT/24BIT
- Use these options if you want the picture displayed
- in a certain screen depth. If it doesn't fit the
- screen it's being cropped.
- Example: ShowJPEG 24BIT LargePicture.jpeg
- Default: off, this means the screen is chosen such
- that the whole image fits the screen. If the image
- is larger than the largest 8-Bit-screen the image
- is cropped.
-
- NOCENTER/S Don't display the picture in the center of the
- screen.
- Default: off
-
- ALL/S Searches all subdirectories for the supplied
- pattern (see also: Pattern matching).
- Default: off
-
- NC=NOCROP/S Simply put: if you set NOCROP, your picture won't
- be cropped. It will be scaled, if necessary. If you
- supply also the display depth, this one will be used.
- If you didn't supply a depth, then after each scale-
- step the depth will be reconsidered, meaning: it
- choses the highest possible depth for the scaled
- picture (If this explanation confused you, try
- it out with VERBOSE set).
- Example: ShowJPEG 24BIT LargePicture.jpeg
- This LargePicture will be scaled until it fits a
- 24 bit resolution.
- Default: off
-
- Remark: the BEHIND-option has been dropped. There exists now a new
- feature:
- If you display more than one picture, the new screen is opened in
- front of the old one. This means no more switching back to WB
- resolution. This is similar to what ViewGIF does.
-
-
- Every combination of options is possible:
-
- ShowJPEG QUALITY BEST DF0:Pictures/Tron.jpeg
- ShowJPEG Q=FAST DH0:Art/MonaLisa.jpg
- ShowJPEG DF0:Pictures/Tron.jpg 24BIT
- ShowJPEG 8BIT DH0:Art/WindyDay.jpg DELAY 10 GREY VERBOSE
-
- From Workbench:
- ShowJPEG reads it's own tooltypes and takes them as its
- defaults. It reads the tooltypes of every picture and uses
- these options, but they are switched back for the next
- picture.
-
- Ctrl-C is now handled more correctly. You can break the whole
- program by typing Ctrl-C into the picture while it is being
- decoded. You can't break the program in the CLI !
- Since V1.5 you can now use Escape, too.
-
-
- The Quality setting
- -------------------
-
- For those of you who know the jpeg-software:
- - BEST means: Fancy upsampling
- if quantizing: two pass quantize, Floyd-Steinberg dithering
- - NORMAL means: normal upsampling
- one pass quantize, ordered dithering
- - FAST means: normal upsampling
- one pass quantize, no dithering
-
- In true/high color mode, the quality setting won't affect too much.
- But if the software has to reduce to 8 bits, the quality gain is very
- big: FAST is just a quick preview, NORMAL is not much slower but a quite
- good picture and BEST is what you could expect from any graphics
- software but is slow. (Anyway, BEST is ~3 times faster than ImageFX and
- gives similar results !)
- In BEST mode it (normally) uses a temporary file in T:, so don't set this
- to RAM: unless you have >2 Megs of free RAM.
-
-
- Pattern Matching
- ----------------
- (Note: * only works if you use WildStar or a similar program. Use #?
- instead)
-
- Since V1.3 pattern matching is implemented. As this is a complex matter
- and it's not really the same in every program, I describe it in this
- chapter.
- ShowJPEG splits your supplied pattern into two parts:
-
- ShowJPEG DF0:Pictures/*.jpg
- | Path || pattern \
-
- - The easy case: the path is not a pattern
- ShowJPEG just searches the pattern in the supplied path and displays
- every picture found.
- Example: ShowJPEG DF0:Pictures/*.jpg
- displays every picture in DF0:Pictures with .jpg at the end.
- ShowJPEG DF0:Pictures/A*
- displays every picture in DF0:Pictures starting with A or a.
-
- If you add 'ALL', the supplied path is taken as a starting point.
- Every subdirectory is now searched for the pattern.
- Example: ShowJPEG DF0:*.jpg ALL
- displays every picture in DF0: and its subdirectories with
- .jpg at the end.
-
- - The complex case: the path is a pattern
- ShowJPEG searches now every path that matches the path pattern for
- the file pattern.
- The same with 'ALL', but now every subdirectory is searched too.
- Example: ShowJPEG DH0:G*/A*.jpg
- displays every picture in DH0:Graphics, DH0:Games ...
- that matches A*.jpg (A at the beginning and .jpg at the end)
- ShowJPEG DH0:G*/A*.jpg
- displays every picture in all subdirectories of DH0:Graphics,
- DH0:Games ... that matches A*.jpg
- ShowJPEG DH0:G*/*.jpg
- displays every .jpg picture in every subdirectory of
- every directory starting with DH0:G (this can be a lot !)
-
-
- Of course, every standard pattern matching characters can be used:
- ? Matches any single character
- # Matches zero or more of the following character
- | Separates OR clauses
- * Matches any number of arbitrary characters (only with WildStar)
-
- Examples:
- - *.jpg matches Tron.jpg, Picture.jpg
- - #a.jpg matches .jpg, a.jpg, aa.jpg, aaa.jpg ...
- - A* matches Ape.jpg, a.jpg, Amiga.jpg (but also: Amiga.jpg.info !)
- - a(b|c).jpg matches ab.jpg and ac.jpg
-
- Pattern matching is NOT case sensitive.
-
-
- Requirements
- ------------
-
- Kick 2.0 and vilintuisup.library version > 2.0.
-
-
- Bugs
- ----
-
- - Some people reported to me that they couldn't load pictures from
- CD-ROM. I have no idea why this happens. Any suggestions ?
-
- I tested the program with various JPEG-pictures and with Enforcer on my
- A3000. No misbehaviour could be found. But on different computer-systems
- with different environments, nobodoy knows what's gonna happen...
- If you find a bug, please report it to me together with as much information
- as possible that could help me to fix it: your computer, configuration, kick
- version and so on.
-
-
- Thanks
- ------
-
- My thanks go to:
-
- - VillageTronic for their wonderful card
- - the developers of the GNU-C-compiler and libnix
- - the Independent JPEG Group for their software
-
-
- Future plans
- ------------
-
- - ??
-
- Tell me if you want to have more options !
-
-
- Revisions
- ---------
-
- 1.0 - first public release
-
- 1.1 - Added NOCENTER
- Remark: different default behaviour, it displays
- now a picture in the center of the screen
- (requested by Stefan Hülswitt)
-
- 1.2 - Added Filerequester
- When no picture could be loaded, a file requester
- pops up
-
- 1.3 - Added Pattern matching
- Handles Ctrl-C better
-
- 1.4 - Added NOCROP option, rewrote OpenScreen code
- (requested by Stefan Huelswitt and Antti Miettinen)
- Corrected small bug (grey picture handling)
- Compiled with gcc 2.6.3
- Linked with jpeg library 5a and libnix 0.7
-
- 1.5 - Escape behaves now like Ctrl-C
- Added BEHIND option (requested by Henning Sauer)
-
- 1.6 - WB message window now waits for close button
- Removed BEHIND option in favor of a new
- screen handling
- New OpenScreen code
- Linked with jpeg library 5b and libnix 0.8
-
-
-
- Address
- -------
-
- I can be reached at
-
- Roman Hiestand
- Luziaweg 15
- CH-8807 Freienbach
- Switzerland
-
- Fax: CH-055/48 26 37
-
- email: rhiestan@iiic.ethz.ch
-