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- ===========================================================
- Convert.doc - for v1r6 - last updated November 15th, 1990
- ===========================================================
-
- Credits:
- --------
- Software created by Pete Patterson for Black Belt Systems
- Additional coding by Ben Williams
- Documentation written by Ben Williams
- Funding by Black Belt Systems
- Project: HAM-E hardware support
-
- Program revisions from version 1.0 to date:
- ===========================================
- v1r6 - Fixed bug causing crashes if memory allocation failed
- - Intergerized scaling for approximately 7x speed improvement
-
- v1r5 - Fixed bug in loading 24 bit files that appeared in v1r4
- - Added load of IBM (yech!) Dpaint "LBM" files
- - Added load of IBM DPaint non-LBM files (recent DPaint versions)
- - Added "shuffle" features to convert from and to X-Spex
- compatible 3-d interleaved images
-
- v1r4 - Added support for 18 bit IFF "ScanLab" files
- - Added Support for Black Belt paint UPB8 (UnPackedBrush-8) brushes
-
- v1r3 - Added HAM-E ham and reg mode single and multi field loaders
-
- v1r2 - Added ability to read one type of targa file ("Opticks" generated)
-
- v1r1 - Fixed bug in loading RGB8 and RGN files in v1r0
- - Added scaling options (-px, -py, -%x, -%y)
-
- v1r0 - Initial release version.
-
- Introduction:
- -------------
- The convert tool was created to fill a specific need of the Black Belt
- Systems HAM-E product customer base. The HAM-E is a graphics device
- which can display color information far more accurately than the Amigas
- built in graphics capabilities allow. As such, the HAM-E display
- formatting software takes as input CBM standard 24 bit IFF files, the
- format defined by CBM specifically for this type of use.
-
- Unfortunately, many otherwise powerful Amiga products such as Impulses
- Turbo Silver, Byte by Bytes Sculpt series and some of the PD ray trace
- products don't save standard files; instead, they save raw files,
- or partially (sometimes totally!) non-conformant "other" formats, some
- of which they consider proprietary.
-
- Certain other software products often save image formats that are
- designed to take advantage of various features in the Amiga's graphics
- system that allow enhancement of certain image modes. HAM-E, SHAM and
- Dynamic HiRes are examples of this type of image file. ASDGs "The Art
- Department" saves 24 bit files with special chunks in them called
- "CLUT" chunks that modify the 24 bit data in various ways. All of these
- differing image file formats bring chaos to our supposedly orderly
- "standard image format" environment.
-
- The convert tool is able to read many of these file formats, optionally
- scale the input file to a new size for output, and write it out as a
- completely standard, "100% vanilla" 24 bit IFF file as per the CBM
- specification. Once this is done, the resulting file can be sent to the
- HAM-E render software, or any other Amiga tool that can read 24 bit IFF.
-
- The convert tool has been made available free of charge to our
- customers as a service to them. Use by other parties is allowable as
- well.
-
- Use of Convert:
- ---------------
- There are basically two types of image files that convert supports.
- First, we have "unified" image files. These are files where all of the
- iamge information is contained in one file, with enough other
- information to allow the convert tool to identify the file type and
- then act accordingly. The other is "raw" individual RGB files, where
- three individual files make up the complete image; and there is no
- information in these files to help the tool know what the file type is,
- or what its resolution is, and so on.
-
- Unified Image File Use:
- -----------------------
- This consists of simply specifying an input and an output file:
-
- 1> convert -i input_file -o output_file
-
- This will take the input file and create a 24 bit IFF output file of
- the same resolution. The filenames may be presented in any order, as
- long as they are preceeded by the "-i" and "-o" switches. Note that for
- Targa format files, you must specify the -t flag anywhere on the command
- line. The width and height of the image is stored within the Targa file,
- but there is nothing in a Targa format file which identifies it as such.
-
- Raw Image File Use:
- -------------------
- For any raw RGB file triplet, the "-i" option is not used. Instead,
- there are five (5) required command line switches that tell the convert
- software how to deal with this image. You must provide the names of
- each of the three raw files, as well as the horizontal and vertical
- resolution of the image contained in these files. Here is an example:
-
- 1> convert -r file1 -g file2 -b file3 -x 320 -y 400 -o output_file
-
- The parameters may be presented in any order, as long as all five of
- the -o, -r, -g, -b, -x, and -y switches are present.
-
- Optional Output Scaling:
- ------------------------
- For either unified file types or raw RGB files, you have the option to
- scale the output file. You can do this as a percentage of input size,
- or to specific X:Y output requirements, or a mixture of both
- techniques. For the examples we'll use the unified form of the command
- since it's shorter and a little easier to understand; but these scaling
- options may also be applied in exactly the same way to raw RGB file
- conversion operations. Here are some examples:
-
- 1> convert -i infile -o outfile -%x 50
-
- This will scale the X axis to 50% of the original size. Since there is
- no scale specification for the Y axis, it will remain the original
- size.
-
- If you need to scale both axis to 50%, then you specify that for both:
-
- 1> convert -i infile -o outfile -%x 50 -%y 50
-
- You can specify the output size directly in pixels, as well. The
- following example will create a 320x400 output, regardless of the size
- of the input file:
-
- 1> convert -i infile -o outfile -px 320 -py 400
-
- And this will scale the x axis to 50% of it's original size while
- ensuring a 200 line vertical size:
-
- 1> convert -i infile -o outfile -%x 50 -py 200
-
- You can mix and match percent and specific X and Y options as needed;
- don't use a percentage and a specific pixel specification for the same
- axis.
-
- The scaling options also allow enlargement. For percentages, just
- specify values greater than 100; for pixel sizes, if the output size is
- larger than the input file size, then the output file will be enlarged
- in that dimension or dimensions. Here's an example:
-
- 1> convert -i infile -o outfile -%x 200 -%y 200
-
- Unified Image File Formats Supported:
- -------------------------------------
- 1 - 2 color IFF images
- 2 - 4 color IFF images
- 3 - 8 color IFF images
- 4 - 16 color IFF images
- 5 - 32 color IFF images
- 6 - 64 color "half-bright" IFF images
- 7 - 64 color HAM-E register mode single field images
- 8 - 64 color HAM-E register mode dual field images
- 9 - 128 color HAM-E register mode single field images
- 10 - 128 color HAM-E register mode dual field images
- 11 - 128 color IFF images
- 12 - 192 color HAM-E register mode single field images
- 13 - 192 color HAM-E register mode dual field images
- 14 - 256 color IFF images
- 15 - 256 color GIF images
- 16 - 256 color HAM-E register mode single field images
- 17 - 256 color HAM-E register mode dual field images
- 18 - 256 color HAM-E UPB8 brushes
- 19 - 4096 color photon paint IFF images
- 20 - 4096 color photon paint IFF brushes
- 21 - 4096 color DigiPaint IFF images
- 22 - 4096 color DigiPaint IFF brushes
- 23 - 4096 color Dynamic HiRes images
- 24 - 4096 color ARZ0 images ("TAD")
- 25 - 4096 color ARZ1 images ("TAD")
- 26 - 4096 color AHAM images ("TAD")
- 27 - 4096 color SHAM images ("info")
- 28 - 4096 color RGBN images ("Silver")
- 29 - 262144 color HAM-E ham mode single field images
- 30 - 262144 color HAM-E ham mode single field, multi-bank images
- 31 - 262144 color HAM-E ham mode dual field images
- 32 - 262144 color HAM-E ham mode dual field, multi-bank images
- 33 - 262144 color "ScanLab" 18 bit IFF files
- 34 - 16 million color RGB8 ("Silver")
- 35 - 16 million color 24-bit IFF images with CLUT chunks ("TAD")
- 36 - 16 million color 24-bit IFF images
- 37 - 16 million color QRT Trace files
- 38 - 16 million color DKB Trace files
- 39 - 16 million color TARGA files (Opticks)
-
- Available Command Line Switches:
- ================================
-
- For Help
- --------
- ? ...for list of options
- h ...for list of options
- -h ...for list of options
- help ...for list of options
-
- For Specifying a Unified Input File:
- ------------------------------------
- -i [dev:dir/file] ...unified input file (may include path)
-
- For Specifying Targa Input:
- ---------------------------
- -t ...use -i for Targa file name
-
- For Specifying raw RGB Input Files (All these switches are required):
- ---------------------------------------------------------------------
- -r [dev:dir/file] ...raw red file (may include path)
- -g [dev:dir/file] ...raw green file (may include path)
- -b [dev:dir/file] ...raw blue file (may include path)
- -x [width] ...raw source width
- -y [height] ...raw source height
-
- For Specifying the Output File (Required):
- ------------------------------------------
- -o [dev:dir/file] ...24 bit output file (may include path)
-
- For Scaling the output file to a percentage of the input file:
- --------------------------------------------------------------
- -%x [% value] ...destination image width
- -%y [% value] ...destination image height
-
- For Scaling the output file to a specific Pixel Width:
- ------------------------------------------------------
- -px [pixel value] ...destination image width
- -py [pixel value] ...destination image height
-
- To change an "over-under" X_Spex image to "Interleaved":
- --------------------------------------------------------
- -3d ...takes over-under, makes interleaved
-
- To change an "Interleaved" X_Spex image to "over-under":
- --------------------------------------------------------
- -2d ...takes interleaved, makes over-under
-
-