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jedioutcast/utils/roq2/libim/imfmt.c
James Monroe b2f9cf6f08 Jedi Outcast v056
2013-04-04 13:07:40 -05:00

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/**
** $Header: /roq/libim/imfmt.c 1 11/02/99 4:38p Zaphod $
** Copyright (c) 1989-1995 San Diego Supercomputer Center (SDSC)
** a division of General Atomics, San Diego, California, USA
**
** Users and possessors of this source code are hereby granted a
** nonexclusive, royalty-free copyright and design patent license to
** use this code in individual software. License is not granted for
** commercial resale, in whole or in part, without prior written
** permission from SDSC. This source is provided "AS IS" without express
** or implied warranty of any kind.
**
** For further information contact:
** E-Mail: info@sds.sdsc.edu
**
** Surface Mail: Information Center
** San Diego Supercomputer Center
** P.O. Box 85608
** San Diego, CA 92138-5608
** (619) 534-5000
**/
#define HEADER " $Header: /roq/libim/imfmt.c 1 11/02/99 4:38p Zaphod $"
/**
** FILE
** imfmt.c - master file format table for the image library
**
** PROJECT
** libim - SDSC image manipulation library
**
** DESCRIPTION
** imfmt.c contains the master file format table for the image
** library. The table lists all of the image file formats supported.
**
** PUBLIC CONTENTS
** d =defined constant
** f =function
** m =defined macro
** t =typedef/struct/union
** v =variable
** ? =other
**
** ImGetFileFormats f Get the master list of formats.
**
** PRIVATE CONTENTS
**
** imFileFormats v list of file format information
**
** None
**
** HISTORY
** $Log: /roq/libim/imfmt.c $
*
* 1 11/02/99 4:38p Zaphod
** Revision 1.14 1995/06/29 00:28:04 bduggan
** updated copyright year
**
** Revision 1.13 1995/06/16 08:41:13 bduggan
** Made ImFileFormats static, and added a function which returns the list.
** The reason for this is that when making a shared object on the sun,
** all global variables must be in a seperate file. It's easier just
** to make this global variable static, and have a global function.
** (Sorry -- that's inaccurate. Not ALL global variable must be in
** a seperate file. All the global variables which are used by the tools
** need to be in a seperate file.)
**
** Revision 1.12 1995/05/17 23:43:43 bduggan
** added miff, xpm
** Merged rpbm, rpnm, rppm, ppm, pnm, pbm
**
** Revision 1.11 1995/02/16 21:40:00 bduggan
** Jpegs
**
** Revision 1.10 1994/10/03 11:29:36 nadeau
** Updated to ANSI C and C++ compatibility.
** Removed all use of register keyword.
** Minimized use of custom SDSC types (e.g., uchar vs. unsigned char)
** Changed all float arguments to double.
** Added forward declarations.
** Added misc. casts to passify SGI and DEC compilers.
** Changed all macros and defined constants to have names
** starting with IM.
** Updated comments.
** Updated indenting on some code.
** Updated copyright message.
**
** Revision 1.9 92/11/04 12:00:19 groening
** took the ImFileFormat info and put
** them in their corresponding image files.
**
** Revision 1.8 92/09/17 14:38:16 vle
** Added BMP, CUR, and ICO formats. Re-ordered some declarations.
** Updated copyright notice.
**
** Revision 1.7 92/06/18 16:01:17 groening
** targa and viff formats added
**
** Revision 1.6 92/04/07 15:32:43 vle
** Re-ordered the format specifications for IRIS Rgb to be consistent
** with rest of imfmt.c.
**
** Revision 1.5 92/04/03 18:13:52 vle
** imconv can no longer output an xwd image without a colortable.
** Added lines to allow imconv to support 8-bit image read and
** writes and changed read/write function names to be consistent
** with rest of code.
**
** Revision 1.4 91/10/03 09:01:29 nadeau
** Changed 'interlace' to 'interleave'. Commented out CGM
** support. Added EPS, ICON, and PCX support. Changed
** PBM and RPBM entries to be multiple entries, one per
** format variant. Updated support for XWD and RAS. Changed
** comments for HDF, PS, PIC, and others (cosmetic changes).
**
** Revision 1.3 91/03/13 12:49:57 nadeau
** Fixed various can/can't handle pipe setting bugs.
** Reordered RGB alpha compression write preferences for TIFF.
**
** Revision 1.2 91/03/12 11:02:12 nadeau
** Changed pic support to allow pipe read and write.
**
** Revision 1.1 91/03/08 14:39:30 nadeau
** Initial revision
**
**/
#include "iminternal.h"
/**
** TABLES AND INITIALIZATIONS
** imFileFormats - master file format table
**
** CODE CREDITS
** Custom development, Dave Nadeau, San Diego Supercomputer Center, 1991.
**
** DESCRIPTION
** The SDSC Image Tools' file format handling is driven by a master table
** listing the supported image file formats, their attributes, and the
** functions to call to read and write data in that format. That master
** table is "imFileFormats" declared and initialized here in this file.
**
** File formats are read and written by format "handlers": C functions
** found in separate files in this package. For instance, all of the
** handlers for the Sun Rasterfile format are found in "imras.c".
**
** Each format handler file also declares and initializes a set of
** structures and arrays that serve to describe that format. These
** structures give the name of the format, alternative names, details
** on what types of data might be found in the file, what variants the
** handlers can read and write, the magic numbers characteristic of that
** format, and so on. All of this is contained within a struct of type
** "ImFileFormat". The master imFileFormats array declared here, in this
** file, is just an array of pointers to these individual file format
** handler descriptions. The format descriptions themselves are in the
** same source file as the handler routines for that format, such as
** "imras.c" for Sun Rasterfiles.
**
** ADDING A NEW FILE FORMAT
** The SDSC Image Tools are highly configurable to support new file
** formats. Adding a format is largely a matter of adding an additional
** initialization to the imFileFormats array. Thereafter all of the
** SDSC Image Tools will automatically support that new format (after
** relinking) without any change to their code.
**
** Here's a brief outline of the steps to go through to add a new file
** format. We'll go into greater detail on each of these steps later in
** this comment block.
**
** 1. Write the read and write routines.
**
** 2. Declare and initialize the ImFileFormat struct and it's
** associated sub-structures.
**
** 3. Add an "extern" statement to this file to pull in your
** new file format's ImFileFormat struct. It's good practice
** to also add a #define name and #ifdef's around that extern
** statement (see below).
**
** 4. Add an initialization to the imFileFormats array to point
** to your file format's ImFileFormat struct.
**
** PLEASE! Add new entries in alphabetical order, sorted
** by the first file extension name of the format. This
** will insure that printed file format lists, such as by
** the "imformats" tool, will look good.
**
** 5. Update the Makefile, build the library and relink the tools.
**
** WRITING THE READ ROUTINE
** Every format has one top-level read routine called by ImFileRead( )
** when the user requests that format. Typically, read routines are
** named with the convention of starting with "im" followed by the format's
** name, followed by "Read". So, for instance, the Sun Rasterfile read
** routine is named "imRasRead".
**
** The read routine should be declared as "static" (private) to the
** handler source file. There is no need for it to be called directly
** from outside the handler file. It will, instead, be called via a
** function pointer that you place into your handler's "ImFileFormat"
** struct.
**
** A handler read routine is called with the following arguments:
**
** int ioType
** The type of file descriptor or pointer on which to
** do I/O. The user's calls to either ImFileRead (with
** a file descriptor) or ImFileFRead (with a file pointer)
** both vector down into the same handler read function.
** Read functions should do if's on the ioType to see
** which kind of file I/O to do.
**
** int fd
** The file descriptor if (ioType & IMFILEIOFD) is true.
**
** FILE *fp
** The file pointer if (ioType & IMFILEIOFP) is true.
**
** TagTable *flagsTable
** A table of flags that the user has supplied to steer
** the read operation. Global flags that set up error
** message redirection, and so on, have already been
** extracted and handled. In general, read handlers
** need not check the flagsTable.
**
** TagTable *tagTable
** The table into which to put any data read from the
** file.
**
** The read handler should direct all file I/O through the SDSC Binary
** I/O Library to insure maximum portability among hardware architectures
** with different byte orders, word sizes, floating point formats, and
** structure padding. Please see the SDSC Binary I/O man pages for
** details.
**
** Images read from the file should be placed into ImVfb's allocated via
** ImVfbAlloc( ). Please see the ImVfbAlloc( ) man page for details and
** pointers to other relevant man pages.
**
** Color tables read from the file should be placed into ImClt's allocated
** via ImCltAlloc( ). Please see the ImCltAlloc( ) man page for details
** and pointers to other relevant man pages.
**
** Data from the file should be appended to the tagTable using
** TagTableAppend( ) in the SDSC TagTable Library. Please see the
** TagTableAppend( ) man page for details.
**
** When everything else is done, the read handler should return a -1 on
** an error (and set ImErrNo to an appropriate error code), or a positive
** constant counting the number of things added to the tagTable.
**
** Error messages should always be output using one of three macros:
**
** ImErrorInfo( message, return_code, errno )
** ImErrorWarning( message, return_code, errno )
** ImErrorFatal( message, return_code, errno )
**
** ImErrorInfo( ) messages are for information purposes only. These
** are typically general info about what has been found in the file.
** Command-line tools often block such output unless the -verbose option
** has been given.
**
** ImErrorWarning( ) messages are to warn of possible problems in reading
** the file. Warnings are for recoverable problems. Command-line tools
** typically print these to stderr.
**
** ImErrorFatal( ) messages are to alert to a fatal reading problem and
** are not recoverable. Command-line tools typically print these to
** stderr.
**
** Each of these three macros covers up a set of if-statements that
** select printing the message to a user-supplied stream, calling a
** user-supplied callback, or skipping the message entirely. If a
** callback is called, the callback may return a flag indicating that
** the read routine is to abort (imagine an X dialog box with a user
** choice for "continue" or "abort"). If the callback says to abort,
** the macro will automatically exit the read handler routine, returning
** the given "return_code" and setting ImErrNo to the given "errno".
** Please note: ImErrorFatal( ) ALWAYS exits the read routine,
** regardless of the callback's return value.
**
** WRITING THE WRITE ROUTINES
** Every format has one or more write routines. When the user calls
** ImFileWrite( ), that function scans the list of supported output
** image types described in the format's write map (see below) and
** calls the write function appropriate for the given VFB. So, typically
** there is one write routine for each VFB type that can be written to
** the output file.
**
** Write handler's have the same call arguments as read handlers, with
** one extra argument at the front of the list:
**
** ImFileFormatWriteMap *pMap
** While the write map is described in more detail below,
** the gist of it is that each file format has an array
** of structs called a "write map". Each array entry
** describes a VFB type that can be written to that
** format. Each array entry also has a pointer to a
** write function to do the writing of that VFB type.
** When that write function is called, the "pMap"
** argument is set to point to that array entry.
**
** In general, write handlers can ignore the pMap
** argument.
**
** int ioType
** int fd
** FILE *fp
** TagTable *flagsTable
** TagTable *tagTable
**
** Most of the flags in the flagsTable have already been processed by
** ImFileWrite( ) and used to decide which write handler function to call.
** Most write handlers can ignore the flagsTable.
**
** Data written to the output file should be pulled directly from the
** tagTable and should be written in the order in which it appears in
** the tagTable.
**
** All file I/O should be done through the SDSC Binary I/O library in
** order to insure maximum portability.
**
** Info, warning, and fatal error messages should be printed using the
** same set of macros as described above for read handlers.
**
** When the write handler is complete, it should return a -1 if an error
** occurred (and set ImErrNo to an appropriate error code), or a positive
** integer indiciating the number of tags in the tagTable that were
** used.
**
** MAPPING TABLE INITIALIZATIONS
** The mapping tables tell the generic portions of the library what the
** various formats are capable of handling. This lets the higher-level
** code return errors to the user if, say, the user wants to write a
** JPEG-compressed image to a GIF file, which can't do JPEG compression.
** At the same time it lets that higher-level code convert images to
** different pixel depths if necessary *before* handing them to the
** write handler. This means that if the user asks to write a 24-bit RGB
** image to a GIF file, which can't do 24-bit images, the higher-level
** code will automatically drop it down to 8-bit before calling the write
** handler.
**
** Read Mapping
** The read mapping table is primarily informational. Very little code
** uses it except for nice printouts.
**
** The read map table is an array of structures, each one describing one
** type of data that might be found in the file format. One entry might,
** for instance, say the format can support an 8-bit pseudo-color image
** with a color table. The next entry might say the same format could
** instead have a 24-bit RGB image. And the third entry might say the
** format could have a 24-bit RGB image with an alpha channel. Each
** variant gets it's own struct in the array and it's own initialization.
**
** Structure initializations are divided into columns (one column per
** struct field).
**
** Columns 1-3 describe the image storage of the incomming image. The
** first is a type indicator (color index or RGB). The second is the
** number of channels of data (usually 1 or 3). The third is the size,
** in bits, of each channel (usually 1 or 8). Do not include the
** alpha channel (if any) in the depth. That info goes in Column 4.
**
** Example: IN,1,8 -- 8-bit index
** RGB,3,8 -- 3*8-bit = 24-bit RGB
**
** Column 4 is a mask of attributes for the incomming image. The
** mask indicates if a CLT or alpha plane is included, how images
** are interleaved (RGB only), and what compression scheme is used.
**
** Example: 0 -- nothing
** C -- has CLT
** C|A -- has CLT and alpha
** A|RLE|PI -- plane interleaved RLE & alpha
**
** Column 5 is the VFB type of the resulting image. Do not include
** IMVFBALPHA if an alpha plane is present. That info goes in Column 6.
**
** Example: IMVFBINDEX8 -- 8-bit index
** IMVFBRGB -- RGB
**
** Column 6 is a mask of attributes for the VFB. The mask indicates if
** a CLT or alpha plane is included. Interleave and compression codes
** are inappropriate for this column.
**
** Example: 0 -- no clt or alpha
** C|A -- clt and alpha
**
** For example: a mythical format "Xyz" supports 8-bit color index and
** 24-bit true-color RGB images. 8-bit images always have a CLT. RGB
** images never do. RGB images may be uninterleaved, or plane interleaved.
** And finally, the image could be uncompressed, or run-length encoded
** (RLE).
**
** static ImFileFormatReadMap imXyzReadMap[ ] =
** {
** { IN,1,8, RLE | C, IMVFBINDEX8, C },
** { IN,1,8, C, IMVFBINDEX8, C },
** { RGB,3,8, RLE | PI, IMVFBRGB, 0 },
** { RGB,3,8, PI, IMVFBRGB, 0 },
** { RGB,3,8, RLE, IMVFBRGB, 0 },
** { RGB,3,8, 0, IMVFBRGB, 0 },
** { -1, 0, -1, 0 },
** };
**
** Always end the list with a -1 depth entry.
**
** 8-bit index occurs twice in this example, once with "RLE" Or-ed into
** the incomming attribute mask, and once without. If no compression
** flag is Or-ed in, it is assumed to mean uncompressed.
**
** 24-bit RGB occurs four times: twice with "RLE", and twice without.
** For each of the RLE cases, one has "PI" for "Plane Interleave"
** Or-ed in, and one doesn't. Likewise with the non-"RLE" cases.
**
** The "C", "PI", "RLE", and so on flags are short-cut #define's found
** in iminternal.h. They include:
**
** C - CLT is included
** A - Alpha plane is included
**
** LI - Line interleaved RGB
** PI - Plane interleaved RGB
**
** RLE - Run-length encoded
** LZW - Lempel-Ziv & Welsh compressed
** PB - Macintosh PackBits
** DCT - Descrete Cosine Transform compression
**
** IN - Index type image
** RGB - RGB type image
**
** If C is not present, it is assumed there is no CLT.
**
** If A is not present, it is assumed there is no alpha plane.
**
** If neither LI or PI are present, it is assumed that the image
** is not interleaved.
**
** If none of RLE, LZW, PB, or DCT are present, it is assumed that the
** image is uncompressed.
**
** Write Mapping
** The write mapping table is critical. It is used by the ImFileWrite( )
** code to convert the VFB to be written in to something the format can
** write. Depth's are changed. CLT's are added. And so on. The
** table is also used to make nice printouts.
**
** As with the read map, the write map is really an array of structs
** initialized in the handler's source file. That initialization takes
** the form of a series of rows and columns of data. Each row describes
** one output variant supported. The column meanings are described below:
**
** Column 1 is the incomming VFB type. Do not include IMVFBALPHA if an
** alpha plane is to be present. That info goes in column 2.
**
** Example: IMVFBINDEX8 -- 8-bit index
** IMVFBRGB -- RGB
** IMVFBMONO -- monochrome index
**
** Column 2 is a mask of required attributes for the incomming VFB. The
** mask indicates if a CLT or alpha plane must be present. Interleave
** and compression scheme codes are inappropriate for this column.
**
** Example: 0 -- neither clt or alpha
** C|A -- clt and alpha
**
** Columns 3-5 are the image type and depth attributes of the outgoing
** (in the file) image. This includes the type (index or RGB), number
** of channels (usually 1 or 3), and number of bits per channel (usually
** 1 or 8). Do not include an alpha channel in the depth. That goes
** in column 6.
**
** Example: IN,1,8 -- 8-bit index
** RGB,3,8 -- 3*8-bit = 24-bit RGB
**
** Column 6 is a mask of resulting attributes for the outgoing image.
** The mask indicates if a CLT or alpha plane is included, how images
** are interleaved (RGB only), and what compression scheme is used.
**
** Example: 0 -- no clt, no alpha, ...
** C|A|RLE -- clt + alpha + RLE compress
** A|LI -- alpha + line interleaved
**
** Column 7 is an integer function pointer to the function to do the
** writing of that variant of the format. This is one of the write
** handlers for the format.
**
** For example: the same mythical "Xyz" format used for the read map
** example is used.
**
** private ImFileFormatWriteMap imXyzWriteMap[ ] =
** {
** { IMVFBINDEX8, 0, IN,1,8, RLE | C, ImXyzWrite8_RLE_C},
** { IMVFBINDEX8, C, IN,1,8, RLE | C, ImXyzWrite8_RLE_C},
** { IMVFBINDEX8, 0, IN,1,8, C, ImXyzWrite8_C },
** { IMVFBINDEX8, C, IN,1,8, C, ImXyzWrite8_C },
**
** { IMVFBRGB, 0, RGB,3,8, RLE | PI,ImXyzWriteRGB_RLE_PI },
** { IMVFBRGB, 0, RGB,3,8, RLE, ImXyzWriteRGB_RLE },
** { IMVFBRGB, 0, RGB,3,8, PI, ImXyzWriteRGB_PI},
** { IMVFBRGB, 0, RGB,3,8, 0, ImXyzWriteRGB },
** { -1, 0, -1, 0, NULL },
** };
**
** Always end the list with a -1 VFB type entry.
**
** When multiple entries are made for the same VFB type and incomming
** attributes, list from "best" to "worst". List compressed versions
** before uncompressed. List plane and line interleaved RGB before
** uninterleaved. List non-alpha versions before alpha, and so on.
**
** In this example, 8-bit VFB's occur four times: twice for RLE output
** encoding, and twice without. Within each of those, one occurrence
** requires no CLT, and one requires one. However, both of those cases
** go to the same routine (which presumably checks if the VFB has a CLT,
** and if not creates one).
**
** 24-bit RGB VFB's occur four times: twice for RLE output encoding,
** and twice without. Within each of those, one occurrence is
** uninterleaved, and one plane interleaved.
**
** There may not be two identical lines in the table. However, any number
** of lines may use the same input conditions and/or the same write
** function.
**
** ImFileWrite() checks this table and the flagsTable giving the user's
** write request flags, and decides which write function to call. If
** it can't find one that matches the request, and it can't convert the
** VFB into one that matches, then it returns an error to the user without
** every calling any format handler function.
**
** MAGIC NUMBERS
** Magic numbers are a UNIX trick to help in identifying the type of data
** found in a file. The typically just amount to 2 to 4 bytes at the
** start of the file that are a kind of signature for that type of data.
** A Sun Rasterfile, for instance, starts with 0x59, 0xA6, 0x6A, 0x95.
** An SGI RGB file starts with 0x01, 0xDA. And so on.
**
** Not all format types have magic numbers, but many do. The SDSC Image
** Tools use magic numbers to help figure out what type of file format
** is being used by an incomming image file. Based upon that we can
** figure out which format handler to call to read it in.
**
** Magic numbers are described an array of ImFileMagic structs declared
** and initialized within the format handler's source file. Each array
** entry describes one possible magic number for that format. Formats
** with multiple possible magic numbers (such as the PBM+ format) will
** list multiple numbers.
**
** Each array entry gives the file byte offset at which a magic number
** can be found (usually 0), the number of bytes in the magic number
** (usually 2 or 4), and a pointer to an unsigned char array of those
** bytes. For example, here is the set of declarations for the magic
** number of the Microsoft Windows Cursor file format:
**
** static unsigned char imCurMagicNumber[ ] =
** { 0x00, 0x00, 0x02, 0x00 };
** static ImFileMagic imCurMagic[ ] =
** {
** { 0, 4, imCurMagicNumber },
** { 0, 0, NULL }
** };
**
** The magic number initialization is always terminated with a
** { 0, 0, NULL } entry.
**
** If the format has no magic number, then the array should be initialized
** to just one { 0, 0, NULL }.
**
** FORMAT NAMES
** Most image file formats have multiple common names by which they are
** known. The Sun Rasterfile format, for instance, is known by at
** least the following names and common file name extensions:
**
** ras, sun, sr, scr
**
** The PBM+ files are known by:
**
** pbm, pgm, ppm, pnm, rpbm, rpgm, rppm, rpnm
**
** And so on. Users of the SDSC Image Tools are able to use any of
** these file format names, and filename extensions, when refering to
** the format. Writers of new file format handlers need to list those
** names so that the higher-level code can recognize them. Such a list
** is simply an initialized array of char *'s. The following, for
** instance, is the array initialization for the Sun Rasterfile handlers:
**
** static char *imRasNames[ ] =
** { "ras", "sun", "sr", "scr", NULL };
**
** Note that the list must end with a NULL pointer.
**
** The first entry in the array has special significance and is usually
** considered the primary name for the format.
**
** THE IMFILEFORMAT INITIALIZATION
** Every file format has one, globally accessible, ImFileFormat struct
** and it's initialization. It is a pointer to that struct that is
** placed into the imFileFormats array initialization found here in this
** file. This one ImFileFormat struct for the format describes
** everything we need to know about the format.
**
** The ImFileFormat struct has a number of fields as follows:
**
** format_names
** The name of the format names array discussed earlier.
** This array lists the various names by which the
** file format is known.
**
** format_help
** This is a character string giving the long form of
** the file format's name. For instance, Adobe EPS
** file format says: "Encapsulated PostScript file".
** This string is used in format listings and help lists.
**
** format_creator
** This is a character string giving the name of the
** creator of the file format (not the programmer of
** this code!). So, for Adobe EPS, the creator string
** says: "Adobe". This info is used in format listings.
**
** format_readSupport
** This is a one or more line character string describing
** in human-readable terms what variants of the file
** format can be read by the handler. This should closely
** mimic what is found in the handler's read map, but be
** more friendly to read. This info is used in format
** listings.
**
** format_writeSupport
** This is a one or more line character string describing
** in human-readable terms what variants of the file
** format can be written by the handler. This should
** closely mimic what is found in the handler's write
** map, but be more friendly to read. This info is used
** in format listings.
**
** format_magicMap
** This is initialized to a pointer to the magic number
** array discussed earlier. This array lists the
** various magic numbers for the file format.
**
** format_readMultiVfb
** Can the read handler read multiple images from the
** same file? This depends upon the abilities of the
** file format. If so, initialize this to IMMULTI. If
** not, initialize this to IMNOMULTI.
**
** format_readPipe
** Can the read handler read from a pipe? If the handler
** doesn't do any seeks, the answer is IMPIPE. Otherwise
** the answer is IMNOPIPE. For IMNOPIPE formats, the
** higher-level code will automatically stage things to
** an intermediate file and hand that file to the read
** handler instead of the original pipe.
**
** format_writeMultiVfb
** Can the write handler write multiple images to the
** same file? This depends upon the abilities of the
** file format. If so, initialize this flag to IMMULTI.
** Otherwise initialize it to IMNOMULTI.
**
** format_writePipe
** Can the write handler write to a pipe? If the handler
** doesn't do any seeks, the answer is IMPIPE. Otherwise
** the answer is IMNOPIPE and the higher-level code will
** automatically stage to a temp file rather than giving
** the pipe to the write handler.
**
** format_read
** This is initialized to the handler's read function.
**
** format_readMap
** This is initialized to a pointer to the read map
** array discussed earlier.
**
** format_writeMap
** This is initialized to a pointer to the write map
** array discussed earlier.
**
** For example, here's the ImFileFormat array structure declaration
** and initialization for the Compuserve GIF format:
**
** ImFileFormat ImFileGifFormat =
** {
** imGifNames, "Graphics Image File",
** "Compuserve",
** "1- thru 8-bit color index Lempel-Ziv & Welsh-compressed files",
** "1 and 8-bit color index Lempel-Ziv & Welsh-compressed files",
** imGifMagic,
** IMNOMULTI, IMNOPIPE,
** IMNOMULTI, IMNOPIPE,
** imGifRead, imGifReadMap, imGifWriteMap,
** };
**/
/*
* FORMATS
* These #define's enable inclusion of the initialization for that
* format into the imFileFormats table.
*
* It is considered good style to define one of these for every file
* format added. It is not, however, required. These names are only
* known within the scope of this file.
*/
#define bmp
#define cur
#define eps
#define gif
#define hdf
#define ico
#define icon
#define iff
#define jpeg
#define miff
#define mpnt
#define pbm
#define pcx
#define pic
#define pict
#define pix
#define ras
#define rgb
#define rla
#define rle
#define softimage
#define synu
#define tga
#define tiff
#define viff
#define x
#define xbm
#define xpm
#define xwd
/*
* FUNCTION DECLARATIONS
* ImFile***Format - external file format description structures
*
* It is considered good style to put an #ifdef around each extern
* statement so that sites that don't want all of these formats installed
* can block one or more of them.
*/
#ifdef bmp
extern ImFileFormat ImFileBmpFormat;
#endif /* bmp */
#ifdef cur
extern ImFileFormat ImFileCurFormat;
#endif /* cur */
#ifdef eps
extern ImFileFormat ImFileEpsFormat;
#endif /* eps */
#ifdef gif
extern ImFileFormat ImFileGifFormat;
#endif /* gif */
#ifdef hdf
extern ImFileFormat ImFileHdfFormat;
#endif /* hdf */
#ifdef ico
extern ImFileFormat ImFileIcoFormat;
#endif /* ico */
#ifdef icon
extern ImFileFormat ImFileIconFormat;
#endif /* icon */
#ifdef iff
extern ImFileFormat ImFileIffFormat;
#endif /* iff */
#ifdef jpeg
extern ImFileFormat ImFileJpegFormat;
#endif /* jpeg */
#ifdef miff
extern ImFileFormat ImFileMiffFormat;
#endif /* miff */
#ifdef mpnt
extern ImFileFormat ImFileMpntFormat;
#endif /* mpnt */
#ifdef pbm
extern ImFileFormat ImFilePbmFormat;
#endif /* pbm */
#ifdef pcx
extern ImFileFormat ImFilePcxFormat;
#endif /* pcx */
#ifdef pic
extern ImFileFormat ImFilePicFormat;
#endif /* pic */
#ifdef pict
extern ImFileFormat ImFilePictFormat;
#endif /* pict */
#ifdef pix
extern ImFileFormat ImFilePixFormat;
#endif /* pix */
#ifdef ps
extern ImFileFormat ImFilePsFormat;
#endif /* ps */
#ifdef ras
extern ImFileFormat ImFileRasFormat;
#endif /* ras */
#ifdef rgb
extern ImFileFormat ImFileRgbFormat;
#endif /* rgb */
#ifdef rla
extern ImFileFormat ImFileRlaFormat;
#endif /* rla */
#ifdef rle
extern ImFileFormat ImFileRleFormat;
#endif /* rle */
#ifdef softimage
extern ImFileFormat ImFileSoftimageFormat;
#endif /* softimage */
#ifdef synu
extern ImFileFormat ImFileSynuFormat;
#endif /* synu */
#ifdef tga
extern ImFileFormat ImFileTgaFormat;
#endif /* tga */
#ifdef tiff
extern ImFileFormat ImFileTiffFormat;
#endif /* tiff */
#ifdef viff
extern ImFileFormat ImFileViffFormat;
#endif /* viff */
#ifdef x
extern ImFileFormat ImFileXFormat;
#endif /* x */
#ifdef xbm
extern ImFileFormat ImFileXbmFormat;
#endif /* xbm */
#ifdef xpm
extern ImFileFormat ImFileXpmFormat;
#endif /* xpm */
#ifdef xwd
extern ImFileFormat ImFileXwdFormat;
#endif /* xwd */
/*
* STATIC VARIABLE
* imFileFormats - ** Master file format table ! **
*
* DESCRIPTION
* Add one pointer to this array initialization for each file format
* struct. Please add them in alphabetical order, sorted by the first
* name in the format's name list. This makes output listings look
* nicer.
*
* It is considered good style to put an #ifdef around each initialization
* so that sites that don't wish all of these formats to be installed
* can simply and easily block one or more.
*/
static ImFileFormat *imFileFormats[ ] =
{
#ifdef bmp
&ImFileBmpFormat,
#endif /* bmp */
#ifdef cur
&ImFileCurFormat,
#endif /* cur */
#ifdef eps
&ImFileEpsFormat,
#endif /* eps */
#ifdef gif
&ImFileGifFormat,
#endif /* gif */
#ifdef hdf
&ImFileHdfFormat,
#endif /* hdf */
#ifdef ico
&ImFileIcoFormat,
#endif /* ico */
#ifdef icon
&ImFileIconFormat,
#endif /* icon */
#ifdef iff
&ImFileIffFormat,
#endif /* iff */
#ifdef jpeg
&ImFileJpegFormat,
#endif /* jpeg */
#ifdef miff
&ImFileMiffFormat,
#endif /* miff */
#ifdef mpnt
&ImFileMpntFormat,
#endif /* mpnt */
#ifdef pbm
&ImFilePbmFormat,
#endif /* pbm */
#ifdef pcx
&ImFilePcxFormat,
#endif /* pcx */
#ifdef pgm
&ImFilePgmFormat,
#endif /* pgm */
#ifdef pic
&ImFilePicFormat,
#endif /* pic */
#ifdef pict
&ImFilePictFormat,
#endif /* pict */
#ifdef pix
&ImFilePixFormat,
#endif /* pix */
#ifdef ps
&ImFilePsFormat,
#endif /* ps */
#ifdef ras
&ImFileRasFormat,
#endif /* ras */
#ifdef rgb
&ImFileRgbFormat,
#endif /* rgb */
#ifdef rla
&ImFileRlaFormat,
#endif /* rla */
#ifdef rle
&ImFileRleFormat,
#endif /* rle */
#ifdef softimage
&ImFileSoftimageFormat,
#endif /* softimage */
#ifdef synu
&ImFileSynuFormat,
#endif /* synu */
#ifdef tga
&ImFileTgaFormat,
#endif /* tga */
#ifdef tiff
&ImFileTiffFormat,
#endif /* tiff */
#ifdef viff
&ImFileViffFormat,
#endif /* viff */
#ifdef x
&ImFileXFormat,
#endif /* x */
#ifdef xbm
&ImFileXbmFormat,
#endif /* xbm */
#ifdef xpm
&ImFileXpmFormat,
#endif /* xpm */
#ifdef xwd
&ImFileXwdFormat,
#endif /* xwd */
NULL /* The table must end with a NULL */
};
/*
* FUNCTION
* ImGetFileFormats
*
* DESCRIPTION
* Give the table to the user.
*/
ImFileFormat**
#ifdef __STDC__
ImGetFileFormats( void )
#else
ImGetFileFormats()
#endif
{
return imFileFormats;
}
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