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iff.library_v1.6
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1990-03-09
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Documentation for iff.library V1.6
Copyright (C) 1989 by Robert W. Albrecht, All Rights Reserved.
Software written and distributed by:
Robert W. Albrecht Jr.
1457 Zion Way
Ventura, CA 93003
iff.library Version 1.6 (Shareware Version)
This is shareware. Iff.library 1.6 will load iff pictures but it will
not save them. If you wish to distribute iff.library with your
application please send twenty bucks to the above address and you will
get a fully functional iff.library and a license to distribute
iff.library with your commercial applications. There are no royalties.
The documentation for the PutIFF functions is included to show you
what you will get for the $20.00 license fee, they are not included
in this release.
Contents of this release
iff.doc - This documantation
readme - Listing of contents
shoimg - Load and display an Intuition Image
shoimg.c - Source to above
shopict - Load a picture directly into the screen's bitmap
shopict.c - Source to above
shopict.man - Manual for ShoPict
printer.c - Source to printer device handler
putproject.c - Source for icon saving routine
faces.c - ShoPict icon images
makefile - Aztec 5.0A makefile for example programs and iff.o
ifflib.h - Header file for application programs
iff.asm - 68000 assembly source for connection routines
iff.o - Aztec 5.0A compatable object from iff.asm
iff.library - V1.6 library to put in the libs: directory
Two Example Programs Included (with source)
The ShoImg program has this syntax...
ShoImg <IFF file name>
It allocates and loads an Image structure from an IFF file and
displays it on the screen. Iff.library does the memory managment.
ShoPict displays almost any IFF image on a custom screen by loading the
IFF image directly into the BitMap of the custom screen. ShoPict will
now print the currently loaded picture if you press the 'P' key.
ShoPict was modified to handle over scan pictures. ShoPict will now
save an IFF image to the file "ram:temp.pic" if you press the 'S' key.
It will also write an icon if you press the 'I' key. For more
information see the ShoPict.man file.
----------------------------------------------------------------------
Setting up to use iff.library
Iff.library is accessed through a set of assembly language connection
routines. The assembly source to these routines is provided in the
file "iff.asm". You will need to assemble iff.asm unless you have
Aztec C 5.0A (or compatable) for which there is a ".o" file. Once
iff.asm is assembled you will have to link it with your program. You
will also have to copy iff.library to the libs: directory on your system
disk. There is now an Amiga.lib compatable iff.o called iff.ami.
The version number for iff.library version 1.6 is 1, and is defined in
ifflib.h as IFFVERSION. The crippled version of iff.library (version
1.6) does not contain the functions: PutIFF, PutIFF_screen, and
PutIFF_window. If you specify a number less than 2 in the OpenLibrary
version number you should not expect to use these functions. If the
user has a version of iff.library that is less than version 2.0 and you
try to call one of the version 2.0 or above functions, very bad things
will happen (they will probably see the guru.)
In your program you will have to:
1) Include the proper header file.
#include "ifflib.h"
2) Declare a global library base pointer;
void *IFFBase;
3) Open iff.library.
if( !(IFFBase = OpenLibrary(IFFNAME,IFFVERSION)) )
/* abort */
Now you are ready to call the functions in iff.library.
Description of Functions
------------------------------------------------------------------
name: IFFalloc
synopsis: void *IFFalloc(size,type)
long size;
unsigned short type;
function: Allocates and clears a block of memory using the Amiga
AllocMem function. The size of the block is saved so your
program doesn't have to remember it.
arguments: size - The requested size of the block of memory, four
extra bytes will be added to store the size of the block.
type - The type of Amiga memory you want to allocate;
CHIP for "CHIP" memory, FAST for "FAST" memory, and
DONTCARE if you don't care what type you allocate.
Note: Graphic images need to be in CHIP memory.
return: NULL (0L) is returned if the block can't be allocated,
otherwise a pointer to the allocated block is returned.
see also: IFFfree
---------------------------------------------------------------------
name: IFFfree
synopsis: void IFFfree(ptr)
function: Frees memory allocated by IFFalloc.
argument: ptr - a pointer to a block of memory obtained from IFFalloc.
return: None
note: IFFfree is used to free the colors obtained from GetIFF_image
or GetIFF_bitmap.
see also: IFFalloc
---------------------------------------------------------------------
name: GetIFF_bitmap
synopsis: short GetIFF_bitmap(name,bmap,colors,ncolors,allocate)
char *name;
struct BitMap **bmap;
unsigned short **colors;
unsigned short *ncolors;
unsigned short allocate;
function: To load and optionally allocate a BitMap and colors from
an IFF file.
arguments: name - A null terminated string containing the name of the
iff IFF file to load.
bmap - A pointer to a pointer to a BitMap structure. If
you decide let this function allocate the structure the
pointer will be set to the newly allocated BitMap.
colors - A pointer to an array of color values, one for each
color. The colors are organized in the native Amiga
format (RGB 4 bits per gun right justified). If you
decide to let this function allocate the colors
the pointer will be set to the newly allocated block.
ncolors - A pointer to a variable that will be set to the
number of colors in the IFF file.
allocate - Set to ALLOC if you want the colors and BitMap
allocated by this function. Otherwise set to NOALLOC.
return: Zero is returned if the operation was successful, otherwise
one of the error codes in ifflib.h is returned.
see also: RlsBitMap IFFfree
note: The BitMap structure is defined in graphics/gfx.h
---------------------------------------------------------------------
name: GetIFF_image
synopsis: short GetIFF_image(name,image,colors,ncolors,allocate)
char *name;
struct Image **image;
unsigned short **colors;
unsigned short *ncolors;
unsigned short allocate;
function: To load and optionally allocate a Image and colors from
an IFF file.
arguments: name - A null terminated string containing the name of the
iff IFF file to load.
image - A pointer to a pointer to an Image structure. If
you decide let this function allocate the structure the
pointer will be set to the newly allocated Image.
colors - A pointer to an array of color values, one for each
color. The colors are organized in the native Amiga
format (RGB 4 bits per gun right justified). If you
decide to let this function allocate the colors
the pointer will be set to the newly allocated block.
ncolors - A pointer to a variable that will be set to the
number of colors in the IFF file.
allocate - Set to ALLOC if you want the colors and Image
allocated by this function. Otherwise set to NOALLOC.
return: Zero is returned if the operation was successful, otherwise
one of the error codes in ifflib.h is returned.
see also: RlsImage IFFfree
note: The Image structure is defined in intuition/intuition.h
---------------------------------------------------------------------
name: PutIFF
synopsis: short PutIFF(name,bm,vp,cm)
char *name;
struct BitMap *bm;
struct ViewPort *vp;
struct ColorMap *cm;
function: To save a graphics image to an IFF picture file. The image
data is compressed while it is being saved to the file.
arguments: name - A null terminated string containing the name of the
file to save the IFF picture to.
bm - A pointer the the BitMap structure where the image data
for this file is located.
vp - A pointer to the ViewPort structure for this display.
The view port structure is used because the "view modes"
(LACE,HAM,HIRES etc.) are stored there, and this function
will save that information in an IFF CAMG chunk.
cm - A pointer to a ColorMap structure where the colors
for this image are stored. The colors for each picture are
stored in the file.
return: Zero is returned if the operation was successful, otherwise
one of the error codes in ifflib.h is returned.
note: The BitMap structure is defined in "graphics/gfx.h".
The ViewPort and ColorMap structures are defined in
"graphics/view.h"
--------------------------------------------------------------------
name: PutIFF_screen
synopsis: short PutIFF_screen(name,screen)
char *name;
struct Screen *screen;
function: Saves the image from an Intuition Screen to the named file.
This function is simply for convienence, since all it does is
call PutIFF with the correct arguments for a Screen.
argument: screen - a pointer to an Intuition Screen structure.
return: Zero is returned if the operation was successful, otherwise
one of the error codes in ifflib.h is returned.
note: The Screen structure is defined in "intuition/intuition.h".
---------------------------------------------------------------------
name: PutIFF_window
synopsis: short PutIFF_window(name,window)
char *name;
struct Window *window;
function: Saves the image from an Intuition Window to the named file.
This function is simply for convienence, since all it does is
call PutIFF with the correct arguments for a Window.
return: Zero is returned if the operation was successful, otherwise
one of the error codes in ifflib.h is returned.
note: The Window structure is defined in "intuition/intuition.h".
---------------------------------------------------------------------
name: QueryIFF
synopsis: short QueryIFF(name,bmHdr)
char *name;
BitMapHeader *bmHdr;
function: To retrieve information about a image in a IFF file.
arguments: name - A null terminated string containing the name of
an IFF file.
bmHdr - A pointer to a BitMapHeader structure. When this
function returns the BitMapHeader will be filled with the
information about the image in the IFF file. In order to
get the original screen ViewModes from the IFF file, if
this information is there in the form of a CAMG chunk,
you must set the bmHdr.viewmodes = GETVIEWMODES. If
bmHdr.viewmodes field is changed after the call then
the ViewModes were obtained from the IFF file. You should
never assume that the ViewModes can be obtained from the
file because this feature was not supported prior to V1.3
of IFF.library. Also most IFF files don't contain this
information.
return: Zero is returned if the operation was successful, otherwise
one of the error codes in ifflib.h is returned.
note: The BitMapHeader structure is defined in ifflib.h
---------------------------------------------------------------------
name: RlsBitMap
synopsis: void RlsBitMap(bmap)
struct BitMap *bmap;
function: Frees the memory allocated for a BitMap structure by
GetIFF_bitmap. The BitMap structure is allocated in two
parts, one for the structure itself and one for the bit-
planes.
argument: bmap - A pointer to a BitMap structure obtained from
GetIFF_bitmap.
return: None
see also: GetIFF_bitmap
---------------------------------------------------------------------
name: RlsImage
synopsis: void RlsImage(image)
struct Image *image;
function: Frees the memory allocated for a Image structure by
GetIFF_image. The Image structure is allocated in two
parts, one for the structure itself and one for the bit-
planes.
argument: image - A pointer to a Image structure obtained from
GetIFF_image.
return: None
see also: GetIFF_image
----------------------------------------------------------------------
Revision history:
2/89
1.0 Initial Revision
5/89
1.1 Fixed bug in library Expunge routine and added the
picture printing program. Added a object module that
is compatable with Alink.
5/89
1.2 Made de-compression routine much faster by coding it
in assembly language.
6/89
1.3 Modified iff.library such that the original screen ViewModes
will be saved into the BitMapHeader structure if they are
present in the form of a CAMG chunk. Eliminated the PrntPict
program and allowed the picture to be printed from ShoPict
if the 'P' key is pressed. Added support for over scan pictures
in ShoPict.
8/89
1.4 Added a picture save feature to the ShoPict program that saves
the picture when the 'S' key is pressed, and made the mouse
pointer change when a picture is being saved or printed. When
the 'S' key is pressed the picture will be saved to the file
ram:temp.pic. Cleaned up the iff.asm file such that is uses a
macro.
10/89
1.5 Added a feature to ShoPict where you can press the 'I' key and
an icon for the picture will be saved. Also added wild-card
and workbench support. Got it working with CClib.library,
saving much in memory.
2/90
1.6 Adapted to Aztec C 5.0. Changed ifflib.h header file to include
function prototypes and re-compiled library. Still 100%
compatable with iff.library 2.5 and below, but it's 200
bytes bigger.
---------------------------------------------------------------------
LICENSE
Robert W. Albrecht is the exclusive owner of the enclosed Software
and Documentation. You are granted non-exclusive license to use the
Software and Documentation, but you are not the owner of them.
Your right to use the Software and Documentation under this
agreement is the "License". "You" means the individual or legal
entity whose agent receives this software and accepts this Agreement.
"Software" means the computer program recorded on the floppy-disk or
other media, any update to them Robert W. Albrecht may later provide
you, and any back-up copies made. "Documentation" means the user
manual and other materials packaged with this Software.
Transfer
You may may transfer the license for the use of the Software or
Documentation to another person.
Backup Copies
Make as many copies as you want.
Term
The license is effective for twenty (20) years from the time you
receive the software. You may terminate the license at any time by
returning all software and documentation.
Robert W. Albrecht's rights.
The iff.library Software and Documentation is protected by copyright,
trade secret and trademark laws. You may not disclose the Software or
Documentation to others, except as allowed in this license agreement,
or remove or alter ownership, trademark and copyright notices on
Documentation or Software. YOU MUST MAKE A GOOD FAITH EFFORT TO
PREVENT ANY UNAUTHORIZED USE, COPYING, OR DISCLOSURE OF THE SOFTWARE
OR DOCUMENTATION. THESE OBLIGATIONS WILL SURVIVE ANY TERMINATION OF
THE LICENSE AGREEMENT.
Disclaimer of other Warranties, and Liabilities.
THERE ARE NO WARRANTIES, EITHER EXPRESSED OR IMPLIED, FOR THE
SOFTWARE OR DOCUMENTATION, WHICH ARE BOTH LICENSED TO YOU "AS IS".
ROBERT W. ALBRECHT EXPRESSLY DISCLAIMS ANY WARRANTY AS TO THE
PERFORMANCE OF THE SOFTWARE, OR DOCUMENTATION. HE ALSO DISCLAIMS ALL
OTHER WARRANTIES, INCLUDING (WITHOUT LIMITATION) IMPLIED WARRANTIES
OF MERCANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
SHALL ANYONE INVOLVED IN THE CREATION, PRODUCTION, OR DISTRIBUTION,
OF THE SOFTWARE OR DOCUMENTATION BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCEDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE
SOFTWARE OR DOCUMENTATION OR ARISING FROM ANY BREACH OF ANY WARRANTY.
Some states do not allow the exclusion or limitation of implied
warranties or liability for incedental or consequential damages so
the above exclusion and limitation may not apply to you. IN ADDITON
TO THE ABOVE LIMITATION, OUR LIABILITY TO YOU OR TO ANYONE ELSE FOR
DAMAGES SHALL NOT EXCEED THE LICENSE FEE PAID BY YOU FOR THE SOFTWARE
AND DOCUMENTATION.