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/*
* Copyright (c) 1999-2000 Image Power, Inc. and the University of
* British Columbia.
* Copyright (c) 2001-2002 Michael David Adams.
* All rights reserved.
*/
/* __START_OF_JASPER_LICENSE__
*
* JasPer License Version 2.0
*
* Copyright (c) 2001-2006 Michael David Adams
* Copyright (c) 1999-2000 Image Power, Inc.
* Copyright (c) 1999-2000 The University of British Columbia
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person (the
* "User") obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the
* following conditions:
*
* 1. The above copyright notices and this permission notice (which
* includes the disclaimer below) shall be included in all copies or
* substantial portions of the Software.
*
* 2. The name of a copyright holder shall not be used to endorse or
* promote products derived from the Software without specific prior
* written permission.
*
* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
* LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
* THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
* "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
*
* __END_OF_JASPER_LICENSE__
*/
/*
* Windows Bitmap File Library
*
* $Id$
*/
#ifndef BMP_COD_H
#define BMP_COD_H
/******************************************************************************\
* Includes.
\******************************************************************************/
#include "jasper/jas_types.h"
/******************************************************************************\
* Constants and macros.
\******************************************************************************/
#define BMP_MAGIC 0x4d42
/* The signature for a BMP file. */
#define BMP_HDRLEN 14
/* The nominal header length. */
#define BMP_INFOLEN 40
/* The nominal info length. */
#define BMP_PALLEN(info) ((info)->numcolors * 4)
/* The length of the palette. */
#define BMP_HASPAL(info) ((info)->numcolors > 0)
/* Is this a palettized image? */
/* Encoding types. */
#define BMP_ENC_RGB 0 /* No special encoding. */
#define BMP_ENC_RLE8 1 /* Run length encoding. */
#define BMP_ENC_RLE4 2 /* Run length encoding. */
/******************************************************************************\
* Types.
\******************************************************************************/
/* BMP header. */
typedef struct {
int_fast16_t magic;
/* The signature (a.k.a. the magic number). */
int_fast32_t siz;
/* The size of the file in 32-bit words. */
int_fast16_t reserved1;
/* Ask Bill Gates what this is all about. */
int_fast16_t reserved2;
/* Ditto. */
int_fast32_t off;
/* The offset of the bitmap data from the bitmap file header in bytes. */
} bmp_hdr_t;
/* Palette entry. */
typedef struct {
int_fast16_t red;
/* The red component. */
int_fast16_t grn;
/* The green component. */
int_fast16_t blu;
/* The blue component. */
int_fast16_t res;
/* Reserved. */
} bmp_palent_t;
/* BMP info. */
typedef struct {
int_fast32_t len;
/* The length of the bitmap information header in bytes. */
int_fast32_t width;
/* The width of the bitmap in pixels. */
int_fast32_t height;
/* The height of the bitmap in pixels. */
int_fast8_t topdown;
/* The bitmap data is specified in top-down order. */
int_fast16_t numplanes;
/* The number of planes. This must be set to a value of one. */
int_fast16_t depth;
/* The number of bits per pixel. */
int_fast32_t enctype;
/* The type of compression used. */
int_fast32_t siz;
/* The size of the image in bytes. */
int_fast32_t hres;
/* The horizontal resolution in pixels/metre. */
int_fast32_t vres;
/* The vertical resolution in pixels/metre. */
int_fast32_t numcolors;
/* The number of color indices used by the bitmap. */
int_fast32_t mincolors;
/* The number of color indices important for displaying the bitmap. */
bmp_palent_t *palents;
/* The colors should be listed in order of importance. */
} bmp_info_t;
/******************************************************************************\
* Functions and macros.
\******************************************************************************/
#define bmp_issupported(hdr, info) \
((hdr)->magic == BMP_MAGIC && !(hdr)->reserved1 && \
!(hdr)->reserved2 && (info)->numplanes == 1 && \
((info)->depth == 8 || (info)->depth == 24) && \
(info)->enctype == BMP_ENC_RGB)
/* Is this type of BMP file supported? */
#define bmp_haspal(info) \
((info)->depth == 8)
/* Is there a palette? */
int bmp_numcmpts(bmp_info_t *info);
/* Get the number of components. */
bmp_info_t *bmp_info_create(void);
/* Create BMP information. */
void bmp_info_destroy(bmp_info_t *info);
/* Destroy BMP information. */
int bmp_isgrayscalepal(bmp_palent_t *palents, int numpalents);
/* Does the specified palette correspond to a grayscale image? */
#endif
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