vx32

Local 9vx git repository for patches.
git clone git://r-36.net/vx32
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bmp_cod.c (4716B)

      1 /*
      2  * Copyright (c) 1999-2000 Image Power, Inc. and the University of
      3  *   British Columbia.
      4  * Copyright (c) 2001-2002 Michael David Adams.
      5  * All rights reserved.
      6  */
      7 
      8 /* __START_OF_JASPER_LICENSE__
      9  * 
     10  * JasPer License Version 2.0
     11  * 
     12  * Copyright (c) 1999-2000 Image Power, Inc.
     13  * Copyright (c) 1999-2000 The University of British Columbia
     14  * Copyright (c) 2001-2003 Michael David Adams
     15  * 
     16  * All rights reserved.
     17  * 
     18  * Permission is hereby granted, free of charge, to any person (the
     19  * "User") obtaining a copy of this software and associated documentation
     20  * files (the "Software"), to deal in the Software without restriction,
     21  * including without limitation the rights to use, copy, modify, merge,
     22  * publish, distribute, and/or sell copies of the Software, and to permit
     23  * persons to whom the Software is furnished to do so, subject to the
     24  * following conditions:
     25  * 
     26  * 1.  The above copyright notices and this permission notice (which
     27  * includes the disclaimer below) shall be included in all copies or
     28  * substantial portions of the Software.
     29  * 
     30  * 2.  The name of a copyright holder shall not be used to endorse or
     31  * promote products derived from the Software without specific prior
     32  * written permission.
     33  * 
     34  * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
     35  * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
     36  * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
     37  * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
     38  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
     39  * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
     40  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
     41  * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
     42  * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
     43  * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
     44  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
     45  * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
     46  * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
     47  * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
     48  * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
     49  * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
     50  * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
     51  * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
     52  * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
     53  * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
     54  * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
     55  * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
     56  * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
     57  * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
     58  * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
     59  * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
     60  * 
     61  * __END_OF_JASPER_LICENSE__
     62  */
     63 
     64 /*
     65  * Windows Bitmap File Library
     66  *
     67  * $Id: bmp_cod.c 1918 2005-07-24 14:12:08Z baford $
     68  */
     69 
     70 /******************************************************************************\
     71 * Includes.
     72 \******************************************************************************/
     73 
     74 #include <assert.h>
     75 
     76 #include "jasper/jas_types.h"
     77 #include "jasper/jas_image.h"
     78 #include "jasper/jas_malloc.h"
     79 
     80 #include "bmp_cod.h"
     81 
     82 /******************************************************************************\
     83 * Constructors and destructors.
     84 \******************************************************************************/
     85 
     86 bmp_info_t *bmp_info_create()
     87 {
     88 	bmp_info_t *info;
     89 	if (!(info = jas_malloc(sizeof(bmp_info_t)))) {
     90 		return 0;
     91 	}
     92 	info->palents = 0;
     93 	return info;
     94 }
     95 
     96 void bmp_info_destroy(bmp_info_t *info)
     97 {
     98 	if (info->palents) {
     99 		jas_free(info->palents);
    100 	}
    101 	jas_free(info);
    102 }
    103 
    104 /******************************************************************************\
    105 * Miscellaneous functions.
    106 \******************************************************************************/
    107 
    108 int bmp_isgrayscalepal(bmp_palent_t *palents, int numpalents)
    109 {
    110 	bmp_palent_t *palent;
    111 	int i;
    112 
    113 	for (i = numpalents, palent = palents; i > 0; --i, ++palent) {
    114 		if (palent->red != palent->grn || palent->red != palent->blu) {
    115 			return 0;
    116 		}
    117 	}
    118 	return 1;
    119 }
    120 
    121 int bmp_numcmpts(bmp_info_t *info)
    122 {
    123 	int numcmpts;
    124 
    125 	if (info->depth == 24) {
    126 		numcmpts = 3;
    127 	} else if (info->depth == 8) {
    128 		numcmpts = bmp_isgrayscalepal(info->palents, info->numcolors) ?
    129 		  1 : 3;
    130 	} else {
    131 		numcmpts = 0;
    132 		abort();
    133 	}
    134 	return numcmpts;
    135 }