2 * Copyright (c) 2001-2003 Michael David Adams.
6 /* __START_OF_JASPER_LICENSE__
8 * JasPer License Version 2.0
10 * Copyright (c) 1999-2000 Image Power, Inc.
11 * Copyright (c) 1999-2000 The University of British Columbia
12 * Copyright (c) 2001-2003 Michael David Adams
14 * All rights reserved.
16 * Permission is hereby granted, free of charge, to any person (the
17 * "User") obtaining a copy of this software and associated documentation
18 * files (the "Software"), to deal in the Software without restriction,
19 * including without limitation the rights to use, copy, modify, merge,
20 * publish, distribute, and/or sell copies of the Software, and to permit
21 * persons to whom the Software is furnished to do so, subject to the
22 * following conditions:
24 * 1. The above copyright notices and this permission notice (which
25 * includes the disclaimer below) shall be included in all copies or
26 * substantial portions of the Software.
28 * 2. The name of a copyright holder shall not be used to endorse or
29 * promote products derived from the Software without specific prior
32 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
33 * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
34 * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
35 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
36 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
37 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
38 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
39 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
40 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
41 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
42 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
43 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
44 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
45 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
46 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
47 * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
48 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
49 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
50 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
51 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
52 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
53 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
54 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
55 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
56 * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
57 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
59 * __END_OF_JASPER_LICENSE__
62 /******************************************************************************\
64 \******************************************************************************/
68 #include "jasper/jas_tvp.h"
69 #include "jasper/jas_stream.h"
70 #include "jasper/jas_image.h"
71 #include "jasper/jas_string.h"
72 #include "jasper/jas_debug.h"
77 /******************************************************************************\
79 \******************************************************************************/
81 static int pgx_puthdr(jas_stream_t *out, pgx_hdr_t *hdr);
82 static int pgx_putdata(jas_stream_t *out, pgx_hdr_t *hdr, jas_image_t *image, int cmpt);
83 static int pgx_putword(jas_stream_t *out, bool bigendian, int prec,
85 static uint_fast32_t pgx_inttoword(int_fast32_t val, int prec, bool sgnd);
87 /******************************************************************************\
88 * Code for save operation.
89 \******************************************************************************/
91 /* Save an image to a stream in the the PGX format. */
93 int pgx_encode(jas_image_t *image, jas_stream_t *out, char *optstr)
101 pgx_enc_t *enc = &encbuf;
103 /* Avoid compiler warnings about unused parameters. */
106 switch (jas_clrspc_fam(jas_image_clrspc(image))) {
107 case JAS_CLRSPC_FAM_GRAY:
108 if ((enc->cmpt = jas_image_getcmptbytype(image,
109 JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_GRAY_Y))) < 0) {
110 jas_eprintf("error: missing color component\n");
115 jas_eprintf("error: BMP format does not support color space\n");
120 width = jas_image_cmptwidth(image, enc->cmpt);
121 height = jas_image_cmptheight(image, enc->cmpt);
122 prec = jas_image_cmptprec(image, enc->cmpt);
123 sgnd = jas_image_cmptsgnd(image, enc->cmpt);
125 /* The PGX format is quite limited in the set of image geometries
126 that it can handle. Here, we check to ensure that the image to
127 be saved can actually be represented reasonably accurately using the
129 /* There must be exactly one component. */
130 if (jas_image_numcmpts(image) > 1 || prec > 16) {
131 fprintf(stderr, "The PNM format cannot be used to represent an image with this geometry.\n");
135 hdr.magic = PGX_MAGIC;
136 hdr.bigendian = true;
143 pgx_dumphdr(stderr, &hdr);
146 if (pgx_puthdr(out, &hdr)) {
150 if (pgx_putdata(out, &hdr, image, enc->cmpt)) {
157 /******************************************************************************\
158 \******************************************************************************/
160 static int pgx_puthdr(jas_stream_t *out, pgx_hdr_t *hdr)
162 jas_stream_printf(out, "%c%c", hdr->magic >> 8, hdr->magic & 0xff);
163 jas_stream_printf(out, " %s %s %d %ld %ld\n", hdr->bigendian ? "ML" : "LM",
164 hdr->sgnd ? "-" : "+", hdr->prec, (long) hdr->width, (long) hdr->height);
165 if (jas_stream_error(out)) {
171 static int pgx_putdata(jas_stream_t *out, pgx_hdr_t *hdr, jas_image_t *image, int cmpt)
181 if (!(data = jas_matrix_create(1, hdr->width))) {
184 for (y = 0; y < hdr->height; ++y) {
185 if (jas_image_readcmpt(image, cmpt, 0, y, hdr->width, 1, data)) {
188 for (x = 0; x < hdr->width; ++x) {
189 v = jas_matrix_get(data, 0, x);
190 word = pgx_inttoword(v, hdr->prec, hdr->sgnd);
191 if (pgx_putword(out, hdr->bigendian, hdr->prec, word)) {
196 jas_matrix_destroy(data);
202 jas_matrix_destroy(data);
207 static int pgx_putword(jas_stream_t *out, bool bigendian, int prec,
214 val &= (1 << prec) - 1;
215 wordsize = (prec + 7) /8;
216 for (i = 0; i < wordsize; ++i) {
217 j = bigendian ? (wordsize - 1 - i) : i;
218 if (jas_stream_putc(out, (val >> (8 * j)) & 0xff) == EOF) {
225 static uint_fast32_t pgx_inttoword(jas_seqent_t v, int prec, bool sgnd)
228 ret = ((sgnd && v < 0) ? ((1 << prec) + v) : v) & ((1 << prec) - 1);