1 /*
2 WBMP: Wireless Bitmap Type 0: B/W, Uncompressed Bitmap
3 Specification of the WBMP format can be found in the file:
4 SPEC-WAESpec-19990524.pdf
5 You can download the WAP specification on: http://www.wapforum.com/
6
7 gd_wbmp.c
8
9 Copyright (C) Johan Van den Brande (johan@vandenbrande.com)
10
11 Fixed: gdImageWBMPPtr, gdImageWBMP
12
13 Recoded: gdImageWBMPCtx for use with my wbmp library
14 (wbmp library included, but you can find the latest distribution
15 at http://www.vandenbrande.com/wbmp)
16
17 Implemented: gdImageCreateFromWBMPCtx, gdImageCreateFromWBMP
18
19 ---------------------------------------------------------------------------
20
21 Parts of this code are from Maurice Smurlo.
22
23
24 ** Copyright (C) Maurice Szmurlo --- T-SIT --- January 2000
25 ** (Maurice.Szmurlo@info.unicaen.fr)
26
27 ** Permission to use, copy, modify, and distribute this software and its
28 ** documentation for any purpose and without fee is hereby granted, provided
29 ** that the above copyright notice appear in all copies and that both that
30 ** copyright notice and this permission notice appear in supporting
31 ** documentation. This software is provided "as is" without express or
32 ** implied warranty.
33
34 ---------------------------------------------------------------------------
35 Parts od this code are inspired by 'pbmtowbmp.c' and 'wbmptopbm.c' by
36 Terje Sannum <terje@looplab.com>.
37 **
38 ** Permission to use, copy, modify, and distribute this software and its
39 ** documentation for any purpose and without fee is hereby granted, provided
40 ** that the above copyright notice appear in all copies and that both that
41 ** copyright notice and this permission notice appear in supporting
42 ** documentation. This software is provided "as is" without express or
43 ** implied warranty.
44 **
45 ---------------------------------------------------------------------------
46
47 Todo:
48
49 gdCreateFromWBMP function for reading WBMP files
50
51 ----------------------------------------------------------------------------
52 */
53
54 #include <gd.h>
55 #include <gdfonts.h>
56 #include <stdio.h>
57 #include <stdlib.h>
58 #include <limits.h>
59
60 #include "wbmp.h"
61
62
63 /* gd_putout
64 ** ---------
65 ** Wrapper around gdPutC for use with writewbmp
66 **
67 */
68 void gd_putout (int i, void *out)
69 {
70 gdPutC(i, (gdIOCtx *) out);
71 }
72
73
74 /* gd_getin
75 ** --------
76 ** Wrapper around gdGetC for use with readwbmp
77 **
78 */
79 int gd_getin (void *in)
80 {
81 return (gdGetC((gdIOCtx *) in));
82 }
83
84
85 /* gdImageWBMPCtx
86 ** --------------
87 ** Write the image as a wbmp file
88 ** Parameters are:
89 ** image: gd image structure;
90 ** fg: the index of the foreground color. any other value will be
91 ** considered as background and will not be written
92 ** out: the stream where to write
93 */
94 void gdImageWBMPCtx (gdImagePtr image, int fg, gdIOCtx * out)
95 {
96 int x, y, pos;
97 Wbmp *wbmp;
98
99 /* create the WBMP */
100 if ((wbmp = createwbmp (gdImageSX (image), gdImageSY (image), WBMP_WHITE)) == NULL) {
101 php_gd_error("Could not create WBMP");
102 }
103
104 /* fill up the WBMP structure */
105 pos = 0;
106 for (y = 0; y < gdImageSY(image); y++) {
107 for (x = 0; x < gdImageSX(image); x++) {
108 if (gdImageGetPixel (image, x, y) == fg) {
109 wbmp->bitmap[pos] = WBMP_BLACK;
110 }
111 pos++;
112 }
113 }
114
115 /* write the WBMP to a gd file descriptor */
116 if (writewbmp (wbmp, &gd_putout, out)) {
117 php_gd_error("Could not save WBMP");
118 }
119 /* des submitted this bugfix: gdFree the memory. */
120 freewbmp(wbmp);
121 }
122
123 /* gdImageCreateFromWBMPCtx
124 ** ------------------------
125 ** Create a gdImage from a WBMP file input from an gdIOCtx
126 */
127 gdImagePtr gdImageCreateFromWBMPCtx (gdIOCtx * infile)
128 {
129 /* FILE *wbmp_file; */
130 Wbmp *wbmp;
131 gdImagePtr im = NULL;
132 int black, white;
133 int col, row, pos;
134
135 if (readwbmp (&gd_getin, infile, &wbmp)) {
136 return NULL;
137 }
138
139 if (!(im = gdImageCreate (wbmp->width, wbmp->height))) {
140 freewbmp (wbmp);
141 return NULL;
142 }
143
144 /* create the background color */
145 white = gdImageColorAllocate(im, 255, 255, 255);
146 /* create foreground color */
147 black = gdImageColorAllocate(im, 0, 0, 0);
148
149 /* fill in image (in a wbmp 1 = white/ 0 = black) */
150 pos = 0;
151 for (row = 0; row < wbmp->height; row++) {
152 for (col = 0; col < wbmp->width; col++) {
153 if (wbmp->bitmap[pos++] == WBMP_WHITE) {
154 gdImageSetPixel(im, col, row, white);
155 } else {
156 gdImageSetPixel(im, col, row, black);
157 }
158 }
159 }
160
161 freewbmp(wbmp);
162
163 return im;
164 }
165
166 /* gdImageCreateFromWBMP
167 ** ---------------------
168 */
169 gdImagePtr gdImageCreateFromWBMP (FILE * inFile)
170 {
171 gdImagePtr im;
172 gdIOCtx *in = gdNewFileCtx(inFile);
173 im = gdImageCreateFromWBMPCtx(in);
174 in->gd_free(in);
175
176 return im;
177 }
178
179 gdImagePtr gdImageCreateFromWBMPPtr (int size, void *data)
180 {
181 gdImagePtr im;
182 gdIOCtx *in = gdNewDynamicCtxEx(size, data, 0);
183 im = gdImageCreateFromWBMPCtx(in);
184 in->gd_free(in);
185 return im;
186 }
187
188 /* gdImageWBMP
189 ** -----------
190 */
191 void gdImageWBMP (gdImagePtr im, int fg, FILE * outFile)
192 {
193 gdIOCtx *out = gdNewFileCtx(outFile);
194 gdImageWBMPCtx(im, fg, out);
195 out->gd_free(out);
196 }
197
198 /* gdImageWBMPPtr
199 ** --------------
200 */
201 void * gdImageWBMPPtr (gdImagePtr im, int *size, int fg)
202 {
203 void *rv;
204 gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
205 gdImageWBMPCtx(im, fg, out);
206 rv = gdDPExtractData(out, size);
207 out->gd_free(out);
208
209 return rv;
210 }