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 <gd_errors.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <limits.h>
60
61 #include "wbmp.h"
62
63
64 /* gd_putout
65 ** ---------
66 ** Wrapper around gdPutC for use with writewbmp
67 **
68 */
gd_putout(int i,void * out)69 void gd_putout (int i, void *out)
70 {
71 gdPutC(i, (gdIOCtx *) out);
72 }
73
74
75 /* gd_getin
76 ** --------
77 ** Wrapper around gdGetC for use with readwbmp
78 **
79 */
gd_getin(void * in)80 int gd_getin (void *in)
81 {
82 return (gdGetC((gdIOCtx *) in));
83 }
84
85
86 /* gdImageWBMPCtx
87 ** --------------
88 ** Write the image as a wbmp file
89 ** Parameters are:
90 ** image: gd image structure;
91 ** fg: the index of the foreground color. any other value will be
92 ** considered as background and will not be written
93 ** out: the stream where to write
94 */
gdImageWBMPCtx(gdImagePtr image,int fg,gdIOCtx * out)95 void gdImageWBMPCtx (gdImagePtr image, int fg, gdIOCtx * out)
96 {
97 int x, y, pos;
98 Wbmp *wbmp;
99
100 /* create the WBMP */
101 if ((wbmp = createwbmp (gdImageSX (image), gdImageSY (image), WBMP_WHITE)) == NULL) {
102 gd_error("Could not create WBMP");
103 return;
104 }
105
106 /* fill up the WBMP structure */
107 pos = 0;
108 for (y = 0; y < gdImageSY(image); y++) {
109 for (x = 0; x < gdImageSX(image); x++) {
110 if (gdImageGetPixel (image, x, y) == fg) {
111 wbmp->bitmap[pos] = WBMP_BLACK;
112 }
113 pos++;
114 }
115 }
116
117 /* write the WBMP to a gd file descriptor */
118 if (writewbmp (wbmp, &gd_putout, out)) {
119 gd_error("Could not save WBMP");
120 }
121 /* des submitted this bugfix: gdFree the memory. */
122 freewbmp(wbmp);
123 }
124
125 /* gdImageCreateFromWBMPCtx
126 ** ------------------------
127 ** Create a gdImage from a WBMP file input from an gdIOCtx
128 */
gdImageCreateFromWBMPCtx(gdIOCtx * infile)129 gdImagePtr gdImageCreateFromWBMPCtx (gdIOCtx * infile)
130 {
131 /* FILE *wbmp_file; */
132 Wbmp *wbmp;
133 gdImagePtr im = NULL;
134 int black, white;
135 int col, row, pos;
136
137 if (readwbmp (&gd_getin, infile, &wbmp)) {
138 return NULL;
139 }
140
141 if (!(im = gdImageCreate (wbmp->width, wbmp->height))) {
142 freewbmp (wbmp);
143 return NULL;
144 }
145
146 /* create the background color */
147 white = gdImageColorAllocate(im, 255, 255, 255);
148 /* create foreground color */
149 black = gdImageColorAllocate(im, 0, 0, 0);
150
151 /* fill in image (in a wbmp 1 = white/ 0 = black) */
152 pos = 0;
153 for (row = 0; row < wbmp->height; row++) {
154 for (col = 0; col < wbmp->width; col++) {
155 if (wbmp->bitmap[pos++] == WBMP_WHITE) {
156 gdImageSetPixel(im, col, row, white);
157 } else {
158 gdImageSetPixel(im, col, row, black);
159 }
160 }
161 }
162
163 freewbmp(wbmp);
164
165 return im;
166 }
167
168 /* gdImageCreateFromWBMP
169 ** ---------------------
170 */
gdImageCreateFromWBMP(FILE * inFile)171 gdImagePtr gdImageCreateFromWBMP (FILE * inFile)
172 {
173 gdImagePtr im;
174 gdIOCtx *in = gdNewFileCtx(inFile);
175 im = gdImageCreateFromWBMPCtx(in);
176 in->gd_free(in);
177
178 return im;
179 }
180
gdImageCreateFromWBMPPtr(int size,void * data)181 gdImagePtr gdImageCreateFromWBMPPtr (int size, void *data)
182 {
183 gdImagePtr im;
184 gdIOCtx *in = gdNewDynamicCtxEx(size, data, 0);
185 im = gdImageCreateFromWBMPCtx(in);
186 in->gd_free(in);
187 return im;
188 }
189
190 /* gdImageWBMP
191 ** -----------
192 */
gdImageWBMP(gdImagePtr im,int fg,FILE * outFile)193 void gdImageWBMP (gdImagePtr im, int fg, FILE * outFile)
194 {
195 gdIOCtx *out = gdNewFileCtx(outFile);
196 gdImageWBMPCtx(im, fg, out);
197 out->gd_free(out);
198 }
199
200 /* gdImageWBMPPtr
201 ** --------------
202 */
gdImageWBMPPtr(gdImagePtr im,int * size,int fg)203 void * gdImageWBMPPtr (gdImagePtr im, int *size, int fg)
204 {
205 void *rv;
206 gdIOCtx *out = gdNewDynamicCtx(2048, NULL);
207 gdImageWBMPCtx(im, fg, out);
208 rv = gdDPExtractData(out, size);
209 out->gd_free(out);
210
211 return rv;
212 }
213
