summaryrefslogtreecommitdiff
path: root/Build/source/libs/gd/libgd-src/src/gd_xbm.c
blob: 29bc5c2e8d53ab68d633f50e8da2037fa52d1439 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
/**
 * File: XBM IO
 *
 * Read and write XBM images.
 */

#ifdef HAVE_CONFIG_H
#	include "config.h"
#endif

#include <ctype.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include "gd.h"
#include "gd_errors.h"
#include "gdhelpers.h"

#ifdef _MSC_VER
# define strcasecmp _stricmp
#endif

#define MAX_XBM_LINE_SIZE 255


/*
  Function: gdImageCreateFromXbm

    <gdImageCreateFromXbm> is called to load images from X bitmap
    format files. Invoke <gdImageCreateFromXbm> with an already opened
    pointer to a file containing the desired
    image. <gdImageCreateFromXbm> returns a <gdImagePtr> to the new
    image, or NULL if unable to load the image (most often because the
    file is corrupt or does not contain an X bitmap format
    image). <gdImageCreateFromXbm> does not close the file.

    You can inspect the sx and sy members of the image to determine
    its size. The image must eventually be destroyed using
    <gdImageDestroy>.

    X11 X bitmaps (which define a char[]) as well as X10 X bitmaps (which define
    a short[]) are supported.

  Parameters:

    fd - The input FILE pointer

  Returns:

    A pointer to the new image or NULL if an error occurred.

  Example:
    (start code)

    gdImagePtr im;
    FILE *in;
    in = fopen("myxbm.xbm", "rb");
    im = gdImageCreateFromXbm(in);
    fclose(in);
    // ... Use the image ...
    gdImageDestroy(im);

    (end code)
*/
BGD_DECLARE(gdImagePtr) gdImageCreateFromXbm(FILE * fd)
{
	char fline[MAX_XBM_LINE_SIZE];
	char iname[MAX_XBM_LINE_SIZE];
	char *type;
	int value;
	unsigned int width = 0, height = 0;
	int fail = 0;
	int max_bit = 0;

	gdImagePtr im;
	int bytes = 0, i;
	int bit, x = 0, y = 0;
	int ch;
	char h[8];
	unsigned int b;

	rewind(fd);
	while (fgets(fline, MAX_XBM_LINE_SIZE, fd)) {
		fline[MAX_XBM_LINE_SIZE-1] = '\0';
		if (strlen(fline) == MAX_XBM_LINE_SIZE-1) {
			return 0;
		}
		if (sscanf(fline, "#define %s %d", iname, &value) == 2) {
			if (!(type = strrchr(iname, '_'))) {
				type = iname;
			} else {
				type++;
			}

			if (!strcmp("width", type)) {
				width = (unsigned int) value;
			}
			if (!strcmp("height", type)) {
				height = (unsigned int) value;
			}
		} else {
			if ( sscanf(fline, "static unsigned char %s = {", iname) == 1
			  || sscanf(fline, "static char %s = {", iname) == 1)
			{
				max_bit = 128;
			} else if (sscanf(fline, "static unsigned short %s = {", iname) == 1
					|| sscanf(fline, "static short %s = {", iname) == 1)
			{
				max_bit = 32768;
			}
			if (max_bit) {
                bytes = (width + 7) / 8 * height;
				if (!bytes) {
					return 0;
				}
				if (!(type = strrchr(iname, '_'))) {
					type = iname;
				} else {
					type++;
				}
				if (!strcmp("bits[]", type)) {
					break;
				}
			}
 		}
	}
	if (!bytes || !max_bit) {
		return 0;
	}

	if(!(im = gdImageCreate(width, height))) {
		return 0;
	}
	gdImageColorAllocate(im, 255, 255, 255);
	gdImageColorAllocate(im, 0, 0, 0);
	h[2] = '\0';
	h[4] = '\0';
	for (i = 0; i < bytes; i++) {
		while (1) {
			if ((ch=getc(fd)) == EOF) {
				fail = 1;
				break;
			}
			if (ch == 'x') {
				break;
			}
		}
		if (fail) {
			break;
		}
		/* Get hex value */
		if ((ch=getc(fd)) == EOF) {
			break;
		}
		h[0] = ch;
		if ((ch=getc(fd)) == EOF) {
			break;
		}
		h[1] = ch;
		if (max_bit == 32768) {
			if ((ch=getc(fd)) == EOF) {
				break;
			}
			h[2] = ch;
			if ((ch=getc(fd)) == EOF) {
				break;
			}
			h[3] = ch;
		}
		sscanf(h, "%x", &b);
		for (bit = 1; bit <= max_bit; bit = bit << 1) {
			gdImageSetPixel(im, x++, y, (b & bit) ? 1 : 0);
			if (x == im->sx) {
				x = 0;
				y++;
				if (y == im->sy) {
					return im;
				}
				break;
			}
		}
	}

	gd_error("EOF before image was complete");
	gdImageDestroy(im);
	return 0;
}


/* {{{ gdCtxPrintf */
static void gdCtxPrintf(gdIOCtx * out, const char *format, ...)
{
	char buf[1024];
	int len;
	va_list args;

	va_start(args, format);
	len = vsnprintf(buf, sizeof(buf)-1, format, args);
	va_end(args);
	out->putBuf(out, buf, len);
}
/* }}} */

/* The compiler will optimize strlen(constant) to a constant number. */
#define gdCtxPuts(out, s) out->putBuf(out, s, strlen(s))


/**
 * Function: gdImageXbmCtx
 *
 *  Writes an image to an IO context in X11 bitmap format.
 *
 * Parameters:
 *
 *  image     - The <gdImagePtr> to write.
 *  file_name - The prefix of the XBM's identifiers. Illegal characters are
 *              automatically stripped.
 *  gd        - Which color to use as forground color. All pixels with another
 *              color are unset.
 *  out       - The <gdIOCtx> to write the image file to.
 * 
 */
BGD_DECLARE(void) gdImageXbmCtx(gdImagePtr image, char* file_name, int fg, gdIOCtx * out)
{
	int x, y, c, b, sx, sy, p;
	char *name, *f;
	size_t i, l;

	name = file_name;
	if ((f = strrchr(name, '/')) != NULL) name = f+1;
	if ((f = strrchr(name, '\\')) != NULL) name = f+1;
	name = strdup(name);
	if ((f = strrchr(name, '.')) != NULL && !strcasecmp(f, ".XBM")) *f = '\0';
	if ((l = strlen(name)) == 0) {
		free(name);
		name = strdup("image");
	} else {
		for (i=0; i<l; i++) {
			/* only in C-locale isalnum() would work */
			if (!isupper(name[i]) && !islower(name[i]) && !isdigit(name[i])) {
				name[i] = '_';
			}
		}
	}

	/* Since "name" comes from the user, run it through a direct puts.
	 * Trying to printf it into a local buffer means we'd need a large
	 * or dynamic buffer to hold it all. */

	/* #define <name>_width 1234 */
	gdCtxPuts(out, "#define ");
	gdCtxPuts(out, name);
	gdCtxPuts(out, "_width ");
	gdCtxPrintf(out, "%d\n", gdImageSX(image));

	/* #define <name>_height 1234 */
	gdCtxPuts(out, "#define ");
	gdCtxPuts(out, name);
	gdCtxPuts(out, "_height ");
	gdCtxPrintf(out, "%d\n", gdImageSY(image));

	/* static unsigned char <name>_bits[] = {\n */
	gdCtxPuts(out, "static unsigned char ");
	gdCtxPuts(out, name);
	gdCtxPuts(out, "_bits[] = {\n  ");

	free(name);

	b = 1;
	p = 0;
	c = 0;
	sx = gdImageSX(image);
	sy = gdImageSY(image);
	for (y = 0; y < sy; y++) {
		for (x = 0; x < sx; x++) {
			if (gdImageGetPixel(image, x, y) == fg) {
				c |= b;
			}
			if ((b == 128) || (x == sx - 1)) {
				b = 1;
				if (p) {
					gdCtxPuts(out, ", ");
					if (!(p%12)) {
						gdCtxPuts(out, "\n  ");
						p = 12;
					}
				}
				p++;
				gdCtxPrintf(out, "0x%02X", c);
				c = 0;
			} else {
				b <<= 1;
			}
		}
	}
	gdCtxPuts(out, "};\n");
}