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ef416fc2 | 1 | /* |
f301802f | 2 | * "$Id: image-pnm.c 5508 2006-05-11 11:41:16Z mike $" |
ef416fc2 | 3 | * |
4 | * Portable Any Map file routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
f301802f | 6 | * Copyright 1993-2006 by Easy Software Products. |
ef416fc2 | 7 | * |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE.txt" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * This file is subject to the Apple OS-Developed Software exception. | |
25 | * | |
26 | * Contents: | |
27 | * | |
28 | * _cupsImageReadPNM() - Read a PNM image file. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Include necessary headers... | |
33 | */ | |
34 | ||
35 | #include "image-private.h" | |
36 | ||
37 | ||
38 | /* | |
39 | * '_cupsImageReadPNM()' - Read a PNM image file. | |
40 | */ | |
41 | ||
42 | int /* O - Read status */ | |
43 | _cupsImageReadPNM( | |
44 | cups_image_t *img, /* IO - cupsImage */ | |
45 | FILE *fp, /* I - cupsImage file */ | |
46 | cups_icspace_t primary, /* I - Primary choice for colorspace */ | |
47 | cups_icspace_t secondary, /* I - Secondary choice for colorspace */ | |
48 | int saturation, /* I - Color saturation (%) */ | |
49 | int hue, /* I - Color hue (degrees) */ | |
50 | const cups_ib_t *lut) /* I - Lookup table for gamma/brightness */ | |
51 | { | |
52 | int x, y; /* Looping vars */ | |
53 | int bpp; /* Bytes per pixel */ | |
54 | cups_ib_t *in, /* Input pixels */ | |
55 | *inptr, /* Current input pixel */ | |
56 | *out, /* Output pixels */ | |
57 | *outptr, /* Current output pixel */ | |
58 | bit; /* Bit in input line */ | |
59 | char line[255], /* Input line */ | |
60 | *lineptr; /* Pointer in line */ | |
61 | int format, /* Format of PNM file */ | |
62 | val, /* Pixel value */ | |
63 | maxval; /* Maximum pixel value */ | |
64 | ||
65 | ||
66 | /* | |
67 | * Read the file header in the format: | |
68 | * | |
69 | * Pformat | |
70 | * # comment1 | |
71 | * # comment2 | |
72 | * ... | |
73 | * # commentN | |
74 | * width | |
75 | * height | |
76 | * max sample | |
77 | */ | |
78 | ||
79 | lineptr = fgets(line, sizeof(line), fp); | |
80 | lineptr ++; | |
81 | ||
82 | format = atoi(lineptr); | |
83 | while (isdigit(*lineptr & 255)) | |
84 | lineptr ++; | |
85 | ||
86 | while (lineptr != NULL && img->xsize == 0) | |
87 | { | |
88 | if (*lineptr == '\0' || *lineptr == '#') | |
89 | lineptr = fgets(line, sizeof(line), fp); | |
90 | else if (isdigit(*lineptr & 255)) | |
91 | { | |
92 | img->xsize = atoi(lineptr); | |
93 | while (isdigit(*lineptr & 255)) | |
94 | lineptr ++; | |
95 | } | |
96 | else | |
97 | lineptr ++; | |
98 | } | |
99 | ||
100 | while (lineptr != NULL && img->ysize == 0) | |
101 | { | |
102 | if (*lineptr == '\0' || *lineptr == '#') | |
103 | lineptr = fgets(line, sizeof(line), fp); | |
104 | else if (isdigit(*lineptr & 255)) | |
105 | { | |
106 | img->ysize = atoi(lineptr); | |
107 | while (isdigit(*lineptr & 255)) | |
108 | lineptr ++; | |
109 | } | |
110 | else | |
111 | lineptr ++; | |
112 | } | |
113 | ||
114 | if (format != 1 && format != 4) | |
115 | { | |
116 | maxval = 0; | |
117 | ||
118 | while (lineptr != NULL && maxval == 0) | |
119 | { | |
120 | if (*lineptr == '\0' || *lineptr == '#') | |
121 | lineptr = fgets(line, sizeof(line), fp); | |
122 | else if (isdigit(*lineptr & 255)) | |
123 | { | |
124 | maxval = atoi(lineptr); | |
125 | while (isdigit(*lineptr & 255)) | |
126 | lineptr ++; | |
127 | } | |
128 | else | |
129 | lineptr ++; | |
130 | } | |
131 | } | |
132 | else | |
133 | maxval = 1; | |
134 | ||
135 | if (img->xsize == 0 || img->xsize > CUPS_IMAGE_MAX_WIDTH || | |
136 | img->ysize == 0 || img->ysize > CUPS_IMAGE_MAX_HEIGHT) | |
137 | { | |
138 | fprintf(stderr, "ERROR: Bad PNM dimensions %dx%d!\n", | |
139 | img->xsize, img->ysize); | |
140 | fclose(fp); | |
141 | return (1); | |
142 | } | |
143 | ||
144 | if (maxval == 0) | |
145 | { | |
146 | fprintf(stderr, "ERROR: Bad PNM max value %d!\n", maxval); | |
147 | fclose(fp); | |
148 | return (1); | |
149 | } | |
150 | ||
151 | if (format == 1 || format == 2 || format == 4 || format == 5) | |
152 | img->colorspace = secondary; | |
153 | else | |
154 | img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary; | |
155 | ||
156 | cupsImageSetMaxTiles(img, 0); | |
157 | ||
158 | bpp = cupsImageGetDepth(img); | |
159 | in = malloc(img->xsize * 3); | |
160 | out = malloc(img->xsize * bpp); | |
161 | ||
162 | /* | |
163 | * Read the image file... | |
164 | */ | |
165 | ||
166 | for (y = 0; y < img->ysize; y ++) | |
167 | { | |
168 | switch (format) | |
169 | { | |
170 | case 1 : | |
171 | case 2 : | |
172 | for (x = img->xsize, inptr = in; x > 0; x --, inptr ++) | |
173 | if (fscanf(fp, "%d", &val) == 1) | |
174 | *inptr = 255 * val / maxval; | |
175 | break; | |
176 | ||
177 | case 3 : | |
178 | for (x = img->xsize, inptr = in; x > 0; x --, inptr += 3) | |
179 | { | |
180 | if (fscanf(fp, "%d", &val) == 1) | |
181 | inptr[0] = 255 * val / maxval; | |
182 | if (fscanf(fp, "%d", &val) == 1) | |
183 | inptr[1] = 255 * val / maxval; | |
184 | if (fscanf(fp, "%d", &val) == 1) | |
185 | inptr[2] = 255 * val / maxval; | |
186 | } | |
187 | break; | |
188 | ||
189 | case 4 : | |
190 | fread(out, (img->xsize + 7) / 8, 1, fp); | |
191 | for (x = img->xsize, inptr = in, outptr = out, bit = 128; | |
192 | x > 0; | |
193 | x --, inptr ++) | |
194 | { | |
195 | if (*outptr & bit) | |
196 | *inptr = 255; | |
197 | else | |
198 | *inptr = 0; | |
199 | ||
200 | if (bit > 1) | |
201 | bit >>= 1; | |
202 | else | |
203 | { | |
204 | bit = 128; | |
205 | inptr ++; | |
206 | } | |
207 | } | |
208 | break; | |
209 | ||
210 | case 5 : | |
211 | fread(in, img->xsize, 1, fp); | |
212 | break; | |
213 | ||
214 | case 6 : | |
215 | fread(in, img->xsize, 3, fp); | |
216 | break; | |
217 | } | |
218 | ||
219 | switch (format) | |
220 | { | |
221 | case 1 : | |
222 | case 2 : | |
223 | case 4 : | |
224 | case 5 : | |
225 | if (img->colorspace == CUPS_IMAGE_WHITE) | |
226 | { | |
227 | if (lut) | |
228 | cupsImageLut(in, img->xsize, lut); | |
229 | ||
230 | _cupsImagePutRow(img, 0, y, img->xsize, in); | |
231 | } | |
232 | else | |
233 | { | |
234 | switch (img->colorspace) | |
235 | { | |
236 | default : | |
237 | break; | |
238 | ||
239 | case CUPS_IMAGE_RGB : | |
240 | cupsImageWhiteToRGB(in, out, img->xsize); | |
241 | break; | |
242 | case CUPS_IMAGE_BLACK : | |
243 | cupsImageWhiteToBlack(in, out, img->xsize); | |
244 | break; | |
245 | case CUPS_IMAGE_CMY : | |
246 | cupsImageWhiteToCMY(in, out, img->xsize); | |
247 | break; | |
248 | case CUPS_IMAGE_CMYK : | |
249 | cupsImageWhiteToCMYK(in, out, img->xsize); | |
250 | break; | |
251 | } | |
252 | ||
253 | if (lut) | |
254 | cupsImageLut(out, img->xsize * bpp, lut); | |
255 | ||
256 | _cupsImagePutRow(img, 0, y, img->xsize, out); | |
257 | } | |
258 | break; | |
259 | ||
260 | default : | |
261 | if ((saturation != 100 || hue != 0) && bpp > 1) | |
262 | cupsImageRGBAdjust(in, img->xsize, saturation, hue); | |
263 | ||
f301802f | 264 | switch (img->colorspace) |
ef416fc2 | 265 | { |
f301802f | 266 | default : |
267 | break; | |
268 | ||
269 | case CUPS_IMAGE_WHITE : | |
270 | cupsImageRGBToWhite(in, out, img->xsize); | |
271 | break; | |
272 | case CUPS_IMAGE_RGB : | |
273 | cupsImageRGBToRGB(in, out, img->xsize); | |
274 | break; | |
275 | case CUPS_IMAGE_BLACK : | |
276 | cupsImageRGBToBlack(in, out, img->xsize); | |
277 | break; | |
278 | case CUPS_IMAGE_CMY : | |
279 | cupsImageRGBToCMY(in, out, img->xsize); | |
280 | break; | |
281 | case CUPS_IMAGE_CMYK : | |
282 | cupsImageRGBToCMYK(in, out, img->xsize); | |
283 | break; | |
ef416fc2 | 284 | } |
ef416fc2 | 285 | |
f301802f | 286 | if (lut) |
287 | cupsImageLut(out, img->xsize * bpp, lut); | |
ef416fc2 | 288 | |
f301802f | 289 | _cupsImagePutRow(img, 0, y, img->xsize, out); |
ef416fc2 | 290 | break; |
291 | } | |
292 | } | |
293 | ||
294 | free(in); | |
295 | free(out); | |
296 | ||
297 | fclose(fp); | |
298 | ||
299 | return (0); | |
300 | } | |
301 | ||
302 | ||
303 | /* | |
f301802f | 304 | * End of "$Id: image-pnm.c 5508 2006-05-11 11:41:16Z mike $". |
ef416fc2 | 305 | */ |