]>
Commit | Line | Data |
---|---|---|
ef416fc2 | 1 | /* |
7a6a01dd | 2 | * "$Id$" |
ef416fc2 | 3 | * |
4 | * JPEG image 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 | * _cupsImageReadJPEG() - Read a JPEG image file. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Include necessary headers... | |
33 | */ | |
34 | ||
35 | #include "image-private.h" | |
36 | ||
37 | #ifdef HAVE_LIBJPEG | |
38 | # include <jpeglib.h> /* JPEG/JFIF image definitions */ | |
39 | ||
40 | ||
41 | /* | |
42 | * '_cupsImageReadJPEG()' - Read a JPEG image file. | |
43 | */ | |
44 | ||
45 | int /* O - Read status */ | |
46 | _cupsImageReadJPEG( | |
47 | cups_image_t *img, /* IO - cupsImage */ | |
48 | FILE *fp, /* I - cupsImage file */ | |
49 | cups_icspace_t primary, /* I - Primary choice for colorspace */ | |
50 | cups_icspace_t secondary, /* I - Secondary choice for colorspace */ | |
51 | int saturation, /* I - Color saturation (%) */ | |
52 | int hue, /* I - Color hue (degrees) */ | |
53 | const cups_ib_t *lut) /* I - Lookup table for gamma/brightness */ | |
54 | { | |
55 | struct jpeg_decompress_struct cinfo; /* Decompressor info */ | |
56 | struct jpeg_error_mgr jerr; /* Error handler info */ | |
57 | cups_ib_t *in, /* Input pixels */ | |
58 | *out; /* Output pixels */ | |
59 | char header[16]; /* Photoshop JPEG header */ | |
60 | int psjpeg; /* Non-zero if Photoshop JPEG */ | |
61 | static const char *cspaces[] = | |
62 | { /* JPEG colorspaces... */ | |
63 | "JCS_UNKNOWN", | |
64 | "JCS_GRAYSCALE", | |
65 | "JCS_RGB", | |
66 | "JCS_YCbCr", | |
67 | "JCS_CMYK", | |
68 | "JCS_YCCK" | |
69 | }; | |
70 | ||
71 | ||
72 | /* | |
73 | * Read the first 16 bytes to determine if this is a Photoshop JPEG file... | |
74 | */ | |
75 | ||
76 | fread(header, sizeof(header), 1, fp); | |
77 | rewind(fp); | |
78 | ||
79 | psjpeg = memcmp(header + 6, "Photoshop ", 10) == 0; | |
80 | ||
81 | /* | |
82 | * Read the JPEG header... | |
83 | */ | |
84 | ||
85 | cinfo.err = jpeg_std_error(&jerr); | |
86 | jpeg_create_decompress(&cinfo); | |
87 | jpeg_stdio_src(&cinfo, fp); | |
88 | jpeg_read_header(&cinfo, 1); | |
89 | ||
90 | cinfo.quantize_colors = 0; | |
91 | ||
92 | fprintf(stderr, "DEBUG: num_components = %d\n", cinfo.num_components); | |
93 | fprintf(stderr, "DEBUG: jpeg_color_space = %s\n", | |
94 | cspaces[cinfo.jpeg_color_space]); | |
95 | ||
96 | if (cinfo.num_components == 1) | |
97 | { | |
98 | fputs("DEBUG: Converting image to grayscale...\n", stderr); | |
99 | ||
100 | cinfo.out_color_space = JCS_GRAYSCALE; | |
101 | cinfo.out_color_components = 1; | |
102 | cinfo.output_components = 1; | |
103 | ||
104 | img->colorspace = secondary; | |
105 | } | |
106 | else if (cinfo.num_components == 4) | |
107 | { | |
108 | fputs("DEBUG: Converting image to CMYK...\n", stderr); | |
109 | ||
110 | cinfo.out_color_space = JCS_CMYK; | |
111 | cinfo.out_color_components = 4; | |
112 | cinfo.output_components = 4; | |
113 | ||
114 | img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_CMYK : primary; | |
115 | } | |
116 | else | |
117 | { | |
118 | fputs("DEBUG: Converting image to RGB...\n", stderr); | |
119 | ||
120 | cinfo.out_color_space = JCS_RGB; | |
121 | cinfo.out_color_components = 3; | |
122 | cinfo.output_components = 3; | |
123 | ||
124 | img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary; | |
125 | } | |
126 | ||
127 | jpeg_calc_output_dimensions(&cinfo); | |
128 | ||
129 | if (cinfo.output_width <= 0 || cinfo.output_width > CUPS_IMAGE_MAX_WIDTH || | |
130 | cinfo.output_height <= 0 || cinfo.output_height > CUPS_IMAGE_MAX_HEIGHT) | |
131 | { | |
132 | fprintf(stderr, "ERROR: Bad JPEG dimensions %dx%d!\n", | |
133 | cinfo.output_width, cinfo.output_height); | |
134 | ||
135 | jpeg_destroy_decompress(&cinfo); | |
136 | ||
137 | fclose(fp); | |
138 | return (1); | |
139 | } | |
140 | ||
141 | img->xsize = cinfo.output_width; | |
142 | img->ysize = cinfo.output_height; | |
143 | ||
144 | if (cinfo.X_density > 0 && cinfo.Y_density > 0 && cinfo.density_unit > 0) | |
145 | { | |
146 | if (cinfo.density_unit == 1) | |
147 | { | |
148 | img->xppi = cinfo.X_density; | |
149 | img->yppi = cinfo.Y_density; | |
150 | } | |
151 | else | |
152 | { | |
153 | img->xppi = (int)((float)cinfo.X_density * 2.54); | |
154 | img->yppi = (int)((float)cinfo.Y_density * 2.54); | |
155 | } | |
156 | ||
157 | if (img->xppi == 0 || img->yppi == 0) | |
158 | { | |
159 | fprintf(stderr, "ERROR: Bad JPEG image resolution %dx%d PPI.\n", | |
160 | img->xppi, img->yppi); | |
161 | img->xppi = img->yppi = 128; | |
162 | } | |
163 | } | |
164 | ||
165 | fprintf(stderr, "DEBUG: JPEG image %dx%dx%d, %dx%d PPI\n", | |
166 | img->xsize, img->ysize, cinfo.output_components, | |
167 | img->xppi, img->yppi); | |
168 | ||
169 | cupsImageSetMaxTiles(img, 0); | |
170 | ||
171 | in = malloc(img->xsize * cinfo.output_components); | |
172 | out = malloc(img->xsize * cupsImageGetDepth(img)); | |
173 | ||
174 | jpeg_start_decompress(&cinfo); | |
175 | ||
176 | while (cinfo.output_scanline < cinfo.output_height) | |
177 | { | |
178 | jpeg_read_scanlines(&cinfo, (JSAMPROW *)&in, (JDIMENSION)1); | |
179 | ||
180 | if (psjpeg && cinfo.output_components == 4) | |
181 | { | |
182 | /* | |
183 | * Invert CMYK data from Photoshop... | |
184 | */ | |
185 | ||
186 | cups_ib_t *ptr; /* Pointer into buffer */ | |
187 | int i; /* Looping var */ | |
188 | ||
189 | ||
190 | for (ptr = in, i = img->xsize * 4; i > 0; i --, ptr ++) | |
191 | *ptr = 255 - *ptr; | |
192 | } | |
193 | ||
194 | if ((saturation != 100 || hue != 0) && cinfo.output_components == 3) | |
195 | cupsImageRGBAdjust(in, img->xsize, saturation, hue); | |
196 | ||
197 | if ((img->colorspace == CUPS_IMAGE_WHITE && cinfo.out_color_space == JCS_GRAYSCALE) || | |
ef416fc2 | 198 | (img->colorspace == CUPS_IMAGE_CMYK && cinfo.out_color_space == JCS_CMYK)) |
199 | { | |
200 | #ifdef DEBUG | |
201 | int i, j; | |
202 | cups_ib_t *ptr; | |
203 | ||
204 | ||
205 | fputs("DEBUG: Direct Data...\n", stderr); | |
206 | ||
207 | fputs("DEBUG:", stderr); | |
208 | ||
209 | for (i = 0, ptr = in; i < img->xsize; i ++) | |
210 | { | |
211 | putc(' ', stderr); | |
212 | for (j = 0; j < cinfo.output_components; j ++, ptr ++) | |
213 | fprintf(stderr, "%02X", *ptr & 255); | |
214 | } | |
215 | ||
216 | putc('\n', stderr); | |
217 | #endif /* DEBUG */ | |
218 | ||
219 | if (lut) | |
220 | cupsImageLut(in, img->xsize * cupsImageGetDepth(img), lut); | |
221 | ||
222 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, in); | |
223 | } | |
224 | else if (cinfo.out_color_space == JCS_GRAYSCALE) | |
225 | { | |
226 | switch (img->colorspace) | |
227 | { | |
228 | default : | |
229 | break; | |
230 | ||
231 | case CUPS_IMAGE_BLACK : | |
232 | cupsImageWhiteToBlack(in, out, img->xsize); | |
233 | break; | |
234 | case CUPS_IMAGE_RGB : | |
235 | cupsImageWhiteToRGB(in, out, img->xsize); | |
236 | break; | |
237 | case CUPS_IMAGE_CMY : | |
238 | cupsImageWhiteToCMY(in, out, img->xsize); | |
239 | break; | |
240 | case CUPS_IMAGE_CMYK : | |
241 | cupsImageWhiteToCMYK(in, out, img->xsize); | |
242 | break; | |
243 | } | |
244 | ||
245 | if (lut) | |
246 | cupsImageLut(out, img->xsize * cupsImageGetDepth(img), lut); | |
247 | ||
248 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, out); | |
249 | } | |
250 | else if (cinfo.out_color_space == JCS_RGB) | |
251 | { | |
252 | switch (img->colorspace) | |
253 | { | |
254 | default : | |
255 | break; | |
256 | ||
f301802f | 257 | case CUPS_IMAGE_RGB : |
258 | cupsImageRGBToRGB(in, out, img->xsize); | |
259 | break; | |
ef416fc2 | 260 | case CUPS_IMAGE_WHITE : |
261 | cupsImageRGBToWhite(in, out, img->xsize); | |
262 | break; | |
263 | case CUPS_IMAGE_BLACK : | |
264 | cupsImageRGBToBlack(in, out, img->xsize); | |
265 | break; | |
266 | case CUPS_IMAGE_CMY : | |
267 | cupsImageRGBToCMY(in, out, img->xsize); | |
268 | break; | |
269 | case CUPS_IMAGE_CMYK : | |
270 | cupsImageRGBToCMYK(in, out, img->xsize); | |
271 | break; | |
272 | } | |
273 | ||
274 | if (lut) | |
275 | cupsImageLut(out, img->xsize * cupsImageGetDepth(img), lut); | |
276 | ||
277 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, out); | |
278 | } | |
279 | else /* JCS_CMYK */ | |
280 | { | |
281 | fputs("DEBUG: JCS_CMYK\n", stderr); | |
282 | ||
283 | switch (img->colorspace) | |
284 | { | |
285 | default : | |
286 | break; | |
287 | ||
288 | case CUPS_IMAGE_WHITE : | |
289 | cupsImageCMYKToWhite(in, out, img->xsize); | |
290 | break; | |
291 | case CUPS_IMAGE_BLACK : | |
292 | cupsImageCMYKToBlack(in, out, img->xsize); | |
293 | break; | |
294 | case CUPS_IMAGE_CMY : | |
295 | cupsImageCMYKToCMY(in, out, img->xsize); | |
296 | break; | |
297 | case CUPS_IMAGE_RGB : | |
298 | cupsImageCMYKToRGB(in, out, img->xsize); | |
299 | break; | |
300 | } | |
301 | ||
302 | if (lut) | |
303 | cupsImageLut(out, img->xsize * cupsImageGetDepth(img), lut); | |
304 | ||
305 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, out); | |
306 | } | |
307 | } | |
308 | ||
309 | free(in); | |
310 | free(out); | |
311 | ||
312 | jpeg_finish_decompress(&cinfo); | |
313 | jpeg_destroy_decompress(&cinfo); | |
314 | ||
315 | fclose(fp); | |
316 | ||
317 | return (0); | |
318 | } | |
319 | #endif /* HAVE_LIBJPEG */ | |
320 | ||
321 | ||
322 | /* | |
7a6a01dd | 323 | * End of "$Id$". |
ef416fc2 | 324 | */ |