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ef416fc2 | 1 | /* |
75bd9771 | 2 | * "$Id: image-jpeg.c 7355 2008-02-28 20:49:40Z mike $" |
ef416fc2 | 3 | * |
4 | * JPEG image routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
bc44d920 | 6 | * Copyright 2007 by Apple Inc. |
c0e1af83 | 7 | * Copyright 1993-2007 by Easy Software Products. |
ef416fc2 | 8 | * |
9 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 10 | * property of Apple Inc. and are protected by Federal copyright |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 14 | * |
15 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | * | |
17 | * Contents: | |
18 | * | |
19 | * _cupsImageReadJPEG() - Read a JPEG image file. | |
20 | */ | |
21 | ||
22 | /* | |
23 | * Include necessary headers... | |
24 | */ | |
25 | ||
26 | #include "image-private.h" | |
27 | ||
28 | #ifdef HAVE_LIBJPEG | |
29 | # include <jpeglib.h> /* JPEG/JFIF image definitions */ | |
30 | ||
31 | ||
32 | /* | |
33 | * '_cupsImageReadJPEG()' - Read a JPEG image file. | |
34 | */ | |
35 | ||
36 | int /* O - Read status */ | |
37 | _cupsImageReadJPEG( | |
38 | cups_image_t *img, /* IO - cupsImage */ | |
39 | FILE *fp, /* I - cupsImage file */ | |
40 | cups_icspace_t primary, /* I - Primary choice for colorspace */ | |
41 | cups_icspace_t secondary, /* I - Secondary choice for colorspace */ | |
42 | int saturation, /* I - Color saturation (%) */ | |
43 | int hue, /* I - Color hue (degrees) */ | |
44 | const cups_ib_t *lut) /* I - Lookup table for gamma/brightness */ | |
45 | { | |
46 | struct jpeg_decompress_struct cinfo; /* Decompressor info */ | |
47 | struct jpeg_error_mgr jerr; /* Error handler info */ | |
48 | cups_ib_t *in, /* Input pixels */ | |
49 | *out; /* Output pixels */ | |
568fa3fa MS |
50 | jpeg_saved_marker_ptr marker; /* Pointer to marker data */ |
51 | int psjpeg = 0; /* Non-zero if Photoshop CMYK JPEG */ | |
ef416fc2 | 52 | static const char *cspaces[] = |
53 | { /* JPEG colorspaces... */ | |
54 | "JCS_UNKNOWN", | |
55 | "JCS_GRAYSCALE", | |
56 | "JCS_RGB", | |
57 | "JCS_YCbCr", | |
58 | "JCS_CMYK", | |
59 | "JCS_YCCK" | |
60 | }; | |
61 | ||
62 | ||
ef416fc2 | 63 | /* |
64 | * Read the JPEG header... | |
65 | */ | |
66 | ||
67 | cinfo.err = jpeg_std_error(&jerr); | |
68 | jpeg_create_decompress(&cinfo); | |
568fa3fa | 69 | jpeg_save_markers(&cinfo, JPEG_APP0 + 14, 0xffff); /* Adobe JPEG */ |
ef416fc2 | 70 | jpeg_stdio_src(&cinfo, fp); |
71 | jpeg_read_header(&cinfo, 1); | |
72 | ||
568fa3fa MS |
73 | /* |
74 | * Parse any Adobe APPE data embedded in the JPEG file. Since Adobe doesn't | |
75 | * bother following standards, we have to invert the CMYK JPEG data written by | |
76 | * Adobe apps... | |
77 | */ | |
78 | ||
79 | for (marker = cinfo.marker_list; marker; marker = marker->next) | |
80 | if (marker->marker == (JPEG_APP0 + 14) && marker->data_length >= 12 && | |
81 | !memcmp(marker->data, "Adobe", 5) && marker->data[11] == 2) | |
82 | { | |
83 | fputs("DEBUG: Adobe CMYK JPEG detected (inverting color values)\n", | |
84 | stderr); | |
85 | psjpeg = 1; | |
86 | } | |
87 | ||
ef416fc2 | 88 | cinfo.quantize_colors = 0; |
89 | ||
90 | fprintf(stderr, "DEBUG: num_components = %d\n", cinfo.num_components); | |
91 | fprintf(stderr, "DEBUG: jpeg_color_space = %s\n", | |
92 | cspaces[cinfo.jpeg_color_space]); | |
93 | ||
94 | if (cinfo.num_components == 1) | |
95 | { | |
96 | fputs("DEBUG: Converting image to grayscale...\n", stderr); | |
97 | ||
98 | cinfo.out_color_space = JCS_GRAYSCALE; | |
99 | cinfo.out_color_components = 1; | |
100 | cinfo.output_components = 1; | |
101 | ||
102 | img->colorspace = secondary; | |
103 | } | |
104 | else if (cinfo.num_components == 4) | |
105 | { | |
106 | fputs("DEBUG: Converting image to CMYK...\n", stderr); | |
107 | ||
108 | cinfo.out_color_space = JCS_CMYK; | |
109 | cinfo.out_color_components = 4; | |
110 | cinfo.output_components = 4; | |
111 | ||
112 | img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_CMYK : primary; | |
113 | } | |
114 | else | |
115 | { | |
116 | fputs("DEBUG: Converting image to RGB...\n", stderr); | |
117 | ||
118 | cinfo.out_color_space = JCS_RGB; | |
119 | cinfo.out_color_components = 3; | |
120 | cinfo.output_components = 3; | |
121 | ||
122 | img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary; | |
123 | } | |
124 | ||
125 | jpeg_calc_output_dimensions(&cinfo); | |
126 | ||
127 | if (cinfo.output_width <= 0 || cinfo.output_width > CUPS_IMAGE_MAX_WIDTH || | |
128 | cinfo.output_height <= 0 || cinfo.output_height > CUPS_IMAGE_MAX_HEIGHT) | |
129 | { | |
c0e1af83 | 130 | fprintf(stderr, "DEBUG: Bad JPEG dimensions %dx%d!\n", |
ef416fc2 | 131 | cinfo.output_width, cinfo.output_height); |
132 | ||
133 | jpeg_destroy_decompress(&cinfo); | |
134 | ||
135 | fclose(fp); | |
136 | return (1); | |
137 | } | |
138 | ||
139 | img->xsize = cinfo.output_width; | |
140 | img->ysize = cinfo.output_height; | |
141 | ||
142 | if (cinfo.X_density > 0 && cinfo.Y_density > 0 && cinfo.density_unit > 0) | |
143 | { | |
144 | if (cinfo.density_unit == 1) | |
145 | { | |
146 | img->xppi = cinfo.X_density; | |
147 | img->yppi = cinfo.Y_density; | |
148 | } | |
149 | else | |
150 | { | |
151 | img->xppi = (int)((float)cinfo.X_density * 2.54); | |
152 | img->yppi = (int)((float)cinfo.Y_density * 2.54); | |
153 | } | |
154 | ||
155 | if (img->xppi == 0 || img->yppi == 0) | |
156 | { | |
c0e1af83 | 157 | fprintf(stderr, "DEBUG: Bad JPEG image resolution %dx%d PPI.\n", |
ef416fc2 | 158 | img->xppi, img->yppi); |
159 | img->xppi = img->yppi = 128; | |
160 | } | |
161 | } | |
162 | ||
163 | fprintf(stderr, "DEBUG: JPEG image %dx%dx%d, %dx%d PPI\n", | |
164 | img->xsize, img->ysize, cinfo.output_components, | |
165 | img->xppi, img->yppi); | |
166 | ||
167 | cupsImageSetMaxTiles(img, 0); | |
168 | ||
169 | in = malloc(img->xsize * cinfo.output_components); | |
170 | out = malloc(img->xsize * cupsImageGetDepth(img)); | |
171 | ||
172 | jpeg_start_decompress(&cinfo); | |
173 | ||
174 | while (cinfo.output_scanline < cinfo.output_height) | |
175 | { | |
176 | jpeg_read_scanlines(&cinfo, (JSAMPROW *)&in, (JDIMENSION)1); | |
177 | ||
178 | if (psjpeg && cinfo.output_components == 4) | |
179 | { | |
180 | /* | |
181 | * Invert CMYK data from Photoshop... | |
182 | */ | |
183 | ||
184 | cups_ib_t *ptr; /* Pointer into buffer */ | |
185 | int i; /* Looping var */ | |
186 | ||
187 | ||
188 | for (ptr = in, i = img->xsize * 4; i > 0; i --, ptr ++) | |
189 | *ptr = 255 - *ptr; | |
190 | } | |
191 | ||
192 | if ((saturation != 100 || hue != 0) && cinfo.output_components == 3) | |
193 | cupsImageRGBAdjust(in, img->xsize, saturation, hue); | |
194 | ||
195 | if ((img->colorspace == CUPS_IMAGE_WHITE && cinfo.out_color_space == JCS_GRAYSCALE) || | |
ef416fc2 | 196 | (img->colorspace == CUPS_IMAGE_CMYK && cinfo.out_color_space == JCS_CMYK)) |
197 | { | |
198 | #ifdef DEBUG | |
199 | int i, j; | |
200 | cups_ib_t *ptr; | |
201 | ||
202 | ||
203 | fputs("DEBUG: Direct Data...\n", stderr); | |
204 | ||
205 | fputs("DEBUG:", stderr); | |
206 | ||
207 | for (i = 0, ptr = in; i < img->xsize; i ++) | |
208 | { | |
209 | putc(' ', stderr); | |
210 | for (j = 0; j < cinfo.output_components; j ++, ptr ++) | |
211 | fprintf(stderr, "%02X", *ptr & 255); | |
212 | } | |
213 | ||
214 | putc('\n', stderr); | |
215 | #endif /* DEBUG */ | |
216 | ||
217 | if (lut) | |
218 | cupsImageLut(in, img->xsize * cupsImageGetDepth(img), lut); | |
219 | ||
220 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, in); | |
221 | } | |
222 | else if (cinfo.out_color_space == JCS_GRAYSCALE) | |
223 | { | |
224 | switch (img->colorspace) | |
225 | { | |
226 | default : | |
227 | break; | |
228 | ||
229 | case CUPS_IMAGE_BLACK : | |
230 | cupsImageWhiteToBlack(in, out, img->xsize); | |
231 | break; | |
232 | case CUPS_IMAGE_RGB : | |
233 | cupsImageWhiteToRGB(in, out, img->xsize); | |
234 | break; | |
235 | case CUPS_IMAGE_CMY : | |
236 | cupsImageWhiteToCMY(in, out, img->xsize); | |
237 | break; | |
238 | case CUPS_IMAGE_CMYK : | |
239 | cupsImageWhiteToCMYK(in, out, img->xsize); | |
240 | break; | |
241 | } | |
242 | ||
243 | if (lut) | |
244 | cupsImageLut(out, img->xsize * cupsImageGetDepth(img), lut); | |
245 | ||
246 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, out); | |
247 | } | |
248 | else if (cinfo.out_color_space == JCS_RGB) | |
249 | { | |
250 | switch (img->colorspace) | |
251 | { | |
252 | default : | |
253 | break; | |
254 | ||
f301802f | 255 | case CUPS_IMAGE_RGB : |
256 | cupsImageRGBToRGB(in, out, img->xsize); | |
257 | break; | |
ef416fc2 | 258 | case CUPS_IMAGE_WHITE : |
259 | cupsImageRGBToWhite(in, out, img->xsize); | |
260 | break; | |
261 | case CUPS_IMAGE_BLACK : | |
262 | cupsImageRGBToBlack(in, out, img->xsize); | |
263 | break; | |
264 | case CUPS_IMAGE_CMY : | |
265 | cupsImageRGBToCMY(in, out, img->xsize); | |
266 | break; | |
267 | case CUPS_IMAGE_CMYK : | |
268 | cupsImageRGBToCMYK(in, out, img->xsize); | |
269 | break; | |
270 | } | |
271 | ||
272 | if (lut) | |
273 | cupsImageLut(out, img->xsize * cupsImageGetDepth(img), lut); | |
274 | ||
275 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, out); | |
276 | } | |
277 | else /* JCS_CMYK */ | |
278 | { | |
279 | fputs("DEBUG: JCS_CMYK\n", stderr); | |
280 | ||
281 | switch (img->colorspace) | |
282 | { | |
283 | default : | |
284 | break; | |
285 | ||
286 | case CUPS_IMAGE_WHITE : | |
287 | cupsImageCMYKToWhite(in, out, img->xsize); | |
288 | break; | |
289 | case CUPS_IMAGE_BLACK : | |
290 | cupsImageCMYKToBlack(in, out, img->xsize); | |
291 | break; | |
292 | case CUPS_IMAGE_CMY : | |
293 | cupsImageCMYKToCMY(in, out, img->xsize); | |
294 | break; | |
295 | case CUPS_IMAGE_RGB : | |
296 | cupsImageCMYKToRGB(in, out, img->xsize); | |
297 | break; | |
298 | } | |
299 | ||
300 | if (lut) | |
301 | cupsImageLut(out, img->xsize * cupsImageGetDepth(img), lut); | |
302 | ||
303 | _cupsImagePutRow(img, 0, cinfo.output_scanline - 1, img->xsize, out); | |
304 | } | |
305 | } | |
306 | ||
307 | free(in); | |
308 | free(out); | |
309 | ||
310 | jpeg_finish_decompress(&cinfo); | |
311 | jpeg_destroy_decompress(&cinfo); | |
312 | ||
313 | fclose(fp); | |
314 | ||
315 | return (0); | |
316 | } | |
317 | #endif /* HAVE_LIBJPEG */ | |
318 | ||
319 | ||
320 | /* | |
75bd9771 | 321 | * End of "$Id: image-jpeg.c 7355 2008-02-28 20:49:40Z mike $". |
ef416fc2 | 322 | */ |