2 * "$Id: image-sgi.c 9771 2011-05-12 05:21:56Z mike $"
4 * SGI image file routines for CUPS.
6 * Copyright 2007-2011 by Apple Inc.
7 * Copyright 1993-2007 by Easy Software Products.
9 * These coded instructions, statements, and computer programs are the
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/".
15 * This file is subject to the Apple OS-Developed Software exception.
19 * _cupsImageReadSGI() - Read a SGI image file.
23 * Include necessary headers...
26 #include "image-private.h"
27 #include "image-sgi.h"
31 * '_cupsImageReadSGI()' - Read a SGI image file.
34 int /* O - Read status */
36 cups_image_t *img, /* IO - cupsImage */
37 FILE *fp, /* I - cupsImage file */
38 cups_icspace_t primary, /* I - Primary choice for colorspace */
39 cups_icspace_t secondary, /* I - Secondary choice for colorspace */
40 int saturation, /* I - Color saturation (%) */
41 int hue, /* I - Color hue (degrees) */
42 const cups_ib_t *lut) /* I - Lookup table for gamma/brightness */
44 int i, y; /* Looping vars */
45 int bpp; /* Bytes per pixel */
46 sgi_t *sgip; /* SGI image file */
47 cups_ib_t *in, /* Input pixels */
48 *inptr, /* Current input pixel */
49 *out; /* Output pixels */
50 unsigned short *rows[4], /* Row pointers for image data */
59 * Setup the SGI file...
62 sgip = sgiOpenFile(fp, SGI_READ, 0, 0, 0, 0, 0);
65 * Get the image dimensions and load the output image...
69 * Check the image dimensions; since xsize and ysize are unsigned shorts,
70 * just check if they are 0 since they can't exceed CUPS_IMAGE_MAX_WIDTH or
71 * CUPS_IMAGE_MAX_HEIGHT...
74 if (sgip->xsize == 0 || sgip->ysize == 0 ||
75 sgip->zsize == 0 || sgip->zsize > 4)
77 fprintf(stderr, "DEBUG: Bad SGI image dimensions %ux%ux%u!\n",
78 sgip->xsize, sgip->ysize, sgip->zsize);
84 img->colorspace = secondary;
86 img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary;
88 img->xsize = sgip->xsize;
89 img->ysize = sgip->ysize;
91 cupsImageSetMaxTiles(img, 0);
93 bpp = cupsImageGetDepth(img);
95 if ((in = malloc(img->xsize * sgip->zsize)) == NULL)
97 fputs("DEBUG: Unable to allocate memory!\n", stderr);
102 if ((out = malloc(img->xsize * bpp)) == NULL)
104 fputs("DEBUG: Unable to allocate memory!\n", stderr);
110 if ((rows[0] = calloc(img->xsize * sgip->zsize,
111 sizeof(unsigned short))) == NULL)
113 fputs("DEBUG: Unable to allocate memory!\n", stderr);
120 for (i = 1; i < sgip->zsize; i ++)
121 rows[i] = rows[0] + i * img->xsize;
124 * Read the SGI image file...
127 for (y = 0; y < img->ysize; y ++)
129 for (i = 0; i < sgip->zsize; i ++)
130 sgiGetRow(sgip, rows[i], img->ysize - 1 - y, i);
136 for (i = img->xsize - 1, gray = rows[0], inptr = in;
143 for (i = img->xsize - 1, gray = rows[0], inptr = in;
147 *inptr++ = (*gray++) / 256 + 128;
152 for (i = img->xsize - 1, gray = rows[0], alpha = rows[1], inptr = in;
156 *inptr++ = (*gray++) * (*alpha++) / 255;
159 for (i = img->xsize - 1, gray = rows[0], alpha = rows[1], inptr = in;
163 *inptr++ = ((*gray++) / 256 + 128) * (*alpha++) / 32767;
168 for (i = img->xsize - 1, red = rows[0], green = rows[1],
169 blue = rows[2], inptr = in;
178 for (i = img->xsize - 1, red = rows[0], green = rows[1],
179 blue = rows[2], inptr = in;
183 *inptr++ = (*red++) / 256 + 128;
184 *inptr++ = (*green++) / 256 + 128;
185 *inptr++ = (*blue++) / 256 + 128;
190 for (i = img->xsize - 1, red = rows[0], green = rows[1],
191 blue = rows[2], alpha = rows[3], inptr = in;
195 *inptr++ = (*red++) * (*alpha) / 255;
196 *inptr++ = (*green++) * (*alpha) / 255;
197 *inptr++ = (*blue++) * (*alpha++) / 255;
200 for (i = img->xsize - 1, red = rows[0], green = rows[1],
201 blue = rows[2], alpha = rows[3], inptr = in;
205 *inptr++ = ((*red++) / 256 + 128) * (*alpha) / 32767;
206 *inptr++ = ((*green++) / 256 + 128) * (*alpha) / 32767;
207 *inptr++ = ((*blue++) / 256 + 128) * (*alpha++) / 32767;
214 if (img->colorspace == CUPS_IMAGE_WHITE)
217 cupsImageLut(in, img->xsize, lut);
219 _cupsImagePutRow(img, 0, y, img->xsize, in);
223 switch (img->colorspace)
228 case CUPS_IMAGE_RGB :
229 case CUPS_IMAGE_RGB_CMYK :
230 cupsImageWhiteToRGB(in, out, img->xsize);
232 case CUPS_IMAGE_BLACK :
233 cupsImageWhiteToBlack(in, out, img->xsize);
235 case CUPS_IMAGE_CMY :
236 cupsImageWhiteToCMY(in, out, img->xsize);
238 case CUPS_IMAGE_CMYK :
239 cupsImageWhiteToCMYK(in, out, img->xsize);
244 cupsImageLut(out, img->xsize * bpp, lut);
246 _cupsImagePutRow(img, 0, y, img->xsize, out);
251 if ((saturation != 100 || hue != 0) && bpp > 1)
252 cupsImageRGBAdjust(in, img->xsize, saturation, hue);
254 switch (img->colorspace)
259 case CUPS_IMAGE_WHITE :
260 cupsImageRGBToWhite(in, out, img->xsize);
262 case CUPS_IMAGE_RGB :
263 cupsImageRGBToRGB(in, out, img->xsize);
265 case CUPS_IMAGE_BLACK :
266 cupsImageRGBToBlack(in, out, img->xsize);
268 case CUPS_IMAGE_CMY :
269 cupsImageRGBToCMY(in, out, img->xsize);
271 case CUPS_IMAGE_CMYK :
272 cupsImageRGBToCMYK(in, out, img->xsize);
277 cupsImageLut(out, img->xsize * bpp, lut);
279 _cupsImagePutRow(img, 0, y, img->xsize, out);
294 * End of "$Id: image-sgi.c 9771 2011-05-12 05:21:56Z mike $".