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/*
* "$Id: image-sgi.c 177 2006-06-21 00:20:03Z jlovell $"
*
* SGI image file routines for the Common UNIX Printing System (CUPS).
*
* Copyright 1993-2006 by Easy Software Products.
*
* These coded instructions, statements, and computer programs are the
* property of Easy Software Products and are protected by Federal
* copyright law. Distribution and use rights are outlined in the file
* "LICENSE.txt" which should have been included with this file. If this
* file is missing or damaged please contact Easy Software Products
* at:
*
* Attn: CUPS Licensing Information
* Easy Software Products
* 44141 Airport View Drive, Suite 204
* Hollywood, Maryland 20636 USA
*
* Voice: (301) 373-9600
* EMail: cups-info@cups.org
* WWW: http://www.cups.org
*
* This file is subject to the Apple OS-Developed Software exception.
*
* Contents:
*
* _cupsImageReadSGI() - Read a SGI image file.
*/
/*
* Include necessary headers...
*/
#include "image-private.h"
#include "image-sgi.h"
/*
* '_cupsImageReadSGI()' - Read a SGI image file.
*/
int /* O - Read status */
_cupsImageReadSGI(
cups_image_t *img, /* IO - cupsImage */
FILE *fp, /* I - cupsImage file */
cups_icspace_t primary, /* I - Primary choice for colorspace */
cups_icspace_t secondary, /* I - Secondary choice for colorspace */
int saturation, /* I - Color saturation (%) */
int hue, /* I - Color hue (degrees) */
const cups_ib_t *lut) /* I - Lookup table for gamma/brightness */
{
int i, y; /* Looping vars */
int bpp; /* Bytes per pixel */
sgi_t *sgip; /* SGI image file */
cups_ib_t *in, /* Input pixels */
*inptr, /* Current input pixel */
*out; /* Output pixels */
unsigned short *rows[4], /* Row pointers for image data */
*red,
*green,
*blue,
*gray,
*alpha;
/*
* Setup the SGI file...
*/
sgip = sgiOpenFile(fp, SGI_READ, 0, 0, 0, 0, 0);
/*
* Get the image dimensions and load the output image...
*/
/*
* Check the image dimensions; since xsize and ysize are unsigned shorts,
* just check if they are 0 since they can't exceed CUPS_IMAGE_MAX_WIDTH or
* CUPS_IMAGE_MAX_HEIGHT...
*/
if (sgip->xsize == 0 || sgip->ysize == 0 ||
sgip->zsize == 0 || sgip->zsize > 4)
{
fprintf(stderr, "ERROR: Bad SGI image dimensions %ux%ux%u!\n",
sgip->xsize, sgip->ysize, sgip->zsize);
sgiClose(sgip);
fclose(fp);
return (1);
}
if (sgip->zsize < 3)
img->colorspace = secondary;
else
img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary;
img->xsize = sgip->xsize;
img->ysize = sgip->ysize;
cupsImageSetMaxTiles(img, 0);
bpp = cupsImageGetDepth(img);
in = malloc(img->xsize * sgip->zsize);
out = malloc(img->xsize * bpp);
rows[0] = calloc(img->xsize * sgip->zsize, sizeof(unsigned short));
for (i = 1; i < sgip->zsize; i ++)
rows[i] = rows[0] + i * img->xsize;
/*
* Read the SGI image file...
*/
for (y = 0; y < img->ysize; y ++)
{
for (i = 0; i < sgip->zsize; i ++)
sgiGetRow(sgip, rows[i], img->ysize - 1 - y, i);
switch (sgip->zsize)
{
case 1 :
if (sgip->bpp == 1)
for (i = img->xsize - 1, gray = rows[0], inptr = in;
i >= 0;
i --)
{
*inptr++ = *gray++;
}
else
for (i = img->xsize - 1, gray = rows[0], inptr = in;
i >= 0;
i --)
{
*inptr++ = (*gray++) / 256 + 128;
}
break;
case 2 :
if (sgip->bpp == 1)
for (i = img->xsize - 1, gray = rows[0], alpha = rows[1], inptr = in;
i >= 0;
i --)
{
*inptr++ = (*gray++) * (*alpha++) / 255;
}
else
for (i = img->xsize - 1, gray = rows[0], alpha = rows[1], inptr = in;
i >= 0;
i --)
{
*inptr++ = ((*gray++) / 256 + 128) * (*alpha++) / 32767;
}
break;
case 3 :
if (sgip->bpp == 1)
for (i = img->xsize - 1, red = rows[0], green = rows[1],
blue = rows[2], inptr = in;
i >= 0;
i --)
{
*inptr++ = *red++;
*inptr++ = *green++;
*inptr++ = *blue++;
}
else
for (i = img->xsize - 1, red = rows[0], green = rows[1],
blue = rows[2], inptr = in;
i >= 0;
i --)
{
*inptr++ = (*red++) / 256 + 128;
*inptr++ = (*green++) / 256 + 128;
*inptr++ = (*blue++) / 256 + 128;
}
break;
case 4 :
if (sgip->bpp == 1)
for (i = img->xsize - 1, red = rows[0], green = rows[1],
blue = rows[2], alpha = rows[3], inptr = in;
i >= 0;
i --)
{
*inptr++ = (*red++) * (*alpha) / 255;
*inptr++ = (*green++) * (*alpha) / 255;
*inptr++ = (*blue++) * (*alpha++) / 255;
}
else
for (i = img->xsize - 1, red = rows[0], green = rows[1],
blue = rows[2], alpha = rows[3], inptr = in;
i >= 0;
i --)
{
*inptr++ = ((*red++) / 256 + 128) * (*alpha) / 32767;
*inptr++ = ((*green++) / 256 + 128) * (*alpha) / 32767;
*inptr++ = ((*blue++) / 256 + 128) * (*alpha++) / 32767;
}
break;
}
if (sgip->zsize < 3)
{
if (img->colorspace == CUPS_IMAGE_WHITE)
{
if (lut)
cupsImageLut(in, img->xsize, lut);
_cupsImagePutRow(img, 0, y, img->xsize, in);
}
else
{
switch (img->colorspace)
{
default :
break;
case CUPS_IMAGE_RGB :
case CUPS_IMAGE_RGB_CMYK :
cupsImageWhiteToRGB(in, out, img->xsize);
break;
case CUPS_IMAGE_BLACK :
cupsImageWhiteToBlack(in, out, img->xsize);
break;
case CUPS_IMAGE_CMY :
cupsImageWhiteToCMY(in, out, img->xsize);
break;
case CUPS_IMAGE_CMYK :
cupsImageWhiteToCMYK(in, out, img->xsize);
break;
}
if (lut)
cupsImageLut(out, img->xsize * bpp, lut);
_cupsImagePutRow(img, 0, y, img->xsize, out);
}
}
else
{
if ((saturation != 100 || hue != 0) && bpp > 1)
cupsImageRGBAdjust(in, img->xsize, saturation, hue);
switch (img->colorspace)
{
default :
break;
case CUPS_IMAGE_WHITE :
cupsImageRGBToWhite(in, out, img->xsize);
break;
case CUPS_IMAGE_RGB :
cupsImageRGBToRGB(in, out, img->xsize);
break;
case CUPS_IMAGE_BLACK :
cupsImageRGBToBlack(in, out, img->xsize);
break;
case CUPS_IMAGE_CMY :
cupsImageRGBToCMY(in, out, img->xsize);
break;
case CUPS_IMAGE_CMYK :
cupsImageRGBToCMYK(in, out, img->xsize);
break;
}
if (lut)
cupsImageLut(out, img->xsize * bpp, lut);
_cupsImagePutRow(img, 0, y, img->xsize, out);
}
}
free(in);
free(out);
free(rows[0]);
sgiClose(sgip);
return (0);
}
/*
* End of "$Id: image-sgi.c 177 2006-06-21 00:20:03Z jlovell $".
*/
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