File: image-pix.c

package info (click to toggle)
cups 1.4.4-7+squeeze10
  • links: PTS, VCS
  • area: main
  • in suites: squeeze-lts
  • size: 25,548 kB
  • ctags: 9,583
  • sloc: ansic: 138,214; sh: 37,926; cpp: 25,469; makefile: 3,285; perl: 190; python: 127; php: 28
file content (240 lines) | stat: -rw-r--r-- 5,387 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
/*
 * "$Id: image-pix.c 7221 2008-01-16 22:20:08Z mike $"
 *
 *   Alias PIX image routines for the Common UNIX Printing System (CUPS).
 *
 *   Copyright 2007-2008 by Apple Inc.
 *   Copyright 1993-2007 by Easy Software Products.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Apple Inc. 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
 *   file is missing or damaged, see the license at "http://www.cups.org/".
 *
 *   This file is subject to the Apple OS-Developed Software exception.
 *
 * Contents:
 *
 *   _cupsImageReadPIX() - Read a PIX image file.
 *   read_short()        - Read a 16-bit integer.
 */

/*
 * Include necessary headers...
 */

#include "image-private.h"


/*
 * Local functions...
 */

static short	read_short(FILE *fp);


/*
 * '_cupsImageReadPIX()' - Read a PIX image file.
 */

int					/* O - Read status */
_cupsImageReadPIX(
    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 */
{
  short		width,			/* Width of image */
		height,			/* Height of image */
		depth;			/* Depth of image (bits) */
  int		count,			/* Repetition count */
		bpp,			/* Bytes per pixel */
		x, y;			/* Looping vars */
  cups_ib_t	r, g, b;		/* Red, green/gray, blue values */
  cups_ib_t	*in,			/* Input pixels */
		*out,			/* Output pixels */
		*ptr;			/* Pointer into pixels */


 /*
  * Get the image dimensions and setup the image...
  */

  width  = read_short(fp);
  height = read_short(fp);
  read_short(fp);
  read_short(fp);
  depth  = read_short(fp);

 /*
  * Check the dimensions of the image.  Since the short values used for the
  * width and height cannot exceed CUPS_IMAGE_MAX_WIDTH or
  * CUPS_IMAGE_MAX_HEIGHT, we just need to verify they are positive integers.
  */

  if (width <= 0 || height <= 0 ||
      (depth != 8 && depth != 24))
  {
    fprintf(stderr, "DEBUG: Bad PIX image dimensions %dx%dx%d\n",
            width, height, depth);
    fclose(fp);
    return (1);
  }

  if (depth == 8)
    img->colorspace = secondary;
  else
    img->colorspace = (primary == CUPS_IMAGE_RGB_CMYK) ? CUPS_IMAGE_RGB : primary;

  img->xsize = width;
  img->ysize = height;

  cupsImageSetMaxTiles(img, 0);

  bpp = cupsImageGetDepth(img);

  if ((in = malloc(img->xsize * (depth / 8))) == NULL)
  {
    fputs("DEBUG: Unable to allocate memory!\n", stderr);
    fclose(fp);
    return (1);
  }

  if ((out = malloc(img->xsize * bpp)) == NULL)
  {
    fputs("DEBUG: Unable to allocate memory!\n", stderr);
    fclose(fp);
    free(in);
    return (1);
  }

 /*
  * Read the image data...
  */

  if (depth == 8)
  {
    for (count = 0, y = 0, g = 0; y < img->ysize; y ++)
    {
      if (img->colorspace == CUPS_IMAGE_WHITE)
        ptr = out;
      else
        ptr = in;

      for (x = img->xsize; x > 0; x --, count --)
      {
        if (count == 0)
	{
          count = getc(fp);
	  g     = getc(fp);
	}

        *ptr++ = g;
      }

      if (img->colorspace != CUPS_IMAGE_WHITE)
	switch (img->colorspace)
	{
	  default :
	      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
  {
    for (count = 0, y = 0, r = 0, g = 0, b = 0; y < img->ysize; y ++)
    {
      ptr = in;

      for (x = img->xsize; x > 0; x --, count --)
      {
        if (count == 0)
	{
          count = getc(fp);
	  b     = getc(fp);
	  g     = getc(fp);
	  r     = getc(fp);
	}

        *ptr++ = r;
        *ptr++ = g;
        *ptr++ = b;
      }

      if (saturation != 100 || hue != 0)
	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 :
	    cupsImageRGBToWhite(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);
    }
  }

  fclose(fp);
  free(in);
  free(out);

  return (0);
}


/*
 * 'read_short()' - Read a 16-bit integer.
 */

static short				/* O - Value from file */
read_short(FILE *fp)			/* I - File to read from */
{
  int	ch;				/* Character from file */


  ch = getc(fp);
  return ((ch << 8) | getc(fp));
}


/*
 * End of "$Id: image-pix.c 7221 2008-01-16 22:20:08Z mike $".
 */