/src/libjpeg-turbo.3.1.x/src/wrppm.c

Source
/*
 * wrppm.c
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1991-1996, Thomas G. Lane.
 * Modified 2009 by Guido Vollbeding.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2017, 2019-2020, 2022, 2024, 2026, D. R. Commander.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file contains routines to write output images in PPM/PGM format.
 * The extended 2-byte-per-sample raw PPM/PGM formats are supported.
 * The PBMPLUS library is NOT required to compile this software
 * (but it is highly useful as a set of PPM image manipulation programs).
 *
 * These routines may need modification for non-Unix environments or
 * specialized applications.  As they stand, they assume output to
 * an ordinary stdio stream.
 */

#include "cmyk.h"
#include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */

#if defined(PPM_SUPPORTED) && \
    (BITS_IN_JSAMPLE != 16 || defined(D_LOSSLESS_SUPPORTED))


/*
 * For 12-bit JPEG data, we either downscale the values to 8 bits
 * (to write standard byte-per-sample PPM/PGM files), or output
 * nonstandard word-per-sample PPM/PGM files.  Downscaling is done
 * if PPM_NORAWWORD is defined (this can be done in the Makefile
 * or in jconfig.h).
 * (When the core library supports data precision reduction, a cleaner
 * implementation will be to ask for that instead.)
 */

#if BITS_IN_JSAMPLE == 8
#define PUTPPMSAMPLE(ptr, v)  *ptr++ = (char)(v)
#define BYTESPERSAMPLE  1
#define PPM_MAXVAL  ((1 << cinfo->data_precision) - 1)
#else
#ifdef PPM_NORAWWORD
#define PUTPPMSAMPLE(ptr, v) \
  *ptr++ = (char)((v) >> (cinfo->data_precision - 8))
#define BYTESPERSAMPLE  1
#define PPM_MAXVAL  255
#else
/* The word-per-sample format always puts the MSB first. */
#define PUTPPMSAMPLE(ptr, v) { \
  register int val_ = v; \
  *ptr++ = (char)((val_ >> 8) & 0xFF); \
  *ptr++ = (char)(val_ & 0xFF); \
}
#define BYTESPERSAMPLE  2
#define PPM_MAXVAL  ((1 << cinfo->data_precision) - 1)
#endif
#endif


/*
 * When _JSAMPLE is the same size as char, we can just fwrite() the
 * decompressed data to the PPM or PGM file.
 */


/* Private version of data destination object */

typedef struct {
  struct djpeg_dest_struct pub; /* public fields */

  /* Usually these two pointers point to the same place: */
  char *iobuffer;               /* fwrite's I/O buffer */
  _JSAMPROW pixrow;             /* decompressor output buffer */
  size_t buffer_width;          /* width of I/O buffer */
  JDIMENSION samples_per_row;   /* _JSAMPLEs per output row */
} ppm_dest_struct;

typedef ppm_dest_struct *ppm_dest_ptr;


#if BITS_IN_JSAMPLE == 8

/*
 * Write some pixel data.
 * In this module rows_supplied will always be 1.
 *
 * put_pixel_rows handles the "normal" 8-bit case where the decompressor
 * output buffer is physically the same as the fwrite buffer.
 */

METHODDEF(void)
put_pixel_rows(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
               JDIMENSION rows_supplied)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;

  fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
}

#endif


/*
 * This code is used when we have to copy the data and apply a pixel
 * format translation.  Typically this only happens in 12-bit mode.
 */

METHODDEF(void)
copy_pixel_rows(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
                JDIMENSION rows_supplied)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
  register char *bufferptr;
  register _JSAMPROW ptr;
  register JDIMENSION col;

  ptr = dest->pub._buffer[0];
  bufferptr = dest->iobuffer;
  for (col = dest->samples_per_row; col > 0; col--) {
    PUTPPMSAMPLE(bufferptr, *ptr++);
  }
  fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
}


/*
 * Convert extended RGB to RGB.
 */

METHODDEF(void)
put_rgb(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, JDIMENSION rows_supplied)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
  register char *bufferptr;
  register _JSAMPROW ptr;
  register JDIMENSION col;
  register int rindex = rgb_red[cinfo->out_color_space];
  register int gindex = rgb_green[cinfo->out_color_space];
  register int bindex = rgb_blue[cinfo->out_color_space];
  register int ps = rgb_pixelsize[cinfo->out_color_space];

  ptr = dest->pub._buffer[0];
  bufferptr = dest->iobuffer;
  for (col = cinfo->output_width; col > 0; col--) {
    PUTPPMSAMPLE(bufferptr, ptr[rindex]);
    PUTPPMSAMPLE(bufferptr, ptr[gindex]);
    PUTPPMSAMPLE(bufferptr, ptr[bindex]);
    ptr += ps;
  }
  fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
}


/*
 * Convert CMYK to RGB.
 */

METHODDEF(void)
put_cmyk(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
         JDIMENSION rows_supplied)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
  register char *bufferptr;
  register _JSAMPROW ptr;
  register JDIMENSION col;

  ptr = dest->pub._buffer[0];
  bufferptr = dest->iobuffer;
  for (col = cinfo->output_width; col > 0; col--) {
    _JSAMPLE r, g, b, c = *ptr++, m = *ptr++, y = *ptr++, k = *ptr++;
    cmyk_to_rgb(PPM_MAXVAL, c, m, y, k, &r, &g, &b);
    PUTPPMSAMPLE(bufferptr, r);
    PUTPPMSAMPLE(bufferptr, g);
    PUTPPMSAMPLE(bufferptr, b);
  }
  fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
}


/*
 * Write some pixel data when color quantization is in effect.
 * We have to demap the color index values to straight data.
 */

METHODDEF(void)
put_demapped_rgb(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
                 JDIMENSION rows_supplied)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
  register char *bufferptr;
  register int pixval;
  register _JSAMPROW ptr;
  register _JSAMPROW color_map0 =
    ((_JSAMPARRAY)cinfo->colormap)[rgb_red[cinfo->out_color_space]];
  register _JSAMPROW color_map1 =
    ((_JSAMPARRAY)cinfo->colormap)[rgb_green[cinfo->out_color_space]];
  register _JSAMPROW color_map2 =
    ((_JSAMPARRAY)cinfo->colormap)[rgb_blue[cinfo->out_color_space]];
  register JDIMENSION col;

  ptr = dest->pub._buffer[0];
  bufferptr = dest->iobuffer;
  for (col = cinfo->output_width; col > 0; col--) {
    pixval = *ptr++;
    PUTPPMSAMPLE(bufferptr, color_map0[pixval]);
    PUTPPMSAMPLE(bufferptr, color_map1[pixval]);
    PUTPPMSAMPLE(bufferptr, color_map2[pixval]);
  }
  fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
}


METHODDEF(void)
put_demapped_gray(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
                  JDIMENSION rows_supplied)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
  register char *bufferptr;
  register _JSAMPROW ptr;
  register _JSAMPROW color_map = ((_JSAMPARRAY)cinfo->colormap)[0];
  register JDIMENSION col;

  ptr = dest->pub._buffer[0];
  bufferptr = dest->iobuffer;
  for (col = cinfo->output_width; col > 0; col--) {
    PUTPPMSAMPLE(bufferptr, color_map[*ptr++]);
  }
  fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
}


/*
 * Startup: write the file header.
 */

METHODDEF(void)
start_output_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;

  /* Emit file header */
  switch (cinfo->out_color_space) {
  case JCS_GRAYSCALE:
    /* emit header for raw PGM format */
    fprintf(dest->pub.output_file, "P5\n%ld %ld\n%d\n",
            (long)cinfo->output_width, (long)cinfo->output_height, PPM_MAXVAL);
    break;
  case JCS_RGB:
  case JCS_EXT_RGB:
  case JCS_EXT_RGBX:
  case JCS_EXT_BGR:
  case JCS_EXT_BGRX:
  case JCS_EXT_XBGR:
  case JCS_EXT_XRGB:
  case JCS_EXT_RGBA:
  case JCS_EXT_BGRA:
  case JCS_EXT_ABGR:
  case JCS_EXT_ARGB:
  case JCS_CMYK:
    if (!IsExtRGB(cinfo->out_color_space) && cinfo->quantize_colors)
      ERREXIT(cinfo, JERR_PPM_COLORSPACE);
    /* emit header for raw PPM format */
    fprintf(dest->pub.output_file, "P6\n%ld %ld\n%d\n",
            (long)cinfo->output_width, (long)cinfo->output_height, PPM_MAXVAL);
    break;
  default:
    ERREXIT(cinfo, JERR_PPM_COLORSPACE);
  }
}


/*
 * Finish up at the end of the file.
 */

METHODDEF(void)
finish_output_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
{
  /* Make sure we wrote the output file OK */
  fflush(dinfo->output_file);
  if (ferror(dinfo->output_file))
    ERREXIT(cinfo, JERR_FILE_WRITE);
}


/*
 * Re-calculate buffer dimensions based on output dimensions.
 */

METHODDEF(void)
calc_buffer_dimensions_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;

  if (cinfo->out_color_space == JCS_GRAYSCALE)
    dest->samples_per_row = cinfo->output_width * cinfo->out_color_components;
  else
    dest->samples_per_row = cinfo->output_width * 3;
  dest->buffer_width = dest->samples_per_row * BYTESPERSAMPLE;
}


/*
 * The module selection routine for PPM format output.
 */

GLOBAL(djpeg_dest_ptr)
_jinit_write_ppm(j_decompress_ptr cinfo)
{
  ppm_dest_ptr dest;

#if BITS_IN_JSAMPLE == 8
  if (cinfo->data_precision > BITS_IN_JSAMPLE || cinfo->data_precision < 2)
#else
  if (cinfo->data_precision > BITS_IN_JSAMPLE ||
      cinfo->data_precision < BITS_IN_JSAMPLE - 3)
#endif
    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);

  /* Create module interface object, fill in method pointers */
  dest = (ppm_dest_ptr)
      (*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
                                  sizeof(ppm_dest_struct));
  dest->pub.start_output = start_output_ppm;
  dest->pub.finish_output = finish_output_ppm;
  dest->pub.calc_buffer_dimensions = calc_buffer_dimensions_ppm;

  /* Calculate output image dimensions so we can allocate space */
  if (cinfo->image_width > JPEG_MAX_DIMENSION ||
      cinfo->image_height > JPEG_MAX_DIMENSION)
    ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, JPEG_MAX_DIMENSION);
  jpeg_calc_output_dimensions(cinfo);

  /* Create physical I/O buffer */
  dest->pub.calc_buffer_dimensions(cinfo, (djpeg_dest_ptr)dest);
  dest->iobuffer = (char *)(*cinfo->mem->alloc_small)
    ((j_common_ptr)cinfo, JPOOL_IMAGE, dest->buffer_width);

#if BITS_IN_JSAMPLE == 8
  if (cinfo->quantize_colors ||
      (cinfo->out_color_space != JCS_EXT_RGB &&
#if RGB_RED == 0 && RGB_GREEN == 1 && RGB_BLUE == 2 && RGB_PIXELSIZE == 3
       cinfo->out_color_space != JCS_RGB &&
#endif
       cinfo->out_color_space != JCS_GRAYSCALE))
#endif
  {
    /* When quantizing, we need an output buffer for colormap indexes
     * that's separate from the physical I/O buffer.  We also need a
     * separate buffer if pixel format translation must take place.
     */
    dest->pub._buffer = (_JSAMPARRAY)(*cinfo->mem->alloc_sarray)
      ((j_common_ptr)cinfo, JPOOL_IMAGE,
       cinfo->output_width * cinfo->output_components, (JDIMENSION)1);
    dest->pub.buffer_height = 1;
    if (!cinfo->quantize_colors) {
      if (IsExtRGB(cinfo->out_color_space))
        dest->pub.put_pixel_rows = put_rgb;
      else if (cinfo->out_color_space == JCS_CMYK)
        dest->pub.put_pixel_rows = put_cmyk;
      else
        dest->pub.put_pixel_rows = copy_pixel_rows;
    } else if (cinfo->out_color_space == JCS_GRAYSCALE)
      dest->pub.put_pixel_rows = put_demapped_gray;
    else
      dest->pub.put_pixel_rows = put_demapped_rgb;
  }
#if BITS_IN_JSAMPLE == 8
  else {
    /* We will fwrite() directly from decompressor output buffer. */
    /* Synthesize a _JSAMPARRAY pointer structure */
    dest->pixrow = (_JSAMPROW)dest->iobuffer;
    dest->pub._buffer = &dest->pixrow;
    dest->pub.buffer_height = 1;
    dest->pub.put_pixel_rows = put_pixel_rows;
  }
#endif

  return (djpeg_dest_ptr)dest;
}

#endif /* defined(PPM_SUPPORTED) &&
          (BITS_IN_JSAMPLE != 16 || defined(D_LOSSLESS_SUPPORTED)) */

Coverage Report

Created: 2026-08-31 07:19

Line	Count	Source
1		/*
2		* wrppm.c
3		*
4		* This file was part of the Independent JPEG Group's software:
5		* Copyright (C) 1991-1996, Thomas G. Lane.
6		* Modified 2009 by Guido Vollbeding.
7		* libjpeg-turbo Modifications:
8		* Copyright (C) 2017, 2019-2020, 2022, 2024, 2026, D. R. Commander.
9		* For conditions of distribution and use, see the accompanying README.ijg
10		* file.
11		*
12		* This file contains routines to write output images in PPM/PGM format.
13		* The extended 2-byte-per-sample raw PPM/PGM formats are supported.
14		* The PBMPLUS library is NOT required to compile this software
15		* (but it is highly useful as a set of PPM image manipulation programs).
16		*
17		* These routines may need modification for non-Unix environments or
18		* specialized applications. As they stand, they assume output to
19		* an ordinary stdio stream.
20		*/
21
22		#include "cmyk.h"
23		#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
24
25		#if defined(PPM_SUPPORTED) && \
26		(BITS_IN_JSAMPLE != 16 \|\| defined(D_LOSSLESS_SUPPORTED))
27
28
29		/*
30		* For 12-bit JPEG data, we either downscale the values to 8 bits
31		* (to write standard byte-per-sample PPM/PGM files), or output
32		* nonstandard word-per-sample PPM/PGM files. Downscaling is done
33		* if PPM_NORAWWORD is defined (this can be done in the Makefile
34		* or in jconfig.h).
35		* (When the core library supports data precision reduction, a cleaner
36		* implementation will be to ask for that instead.)
37		*/
38
39		#if BITS_IN_JSAMPLE == 8
40	0	#define PUTPPMSAMPLE(ptr, v) *ptr++ = (char)(v)
41	0	#define BYTESPERSAMPLE 1
42	0	#define PPM_MAXVAL ((1 << cinfo->data_precision) - 1)
43		#else
44		#ifdef PPM_NORAWWORD
45		#define PUTPPMSAMPLE(ptr, v) \
46		*ptr++ = (char)((v) >> (cinfo->data_precision - 8))
47		#define BYTESPERSAMPLE 1
48		#define PPM_MAXVAL 255
49		#else
50		/* The word-per-sample format always puts the MSB first. */
51	0	#define PUTPPMSAMPLE(ptr, v) { \
52	0	register int val_ = v; \
53	0	*ptr++ = (char)((val_ >> 8) & 0xFF); \
54	0	*ptr++ = (char)(val_ & 0xFF); \
55	0	}
56	0	#define BYTESPERSAMPLE 2
57	0	#define PPM_MAXVAL ((1 << cinfo->data_precision) - 1)
58		#endif
59		#endif
60
61
62		/*
63		* When _JSAMPLE is the same size as char, we can just fwrite() the
64		* decompressed data to the PPM or PGM file.
65		*/
66
67
68		/* Private version of data destination object */
69
70		typedef struct {
71		struct djpeg_dest_struct pub; /* public fields */
72
73		/* Usually these two pointers point to the same place: */
74		char iobuffer; / fwrite's I/O buffer */
75		_JSAMPROW pixrow; /* decompressor output buffer */
76		size_t buffer_width; /* width of I/O buffer */
77		JDIMENSION samples_per_row; /* _JSAMPLEs per output row */
78		} ppm_dest_struct;
79
80		typedef ppm_dest_struct *ppm_dest_ptr;
81
82
83		#if BITS_IN_JSAMPLE == 8
84
85		/*
86		* Write some pixel data.
87		* In this module rows_supplied will always be 1.
88		*
89		* put_pixel_rows handles the "normal" 8-bit case where the decompressor
90		* output buffer is physically the same as the fwrite buffer.
91		*/
92
93		METHODDEF(void)
94		put_pixel_rows(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
95		JDIMENSION rows_supplied)
96	0	{
97	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
98
99	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
100	0	}
101
102		#endif
103
104
105		/*
106		* This code is used when we have to copy the data and apply a pixel
107		* format translation. Typically this only happens in 12-bit mode.
108		*/
109
110		METHODDEF(void)
111		copy_pixel_rows(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
112		JDIMENSION rows_supplied)
113	0	{
114	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
115	0	register char *bufferptr;
116	0	register _JSAMPROW ptr;
117	0	register JDIMENSION col;
118
119	0	ptr = dest->pub._buffer[0];
120	0	bufferptr = dest->iobuffer;
121	0	for (col = dest->samples_per_row; col > 0; col--) {
122	0	PUTPPMSAMPLE(bufferptr, *ptr++);
123	0	}
124	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
125	0	} Unexecuted instantiation: wrppm-8.c:copy_pixel_rows Unexecuted instantiation: wrppm-12.c:copy_pixel_rows Unexecuted instantiation: wrppm-16.c:copy_pixel_rows
126
127
128		/*
129		* Convert extended RGB to RGB.
130		*/
131
132		METHODDEF(void)
133		put_rgb(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, JDIMENSION rows_supplied)
134	0	{
135	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
136	0	register char *bufferptr;
137	0	register _JSAMPROW ptr;
138	0	register JDIMENSION col;
139	0	register int rindex = rgb_red[cinfo->out_color_space];
140	0	register int gindex = rgb_green[cinfo->out_color_space];
141	0	register int bindex = rgb_blue[cinfo->out_color_space];
142	0	register int ps = rgb_pixelsize[cinfo->out_color_space];
143
144	0	ptr = dest->pub._buffer[0];
145	0	bufferptr = dest->iobuffer;
146	0	for (col = cinfo->output_width; col > 0; col--) {
147	0	PUTPPMSAMPLE(bufferptr, ptr[rindex]);
148	0	PUTPPMSAMPLE(bufferptr, ptr[gindex]);
149	0	PUTPPMSAMPLE(bufferptr, ptr[bindex]);
150	0	ptr += ps;
151	0	}
152	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
153	0	} Unexecuted instantiation: wrppm-8.c:put_rgb Unexecuted instantiation: wrppm-12.c:put_rgb Unexecuted instantiation: wrppm-16.c:put_rgb
154
155
156		/*
157		* Convert CMYK to RGB.
158		*/
159
160		METHODDEF(void)
161		put_cmyk(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
162		JDIMENSION rows_supplied)
163	0	{
164	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
165	0	register char *bufferptr;
166	0	register _JSAMPROW ptr;
167	0	register JDIMENSION col;
168
169	0	ptr = dest->pub._buffer[0];
170	0	bufferptr = dest->iobuffer;
171	0	for (col = cinfo->output_width; col > 0; col--) {
172	0	_JSAMPLE r, g, b, c = ptr++, m = ptr++, y = ptr++, k = ptr++;
173	0	cmyk_to_rgb(PPM_MAXVAL, c, m, y, k, &r, &g, &b);
174	0	PUTPPMSAMPLE(bufferptr, r);
175	0	PUTPPMSAMPLE(bufferptr, g);
176	0	PUTPPMSAMPLE(bufferptr, b);
177	0	}
178	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
179	0	} Unexecuted instantiation: wrppm-8.c:put_cmyk Unexecuted instantiation: wrppm-12.c:put_cmyk Unexecuted instantiation: wrppm-16.c:put_cmyk
180
181
182		/*
183		* Write some pixel data when color quantization is in effect.
184		* We have to demap the color index values to straight data.
185		*/
186
187		METHODDEF(void)
188		put_demapped_rgb(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
189		JDIMENSION rows_supplied)
190	0	{
191	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
192	0	register char *bufferptr;
193	0	register int pixval;
194	0	register _JSAMPROW ptr;
195	0	register _JSAMPROW color_map0 =
196	0	((_JSAMPARRAY)cinfo->colormap)[rgb_red[cinfo->out_color_space]];
197	0	register _JSAMPROW color_map1 =
198	0	((_JSAMPARRAY)cinfo->colormap)[rgb_green[cinfo->out_color_space]];
199	0	register _JSAMPROW color_map2 =
200	0	((_JSAMPARRAY)cinfo->colormap)[rgb_blue[cinfo->out_color_space]];
201	0	register JDIMENSION col;
202
203	0	ptr = dest->pub._buffer[0];
204	0	bufferptr = dest->iobuffer;
205	0	for (col = cinfo->output_width; col > 0; col--) {
206	0	pixval = *ptr++;
207	0	PUTPPMSAMPLE(bufferptr, color_map0[pixval]);
208	0	PUTPPMSAMPLE(bufferptr, color_map1[pixval]);
209	0	PUTPPMSAMPLE(bufferptr, color_map2[pixval]);
210	0	}
211	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
212	0	} Unexecuted instantiation: wrppm-8.c:put_demapped_rgb Unexecuted instantiation: wrppm-12.c:put_demapped_rgb Unexecuted instantiation: wrppm-16.c:put_demapped_rgb
213
214
215		METHODDEF(void)
216		put_demapped_gray(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
217		JDIMENSION rows_supplied)
218	0	{
219	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
220	0	register char *bufferptr;
221	0	register _JSAMPROW ptr;
222	0	register _JSAMPROW color_map = ((_JSAMPARRAY)cinfo->colormap)[0];
223	0	register JDIMENSION col;
224
225	0	ptr = dest->pub._buffer[0];
226	0	bufferptr = dest->iobuffer;
227	0	for (col = cinfo->output_width; col > 0; col--) {
228	0	PUTPPMSAMPLE(bufferptr, color_map[*ptr++]);
229	0	}
230	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
231	0	} Unexecuted instantiation: wrppm-8.c:put_demapped_gray Unexecuted instantiation: wrppm-12.c:put_demapped_gray Unexecuted instantiation: wrppm-16.c:put_demapped_gray
232
233
234		/*
235		* Startup: write the file header.
236		*/
237
238		METHODDEF(void)
239		start_output_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
240	0	{
241	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
242
243		/* Emit file header */
244	0	switch (cinfo->out_color_space) {
245	0	case JCS_GRAYSCALE:
246		/* emit header for raw PGM format */
247	0	fprintf(dest->pub.output_file, "P5\n%ld %ld\n%d\n",
248	0	(long)cinfo->output_width, (long)cinfo->output_height, PPM_MAXVAL);
249	0	break;
250	0	case JCS_RGB:
251	0	case JCS_EXT_RGB:
252	0	case JCS_EXT_RGBX:
253	0	case JCS_EXT_BGR:
254	0	case JCS_EXT_BGRX:
255	0	case JCS_EXT_XBGR:
256	0	case JCS_EXT_XRGB:
257	0	case JCS_EXT_RGBA:
258	0	case JCS_EXT_BGRA:
259	0	case JCS_EXT_ABGR:
260	0	case JCS_EXT_ARGB:
261	0	case JCS_CMYK:
262	0	if (!IsExtRGB(cinfo->out_color_space) && cinfo->quantize_colors)
263	0	ERREXIT(cinfo, JERR_PPM_COLORSPACE);
264		/* emit header for raw PPM format */
265	0	fprintf(dest->pub.output_file, "P6\n%ld %ld\n%d\n",
266	0	(long)cinfo->output_width, (long)cinfo->output_height, PPM_MAXVAL);
267	0	break;
268	0	default:
269	0	ERREXIT(cinfo, JERR_PPM_COLORSPACE);
270	0	}
271	0	} Unexecuted instantiation: wrppm-8.c:start_output_ppm Unexecuted instantiation: wrppm-12.c:start_output_ppm Unexecuted instantiation: wrppm-16.c:start_output_ppm
272
273
274		/*
275		* Finish up at the end of the file.
276		*/
277
278		METHODDEF(void)
279		finish_output_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
280	0	{
281		/* Make sure we wrote the output file OK */
282	0	fflush(dinfo->output_file);
283	0	if (ferror(dinfo->output_file))
284	0	ERREXIT(cinfo, JERR_FILE_WRITE);
285	0	} Unexecuted instantiation: wrppm-8.c:finish_output_ppm Unexecuted instantiation: wrppm-12.c:finish_output_ppm Unexecuted instantiation: wrppm-16.c:finish_output_ppm
286
287
288		/*
289		* Re-calculate buffer dimensions based on output dimensions.
290		*/
291
292		METHODDEF(void)
293		calc_buffer_dimensions_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
294	0	{
295	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
296
297	0	if (cinfo->out_color_space == JCS_GRAYSCALE)
298	0	dest->samples_per_row = cinfo->output_width * cinfo->out_color_components;
299	0	else
300	0	dest->samples_per_row = cinfo->output_width * 3;
301	0	dest->buffer_width = dest->samples_per_row * BYTESPERSAMPLE;
302	0	} Unexecuted instantiation: wrppm-8.c:calc_buffer_dimensions_ppm Unexecuted instantiation: wrppm-12.c:calc_buffer_dimensions_ppm Unexecuted instantiation: wrppm-16.c:calc_buffer_dimensions_ppm
303
304
305		/*
306		* The module selection routine for PPM format output.
307		*/
308
309		GLOBAL(djpeg_dest_ptr)
310		_jinit_write_ppm(j_decompress_ptr cinfo)
311	0	{
312	0	ppm_dest_ptr dest;
313
314		#if BITS_IN_JSAMPLE == 8
315	0	if (cinfo->data_precision > BITS_IN_JSAMPLE \|\| cinfo->data_precision < 2)
316		#else
317	0	if (cinfo->data_precision > BITS_IN_JSAMPLE \|\|
318	0	cinfo->data_precision < BITS_IN_JSAMPLE - 3)
319	0	#endif
320	0	ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
321
322		/* Create module interface object, fill in method pointers */
323	0	dest = (ppm_dest_ptr)
324	0	(*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
325	0	sizeof(ppm_dest_struct));
326	0	dest->pub.start_output = start_output_ppm;
327	0	dest->pub.finish_output = finish_output_ppm;
328	0	dest->pub.calc_buffer_dimensions = calc_buffer_dimensions_ppm;
329
330		/* Calculate output image dimensions so we can allocate space */
331	0	if (cinfo->image_width > JPEG_MAX_DIMENSION \|\|
332	0	cinfo->image_height > JPEG_MAX_DIMENSION)
333	0	ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, JPEG_MAX_DIMENSION);
334	0	jpeg_calc_output_dimensions(cinfo);
335
336		/* Create physical I/O buffer */
337	0	dest->pub.calc_buffer_dimensions(cinfo, (djpeg_dest_ptr)dest);
338	0	dest->iobuffer = (char )(cinfo->mem->alloc_small)
339	0	((j_common_ptr)cinfo, JPOOL_IMAGE, dest->buffer_width);
340
341		#if BITS_IN_JSAMPLE == 8
342	0	if (cinfo->quantize_colors \|\|
343	0	(cinfo->out_color_space != JCS_EXT_RGB &&
344	0	#if RGB_RED == 0 && RGB_GREEN == 1 && RGB_BLUE == 2 && RGB_PIXELSIZE == 3
345	0	cinfo->out_color_space != JCS_RGB &&
346	0	#endif
347	0	cinfo->out_color_space != JCS_GRAYSCALE))
348	0	#endif
349	0	{
350		/* When quantizing, we need an output buffer for colormap indexes
351		* that's separate from the physical I/O buffer. We also need a
352		* separate buffer if pixel format translation must take place.
353		*/
354	0	dest->pub._buffer = (_JSAMPARRAY)(*cinfo->mem->alloc_sarray)
355	0	((j_common_ptr)cinfo, JPOOL_IMAGE,
356	0	cinfo->output_width * cinfo->output_components, (JDIMENSION)1);
357	0	dest->pub.buffer_height = 1;
358	0	if (!cinfo->quantize_colors) {
359	0	if (IsExtRGB(cinfo->out_color_space))
360	0	dest->pub.put_pixel_rows = put_rgb;
361	0	else if (cinfo->out_color_space == JCS_CMYK)
362	0	dest->pub.put_pixel_rows = put_cmyk;
363	0	else
364	0	dest->pub.put_pixel_rows = copy_pixel_rows;
365	0	} else if (cinfo->out_color_space == JCS_GRAYSCALE)
366	0	dest->pub.put_pixel_rows = put_demapped_gray;
367	0	else
368	0	dest->pub.put_pixel_rows = put_demapped_rgb;
369	0	}
370		#if BITS_IN_JSAMPLE == 8
371	0	else {
372		/* We will fwrite() directly from decompressor output buffer. */
373		/* Synthesize a _JSAMPARRAY pointer structure */
374	0	dest->pixrow = (_JSAMPROW)dest->iobuffer;
375	0	dest->pub._buffer = &dest->pixrow;
376	0	dest->pub.buffer_height = 1;
377	0	dest->pub.put_pixel_rows = put_pixel_rows;
378	0	}
379		#endif
380
381	0	return (djpeg_dest_ptr)dest;
382	0	} Unexecuted instantiation: jinit_write_ppm Unexecuted instantiation: j12init_write_ppm Unexecuted instantiation: j16init_write_ppm
383
384		#endif /* defined(PPM_SUPPORTED) &&
385		(BITS_IN_JSAMPLE != 16 \|\| defined(D_LOSSLESS_SUPPORTED)) */