/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

static INLINE boolean is_big_endian(void)
{
  int test_value = 1;
  if (*(char *)&test_value != 1)
    return TRUE;
  return FALSE;
}


/*
 * 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.
 */

#ifndef DJPEG_MULTILINE

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

#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 row = 0, col;

#ifdef DJPEG_MULTILINE
  for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
#endif
    ptr = dest->pub._buffer[row];
    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);
#ifdef DJPEG_MULTILINE
  }
#endif
}


/*
 * 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 row = 0, 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];

#ifdef DJPEG_MULTILINE
  for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
#endif
    ptr = dest->pub._buffer[row];
    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);
#ifdef DJPEG_MULTILINE
  }
#endif
}


#if BITS_IN_JSAMPLE == 8

/*
 * Convert RGB565 to RGB.
 */

METHODDEF(void)
put_rgb565(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
           JDIMENSION rows_supplied)
{
  ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
  register char *bufferptr;
  register unsigned short *ptr;
  register JDIMENSION row = 0, col;
  boolean big_endian = is_big_endian();

#ifdef DJPEG_MULTILINE
  for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
#endif
    ptr = (unsigned short *)dest->pub._buffer[row];
    bufferptr = dest->iobuffer;
    for (col = cinfo->output_width; col > 0; col--) {
      if (big_endian) {
        bufferptr[0] = *ptr & 0xF8;
        bufferptr[1] = ((*ptr << 5) & 0xE0) | ((*ptr >> 11) & 0x1C);
        bufferptr[2] = (*ptr >> 5) & 0xF8;
      } else {
        bufferptr[0] = (*ptr >> 8) & 0xF8;
        bufferptr[1] = (*ptr >> 3) & 0xFC;
        bufferptr[2] = (*ptr << 3) & 0xF8;
      }
      bufferptr += 3;
      ptr++;
    }
    fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
#ifdef DJPEG_MULTILINE
  }
#endif
}

#endif


/*
 * 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 row = 0, col;

#ifdef DJPEG_MULTILINE
  for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
#endif
    ptr = dest->pub._buffer[row];
    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);
#ifdef DJPEG_MULTILINE
  }
#endif
}


/*
 * 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 row = 0, col;

#ifdef DJPEG_MULTILINE
  for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
#endif
    ptr = dest->pub._buffer[row];
    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);
#ifdef DJPEG_MULTILINE
  }
#endif
}


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 row = 0, col;

#ifdef DJPEG_MULTILINE
  for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
#endif
    ptr = dest->pub._buffer[row];
    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);
#ifdef DJPEG_MULTILINE
  }
#endif
}


/*
 * 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:
#if BITS_IN_JSAMPLE == 8
  case JCS_RGB565:
#endif
  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 && !defined(DJPEG_MULTILINE)
  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.
     */
#if BITS_IN_JSAMPLE == 8 && defined(DJPEG_MULTILINE)
    /* Allocate the sample array manually to ensure that the rows are
     * contiguous in memory, which further exercises esoteric code paths in the
     * library.
     */
    JDIMENSION row_width = cinfo->output_width * cinfo->output_components;
    dest->pub._buffer = (JSAMPARRAY)(*cinfo->mem->alloc_small)
      ((j_common_ptr)cinfo, JPOOL_IMAGE, 4 * sizeof(JSAMPROW));
    dest->pub._buffer[0] = (JSAMPROW)(*cinfo->mem->alloc_small)
      ((j_common_ptr)cinfo, JPOOL_IMAGE, row_width * 4);
    dest->pub._buffer[1] = dest->pub._buffer[0] + row_width;
    dest->pub._buffer[2] = dest->pub._buffer[1] + row_width;
    dest->pub._buffer[3] = dest->pub._buffer[2] + row_width;
    dest->pub.buffer_height = 4;
#else
    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;
#endif
    if (!cinfo->quantize_colors) {
      if (IsExtRGB(cinfo->out_color_space))
        dest->pub.put_pixel_rows = put_rgb;
#if BITS_IN_JSAMPLE == 8
      else if (cinfo->out_color_space == JCS_RGB565)
        dest->pub.put_pixel_rows = put_rgb565;
#endif
      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 && !defined(DJPEG_MULTILINE)
  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: 2026-10-28 06:08

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
23		#include "cmyk.h"
24		#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
25
26		#if defined(PPM_SUPPORTED) && \
27		(BITS_IN_JSAMPLE != 16 \|\| defined(D_LOSSLESS_SUPPORTED))
28
29
30		/*
31		* For 12-bit JPEG data, we either downscale the values to 8 bits
32		* (to write standard byte-per-sample PPM/PGM files), or output
33		* nonstandard word-per-sample PPM/PGM files. Downscaling is done
34		* if PPM_NORAWWORD is defined (this can be done in the Makefile
35		* or in jconfig.h).
36		* (When the core library supports data precision reduction, a cleaner
37		* implementation will be to ask for that instead.)
38		*/
39
40		#if BITS_IN_JSAMPLE == 8
41	0	#define PUTPPMSAMPLE(ptr, v) *ptr++ = (char)(v)
42	0	#define BYTESPERSAMPLE 1
43	0	#define PPM_MAXVAL ((1 << cinfo->data_precision) - 1)
44		#else
45		#ifdef PPM_NORAWWORD
46		#define PUTPPMSAMPLE(ptr, v) \
47		*ptr++ = (char)((v) >> (cinfo->data_precision - 8))
48		#define BYTESPERSAMPLE 1
49		#define PPM_MAXVAL 255
50		#else
51		/* The word-per-sample format always puts the MSB first. */
52	0	#define PUTPPMSAMPLE(ptr, v) { \
53	0	register int val_ = v; \
54	0	*ptr++ = (char)((val_ >> 8) & 0xFF); \
55	0	*ptr++ = (char)(val_ & 0xFF); \
56	0	}
57	0	#define BYTESPERSAMPLE 2
58	0	#define PPM_MAXVAL ((1 << cinfo->data_precision) - 1)
59		#endif
60		#endif
61
62
63		/*
64		* When _JSAMPLE is the same size as char, we can just fwrite() the
65		* decompressed data to the PPM or PGM file.
66		*/
67
68
69		/* Private version of data destination object */
70
71		typedef struct {
72		struct djpeg_dest_struct pub; /* public fields */
73
74		/* Usually these two pointers point to the same place: */
75		char iobuffer; / fwrite's I/O buffer */
76		_JSAMPROW pixrow; /* decompressor output buffer */
77		size_t buffer_width; /* width of I/O buffer */
78		JDIMENSION samples_per_row; /* _JSAMPLEs per output row */
79		} ppm_dest_struct;
80
81		typedef ppm_dest_struct *ppm_dest_ptr;
82
83
84		#if BITS_IN_JSAMPLE == 8
85
86		static INLINE boolean is_big_endian(void)
87	0	{
88	0	int test_value = 1;
89	0	if ((char )&test_value != 1)
90	0	return TRUE;
91	0	return FALSE;
92	0	}
93
94
95		/*
96		* Write some pixel data.
97		* In this module rows_supplied will always be 1.
98		*
99		* put_pixel_rows handles the "normal" 8-bit case where the decompressor
100		* output buffer is physically the same as the fwrite buffer.
101		*/
102
103		#ifndef DJPEG_MULTILINE
104
105		METHODDEF(void)
106		put_pixel_rows(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
107		JDIMENSION rows_supplied)
108	0	{
109	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
110
111	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
112	0	}
113
114		#endif
115
116		#endif
117
118
119		/*
120		* This code is used when we have to copy the data and apply a pixel
121		* format translation. Typically this only happens in 12-bit mode.
122		*/
123
124		METHODDEF(void)
125		copy_pixel_rows(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
126		JDIMENSION rows_supplied)
127	0	{
128	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
129	0	register char *bufferptr;
130	0	register _JSAMPROW ptr;
131	0	register JDIMENSION row = 0, col;
132
133		#ifdef DJPEG_MULTILINE
134		for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
135		#endif
136	0	ptr = dest->pub._buffer[row];
137	0	bufferptr = dest->iobuffer;
138	0	for (col = dest->samples_per_row; col > 0; col--) {
139	0	PUTPPMSAMPLE(bufferptr, *ptr++);
140	0	}
141	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
142		#ifdef DJPEG_MULTILINE
143		}
144		#endif
145	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
146
147
148		/*
149		* Convert extended RGB to RGB.
150		*/
151
152		METHODDEF(void)
153		put_rgb(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, JDIMENSION rows_supplied)
154	0	{
155	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
156	0	register char *bufferptr;
157	0	register _JSAMPROW ptr;
158	0	register JDIMENSION row = 0, col;
159	0	register int rindex = rgb_red[cinfo->out_color_space];
160	0	register int gindex = rgb_green[cinfo->out_color_space];
161	0	register int bindex = rgb_blue[cinfo->out_color_space];
162	0	register int ps = rgb_pixelsize[cinfo->out_color_space];
163
164		#ifdef DJPEG_MULTILINE
165		for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
166		#endif
167	0	ptr = dest->pub._buffer[row];
168	0	bufferptr = dest->iobuffer;
169	0	for (col = cinfo->output_width; col > 0; col--) {
170	0	PUTPPMSAMPLE(bufferptr, ptr[rindex]);
171	0	PUTPPMSAMPLE(bufferptr, ptr[gindex]);
172	0	PUTPPMSAMPLE(bufferptr, ptr[bindex]);
173	0	ptr += ps;
174	0	}
175	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
176		#ifdef DJPEG_MULTILINE
177		}
178		#endif
179	0	} Unexecuted instantiation: wrppm-8.c:put_rgb Unexecuted instantiation: wrppm-12.c:put_rgb Unexecuted instantiation: wrppm-16.c:put_rgb
180
181
182		#if BITS_IN_JSAMPLE == 8
183
184		/*
185		* Convert RGB565 to RGB.
186		*/
187
188		METHODDEF(void)
189		put_rgb565(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
190		JDIMENSION rows_supplied)
191	0	{
192	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
193	0	register char *bufferptr;
194	0	register unsigned short *ptr;
195	0	register JDIMENSION row = 0, col;
196	0	boolean big_endian = is_big_endian();
197
198		#ifdef DJPEG_MULTILINE
199		for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
200		#endif
201	0	ptr = (unsigned short *)dest->pub._buffer[row];
202	0	bufferptr = dest->iobuffer;
203	0	for (col = cinfo->output_width; col > 0; col--) {
204	0	if (big_endian) {
205	0	bufferptr[0] = *ptr & 0xF8;
206	0	bufferptr[1] = ((ptr << 5) & 0xE0) \| ((ptr >> 11) & 0x1C);
207	0	bufferptr[2] = (*ptr >> 5) & 0xF8;
208	0	} else {
209	0	bufferptr[0] = (*ptr >> 8) & 0xF8;
210	0	bufferptr[1] = (*ptr >> 3) & 0xFC;
211	0	bufferptr[2] = (*ptr << 3) & 0xF8;
212	0	}
213	0	bufferptr += 3;
214	0	ptr++;
215	0	}
216	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
217		#ifdef DJPEG_MULTILINE
218		}
219		#endif
220	0	}
221
222		#endif
223
224
225		/*
226		* Convert CMYK to RGB.
227		*/
228
229		METHODDEF(void)
230		put_cmyk(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
231		JDIMENSION rows_supplied)
232	0	{
233	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
234	0	register char *bufferptr;
235	0	register _JSAMPROW ptr;
236	0	register JDIMENSION row = 0, col;
237
238		#ifdef DJPEG_MULTILINE
239		for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
240		#endif
241	0	ptr = dest->pub._buffer[row];
242	0	bufferptr = dest->iobuffer;
243	0	for (col = cinfo->output_width; col > 0; col--) {
244	0	_JSAMPLE r, g, b, c = ptr++, m = ptr++, y = ptr++, k = ptr++;
245	0	cmyk_to_rgb(PPM_MAXVAL, c, m, y, k, &r, &g, &b);
246	0	PUTPPMSAMPLE(bufferptr, r);
247	0	PUTPPMSAMPLE(bufferptr, g);
248	0	PUTPPMSAMPLE(bufferptr, b);
249	0	}
250	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
251		#ifdef DJPEG_MULTILINE
252		}
253		#endif
254	0	} Unexecuted instantiation: wrppm-8.c:put_cmyk Unexecuted instantiation: wrppm-12.c:put_cmyk Unexecuted instantiation: wrppm-16.c:put_cmyk
255
256
257		/*
258		* Write some pixel data when color quantization is in effect.
259		* We have to demap the color index values to straight data.
260		*/
261
262		METHODDEF(void)
263		put_demapped_rgb(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
264		JDIMENSION rows_supplied)
265	0	{
266	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
267	0	register char *bufferptr;
268	0	register int pixval;
269	0	register _JSAMPROW ptr;
270	0	register _JSAMPROW color_map0 =
271	0	((_JSAMPARRAY)cinfo->colormap)[rgb_red[cinfo->out_color_space]];
272	0	register _JSAMPROW color_map1 =
273	0	((_JSAMPARRAY)cinfo->colormap)[rgb_green[cinfo->out_color_space]];
274	0	register _JSAMPROW color_map2 =
275	0	((_JSAMPARRAY)cinfo->colormap)[rgb_blue[cinfo->out_color_space]];
276	0	register JDIMENSION row = 0, col;
277
278		#ifdef DJPEG_MULTILINE
279		for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
280		#endif
281	0	ptr = dest->pub._buffer[row];
282	0	bufferptr = dest->iobuffer;
283	0	for (col = cinfo->output_width; col > 0; col--) {
284	0	pixval = *ptr++;
285	0	PUTPPMSAMPLE(bufferptr, color_map0[pixval]);
286	0	PUTPPMSAMPLE(bufferptr, color_map1[pixval]);
287	0	PUTPPMSAMPLE(bufferptr, color_map2[pixval]);
288	0	}
289	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
290		#ifdef DJPEG_MULTILINE
291		}
292		#endif
293	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
294
295
296		METHODDEF(void)
297		put_demapped_gray(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
298		JDIMENSION rows_supplied)
299	0	{
300	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
301	0	register char *bufferptr;
302	0	register _JSAMPROW ptr;
303	0	register _JSAMPROW color_map = ((_JSAMPARRAY)cinfo->colormap)[0];
304	0	register JDIMENSION row = 0, col;
305
306		#ifdef DJPEG_MULTILINE
307		for (row = 0; row < MIN(dest->pub.buffer_height, rows_supplied); row++) {
308		#endif
309	0	ptr = dest->pub._buffer[row];
310	0	bufferptr = dest->iobuffer;
311	0	for (col = cinfo->output_width; col > 0; col--) {
312	0	PUTPPMSAMPLE(bufferptr, color_map[*ptr++]);
313	0	}
314	0	fwrite(dest->iobuffer, 1, dest->buffer_width, dest->pub.output_file);
315		#ifdef DJPEG_MULTILINE
316		}
317		#endif
318	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
319
320
321		/*
322		* Startup: write the file header.
323		*/
324
325		METHODDEF(void)
326		start_output_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
327	0	{
328	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
329
330		/* Emit file header */
331	0	switch (cinfo->out_color_space) {
332	0	case JCS_GRAYSCALE:
333		/* emit header for raw PGM format */
334	0	fprintf(dest->pub.output_file, "P5\n%ld %ld\n%d\n",
335	0	(long)cinfo->output_width, (long)cinfo->output_height, PPM_MAXVAL);
336	0	break;
337	0	case JCS_RGB:
338	0	case JCS_EXT_RGB:
339	0	case JCS_EXT_RGBX:
340	0	case JCS_EXT_BGR:
341	0	case JCS_EXT_BGRX:
342	0	case JCS_EXT_XBGR:
343	0	case JCS_EXT_XRGB:
344	0	case JCS_EXT_RGBA:
345	0	case JCS_EXT_BGRA:
346	0	case JCS_EXT_ABGR:
347	0	case JCS_EXT_ARGB:
348		#if BITS_IN_JSAMPLE == 8
349	0	case JCS_RGB565:
350	0	#endif
351	0	case JCS_CMYK:
352	0	if (!IsExtRGB(cinfo->out_color_space) && cinfo->quantize_colors)
353	0	ERREXIT(cinfo, JERR_PPM_COLORSPACE);
354		/* emit header for raw PPM format */
355	0	fprintf(dest->pub.output_file, "P6\n%ld %ld\n%d\n",
356	0	(long)cinfo->output_width, (long)cinfo->output_height, PPM_MAXVAL);
357	0	break;
358	0	default:
359	0	ERREXIT(cinfo, JERR_PPM_COLORSPACE);
360	0	}
361	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
362
363
364		/*
365		* Finish up at the end of the file.
366		*/
367
368		METHODDEF(void)
369		finish_output_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
370	0	{
371		/* Make sure we wrote the output file OK */
372	0	fflush(dinfo->output_file);
373	0	if (ferror(dinfo->output_file))
374	0	ERREXIT(cinfo, JERR_FILE_WRITE);
375	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
376
377
378		/*
379		* Re-calculate buffer dimensions based on output dimensions.
380		*/
381
382		METHODDEF(void)
383		calc_buffer_dimensions_ppm(j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
384	0	{
385	0	ppm_dest_ptr dest = (ppm_dest_ptr)dinfo;
386
387	0	if (cinfo->out_color_space == JCS_GRAYSCALE)
388	0	dest->samples_per_row = cinfo->output_width * cinfo->out_color_components;
389	0	else
390	0	dest->samples_per_row = cinfo->output_width * 3;
391	0	dest->buffer_width = dest->samples_per_row * BYTESPERSAMPLE;
392	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
393
394
395		/*
396		* The module selection routine for PPM format output.
397		*/
398
399		GLOBAL(djpeg_dest_ptr)
400		_jinit_write_ppm(j_decompress_ptr cinfo)
401	0	{
402	0	ppm_dest_ptr dest;
403
404		#if BITS_IN_JSAMPLE == 8
405	0	if (cinfo->data_precision > BITS_IN_JSAMPLE \|\| cinfo->data_precision < 2)
406		#else
407	0	if (cinfo->data_precision > BITS_IN_JSAMPLE \|\|
408	0	cinfo->data_precision < BITS_IN_JSAMPLE - 3)
409	0	#endif
410	0	ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
411
412		/* Create module interface object, fill in method pointers */
413	0	dest = (ppm_dest_ptr)
414	0	(*cinfo->mem->alloc_small) ((j_common_ptr)cinfo, JPOOL_IMAGE,
415	0	sizeof(ppm_dest_struct));
416	0	dest->pub.start_output = start_output_ppm;
417	0	dest->pub.finish_output = finish_output_ppm;
418	0	dest->pub.calc_buffer_dimensions = calc_buffer_dimensions_ppm;
419
420		/* Calculate output image dimensions so we can allocate space */
421	0	if (cinfo->image_width > JPEG_MAX_DIMENSION \|\|
422	0	cinfo->image_height > JPEG_MAX_DIMENSION)
423	0	ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, JPEG_MAX_DIMENSION);
424	0	jpeg_calc_output_dimensions(cinfo);
425
426		/* Create physical I/O buffer */
427	0	dest->pub.calc_buffer_dimensions(cinfo, (djpeg_dest_ptr)dest);
428	0	dest->iobuffer = (char )(cinfo->mem->alloc_small)
429	0	((j_common_ptr)cinfo, JPOOL_IMAGE, dest->buffer_width);
430
431		#if BITS_IN_JSAMPLE == 8 && !defined(DJPEG_MULTILINE)
432	0	if (cinfo->quantize_colors \|\|
433	0	(cinfo->out_color_space != JCS_EXT_RGB &&
434	0	#if RGB_RED == 0 && RGB_GREEN == 1 && RGB_BLUE == 2 && RGB_PIXELSIZE == 3
435	0	cinfo->out_color_space != JCS_RGB &&
436	0	#endif
437	0	cinfo->out_color_space != JCS_GRAYSCALE))
438	0	#endif
439	0	{
440		/* When quantizing, we need an output buffer for colormap indexes
441		* that's separate from the physical I/O buffer. We also need a
442		* separate buffer if pixel format translation must take place.
443		*/
444		#if BITS_IN_JSAMPLE == 8 && defined(DJPEG_MULTILINE)
445		/* Allocate the sample array manually to ensure that the rows are
446		* contiguous in memory, which further exercises esoteric code paths in the
447		* library.
448		*/
449		JDIMENSION row_width = cinfo->output_width * cinfo->output_components;
450		dest->pub._buffer = (JSAMPARRAY)(*cinfo->mem->alloc_small)
451		((j_common_ptr)cinfo, JPOOL_IMAGE, 4 * sizeof(JSAMPROW));
452		dest->pub._buffer[0] = (JSAMPROW)(*cinfo->mem->alloc_small)
453		((j_common_ptr)cinfo, JPOOL_IMAGE, row_width * 4);
454		dest->pub._buffer[1] = dest->pub._buffer[0] + row_width;
455		dest->pub._buffer[2] = dest->pub._buffer[1] + row_width;
456		dest->pub._buffer[3] = dest->pub._buffer[2] + row_width;
457		dest->pub.buffer_height = 4;
458		#else
459	0	dest->pub._buffer = (_JSAMPARRAY)(*cinfo->mem->alloc_sarray)
460	0	((j_common_ptr)cinfo, JPOOL_IMAGE,
461	0	cinfo->output_width * cinfo->output_components, (JDIMENSION)1);
462	0	dest->pub.buffer_height = 1;
463	0	#endif
464	0	if (!cinfo->quantize_colors) {
465	0	if (IsExtRGB(cinfo->out_color_space))
466	0	dest->pub.put_pixel_rows = put_rgb;
467		#if BITS_IN_JSAMPLE == 8
468	0	else if (cinfo->out_color_space == JCS_RGB565)
469	0	dest->pub.put_pixel_rows = put_rgb565;
470	0	#endif
471	0	else if (cinfo->out_color_space == JCS_CMYK)
472	0	dest->pub.put_pixel_rows = put_cmyk;
473	0	else
474	0	dest->pub.put_pixel_rows = copy_pixel_rows;
475	0	} else if (cinfo->out_color_space == JCS_GRAYSCALE)
476	0	dest->pub.put_pixel_rows = put_demapped_gray;
477	0	else
478	0	dest->pub.put_pixel_rows = put_demapped_rgb;
479	0	}
480		#if BITS_IN_JSAMPLE == 8 && !defined(DJPEG_MULTILINE)
481	0	else {
482		/* We will fwrite() directly from decompressor output buffer. */
483		/* Synthesize a _JSAMPARRAY pointer structure */
484	0	dest->pixrow = (_JSAMPROW)dest->iobuffer;
485	0	dest->pub._buffer = &dest->pixrow;
486	0	dest->pub.buffer_height = 1;
487	0	dest->pub.put_pixel_rows = put_pixel_rows;
488	0	}
489		#endif
490
491	0	return (djpeg_dest_ptr)dest;
492	0	} Unexecuted instantiation: jinit_write_ppm Unexecuted instantiation: j12init_write_ppm Unexecuted instantiation: j16init_write_ppm
493
494		#endif /* defined(PPM_SUPPORTED) &&
495		(BITS_IN_JSAMPLE != 16 \|\| defined(D_LOSSLESS_SUPPORTED)) */