[imager.git] / imgdouble.c

/*
=head1 NAME

imgdouble.c - implements double per sample images

=head1 SYNOPSIS

  i_img *im = i_img_double_new(int x, int y, int channels);
  # use like a normal image

=head1 DESCRIPTION

Implements double/sample images.

This basic implementation is required so that we have some larger 
sample image type to work with.

=over

=cut
*/

#include "imager.h"
#include "imageri.h"

static int i_ppix_ddoub(i_img *im, int x, int y, const i_color *val);
static int i_gpix_ddoub(i_img *im, int x, int y, i_color *val);
static int i_glin_ddoub(i_img *im, int l, int r, int y, i_color *vals);
static int i_plin_ddoub(i_img *im, int l, int r, int y, const i_color *vals);
static int i_ppixf_ddoub(i_img *im, int x, int y, const i_fcolor *val);
static int i_gpixf_ddoub(i_img *im, int x, int y, i_fcolor *val);
static int i_glinf_ddoub(i_img *im, int l, int r, int y, i_fcolor *vals);
static int i_plinf_ddoub(i_img *im, int l, int r, int y, const i_fcolor *vals);
static int i_gsamp_ddoub(i_img *im, int l, int r, int y, i_sample_t *samps, 
                       int const *chans, int chan_count);
static int i_gsampf_ddoub(i_img *im, int l, int r, int y, i_fsample_t *samps, 
                        int const *chans, int chan_count);

/*
=item IIM_base_16bit_direct

Base structure used to initialize a 16-bit/sample image.

Internal.

=cut
*/
static i_img IIM_base_double_direct =
{
  0, /* channels set */
  0, 0, 0, /* xsize, ysize, bytes */
  ~0U, /* ch_mask */
  i_double_bits, /* bits */
  i_direct_type, /* type */
  0, /* virtual */
  NULL, /* idata */
  { 0, 0, NULL }, /* tags */
  NULL, /* ext_data */

  i_ppix_ddoub, /* i_f_ppix */
  i_ppixf_ddoub, /* i_f_ppixf */
  i_plin_ddoub, /* i_f_plin */
  i_plinf_ddoub, /* i_f_plinf */
  i_gpix_ddoub, /* i_f_gpix */
  i_gpixf_ddoub, /* i_f_gpixf */
  i_glin_ddoub, /* i_f_glin */
  i_glinf_ddoub, /* i_f_glinf */
  i_gsamp_ddoub, /* i_f_gsamp */
  i_gsampf_ddoub, /* i_f_gsampf */

  NULL, /* i_f_gpal */
  NULL, /* i_f_ppal */
  NULL, /* i_f_addcolors */
  NULL, /* i_f_getcolors */
  NULL, /* i_f_colorcount */
  NULL, /* i_f_maxcolors */
  NULL, /* i_f_findcolor */
  NULL, /* i_f_setcolors */

  NULL, /* i_f_destroy */

  i_gsamp_bits_fb,
  NULL, /* i_f_psamp_bits */
};

/*
=item i_img_double_new(int x, int y, int ch)
=category Image creation/destruction
=synopsis i_img *img = i_img_double_new(width, height, channels);

Creates a new double per sample image.

=cut
*/
i_img *i_img_double_new(int x, int y, int ch) {
  int bytes;
  i_img *im;

  mm_log((1,"i_img_double_new(x %d, y %d, ch %d)\n", x, y, ch));

  if (x < 1 || y < 1) {
    i_push_error(0, "Image sizes must be positive");
    return NULL;
  }
  if (ch < 1 || ch > MAXCHANNELS) {
    i_push_errorf(0, "channels must be between 1 and %d", MAXCHANNELS);
    return NULL;
  }
  bytes = x * y * ch * sizeof(double);
  if (bytes / y / ch / sizeof(double) != x) {
    i_push_errorf(0, "integer overflow calculating image allocation");
    return NULL;
  }
  
  im = i_img_alloc();
  *im = IIM_base_double_direct;
  i_tags_new(&im->tags);
  im->xsize = x;
  im->ysize = y;
  im->channels = ch;
  im->bytes = bytes;
  im->ext_data = NULL;
  im->idata = mymalloc(im->bytes);
  memset(im->idata, 0, im->bytes);
  i_img_init(im);
  
  return im;
}

static int i_ppix_ddoub(i_img *im, int x, int y, const i_color *val) {
  int off, ch;

  if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize) 
    return -1;

  off = (x + y * im->xsize) * im->channels;
  if (I_ALL_CHANNELS_WRITABLE(im)) {
    for (ch = 0; ch < im->channels; ++ch)
      ((double*)im->idata)[off+ch] = Sample8ToF(val->channel[ch]);
  }
  else {
    for (ch = 0; ch < im->channels; ++ch)
      if (im->ch_mask & (1<<ch))
	((double*)im->idata)[off+ch] = Sample8ToF(val->channel[ch]);
  }

  return 0;
}

static int i_gpix_ddoub(i_img *im, int x, int y, i_color *val) {
  int off, ch;

  if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize) 
    return -1;

  off = (x + y * im->xsize) * im->channels;
  for (ch = 0; ch < im->channels; ++ch)
    val->channel[ch] = SampleFTo8(((double *)im->idata)[off+ch]);

  return 0;
}

static int i_ppixf_ddoub(i_img *im, int x, int y, const i_fcolor *val) {
  int off, ch;

  if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize) 
    return -1;

  off = (x + y * im->xsize) * im->channels;
  if (I_ALL_CHANNELS_WRITABLE(im)) {
    for (ch = 0; ch < im->channels; ++ch)
      ((double *)im->idata)[off+ch] = val->channel[ch];
  }
  else {
    for (ch = 0; ch < im->channels; ++ch)
      if (im->ch_mask & (1 << ch))
	((double *)im->idata)[off+ch] = val->channel[ch];
  }

  return 0;
}

static int i_gpixf_ddoub(i_img *im, int x, int y, i_fcolor *val) {
  int off, ch;

  if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize) 
    return -1;

  off = (x + y * im->xsize) * im->channels;
  for (ch = 0; ch < im->channels; ++ch)
    val->channel[ch] = ((double *)im->idata)[off+ch];

  return 0;
}

static int i_glin_ddoub(i_img *im, int l, int r, int y, i_color *vals) {
  int ch, count, i;
  int off;
  if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
    if (r > im->xsize)
      r = im->xsize;
    off = (l+y*im->xsize) * im->channels;
    count = r - l;
    for (i = 0; i < count; ++i) {
      for (ch = 0; ch < im->channels; ++ch) {
	vals[i].channel[ch] = SampleFTo8(((double *)im->idata)[off]);
        ++off;
      }
    }
    return count;
  }
  else {
    return 0;
  }
}

static int i_plin_ddoub(i_img *im, int l, int r, int y, const i_color *vals) {
  int ch, count, i;
  int off;
  if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
    if (r > im->xsize)
      r = im->xsize;
    off = (l+y*im->xsize) * im->channels;
    count = r - l;
    if (I_ALL_CHANNELS_WRITABLE(im)) {
      for (i = 0; i < count; ++i) {
	for (ch = 0; ch < im->channels; ++ch) {
	  ((double *)im->idata)[off] = Sample8ToF(vals[i].channel[ch]);
	  ++off;
	}
      }
    }
    else {
      for (i = 0; i < count; ++i) {
	for (ch = 0; ch < im->channels; ++ch) {
	  if (im->ch_mask & (1 << ch))
	    ((double *)im->idata)[off] = Sample8ToF(vals[i].channel[ch]);
	  ++off;
	}
      }
    }
    return count;
  }
  else {
    return 0;
  }
}

static int i_glinf_ddoub(i_img *im, int l, int r, int y, i_fcolor *vals) {
  int ch, count, i;
  int off;
  if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
    if (r > im->xsize)
      r = im->xsize;
    off = (l+y*im->xsize) * im->channels;
    count = r - l;
    for (i = 0; i < count; ++i) {
      for (ch = 0; ch < im->channels; ++ch) {
	vals[i].channel[ch] = ((double *)im->idata)[off];
        ++off;
      }
    }
    return count;
  }
  else {
    return 0;
  }
}

static int i_plinf_ddoub(i_img *im, int l, int r, int y, const i_fcolor *vals) {
  int ch, count, i;
  int off;
  if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
    if (r > im->xsize)
      r = im->xsize;
    off = (l+y*im->xsize) * im->channels;
    count = r - l;
    if (I_ALL_CHANNELS_WRITABLE(im)) {
      for (i = 0; i < count; ++i) {
	for (ch = 0; ch < im->channels; ++ch) {
	  ((double *)im->idata)[off] = vals[i].channel[ch];
	  ++off;
	}
      }
    }
    else {
      for (i = 0; i < count; ++i) {
	for (ch = 0; ch < im->channels; ++ch) {
	  if (im->ch_mask & (1 << ch))
	    ((double *)im->idata)[off] = vals[i].channel[ch];
	  ++off;
	}
      }
    }
    return count;
  }
  else {
    return 0;
  }
}

static int i_gsamp_ddoub(i_img *im, int l, int r, int y, i_sample_t *samps, 
                       int const *chans, int chan_count) {
  int ch, count, i, w;
  int off;

  if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
    if (r > im->xsize)
      r = im->xsize;
    off = (l+y*im->xsize) * im->channels;
    w = r - l;
    count = 0;

    if (chans) {
      /* make sure we have good channel numbers */
      for (ch = 0; ch < chan_count; ++ch) {
        if (chans[ch] < 0 || chans[ch] >= im->channels) {
          i_push_errorf(0, "No channel %d in this image", chans[ch]);
          return 0;
        }
      }
      for (i = 0; i < w; ++i) {
        for (ch = 0; ch < chan_count; ++ch) {
          *samps++ = SampleFTo8(((double *)im->idata)[off+chans[ch]]);
          ++count;
        }
        off += im->channels;
      }
    }
    else {
      if (chan_count <= 0 || chan_count > im->channels) {
	i_push_errorf(0, "chan_count %d out of range, must be >0, <= channels", 
		      chan_count);
	return 0;
      }
      for (i = 0; i < w; ++i) {
        for (ch = 0; ch < chan_count; ++ch) {
          *samps++ = SampleFTo8(((double *)im->idata)[off+ch]);
          ++count;
        }
        off += im->channels;
      }
    }

    return count;
  }
  else {
    return 0;
  }
}

static int i_gsampf_ddoub(i_img *im, int l, int r, int y, i_fsample_t *samps, 
                        int const *chans, int chan_count) {
  int ch, count, i, w;
  int off;

  if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
    if (r > im->xsize)
      r = im->xsize;
    off = (l+y*im->xsize) * im->channels;
    w = r - l;
    count = 0;

    if (chans) {
      /* make sure we have good channel numbers */
      for (ch = 0; ch < chan_count; ++ch) {
        if (chans[ch] < 0 || chans[ch] >= im->channels) {
          i_push_errorf(0, "No channel %d in this image", chans[ch]);
          return 0;
        }
      }
      for (i = 0; i < w; ++i) {
        for (ch = 0; ch < chan_count; ++ch) {
          *samps++ = ((double *)im->idata)[off+chans[ch]];
          ++count;
        }
        off += im->channels;
      }
    }
    else {
      if (chan_count <= 0 || chan_count > im->channels) {
	i_push_errorf(0, "chan_count %d out of range, must be >0, <= channels", 
		      chan_count);
	return 0;
      }
      for (i = 0; i < w; ++i) {
        for (ch = 0; ch < chan_count; ++ch) {
          *samps++ = ((double *)im->idata)[off+ch];
          ++count;
        }
        off += im->channels;
      }
    }

    return count;
  }
  else {
    return 0;
  }
}


/*
=back

=head1 AUTHOR

Tony Cook <tony@develop-help.com>

=head1 SEE ALSO

Imager(3)

=cut
*/
Commit	Line	Data
2ce44e2a TC	1	/*
	2	=head1 NAME
	3
	4	imgdouble.c - implements double per sample images
	5
	6	=head1 SYNOPSIS
	7
	8	i_img *im = i_img_double_new(int x, int y, int channels);
	9	# use like a normal image
	10
	11	=head1 DESCRIPTION
	12
	13	Implements double/sample images.
	14
	15	This basic implementation is required so that we have some larger
	16	sample image type to work with.
	17
	18	=over
	19
	20	=cut
	21	*/
	22
92bda632 TC	23	#include "imager.h"
92bda632 TC	24	#include "imageri.h"
2ce44e2a	25
97ac0a96	26	static int i_ppix_ddoub(i_img im, int x, int y, const i_color val);
2ce44e2a TC	27	static int i_gpix_ddoub(i_img im, int x, int y, i_color val);
2ce44e2a TC	28	static int i_glin_ddoub(i_img im, int l, int r, int y, i_color vals);
97ac0a96 TC	29	static int i_plin_ddoub(i_img im, int l, int r, int y, const i_color vals);
97ac0a96 TC	30	static int i_ppixf_ddoub(i_img im, int x, int y, const i_fcolor val);
2ce44e2a TC	31	static int i_gpixf_ddoub(i_img im, int x, int y, i_fcolor val);
2ce44e2a TC	32	static int i_glinf_ddoub(i_img im, int l, int r, int y, i_fcolor vals);
97ac0a96	33	static int i_plinf_ddoub(i_img im, int l, int r, int y, const i_fcolor vals);
2ce44e2a	34	static int i_gsamp_ddoub(i_img im, int l, int r, int y, i_sample_t samps,
18accb2a	35	int const *chans, int chan_count);
2ce44e2a	36	static int i_gsampf_ddoub(i_img im, int l, int r, int y, i_fsample_t samps,
18accb2a	37	int const *chans, int chan_count);
2ce44e2a TC	38
	39	/*
	40	=item IIM_base_16bit_direct
	41
	42	Base structure used to initialize a 16-bit/sample image.
	43
	44	Internal.
	45
	46	=cut
	47	*/
	48	static i_img IIM_base_double_direct =
	49	{
	50	0, /* channels set */
	51	0, 0, 0, /* xsize, ysize, bytes */
9a88a5e6	52	~0U, /* ch_mask */
2ce44e2a TC	53	i_double_bits, /* bits */
	54	i_direct_type, /* type */
	55	0, /* virtual */
	56	NULL, /* idata */
	57	{ 0, 0, NULL }, /* tags */
	58	NULL, /* ext_data */
	59
	60	i_ppix_ddoub, /* i_f_ppix */
	61	i_ppixf_ddoub, /* i_f_ppixf */
	62	i_plin_ddoub, /* i_f_plin */
	63	i_plinf_ddoub, /* i_f_plinf */
	64	i_gpix_ddoub, /* i_f_gpix */
	65	i_gpixf_ddoub, /* i_f_gpixf */
	66	i_glin_ddoub, /* i_f_glin */
	67	i_glinf_ddoub, /* i_f_glinf */
	68	i_gsamp_ddoub, /* i_f_gsamp */
	69	i_gsampf_ddoub, /* i_f_gsampf */
	70
	71	NULL, /* i_f_gpal */
	72	NULL, /* i_f_ppal */
bd8052a6 TC	73	NULL, /* i_f_addcolors */
bd8052a6 TC	74	NULL, /* i_f_getcolors */
2ce44e2a	75	NULL, /* i_f_colorcount */
bd8052a6	76	NULL, /* i_f_maxcolors */
2ce44e2a	77	NULL, /* i_f_findcolor */
bd8052a6	78	NULL, /* i_f_setcolors */
2ce44e2a TC	79
2ce44e2a TC	80	NULL, /* i_f_destroy */
bd8052a6 TC	81
	82	i_gsamp_bits_fb,
	83	NULL, /* i_f_psamp_bits */
2ce44e2a TC	84	};
	85
	86	/*
	87	=item i_img_double_new(int x, int y, int ch)
9167a5c6 TC	88	=category Image creation/destruction
9167a5c6 TC	89	=synopsis i_img *img = i_img_double_new(width, height, channels);
92bda632	90
2ce44e2a TC	91	Creates a new double per sample image.
	92
	93	=cut
	94	*/
bd8052a6	95	i_img *i_img_double_new(int x, int y, int ch) {
653ea321	96	int bytes;
bd8052a6	97	i_img *im;
653ea321	98
2ce44e2a	99	mm_log((1,"i_img_double_new(x %d, y %d, ch %d)\n", x, y, ch));
1501d9b3 TC	100
	101	if (x < 1 \|\| y < 1) {
	102	i_push_error(0, "Image sizes must be positive");
	103	return NULL;
	104	}
	105	if (ch < 1 \|\| ch > MAXCHANNELS) {
	106	i_push_errorf(0, "channels must be between 1 and %d", MAXCHANNELS);
	107	return NULL;
	108	}
653ea321 TC	109	bytes = x * y * ch * sizeof(double);
	110	if (bytes / y / ch / sizeof(double) != x) {
	111	i_push_errorf(0, "integer overflow calculating image allocation");
	112	return NULL;
	113	}
2ce44e2a	114
bd8052a6	115	im = i_img_alloc();
2ce44e2a TC	116	*im = IIM_base_double_direct;
	117	i_tags_new(&im->tags);
	118	im->xsize = x;
	119	im->ysize = y;
	120	im->channels = ch;
653ea321	121	im->bytes = bytes;
2ce44e2a TC	122	im->ext_data = NULL;
2ce44e2a TC	123	im->idata = mymalloc(im->bytes);
bd8052a6 TC	124	memset(im->idata, 0, im->bytes);
bd8052a6 TC	125	i_img_init(im);
2ce44e2a TC	126
	127	return im;
	128	}
	129
97ac0a96	130	static int i_ppix_ddoub(i_img im, int x, int y, const i_color val) {
2ce44e2a TC	131	int off, ch;
2ce44e2a TC	132
837a4b43	133	if (x < 0 \|\| x >= im->xsize \|\| y < 0 \|\| y >= im->ysize)
2ce44e2a TC	134	return -1;
	135
	136	off = (x + y * im->xsize) * im->channels;
35f40526 TC	137	if (I_ALL_CHANNELS_WRITABLE(im)) {
	138	for (ch = 0; ch < im->channels; ++ch)
	139	((double*)im->idata)[off+ch] = Sample8ToF(val->channel[ch]);
	140	}
	141	else {
	142	for (ch = 0; ch < im->channels; ++ch)
	143	if (im->ch_mask & (1<<ch))
	144	((double*)im->idata)[off+ch] = Sample8ToF(val->channel[ch]);
	145	}
2ce44e2a TC	146
	147	return 0;
	148	}
	149
	150	static int i_gpix_ddoub(i_img im, int x, int y, i_color val) {
	151	int off, ch;
	152
837a4b43	153	if (x < 0 \|\| x >= im->xsize \|\| y < 0 \|\| y >= im->ysize)
2ce44e2a TC	154	return -1;
	155
	156	off = (x + y * im->xsize) * im->channels;
	157	for (ch = 0; ch < im->channels; ++ch)
	158	val->channel[ch] = SampleFTo8(((double *)im->idata)[off+ch]);
	159
	160	return 0;
	161	}
	162
97ac0a96	163	static int i_ppixf_ddoub(i_img im, int x, int y, const i_fcolor val) {
2ce44e2a TC	164	int off, ch;
2ce44e2a TC	165
837a4b43	166	if (x < 0 \|\| x >= im->xsize \|\| y < 0 \|\| y >= im->ysize)
2ce44e2a TC	167	return -1;
	168
	169	off = (x + y * im->xsize) * im->channels;
35f40526 TC	170	if (I_ALL_CHANNELS_WRITABLE(im)) {
	171	for (ch = 0; ch < im->channels; ++ch)
	172	((double *)im->idata)[off+ch] = val->channel[ch];
	173	}
	174	else {
	175	for (ch = 0; ch < im->channels; ++ch)
	176	if (im->ch_mask & (1 << ch))
	177	((double *)im->idata)[off+ch] = val->channel[ch];
	178	}
2ce44e2a TC	179
	180	return 0;
	181	}
	182
	183	static int i_gpixf_ddoub(i_img im, int x, int y, i_fcolor val) {
	184	int off, ch;
	185
837a4b43	186	if (x < 0 \|\| x >= im->xsize \|\| y < 0 \|\| y >= im->ysize)
2ce44e2a TC	187	return -1;
	188
	189	off = (x + y * im->xsize) * im->channels;
	190	for (ch = 0; ch < im->channels; ++ch)
	191	val->channel[ch] = ((double *)im->idata)[off+ch];
	192
	193	return 0;
	194	}
	195
	196	static int i_glin_ddoub(i_img im, int l, int r, int y, i_color vals) {
	197	int ch, count, i;
	198	int off;
	199	if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
	200	if (r > im->xsize)
	201	r = im->xsize;
	202	off = (l+yim->xsize) im->channels;
	203	count = r - l;
	204	for (i = 0; i < count; ++i) {
	205	for (ch = 0; ch < im->channels; ++ch) {
	206	vals[i].channel[ch] = SampleFTo8(((double *)im->idata)[off]);
	207	++off;
	208	}
	209	}
	210	return count;
	211	}
	212	else {
	213	return 0;
	214	}
	215	}
	216
97ac0a96	217	static int i_plin_ddoub(i_img im, int l, int r, int y, const i_color vals) {
2ce44e2a TC	218	int ch, count, i;
	219	int off;
	220	if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
	221	if (r > im->xsize)
	222	r = im->xsize;
	223	off = (l+yim->xsize) im->channels;
	224	count = r - l;
35f40526 TC	225	if (I_ALL_CHANNELS_WRITABLE(im)) {
	226	for (i = 0; i < count; ++i) {
	227	for (ch = 0; ch < im->channels; ++ch) {
	228	((double *)im->idata)[off] = Sample8ToF(vals[i].channel[ch]);
	229	++off;
	230	}
	231	}
	232	}
	233	else {
	234	for (i = 0; i < count; ++i) {
	235	for (ch = 0; ch < im->channels; ++ch) {
	236	if (im->ch_mask & (1 << ch))
	237	((double *)im->idata)[off] = Sample8ToF(vals[i].channel[ch]);
	238	++off;
	239	}
2ce44e2a TC	240	}
	241	}
	242	return count;
	243	}
	244	else {
	245	return 0;
	246	}
	247	}
	248
	249	static int i_glinf_ddoub(i_img im, int l, int r, int y, i_fcolor vals) {
	250	int ch, count, i;
	251	int off;
	252	if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
	253	if (r > im->xsize)
	254	r = im->xsize;
	255	off = (l+yim->xsize) im->channels;
	256	count = r - l;
	257	for (i = 0; i < count; ++i) {
	258	for (ch = 0; ch < im->channels; ++ch) {
	259	vals[i].channel[ch] = ((double *)im->idata)[off];
	260	++off;
	261	}
	262	}
	263	return count;
	264	}
	265	else {
	266	return 0;
	267	}
	268	}
	269
97ac0a96	270	static int i_plinf_ddoub(i_img im, int l, int r, int y, const i_fcolor vals) {
2ce44e2a TC	271	int ch, count, i;
	272	int off;
	273	if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
	274	if (r > im->xsize)
	275	r = im->xsize;
	276	off = (l+yim->xsize) im->channels;
	277	count = r - l;
35f40526 TC	278	if (I_ALL_CHANNELS_WRITABLE(im)) {
	279	for (i = 0; i < count; ++i) {
	280	for (ch = 0; ch < im->channels; ++ch) {
	281	((double *)im->idata)[off] = vals[i].channel[ch];
	282	++off;
	283	}
	284	}
	285	}
	286	else {
	287	for (i = 0; i < count; ++i) {
	288	for (ch = 0; ch < im->channels; ++ch) {
	289	if (im->ch_mask & (1 << ch))
	290	((double *)im->idata)[off] = vals[i].channel[ch];
	291	++off;
	292	}
2ce44e2a TC	293	}
	294	}
	295	return count;
	296	}
	297	else {
	298	return 0;
	299	}
	300	}
	301
	302	static int i_gsamp_ddoub(i_img im, int l, int r, int y, i_sample_t samps,
18accb2a	303	int const *chans, int chan_count) {
2ce44e2a TC	304	int ch, count, i, w;
	305	int off;
	306
	307	if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
	308	if (r > im->xsize)
	309	r = im->xsize;
	310	off = (l+yim->xsize) im->channels;
	311	w = r - l;
	312	count = 0;
	313
	314	if (chans) {
	315	/* make sure we have good channel numbers */
	316	for (ch = 0; ch < chan_count; ++ch) {
	317	if (chans[ch] < 0 \|\| chans[ch] >= im->channels) {
	318	i_push_errorf(0, "No channel %d in this image", chans[ch]);
	319	return 0;
	320	}
	321	}
	322	for (i = 0; i < w; ++i) {
	323	for (ch = 0; ch < chan_count; ++ch) {
	324	samps++ = SampleFTo8(((double )im->idata)[off+chans[ch]]);
	325	++count;
	326	}
	327	off += im->channels;
	328	}
	329	}
	330	else {
c7481ae1 TC	331	if (chan_count <= 0 \|\| chan_count > im->channels) {
	332	i_push_errorf(0, "chan_count %d out of range, must be >0, <= channels",
	333	chan_count);
	334	return 0;
	335	}
2ce44e2a TC	336	for (i = 0; i < w; ++i) {
	337	for (ch = 0; ch < chan_count; ++ch) {
	338	samps++ = SampleFTo8(((double )im->idata)[off+ch]);
	339	++count;
	340	}
	341	off += im->channels;
	342	}
	343	}
	344
	345	return count;
	346	}
	347	else {
	348	return 0;
	349	}
	350	}
	351
	352	static int i_gsampf_ddoub(i_img im, int l, int r, int y, i_fsample_t samps,
18accb2a	353	int const *chans, int chan_count) {
2ce44e2a TC	354	int ch, count, i, w;
	355	int off;
	356
	357	if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
	358	if (r > im->xsize)
	359	r = im->xsize;
	360	off = (l+yim->xsize) im->channels;
	361	w = r - l;
	362	count = 0;
	363
	364	if (chans) {
	365	/* make sure we have good channel numbers */
	366	for (ch = 0; ch < chan_count; ++ch) {
	367	if (chans[ch] < 0 \|\| chans[ch] >= im->channels) {
	368	i_push_errorf(0, "No channel %d in this image", chans[ch]);
	369	return 0;
	370	}
	371	}
	372	for (i = 0; i < w; ++i) {
	373	for (ch = 0; ch < chan_count; ++ch) {
	374	samps++ = ((double )im->idata)[off+chans[ch]];
	375	++count;
	376	}
	377	off += im->channels;
	378	}
	379	}
	380	else {
c7481ae1 TC	381	if (chan_count <= 0 \|\| chan_count > im->channels) {
	382	i_push_errorf(0, "chan_count %d out of range, must be >0, <= channels",
	383	chan_count);
	384	return 0;
	385	}
2ce44e2a TC	386	for (i = 0; i < w; ++i) {
	387	for (ch = 0; ch < chan_count; ++ch) {
	388	samps++ = ((double )im->idata)[off+ch];
	389	++count;
	390	}
	391	off += im->channels;
	392	}
	393	}
	394
	395	return count;
	396	}
	397	else {
	398	return 0;
	399	}
	400	}
	401
b8c2033e AMH	402
	403	/*
	404	=back
	405
	406	=head1 AUTHOR
	407
	408	Tony Cook <tony@develop-help.com>
	409
	410	=head1 SEE ALSO
	411
	412	Imager(3)
	413
	414	=cut
	415	*/