summaryrefslogtreecommitdiff
path: root/support/dktools/dk3pixre.ctr
blob: d5fb73866e144c5d3c0fd08b4d0ee73c8dd03f5b (plain)
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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
%%	options

copyright owner	=	Dirk Krause
copyright year	=	2011-xxxx
license		=	bsd



%%	header

#ifdef __cplusplus
extern "C" {
#endif

/**	Set up resampling structure.
	This function must be called before you start
	any conversion using dk3pixre_convert().
	@param	pp	Resampling structure.
	@param	inw	Input number of bits per component.
	@param	outw	Output number of bits per component.
	@return	1 on success, 0 on error.
*/
int
dk3pixre_set(dk3_pixel_resample_t *pp, size_t inw, size_t outw);

/**	Check whether a pixel value can be converted without quality loss.
	@param	pp	Pixel resampling structure.
	@param	inval	Value to convert.
	@return	1 on success, 0 on error.
*/
int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval);

/**	Resample pixel. The dk3_pixel_resample_t structure must
	already be set up using dk3pixre_set().
	@param	pp	Resampling structure.
	@param	inval	Value to resample.
	@return	Pixel component resampled.
*/
dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval);

/**	Get mask for maximum output value.
	@param	pp	Resampling structure.
	@return	Maximum value for given number of output bits.
*/
dk3_bif_pixel_t
dk3pixre_get_max_value(dk3_pixel_resample_t const *pp);

/**	Get one pixel component value from packed bytes.
	@param	row	Pixel data.
	@param	vi	Value index.
	@param	bpc	Number of bits per component.
	@return	Pixel component value.
*/
dk3_bif_pixel_t
dk3pixre_get_value_from_packed_bytes(
  unsigned char const	*row,
  dk3_bif_coord_t	 vi,
  size_t		 bpc
);

/**	Get maximum pixel value for a given bit width.
	@param	w	Bit width.
	@return	Maximum value on success, 0 on error.
*/
dk3_bif_pixel_t
dk3pixre_maximum_for_width(size_t w);

#ifdef __cplusplus
}
#endif

%%	module

#include "dk3all.h"
#include "dk3pixre.h"



$!trace-include



dk3_bif_pixel_t
dk3pixre_maximum_for_width(size_t w)
{
  dk3_bif_pixel_t	back	= 0;
  unsigned		val	= 1;
  size_t		i;
  for(i = 0; i < w; i++) {
    val = val * 2;
  }
  if(val) {
    val--;
    back = (dk3_bif_pixel_t)val;
#if VERSION_BEFORE_20140809
    if (((unsigned)back) != val) {
      back = 0;
    }
#else
    if (val > (unsigned)(DK3_US_MAX)) {
      back = 0;
    }
#endif
  }
  return back;
}



int
dk3pixre_set(dk3_pixel_resample_t *pp, size_t inw, size_t outw)
{
  int			back	= 0;
  dk3_bif_pixel_t	im;
  dk3_bif_pixel_t	om;

  if (pp) {
    im = dk3pixre_maximum_for_width(inw);
    om = dk3pixre_maximum_for_width(outw);
    if ((im) && (om)) {
      pp->iw = inw;
      pp->ow = outw;
      pp->im = im;
      pp->om = om;
      pp->im2 = im / 2;
      back = 1;
    }
  }
  return back;
}



#if DK3_SIZEOF_INT >= (2 * DK3_SIZEOF_BIF_PIXEL_T)

/* BEGIN unsigned */

dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned		counter;
  unsigned		res;
  unsigned		rem;
  int			ec	= 0;
  dk3_bif_pixel_t	back;
  back = inval;
  if (pp) {
    if (pp->iw != pp->ow) {
      if (1 < pp->ow) {
        counter = dk3ma_ui_mul_ok(
          (unsigned)inval,
          (unsigned)(pp->om),
          &ec
        );
        if (0 == ec) {
          if (pp->im) {
            res = counter / (unsigned)(pp->im);
	    rem = counter % (unsigned)(pp->im);
	    if (rem > ((unsigned)(pp->im2))) { res++; }
	    back = (dk3_bif_pixel_t)res;
#if VERSION_BEFORE_20140809
	    if (((unsigned)back) != res) {
	      back = 0;
	    }
#else
	    if (res > (unsigned)(DK3_US_MAX)) {
	      back = 0;
	    }
#endif
          }
        }
      } else {
        back = ((inval > pp->im2) ? 1 : 0);
      }
    }
  }
  return back;
}



int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned		counter;
  unsigned		rem;
  unsigned		res;
  int			ec	= 0;
  int			back	= 0;
#if VERSION_BEFORE_20140809
  dk3_bif_pixel_t	tv;
#endif
  if (pp) {
    if (pp->iw != pp->ow) {
      if (1 < pp->ow) {
        counter = dk3ma_ui_mul_ok(
          (unsigned)inval,
	  (unsigned)(pp->om),
	  &ec
        );
        if (0 == ec) {
          if (pp->im) {
	    res = counter / (unsigned)(pp->im);
	    rem = counter % (unsigned)(pp->im);
	    if (0 == rem) {
#if VERSION_BEFORE_20140809
	      tv = (dk3_bif_pixel_t)res;
	      if (((unsigned)tv) == res) {
	        back = 1;
	      }
#else
	      if (res <= (unsigned)(DK3_US_MAX)) {
	        back = 1;
	      }
#endif
	    }
	  }
        }
      } else {
        if ((0 == inval) || (pp->im == inval)) { back = 1; }
      }
    } else {
      back = 1;
    }
  }
  return back;
}

/* END unsigned */

#else
#if DK3_SIZEOF_LONG >= (2 * DK3_SIZEOF_BIF_PIXEL_T)

/* BEGIN unsigned long */

dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned long		counter;
  unsigned long		res;
  unsigned long		rem;
  int			ec	= 0;
  dk3_bif_pixel_t	back;
  back = inval;
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_ul_mul_ok(
        (unsigned long)inval,
        (unsigned long)(pp->om),
        &ec
      );
      if (0 == ec) {
        if (pp->im) {
          res = counter / (unsigned long)(pp->im);
	  rem = counter % (unsigned long)(pp->im);
	  if (rem > (((unsigned long)(pp->im)) / 2UL)) { res++; }
	  back = (dk3_bif_pixel_t)res;
#if VERSION_BEFORE_20140809
	  if (((unsigned long)back) != res) {
	    back = 0;
	  }
#else
	  if (res > (unsigned long)(DK3_US_MAX)) {
	    back = 0;
	  }
#endif
        }
      }
    }
  }
  return back;
}



int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  unsigned long		counter;
  unsigned long		rem;
  unsigned long		res;
  int			ec	= 0;
  int			back	= 0;
#if VERSION_BEFORE_20140809
  dk3_bif_pixel_t	tv;
#endif
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_ul_mul_ok(
        (unsigned long)inval,
	(unsigned long)(pp->om),
	&ec
      );
      if (0 == ec) {
        if (pp->im) {
	  res = counter / (unsigned long)(pp->im);
	  rem = counter % (unsigned long)(pp->im);
	  if (0 == rem) {
#if VERSION_BEFORE_20140809
	    tv = (dk3_bif_pixel_t)res;
	    if (((unsigned long)tv) == res) {
	      back = 1;
	    }
#else
	    if (res <= (unsigned long)(DK3_US_MAX)) {
	      back = 1;
	    }
#endif
	  }
	}
      }
    } else {
      back = 1;
    }
  }
  return back;
}

/* END unsigned long */

#else

/* BEGIN dk3_um_t */

dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  dk3_um_t		counter;
  dk3_um_t		res;
  dk3_um_t		rem;
  int			ec	= 0;
  dk3_bif_pixel_t	back;
  back = inval;
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_um_mul_ok(
        (dk3_um_t)inval,
        (dk3_um_t)(pp->om),
        &ec
      );
      if (0 == ec) {
        if (pp->im) {
          res = counter / (dk3_um_t)(pp->im);
	  rem = counter % (dk3_um_t)(pp->im);
	  if (rem > (((dk3_um_t)(pp->im)) / DK3_UM_2)) { res++; }
	  back = (dk3_bif_pixel_t)res;
	  if (((dk3_um_t)back) != res) {
	    back = 0;
	  }
        }
      }
    }
  }
  return back;
}



int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
  dk3_um_t		counter;
  dk3_um_t		rem;
  dk3_um_t		res;
  int			ec	= 0;
  int			back	= 0;
  dk3_bif_pixel_t	tv;
  if (pp) {
    if (pp->iw != pp->ow) {
      counter = dk3ma_um_mul_ok(
        (dk3_um_t)inval,
	(dk3_um_t)(pp->om),
	&ec
      );
      if (0 == ec) {
        if (pp->im) {
	  res = counter / (dk3_um_t)(pp->im);
	  rem = counter % (dk3_um_t)(pp->im);
	  if (0 == rem) {
	    tv = (dk3_bif_pixel_t)res;
	    if (((dk3_um_t)tv) == res) {
	      back = 1;
	    }
	  }
	}
      }
    } else {
      back = 1;
    }
  }
  return back;
}

/* END dk3_um_t */

#endif
#endif


dk3_bif_pixel_t
dk3pixre_get_value_from_packed_bytes(
  unsigned char const	*row,
  dk3_bif_coord_t	 vi,
  size_t		 bpc
)
{
  unsigned short const	*us;
  unsigned char		 uc;
  dk3_bif_coord_t	 byteindex;
  dk3_bif_coord_t	 inbyte;

  dk3_bif_pixel_t	back = (dk3_bif_pixel_t)0;
  switch(bpc) {
    case 16: {
      us = (unsigned short const *)row;
      back = us[vi];
    } break;
    case 8: {
      back =  (dk3_bif_pixel_t)(row[vi]);
      back &= 0x00FFU;
    } break;
    case 4: {
      byteindex = vi / 2L;
      inbyte    = vi % 2L;
      uc = row[byteindex];
      switch((int)inbyte) {
        case 0: {
	  uc = uc >> 4;
	} break;
      }
      back = (dk3_bif_pixel_t)uc;
      back &= 0x000FU;
    } break;
    case 2: {
      byteindex = vi / 4L;
      inbyte    = vi % 4L;
      uc = row[byteindex];
      switch((int)inbyte) {
        case 0: {
	  uc = uc >> 6;
	} break;
	case 1: {
	  uc = uc >> 4;
	} break;
	case 2: {
	  uc = uc >> 2;
	} break;
      }
      back = (dk3_bif_pixel_t)uc;
      back &= 0x0003U;
    } break;
    case 1: {
      byteindex = vi / 8L;
      inbyte    = vi % 8L;
      uc = row[byteindex];
      switch((int)inbyte) {
        case 0: { uc = uc >> 7; } break;
	case 1: { uc = uc >> 6; } break;
	case 2: { uc = uc >> 5; } break;
	case 3: { uc = uc >> 4; } break;
	case 4: { uc = uc >> 3; } break;
	case 5: { uc = uc >> 2; } break;
	case 6: { uc = uc >> 1; } break;
      }
      back = (dk3_bif_pixel_t)uc;
      back &= 0x0001U;
    } break;
  }
  return back;
}



dk3_bif_pixel_t
dk3pixre_get_max_value(dk3_pixel_resample_t const *pp)
{
  dk3_bif_pixel_t back = (dk3_bif_pixel_t)0U;
  if(pp) {
    back = pp->om;
  }
  return back;
}