MagickCore  6.9.10
Convert, Edit, Or Compose Bitmap Images
quantum-private.h
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1 /*
2  Copyright 1999-2018 ImageMagick Studio LLC, a non-profit organization
3  dedicated to making software imaging solutions freely available.
4 
5  You may not use this file except in compliance with the License.
6  obtain a copy of the License at
7 
8  https://www.imagemagick.org/script/license.php
9 
10  Unless required by applicable law or agreed to in writing, software
11  distributed under the License is distributed on an "AS IS" BASIS,
12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  See the License for the specific language governing permissions and
14  limitations under the License.
15 
16  MagickCore quantum inline methods.
17 */
18 #ifndef MAGICKCORE_QUANTUM_PRIVATE_H
19 #define MAGICKCORE_QUANTUM_PRIVATE_H
20 
21 #include "magick/memory_.h"
22 #include "magick/cache.h"
23 #include "magick/image-private.h"
24 #include "magick/pixel-accessor.h"
25 
26 #if defined(__cplusplus) || defined(c_plusplus)
27 extern "C" {
28 #endif
29 
30 typedef struct _QuantumState
31 {
32  double
34 
35  unsigned int
37 
38  size_t
40 
41  const unsigned int
42  *mask;
43 } QuantumState;
44 
46 {
47  size_t
48  depth,
49  quantum;
50 
53 
54  double
55  minimum,
56  maximum,
57  scale;
58 
59  size_t
60  pad;
61 
63  min_is_white,
64  pack;
65 
68 
69  size_t
71 
73  **pixels;
74 
75  size_t
77 
80 
83 
86 
87  size_t
89 };
90 
91 extern MagickPrivate void
93 
94 static inline MagickSizeType GetQuantumRange(const size_t depth)
95 {
97  one;
98 
99  size_t
100  max_depth;
101 
102  if (depth == 0)
103  return(0);
104  one=1;
105  max_depth=8*sizeof(MagickSizeType);
106  return((MagickSizeType) ((one << (MagickMin(depth,max_depth)-1))+
107  ((one << (MagickMin(depth,max_depth)-1))-1)));
108 }
109 
110 static inline float HalfToSinglePrecision(const unsigned short half)
111 {
112 #define ExponentBias (127-15)
113 #define ExponentMask 0x7c00
114 #define ExponentShift 23
115 #define SignBitShift 31
116 #define SignificandShift 13
117 #define SignificandMask 0x00000400
118 
119  typedef union _SinglePrecision
120  {
121  unsigned int
122  fixed_point;
123 
124  float
125  single_precision;
126  } SinglePrecision;
127 
128  register unsigned int
129  exponent,
130  significand,
131  sign_bit;
132 
133  SinglePrecision
134  map;
135 
136  unsigned int
137  value;
138 
139  /*
140  The IEEE 754 standard specifies half precision as having:
141 
142  Sign bit: 1 bit
143  Exponent width: 5 bits
144  Significand precision: 11 (10 explicitly stored)
145  */
146  sign_bit=(unsigned int) ((half >> 15) & 0x00000001);
147  exponent=(unsigned int) ((half >> 10) & 0x0000001f);
148  significand=(unsigned int) (half & 0x000003ff);
149  if (exponent == 0)
150  {
151  if (significand == 0)
152  value=sign_bit << SignBitShift;
153  else
154  {
155  while ((significand & SignificandMask) == 0)
156  {
157  significand<<=1;
158  exponent--;
159  }
160  exponent++;
161  significand&=(~SignificandMask);
162  exponent+=ExponentBias;
163  value=(sign_bit << SignBitShift) | (exponent << ExponentShift) |
164  (significand << SignificandShift);
165  }
166  }
167  else
168  if (exponent == SignBitShift)
169  {
170  value=(sign_bit << SignBitShift) | 0x7f800000;
171  if (significand != 0)
172  value|=(significand << SignificandShift);
173  }
174  else
175  {
176  exponent+=ExponentBias;
177  significand<<=SignificandShift;
178  value=(sign_bit << SignBitShift) | (exponent << ExponentShift) |
179  significand;
180  }
181  map.fixed_point=value;
182  return(map.single_precision);
183 }
184 
185 static inline unsigned char *PopCharPixel(const unsigned char pixel,
186  unsigned char *pixels)
187 {
188  *pixels++=pixel;
189  return(pixels);
190 }
191 
192 static inline unsigned char *PopLongPixel(const EndianType endian,
193  const unsigned int pixel,unsigned char *pixels)
194 {
195  register unsigned int
196  quantum;
197 
198  quantum=(unsigned int) pixel;
199  if (endian == LSBEndian)
200  {
201  *pixels++=(unsigned char) (quantum);
202  *pixels++=(unsigned char) (quantum >> 8);
203  *pixels++=(unsigned char) (quantum >> 16);
204  *pixels++=(unsigned char) (quantum >> 24);
205  return(pixels);
206  }
207  *pixels++=(unsigned char) (quantum >> 24);
208  *pixels++=(unsigned char) (quantum >> 16);
209  *pixels++=(unsigned char) (quantum >> 8);
210  *pixels++=(unsigned char) (quantum);
211  return(pixels);
212 }
213 
214 static inline unsigned char *PopShortPixel(const EndianType endian,
215  const unsigned short pixel,unsigned char *pixels)
216 {
217  register unsigned int
218  quantum;
219 
220  quantum=pixel;
221  if (endian == LSBEndian)
222  {
223  *pixels++=(unsigned char) (quantum);
224  *pixels++=(unsigned char) (quantum >> 8);
225  return(pixels);
226  }
227  *pixels++=(unsigned char) (quantum >> 8);
228  *pixels++=(unsigned char) (quantum);
229  return(pixels);
230 }
231 
232 static inline const unsigned char *PushCharPixel(const unsigned char *pixels,
233  unsigned char *pixel)
234 {
235  *pixel=(*pixels++);
236  return(pixels);
237 }
238 
239 static inline const unsigned char *PushLongPixel(const EndianType endian,
240  const unsigned char *pixels,unsigned int *pixel)
241 {
242  register unsigned int
243  quantum;
244 
245  if (endian == LSBEndian)
246  {
247  quantum=((unsigned int) *pixels++);
248  quantum|=((unsigned int) *pixels++ << 8);
249  quantum|=((unsigned int) *pixels++ << 16);
250  quantum|=((unsigned int) *pixels++ << 24);
251  *pixel=quantum;
252  return(pixels);
253  }
254  quantum=((unsigned int) *pixels++ << 24);
255  quantum|=((unsigned int) *pixels++ << 16);
256  quantum|=((unsigned int) *pixels++ << 8);
257  quantum|=((unsigned int) *pixels++);
258  *pixel=quantum;
259  return(pixels);
260 }
261 
262 static inline const unsigned char *PushShortPixel(const EndianType endian,
263  const unsigned char *pixels,unsigned short *pixel)
264 {
265  register unsigned int
266  quantum;
267 
268  if (endian == LSBEndian)
269  {
270  quantum=(unsigned int) *pixels++;
271  quantum|=(unsigned int) (*pixels++ << 8);
272  *pixel=(unsigned short) (quantum & 0xffff);
273  return(pixels);
274  }
275  quantum=(unsigned int) (*pixels++ << 8);
276  quantum|=(unsigned int) *pixels++;
277  *pixel=(unsigned short) (quantum & 0xffff);
278  return(pixels);
279 }
280 
281 static inline Quantum ScaleAnyToQuantum(const QuantumAny quantum,
282  const QuantumAny range)
283 {
284  if (quantum > range)
285  return(QuantumRange);
286 #if !defined(MAGICKCORE_HDRI_SUPPORT)
287  return((Quantum) (((MagickRealType) QuantumRange*quantum)*
288  PerceptibleReciprocal((double) range)+0.5));
289 #else
290  return((Quantum) (((MagickRealType) QuantumRange*quantum)*
291  PerceptibleReciprocal((double) range)));
292 #endif
293 }
294 
295 static inline QuantumAny ScaleQuantumToAny(const Quantum quantum,
296  const QuantumAny range)
297 {
298  return((QuantumAny) (((MagickRealType) range*quantum)/QuantumRange+0.5));
299 }
300 
301 #if (MAGICKCORE_QUANTUM_DEPTH == 8)
302 static inline Quantum ScaleCharToQuantum(const unsigned char value)
303 {
304  return((Quantum) value);
305 }
306 
307 static inline Quantum ScaleLongToQuantum(const unsigned int value)
308 {
309 #if !defined(MAGICKCORE_HDRI_SUPPORT)
310  return((Quantum) ((value)/16843009UL));
311 #else
312  return((Quantum) (value/16843009.0));
313 #endif
314 }
315 
316 static inline Quantum ScaleMapToQuantum(const MagickRealType value)
317 {
318  if (value <= 0.0)
319  return((Quantum) 0);
320  if (value >= MaxMap)
321  return(QuantumRange);
322 #if !defined(MAGICKCORE_HDRI_SUPPORT)
323  return((Quantum) (value+0.5));
324 #else
325  return((Quantum) value);
326 #endif
327 }
328 
329 static inline unsigned int ScaleQuantumToLong(const Quantum quantum)
330 {
331 #if !defined(MAGICKCORE_HDRI_SUPPORT)
332  return((unsigned int) (16843009UL*quantum));
333 #else
334  if (quantum <= 0.0)
335  return(0UL);
336  if ((16843009.0*quantum) >= 4294967295.0)
337  return(4294967295UL);
338  return((unsigned int) (16843009.0*quantum+0.5));
339 #endif
340 }
341 
342 static inline unsigned int ScaleQuantumToMap(const Quantum quantum)
343 {
344  if (quantum >= (Quantum) MaxMap)
345  return((unsigned int) MaxMap);
346 #if !defined(MAGICKCORE_HDRI_SUPPORT)
347  return((unsigned int) quantum);
348 #else
349  if (quantum < 0.0)
350  return(0UL);
351  return((unsigned int) (quantum+0.5));
352 #endif
353 }
354 
355 static inline unsigned short ScaleQuantumToShort(const Quantum quantum)
356 {
357 #if !defined(MAGICKCORE_HDRI_SUPPORT)
358  return((unsigned short) (257UL*quantum));
359 #else
360  if (quantum <= 0.0)
361  return(0);
362  if ((257.0*quantum) >= 65535.0)
363  return(65535);
364  return((unsigned short) (257.0*quantum+0.5));
365 #endif
366 }
367 
368 static inline Quantum ScaleShortToQuantum(const unsigned short value)
369 {
370 #if !defined(MAGICKCORE_HDRI_SUPPORT)
371  return((Quantum) ((value+128U)/257U));
372 #else
373  return((Quantum) (value/257.0));
374 #endif
375 }
376 #elif (MAGICKCORE_QUANTUM_DEPTH == 16)
377 static inline Quantum ScaleCharToQuantum(const unsigned char value)
378 {
379 #if !defined(MAGICKCORE_HDRI_SUPPORT)
380  return((Quantum) (257U*value));
381 #else
382  return((Quantum) (257.0*value));
383 #endif
384 }
385 
386 static inline Quantum ScaleLongToQuantum(const unsigned int value)
387 {
388 #if !defined(MAGICKCORE_HDRI_SUPPORT)
389  return((Quantum) ((value)/MagickULLConstant(65537)));
390 #else
391  return((Quantum) (value/65537.0));
392 #endif
393 }
394 
395 static inline Quantum ScaleMapToQuantum(const MagickRealType value)
396 {
397  if (value <= 0.0)
398  return((Quantum) 0);
399  if (value >= MaxMap)
400  return(QuantumRange);
401 #if !defined(MAGICKCORE_HDRI_SUPPORT)
402  return((Quantum) (value+0.5));
403 #else
404  return((Quantum) value);
405 #endif
406 }
407 
408 static inline unsigned int ScaleQuantumToLong(const Quantum quantum)
409 {
410 #if !defined(MAGICKCORE_HDRI_SUPPORT)
411  return((unsigned int) (65537UL*quantum));
412 #else
413  if (quantum <= 0.0)
414  return(0UL);
415  if ((65537.0*quantum) >= 4294967295.0)
416  return(4294967295U);
417  return((unsigned int) (65537.0*quantum+0.5));
418 #endif
419 }
420 
421 static inline unsigned int ScaleQuantumToMap(const Quantum quantum)
422 {
423  if (quantum >= (Quantum) MaxMap)
424  return((unsigned int) MaxMap);
425 #if !defined(MAGICKCORE_HDRI_SUPPORT)
426  return((unsigned int) quantum);
427 #else
428  if (quantum < 0.0)
429  return(0UL);
430  return((unsigned int) (quantum+0.5));
431 #endif
432 }
433 
434 static inline unsigned short ScaleQuantumToShort(const Quantum quantum)
435 {
436 #if !defined(MAGICKCORE_HDRI_SUPPORT)
437  return((unsigned short) quantum);
438 #else
439  if (quantum <= 0.0)
440  return(0);
441  if (quantum >= 65535.0)
442  return(65535);
443  return((unsigned short) (quantum+0.5));
444 #endif
445 }
446 
447 static inline Quantum ScaleShortToQuantum(const unsigned short value)
448 {
449  return((Quantum) value);
450 }
451 #elif (MAGICKCORE_QUANTUM_DEPTH == 32)
452 static inline Quantum ScaleCharToQuantum(const unsigned char value)
453 {
454 #if !defined(MAGICKCORE_HDRI_SUPPORT)
455  return((Quantum) (16843009UL*value));
456 #else
457  return((Quantum) (16843009.0*value));
458 #endif
459 }
460 
461 static inline Quantum ScaleLongToQuantum(const unsigned int value)
462 {
463  return((Quantum) value);
464 }
465 
466 static inline Quantum ScaleMapToQuantum(const MagickRealType value)
467 {
468  if (value <= 0.0)
469  return((Quantum) 0);
470  if (value >= (Quantum) MaxMap)
471  return(QuantumRange);
472 #if !defined(MAGICKCORE_HDRI_SUPPORT)
473  return((Quantum) (65537.0*value+0.5));
474 #else
475  return((Quantum) (65537.0*value));
476 #endif
477 }
478 
479 static inline unsigned int ScaleQuantumToLong(const Quantum quantum)
480 {
481 #if !defined(MAGICKCORE_HDRI_SUPPORT)
482  return((unsigned int) quantum);
483 #else
484  if (quantum <= 0.0)
485  return(0);
486  if ((quantum) >= 4294967295.0)
487  return(4294967295);
488  return((unsigned int) (quantum+0.5));
489 #endif
490 }
491 
492 static inline unsigned int ScaleQuantumToMap(const Quantum quantum)
493 {
494  if (quantum < 0.0)
495  return(0UL);
496  if ((quantum/65537) >= (Quantum) MaxMap)
497  return((unsigned int) MaxMap);
498 #if !defined(MAGICKCORE_HDRI_SUPPORT)
499  return((unsigned int) ((quantum+MagickULLConstant(32768))/
500  MagickULLConstant(65537)));
501 #else
502  return((unsigned int) (quantum/65537.0+0.5));
503 #endif
504 }
505 
506 static inline unsigned short ScaleQuantumToShort(const Quantum quantum)
507 {
508 #if !defined(MAGICKCORE_HDRI_SUPPORT)
509  return((unsigned short) ((quantum+MagickULLConstant(32768))/
510  MagickULLConstant(65537)));
511 #else
512  if (quantum <= 0.0)
513  return(0);
514  if ((quantum/65537.0) >= 65535.0)
515  return(65535);
516  return((unsigned short) (quantum/65537.0+0.5));
517 #endif
518 }
519 
520 static inline Quantum ScaleShortToQuantum(const unsigned short value)
521 {
522 #if !defined(MAGICKCORE_HDRI_SUPPORT)
523  return((Quantum) (65537UL*value));
524 #else
525  return((Quantum) (65537.0*value));
526 #endif
527 }
528 #elif (MAGICKCORE_QUANTUM_DEPTH == 64)
529 static inline Quantum ScaleCharToQuantum(const unsigned char value)
530 {
531  return((Quantum) (72340172838076673.0*value));
532 }
533 
534 static inline Quantum ScaleLongToQuantum(const unsigned int value)
535 {
536  return((Quantum) (4294967297.0*value));
537 }
538 
539 static inline Quantum ScaleMapToQuantum(const MagickRealType value)
540 {
541  if (value <= 0.0)
542  return((Quantum) 0);
543  if (value >= MaxMap)
544  return(QuantumRange);
545  return((Quantum) (281479271743489.0*value));
546 }
547 
548 static inline unsigned int ScaleQuantumToLong(const Quantum quantum)
549 {
550  return((unsigned int) (quantum/4294967297.0+0.5));
551 }
552 
553 static inline unsigned int ScaleQuantumToMap(const Quantum quantum)
554 {
555  if (quantum <= 0.0)
556  return(0UL);
557  if ((quantum/281479271743489.0) >= MaxMap)
558  return((unsigned int) MaxMap);
559  return((unsigned int) (quantum/281479271743489.0+0.5));
560 }
561 
562 static inline unsigned short ScaleQuantumToShort(const Quantum quantum)
563 {
564  if (quantum <= 0.0)
565  return(0);
566  if ((quantum/281479271743489.0) >= 65535.0)
567  return(65535);
568  return((unsigned short) (quantum/281479271743489.0+0.5));
569 }
570 
571 static inline Quantum ScaleShortToQuantum(const unsigned short value)
572 {
573  return((Quantum) (281479271743489.0*value));
574 }
575 #endif
576 
577 static inline unsigned short SinglePrecisionToHalf(const float value)
578 {
579  typedef union _SinglePrecision
580  {
581  unsigned int
582  fixed_point;
583 
584  float
585  single_precision;
586  } SinglePrecision;
587 
588  register int
589  exponent;
590 
591  register unsigned int
592  significand,
593  sign_bit;
594 
595  SinglePrecision
596  map;
597 
598  unsigned short
599  half;
600 
601  /*
602  The IEEE 754 standard specifies half precision as having:
603 
604  Sign bit: 1 bit
605  Exponent width: 5 bits
606  Significand precision: 11 (10 explicitly stored)
607  */
608  map.single_precision=value;
609  sign_bit=(map.fixed_point >> 16) & 0x00008000;
610  exponent=(int) ((map.fixed_point >> ExponentShift) & 0x000000ff)-ExponentBias;
611  significand=map.fixed_point & 0x007fffff;
612  if (exponent <= 0)
613  {
614  int
615  shift;
616 
617  if (exponent < -10)
618  return((unsigned short) sign_bit);
619  significand=significand | 0x00800000;
620  shift=(int) (14-exponent);
621  significand=(unsigned int) ((significand+((1 << (shift-1))-1)+
622  ((significand >> shift) & 0x01)) >> shift);
623  return((unsigned short) (sign_bit | significand));
624  }
625  else
626  if (exponent == (0xff-ExponentBias))
627  {
628  if (significand == 0)
629  return((unsigned short) (sign_bit | ExponentMask));
630  else
631  {
632  significand>>=SignificandShift;
633  half=(unsigned short) (sign_bit | significand |
634  (significand == 0) | ExponentMask);
635  return(half);
636  }
637  }
638  significand=significand+((significand >> SignificandShift) & 0x01)+0x00000fff;
639  if ((significand & 0x00800000) != 0)
640  {
641  significand=0;
642  exponent++;
643  }
644  if (exponent > 30)
645  {
646  float
647  alpha;
648 
649  register int
650  i;
651 
652  /*
653  Float overflow.
654  */
655  alpha=1.0e10;
656  for (i=0; i < 10; i++)
657  alpha*=alpha;
658  return((unsigned short) (sign_bit | ExponentMask));
659  }
660  half=(unsigned short) (sign_bit | (exponent << 10) |
661  (significand >> SignificandShift));
662  return(half);
663 }
664 
665 #if defined(__cplusplus) || defined(c_plusplus)
666 }
667 #endif
668 
669 #endif
MagickDoubleType MagickRealType
Definition: magick-type.h:123
QuantumFormatType
Definition: quantum.h:44
QuantumFormatType format
Definition: quantum-private.h:52
static MagickSizeType GetQuantumRange(const size_t depth)
Definition: quantum-private.h:94
MemoryInfo ** pixels
Definition: quantum-private.h:73
#define ExponentMask
QuantumAlphaType alpha_type
Definition: quantum-private.h:67
size_t signature
Definition: quantum-private.h:88
#define MagickULLConstant(c)
Definition: magick-type.h:39
Definition: quantum.h:33
MagickPrivate void ResetQuantumState(QuantumInfo *)
Definition: quantum.c:578
#define SignBitShift
#define SignificandMask
QuantumState state
Definition: quantum-private.h:82
Definition: memory.c:131
EndianType
Definition: quantum.h:30
size_t quantum
Definition: quantum-private.h:48
EndianType endian
Definition: quantum-private.h:79
static const unsigned char * PushShortPixel(const EndianType endian, const unsigned char *pixels, unsigned short *pixel)
Definition: quantum-private.h:262
MagickBooleanType pack
Definition: quantum-private.h:63
static const unsigned char * PushCharPixel(const unsigned char *pixels, unsigned char *pixel)
Definition: quantum-private.h:232
MagickBooleanType
Definition: magick-type.h:189
static double PerceptibleReciprocal(const double x)
Definition: pixel-accessor.h:124
static Quantum ScaleAnyToQuantum(const QuantumAny quantum, const QuantumAny range)
Definition: quantum-private.h:281
static unsigned char * PopLongPixel(const EndianType endian, const unsigned int pixel, unsigned char *pixels)
Definition: quantum-private.h:192
unsigned int pixel
Definition: quantum-private.h:36
size_t MagickSizeType
Definition: magick-type.h:134
static const unsigned char * PushLongPixel(const EndianType endian, const unsigned char *pixels, unsigned int *pixel)
Definition: quantum-private.h:239
SemaphoreInfo * semaphore
Definition: quantum-private.h:85
#define SignificandShift
#define ExponentShift
#define MaxMap
Definition: magick-type.h:78
Definition: quantum-private.h:45
size_t pad
Definition: quantum-private.h:60
static float HalfToSinglePrecision(const unsigned short half)
Definition: quantum-private.h:110
size_t number_threads
Definition: quantum-private.h:70
double scale
Definition: quantum-private.h:55
const unsigned int * mask
Definition: quantum-private.h:42
unsigned short Quantum
Definition: magick-type.h:85
#define ExponentBias
size_t bits
Definition: quantum-private.h:39
size_t extent
Definition: quantum-private.h:76
static unsigned char * PopCharPixel(const unsigned char pixel, unsigned char *pixels)
Definition: quantum-private.h:185
static unsigned char * PopShortPixel(const EndianType endian, const unsigned short pixel, unsigned char *pixels)
Definition: quantum-private.h:214
#define MagickMin(x, y)
Definition: image-private.h:27
double inverse_scale
Definition: quantum-private.h:33
static unsigned short SinglePrecisionToHalf(const float value)
Definition: quantum-private.h:577
#define MagickPrivate
Definition: method-attribute.h:99
struct _QuantumState QuantumState
static QuantumAny ScaleQuantumToAny(const Quantum quantum, const QuantumAny range)
Definition: quantum-private.h:295
Definition: quantum-private.h:30
MagickSizeType QuantumAny
Definition: magick-type.h:148
QuantumAlphaType
Definition: quantum.h:37
Definition: semaphore.c:59
#define QuantumRange
Definition: magick-type.h:86