2 Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization
3 dedicated to making software imaging solutions freely available.
5 You may not use this file except in compliance with the License.
6 obtain a copy of the License at
8 http://www.imagemagick.org/script/license.php
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.
16 MagickCore pixel accessor methods.
18 #ifndef _MAGICKCORE_PIXEL_ACCESSOR_H
19 #define _MAGICKCORE_PIXEL_ACCESSOR_H
21 #if defined(__cplusplus) || defined(c_plusplus)
26 #include <MagickCore/cache-view.h>
27 #include <MagickCore/color.h>
28 #include <MagickCore/image.h>
32 static inline Quantum GetPixelAlpha(const Image *image,const Quantum *pixel)
34 return(pixel[image->channel_map[AlphaPixelChannel].channel]);
37 static inline PixelTrait GetPixelAlphaTraits(const Image *image)
39 return(image->channel_map[AlphaPixelChannel].traits);
42 static inline Quantum GetPixelBlack(const Image *image,const Quantum *pixel)
44 return(pixel[image->channel_map[BlackPixelChannel].channel]);
47 static inline PixelTrait GetPixelBlackTraits(const Image *image)
49 return(image->channel_map[BlackPixelChannel].traits);
52 static inline Quantum GetPixelBlue(const Image *image,const Quantum *pixel)
54 return(pixel[image->channel_map[BluePixelChannel].channel]);
57 static inline PixelTrait GetPixelBlueTraits(const Image *image)
59 return(image->channel_map[BluePixelChannel].traits);
62 static inline Quantum GetPixelCb(const Image *image,const Quantum *pixel)
64 return(pixel[image->channel_map[CbPixelChannel].channel]);
67 static inline PixelTrait GetPixelCbTraits(const Image *image)
69 return(image->channel_map[CbPixelChannel].traits);
72 static inline Quantum GetPixelChannel(const Image *image,
73 const PixelChannel channel,const Quantum *pixel)
75 return(pixel[image->channel_map[channel].channel]);
78 static inline PixelChannel GetPixelChannelMapChannel(const Image *image,
79 const PixelChannel channel)
81 return(image->channel_map[channel].channel);
84 static inline PixelTrait GetPixelChannelMapTraits(const Image *image,
85 const PixelChannel channel)
87 return(image->channel_map[channel].traits);
90 static inline size_t GetPixelChannels(const Image *image)
92 return(image->number_channels);
95 static inline Quantum GetPixelCr(const Image *image,const Quantum *pixel)
97 return(pixel[image->channel_map[CrPixelChannel].channel]);
100 static inline PixelTrait GetPixelCrTraits(const Image *image)
102 return(image->channel_map[CrPixelChannel].traits);
105 static inline Quantum GetPixelCyan(const Image *image,const Quantum *pixel)
107 return(pixel[image->channel_map[CyanPixelChannel].channel]);
110 static inline PixelTrait GetPixelCyanTraits(const Image *image)
112 return(image->channel_map[CyanPixelChannel].traits);
115 static inline Quantum GetPixelGray(const Image *image,const Quantum *pixel)
117 return(pixel[image->channel_map[GrayPixelChannel].channel]);
120 static inline PixelTrait GetPixelGrayTraits(const Image *image)
122 return(image->channel_map[GrayPixelChannel].traits);
125 static inline Quantum GetPixelGreen(const Image *image,const Quantum *pixel)
127 return(pixel[image->channel_map[GreenPixelChannel].channel]);
130 static inline PixelTrait GetPixelGreenTraits(const Image *image)
132 return(image->channel_map[GreenPixelChannel].traits);
135 static inline Quantum GetPixelIndex(const Image *image,const Quantum *pixel)
137 return(pixel[image->channel_map[IndexPixelChannel].channel]);
140 static inline PixelTrait GetPixelIndexTraits(const Image *image)
142 return(image->channel_map[IndexPixelChannel].traits);
145 static inline Quantum GetPixelInfoIntensity(const PixelInfo *pixel_info)
147 #if !defined(MAGICKCORE_HDRI_SUPPORT)
148 return((Quantum) (0.299*pixel_info->red+0.587*pixel_info->green+0.114*
149 pixel_info->blue+0.5));
151 return((Quantum) (0.299*pixel_info->red+0.587*pixel_info->green+0.114*
156 static inline Quantum GetPixelInfoLuminance(const PixelInfo *pixel_info)
161 #if !defined(MAGICKCORE_HDRI_SUPPORT)
162 luminance=(Quantum) (0.21267*pixel_info->red+0.71516*pixel_info->green+
163 0.07217*pixel_info->blue+0.5);
165 luminance=(Quantum) (0.21267*pixel_info->red+0.71516*pixel_info->green+
166 0.07217*pixel_info->blue);
168 return((Quantum) luminance);
171 static inline Quantum GetPixelMagenta(const Image *image,const Quantum *pixel)
173 return(pixel[image->channel_map[MagentaPixelChannel].channel]);
176 static inline PixelTrait GetPixelMagentaTraits(const Image *image)
178 return(image->channel_map[MagentaPixelChannel].traits);
181 static inline size_t GetPixelMetaChannels(const Image *image)
183 return(image->number_meta_channels);
186 static inline size_t GetPixelMetacontentExtent(const Image *image)
188 return(image->metacontent_extent);
191 static inline Quantum GetPixelRed(const Image *image,const Quantum *pixel)
193 return(pixel[image->channel_map[RedPixelChannel].channel]);
196 static inline PixelTrait GetPixelRedTraits(const Image *image)
198 return(image->channel_map[RedPixelChannel].traits);
201 static inline void GetPixelPacket(const Image *image,const Quantum *pixel,
204 packet->red=GetPixelRed(image,pixel);
205 packet->green=GetPixelGreen(image,pixel);
206 packet->blue=GetPixelBlue(image,pixel);
207 packet->alpha=GetPixelAlpha(image,pixel);
210 static inline Quantum GetPixelPacketIntensity(const PixelPacket *pixel)
212 #if !defined(MAGICKCORE_HDRI_SUPPORT)
213 if ((pixel->red == pixel->green) && (pixel->green == pixel->blue))
215 return((Quantum) (0.299*pixel->red+0.587*pixel->green+0.114*pixel->blue+0.5));
222 alpha=pixel->red-pixel->green;
223 beta=pixel->green-pixel->blue;
224 if ((fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
226 return((Quantum) (0.299*pixel->red+0.587*pixel->green+0.114*pixel->blue));
231 static inline PixelTrait GetPixelTraits(const Image *image,
232 const PixelChannel channel)
234 return(image->channel_map[channel].traits);
237 static inline Quantum GetPixelY(const Image *image,const Quantum *pixel)
239 return(pixel[image->channel_map[YPixelChannel].channel]);
242 static inline PixelTrait GetPixelYTraits(const Image *image)
244 return(image->channel_map[YPixelChannel].traits);
247 static inline Quantum GetPixelYellow(const Image *image,const Quantum *pixel)
249 return(pixel[image->channel_map[YellowPixelChannel].channel]);
252 static inline PixelTrait GetPixelYellowTraits(const Image *image)
254 return(image->channel_map[YellowPixelChannel].traits);
257 static inline MagickBooleanType IsPixelEquivalent(const Image *image,
258 const Quantum *p,const PixelPacket *q)
260 if ((GetPixelRed(image,p) == q->red) &&
261 (GetPixelGreen(image,p) == q->green) &&
262 (GetPixelBlue(image,p) == q->blue))
267 static inline MagickBooleanType IsPixelGray(const Image *image,
268 const Quantum *pixel)
270 #if !defined(MAGICKCORE_HDRI_SUPPORT)
271 if ((GetPixelRed(image,pixel) == GetPixelGreen(image,pixel)) &&
272 (GetPixelGreen(image,pixel) == GetPixelBlue(image,pixel)))
280 alpha=GetPixelRed(image,pixel)-(double) GetPixelGreen(image,pixel);
281 beta=GetPixelGreen(image,pixel)-(double) GetPixelBlue(image,pixel);
282 if ((fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
289 static inline MagickBooleanType IsPixelInfoEquivalent(const PixelInfo *p,
292 #if !defined(MAGICKCORE_HDRI_SUPPORT)
293 if ((p->matte != MagickFalse) && (q->matte == MagickFalse) &&
294 (p->alpha != OpaqueAlpha))
296 if ((q->matte != MagickFalse) && (p->matte == MagickFalse) &&
297 (q->alpha != OpaqueAlpha))
299 if ((p->matte != MagickFalse) && (q->matte != MagickFalse))
301 if (p->alpha != q->alpha)
303 if (p->alpha == TransparentAlpha)
306 if (p->red != q->red)
308 if (p->green != q->green)
310 if (p->blue != q->blue)
312 if ((p->colorspace == CMYKColorspace) && (p->black != q->black))
315 if ((p->matte != MagickFalse) && (q->matte == MagickFalse) &&
316 (fabs(p->alpha-OpaqueAlpha) > 0.5))
318 if ((q->matte != MagickFalse) && (p->matte == MagickFalse) &&
319 (fabs(q->alpha-OpaqueAlpha)) > 0.5)
321 if ((p->matte != MagickFalse) && (q->matte != MagickFalse))
323 if (fabs(p->alpha-q->alpha) > 0.5)
325 if (fabs(p->alpha-TransparentAlpha) <= 0.5)
328 if (fabs(p->red-q->red) > 0.5)
330 if (fabs(p->green-q->green) > 0.5)
332 if (fabs(p->blue-q->blue) > 0.5)
334 if ((p->colorspace == CMYKColorspace) && (fabs(p->black-q->black) > 0.5))
340 static inline MagickBooleanType IsPixelMonochrome(const Image *image,
341 const Quantum *pixel)
343 #if !defined(MAGICKCORE_HDRI_SUPPORT)
344 if (((GetPixelRed(image,pixel) == 0) ||
345 (GetPixelRed(image,pixel) == (Quantum) QuantumRange)) &&
346 (GetPixelRed(image,pixel) == GetPixelGreen(image,pixel)) &&
347 (GetPixelGreen(image,pixel) == GetPixelBlue(image,pixel)))
355 alpha=GetPixelRed(image,pixel)-(double) GetPixelGreen(image,pixel);
356 beta=GetPixelGreen(image,pixel)-(double) GetPixelBlue(image,pixel);
357 if (((fabs(GetPixelRed(image,pixel)) <= MagickEpsilon) ||
358 (fabs(GetPixelRed(image,pixel)-QuantumRange) <= MagickEpsilon)) &&
359 (fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
366 static inline MagickBooleanType IsPixelPacketEquivalent(const PixelPacket *p,
367 const PixelPacket *q)
369 if ((p->red == q->red) && (p->green == q->green) && (p->blue == q->blue))
374 static inline MagickBooleanType IsPixelPacketGray(const PixelPacket *pixel)
376 #if !defined(MAGICKCORE_HDRI_SUPPORT)
377 if ((pixel->red == pixel->green) && (pixel->green == pixel->blue))
385 alpha=pixel->red-(double) pixel->green;
386 beta=pixel->green-(double) pixel->blue;
387 if ((fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
394 static inline MagickBooleanType IsPixelPacketMonochrome(
395 const PixelPacket *pixel)
397 #if !defined(MAGICKCORE_HDRI_SUPPORT)
398 if (((pixel->red == 0) || (pixel->red == (Quantum) QuantumRange)) &&
399 (pixel->red == pixel->green) && (pixel->green == pixel->blue))
407 alpha=pixel->red-(double) pixel->green;
408 beta=pixel->green-(double) pixel->blue;
409 if (((fabs(pixel->red) <= MagickEpsilon) ||
410 (fabs(pixel->red-QuantumRange) <= MagickEpsilon)) &&
411 (fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
418 static inline void SetPacketPixelInfo(const Image *image,
419 const PixelInfo *pixel_info,PixelPacket *packet)
421 packet->red=ClampToQuantum(pixel_info->red);
422 packet->green=ClampToQuantum(pixel_info->green);
423 packet->blue=ClampToQuantum(pixel_info->blue);
424 packet->alpha=ClampToQuantum(pixel_info->alpha);
425 if (image->colorspace == CMYKColorspace)
426 packet->black=ClampToQuantum(pixel_info->black);
427 if (image->storage_class == PseudoClass)
428 packet->index=ClampToQuantum(pixel_info->index);
431 static inline void SetPixelAlpha(const Image *image,const Quantum alpha,
434 pixel[image->channel_map[AlphaPixelChannel].channel]=alpha;
437 static inline void SetPixelAlphaTraits(Image *image,const PixelTrait traits)
439 image->channel_map[AlphaPixelChannel].traits=traits;
442 static inline void SetPixelBlack(const Image *image,const Quantum black,
445 pixel[image->channel_map[BlackPixelChannel].channel]=black;
448 static inline void SetPixelBlackTraits(Image *image,const PixelTrait traits)
450 image->channel_map[BlackPixelChannel].traits=traits;
453 static inline void SetPixelBlue(const Image *image,const Quantum blue,
456 pixel[image->channel_map[BluePixelChannel].channel]=blue;
459 static inline void SetPixelBlueTraits(Image *image,const PixelTrait traits)
461 image->channel_map[BluePixelChannel].traits=traits;
464 static inline void SetPixelCb(const Image *image,const Quantum cb,
467 pixel[image->channel_map[CbPixelChannel].channel]=cb;
470 static inline void SetPixelCbTraits(Image *image,const PixelTrait traits)
472 image->channel_map[CbPixelChannel].traits=traits;
475 static inline void SetPixelChannel(const Image *image,
476 const PixelChannel channel,const Quantum quantum,Quantum *pixel)
478 pixel[image->channel_map[channel].channel]=quantum;
481 static inline void SetPixelChannelMapChannel(const Image *image,
482 const PixelChannel channel,const PixelChannel channels)
484 image->channel_map[channel].channel=channels;
487 static inline void SetPixelChannels(Image *image,const size_t number_channels)
489 image->number_channels=number_channels;
492 static inline void SetPixelChannelTraits(Image *image,
493 const PixelChannel channel,const PixelTrait traits)
495 image->channel_map[channel].traits=traits;
498 static inline void SetPixelChannelMapTraits(Image *image,
499 const PixelChannel channel,const PixelTrait traits)
501 image->channel_map[channel].traits=traits;
504 static inline void SetPixelCr(const Image *image,const Quantum cr,
507 pixel[image->channel_map[CrPixelChannel].channel]=cr;
510 static inline void SetPixelCrTraits(Image *image,const PixelTrait traits)
512 image->channel_map[CrPixelChannel].traits=traits;
515 static inline void SetPixelCyan(const Image *image,const Quantum cyan,
518 pixel[image->channel_map[CyanPixelChannel].channel]=cyan;
521 static inline void SetPixelGray(const Image *image,const Quantum gray,
524 pixel[image->channel_map[GrayPixelChannel].channel]=gray;
527 static inline void SetPixelGrayTraits(Image *image,const PixelTrait traits)
529 image->channel_map[GrayPixelChannel].traits=traits;
532 static inline void SetPixelGreen(const Image *image,const Quantum green,
535 pixel[image->channel_map[GreenPixelChannel].channel]=green;
538 static inline void SetPixelGreenTraits(Image *image,const PixelTrait traits)
540 image->channel_map[GreenPixelChannel].traits=traits;
543 static inline void SetPixelIndex(const Image *image,const Quantum index,
546 pixel[image->channel_map[IndexPixelChannel].channel]=index;
549 static inline void SetPixelIndexTraits(Image *image,const PixelTrait traits)
551 image->channel_map[IndexPixelChannel].traits=traits;
554 static inline void SetPixelInfo(const Image *image,const Quantum *pixel,
555 PixelInfo *pixel_info)
557 pixel_info->red=(MagickRealType) GetPixelRed(image,pixel);
558 pixel_info->green=(MagickRealType) GetPixelGreen(image,pixel);
559 pixel_info->blue=(MagickRealType) GetPixelBlue(image,pixel);
560 pixel_info->alpha=(MagickRealType) GetPixelAlpha(image,pixel);
561 if (image->colorspace == CMYKColorspace)
562 pixel_info->black=(MagickRealType) GetPixelBlack(image,pixel);
563 if (image->storage_class == PseudoClass)
564 pixel_info->index=(MagickRealType) GetPixelIndex(image,pixel);
567 static inline void SetPixelInfoBias(const Image *image,PixelInfo *pixel_info)
570 Obsoleted by MorphologyApply().
572 pixel_info->red=image->bias;
573 pixel_info->green=image->bias;
574 pixel_info->blue=image->bias;
575 pixel_info->alpha=image->bias;
576 pixel_info->black=image->bias;
579 static inline void SetPixelInfoPacket(const Image *image,
580 const PixelPacket *pixel,PixelInfo *pixel_info)
582 pixel_info->red=(MagickRealType) pixel->red;
583 pixel_info->green=(MagickRealType) pixel->green;
584 pixel_info->blue=(MagickRealType) pixel->blue;
585 pixel_info->alpha=(MagickRealType) pixel->alpha;
586 if (image->colorspace == CMYKColorspace)
587 pixel_info->black=(MagickRealType) pixel->black;
588 if (image->storage_class == PseudoClass)
589 pixel_info->index=(MagickRealType) pixel->index;
592 static inline void SetPixelMagenta(const Image *image,const Quantum magenta,
595 pixel[image->channel_map[MagentaPixelChannel].channel]=
599 static inline void SetPixelMagentaTraits(Image *image,const PixelTrait traits)
601 image->channel_map[MagentaPixelChannel].traits=traits;
604 static inline void SetPixelMetaChannels(Image *image,
605 const size_t number_meta_channels)
607 image->number_meta_channels=number_meta_channels;
610 static inline void SetPixelMetacontentExtent(Image *image,const size_t extent)
612 image->metacontent_extent=extent;
615 static inline void SetPixelRed(const Image *image,const Quantum red,
618 pixel[image->channel_map[RedPixelChannel].channel]=red;
621 static inline void SetPixelRedTraits(Image *image,const PixelTrait traits)
623 image->channel_map[RedPixelChannel].traits=traits;
626 static inline void SetPixelPacket(const Image *image,const PixelPacket *packet,
629 SetPixelRed(image,packet->red,pixel);
630 SetPixelGreen(image,packet->green,pixel);
631 SetPixelBlue(image,packet->blue,pixel);
632 SetPixelAlpha(image,packet->alpha,pixel);
635 static inline void SetPixelPixelInfo(const Image *image,
636 const PixelInfo *pixel_info,Quantum *packet)
638 SetPixelRed(image,ClampToQuantum(pixel_info->red),packet);
639 SetPixelGreen(image,ClampToQuantum(pixel_info->green),packet);
640 SetPixelBlue(image,ClampToQuantum(pixel_info->blue),packet);
641 SetPixelAlpha(image,ClampToQuantum(pixel_info->alpha),packet);
642 if (image->colorspace == CMYKColorspace)
643 SetPixelBlack(image,ClampToQuantum(pixel_info->black),packet);
646 static inline void SetPixelYellow(const Image *image,const Quantum yellow,
649 pixel[image->channel_map[YellowPixelChannel].channel]=
653 static inline void SetPixelYellowTraits(Image *image,const PixelTrait traits)
655 image->channel_map[YellowPixelChannel].traits=traits;
658 static inline void SetPixelY(const Image *image,const Quantum y,Quantum *pixel)
660 pixel[image->channel_map[YPixelChannel].channel]=y;
663 static inline void SetPixelYTraits(Image *image,const PixelTrait traits)
665 image->channel_map[YPixelChannel].traits=traits;
668 static inline Quantum GetPixelIntensity(const Image *image,const Quantum *pixel)
670 #if !defined(MAGICKCORE_HDRI_SUPPORT)
671 if ((GetPixelRed(image,pixel) == GetPixelGreen(image,pixel)) &&
672 (GetPixelGreen(image,pixel) == GetPixelBlue(image,pixel)))
673 return(GetPixelRed(image,pixel));
674 return((Quantum) (0.299*GetPixelRed(image,pixel)+0.587*
675 GetPixelGreen(image,pixel)+0.114*GetPixelBlue(image,pixel)+0.5));
682 alpha=GetPixelRed(image,pixel)-(double) GetPixelGreen(image,pixel);
683 beta=GetPixelGreen(image,pixel)-(double) GetPixelBlue(image,pixel);
684 if ((fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
685 return(GetPixelRed(image,pixel));
686 return((Quantum) (0.299*GetPixelRed(image,pixel)+0.587*
687 GetPixelGreen(image,pixel)+0.114*GetPixelBlue(image,pixel)));
692 static inline Quantum GetPixelLuminance(const Image *image,const Quantum *pixel)
694 #if !defined(MAGICKCORE_HDRI_SUPPORT)
695 return((Quantum) (0.21267*GetPixelRed(image,pixel)+0.71516*
696 GetPixelGreen(image,pixel)+0.07217*GetPixelBlue(image,pixel)+0.5));
698 return((Quantum) (0.21267*GetPixelRed(image,pixel)+0.71516*
699 GetPixelGreen(image,pixel)+0.07217*GetPixelBlue(image,pixel)));
703 #if defined(__cplusplus) || defined(c_plusplus)