18 #ifndef MAGICKCORE_PIXEL_ACCESSOR_H
19 #define MAGICKCORE_PIXEL_ACCESSOR_H
22 #include "magick/gem.h"
23 #include "magick/pixel.h"
25 #if defined(__cplusplus) || defined(c_plusplus)
29 #define ClampPixelRed(pixel) ClampToQuantum((pixel)->red)
30 #define ClampPixelGreen(pixel) ClampToQuantum((pixel)->green)
31 #define ClampPixelBlue(pixel) ClampToQuantum((pixel)->blue)
32 #define ClampPixelIndex(indexes) ClampToQuantum(*(indexes))
33 #define ClampPixelOpacity(pixel) ClampToQuantum((pixel)->opacity)
34 #define GetPixela(pixel) ((pixel)->green)
35 #define GetPixelb(pixel) ((pixel)->blue)
36 #define GetPixelAlpha(pixel) (QuantumRange-(pixel)->opacity)
37 #define GetPixelBlack(indexes) (*(indexes))
38 #define GetPixelBlue(pixel) ((pixel)->blue)
39 #define GetPixelCb(pixel) ((pixel)->green)
40 #define GetPixelCr(pixel) ((pixel)->blue)
41 #define GetPixelCyan(pixel) ((pixel)->red)
42 #define GetPixelGray(pixel) ((pixel)->red)
43 #define GetPixelGreen(pixel) ((pixel)->green)
44 #define GetPixelIndex(indexes) (*(indexes))
45 #define GetPixelL(pixel) ((pixel)->red)
46 #define GetPixelLabel(pixel) ((ssize_t) (pixel)->red)
47 #define GetPixelMagenta(pixel) ((pixel)->green)
48 #define GetPixelNext(pixel) ((pixel)+1)
49 #define GetPixelOpacity(pixel) ((pixel)->opacity)
50 #define GetPixelRed(pixel) ((pixel)->red)
51 #define GetPixelRGB(pixel,packet) \
53 (packet)->red=GetPixelRed((pixel)); \
54 (packet)->green=GetPixelGreen((pixel)); \
55 (packet)->blue=GetPixelBlue((pixel)); \
57 #define GetPixelRGBO(pixel,packet) \
59 (packet)->red=GetPixelRed((pixel)); \
60 (packet)->green=GetPixelGreen((pixel)); \
61 (packet)->blue=GetPixelBlue((pixel)); \
62 (packet)->opacity=GetPixelOpacity((pixel)); \
64 #define GetPixelY(pixel) ((pixel)->red)
65 #define GetPixelYellow(pixel) ((pixel)->blue)
66 #define SetPixela(pixel,value) ((pixel)->green=(Quantum) (value))
67 #define SetPixelAlpha(pixel,value) \
68 ((pixel)->opacity=(Quantum) (QuantumRange-(value)))
69 #define SetPixelb(pixel,value) ((pixel)->blue=(Quantum) (value))
70 #define SetPixelBlack(indexes,value) (*(indexes)=(Quantum) (value))
71 #define SetPixelBlue(pixel,value) ((pixel)->blue=(Quantum) (value))
72 #define SetPixelCb(pixel,value) ((pixel)->green=(Quantum) (value))
73 #define SetPixelCr(pixel,value) ((pixel)->blue=(Quantum) (value))
74 #define SetPixelCyan(pixel,value) ((pixel)->red=(Quantum) (value))
75 #define SetPixelGray(pixel,value) \
76 ((pixel)->red=(pixel)->green=(pixel)->blue=(Quantum) (value))
77 #define SetPixelGreen(pixel,value) ((pixel)->green=(Quantum) (value))
78 #define SetPixelIndex(indexes,value) (*(indexes)=(IndexPacket) (value))
79 #define SetPixelL(pixel,value) ((pixel)->red=(Quantum) (value))
80 #define SetPixelMagenta(pixel,value) ((pixel)->green=(Quantum) (value))
81 #define SetPixelOpacity(pixel,value) ((pixel)->opacity=(Quantum) (value))
82 #define SetPixelRed(pixel,value) ((pixel)->red=(Quantum) (value))
83 #define SetPixelRgb(pixel,packet) \
85 SetPixelRed(pixel,(packet)->red); \
86 SetPixelGreen(pixel,(packet)->green); \
87 SetPixelBlue(pixel,(packet)->blue); \
89 #define SetPixelRGBA(pixel,packet) \
91 SetPixelRed(pixel,(packet)->red); \
92 SetPixelGreen(pixel,(packet)->green); \
93 SetPixelBlue(pixel,(packet)->blue); \
94 SetPixelAlpha(pixel,(QuantumRange-(packet)->opacity)); \
96 #define SetPixelRGBO(pixel,packet) \
98 SetPixelRed(pixel,(packet)->red); \
99 SetPixelGreen(pixel,(packet)->green); \
100 SetPixelBlue(pixel,(packet)->blue); \
101 SetPixelOpacity(pixel,(packet)->opacity); \
103 #define SetPixelYellow(pixel,value) ((pixel)->blue=(Quantum) (value))
104 #define SetPixelY(pixel,value) ((pixel)->red=(Quantum) (value))
106 static inline MagickRealType AbsolutePixelValue(
const MagickRealType x)
108 return(x < 0.0f ? -x : x);
111 static inline Quantum ClampPixel(
const MagickRealType value)
115 if (value >= (MagickRealType) QuantumRange)
116 return((Quantum) QuantumRange);
117 #if !defined(MAGICKCORE_HDRI_SUPPORT)
118 return((Quantum) (value+0.5f));
120 return((Quantum) value);
124 static inline double PerceptibleReciprocal(
const double x)
132 sign=x < 0.0 ? -1.0 : 1.0;
133 if ((sign*x) >= MagickEpsilon)
135 return(sign/MagickEpsilon);
138 static inline MagickRealType GetPixelLuma(
139 const Image *magick_restrict image,
const PixelPacket *magick_restrict pixel)
145 intensity=(MagickRealType) (0.212656f*pixel->red+0.715158f*pixel->green+
146 0.072186f*pixel->blue);
150 static inline MagickRealType GetPixelLuminance(
151 const Image *magick_restrict image,
const PixelPacket *magick_restrict pixel)
156 if (image->colorspace != sRGBColorspace)
158 intensity=(MagickRealType) (0.212656f*pixel->red+0.715158f*pixel->green+
159 0.072186f*pixel->blue);
162 intensity=(MagickRealType) (0.212656f*DecodePixelGamma((MagickRealType)
163 pixel->red)+0.715158f*DecodePixelGamma((MagickRealType) pixel->green)+
164 0.072186f*DecodePixelGamma((MagickRealType) pixel->blue));
168 static inline MagickBooleanType IsPixelAtDepth(
const Quantum pixel,
169 const QuantumAny range)
176 #if !defined(MAGICKCORE_HDRI_SUPPORT)
177 quantum=(Quantum) (((MagickRealType) QuantumRange*((QuantumAny)
178 (((MagickRealType) range*pixel)/QuantumRange+0.5)))/range+0.5);
180 quantum=(Quantum) (((MagickRealType) QuantumRange*((QuantumAny)
181 (((MagickRealType) range*pixel)/QuantumRange+0.5)))/(MagickRealType) range);
183 return(pixel == quantum ? MagickTrue : MagickFalse);
186 static inline MagickBooleanType IsPixelGray(
const PixelPacket *pixel)
192 red_green=(MagickRealType) pixel->red-pixel->green;
193 green_blue=(MagickRealType) pixel->green-pixel->blue;
194 if (((QuantumScale*AbsolutePixelValue(red_green)) < MagickEpsilon) &&
195 ((QuantumScale*AbsolutePixelValue(green_blue)) < MagickEpsilon))
200 static inline MagickBooleanType IsPixelMonochrome(
208 red=(MagickRealType) pixel->red;
209 if ((AbsolutePixelValue(red) >= MagickEpsilon) &&
210 (AbsolutePixelValue(red-QuantumRange) >= MagickEpsilon))
212 red_green=(MagickRealType) pixel->red-pixel->green;
213 green_blue=(MagickRealType) pixel->green-pixel->blue;
214 if (((QuantumScale*AbsolutePixelValue(red_green)) < MagickEpsilon) &&
215 ((QuantumScale*AbsolutePixelValue(green_blue)) < MagickEpsilon))
220 static inline Quantum PixelPacketIntensity(
const PixelPacket *pixel)
225 if ((pixel->red == pixel->green) && (pixel->green == pixel->blue))
227 intensity=(MagickRealType) (0.212656*pixel->red+0.715158*pixel->green+
228 0.072186*pixel->blue);
229 return(ClampToQuantum(intensity));
232 static inline void SetPixelViaMagickPixel(
const Image *magick_restrict image,
236 pixel->red=ClampToQuantum(magick_pixel->red);
237 pixel->green=ClampToQuantum(magick_pixel->green);
238 pixel->blue=ClampToQuantum(magick_pixel->blue);
239 if (image->matte != MagickFalse)
240 pixel->opacity=ClampToQuantum(magick_pixel->opacity);
243 #if defined(__cplusplus) || defined(c_plusplus)