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 image color methods.
18 #ifndef _MAGICKCORE_COLOR_PRIVATE_H
19 #define _MAGICKCORE_COLOR_PRIVATE_H
21 #if defined(__cplusplus) || defined(c_plusplus)
25 #include <magick/image.h>
26 #include <magick/color.h>
27 #include <magick/exception-private.h>
29 static inline MagickBooleanType IsColorEqual(const PixelPacket *p,
32 if ((GetRedPixelComponent(p) == GetRedPixelComponent(q)) &&
33 (GetGreenPixelComponent(p) == GetGreenPixelComponent(q)) &&
34 (GetBluePixelComponent(p) == GetBluePixelComponent(q)))
39 static inline MagickBooleanType IsGray(const PixelPacket *pixel)
41 if ((GetRedPixelComponent(pixel) == GetGreenPixelComponent(pixel)) &&
42 (GetGreenPixelComponent(pixel) == GetBluePixelComponent(pixel)))
47 static inline MagickBooleanType IsMagickColorEqual(const MagickPixelPacket *p,
48 const MagickPixelPacket *q)
50 #if !defined(MAGICKCORE_HDRI_SUPPORT)
51 if ((p->matte != MagickFalse) && (q->matte == MagickFalse) &&
52 (GetOpacityPixelComponent(p) != OpaqueOpacity))
54 if ((q->matte != MagickFalse) && (p->matte == MagickFalse) &&
55 (q->opacity != OpaqueOpacity))
57 if ((p->matte != MagickFalse) && (q->matte != MagickFalse))
59 if (GetOpacityPixelComponent(p) != q->opacity)
61 if (GetOpacityPixelComponent(p) == TransparentOpacity)
66 if (p->green != q->green)
68 if (p->blue != q->blue)
70 if ((p->colorspace == CMYKColorspace) && (p->index != q->index))
73 if ((p->matte != MagickFalse) && (q->matte == MagickFalse) &&
74 (fabs(GetOpacityPixelComponent(p)-OpaqueOpacity) > 0.5))
76 if ((q->matte != MagickFalse) && (p->matte == MagickFalse) &&
77 (fabs(q->opacity-OpaqueOpacity)) > 0.5)
79 if ((p->matte != MagickFalse) && (q->matte != MagickFalse))
81 if (fabs(GetOpacityPixelComponent(p)-q->opacity) > 0.5)
83 if (fabs(GetOpacityPixelComponent(p)-TransparentOpacity) <= 0.5)
86 if (fabs(p->red-q->red) > 0.5)
88 if (fabs(p->green-q->green) > 0.5)
90 if (fabs(p->blue-q->blue) > 0.5)
92 if ((p->colorspace == CMYKColorspace) && (fabs(p->index-q->index) > 0.5))
98 static inline MagickBooleanType IsMagickGray(const MagickPixelPacket *pixel)
100 if (pixel->colorspace != RGBColorspace)
102 if ((pixel->red == pixel->green) && (pixel->green == pixel->blue))
107 static inline MagickRealType MagickPixelIntensity(
108 const MagickPixelPacket *pixel)
110 return((MagickRealType) (0.299*pixel->red+0.587*pixel->green+0.114*pixel->blue));
113 static inline Quantum MagickPixelIntensityToQuantum(
114 const MagickPixelPacket *pixel)
116 #if !defined(MAGICKCORE_HDRI_SUPPORT)
117 return((Quantum) (0.299*pixel->red+0.587*pixel->green+0.114*pixel->blue+0.5));
119 return((Quantum) (0.299*pixel->red+0.587*pixel->green+0.114*pixel->blue));
123 static inline MagickRealType MagickPixelLuminance(
124 const MagickPixelPacket *pixel)
129 luminance=0.21267*pixel->red+0.71516*pixel->green+0.07217*pixel->blue;
133 static inline MagickRealType PixelIntensity(const PixelPacket *pixel)
138 if ((GetRedPixelComponent(pixel) == GetGreenPixelComponent(pixel)) &&
139 (GetGreenPixelComponent(pixel) == GetBluePixelComponent(pixel)))
140 return((MagickRealType) pixel->red);
141 intensity=(MagickRealType) (0.299*GetRedPixelComponent(pixel)+0.587*
142 GetGreenPixelComponent(pixel)+0.114*GetBluePixelComponent(pixel));
146 static inline Quantum PixelIntensityToQuantum(const PixelPacket *pixel)
148 #if !defined(MAGICKCORE_HDRI_SUPPORT)
149 if ((GetRedPixelComponent(pixel) == GetGreenPixelComponent(pixel)) &&
150 (GetGreenPixelComponent(pixel) == GetBluePixelComponent(pixel)))
151 return(GetRedPixelComponent(pixel));
152 return((Quantum) (0.299*GetRedPixelComponent(pixel)+0.587*
153 GetGreenPixelComponent(pixel)+0.114*GetBluePixelComponent(pixel)+0.5));
160 alpha=GetRedPixelComponent(pixel)-GetGreenPixelComponent(pixel);
161 beta=GetGreenPixelComponent(pixel)-GetBluePixelComponent(pixel);
162 if ((fabs(alpha) <= MagickEpsilon) && (fabs(beta) <= MagickEpsilon))
163 return(GetRedPixelComponent(pixel));
164 return((Quantum) (0.299*GetRedPixelComponent(pixel)+0.587*
165 GetGreenPixelComponent(pixel)+0.114*GetBluePixelComponent(pixel)));
170 #if defined(__cplusplus) || defined(c_plusplus)