image-private.h

Go to the documentation of this file.
00001 /*
00002   Copyright 1999-2020 ImageMagick Studio LLC, a non-profit organization
00003   dedicated to making software imaging solutions freely available.
00004 
00005   You may not use this file except in compliance with the License.  You may
00006   obtain a copy of the License at
00007 
00008     https://imagemagick.org/script/license.php
00009 
00010   Unless required by applicable law or agreed to in writing, software
00011   distributed under the License is distributed on an "AS IS" BASIS,
00012   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013   See the License for the specific language governing permissions and
00014   limitations under the License.
00015 
00016   MagickCore image private methods.
00017 */
00018 #ifndef MAGICKCORE_IMAGE_PRIVATE_H
00019 #define MAGICKCORE_IMAGE_PRIVATE_H
00020 
00021 #if defined(__cplusplus) || defined(c_plusplus)
00022 extern "C" {
00023 #endif
00024 
00025 #define MagickAbsoluteValue(x)  ((x) < 0 ? -(x) : (x))
00026 #define MagickMax(x,y)  (((x) > (y)) ? (x) : (y))
00027 #define MagickMin(x,y)  (((x) < (y)) ? (x) : (y))
00028 #define Magick2PI    6.28318530717958647692528676655900576839433879875020
00029 #define MagickPHI    1.61803398874989484820458683436563811772030917980576
00030 #define MagickPI  3.14159265358979323846264338327950288419716939937510
00031 #define MagickPI2    1.57079632679489661923132169163975144209858469968755
00032 #define MagickSQ1_2  0.70710678118654752440084436210484903928483593768847
00033 #define MagickSQ2    1.41421356237309504880168872420969807856967187537695
00034 #define MagickSQ2PI  2.50662827463100024161235523934010416269302368164062
00035 #define UndefinedTicksPerSecond  100L
00036 #define UndefinedCompressionQuality  0UL
00037 
00038 extern MagickExport const char
00039   AlphaColor[],
00040   BackgroundColor[],
00041   BorderColor[],
00042   DefaultTileFrame[],
00043   DefaultTileGeometry[],
00044   DefaultTileLabel[],
00045   ForegroundColor[],
00046   LoadImageTag[],
00047   LoadImagesTag[],
00048   PSDensityGeometry[],
00049   PSPageGeometry[],
00050   SaveImageTag[],
00051   SaveImagesTag[];
00052 
00053 extern MagickExport const double
00054   DefaultResolution;
00055 
00056 static inline double DegreesToRadians(const double degrees)
00057 {
00058   return((double) (MagickPI*degrees/180.0));
00059 }
00060 
00061 static inline double RadiansToDegrees(const double radians)
00062 {
00063   return((double) (180.0*radians/MagickPI));
00064 }
00065 
00066 static inline unsigned char ScaleColor5to8(const unsigned int color)
00067 {
00068   return((unsigned char) (((color) << 3) | ((color) >> 2)));
00069 }
00070 
00071 static inline unsigned char ScaleColor6to8(const unsigned int color)
00072 {
00073   return((unsigned char) (((color) << 2) | ((color) >> 4)));
00074 }
00075 
00076 static inline unsigned int ScaleColor8to5(const unsigned char color)
00077 {
00078   return((unsigned int) (((color) & ~0x07) >> 3));
00079 }
00080 
00081 static inline unsigned int ScaleColor8to6(const unsigned char color)
00082 {
00083   return((unsigned int) (((color) & ~0x03) >> 2));
00084 }
00085 
00086 #if defined(__cplusplus) || defined(c_plusplus)
00087 }
00088 #endif
00089 
00090 #endif

Generated on 3 Feb 2020 for MagickCore by  doxygen 1.6.1