| /* |
| Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization |
| dedicated to making software imaging solutions freely available. |
| |
| You may not use this file except in compliance with the License. |
| obtain a copy of the License at |
| |
| http://www.imagemagick.org/script/license.php |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| MagickCore image colorspace private methods. |
| */ |
| #ifndef _MAGICKCORE_COLORSPACE_PRIVATE_H |
| #define _MAGICKCORE_COLORSPACE_PRIVATE_H |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| extern "C" { |
| #endif |
| |
| #include <magick/pixel.h> |
| |
| static inline void ConvertRGBToCMYK(MagickPixelPacket *pixel) |
| { |
| MagickRealType |
| black, |
| cyan, |
| magenta, |
| yellow; |
| |
| cyan=(MagickRealType) (QuantumRange-pixel->red); |
| magenta=(MagickRealType) (QuantumRange-pixel->green); |
| yellow=(MagickRealType) (QuantumRange-pixel->blue); |
| black=(MagickRealType) QuantumRange; |
| if (cyan < black) |
| black=cyan; |
| if (magenta < black) |
| black=magenta; |
| if (yellow < black) |
| black=yellow; |
| if (black == QuantumRange) |
| { |
| cyan=0.0; |
| magenta=0.0; |
| yellow=0.0; |
| } |
| else |
| { |
| cyan=(MagickRealType) (QuantumRange*(cyan-black)/ |
| (QuantumRange-black)); |
| magenta=(MagickRealType) (QuantumRange*(magenta-black)/ |
| (QuantumRange-black)); |
| yellow=(MagickRealType) (QuantumRange*(yellow-black)/ |
| (QuantumRange-black)); |
| } |
| pixel->colorspace=CMYKColorspace; |
| pixel->red=cyan; |
| pixel->green=magenta; |
| pixel->blue=yellow; |
| pixel->index=black; |
| } |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| } |
| #endif |
| |
| #endif |