|
/*
Copyright 1999-2006 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 private methods.
*/
#ifndef _MAGICKCORE_IMAGE_PRIVATE_H
#define _MAGICKCORE_IMAGE_PRIVATE_H
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#define MagickPI 3.14159265358979323846264338327950288419716939937510
#define MagickSQ2PI 2.50662827463100024161235523934010416269302368164062
#define QuantumScale ((MagickRealType) 1.0/(MagickRealType) QuantumRange)
#define UndefinedTicksPerSecond 100L
#define UndefinedCompressionQuality 0UL
extern MagickExport const char
*BackgroundColor,
*BorderColor,
*DefaultTileFrame,
*DefaultTileGeometry,
*DefaultTileLabel,
*ForegroundColor,
*MatteColor,
*LoadImageTag,
*LoadImagesTag,
*PSDensityGeometry,
*PSPageGeometry,
*SaveImageTag,
*SaveImagesTag;
extern MagickExport const double
DefaultResolution;
static inline double DegreesToRadians(const double degrees)
{
return(MagickPI*degrees/180.0);
}
static inline MagickBooleanType QuantumTick(const MagickOffsetType offset,
const MagickSizeType span)
{
if ((offset & (offset-1)) == 0)
return(MagickTrue);
if ((offset & 0x7f) == 0)
return(MagickTrue);
if (offset == (MagickOffsetType) (span-1))
return(MagickTrue);
return(MagickFalse);
}
static inline MagickRealType RadiansToDegrees(const MagickRealType radians)
{
return(180.0*radians/MagickPI);
}
static inline unsigned char ScaleColor5to8(const unsigned long color)
{
return((unsigned char) (((color) << 3) | ((color) >> 2)));
}
static inline unsigned char ScaleColor6to8(const unsigned long color)
{
return((unsigned char) (((color) << 2) | ((color) >> 4)));
}
static inline unsigned long ScaleColor8to5(const unsigned char color)
{
return((unsigned long) (((color) & ~0x07) >> 3));
}
static inline unsigned long ScaleColor8to6(const unsigned char color)
{
return((unsigned long) (((color) & ~0x03) >> 2));
}
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
#endif
|
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please
let us know and we'll add colourisation support for it.
This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.
A list of licenses authors might use can be found here