magick/geometry.h

/*
  Copyright 1999-2011 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 geometry methods.
*/
#ifndef _MAGICKCORE_GEOMETRY_H
#define _MAGICKCORE_GEOMETRY_H

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

typedef enum
{
#undef NoValue
  NoValue = 0x0000,
#undef XValue
  XValue = 0x0001,
  XiValue = 0x0001,
#undef YValue
  YValue = 0x0002,
  PsiValue = 0x0002,
#undef WidthValue
  WidthValue = 0x0004,
  RhoValue = 0x0004,
#undef HeightValue
  HeightValue = 0x0008,
  SigmaValue = 0x0008,
  ChiValue = 0x0010,
  XiNegative = 0x0020,
#undef XNegative
  XNegative = 0x0020,
  PsiNegative = 0x0040,
#undef YNegative
  YNegative = 0x0040,
  ChiNegative = 0x0080,
  PercentValue = 0x1000,   /* '%'  percentage of something */
  AspectValue = 0x2000,    /* '!'  resize no-aspect - special use flag */
  NormalizeValue = 0x2000, /* '!'  ScaleKernelValue() in morphology.c */
  LessValue = 0x4000,      /* '<'  resize smaller - special use flag */
  GreaterValue = 0x8000,   /* '>'  resize larger - spacial use flag */
  MinimumValue = 0x10000,  /* '^'  special handling needed */
  CorrelateNormalizeValue = 0x10000, /* '^' see ScaleKernelValue() */
  AreaValue = 0x20000,     /* '@'  resize to area - special use flag */
  DecimalValue = 0x40000,  /* '.'  floating point numbers found */
#undef AllValues
  AllValues = 0x7fffffff
} GeometryFlags;

#if defined(ForgetGravity)
#undef ForgetGravity
#undef NorthWestGravity
#undef NorthGravity
#undef NorthEastGravity
#undef WestGravity
#undef CenterGravity
#undef EastGravity
#undef SouthWestGravity
#undef SouthGravity
#undef SouthEastGravity
#undef StaticGravity
#endif

typedef enum
{
  UndefinedGravity,
  ForgetGravity = 0,
  NorthWestGravity = 1,
  NorthGravity = 2,
  NorthEastGravity = 3,
  WestGravity = 4, 
  CenterGravity = 5,
  EastGravity = 6,
  SouthWestGravity = 7,
  SouthGravity = 8,
  SouthEastGravity = 9,
  StaticGravity = 10 
} GravityType;

typedef struct _AffineMatrix
{
  double
    sx,
    rx,
    ry,
    sy,
    tx,
    ty;
} AffineMatrix;

typedef struct _GeometryInfo
{
  double
    rho,
    sigma,
    xi,
    psi,
    chi;
} GeometryInfo;

typedef struct _OffsetInfo
{
  ssize_t
    x,
    y;
} OffsetInfo;

typedef struct _RectangleInfo
{
  size_t
    width,
    height;

  ssize_t
    x,
    y;
} RectangleInfo;

extern MagickExport char
  *GetPageGeometry(const char *);

extern MagickExport MagickBooleanType
  IsGeometry(const char *),
  IsSceneGeometry(const char *,const MagickBooleanType);

extern MagickExport MagickStatusType
  GetGeometry(const char *,ssize_t *,ssize_t *,size_t *,size_t *),
  ParseAbsoluteGeometry(const char *,RectangleInfo *),
  ParseAffineGeometry(const char *,AffineMatrix *,ExceptionInfo *),
  ParseGeometry(const char *,GeometryInfo *),
  ParseGravityGeometry(const Image *,const char *,RectangleInfo *,
    ExceptionInfo *),
  ParseMetaGeometry(const char *,ssize_t *,ssize_t *,size_t *,size_t *),
  ParsePageGeometry(const Image *,const char *,RectangleInfo *,ExceptionInfo *),
  ParseRegionGeometry(const Image *,const char *,RectangleInfo *,
    ExceptionInfo *);

extern MagickExport void
  GravityAdjustGeometry(const size_t,const size_t,
    const GravityType,RectangleInfo *),
  SetGeometry(const Image *,RectangleInfo *),
  SetGeometryInfo(GeometryInfo *);

#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

#endif