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geometry.c
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% GGGG EEEEE OOO M M EEEEE TTTTT RRRR Y Y %
% G E O O MM MM E T R R Y Y %
% G GG EEE O O M M M EEE T RRRR Y %
% G G E O O M M E T R R Y %
% GGGG EEEEE OOO M M EEEEE T R R Y %
% %
% %
% MagickCore Geometry Methods %
% %
% Software Design %
% Cristy %
% Copyright 1999 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. You may %
% obtain a copy of the License at %
% %
% https://imagemagick.org/license/ %
% %
% 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. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
␌
/*
Include declarations.
*/
#include "MagickCore/studio.h"
#include "MagickCore/constitute.h"
#include "MagickCore/draw.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/geometry.h"
#include "MagickCore/geometry-private.h"
#include "MagickCore/image-private.h"
#include "MagickCore/memory_.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/string_.h"
#include "MagickCore/string-private.h"
#include "MagickCore/token.h"
␌
/*
Define declarations.
*/
#define MagickPagesize(name,geometry) { name, sizeof(name)-1, geometry }
␌
/*
Structure declarations.
*/
typedef struct _PageInfo
{
const char
name[12];
size_t
extent;
const char
geometry[10];
} PageInfo;
static const PageInfo
Pagesizes[] =
{
MagickPagesize("4x6", "288x432"),
MagickPagesize("5x7", "360x504"),
MagickPagesize("7x9", "504x648"),
MagickPagesize("8x10", "576x720"),
MagickPagesize("9x11", "648x792"),
MagickPagesize("9x12", "648x864"),
MagickPagesize("10x13", "720x936"),
MagickPagesize("10x14", "720x1008"),
MagickPagesize("11x17", "792x1224"),
MagickPagesize("4A0", "4768x6741"),
MagickPagesize("2A0", "3370x4768"),
MagickPagesize("a0", "2384x3370"),
MagickPagesize("a10", "74x105"),
MagickPagesize("a1", "1684x2384"),
MagickPagesize("a2", "1191x1684"),
MagickPagesize("a3", "842x1191"),
MagickPagesize("a4small", "595x842"),
MagickPagesize("a4", "595x842"),
MagickPagesize("a5", "420x595"),
MagickPagesize("a6", "298x420"),
MagickPagesize("a7", "210x298"),
MagickPagesize("a8", "147x210"),
MagickPagesize("a9", "105x147"),
MagickPagesize("archa", "648x864"),
MagickPagesize("archb", "864x1296"),
MagickPagesize("archC", "1296x1728"),
MagickPagesize("archd", "1728x2592"),
MagickPagesize("arche", "2592x3456"),
MagickPagesize("b0", "2920x4127"),
MagickPagesize("b10", "91x127"),
MagickPagesize("b1", "2064x2920"),
MagickPagesize("b2", "1460x2064"),
MagickPagesize("b3", "1032x1460"),
MagickPagesize("b4", "729x1032"),
MagickPagesize("b5", "516x729"),
MagickPagesize("b6", "363x516"),
MagickPagesize("b7", "258x363"),
MagickPagesize("b8", "181x258"),
MagickPagesize("b9", "127x181"),
MagickPagesize("c0", "2599x3676"),
MagickPagesize("c1", "1837x2599"),
MagickPagesize("c2", "1298x1837"),
MagickPagesize("c3", "918x1296"),
MagickPagesize("c4", "649x918"),
MagickPagesize("c5", "459x649"),
MagickPagesize("c6", "323x459"),
MagickPagesize("c7", "230x323"),
MagickPagesize("csheet", "1224x1584"),
MagickPagesize("dsheet", "1584x2448"),
MagickPagesize("esheet", "2448x3168"),
MagickPagesize("executive", "540x720"),
MagickPagesize("flsa", "612x936"),
MagickPagesize("flse", "612x936"),
MagickPagesize("folio", "612x936"),
MagickPagesize("halfletter", "396x612"),
MagickPagesize("isob0", "2835x4008"),
MagickPagesize("isob10", "88x125"),
MagickPagesize("isob1", "2004x2835"),
MagickPagesize("isob2", "1417x2004"),
MagickPagesize("isob3", "1001x1417"),
MagickPagesize("isob4", "709x1001"),
MagickPagesize("isob5", "499x709"),
MagickPagesize("isob6", "354x499"),
MagickPagesize("isob7", "249x354"),
MagickPagesize("isob8", "176x249"),
MagickPagesize("isob9", "125x176"),
MagickPagesize("jisb0", "1030x1456"),
MagickPagesize("jisb1", "728x1030"),
MagickPagesize("jisb2", "515x728"),
MagickPagesize("jisb3", "364x515"),
MagickPagesize("jisb4", "257x364"),
MagickPagesize("jisb5", "182x257"),
MagickPagesize("jisb6", "128x182"),
MagickPagesize("ledger", "1224x792"),
MagickPagesize("legal", "612x1008"),
MagickPagesize("lettersmall", "612x792"),
MagickPagesize("letter", "612x792"),
MagickPagesize("monarch", "279x540"),
MagickPagesize("quarto", "610x780"),
MagickPagesize("statement", "396x612"),
MagickPagesize("tabloid", "792x1224"),
MagickPagesize("", "")
};
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetGeometry() parses a geometry specification and returns the width,
% height, x, and y values. It also returns flags that indicates which
% of the four values (width, height, x, y) were located in the string, and
% whether the x or y values are negative. In addition, there are flags to
% report any meta characters (%, !, <, or >).
%
% The value must form a proper geometry style specification of WxH+X+Y
% of integers only, and values can not be separated by comma, colon, or
% slash characters. See ParseGeometry() below.
%
% Offsets may be prefixed by multiple signs to make offset string
% substitutions easier to handle from shell scripts.
% For example: "-10-10", "-+10-+10", or "+-10+-10" will generate negative
% offsets, while "+10+10", "++10++10", or "--10--10" will generate positive
% offsets.
%
% The format of the GetGeometry method is:
%
% MagickStatusType GetGeometry(const char *geometry,ssize_t *x,ssize_t *y,
% size_t *width,size_t *height)
%
% A description of each parameter follows:
%
% o geometry: The geometry.
%
% o x,y: The x and y offset as determined by the geometry specification.
%
% o width,height: The width and height as determined by the geometry
% specification.
%
*/
MagickExport MagickStatusType GetGeometry(const char *geometry,ssize_t *x,
ssize_t *y,size_t *width,size_t *height)
{
char
*p,
pedantic_geometry[MagickPathExtent],
*q;
double
value;
int
c;
MagickStatusType
flags;
/*
Remove whitespace and meta characters from geometry specification.
*/
flags=NoValue;
if ((geometry == (char *) NULL) || (*geometry == '\0'))
return(flags);
if (strlen(geometry) >= (MagickPathExtent-1))
return(flags);
(void) CopyMagickString(pedantic_geometry,geometry,MagickPathExtent);
for (p=pedantic_geometry; *p != '\0'; )
{
if (isspace((int) ((unsigned char) *p)) != 0)
{
(void) CopyMagickString(p,p+1,MagickPathExtent);
continue;
}
c=(int) *p;
switch (c)
{
case '%':
{
flags|=PercentValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '!':
{
flags|=AspectValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '<':
{
flags|=LessValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '>':
{
flags|=GreaterValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '#':
{
flags|=MaximumValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '^':
{
flags|=MinimumValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '@':
{
flags|=AreaValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '(':
case ')':
{
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case 'x':
case 'X':
{
flags|=SeparatorValue;
p++;
break;
}
case '-':
case ',':
case '+':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case 215:
case 'e':
case 'E':
{
p++;
break;
}
case '.':
{
p++;
flags|=DecimalValue;
break;
}
case ':':
{
p++;
flags|=AspectRatioValue;
break;
}
default:
return(flags);
}
}
/*
Parse width, height, x, and y.
*/
p=pedantic_geometry;
if (*p == '\0')
return(flags);
q=p;
value=StringToDouble(p,&q);
(void) value;
if (LocaleNCompare(p,"0x",2) == 0)
value=(double) strtol(p,&q,10);
if ((*p != '+') && (*p != '-'))
{
c=(int) ((unsigned char) *q);
if ((c == 215) || (*q == 'x') || (*q == 'X') || (*q == ':') ||
(*q == '\0'))
{
/*
Parse width.
*/
q=p;
if (width != (size_t *) NULL)
{
if (LocaleNCompare(p,"0x",2) == 0)
*width=(size_t) strtol(p,&p,10);
else
*width=CastDoubleToSizeT(StringToDouble(p,&p)+0.5);
}
if (p != q)
flags|=WidthValue;
}
}
if ((*p != '+') && (*p != '-'))
{
c=(int) ((unsigned char) *p);
if ((c == 215) || (*p == 'x') || (*p == 'X') || (*p == ':'))
{
p++;
if ((*p != '+') && (*p != '-'))
{
/*
Parse height.
*/
q=p;
if (height != (size_t *) NULL)
*height=CastDoubleToSizeT(StringToDouble(p,&p)+0.5);
if (p != q)
flags|=HeightValue;
}
}
}
if ((*p == '+') || (*p == '-'))
{
/*
Parse x value.
*/
while ((*p == '+') || (*p == '-'))
{
if (*p == '-')
flags^=XNegative; /* negate sign */
p++;
}
q=p;
if (x != (ssize_t *) NULL)
*x=CastDoubleToSsizeT(StringToDouble(p,&p));
if (p != q)
{
flags|=XValue;
if (((flags & XNegative) != 0) && (x != (ssize_t *) NULL))
*x=CastDoubleToSsizeT(-1.0**x);
}
}
if ((*p == '+') || (*p == '-'))
{
/*
Parse y value.
*/
while ((*p == '+') || (*p == '-'))
{
if (*p == '-')
flags^=YNegative; /* negate sign */
p++;
}
q=p;
if (y != (ssize_t *) NULL)
*y=CastDoubleToSsizeT(StringToDouble(p,&p));
if (p != q)
{
flags|=YValue;
if (((flags & YNegative) != 0) && (y != (ssize_t *) NULL))
*y=CastDoubleToSsizeT(-1.0**y);
}
}
if ((flags & PercentValue) != 0)
{
if (((flags & SeparatorValue) == 0) && ((flags & HeightValue) == 0))
{
if ((height != (size_t *) NULL) && (width != (size_t *) NULL))
*height=(*width);
flags|=HeightValue;
}
if (((flags & SeparatorValue) != 0) && ((flags & WidthValue) == 0) &&
(height != (size_t *) NULL) && (width != (size_t *) NULL))
*width=(*height);
}
#if 0
/* Debugging Geometry */
(void) fprintf(stderr,"GetGeometry...\n");
(void) fprintf(stderr,"Input: %s\n",geometry);
(void) fprintf(stderr,"Flags: %c %c %s %s\n",
(flags & WidthValue) ? 'W' : ' ',(flags & HeightValue) ? 'H' : ' ',
(flags & XValue) ? ((flags & XNegative) ? "-X" : "+X") : " ",
(flags & YValue) ? ((flags & YNegative) ? "-Y" : "+Y") : " ");
(void) fprintf(stderr,"Geometry: %ldx%ld%+ld%+ld\n",(long) *width,(long)
*height,(long) *x,(long) *y);
#endif
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t P a g e G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetPageGeometry() replaces any page mnemonic with the equivalent size in
% picas.
%
% The format of the GetPageGeometry method is:
%
% char *GetPageGeometry(const char *page_geometry)
%
% A description of each parameter follows.
%
% o page_geometry: Specifies a pointer to an array of characters. The
% string is either a Postscript page name (e.g. A4) or a postscript page
% geometry (e.g. 612x792+36+36).
%
*/
MagickExport char *GetPageGeometry(const char *page_geometry)
{
char
page[MagickPathExtent];
ssize_t
i;
assert(page_geometry != (char *) NULL);
if (IsEventLogging() != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",page_geometry);
(void) CopyMagickString(page,page_geometry,MagickPathExtent);
for (i=0; *Pagesizes[i].name != '\0'; i++)
{
int
status;
if (Pagesizes[i].extent == 0)
break; /* sentinel */
status=LocaleNCompare(Pagesizes[i].name,page_geometry,Pagesizes[i].extent);
if (status == 0)
{
MagickStatusType
flags;
RectangleInfo
geometry;
/*
Replace mnemonic with the equivalent size in dots-per-inch.
*/
(void) FormatLocaleString(page,MagickPathExtent,"%s%.80s",
Pagesizes[i].geometry,page_geometry+Pagesizes[i].extent);
flags=GetGeometry(page,&geometry.x,&geometry.y,&geometry.width,
&geometry.height);
if ((flags & GreaterValue) == 0)
(void) ConcatenateMagickString(page,">",MagickPathExtent);
break;
}
}
return(AcquireString(page));
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G r a v i t y A d j u s t G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GravityAdjustGeometry() adjusts the offset of a region with regard to the
% given: width, height and gravity; against which it is positioned.
%
% The region should also have an appropriate width and height to correctly
% set the right offset of the top left corner of the region.
%
% The format of the GravityAdjustGeometry method is:
%
% void GravityAdjustGeometry(const size_t width, const size_t height,
% const GravityType gravity,RectangleInfo *region);
%
% A description of each parameter follows:
%
% o width, height: the larger area the region is relative to
%
% o gravity: the edge/corner the current offset is relative to
%
% o region: The region requiring a offset adjustment relative to gravity
%
*/
MagickExport void GravityAdjustGeometry(const size_t width,
const size_t height,const GravityType gravity,RectangleInfo *region)
{
if (region->height == 0)
region->height=height;
if (region->width == 0)
region->width=width;
switch (gravity)
{
case NorthEastGravity:
case EastGravity:
case SouthEastGravity:
{
region->x=CastDoubleToSsizeT((double) width-region->width-region->x);
break;
}
case NorthGravity:
case SouthGravity:
case CenterGravity:
{
region->x=CastDoubleToSsizeT((double) width/2.0-region->width/2.0+
region->x);
break;
}
case ForgetGravity:
case NorthWestGravity:
case WestGravity:
case SouthWestGravity:
default:
break;
}
switch (gravity)
{
case SouthWestGravity:
case SouthGravity:
case SouthEastGravity:
{
region->y=CastDoubleToSsizeT((double) height-region->height-region->y);
break;
}
case EastGravity:
case WestGravity:
case CenterGravity:
{
region->y=CastDoubleToSsizeT((double) height/2.0-region->height/2.0+
region->y);
break;
}
case ForgetGravity:
case NorthWestGravity:
case NorthGravity:
case NorthEastGravity:
default:
break;
}
return;
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ I s G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsGeometry() returns MagickTrue if the geometry specification is valid.
% Examples are 100, 100x200, x200, 100x200+10+20, +10+20, 200%, 200x200!, etc.
%
% The format of the IsGeometry method is:
%
% MagickBooleanType IsGeometry(const char *geometry)
%
% A description of each parameter follows:
%
% o geometry: This string is the geometry specification.
%
*/
MagickExport MagickBooleanType IsGeometry(const char *geometry)
{
GeometryInfo
geometry_info;
MagickStatusType
flags;
if (geometry == (const char *) NULL)
return(MagickFalse);
flags=ParseGeometry(geometry,&geometry_info);
return(flags != NoValue ? MagickTrue : MagickFalse);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ I s S c e n e G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsSceneGeometry() returns MagickTrue if the geometry is a valid scene
% specification (e.g. [1], [1-9], [1,7,4]).
%
% The format of the IsSceneGeometry method is:
%
% MagickBooleanType IsSceneGeometry(const char *geometry,
% const MagickBooleanType pedantic)
%
% A description of each parameter follows:
%
% o geometry: This string is the geometry specification.
%
% o pedantic: A value other than 0 invokes a more restrictive set of
% conditions for a valid specification (e.g. [1], [1-4], [4-1]).
%
*/
MagickExport MagickBooleanType IsSceneGeometry(const char *geometry,
const MagickBooleanType pedantic)
{
char
*p;
double
value;
if (geometry == (const char *) NULL)
return(MagickFalse);
p=(char *) geometry;
value=StringToDouble(geometry,&p);
if (IsNaN(value) != 0)
return(MagickFalse);
if (value > (double) MAGICK_SSIZE_MAX)
return(MagickFalse);
if (value < (double) MAGICK_SSIZE_MIN)
return(MagickFalse);
if (p == geometry)
return(MagickFalse);
if (strspn(geometry,"0123456789-, ") != strlen(geometry))
return(MagickFalse);
if ((pedantic != MagickFalse) && (strchr(geometry,',') != (char *) NULL))
return(MagickFalse);
return(MagickTrue);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ L i s t P a g e s i z e s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ListPagesizes() lists the pagesizes and their associated geometry.
%
% The format of the ListPagesizes method is:
%
% MagickBooleanType ListPagesizes(FILE *file,ExceptionInfo *exception)
%
% A description of each parameter follows.
%
% o file: An pointer to the output FILE.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType ListPagesizes(FILE *file,
ExceptionInfo *magick_unused(exception))
{
#define MaxMagickSpaces ((int) sizeof(Pagesizes[0].name))
const char
*spacer = " ";
ssize_t
i;
magick_unreferenced(exception);
if (file == (FILE *) NULL)
file=stdout;
(void) FormatLocaleFile(file,"\nPagesize Geometry \n");
(void) FormatLocaleFile(file,"---------------------\n");
for (i=0; *Pagesizes[i].name != '\0'; i++)
(void) FormatLocaleFile(file,"%s%.*s%s\n",Pagesizes[i].name,
MaxMagickSpaces-(int) Pagesizes[i].extent,spacer,Pagesizes[i].geometry);
return(MagickTrue);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P a r s e A b s o l u t e G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ParseAbsoluteGeometry() returns a region as defined by the geometry string,
% without any modification by percentages or gravity.
%
% It currently just a wrapper around GetGeometry(), but may be expanded in
% the future to handle other positioning information.
%
% The format of the ParseAbsoluteGeometry method is:
%
% MagickStatusType ParseAbsoluteGeometry(const char *geometry,
% RectangleInfo *region_info)
%
% A description of each parameter follows:
%
% o geometry: The geometry string (e.g. "100x100+10+10").
%
% o region_info: the region as defined by the geometry string.
%
*/
MagickExport MagickStatusType ParseAbsoluteGeometry(const char *geometry,
RectangleInfo *region_info)
{
MagickStatusType
flags;
flags=GetGeometry(geometry,&region_info->x,&region_info->y,
&region_info->width,&region_info->height);
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P a r s e A f f i n e G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ParseAffineGeometry() returns an affine matrix as defined by a string of 4
% to 6 comma/space separated floating point values.
%
% The affine matrix determinant is checked for validity of the values.
%
% The format of the ParseAffineGeometry method is:
%
% MagickStatusType ParseAffineGeometry(const char *geometry,
% AffineMatrix *affine_matrix,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o geometry: The geometry string (e.g. "1.0,0.0,0.0,1.0,3.2,1.2").
%
% o affine_matrix: the affine matrix as defined by the geometry string.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickStatusType ParseAffineGeometry(const char *geometry,
AffineMatrix *affine_matrix,ExceptionInfo *exception)
{
char
token[MagickPathExtent];
const char
*p;
double
determinant;
MagickStatusType
flags;
ssize_t
i;
GetAffineMatrix(affine_matrix);
flags=NoValue;
p=(char *) geometry;
for (i=0; (*p != '\0') && (i < 6); i++)
{
(void) GetNextToken(p,&p,MagickPathExtent,token);
if (*token == ',')
(void) GetNextToken(p,&p,MagickPathExtent,token);
switch (i)
{
case 0:
{
affine_matrix->sx=StringToDouble(token,(char **) NULL);
break;
}
case 1:
{
affine_matrix->rx=StringToDouble(token,(char **) NULL);
break;
}
case 2:
{
affine_matrix->ry=StringToDouble(token,(char **) NULL);
break;
}
case 3:
{
affine_matrix->sy=StringToDouble(token,(char **) NULL);
break;
}
case 4:
{
affine_matrix->tx=StringToDouble(token,(char **) NULL);
flags|=XValue;
break;
}
case 5:
{
affine_matrix->ty=StringToDouble(token,(char **) NULL);
flags|=YValue;
break;
}
}
}
determinant=(affine_matrix->sx*affine_matrix->sy-affine_matrix->rx*
affine_matrix->ry);
if (fabs(determinant) < MagickEpsilon)
(void) ThrowMagickException(exception,GetMagickModule(),OptionError,
"InvalidArgument","'%s' : 'Indeterminate Matrix'",geometry);
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P a r s e G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ParseGeometry() parses a geometry specification and returns the sigma,
% rho, xi, and psi values. It also returns flags that indicates which
% of the four values (sigma, rho, xi, psi) were located in the string, and
% whether the xi or pi values are negative.
%
% In addition, it reports if there are any of meta characters (%, !, <, >, @,
% and ^) flags present. It does not report the location of the percentage
% relative to the values.
%
% Values may also be separated by commas, colons, or slashes, and offsets.
% Chroma subsampling definitions have to be in the form of a:b:c. Offsets may
% be prefixed by multiple signs to make offset string substitutions easier to
% handle from shell scripts. For example: "-10-10", "-+10-+10", or "+-10+-10"
% will generate negative offsets, while "+10+10", "++10++10", or "--10--10"
% will generate positive offsets.
%
% The format of the ParseGeometry method is:
%
% MagickStatusType ParseGeometry(const char *geometry,
% GeometryInfo *geometry_info)
%
% A description of each parameter follows:
%
% o geometry: The geometry string (e.g. "100x100+10+10").
%
% o geometry_info: returns the parsed width/height/x/y in this structure.
%
*/
MagickExport MagickStatusType ParseGeometry(const char *geometry,
GeometryInfo *geometry_info)
{
char
*p,
pedantic_geometry[MagickPathExtent],
*q;
double
value;
GeometryInfo
coordinate;
int
c;
MagickStatusType
flags;
/*
Remove whitespaces meta characters from geometry specification.
*/
assert(geometry_info != (GeometryInfo *) NULL);
(void) memset(geometry_info,0,sizeof(*geometry_info));
flags=NoValue;
if ((geometry == (char *) NULL) || (*geometry == '\0'))
return(flags);
if (strlen(geometry) >= (MagickPathExtent-1))
return(flags);
c=MagickSscanf(geometry,"%lf%*[ ,]%lf%*[ ,]%lf%*[ ,]%lf",&coordinate.rho,
&coordinate.sigma,&coordinate.xi,&coordinate.psi);
if (c == 4)
{
/*
Special case: coordinate (e.g. 0,0 255,255).
*/
geometry_info->rho=coordinate.rho;
geometry_info->sigma=coordinate.sigma;
geometry_info->xi=coordinate.xi;
geometry_info->psi=coordinate.psi;
flags|=RhoValue | SigmaValue | XiValue | PsiValue;
return(flags);
}
(void) CopyMagickString(pedantic_geometry,geometry,MagickPathExtent);
for (p=pedantic_geometry; *p != '\0'; )
{
c=(int) ((unsigned char) *p);
if (isspace((int) ((unsigned char) c)) != 0)
{
(void) CopyMagickString(p,p+1,MagickPathExtent);
continue;
}
switch (c)
{
case '%':
{
flags|=PercentValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '!':
{
flags|=AspectValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '<':
{
flags|=LessValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '>':
{
flags|=GreaterValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '#':
{
flags|=MaximumValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '^':
{
flags|=MinimumValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '@':
{
flags|=AreaValue;
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case '(':
{
if (*(p+1) == ')')
return(flags);
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case ')':
{
(void) CopyMagickString(p,p+1,MagickPathExtent);
break;
}
case 'x':
case 'X':
{
flags|=SeparatorValue;
p++;
break;
}
case '-':
case '+':
case ',':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '/':
case 215:
case 'e':
case 'E':
{
p++;
break;
}
case '.':
{
p++;
flags|=DecimalValue;
break;
}
case ':':
{
p++;
flags|=AspectRatioValue;
break;
}
default:
return(NoValue);
}
}
/*
Parse rho, sigma, xi, psi, and optionally chi.
*/
p=pedantic_geometry;
if (*p == '\0')
return(flags);
q=p;
value=StringToDouble(p,&q);
if (LocaleNCompare(p,"0x",2) == 0)
(void) strtol(p,&q,10);
c=(int) ((unsigned char) *q);
if ((c == 215) || (*q == 'x') || (*q == 'X') || (*q == ':') ||
(*q == ',') || (*q == '/') || (*q =='\0'))
{
/*
Parse rho.
*/
q=p;
if (LocaleNCompare(p,"0x",2) == 0)
value=(double) strtol(p,&p,10);
else
value=StringToDouble(p,&p);
if (p != q)
{
flags|=RhoValue;
geometry_info->rho=value;
}
}
q=p;
c=(int) ((unsigned char) *p);
if ((c == 215) || (*p == 'x') || (*p == 'X') || (*p == ':') || (*p == ',') ||
(*p == '/'))
{
/*
Parse sigma.
*/
p++;
while (isspace((int) ((unsigned char) *p)) != 0)
p++;
c=(int) ((unsigned char) *q);
if (((c != 215) && (*q != 'x') && (*q != 'X') && (*q != ':')) ||
((*p != '+') && (*p != '-')))
{
q=p;
value=StringToDouble(p,&p);
if (p != q)
{
flags|=SigmaValue;
geometry_info->sigma=value;
}
}
}
while (isspace((int) ((unsigned char) *p)) != 0)
p++;
if ((*p == '+') || (*p == '-') || (*p == ',') || (*p == '/') || (*p == ':'))
{
/*
Parse xi value.
*/
if ((*p == ',') || (*p == '/') || (*p == ':') )
p++;
while ((*p == '+') || (*p == '-'))
{
if (*p == '-')
flags^=XiNegative; /* negate sign */
p++;
}
q=p;
value=StringToDouble(p,&p);
if (p != q)
{
flags|=XiValue;
if ((flags & XiNegative) != 0)
value=(-value);
geometry_info->xi=value;
}
while (isspace((int) ((unsigned char) *p)) != 0)
p++;
if ((*p == '+') || (*p == '-') || (*p == ',') || (*p == '/') ||
(*p == ':'))
{
/*
Parse psi value.
*/
if ((*p == ',') || (*p == '/') || (*p == ':'))
p++;
while ((*p == '+') || (*p == '-'))
{
if (*p == '-')
flags^=PsiNegative; /* negate sign */
p++;
}
q=p;
value=StringToDouble(p,&p);
if (p != q)
{
flags|=PsiValue;
if ((flags & PsiNegative) != 0)
value=(-value);
geometry_info->psi=value;
}
}
while (isspace((int) ((unsigned char) *p)) != 0)
p++;
if ((*p == '+') || (*p == '-') || (*p == ',') || (*p == '/') ||
(*p == ':'))
{
/*
Parse chi value.
*/
if ((*p == ',') || (*p == '/') || (*p == ':'))
p++;
while ((*p == '+') || (*p == '-'))
{
if (*p == '-')
flags^=ChiNegative; /* negate sign */
p++;
}
q=p;
value=StringToDouble(p,&p);
if (p != q)
{
flags|=ChiValue;
if ((flags & ChiNegative) != 0)
value=(-value);
geometry_info->chi=value;
}
}
}
if (strchr(pedantic_geometry,':') != (char *) NULL)
{
/*
Normalize sampling factor (e.g. 4:2:2 => 2x1).
*/
if ((flags & SigmaValue) != 0)
geometry_info->rho*=MagickSafeReciprocal(geometry_info->sigma);
geometry_info->sigma=1.0;
if (((flags & XiValue) != 0) && (geometry_info->xi == 0.0))
geometry_info->sigma=2.0;
}
if (((flags & RhoValue) != 0) && ((flags & SigmaValue) == 0) &&
((flags & XiValue) != 0) && ((flags & XiNegative) != 0))
{
if ((flags & PsiValue) == 0)
{
/*
Support negative height values (e.g. 30x-20).
*/
geometry_info->sigma=geometry_info->xi;
geometry_info->xi=0.0;
flags|=SigmaValue;
flags&=(unsigned int) (~XiValue);
}
else
if ((flags & ChiValue) == 0)
{
/*
Support negative height values (e.g. 30x-20+10).
*/
geometry_info->sigma=geometry_info->xi;
geometry_info->xi=geometry_info->psi;
flags|=SigmaValue;
flags|=XiValue;
flags&=(unsigned int) (~PsiValue);
}
else
{
/*
Support negative height values (e.g. 30x-20+10+10).
*/
geometry_info->sigma=geometry_info->xi;
geometry_info->xi=geometry_info->psi;
geometry_info->psi=geometry_info->chi;
flags|=SigmaValue;
flags|=XiValue;
flags|=PsiValue;
flags&=(unsigned int) (~ChiValue);
}
}
if ((flags & PercentValue) != 0)
{
if (((flags & SeparatorValue) == 0) && ((flags & SigmaValue) == 0))
geometry_info->sigma=geometry_info->rho;
if (((flags & SeparatorValue) != 0) && ((flags & RhoValue) == 0))
geometry_info->rho=geometry_info->sigma;
}
#if 0
/* Debugging Geometry */
(void) fprintf(stderr,"ParseGeometry...\n");
(void) fprintf(stderr,"Flags: %c %c %s %s %s\n",
(flags & RhoValue) ? 'W' : ' ',(flags & SigmaValue) ? 'H' : ' ',
(flags & XiValue) ? ((flags & XiNegative) ? "-X" : "+X") : " ",
(flags & PsiValue) ? ((flags & PsiNegative) ? "-Y" : "+Y") : " ",
(flags & ChiValue) ? ((flags & ChiNegative) ? "-Z" : "+Z") : " ");
(void) fprintf(stderr,"Geometry: %lg,%lg,%lg,%lg,%lg\n",geometry_info->rho,
geometry_info->sigma,geometry_info->xi,geometry_info->psi,
geometry_info->chi);
#endif
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P a r s e G r a v i t y G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ParseGravityGeometry() returns a region as defined by the geometry string
% with respect to the given image page (canvas) dimensions and the images
% gravity setting.
%
% This is typically used for specifying a area within a given image for
% cropping images to a smaller size, chopping out rows and or columns, or
% resizing and positioning overlay images.
%
% Percentages are relative to image size and not page size, and are set to
% nearest integer (pixel) size.
%
% The format of the ParseGravityGeometry method is:
%
% MagickStatusType ParseGravityGeometry(Image *image,const char *geometry,
% RectangleInfo *region_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o geometry: The geometry string (e.g. "100x100+10+10").
%
% o region_info: the region as defined by the geometry string with respect
% to the image dimensions and its gravity.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickStatusType ParseGravityGeometry(const Image *image,
const char *geometry,RectangleInfo *region_info,ExceptionInfo *exception)
{
MagickStatusType
flags;
size_t
height,
width;
if (IsEventLogging() != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",geometry);
if ((geometry == (char *) NULL) || (*geometry == '\0'))
return(NoValue);
SetGeometry(image,region_info);
if (image->page.width != 0)
region_info->width=image->page.width;
if (image->page.height != 0)
region_info->height=image->page.height;
flags=ParseAbsoluteGeometry(geometry,region_info);
if (flags == NoValue)
{
(void) ThrowMagickException(exception,GetMagickModule(),OptionError,
"InvalidGeometry","`%s'",geometry);
return(flags);
}
if ((flags & PercentValue) != 0)
{
GeometryInfo
geometry_info;
MagickStatusType
status;
PointInfo
scale;
/*
Geometry is a percentage of the image size, not canvas size
*/
if (image->gravity != UndefinedGravity)
flags|=XValue | YValue;
status=ParseGeometry(geometry,&geometry_info);
scale.x=geometry_info.rho;
if ((status & RhoValue) == 0)
scale.x=100.0;
scale.y=geometry_info.sigma;
if ((status & SigmaValue) == 0)
scale.y=scale.x;
region_info->width=CastDoubleToSizeT(scale.x*image->columns/100.0+0.5);
region_info->height=CastDoubleToSizeT(scale.y*image->rows/100.0+0.5);
}
if ((flags & AspectRatioValue) != 0)
{
double
geometry_ratio,
image_ratio;
GeometryInfo
geometry_info;
/*
Geometry is a relative to image size and aspect ratio.
*/
if (image->gravity != UndefinedGravity)
flags|=XValue | YValue;
(void) ParseGeometry(geometry,&geometry_info);
geometry_ratio=geometry_info.rho;
image_ratio=(double) image->columns/image->rows;
region_info->width=image->columns;
region_info->height=image->rows;
if ((flags & MaximumValue) != 0)
{
if (geometry_ratio < image_ratio)
region_info->height=CastDoubleToSizeT((double) image->rows*
image_ratio/geometry_ratio+0.5);
else
region_info->width=CastDoubleToSizeT((double) image->columns*
geometry_ratio/image_ratio+0.5);
}
else
if (geometry_ratio >= image_ratio)
region_info->height=CastDoubleToSizeT((double) image->rows*
image_ratio/geometry_ratio+0.5);
else
region_info->width=CastDoubleToSizeT((double) image->columns*
geometry_ratio/image_ratio+0.5);
}
/*
Adjust offset according to gravity setting.
*/
width=region_info->width;
height=region_info->height;
if (width == 0)
region_info->width=image->page.width | image->columns;
if (height == 0)
region_info->height=image->page.height | image->rows;
GravityAdjustGeometry(image->columns,image->rows,image->gravity,region_info);
if ((flags & LessValue) != 0)
if ((region_info->width < image->columns) &&
(region_info->height < image->rows))
{
SetGeometry(image,region_info);
return(NoValue);
}
if ((flags & GreaterValue) != 0)
if ((region_info->width > image->columns) &&
(region_info->height > image->rows))
{
SetGeometry(image,region_info);
return(NoValue);
}
region_info->width=width;
region_info->height=height;
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ P a r s e M e t a G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ParseMetaGeometry() is similar to GetGeometry() except the returned
% geometry is modified as determined by the meta characters: %, !, <, >, @,
% :, and ^ in relation to image resizing.
%
% Final image dimensions are adjusted so as to preserve the aspect ratio as
% much as possible, while generating a integer (pixel) size, and fitting the
% image within the specified geometry width and height.
%
% Flags are interpreted...
% % geometry size is given percentage of original width and height given
% ! do not try to preserve aspect ratio
% < only enlarge images smaller that geometry
% > only shrink images larger than geometry
% @ fit image to contain at most this many pixels
% : width and height denotes an aspect ratio
% ^ contain the given geometry given, (minimal dimensions given)
%
% The format of the ParseMetaGeometry method is:
%
% MagickStatusType ParseMetaGeometry(const char *geometry,ssize_t *x,
% ssize_t *y, size_t *width,size_t *height)
%
% A description of each parameter follows:
%
% o geometry: The geometry string (e.g. "100x100+10+10").
%
% o x,y: The x and y offset, set according to the geometry specification.
%
% o width,height: The width and height of original image, modified by
% the given geometry specification.
%
*/
MagickExport MagickStatusType ParseMetaGeometry(const char *geometry,ssize_t *x,
ssize_t *y,size_t *width,size_t *height)
{
GeometryInfo
geometry_info;
MagickStatusType
flags;
size_t
stasis_height,
stasis_width;
/*
Ensure the image geometry is valid.
*/
assert(x != (ssize_t *) NULL);
assert(y != (ssize_t *) NULL);
assert(width != (size_t *) NULL);
assert(height != (size_t *) NULL);
if (IsEventLogging() != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",geometry);
if ((geometry == (char *) NULL) || (*geometry == '\0'))
return(NoValue);
/*
Parse geometry using GetGeometry.
*/
stasis_width=(*width);
stasis_height=(*height);
SetGeometryInfo(&geometry_info);
flags=GetGeometry(geometry,x,y,width,height);
if ((flags & PercentValue) != 0)
{
MagickStatusType
percent_flags;
PointInfo
scale;
/*
Geometry is a percentage of the image size.
*/
percent_flags=ParseGeometry(geometry,&geometry_info);
scale.x=geometry_info.rho;
if ((percent_flags & RhoValue) == 0)
scale.x=100.0;
scale.y=geometry_info.sigma;
if ((percent_flags & SigmaValue) == 0)
scale.y=scale.x;
*width=CastDoubleToSizeT(scale.x*stasis_width/100.0+0.5);
*height=CastDoubleToSizeT(scale.y*stasis_height/100.0+0.5);
stasis_width=(*width);
stasis_height=(*height);
}
if ((flags & AspectRatioValue) != 0)
{
double
geometry_ratio,
image_ratio;
/*
Geometry is a relative to image size and aspect ratio.
*/
(void) ParseGeometry(geometry,&geometry_info);
geometry_ratio=geometry_info.rho;
image_ratio=(double) stasis_width*MagickSafeReciprocal((double)
stasis_height);
if (geometry_ratio >= image_ratio)
{
*width=stasis_width;
*height=CastDoubleToSizeT((double) (MagickSafeReciprocal(
geometry_ratio)*stasis_height*image_ratio)+0.5);
}
else
{
*width=CastDoubleToSizeT(MagickSafeReciprocal(image_ratio)*
stasis_width*geometry_ratio+0.5);
*height=stasis_height;
}
stasis_width=(*width);
stasis_height=(*height);
}
if (((flags & AspectValue) != 0) || ((*width == stasis_width) &&
(*height == stasis_height)))
{
if ((flags & RhoValue) == 0)
*width=stasis_width;
if ((flags & SigmaValue) == 0)
*height=stasis_height;
}
else
{
double
scale_factor;
/*
Respect aspect ratio of the image.
*/
if ((stasis_width == 0) || (stasis_height == 0))
scale_factor=1.0;
else
if (((flags & RhoValue) != 0) && (flags & SigmaValue) != 0)
{
scale_factor=(double) *width/(double) stasis_width;
if ((flags & MinimumValue) == 0)
{
if (scale_factor > ((double) *height/(double) stasis_height))
scale_factor=(double) *height/(double) stasis_height;
}
else
if (scale_factor < ((double) *height/(double) stasis_height))
scale_factor=(double) *height/(double) stasis_height;
}
else
if ((flags & RhoValue) != 0)
{
scale_factor=(double) *width/(double) stasis_width;
if (((flags & MinimumValue) != 0) &&
(scale_factor < ((double) *width/(double) stasis_height)))
scale_factor=(double) *width/(double) stasis_height;
}
else
{
scale_factor=(double) *height/(double) stasis_height;
if (((flags & MinimumValue) != 0) &&
(scale_factor < ((double) *height/(double) stasis_width)))
scale_factor=(double) *height/(double) stasis_width;
}
*width=CastDoubleToSizeT(MagickMax(floor(scale_factor*stasis_width+0.5),
1.0));
*height=CastDoubleToSizeT(MagickMax(floor(scale_factor*stasis_height+0.5),
1.0));
}
if ((flags & GreaterValue) != 0)
{
if (stasis_width < *width)
*width=stasis_width;
if (stasis_height < *height)
*height=stasis_height;
}
if ((flags & LessValue) != 0)
{
if (stasis_width > *width)
*width=stasis_width;
if (stasis_height > *height)
*height=stasis_height;
}
if ((flags & AreaValue) != 0)
{
double
area,
distance;
PointInfo
scale;
/*
Geometry is a maximum area in pixels.
*/
(void) ParseGeometry(geometry,&geometry_info);
area=geometry_info.rho+sqrt(MagickEpsilon);
distance=sqrt((double) stasis_width*stasis_height);
scale.x=(double) stasis_width*MagickSafeReciprocal(distance*
MagickSafeReciprocal(sqrt(area)));
scale.y=(double) stasis_height*MagickSafeReciprocal(distance*
MagickSafeReciprocal(sqrt(area)));
if ((scale.x < (double) *width) || (scale.y < (double) *height))
{
*width=CastDoubleToSizeT((double) stasis_width*MagickSafeReciprocal(
distance*MagickSafeReciprocal(sqrt(area)))+0.5);
*height=CastDoubleToSizeT((double) stasis_height*MagickSafeReciprocal(
distance*MagickSafeReciprocal(sqrt(area)))+0.5);
}
}
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P a r s e P a g e G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ParsePageGeometry() returns a region as defined by the geometry string with
% respect to the image page (canvas) dimensions.
%
% WARNING: Percentage dimensions remain relative to the actual image
% dimensions, and not canvas dimensions.
%
% The format of the ParsePageGeometry method is:
%
% MagickStatusType ParsePageGeometry(const Image *image,
% const char *geometry,RectangleInfo *region_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o geometry: The geometry string (e.g. "100x100+10+10").
%
% o region_info: the region as defined by the geometry string with
% respect to the image and its gravity.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickStatusType ParsePageGeometry(const Image *image,
const char *geometry,RectangleInfo *region_info,ExceptionInfo *exception)
{
MagickStatusType
flags;
SetGeometry(image,region_info);
if (image->page.width != 0)
region_info->width=image->page.width;
if (image->page.height != 0)
region_info->height=image->page.height;
flags=ParseAbsoluteGeometry(geometry,region_info);
if (flags == NoValue)
{
(void) ThrowMagickException(exception,GetMagickModule(),OptionError,
"InvalidGeometry","`%s'",geometry);
return(flags);
}
if ((flags & PercentValue) != 0)
{
region_info->width=image->columns;
region_info->height=image->rows;
}
flags=ParseMetaGeometry(geometry,&region_info->x,&region_info->y,
&region_info->width,&region_info->height);
if ((((flags & WidthValue) != 0) || ((flags & HeightValue) != 0)) &&
(((flags & PercentValue) != 0) || ((flags & SeparatorValue) == 0)))
{
if ((flags & WidthValue) == 0)
region_info->width=region_info->height;
if ((flags & HeightValue) == 0)
region_info->height=region_info->width;
}
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P a r s e R e g i o n G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ParseRegionGeometry() returns a region as defined by the geometry string
% with respect to the image dimensions and aspect ratio.
%
% This is basically a wrapper around ParseMetaGeometry. This is typically
% used to parse a geometry string to work out the final integer dimensions
% for image resizing.
%
% The format of the ParseRegionGeometry method is:
%
% MagickStatusType ParseRegionGeometry(const Image *image,
% const char *geometry,RectangleInfo *region_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o geometry: The geometry string (e.g. "100x100+10+10").
%
% o region_info: the region as defined by the geometry string.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickStatusType ParseRegionGeometry(const Image *image,
const char *geometry,RectangleInfo *region_info,ExceptionInfo *exception)
{
MagickStatusType
flags;
SetGeometry(image,region_info);
flags=ParseMetaGeometry(geometry,&region_info->x,&region_info->y,
&region_info->width,&region_info->height);
if (flags == NoValue)
(void) ThrowMagickException(exception,GetMagickModule(),OptionError,
"InvalidGeometry","`%s'",geometry);
return(flags);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% S e t G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SetGeometry() sets the geometry to its default values.
%
% The format of the SetGeometry method is:
%
% SetGeometry(const Image *image,RectangleInfo *geometry)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o geometry: the geometry.
%
*/
MagickExport void SetGeometry(const Image *image,RectangleInfo *geometry)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (IsEventLogging() != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(geometry != (RectangleInfo *) NULL);
(void) memset(geometry,0,sizeof(*geometry));
geometry->width=image->columns;
geometry->height=image->rows;
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% S e t G e o m e t r y I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SetGeometryInfo sets the GeometryInfo structure to its default values.
%
% The format of the SetGeometryInfo method is:
%
% SetGeometryInfo(GeometryInfo *geometry_info)
%
% A description of each parameter follows:
%
% o geometry_info: the geometry info structure.
%
*/
MagickExport void SetGeometryInfo(GeometryInfo *geometry_info)
{
assert(geometry_info != (GeometryInfo *) NULL);
if (IsEventLogging() != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
(void) memset(geometry_info,0,sizeof(*geometry_info));
}
_PageInfo
Definition geometry.c:62