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gerrit-public.fairphone.software / platform / external / ImageMagick / e21dc9672535f72681a722d45c90c8211fc411ff / . / MagickCore / geometry.c
blob: f138dde798c3945fb3d4a612f7e1700c2606d9dd [file] [log] [blame]
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 %
% John Cristy %
% January 2003 %
% %
% %
% Copyright 1999-2012 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 %
% %
% 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. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
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/memory_.h"
#include "MagickCore/string_.h"
#include "MagickCore/string-private.h"
#include "MagickCore/token.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 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[MaxTextExtent],
*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) >= (MaxTextExtent-1))
return(flags);
(void) CopyMagickString(pedantic_geometry,geometry,MaxTextExtent);
for (p=pedantic_geometry; *p != '\0'; )
{
if (isspace((int) ((unsigned char) *p)) != 0)
{
(void) CopyMagickString(p,p+1,MaxTextExtent);
continue;
}
c=(int) ((unsigned int) *p);
switch (c)
{
case '%':
{
flags|=PercentValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '!':
{
flags|=AspectValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '<':
{
flags|=LessValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '>':
{
flags|=GreaterValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '^':
{
flags|=MinimumValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '@':
{
flags|=AreaValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '(':
case ')':
{
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '-':
case '.':
case ',':
case '+':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case 'x':
case 'X':
case 215:
{
p++;
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);
c=(int) ((unsigned char) *q);
if ((c == 215) || (*q == 'x') || (*q == 'X') || (*q == '\0'))
{
/*
Parse width.
*/
q=p;
if (LocaleNCompare(p,"0x",2) == 0)
*width=(size_t) strtol(p,&p,10);
else
*width=(size_t) floor(StringToDouble(p,&p)+0.5);
if (p != q)
flags|=WidthValue;
}
c=(*p);
c=(int) ((unsigned char) *p);
if ((c == 215) || (*p == 'x') || (*p == 'X'))
{
p++;
if ((*p != '+') && (*p != '-'))
{
/*
Parse height.
*/
q=p;
*height=(size_t) floor(StringToDouble(p,&p)+0.5);
if (p != q)
flags|=HeightValue;
}
}
if ((*p == '+') || (*p == '-'))
{
/*
Parse x value.
*/
if (*p == '-')
flags|=XNegative;
q=p;
*x=(ssize_t) ceil(StringToDouble(p,&p)-0.5);
if (p != q)
flags|=XValue;
if ((*p == '+') || (*p == '-'))
{
/*
Parse y value.
*/
if (*p == '-')
flags|=YNegative;
q=p;
*y=(ssize_t) ceil(StringToDouble(p,&p)-0.5);
if (p != q)
flags|=YValue;
}
}
return(flags);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t P a g e G e o m e t r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetPageGeometry() replaces any page mneumonic 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)
{
static const char
*PageSizes[][2]=
{
{ "4x6", "288x432" },
{ "5x7", "360x504" },
{ "7x9", "504x648" },
{ "8x10", "576x720" },
{ "9x11", "648x792" },
{ "9x12", "648x864" },
{ "10x13", "720x936" },
{ "10x14", "720x1008" },
{ "11x17", "792x1224" },
{ "a0", "2384x3370" },
{ "a1", "1684x2384" },
{ "a10", "73x105" },
{ "a2", "1191x1684" },
{ "a3", "842x1191" },
{ "a4", "595x842" },
{ "a4smaLL", "595x842" },
{ "a5", "420x595" },
{ "a6", "297x420" },
{ "a7", "210x297" },
{ "a8", "148x210" },
{ "a9", "105x148" },
{ "archa", "648x864" },
{ "archb", "864x1296" },
{ "archC", "1296x1728" },
{ "archd", "1728x2592" },
{ "arche", "2592x3456" },
{ "b0", "2920x4127" },
{ "b1", "2064x2920" },
{ "b10", "91x127" },
{ "b2", "1460x2064" },
{ "b3", "1032x1460" },
{ "b4", "729x1032" },
{ "b5", "516x729" },
{ "b6", "363x516" },
{ "b7", "258x363" },
{ "b8", "181x258" },
{ "b9", "127x181" },
{ "c0", "2599x3676" },
{ "c1", "1837x2599" },
{ "c2", "1298x1837" },
{ "c3", "918x1296" },
{ "c4", "649x918" },
{ "c5", "459x649" },
{ "c6", "323x459" },
{ "c7", "230x323" },
{ "executive", "540x720" },
{ "flsa", "612x936" },
{ "flse", "612x936" },
{ "folio", "612x936" },
{ "halfletter", "396x612" },
{ "isob0", "2835x4008" },
{ "isob1", "2004x2835" },
{ "isob10", "88x125" },
{ "isob2", "1417x2004" },
{ "isob3", "1001x1417" },
{ "isob4", "709x1001" },
{ "isob5", "499x709" },
{ "isob6", "354x499" },
{ "isob7", "249x354" },
{ "isob8", "176x249" },
{ "isob9", "125x176" },
{ "jisb0", "1030x1456" },
{ "jisb1", "728x1030" },
{ "jisb2", "515x728" },
{ "jisb3", "364x515" },
{ "jisb4", "257x364" },
{ "jisb5", "182x257" },
{ "jisb6", "128x182" },
{ "ledger", "1224x792" },
{ "legal", "612x1008" },
{ "letter", "612x792" },
{ "lettersmaLL", "612x792" },
{ "quarto", "610x780" },
{ "statement", "396x612" },
{ "tabloid", "792x1224" },
{ (char *) NULL, (char *) NULL }
};
char
*page;
register ssize_t
i;
assert(page_geometry != (char *) NULL);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",page_geometry);
page=AcquireString(page_geometry);
for (i=0; *PageSizes[i] != (char *) NULL; i++)
if (LocaleNCompare(PageSizes[i][0],page,strlen(PageSizes[i][0])) == 0)
{
RectangleInfo
geometry;
MagickStatusType
flags;
/*
Replace mneumonic with the equivalent size in dots-per-inch.
*/
(void) CopyMagickString(page,PageSizes[i][1],MaxTextExtent);
(void) ConcatenateMagickString(page,page_geometry+
strlen(PageSizes[i][0]),MaxTextExtent);
flags=GetGeometry(page,&geometry.x,&geometry.y,&geometry.width,
&geometry.height);
if ((flags & GreaterValue) == 0)
(void) ConcatenateMagickString(page,">",MaxTextExtent);
break;
}
return(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=(ssize_t) (width-region->width-region->x);
break;
}
case NorthGravity:
case SouthGravity:
case CenterGravity:
case StaticGravity:
{
region->x+=(ssize_t) (width/2-region->width/2);
break;
}
case ForgetGravity:
case NorthWestGravity:
case WestGravity:
case SouthWestGravity:
default:
break;
}
switch (gravity)
{
case SouthWestGravity:
case SouthGravity:
case SouthEastGravity:
{
region->y=(ssize_t) (height-region->height-region->y);
break;
}
case EastGravity:
case WestGravity:
case CenterGravity:
case StaticGravity:
{
region->y+=(ssize_t) (height/2-region->height/2);
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);
if (flags == NoValue)
flags=ParseGeometry(geometry+1,&geometry_info); /* i.e. +-4+-4 */
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);
(void) value;
if (p == geometry)
return(MagickFalse);
if (strspn(geometry,"0123456789-, ") != strlen(geometry))
return(MagickFalse);
if ((pedantic != MagickFalse) && (strchr(geometry,',') != (char *) NULL))
return(MagickFalse);
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[MaxTextExtent];
const char
*p;
double
determinant;
MagickStatusType
flags;
register ssize_t
i;
GetAffineMatrix(affine_matrix);
flags=NoValue;
p=(char *) geometry;
for (i=0; (*p != '\0') && (i < 6); i++)
{
GetMagickToken(p,&p,token);
if (*token == ',')
GetMagickToken(p,&p,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,
"InvalidGeometry","`%s'",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.
%
% 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[MaxTextExtent],
*q;
double
value;
int
c;
MagickStatusType
flags;
/*
Remove whitespaces meta characters from geometry specification.
*/
assert(geometry_info != (GeometryInfo *) NULL);
flags=NoValue;
if ((geometry == (char *) NULL) || (*geometry == '\0'))
return(flags);
if (strlen(geometry) >= (MaxTextExtent-1))
return(flags);
(void) CopyMagickString(pedantic_geometry,geometry,MaxTextExtent);
for (p=pedantic_geometry; *p != '\0'; )
{
if (isspace((int) ((unsigned char) *p)) != 0)
{
(void) CopyMagickString(p,p+1,MaxTextExtent);
continue;
}
c=(int) ((unsigned char) *p);
switch (c)
{
case '%':
{
flags|=PercentValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '!':
{
flags|=AspectValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '<':
{
flags|=LessValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '>':
{
flags|=GreaterValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '^':
{
flags|=MinimumValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '@':
{
flags|=AreaValue;
(void) CopyMagickString(p,p+1,MaxTextExtent);
break;
}
case '(':
case ')':
{
(void) CopyMagickString(p,p+1,MaxTextExtent);
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 'x':
case 'X':
case '/':
case ':':
case 215:
{
p++;
break;
}
case '.':
{
p++;
flags|=DecimalValue;
break;
}
default:
return(flags);
}
}
/*
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)
value=(double) 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')) || ((*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++;
q=p;
value=StringToDouble(p,&p);
if (p != q)
{
flags|=XiValue;
if (*q == '-')
flags|=XiNegative;
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++;
q=p;
value=StringToDouble(p,&p);
if (p != q)
{
flags|=PsiValue;
if (*q == '-')
flags|=PsiNegative;
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++;
q=p;
value=StringToDouble(p,&p);
if (p != q)
{
flags|=ChiValue;
if (*q == '-')
flags|=ChiNegative;
geometry_info->chi=value;
}
}
}
if (strchr(pedantic_geometry,':') != (char *) NULL)
{
/*
Normalize sampling factor (e.g. 4:2:2 => 2x1).
*/
geometry_info->rho/=geometry_info->sigma;
geometry_info->sigma=1.0;
if (geometry_info->xi == 0.0)
geometry_info->sigma=2.0;
}
if (((flags & SigmaValue) == 0) && ((flags & XiValue) != 0) &&
((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&=(~XiValue);
}
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 specifing 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,
% RectangeInfo *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;
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=(size_t) floor((scale.x*image->columns/100.0)+0.5);
region_info->height=(size_t) floor((scale.y*image->rows/100.0)+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);
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 image size
% ! 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
% ^ 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.
%
*/
static inline size_t MagickMax(const size_t x,
const size_t y)
{
if (x > y)
return(x);
return(y);
}
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
former_height,
former_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 ((geometry == (char *) NULL) || (*geometry == '\0'))
return(NoValue);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",geometry);
/*
Parse geometry using GetGeometry.
*/
SetGeometryInfo(&geometry_info);
former_width=(*width);
former_height=(*height);
flags=GetGeometry(geometry,x,y,width,height);
if ((flags & PercentValue) != 0)
{
MagickStatusType
flags;
PointInfo
scale;
/*
Geometry is a percentage of the image size.
*/
flags=ParseGeometry(geometry,&geometry_info);
scale.x=geometry_info.rho;
if ((flags & RhoValue) == 0)
scale.x=100.0;
scale.y=geometry_info.sigma;
if ((flags & SigmaValue) == 0)
scale.y=scale.x;
*width=(size_t) floor(scale.x*former_width/100.0+0.5);
if (*width == 0)
*width=1;
*height=(size_t) floor(scale.y*former_height/100.0+0.5);
if (*height == 0)
*height=1;
former_width=(*width);
former_height=(*height);
}
if (((flags & AspectValue) != 0) || ((*width == former_width) &&
(*height == former_height)))
{
if ((flags & RhoValue) == 0)
*width=former_width;
if ((flags & SigmaValue) == 0)
*height=former_height;
}
else
{
double
scale_factor;
/*
Respect aspect ratio of the image.
*/
if ((former_width == 0) || (former_height == 0))
scale_factor=1.0;
else
if (((flags & RhoValue) != 0) && (flags & SigmaValue) != 0)
{
scale_factor=(double) *width/(double) former_width;
if ((flags & MinimumValue) == 0)
{
if (scale_factor > ((double) *height/(double) former_height))
scale_factor=(double) *height/(double) former_height;
}
else
if (scale_factor < ((double) *height/(double) former_height))
scale_factor=(double) *height/(double) former_height;
}
else
if ((flags & RhoValue) != 0)
{
scale_factor=(double) *width/(double) former_width;
if (((flags & MinimumValue) != 0) &&
(scale_factor < ((double) *width/(double) former_height)))
scale_factor=(double) *width/(double) former_height;
}
else
{
scale_factor=(double) *height/(double) former_height;
if (((flags & MinimumValue) != 0) &&
(scale_factor < ((double) *height/(double) former_width)))
scale_factor=(double) *height/(double) former_width;
}
*width=MagickMax((size_t) floor(scale_factor*former_width+0.5),1UL);
*height=MagickMax((size_t) floor(scale_factor*former_height+0.5),1UL);
}
if ((flags & GreaterValue) != 0)
{
if (former_width < *width)
*width=former_width;
if (former_height < *height)
*height=former_height;
}
if ((flags & LessValue) != 0)
{
if (former_width > *width)
*width=former_width;
if (former_height > *height)
*height=former_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;
distance=sqrt((double) former_width*former_height);
scale.x=former_width/(distance/sqrt((double) area));
scale.y=former_height/(distance/sqrt((double) area));
if ((scale.x < (double) *width) || (scale.y < (double) *height))
{
*width=(size_t) (former_width/(distance/sqrt(area))+0.5);
*height=(size_t) (former_height/(distance/sqrt(area))+0.5);
}
former_width=(*width);
former_height=(*height);
}
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,RectangeInfo *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);
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,RectangeInfo *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 == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(geometry != (RectangleInfo *) NULL);
(void) ResetMagickMemory(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);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
(void) ResetMagickMemory(geometry_info,0,sizeof(*geometry_info));
}