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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% CCCC AAA PPPP TTTTT IIIII OOO N N %
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% C A A P P T I O O NN N %
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% C AAAAA PPPP T I O O N N N %
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% C A A P T I O O N NN %
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% CCCC A A P T IIIII OOO N N %
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% %
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% %
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% Read Text Caption. %
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% %
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% Software Design %
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% Cristy %
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% February 2002 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickCore/studio.h"
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#include "MagickCore/annotate.h"
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#include "MagickCore/artifact.h"
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/composite-private.h"
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#include "MagickCore/draw.h"
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#include "MagickCore/draw-private.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/image.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/list.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/module.h"
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#include "MagickCore/option.h"
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#include "MagickCore/property.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/resource_.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.h"
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#include "MagickCore/string-private.h"
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#include "MagickCore/utility.h"
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e a d C A P T I O N I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadCAPTIONImage() reads a CAPTION image file and returns it. It
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% allocates the memory necessary for the new Image structure and returns a
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% pointer to the new image.
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%
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% The format of the ReadCAPTIONImage method is:
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%
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% Image *ReadCAPTIONImage(const ImageInfo *image_info,
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% ExceptionInfo *exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *ReadCAPTIONImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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char
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*caption,
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geometry[MagickPathExtent],
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*text;
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const char
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*gravity,
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*option;
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DrawInfo
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*draw_info;
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Image
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*image;
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MagickBooleanType
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split,
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status;
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ssize_t
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i;
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size_t
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height,
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width;
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TypeMetric
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metrics;
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/*
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Initialize Image structure.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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image=AcquireImage(image_info,exception);
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(void) ResetImagePage(image,"0x0+0+0");
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if ((image->columns != 0) && (image->rows != 0))
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(void) SetImageBackgroundColor(image,exception);
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/*
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Format caption.
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*/
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option=GetImageOption(image_info,"filename");
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if (option == (const char *) NULL)
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caption=InterpretImageProperties((ImageInfo *) image_info,image,
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image_info->filename,exception);
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else
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if (LocaleNCompare(option,"caption:",8) == 0)
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caption=InterpretImageProperties((ImageInfo *) image_info,image,option+8,
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exception);
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else
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caption=InterpretImageProperties((ImageInfo *) image_info,image,option,
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exception);
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if (caption == (char *) NULL)
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return(DestroyImageList(image));
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(void) SetImageProperty(image,"caption",caption,exception);
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draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
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width=(size_t) floor(draw_info->pointsize*strlen(caption)+0.5);
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if (AcquireMagickResource(WidthResource,width) == MagickFalse)
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{
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caption=DestroyString(caption);
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draw_info=DestroyDrawInfo(draw_info);
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ThrowReaderException(ImageError,"WidthOrHeightExceedsLimit");
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}
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(void) CloneString(&draw_info->text,caption);
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gravity=GetImageOption(image_info,"gravity");
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if (gravity != (char *) NULL)
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draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
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MagickFalse,gravity);
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split=IsStringTrue(GetImageOption(image_info,"caption:split"));
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status=MagickTrue;
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(void) memset(&metrics,0,sizeof(metrics));
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if (image->columns == 0)
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{
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text=AcquireString(caption);
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i=FormatMagickCaption(image,draw_info,split,&metrics,&text,exception);
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(void) CloneString(&draw_info->text,text);
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text=DestroyString(text);
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(void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g",
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-metrics.bounds.x1,metrics.ascent);
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if (draw_info->gravity == UndefinedGravity)
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(void) CloneString(&draw_info->geometry,geometry);
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status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
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image->columns=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
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}
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if (image->rows == 0)
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{
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split=MagickTrue;
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text=AcquireString(caption);
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i=FormatMagickCaption(image,draw_info,split,&metrics,&text,exception);
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(void) CloneString(&draw_info->text,text);
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text=DestroyString(text);
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(void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g",
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-metrics.bounds.x1,metrics.ascent);
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if (draw_info->gravity == UndefinedGravity)
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(void) CloneString(&draw_info->geometry,geometry);
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status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
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image->rows=(size_t) ((i+1)*(metrics.ascent-metrics.descent+
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draw_info->interline_spacing+draw_info->stroke_width)+0.5);
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}
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if (status != MagickFalse)
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status=SetImageExtent(image,image->columns,image->rows,exception);
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if (status == MagickFalse)
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{
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caption=DestroyString(caption);
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draw_info=DestroyDrawInfo(draw_info);
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return(DestroyImageList(image));
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}
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if (SetImageBackgroundColor(image,exception) == MagickFalse)
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{
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caption=DestroyString(caption);
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draw_info=DestroyDrawInfo(draw_info);
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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if ((fabs(image_info->pointsize) < MagickEpsilon) && (strlen(caption) > 0))
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{
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double
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high,
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low;
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ssize_t
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n;
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/*
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Auto fit text into bounding box.
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*/
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option=GetImageOption(image_info,"caption:max-pointsize");
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if (option != (const char*) NULL)
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{
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high=StringToDouble(option,(char**) NULL);
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if (high < 1.0)
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high=1.0;
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high+=1.0;
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}
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else
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{
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for (n=0; n < 32; n++, draw_info->pointsize*=2.0)
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{
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text=AcquireString(caption);
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i=FormatMagickCaption(image,draw_info,split,&metrics,&text,
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exception);
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(void) CloneString(&draw_info->text,text);
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text=DestroyString(text);
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(void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g",
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-metrics.bounds.x1,metrics.ascent);
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if (draw_info->gravity == UndefinedGravity)
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(void) CloneString(&draw_info->geometry,geometry);
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status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
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if (status == MagickFalse)
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break;
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width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
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height=(size_t) floor(metrics.height+draw_info->interline_spacing+
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draw_info->stroke_width+0.5);
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if ((image->columns != 0) && (image->rows != 0))
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{
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if ((width >= image->columns) && (height >= image->rows))
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break;
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}
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else
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if (((image->columns != 0) && (width >= image->columns)) ||
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((image->rows != 0) && (height >= image->rows)))
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break;
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}
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high=draw_info->pointsize;
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}
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for (low=1.0; (high-low) > 0.5; )
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{
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draw_info->pointsize=(low+high)/2.0;
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text=AcquireString(caption);
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i=FormatMagickCaption(image,draw_info,split,&metrics,&text,
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exception);
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(void) CloneString(&draw_info->text,text);
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text=DestroyString(text);
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(void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g",
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-metrics.bounds.x1,metrics.ascent);
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if (draw_info->gravity == UndefinedGravity)
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(void) CloneString(&draw_info->geometry,geometry);
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status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
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if (status == MagickFalse)
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break;
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width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
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height=(size_t) floor(metrics.height+draw_info->interline_spacing+
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draw_info->stroke_width+0.5);
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if ((image->columns != 0) && (image->rows != 0))
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{
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if ((width < image->columns) && (height < image->rows))
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low=draw_info->pointsize+0.5;
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else
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high=draw_info->pointsize-0.5;
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}
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else
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if (((image->columns != 0) && (width < image->columns)) ||
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((image->rows != 0) && (height < image->rows)))
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low=draw_info->pointsize+0.5;
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else
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high=draw_info->pointsize-0.5;
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}
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draw_info->pointsize=floor((low+high)/2.0-0.5);
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}
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/*
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Draw caption.
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*/
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i=FormatMagickCaption(image,draw_info,split,&metrics,&caption,exception);
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(void) CloneString(&draw_info->text,caption);
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caption=DestroyString(caption);
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(void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g",MagickMax(
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draw_info->direction == RightToLeftDirection ? (double) image->columns-
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metrics.bounds.x2 : -metrics.bounds.x1,0.0),(draw_info->gravity ==
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UndefinedGravity ? MagickMax(metrics.ascent,metrics.bounds.y2) : 0.0));
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(void) CloneString(&draw_info->geometry,geometry);
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status=AnnotateImage(image,draw_info,exception);
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if (image_info->pointsize == 0.0)
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(void) FormatImageProperty(image,"caption:pointsize","%.*g",
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GetMagickPrecision(),draw_info->pointsize);
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(void) FormatImageProperty(image,"caption:lines","%.*g",GetMagickPrecision(),
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(double) (i+1));
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draw_info=DestroyDrawInfo(draw_info);
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if (status == MagickFalse)
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{
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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return(GetFirstImageInList(image));
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}
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/*
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|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
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% %
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% %
|
|
|
% %
|
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|
% R e g i s t e r C A P T I O N I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
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%
|
|
|
% RegisterCAPTIONImage() adds attributes for the CAPTION image format to
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% the list of supported formats. The attributes include the image format
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|
% tag, a method to read and/or write the format, whether the format
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|
% supports the saving of more than one frame to the same file or blob,
|
|
|
% whether the format supports native in-memory I/O, and a brief
|
|
|
% description of the format.
|
|
|
%
|
|
|
% The format of the RegisterCAPTIONImage method is:
|
|
|
%
|
|
|
% size_t RegisterCAPTIONImage(void)
|
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|
%
|
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|
*/
|
|
|
ModuleExport size_t RegisterCAPTIONImage(void)
|
|
|
{
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|
MagickInfo
|
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|
*entry;
|
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|
|
entry=AcquireMagickInfo("CAPTION","CAPTION","Caption");
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|
entry->decoder=(DecodeImageHandler *) ReadCAPTIONImage;
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|
entry->flags^=CoderAdjoinFlag;
|
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|
(void) RegisterMagickInfo(entry);
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|
|
return(MagickImageCoderSignature);
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}
|
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|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r C A P T I O N I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% UnregisterCAPTIONImage() removes format registrations made by the
|
|
|
% CAPTION module from the list of supported formats.
|
|
|
%
|
|
|
% The format of the UnregisterCAPTIONImage method is:
|
|
|
%
|
|
|
% UnregisterCAPTIONImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport void UnregisterCAPTIONImage(void)
|
|
|
{
|
|
|
(void) UnregisterMagickInfo("CAPTION");
|
|
|
}
|
