300 lines
12 KiB
C
300 lines
12 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% L AAA BBBB EEEEE L %
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% L A A B B E L %
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% L AAAAA BBBB EEE L %
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% L A A B B E L %
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% LLLLL A A BBBB EEEEE LLLLL %
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% %
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% %
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% Read ASCII String As An Image. %
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% %
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% Software Design %
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% John Cristy %
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% July 1992 %
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% %
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% %
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% Copyright 1999-2013 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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% http://www.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 "magick/studio.h"
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#include "magick/annotate.h"
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#include "magick/blob.h"
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#include "magick/blob-private.h"
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#include "magick/draw.h"
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#include "magick/exception.h"
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#include "magick/exception-private.h"
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#include "magick/image.h"
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#include "magick/image-private.h"
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#include "magick/list.h"
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#include "magick/magick.h"
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#include "magick/memory_.h"
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#include "magick/pixel-accessor.h"
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#include "magick/property.h"
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#include "magick/quantum-private.h"
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#include "magick/static.h"
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#include "magick/string_.h"
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#include "magick/module.h"
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#include "magick/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 L A B E L 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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% ReadLABELImage() reads a LABEL 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 ReadLABELImage method is:
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%
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% Image *ReadLABELImage(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 *ReadLABELImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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char
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geometry[MaxTextExtent],
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*property;
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const char
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*label;
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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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status;
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TypeMetric
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metrics;
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size_t
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height,
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width;
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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 == MagickSignature);
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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 == MagickSignature);
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image=AcquireImage(image_info);
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(void) ResetImagePage(image,"0x0+0+0");
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property=InterpretImageProperties(image_info,image,image_info->filename);
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(void) SetImageProperty(image,"label",property);
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property=DestroyString(property);
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label=GetImageProperty(image,"label");
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draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
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draw_info->text=ConstantString(label);
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if ((*label != '\0') && (image->rows != 0) && (image_info->pointsize == 0.0))
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{
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double
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high,
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low;
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/*
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Auto fit text into bounding box.
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*/
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status=GetMultilineTypeMetrics(image,draw_info,&metrics);
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for ( ; ; )
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{
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(void) FormatLocaleString(geometry,MaxTextExtent,"%+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);
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(void) status;
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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->stroke_width+0.5);
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if ((width > image->columns) && (height > image->rows))
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break;
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draw_info->pointsize*=2.0;
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}
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high=draw_info->pointsize/2.0;
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low=high/2.0;
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while ((high-low) > 1.0)
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{
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draw_info->pointsize=(low+high)/2.0;
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(void) FormatLocaleString(geometry,MaxTextExtent,"%+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);
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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->stroke_width+0.5);
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if ((width <= image->columns) && (height <= image->rows))
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low=draw_info->pointsize+1.0;
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else
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high=draw_info->pointsize-1.0;
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}
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for (draw_info->pointsize=(low+high)/2.0; (high-low) > 1.0; )
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{
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(void) FormatLocaleString(geometry,MaxTextExtent,"%+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);
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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->stroke_width+0.5);
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if ((width <= image->columns) && (height <= image->rows))
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break;
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draw_info->pointsize--;
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}
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draw_info->pointsize=floor(draw_info->pointsize);
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}
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status=GetMultilineTypeMetrics(image,draw_info,&metrics);
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if (status == MagickFalse)
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{
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InheritException(exception,&image->exception);
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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if (image->columns == 0)
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image->columns=(size_t) (metrics.width+draw_info->stroke_width+1.5);
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if (image->columns == 0)
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image->columns=(size_t) (draw_info->pointsize+draw_info->stroke_width+1.5);
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if (draw_info->gravity == UndefinedGravity)
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{
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(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
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-metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
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draw_info->stroke_width/2.0);
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(void) CloneString(&draw_info->geometry,geometry);
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}
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if (draw_info->direction == RightToLeftDirection)
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{
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if (draw_info->direction == RightToLeftDirection)
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(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
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image->columns-(metrics.bounds.x2+draw_info->stroke_width/2.0),
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metrics.ascent+draw_info->stroke_width/2.0);
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(void) CloneString(&draw_info->geometry,geometry);
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}
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if (image->rows == 0)
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image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
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if (image->rows == 0)
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image->rows=(size_t) floor(draw_info->pointsize+draw_info->stroke_width+
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0.5);
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if (SetImageBackgroundColor(image) == MagickFalse)
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{
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InheritException(exception,&image->exception);
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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(void) AnnotateImage(image,draw_info);
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if (image_info->pointsize == 0.0)
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{
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char
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pointsize[MaxTextExtent];
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(void) FormatLocaleString(pointsize,MaxTextExtent,"%.20g",
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draw_info->pointsize);
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(void) SetImageProperty(image,"label:pointsize",pointsize);
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}
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draw_info=DestroyDrawInfo(draw_info);
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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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% %
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% R e g i s t e r L A B E L 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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% RegisterLABELImage() adds properties for the LABEL image format to
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% the list of supported formats. The properties 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,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterLABELImage method is:
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%
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% size_t RegisterLABELImage(void)
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%
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*/
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ModuleExport size_t RegisterLABELImage(void)
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{
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MagickInfo
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*entry;
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entry=SetMagickInfo("LABEL");
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entry->decoder=(DecodeImageHandler *) ReadLABELImage;
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entry->adjoin=MagickFalse;
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entry->format_type=ImplicitFormatType;
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entry->description=ConstantString("Image label");
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entry->module=ConstantString("LABEL");
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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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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% U n r e g i s t e r L A B E L 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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% UnregisterLABELImage() removes format registrations made by the
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% LABEL module from the list of supported formats.
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%
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% The format of the UnregisterLABELImage method is:
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%
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% UnregisterLABELImage(void)
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%
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*/
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ModuleExport void UnregisterLABELImage(void)
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{
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(void) UnregisterMagickInfo("LABEL");
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}
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