| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % L AAA BBBB EEEEE L % |
| % L A A B B E L % |
| % L AAAAA BBBB EEE L % |
| % L A A B B E L % |
| % LLLLL A A BBBB EEEEE LLLLL % |
| % % |
| % % |
| % Read ASCII String As An Image. % |
| % % |
| % Software Design % |
| % Cristy % |
| % July 1992 % |
| % % |
| % % |
| % Copyright 1999-2021 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/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/annotate.h" |
| #include "MagickCore/artifact.h" |
| #include "MagickCore/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/draw.h" |
| #include "MagickCore/exception.h" |
| #include "MagickCore/exception-private.h" |
| #include "MagickCore/image.h" |
| #include "MagickCore/image-private.h" |
| #include "MagickCore/list.h" |
| #include "MagickCore/magick.h" |
| #include "MagickCore/memory_.h" |
| #include "MagickCore/property.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/resource_.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/module.h" |
| #include "MagickCore/utility.h" |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d L A B E L I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadLABELImage() reads a LABEL image file and returns it. It |
| % allocates the memory necessary for the new Image structure and returns a |
| % pointer to the new image. |
| % |
| % The format of the ReadLABELImage method is: |
| % |
| % Image *ReadLABELImage(const ImageInfo *image_info, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image_info: the image info. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| static Image *ReadLABELImage(const ImageInfo *image_info, |
| ExceptionInfo *exception) |
| { |
| char |
| geometry[MagickPathExtent], |
| *label; |
| |
| DrawInfo |
| *draw_info; |
| |
| Image |
| *image; |
| |
| MagickBooleanType |
| status; |
| |
| TypeMetric |
| metrics; |
| |
| size_t |
| height, |
| width; |
| |
| /* |
| Initialize Image structure. |
| */ |
| assert(image_info != (const ImageInfo *) NULL); |
| assert(image_info->signature == MagickCoreSignature); |
| if (image_info->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
| image_info->filename); |
| assert(exception != (ExceptionInfo *) NULL); |
| assert(exception->signature == MagickCoreSignature); |
| image=AcquireImage(image_info,exception); |
| (void) ResetImagePage(image,"0x0+0+0"); |
| if ((image->columns != 0) && (image->rows != 0)) |
| { |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| return(DestroyImageList(image)); |
| (void) SetImageBackgroundColor(image,exception); |
| } |
| label=InterpretImageProperties((ImageInfo *) image_info,image, |
| image_info->filename,exception); |
| if (label == (char *) NULL) |
| return(DestroyImageList(image)); |
| (void) SetImageProperty(image,"label",label,exception); |
| draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL); |
| width=(size_t) floor(draw_info->pointsize*strlen(label)+0.5); |
| if (AcquireMagickResource(WidthResource,width) == MagickFalse) |
| { |
| label=DestroyString(label); |
| draw_info=DestroyDrawInfo(draw_info); |
| ThrowReaderException(ImageError,"WidthOrHeightExceedsLimit"); |
| } |
| draw_info->text=ConstantString(label); |
| (void) memset(&metrics,0,sizeof(metrics)); |
| status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception); |
| if ((image->columns == 0) && (image->rows == 0)) |
| { |
| image->columns=(size_t) floor(metrics.width+draw_info->stroke_width+0.5); |
| image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5); |
| } |
| else |
| if ((status != MagickFalse) && (strlen(label) > 0) && |
| (((image->columns == 0) || (image->rows == 0)) || |
| (fabs(image_info->pointsize) < MagickEpsilon))) |
| { |
| double |
| high, |
| low; |
| |
| ssize_t |
| n; |
| |
| /* |
| Auto fit text into bounding box. |
| */ |
| for (n=0; n < 32; n++, draw_info->pointsize*=2.0) |
| { |
| (void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g", |
| -metrics.bounds.x1,metrics.ascent); |
| if (draw_info->gravity == UndefinedGravity) |
| (void) CloneString(&draw_info->geometry,geometry); |
| status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception); |
| if (status == MagickFalse) |
| break; |
| width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5); |
| height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5); |
| if ((image->columns != 0) && (image->rows != 0)) |
| { |
| if ((width >= image->columns) && (height >= image->rows)) |
| break; |
| } |
| else |
| if (((image->columns != 0) && (width >= image->columns)) || |
| ((image->rows != 0) && (height >= image->rows))) |
| break; |
| } |
| if (status == MagickFalse) |
| { |
| label=DestroyString(label); |
| draw_info=DestroyDrawInfo(draw_info); |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| high=draw_info->pointsize; |
| for (low=1.0; (high-low) > 0.5; ) |
| { |
| draw_info->pointsize=(low+high)/2.0; |
| (void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g", |
| -metrics.bounds.x1,metrics.ascent); |
| if (draw_info->gravity == UndefinedGravity) |
| (void) CloneString(&draw_info->geometry,geometry); |
| status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception); |
| if (status == MagickFalse) |
| break; |
| width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5); |
| height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5); |
| if ((image->columns != 0) && (image->rows != 0)) |
| { |
| if ((width < image->columns) && (height < image->rows)) |
| low=draw_info->pointsize+0.5; |
| else |
| high=draw_info->pointsize-0.5; |
| } |
| else |
| if (((image->columns != 0) && (width < image->columns)) || |
| ((image->rows != 0) && (height < image->rows))) |
| low=draw_info->pointsize+0.5; |
| else |
| high=draw_info->pointsize-0.5; |
| } |
| if (status != MagickFalse) |
| { |
| draw_info->pointsize=floor((low+high)/2.0-0.5); |
| status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception); |
| } |
| } |
| label=DestroyString(label); |
| if (status == MagickFalse) |
| { |
| draw_info=DestroyDrawInfo(draw_info); |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| if (image->columns == 0) |
| image->columns=(size_t) floor(metrics.width+draw_info->stroke_width+0.5); |
| if (image->columns == 0) |
| image->columns=(size_t) floor(draw_info->pointsize+draw_info->stroke_width+ |
| 0.5); |
| if (image->rows == 0) |
| image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5); |
| if (image->rows == 0) |
| image->rows=(size_t) floor(draw_info->pointsize+draw_info->stroke_width+ |
| 0.5); |
| status=SetImageExtent(image,image->columns,image->rows,exception); |
| if (status == MagickFalse) |
| { |
| draw_info=DestroyDrawInfo(draw_info); |
| return(DestroyImageList(image)); |
| } |
| if (SetImageBackgroundColor(image,exception) == MagickFalse) |
| { |
| draw_info=DestroyDrawInfo(draw_info); |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| /* |
| Draw label. |
| */ |
| (void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g", |
| (draw_info->direction == RightToLeftDirection ? (double) image->columns- |
| metrics.bounds.x2 : 0.0),(draw_info->gravity == UndefinedGravity ? |
| MagickMax(metrics.ascent,metrics.bounds.y2) : 0.0)); |
| (void) CloneString(&draw_info->geometry,geometry); |
| status=AnnotateImage(image,draw_info,exception); |
| if (image_info->pointsize == 0.0) |
| (void) FormatImageProperty(image,"label:pointsize","%.20g", |
| draw_info->pointsize); |
| draw_info=DestroyDrawInfo(draw_info); |
| if (status == MagickFalse) |
| { |
| image=DestroyImageList(image); |
| return((Image *) NULL); |
| } |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r L A B E L I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterLABELImage() adds properties for the LABEL image format to |
| % the list of supported formats. The properties include the image format |
| % tag, a method to read and/or write the format, whether the format |
| % 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 RegisterLABELImage method is: |
| % |
| % size_t RegisterLABELImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterLABELImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("LABEL","LABEL","Image label"); |
| entry->decoder=(DecodeImageHandler *) ReadLABELImage; |
| entry->flags^=CoderAdjoinFlag; |
| entry->format_type=ImplicitFormatType; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r L A B E L I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterLABELImage() removes format registrations made by the |
| % LABEL module from the list of supported formats. |
| % |
| % The format of the UnregisterLABELImage method is: |
| % |
| % UnregisterLABELImage(void) |
| % |
| */ |
| ModuleExport void UnregisterLABELImage(void) |
| { |
| (void) UnregisterMagickInfo("LABEL"); |
| } |
