| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % FFFFF DDDD % |
| % F D D % |
| % FFF D D % |
| % F D D % |
| % F DDDD % |
| % % |
| % % |
| % Retrieve An Image Via a File Descriptor. % |
| % % |
| % Software Design % |
| % Cristy % |
| % Bill Radcliffe % |
| % March 2000 % |
| % % |
| % % |
| % Copyright 1999-2017 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/blob.h" |
| #include "MagickCore/blob-private.h" |
| #include "MagickCore/constitute.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/module.h" |
| #include "MagickCore/quantum-private.h" |
| #include "MagickCore/static.h" |
| #include "MagickCore/resource_.h" |
| #include "MagickCore/string_.h" |
| #include "MagickCore/string-private.h" |
| #include "MagickCore/utility.h" |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e a d F D I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ReadFDImage retrieves an image via a file descriptor, decodes the image, |
| % 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 ReadFDImage method is: |
| % |
| % Image *ReadFDImage(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 *ReadFDImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| { |
| Image |
| *image; |
| |
| ImageInfo |
| *read_info; |
| |
| /* |
| Open image file. |
| */ |
| 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); |
| read_info=CloneImageInfo(image_info); |
| read_info->file=fdopen(StringToLong(image_info->filename),"rb"); |
| if ((read_info->file == (FILE *) NULL) || |
| (IsGeometry(image_info->filename) == MagickFalse)) |
| { |
| read_info=DestroyImageInfo(read_info); |
| ThrowFileException(exception,BlobError,"UnableToOpenBlob", |
| image_info->filename); |
| return((Image *) NULL); |
| } |
| *read_info->magick='\0'; |
| image=ReadImage(read_info,exception); |
| (void) fclose(read_info->file); |
| read_info=DestroyImageInfo(read_info); |
| if (image == (Image *) NULL) |
| { |
| (void) ThrowMagickException(exception,GetMagickModule(),CoderError, |
| "NoDataReturned","`%s'",image_info->filename); |
| return((Image *) NULL); |
| } |
| return(GetFirstImageInList(image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % R e g i s t e r F D I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % RegisterFDImage() adds attributes for the FD image format to |
| % the list of supported formats. The attributes 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 RegisterFDImage method is: |
| % |
| % size_t RegisterFDImage(void) |
| % |
| */ |
| ModuleExport size_t RegisterFDImage(void) |
| { |
| MagickInfo |
| *entry; |
| |
| entry=AcquireMagickInfo("FD","FD","Read image from a file descriptor"); |
| entry->decoder=(DecodeImageHandler *) ReadFDImage; |
| entry->flags|=CoderStealthFlag; |
| (void) RegisterMagickInfo(entry); |
| return(MagickImageCoderSignature); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % U n r e g i s t e r F D I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % UnregisterFDImage() removes format registrations made by the FD module from |
| % the list of supported formats. |
| % |
| % The format of the UnregisterFDImage method is: |
| % |
| % UnregisterFDImage(void) |
| % |
| */ |
| ModuleExport void UnregisterFDImage(void) |
| { |
| (void) UnregisterMagickInfo("FD"); |
| } |