wmf.c revision f1d91246f9ab47d524abc076c6ead91e5cc27d03 
1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3%                                                                             %
4%                                                                             %
5%                                                                             %
6%                             W   W   M   M  FFFFF                            %
7%                             W   W   MM MM  F                                %
8%                             W W W   M M M  FFF                              %
9%                             WW WW   M   M  F                                %
10%                             W   W   M   M  F                                %
11%                                                                             %
12%                                                                             %
13%                        Read Windows Metafile Format                         %
14%                                                                             %
15%                              Software Design                                %
16%                                John Cristy                                  %
17%                               December 2000                                 %
18%                                                                             %
19%                                                                             %
20%  Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization      %
21%  dedicated to making software imaging solutions freely available.           %
22%                                                                             %
23%  You may not use this file except in compliance with the License.  You may  %
24%  obtain a copy of the License at                                            %
25%                                                                             %
26%    http://www.imagemagick.org/script/license.php                            %
27%                                                                             %
28%  Unless required by applicable law or agreed to in writing, software        %
29%  distributed under the License is distributed on an "AS IS" BASIS,          %
30%  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
31%  See the License for the specific language governing permissions and        %
32%  limitations under the License.                                             %
33%                                                                             %
34%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35*/
36
37/*
38  Include declarations.
39*/
40#include "magick/studio.h"
41#include "magick/property.h"
42#include "magick/blob.h"
43#include "magick/blob-private.h"
44#include "magick/color.h"
45#include "magick/color-private.h"
46#include "magick/constitute.h"
47#include "magick/exception.h"
48#include "magick/exception-private.h"
49#include "magick/image.h"
50#include "magick/image-private.h"
51#include "magick/list.h"
52#include "magick/log.h"
53#include "magick/magick.h"
54#include "magick/memory_.h"
55#include "magick/monitor.h"
56#include "magick/monitor-private.h"
57#include "magick/paint.h"
58#include "magick/quantum-private.h"
59#include "magick/static.h"
60#include "magick/string_.h"
61#include "magick/module.h"
62#include "magick/type.h"
63#include "magick/module.h"
64#include "wand/MagickWand.h"
65
66#if defined(MAGICKCORE_WMF_DELEGATE)
67#include "libwmf/api.h"
68#include "libwmf/eps.h"
69
70/*
71%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72%                                                                             %
73%                                                                             %
74%                                                                             %
75%   R e a d W M F I m a g e                                                   %
76%                                                                             %
77%                                                                             %
78%                                                                             %
79%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
80%
81%  ReadWMFImage() reads an Windows Metafile image file and returns it.  It
82%  allocates the memory necessary for the new Image structure and returns a
83%  pointer to the new image.
84%
85%  The format of the ReadWMFImage method is:
86%
87%      Image *ReadWMFImage(const ImageInfo *image_info,ExceptionInfo *exception)
88%
89%  A description of each parameter follows:
90%
91%    o image_info: the image info.
92%
93%    o exception: return any errors or warnings in this structure.
94%
95*/
96
97static int WMFReadBlob(void *image)
98{
99  return(ReadBlobByte((Image *) image));
100}
101
102static int WMFSeekBlob(void *image,long offset)
103{
104  return((int) SeekBlob((Image *) image,(MagickOffsetType) offset,SEEK_SET));
105}
106
107static long WMFTellBlob(void *image)
108{
109  return((long) TellBlob((Image*) image));
110}
111
112static Image *ReadWMFImage(const ImageInfo *image_info,ExceptionInfo *exception)
113{
114  char
115    filename[MaxTextExtent];
116
117  int
118    unique_file;
119
120  FILE
121    *file;
122
123  Image
124    *image;
125
126  ImageInfo
127    *read_info;
128
129  MagickBooleanType
130    status;
131
132  size_t
133    flags;
134
135  wmfAPI
136    *wmf_info;
137
138  wmfAPI_Options
139    options;
140
141  wmfD_Rect
142    bounding_box;
143
144  wmf_eps_t
145    *eps_info;
146
147  wmf_error_t
148    wmf_status;
149
150  /*
151    Read WMF image.
152  */
153  image=AcquireImage(image_info);
154  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
155  if (status == MagickFalse)
156    {
157      image=DestroyImageList(image);
158      return((Image *) NULL);
159    }
160  wmf_info=(wmfAPI *) NULL;
161  flags=0;
162  flags|=WMF_OPT_IGNORE_NONFATAL;
163  flags|=WMF_OPT_FUNCTION;
164  options.function=wmf_eps_function;
165  wmf_status=wmf_api_create(&wmf_info,flags,&options);
166  if (wmf_status != wmf_E_None)
167    {
168      if (wmf_info != (wmfAPI *) NULL)
169        wmf_api_destroy(wmf_info);
170      ThrowReaderException(DelegateError,"UnableToInitializeWMFLibrary");
171    }
172  wmf_status=wmf_bbuf_input(wmf_info,WMFReadBlob,WMFSeekBlob,WMFTellBlob,
173    (void *) image);
174  if (wmf_status != wmf_E_None)
175    {
176      wmf_api_destroy(wmf_info);
177      ThrowFileException(exception,FileOpenError,"UnableToOpenFile",
178        image->filename);
179      image=DestroyImageList(image);
180      return((Image *) NULL);
181    }
182  wmf_status=wmf_scan(wmf_info,0,&bounding_box);
183  if (wmf_status != wmf_E_None)
184    {
185      wmf_api_destroy(wmf_info);
186      ThrowReaderException(DelegateError,"FailedToScanFile");
187    }
188  eps_info=WMF_EPS_GetData(wmf_info);
189  file=(FILE *) NULL;
190  unique_file=AcquireUniqueFileResource(filename);
191  if (unique_file != -1)
192    file=fdopen(unique_file,"wb");
193  if ((unique_file == -1) || (file == (FILE *) NULL))
194    {
195      wmf_api_destroy(wmf_info);
196      ThrowReaderException(FileOpenError,"UnableToCreateTemporaryFile");
197    }
198  eps_info->out=wmf_stream_create(wmf_info,file);
199  eps_info->bbox=bounding_box;
200  wmf_status=wmf_play(wmf_info,0,&bounding_box);
201  if (wmf_status != wmf_E_None)
202    {
203      wmf_api_destroy(wmf_info);
204      ThrowReaderException(DelegateError,"FailedToRenderFile");
205    }
206  (void) fclose(file);
207  wmf_api_destroy(wmf_info);
208  (void) CloseBlob(image);
209  image=DestroyImage(image);
210  /*
211    Read EPS image.
212  */
213  read_info=CloneImageInfo(image_info);
214  (void) FormatMagickString(read_info->filename,MaxTextExtent,"eps:%.1024s",
215    filename);
216  image=ReadImage(read_info,exception);
217  read_info=DestroyImageInfo(read_info);
218  if (image != (Image *) NULL)
219    {
220      (void) CopyMagickString(image->filename,image_info->filename,
221        MaxTextExtent);
222      (void) CopyMagickString(image->magick_filename,image_info->filename,
223        MaxTextExtent);
224      (void) CopyMagickString(image->magick,"WMF",MaxTextExtent);
225    }
226  (void) RelinquishUniqueFileResource(filename);
227  return(GetFirstImageInList(image));
228}
229#endif
230
231/*
232%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
233%                                                                             %
234%                                                                             %
235%                                                                             %
236%   R e g i s t e r W M F I m a g e                                           %
237%                                                                             %
238%                                                                             %
239%                                                                             %
240%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
241%
242%  RegisterWMFImage() adds attributes for the WMF image format to
243%  the list of supported formats.  The attributes include the image format
244%  tag, a method to read and/or write the format, whether the format
245%  supports the saving of more than one frame to the same file or blob,
246%  whether the format supports native in-memory I/O, and a brief
247%  description of the format.
248%
249%  The format of the RegisterWMFImage method is:
250%
251%      size_t RegisterWMFImage(void)
252%
253*/
254ModuleExport size_t RegisterWMFImage(void)
255{
256  MagickInfo
257    *entry;
258
259  entry = SetMagickInfo("WMZ");
260#if defined(MAGICKCORE_WMF_DELEGATE)
261  entry->decoder=ReadWMFImage;
262#endif
263  entry->description=ConstantString("Compressed Windows Meta File");
264  entry->module=ConstantString("WMZ");
265  (void) RegisterMagickInfo(entry);
266  entry=SetMagickInfo("WMF");
267#if defined(MAGICKCORE_WMF_DELEGATE)
268  entry->decoder=ReadWMFImage;
269#endif
270  entry->description=ConstantString("Windows Meta File");
271  entry->module=ConstantString("WMF");
272  (void) RegisterMagickInfo(entry);
273  return(MagickImageCoderSignature);
274}
275
276/*
277%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
278%                                                                             %
279%                                                                             %
280%                                                                             %
281%   U n r e g i s t e r W M F I m a g e                                       %
282%                                                                             %
283%                                                                             %
284%                                                                             %
285%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
286%
287%  UnregisterWMFImage() removes format registrations made by the
288%  WMF module from the list of supported formats.
289%
290%  The format of the UnregisterWMFImage method is:
291%
292%      UnregisterWMFImage(void)
293%
294*/
295ModuleExport void UnregisterWMFImage(void)
296{
297  (void) UnregisterMagickInfo("WMZ");
298  (void) UnregisterMagickInfo("WMF");
299}
300