1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 %                                                                             %
4 %                                                                             %
5 %                                                                             %
6 %        CCCC  L      IIIII  PPPP   BBBB    OOO    AAA   RRRR   DDDD          %
7 %       C      L        I    P   P  B   B  O   O  A   A  R   R  D   D         %
8 %       C      L        I    PPP    BBBB   O   O  AAAAA  RRRR   D   D         %
9 %       C      L        I    P      B   B  O   O  A   A  R R    D   D         %
10 %        CCCC  LLLLL  IIIII  P      BBBB    OOO   A   A  R  R   DDDD          %
11 %                                                                             %
12 %                                                                             %
13 %                        Read/Write Windows Clipboard.                        %
14 %                                                                             %
15 %                              Software Design                                %
16 %                             Leonard Rosenthol                               %
17 %                                 May 2002                                    %
18 %                                                                             %
19 %                                                                             %
20 %  Copyright 1999-2021 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 %    https://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 
39 /*
40   Include declarations.
41 */
42 #include "MagickCore/studio.h"
43 #if defined(MAGICKCORE_WINGDI32_DELEGATE)
44 #  if defined(__CYGWIN__)
45 #    include <windows.h>
46 #  else
47      /* All MinGW needs ... */
48 #    include "MagickCore/nt-base-private.h"
49 #    include <wingdi.h>
50 #  endif
51 #endif
52 #include "MagickCore/blob.h"
53 #include "MagickCore/blob-private.h"
54 #include "MagickCore/cache.h"
55 #include "MagickCore/exception.h"
56 #include "MagickCore/exception-private.h"
57 #include "MagickCore/image.h"
58 #include "MagickCore/image-private.h"
59 #include "MagickCore/list.h"
60 #include "MagickCore/magick.h"
61 #include "MagickCore/memory_.h"
62 #include "MagickCore/nt-feature.h"
63 #include "MagickCore/pixel-accessor.h"
64 #include "MagickCore/quantum-private.h"
65 #include "MagickCore/static.h"
66 #include "MagickCore/string_.h"
67 #include "MagickCore/module.h"
68 
69 #define BMP_HEADER_SIZE 14
70 
71 /*
72   Forward declarations.
73 */
74 #if defined(MAGICKCORE_WINGDI32_DELEGATE)
75 static MagickBooleanType
76   WriteCLIPBOARDImage(const ImageInfo *,Image *,ExceptionInfo *);
77 #endif
78 
79 /*
80 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
81 %                                                                             %
82 %                                                                             %
83 %                                                                             %
84 %   R e a d C L I P B O A R D I m a g e                                       %
85 %                                                                             %
86 %                                                                             %
87 %                                                                             %
88 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
89 %
90 %  ReadCLIPBOARDImage() reads an image from the system clipboard and returns
91 %  it.  It allocates the memory necessary for the new Image structure and
92 %  returns a pointer to the new image.
93 %
94 %  The format of the ReadCLIPBOARDImage method is:
95 %
96 %      Image *ReadCLIPBOARDImage(const ImageInfo *image_info,
97 %        ExceptionInfo exception)
98 %
99 %  A description of each parameter follows:
100 %
101 %    o image_info: the image info.
102 %
103 %    o exception: return any errors or warnings in this structure.
104 %
105 */
106 #if defined(MAGICKCORE_WINGDI32_DELEGATE)
ReadCLIPBOARDImage(const ImageInfo * image_info,ExceptionInfo * exception)107 static Image *ReadCLIPBOARDImage(const ImageInfo *image_info,
108   ExceptionInfo *exception)
109 {
110   unsigned char
111     *p;
112 
113   HANDLE
114     clip_handle;
115 
116   Image
117     *image;
118 
119   ImageInfo
120     *read_info;
121 
122   LPVOID
123     clip_mem;
124 
125   size_t
126     clip_size,
127     total_size;
128 
129   unsigned char
130     offset;
131 
132   void
133     *clip_data;
134 
135   assert(image_info != (const ImageInfo *) NULL);
136   assert(image_info->signature == MagickCoreSignature);
137   if (image_info->debug != MagickFalse)
138     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
139       image_info->filename);
140   assert(exception != (ExceptionInfo *) NULL);
141   assert(exception->signature == MagickCoreSignature);
142   image=AcquireImage(image_info,exception);
143   if (!IsClipboardFormatAvailable(CF_DIB) &&
144       !IsClipboardFormatAvailable(CF_DIBV5))
145     ThrowReaderException(CoderError,"NoBitmapOnClipboard");
146   if (!OpenClipboard(NULL))
147     ThrowReaderException(CoderError,"UnableToReadImageData");
148   clip_handle=GetClipboardData(CF_DIBV5);
149   if (!clip_handle)
150     clip_handle=GetClipboardData(CF_DIB);
151   if ((clip_handle == NULL) || (clip_handle == INVALID_HANDLE_VALUE))
152     {
153       CloseClipboard();
154       ThrowReaderException(CoderError,"UnableToReadImageData");
155     }
156   clip_size=(size_t) GlobalSize(clip_handle);
157   total_size=clip_size+BMP_HEADER_SIZE;
158   clip_data=AcquireMagickMemory(total_size);
159   if (clip_data == (void *) NULL)
160     {
161       CloseClipboard();
162       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
163     }
164   clip_mem=GlobalLock(clip_handle);
165   if (clip_mem == (LPVOID) NULL)
166     {
167       CloseClipboard();
168       clip_data=RelinquishMagickMemory(clip_data);
169       ThrowReaderException(CoderError,"UnableToReadImageData");
170     }
171   p=(unsigned char *) clip_data;
172   p+=BMP_HEADER_SIZE;
173   (void) memcpy(p,clip_mem,clip_size);
174   (void) GlobalUnlock(clip_mem);
175   (void) CloseClipboard();
176   memset(clip_data,0,BMP_HEADER_SIZE);
177   offset=p[0];
178   if ((p[0] == 40) && (p[16] == BI_BITFIELDS))
179     offset+=12;
180   else
181     {
182       unsigned int
183         image_size;
184 
185       image_size=(unsigned int) p[20];
186       image_size|=(unsigned int) p[21] << 8;
187       image_size|=(unsigned int) p[22] << 16;
188       image_size|=(unsigned int) p[23] << 24;
189       /* Hack for chrome where the offset seems to be incorrect */
190       if (clip_size - offset - image_size == 12)
191         offset+=12;
192     }
193   offset+=BMP_HEADER_SIZE;
194   p-=BMP_HEADER_SIZE;
195   p[0]='B';
196   p[1]='M';
197   p[2]=(unsigned char) total_size;
198   p[3]=(unsigned char) (total_size >> 8);
199   p[4]=(unsigned char) (total_size >> 16);
200   p[5]=(unsigned char) (total_size >> 24);
201   p[10]=offset;
202   read_info=CloneImageInfo(image_info);
203   (void) CopyMagickString(read_info->magick,"BMP",MagickPathExtent);
204   image=BlobToImage(read_info,clip_data,total_size,exception);
205   read_info=DestroyImageInfo(read_info);
206   clip_data=RelinquishMagickMemory(clip_data);
207   return(image);
208 }
209 #endif /* MAGICKCORE_WINGDI32_DELEGATE */
210 
211 /*
212 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
213 %                                                                             %
214 %                                                                             %
215 %                                                                             %
216 %   R e g i s t e r C L I P B O A R D I m a g e                               %
217 %                                                                             %
218 %                                                                             %
219 %                                                                             %
220 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
221 %
222 %  RegisterCLIPBOARDImage() adds attributes for the clipboard "image format" to
223 %  the list of supported formats.  The attributes include the image format
224 %  tag, a method to read and/or write the format, whether the format
225 %  supports the saving of more than one frame to the same file or blob,
226 %  whether the format supports native in-memory I/O, and a brief
227 %  description of the format.
228 %
229 %  The format of the RegisterCLIPBOARDImage method is:
230 %
231 %      size_t RegisterCLIPBOARDImage(void)
232 %
233 */
RegisterCLIPBOARDImage(void)234 ModuleExport size_t RegisterCLIPBOARDImage(void)
235 {
236   MagickInfo
237     *entry;
238 
239   entry=AcquireMagickInfo("CLIPBOARD","CLIPBOARD","The system clipboard");
240 #if defined(MAGICKCORE_WINGDI32_DELEGATE)
241   entry->decoder=(DecodeImageHandler *) ReadCLIPBOARDImage;
242   entry->encoder=(EncodeImageHandler *) WriteCLIPBOARDImage;
243 #endif
244   entry->flags^=CoderAdjoinFlag;
245   entry->format_type=ImplicitFormatType;
246   (void) RegisterMagickInfo(entry);
247   return(MagickImageCoderSignature);
248 }
249 
250 /*
251 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
252 %                                                                             %
253 %                                                                             %
254 %                                                                             %
255 %   U n r e g i s t e r C L I P B O A R D I m a g e                           %
256 %                                                                             %
257 %                                                                             %
258 %                                                                             %
259 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
260 %
261 %  UnregisterCLIPBOARDImage() removes format registrations made by the
262 %  RGB module from the list of supported formats.
263 %
264 %  The format of the UnregisterCLIPBOARDImage method is:
265 %
266 %      UnregisterCLIPBOARDImage(void)
267 %
268 */
UnregisterCLIPBOARDImage(void)269 ModuleExport void UnregisterCLIPBOARDImage(void)
270 {
271   (void) UnregisterMagickInfo("CLIPBOARD");
272 }
273 
274 /*
275 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
276 %                                                                             %
277 %                                                                             %
278 %                                                                             %
279 %   W r i t e C L I P B O A R D I m a g e                                     %
280 %                                                                             %
281 %                                                                             %
282 %                                                                             %
283 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
284 %
285 %  WriteCLIPBOARDImage() writes an image to the system clipboard.
286 %
287 %  The format of the WriteCLIPBOARDImage method is:
288 %
289 %      MagickBooleanType WriteCLIPBOARDImage(const ImageInfo *image_info,
290 %        Image *image,ExceptionInfo *exception)
291 %
292 %  A description of each parameter follows.
293 %
294 %    o image_info: the image info.
295 %
296 %    o image:  The image.
297 %
298 %    o exception: return any errors or warnings in this structure.
299 %
300 */
301 #if defined(MAGICKCORE_WINGDI32_DELEGATE)
WriteCLIPBOARDImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)302 static MagickBooleanType WriteCLIPBOARDImage(const ImageInfo *image_info,
303   Image *image,ExceptionInfo *exception)
304 {
305   HANDLE
306     clip_handle;
307 
308   ImageInfo
309     *write_info;
310 
311   LPVOID
312     clip_mem;
313 
314   size_t
315     length;
316 
317   unsigned char
318     *p;
319 
320   void
321     *clip_data;
322 
323   assert(image_info != (const ImageInfo *) NULL);
324   assert(image_info->signature == MagickCoreSignature);
325   assert(image != (Image *) NULL);
326   assert(image->signature == MagickCoreSignature);
327   if (image->debug != MagickFalse)
328     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
329   if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
330     ThrowWriterException(CoderError,"UnableToWriteImageData");
331   write_info=CloneImageInfo(image_info);
332   if (image->alpha_trait == UndefinedPixelTrait)
333     (void) CopyMagickString(write_info->magick,"BMP3",MagickPathExtent);
334   else
335     (void) CopyMagickString(write_info->magick,"BMP",MagickPathExtent);
336   clip_data=ImageToBlob(write_info,image,&length,exception);
337   write_info=DestroyImageInfo(write_info);
338   if (clip_data == (void *) NULL)
339     ThrowWriterException(CoderError,"UnableToWriteImageData");
340   clip_handle=(HANDLE) GlobalAlloc(GMEM_MOVEABLE,length-BMP_HEADER_SIZE);
341   if (clip_handle == (HANDLE) NULL)
342     {
343       clip_data=RelinquishMagickMemory(clip_data);
344       ThrowWriterException(CoderError,"UnableToWriteImageData");
345     }
346   clip_mem=GlobalLock(clip_handle);
347   if (clip_mem == (LPVOID) NULL)
348     {
349       (void) GlobalFree((HGLOBAL) clip_handle);
350       clip_data=RelinquishMagickMemory(clip_data);
351       ThrowWriterException(CoderError,"UnableToWriteImageData");
352     }
353   p=(unsigned char *) clip_data;
354   p+=BMP_HEADER_SIZE;
355   (void) memcpy(clip_mem,p,length-BMP_HEADER_SIZE);
356   (void) GlobalUnlock(clip_mem);
357   clip_data=RelinquishMagickMemory(clip_data);
358   if (!OpenClipboard(NULL))
359     {
360       (void) GlobalFree((HGLOBAL) clip_handle);
361       ThrowWriterException(CoderError,"UnableToWriteImageData");
362     }
363   (void) EmptyClipboard();
364   if (image->alpha_trait == UndefinedPixelTrait)
365     SetClipboardData(CF_DIB,clip_handle);
366   else
367     SetClipboardData(CF_DIBV5,clip_handle);
368   (void) CloseClipboard();
369   return(MagickTrue);
370 }
371 #endif /* MAGICKCORE_WINGDI32_DELEGATE */
372