2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
8 % W W W BBBB M M M PPPP %
13 % Read/Write Wireless Bitmap (level 0) Image Format %
20 % Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
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. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
41 #include "MagickCore/studio.h"
42 #include "MagickCore/attribute.h"
43 #include "MagickCore/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/cache.h"
46 #include "MagickCore/color-private.h"
47 #include "MagickCore/colormap.h"
48 #include "MagickCore/colorspace.h"
49 #include "MagickCore/colorspace-private.h"
50 #include "MagickCore/exception.h"
51 #include "MagickCore/exception-private.h"
52 #include "MagickCore/image.h"
53 #include "MagickCore/image-private.h"
54 #include "MagickCore/list.h"
55 #include "MagickCore/magick.h"
56 #include "MagickCore/memory_.h"
57 #include "MagickCore/monitor.h"
58 #include "MagickCore/monitor-private.h"
59 #include "MagickCore/pixel-accessor.h"
60 #include "MagickCore/quantum-private.h"
61 #include "MagickCore/static.h"
62 #include "MagickCore/string_.h"
63 #include "MagickCore/module.h"
68 static MagickBooleanType
69 WriteWBMPImage(const ImageInfo *,Image *,ExceptionInfo *);
72 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
76 % R e a d W B M P I m a g e %
80 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
82 % ReadWBMPImage() reads a WBMP (level 0) image file and returns it. It
83 % allocates the memory necessary for the new Image structure and returns a
84 % pointer to the new image.
86 % ReadWBMPImage was contributed by Milan Votava <votava@mageo.cz>.
88 % The format of the ReadWBMPImage method is:
90 % Image *ReadWBMPImage(const ImageInfo *image_info,
91 % ExceptionInfo *exception)
93 % A description of each parameter follows:
95 % o image_info: the image info.
97 % o exception: return any errors or warnings in this structure.
101 static MagickBooleanType WBMPReadInteger(Image *image,size_t *value)
109 byte=ReadBlobByte(image);
113 *value|=(unsigned int) (byte & 0x7f);
114 } while (byte & 0x80);
118 static Image *ReadWBMPImage(const ImageInfo *image_info,
119 ExceptionInfo *exception)
148 assert(image_info != (const ImageInfo *) NULL);
149 assert(image_info->signature == MagickSignature);
150 if (image_info->debug != MagickFalse)
151 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
152 image_info->filename);
153 assert(exception != (ExceptionInfo *) NULL);
154 assert(exception->signature == MagickSignature);
155 image=AcquireImage(image_info,exception);
156 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
157 if (status == MagickFalse)
159 image=DestroyImageList(image);
160 return((Image *) NULL);
162 if (ReadBlob(image,2,(unsigned char *) &header) == 0)
163 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
165 ThrowReaderException(CoderError,"OnlyLevelZerofilesSupported");
167 Initialize image structure.
169 if (WBMPReadInteger(image,&image->columns) == MagickFalse)
170 ThrowReaderException(CorruptImageError,"CorruptWBMPimage");
171 if (WBMPReadInteger(image,&image->rows) == MagickFalse)
172 ThrowReaderException(CorruptImageError,"CorruptWBMPimage");
173 if ((image->columns == 0) || (image->rows == 0))
174 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
175 if (DiscardBlobBytes(image,image->offset) == MagickFalse)
176 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
178 if (AcquireImageColormap(image,2,exception) == MagickFalse)
179 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
180 if (image_info->ping != MagickFalse)
182 (void) CloseBlob(image);
183 return(GetFirstImageInList(image));
186 Convert bi-level image to pixel packets.
188 for (y=0; y < (ssize_t) image->rows; y++)
190 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
191 if (q == (Quantum *) NULL)
195 for (x=0; x < (ssize_t) image->columns; x++)
199 byte=ReadBlobByte(image);
201 ThrowReaderException(CorruptImageError,"CorruptImage");
203 SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 1 : 0,q);
207 q+=GetPixelChannels(image);
209 if (SyncAuthenticPixels(image,exception) == MagickFalse)
211 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
213 if (status == MagickFalse)
216 (void) SyncImage(image,exception);
217 if (EOFBlob(image) != MagickFalse)
218 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
220 (void) CloseBlob(image);
221 return(GetFirstImageInList(image));
225 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
229 % R e g i s t e r W B M P I m a g e %
233 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
235 % RegisterWBMPImage() adds attributes for the WBMP image format to
236 % the list of supported formats. The attributes include the image format
237 % tag, a method to read and/or write the format, whether the format
238 % supports the saving of more than one frame to the same file or blob,
239 % whether the format supports native in-memory I/O, and a brief
240 % description of the format.
242 % The format of the RegisterWBMPImage method is:
244 % size_t RegisterWBMPImage(void)
247 ModuleExport size_t RegisterWBMPImage(void)
252 entry=SetMagickInfo("WBMP");
253 entry->decoder=(DecodeImageHandler *) ReadWBMPImage;
254 entry->encoder=(EncodeImageHandler *) WriteWBMPImage;
255 entry->adjoin=MagickFalse;
256 entry->description=ConstantString("Wireless Bitmap (level 0) image");
257 entry->module=ConstantString("WBMP");
258 (void) RegisterMagickInfo(entry);
259 return(MagickImageCoderSignature);
263 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
267 % U n r e g i s t e r W B M P I m a g e %
271 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
273 % UnregisterWBMPImage() removes format registrations made by the
274 % WBMP module from the list of supported formats.
276 % The format of the UnregisterWBMPImage method is:
278 % UnregisterWBMPImage(void)
281 ModuleExport void UnregisterWBMPImage(void)
283 (void) UnregisterMagickInfo("WBMP");
287 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
291 % W r i t e W B M P I m a g e %
295 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
297 % WriteWBMPImage() writes an image to a file in the Wireless Bitmap
298 % (level 0) image format.
300 % WriteWBMPImage was contributed by Milan Votava <votava@mageo.cz>.
302 % The format of the WriteWBMPImage method is:
304 % MagickBooleanType WriteWBMPImage(const ImageInfo *image_info,
305 % Image *image,ExceptionInfo *exception)
307 % A description of each parameter follows.
309 % o image_info: the image info.
311 % o image: The image.
313 % o exception: return any errors or warnings in this structure.
317 static void WBMPWriteInteger(Image *image,const size_t value)
334 for (i=4; i >= 0; i--)
336 octet=(unsigned char) ((value >> bits) & 0x7f);
337 if ((flag == 0) && (octet != 0))
342 buffer[4-i]=octet | (i && (flag || octet))*(0x01 << 7);
345 (void) WriteBlob(image,(size_t) n,buffer+5-n);
348 static MagickBooleanType WriteWBMPImage(const ImageInfo *image_info,
349 Image *image,ExceptionInfo *exception)
354 register const Quantum
368 Open output image file.
370 assert(image_info != (const ImageInfo *) NULL);
371 assert(image_info->signature == MagickSignature);
372 assert(image != (Image *) NULL);
373 assert(image->signature == MagickSignature);
374 if (image->debug != MagickFalse)
375 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
376 assert(exception != (ExceptionInfo *) NULL);
377 assert(exception->signature == MagickSignature);
378 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
379 if (status == MagickFalse)
381 if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
382 (void) TransformImageColorspace(image,sRGBColorspace,exception);
384 Convert image to a bi-level image.
386 (void) SetImageType(image,BilevelType,exception);
387 (void) WriteBlobMSBShort(image,0);
388 WBMPWriteInteger(image,image->columns);
389 WBMPWriteInteger(image,image->rows);
390 for (y=0; y < (ssize_t) image->rows; y++)
392 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
393 if (p == (const Quantum *) NULL)
397 for (x=0; x < (ssize_t) image->columns; x++)
399 if (GetPixelIntensity(image,p) >= ((double) QuantumRange/2.0))
400 byte|=0x1 << (7-bit);
404 (void) WriteBlobByte(image,byte);
408 p+=GetPixelChannels(image);
411 (void) WriteBlobByte(image,byte);
412 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
414 if (status == MagickFalse)
417 (void) CloseBlob(image);