2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
8 % W W W BBBB M M M PPPP %
13 % Read/Write Wireless Bitmap (level 0) Image Format %
20 % Copyright 1999-2015 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));
185 status=SetImageExtent(image,image->columns,image->rows,exception);
186 if (status == MagickFalse)
187 return(DestroyImageList(image));
189 Convert bi-level image to pixel packets.
191 for (y=0; y < (ssize_t) image->rows; y++)
193 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
194 if (q == (Quantum *) NULL)
198 for (x=0; x < (ssize_t) image->columns; x++)
202 byte=ReadBlobByte(image);
204 ThrowReaderException(CorruptImageError,"CorruptImage");
206 SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 1 : 0,q);
210 q+=GetPixelChannels(image);
212 if (SyncAuthenticPixels(image,exception) == MagickFalse)
214 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
216 if (status == MagickFalse)
219 (void) SyncImage(image,exception);
220 if (EOFBlob(image) != MagickFalse)
221 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
223 (void) CloseBlob(image);
224 return(GetFirstImageInList(image));
228 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
232 % R e g i s t e r W B M P I m a g e %
236 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
238 % RegisterWBMPImage() adds attributes for the WBMP image format to
239 % the list of supported formats. The attributes include the image format
240 % tag, a method to read and/or write the format, whether the format
241 % supports the saving of more than one frame to the same file or blob,
242 % whether the format supports native in-memory I/O, and a brief
243 % description of the format.
245 % The format of the RegisterWBMPImage method is:
247 % size_t RegisterWBMPImage(void)
250 ModuleExport size_t RegisterWBMPImage(void)
255 entry=SetMagickInfo("WBMP");
256 entry->decoder=(DecodeImageHandler *) ReadWBMPImage;
257 entry->encoder=(EncodeImageHandler *) WriteWBMPImage;
258 entry->flags^=Adjoin;
259 entry->description=ConstantString("Wireless Bitmap (level 0) image");
260 entry->module=ConstantString("WBMP");
261 (void) RegisterMagickInfo(entry);
262 return(MagickImageCoderSignature);
266 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
270 % U n r e g i s t e r W B M P I m a g e %
274 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
276 % UnregisterWBMPImage() removes format registrations made by the
277 % WBMP module from the list of supported formats.
279 % The format of the UnregisterWBMPImage method is:
281 % UnregisterWBMPImage(void)
284 ModuleExport void UnregisterWBMPImage(void)
286 (void) UnregisterMagickInfo("WBMP");
290 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
294 % W r i t e W B M P I m a g e %
298 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
300 % WriteWBMPImage() writes an image to a file in the Wireless Bitmap
301 % (level 0) image format.
303 % WriteWBMPImage was contributed by Milan Votava <votava@mageo.cz>.
305 % The format of the WriteWBMPImage method is:
307 % MagickBooleanType WriteWBMPImage(const ImageInfo *image_info,
308 % Image *image,ExceptionInfo *exception)
310 % A description of each parameter follows.
312 % o image_info: the image info.
314 % o image: The image.
316 % o exception: return any errors or warnings in this structure.
320 static void WBMPWriteInteger(Image *image,const size_t value)
337 for (i=4; i >= 0; i--)
339 octet=(unsigned char) ((value >> bits) & 0x7f);
340 if ((flag == 0) && (octet != 0))
345 buffer[4-i]=octet | (i && (flag || octet))*(0x01 << 7);
348 (void) WriteBlob(image,(size_t) n,buffer+5-n);
351 static MagickBooleanType WriteWBMPImage(const ImageInfo *image_info,
352 Image *image,ExceptionInfo *exception)
357 register const Quantum
371 Open output image file.
373 assert(image_info != (const ImageInfo *) NULL);
374 assert(image_info->signature == MagickSignature);
375 assert(image != (Image *) NULL);
376 assert(image->signature == MagickSignature);
377 if (image->debug != MagickFalse)
378 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
379 assert(exception != (ExceptionInfo *) NULL);
380 assert(exception->signature == MagickSignature);
381 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
382 if (status == MagickFalse)
384 (void) TransformImageColorspace(image,sRGBColorspace,exception);
386 Convert image to a bi-level image.
388 (void) SetImageType(image,BilevelType,exception);
389 (void) WriteBlobMSBShort(image,0);
390 WBMPWriteInteger(image,image->columns);
391 WBMPWriteInteger(image,image->rows);
392 for (y=0; y < (ssize_t) image->rows; y++)
394 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
395 if (p == (const Quantum *) NULL)
399 for (x=0; x < (ssize_t) image->columns; x++)
401 if (GetPixelLuma(image,p) >= (QuantumRange/2.0))
402 byte|=0x1 << (7-bit);
406 (void) WriteBlobByte(image,byte);
410 p+=GetPixelChannels(image);
413 (void) WriteBlobByte(image,byte);
414 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
416 if (status == MagickFalse)
419 (void) CloseBlob(image);