2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
14 % Read MacPaint Image Format %
21 % Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization %
22 % dedicated to making software imaging solutions freely available. %
24 % You may not use this file except in compliance with the License. You may %
25 % obtain a copy of the License at %
27 % http://www.imagemagick.org/script/license.php %
29 % Unless required by applicable law or agreed to in writing, software %
30 % distributed under the License is distributed on an "AS IS" BASIS, %
31 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
32 % See the License for the specific language governing permissions and %
33 % limitations under the License. %
35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
43 #include "MagickCore/studio.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/cache.h"
47 #include "MagickCore/colormap.h"
48 #include "MagickCore/colorspace.h"
49 #include "MagickCore/exception.h"
50 #include "MagickCore/exception-private.h"
51 #include "MagickCore/image.h"
52 #include "MagickCore/image-private.h"
53 #include "MagickCore/list.h"
54 #include "MagickCore/magick.h"
55 #include "MagickCore/memory_.h"
56 #include "MagickCore/monitor.h"
57 #include "MagickCore/monitor-private.h"
58 #include "MagickCore/pixel-accessor.h"
59 #include "MagickCore/quantum-private.h"
60 #include "MagickCore/static.h"
61 #include "MagickCore/string_.h"
62 #include "MagickCore/module.h"
65 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
69 % R e a d M A C I m a g e %
73 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
75 % ReadMACImage() reads an MacPaint image file and returns it. It
76 % allocates the memory necessary for the new Image structure and returns a
77 % pointer to the new image.
79 % The format of the ReadMACImage method is:
81 % Image *ReadMACImage(const ImageInfo *image_info,ExceptionInfo *exception)
83 % A description of each parameter follows:
85 % o image_info: the image info.
87 % o exception: return any errors or warnings in this structure.
90 static Image *ReadMACImage(const ImageInfo *image_info,ExceptionInfo *exception)
104 register unsigned char
123 assert(image_info != (const ImageInfo *) NULL);
124 assert(image_info->signature == MagickSignature);
125 if (image_info->debug != MagickFalse)
126 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
127 image_info->filename);
128 assert(exception != (ExceptionInfo *) NULL);
129 assert(exception->signature == MagickSignature);
130 image=AcquireImage(image_info);
131 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
132 if (status == MagickFalse)
134 image=DestroyImageList(image);
135 return((Image *) NULL);
140 length=ReadBlobLSBShort(image);
141 if ((length & 0xff) != 0)
142 ThrowReaderException(CorruptImageError,"CorruptImage");
143 for (x=0; x < (ssize_t) 638; x++)
144 if (ReadBlobByte(image) == EOF)
145 ThrowReaderException(CorruptImageError,"CorruptImage");
149 if (AcquireImageColormap(image,2) == MagickFalse)
150 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
151 if (image_info->ping != MagickFalse)
153 (void) CloseBlob(image);
154 return(GetFirstImageInList(image));
157 Convert MAC raster image to pixel packets.
159 length=(image->columns+7)/8;
160 pixels=(unsigned char *) AcquireQuantumMemory(length+1,sizeof(*pixels));
161 if (pixels == (unsigned char *) NULL)
162 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
165 for (y=0; y < (ssize_t) image->rows; )
167 count=(unsigned char) ReadBlobByte(image);
168 if (EOFBlob(image) != MagickFalse)
170 if ((count <= 0) || (count >= 128))
172 byte=(unsigned char) (~ReadBlobByte(image));
179 if (offset >= (ssize_t) length)
181 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
182 if (q == (Quantum *) NULL)
187 for (x=0; x < (ssize_t) image->columns; x++)
191 SetPixelIndex(image,((byte & 0x80) != 0 ? 0x01 : 0x00),q);
196 q+=GetPixelChannels(image);
198 if (SyncAuthenticPixels(image,exception) == MagickFalse)
210 byte=(unsigned char) (~ReadBlobByte(image));
214 if (offset >= (ssize_t) length)
216 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
217 if (q == (Quantum *) NULL)
222 for (x=0; x < (ssize_t) image->columns; x++)
226 SetPixelIndex(image,((byte & 0x80) != 0 ? 0x01 : 0x00),q);
231 q+=GetPixelChannels(image);
233 if (SyncAuthenticPixels(image,exception) == MagickFalse)
241 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
242 (void) CloseBlob(image);
243 return(GetFirstImageInList(image));
247 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
251 % R e g i s t e r M A C I m a g e %
255 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
257 % RegisterMACImage() adds attributes for the MAC X image format to the list
258 % of supported formats. The attributes include the image format tag, a
259 % method to read and/or write the format, whether the format supports the
260 % saving of more than one frame to the same file or blob, whether the format
261 % supports native in-memory I/O, and a brief description of the format.
263 % The format of the RegisterMACImage method is:
265 % size_t RegisterMACImage(void)
268 ModuleExport size_t RegisterMACImage(void)
273 entry=SetMagickInfo("MAC");
274 entry->decoder=(DecodeImageHandler *) ReadMACImage;
275 entry->description=ConstantString("MAC Paint");
276 entry->module=ConstantString("MAC");
277 (void) RegisterMagickInfo(entry);
278 return(MagickImageCoderSignature);
282 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
286 % U n r e g i s t e r M A C I m a g e %
290 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
292 % UnregisterMACImage() removes format registrations made by the
293 % MAC module from the list of supported formats.
295 % The format of the UnregisterMACImage method is:
297 % UnregisterMACImage(void)
300 ModuleExport void UnregisterMACImage(void)
302 (void) UnregisterMagickInfo("MAC");