cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 1 | /* |
| 2 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 3 | % % |
| 4 | % % |
| 5 | % % |
| 6 | % % |
| 7 | % M M AAA CCCC % |
| 8 | % MM MM A A C % |
| 9 | % M M M AAAAA C % |
| 10 | % M M A A C % |
| 11 | % M M A A CCCC % |
| 12 | % % |
| 13 | % % |
| 14 | % Read MacPaint Image Format % |
| 15 | % % |
| 16 | % Software Design % |
| 17 | % John Cristy % |
| 18 | % July 1992 % |
| 19 | % % |
| 20 | % % |
| 21 | % Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization % |
| 22 | % dedicated to making software imaging solutions freely available. % |
| 23 | % % |
| 24 | % You may not use this file except in compliance with the License. You may % |
| 25 | % obtain a copy of the License at % |
| 26 | % % |
| 27 | % http://www.imagemagick.org/script/license.php % |
| 28 | % % |
| 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. % |
| 34 | % % |
| 35 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 36 | % |
| 37 | % |
| 38 | */ |
| 39 | |
| 40 | /* |
| 41 | Include declarations. |
| 42 | */ |
cristy | 4c08aed | 2011-07-01 19:47:50 +0000 | [diff] [blame] | 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" |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 63 | |
| 64 | /* |
| 65 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 66 | % % |
| 67 | % % |
| 68 | % % |
| 69 | % R e a d M A C I m a g e % |
| 70 | % % |
| 71 | % % |
| 72 | % % |
| 73 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 74 | % |
| 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. |
| 78 | % |
| 79 | % The format of the ReadMACImage method is: |
| 80 | % |
| 81 | % Image *ReadMACImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| 82 | % |
| 83 | % A description of each parameter follows: |
| 84 | % |
| 85 | % o image_info: the image info. |
| 86 | % |
| 87 | % o exception: return any errors or warnings in this structure. |
| 88 | % |
| 89 | */ |
| 90 | static Image *ReadMACImage(const ImageInfo *image_info,ExceptionInfo *exception) |
| 91 | { |
| 92 | Image |
| 93 | *image; |
| 94 | |
| 95 | MagickBooleanType |
| 96 | status; |
| 97 | |
cristy | 4c08aed | 2011-07-01 19:47:50 +0000 | [diff] [blame] | 98 | register Quantum |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 99 | *q; |
| 100 | |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 101 | register ssize_t |
| 102 | x; |
| 103 | |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 104 | register unsigned char |
| 105 | *p; |
| 106 | |
| 107 | size_t |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 108 | length; |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 109 | |
| 110 | ssize_t |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 111 | offset, |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 112 | y; |
| 113 | |
| 114 | unsigned char |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 115 | count, |
| 116 | bit, |
| 117 | byte, |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 118 | *pixels; |
| 119 | |
| 120 | /* |
| 121 | Open image file. |
| 122 | */ |
| 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); |
cristy | 9950d57 | 2011-10-01 18:22:35 +0000 | [diff] [blame^] | 130 | image=AcquireImage(image_info,exception); |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 131 | status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| 132 | if (status == MagickFalse) |
| 133 | { |
| 134 | image=DestroyImageList(image); |
| 135 | return((Image *) NULL); |
| 136 | } |
| 137 | /* |
| 138 | Read MAC X image. |
| 139 | */ |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 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"); |
| 146 | image->columns=576; |
| 147 | image->rows=720; |
| 148 | image->depth=1; |
cristy | 018f07f | 2011-09-04 21:15:19 +0000 | [diff] [blame] | 149 | if (AcquireImageColormap(image,2,exception) == MagickFalse) |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 150 | ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); |
| 151 | if (image_info->ping != MagickFalse) |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 152 | { |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 153 | (void) CloseBlob(image); |
| 154 | return(GetFirstImageInList(image)); |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 155 | } |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 156 | /* |
| 157 | Convert MAC raster image to pixel packets. |
| 158 | */ |
| 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"); |
| 163 | p=pixels; |
| 164 | offset=0; |
| 165 | for (y=0; y < (ssize_t) image->rows; ) |
| 166 | { |
| 167 | count=(unsigned char) ReadBlobByte(image); |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 168 | if (EOFBlob(image) != MagickFalse) |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 169 | break; |
| 170 | if ((count <= 0) || (count >= 128)) |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 171 | { |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 172 | byte=(unsigned char) (~ReadBlobByte(image)); |
| 173 | count=(~count)+2; |
| 174 | while (count != 0) |
| 175 | { |
| 176 | *p++=byte; |
| 177 | offset++; |
| 178 | count--; |
| 179 | if (offset >= (ssize_t) length) |
| 180 | { |
| 181 | q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
cristy | acd2ed2 | 2011-08-30 01:44:23 +0000 | [diff] [blame] | 182 | if (q == (Quantum *) NULL) |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 183 | break; |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 184 | p=pixels; |
| 185 | bit=0; |
| 186 | byte=0; |
| 187 | for (x=0; x < (ssize_t) image->columns; x++) |
| 188 | { |
| 189 | if (bit == 0) |
| 190 | byte=(*p++); |
cristy | 4c08aed | 2011-07-01 19:47:50 +0000 | [diff] [blame] | 191 | SetPixelIndex(image,((byte & 0x80) != 0 ? 0x01 : 0x00),q); |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 192 | bit++; |
| 193 | byte<<=1; |
| 194 | if (bit == 8) |
| 195 | bit=0; |
cristy | ed23157 | 2011-07-14 02:18:59 +0000 | [diff] [blame] | 196 | q+=GetPixelChannels(image); |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 197 | } |
| 198 | if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| 199 | break; |
| 200 | offset=0; |
| 201 | p=pixels; |
| 202 | y++; |
| 203 | } |
| 204 | } |
| 205 | continue; |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 206 | } |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 207 | count++; |
| 208 | while (count != 0) |
| 209 | { |
| 210 | byte=(unsigned char) (~ReadBlobByte(image)); |
| 211 | *p++=byte; |
| 212 | offset++; |
| 213 | count--; |
| 214 | if (offset >= (ssize_t) length) |
| 215 | { |
| 216 | q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
cristy | acd2ed2 | 2011-08-30 01:44:23 +0000 | [diff] [blame] | 217 | if (q == (Quantum *) NULL) |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 218 | break; |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 219 | p=pixels; |
| 220 | bit=0; |
| 221 | byte=0; |
| 222 | for (x=0; x < (ssize_t) image->columns; x++) |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 223 | { |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 224 | if (bit == 0) |
| 225 | byte=(*p++); |
cristy | 4c08aed | 2011-07-01 19:47:50 +0000 | [diff] [blame] | 226 | SetPixelIndex(image,((byte & 0x80) != 0 ? 0x01 : 0x00),q); |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 227 | bit++; |
| 228 | byte<<=1; |
| 229 | if (bit == 8) |
| 230 | bit=0; |
cristy | ed23157 | 2011-07-14 02:18:59 +0000 | [diff] [blame] | 231 | q+=GetPixelChannels(image); |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 232 | } |
cristy | bf1ebd5 | 2010-12-28 18:48:29 +0000 | [diff] [blame] | 233 | if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| 234 | break; |
| 235 | offset=0; |
| 236 | p=pixels; |
| 237 | y++; |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | pixels=(unsigned char *) RelinquishMagickMemory(pixels); |
cristy | ae29c4f | 2010-12-28 14:45:29 +0000 | [diff] [blame] | 242 | (void) CloseBlob(image); |
| 243 | return(GetFirstImageInList(image)); |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 248 | % % |
| 249 | % % |
| 250 | % % |
| 251 | % R e g i s t e r M A C I m a g e % |
| 252 | % % |
| 253 | % % |
| 254 | % % |
| 255 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 256 | % |
| 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. |
| 262 | % |
| 263 | % The format of the RegisterMACImage method is: |
| 264 | % |
| 265 | % size_t RegisterMACImage(void) |
| 266 | % |
| 267 | */ |
| 268 | ModuleExport size_t RegisterMACImage(void) |
| 269 | { |
| 270 | MagickInfo |
| 271 | *entry; |
| 272 | |
| 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); |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 283 | % % |
| 284 | % % |
| 285 | % % |
| 286 | % U n r e g i s t e r M A C I m a g e % |
| 287 | % % |
| 288 | % % |
| 289 | % % |
| 290 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 291 | % |
| 292 | % UnregisterMACImage() removes format registrations made by the |
| 293 | % MAC module from the list of supported formats. |
| 294 | % |
| 295 | % The format of the UnregisterMACImage method is: |
| 296 | % |
| 297 | % UnregisterMACImage(void) |
| 298 | % |
| 299 | */ |
| 300 | ModuleExport void UnregisterMACImage(void) |
| 301 | { |
| 302 | (void) UnregisterMagickInfo("MAC"); |
| 303 | } |