1 /* 2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 3 % % 4 % % 5 % % 6 % M M OOO N N OOO % 7 % MM MM O O NN N O O % 8 % M M M O O N N N O O % 9 % M M O O N NN O O % 10 % M M OOO N N OOO % 11 % % 12 % % 13 % Read/Write Raw Bi-Level Bitmap Format % 14 % % 15 % Software Design % 16 % Cristy % 17 % July 1992 % 18 % % 19 % % 20 % Copyright 1999-2016 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 % http://www.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 /* 41 Include declarations. 42 */ 43 #include "MagickCore/studio.h" 44 #include "MagickCore/attribute.h" 45 #include "MagickCore/blob.h" 46 #include "MagickCore/blob-private.h" 47 #include "MagickCore/cache.h" 48 #include "MagickCore/color-private.h" 49 #include "MagickCore/colormap.h" 50 #include "MagickCore/colorspace.h" 51 #include "MagickCore/colorspace-private.h" 52 #include "MagickCore/exception.h" 53 #include "MagickCore/exception-private.h" 54 #include "MagickCore/image.h" 55 #include "MagickCore/image-private.h" 56 #include "MagickCore/list.h" 57 #include "MagickCore/magick.h" 58 #include "MagickCore/memory_.h" 59 #include "MagickCore/monitor.h" 60 #include "MagickCore/monitor-private.h" 61 #include "MagickCore/pixel-accessor.h" 62 #include "MagickCore/quantum-private.h" 63 #include "MagickCore/static.h" 64 #include "MagickCore/string_.h" 65 #include "MagickCore/module.h" 66 67 /* 69 Forward declarations. 70 */ 71 static MagickBooleanType 72 WriteMONOImage(const ImageInfo *,Image *,ExceptionInfo *); 73 74 /* 76 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 77 % % 78 % % 79 % % 80 % R e a d M O N O I m a g e % 81 % % 82 % % 83 % % 84 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 85 % 86 % ReadMONOImage() reads an image of raw bites in LSB order and returns 87 % it. It allocates the memory necessary for the new Image structure and 88 % returns a pointer to the new image. 89 % 90 % The format of the ReadMONOImage method is: 91 % 92 % Image *ReadMONOImage(const ImageInfo *image_info, 93 % ExceptionInfo *exception) 94 % 95 % A description of each parameter follows: 96 % 97 % o image_info: the image info. 98 % 99 % o exception: return any errors or warnings in this structure. 100 % 101 */ 102 static Image *ReadMONOImage(const ImageInfo *image_info, 103 ExceptionInfo *exception) 104 { 105 Image 106 *image; 107 108 MagickBooleanType 109 status; 110 111 register Quantum 112 *q; 113 114 register ssize_t 115 x; 116 117 size_t 118 bit, 119 byte; 120 121 ssize_t 122 y; 123 124 /* 125 Open image file. 126 */ 127 assert(image_info != (const ImageInfo *) NULL); 128 assert(image_info->signature == MagickCoreSignature); 129 if (image_info->debug != MagickFalse) 130 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", 131 image_info->filename); 132 assert(exception != (ExceptionInfo *) NULL); 133 assert(exception->signature == MagickCoreSignature); 134 image=AcquireImage(image_info,exception); 135 if ((image->columns == 0) || (image->rows == 0)) 136 ThrowReaderException(OptionError,"MustSpecifyImageSize"); 137 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); 138 if (status == MagickFalse) 139 { 140 image=DestroyImageList(image); 141 return((Image *) NULL); 142 } 143 if (DiscardBlobBytes(image,image->offset) == MagickFalse) 144 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", 145 image->filename); 146 /* 147 Initialize image colormap. 148 */ 149 image->depth=1; 150 if (AcquireImageColormap(image,2,exception) == MagickFalse) 151 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 152 if (image_info->ping != MagickFalse) 153 { 154 (void) CloseBlob(image); 155 return(GetFirstImageInList(image)); 156 } 157 status=SetImageExtent(image,image->columns,image->rows,exception); 158 if (status == MagickFalse) 159 return(DestroyImageList(image)); 160 /* 161 Convert bi-level image to pixel packets. 162 */ 163 for (y=0; y < (ssize_t) image->rows; y++) 164 { 165 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); 166 if (q == (Quantum *) NULL) 167 break; 168 bit=0; 169 byte=0; 170 for (x=0; x < (ssize_t) image->columns; x++) 171 { 172 if (bit == 0) 173 byte=(size_t) ReadBlobByte(image); 174 if (image_info->endian == LSBEndian) 175 SetPixelIndex(image,((byte & 0x01) != 0) ? 0x00 : 0x01,q); 176 else 177 SetPixelIndex(image,((byte & 0x01) != 0) ? 0x01 : 0x00,q); 178 bit++; 179 if (bit == 8) 180 bit=0; 181 byte>>=1; 182 q+=GetPixelChannels(image); 183 } 184 if (SyncAuthenticPixels(image,exception) == MagickFalse) 185 break; 186 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y, 187 image->rows); 188 if (status == MagickFalse) 189 break; 190 } 191 (void) SyncImage(image,exception); 192 if (EOFBlob(image) != MagickFalse) 193 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", 194 image->filename); 195 (void) CloseBlob(image); 196 return(GetFirstImageInList(image)); 197 } 198 199 /* 201 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 202 % % 203 % % 204 % % 205 % R e g i s t e r M O N O I m a g e % 206 % % 207 % % 208 % % 209 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 210 % 211 % RegisterMONOImage() adds attributes for the MONO image format to 212 % the list of supported formats. The attributes include the image format 213 % tag, a method to read and/or write the format, whether the format 214 % supports the saving of more than one frame to the same file or blob, 215 % whether the format supports native in-memory I/O, and a brief 216 % description of the format. 217 % 218 % The format of the RegisterMONOImage method is: 219 % 220 % size_t RegisterMONOImage(void) 221 % 222 */ 223 ModuleExport size_t RegisterMONOImage(void) 224 { 225 MagickInfo 226 *entry; 227 228 entry=AcquireMagickInfo("MONO","MONO","Raw bi-level bitmap"); 229 entry->decoder=(DecodeImageHandler *) ReadMONOImage; 230 entry->encoder=(EncodeImageHandler *) WriteMONOImage; 231 entry->flags|=CoderRawSupportFlag; 232 entry->flags|=CoderEndianSupportFlag; 233 entry->flags^=CoderAdjoinFlag; 234 (void) RegisterMagickInfo(entry); 235 return(MagickImageCoderSignature); 236 } 237 238 /* 240 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 241 % % 242 % % 243 % % 244 % U n r e g i s t e r M O N O I m a g e % 245 % % 246 % % 247 % % 248 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 249 % 250 % UnregisterMONOImage() removes format registrations made by the 251 % MONO module from the list of supported formats. 252 % 253 % The format of the UnregisterMONOImage method is: 254 % 255 % UnregisterMONOImage(void) 256 % 257 */ 258 ModuleExport void UnregisterMONOImage(void) 259 { 260 (void) UnregisterMagickInfo("MONO"); 261 } 262 263 /* 265 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 266 % % 267 % % 268 % % 269 % W r i t e M O N O I m a g e % 270 % % 271 % % 272 % % 273 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 274 % 275 % WriteMONOImage() writes an image of raw bits in LSB order to a file. 276 % 277 % The format of the WriteMONOImage method is: 278 % 279 % MagickBooleanType WriteMONOImage(const ImageInfo *image_info, 280 % Image *image,ExceptionInfo *exception) 281 % 282 % A description of each parameter follows. 283 % 284 % o image_info: the image info. 285 % 286 % o image: The image. 287 % 288 % o exception: return any errors or warnings in this structure. 289 % 290 */ 291 static MagickBooleanType WriteMONOImage(const ImageInfo *image_info, 292 Image *image,ExceptionInfo *exception) 293 { 294 MagickBooleanType 295 status; 296 297 register const Quantum 298 *p; 299 300 register ssize_t 301 x; 302 303 size_t 304 bit, 305 byte; 306 307 ssize_t 308 y; 309 310 /* 311 Open output image file. 312 */ 313 assert(image_info != (const ImageInfo *) NULL); 314 assert(image_info->signature == MagickCoreSignature); 315 assert(image != (Image *) NULL); 316 assert(image->signature == MagickCoreSignature); 317 if (image->debug != MagickFalse) 318 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); 319 assert(exception != (ExceptionInfo *) NULL); 320 assert(exception->signature == MagickCoreSignature); 321 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); 322 if (status == MagickFalse) 323 return(status); 324 (void) TransformImageColorspace(image,sRGBColorspace,exception); 325 /* 326 Convert image to a bi-level image. 327 */ 328 (void) SetImageType(image,BilevelType,exception); 329 for (y=0; y < (ssize_t) image->rows; y++) 330 { 331 p=GetVirtualPixels(image,0,y,image->columns,1,exception); 332 if (p == (const Quantum *) NULL) 333 break; 334 bit=0; 335 byte=0; 336 for (x=0; x < (ssize_t) image->columns; x++) 337 { 338 byte>>=1; 339 if (image->endian == LSBEndian) 340 { 341 if (GetPixelLuma(image,p) < (QuantumRange/2.0)) 342 byte|=0x80; 343 } 344 else 345 if (GetPixelLuma(image,p) >= (QuantumRange/2.0)) 346 byte|=0x80; 347 bit++; 348 if (bit == 8) 349 { 350 (void) WriteBlobByte(image,(unsigned char) byte); 351 bit=0; 352 byte=0; 353 } 354 p+=GetPixelChannels(image); 355 } 356 if (bit != 0) 357 (void) WriteBlobByte(image,(unsigned char) (byte >> (8-bit))); 358 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y, 359 image->rows); 360 if (status == MagickFalse) 361 break; 362 } 363 (void) CloseBlob(image); 364 return(MagickTrue); 365 } 366
