1 /* 2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 3 % % 4 % % 5 % % 6 % H H RRRR ZZZZZ % 7 % H H R R ZZ % 8 % HHHHH RRRR Z % 9 % H H R R ZZ % 10 % H H R R ZZZZZ % 11 % % 12 % % 13 % Read/Write Slow Scan TeleVision Image 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/blob.h" 45 #include "MagickCore/blob-private.h" 46 #include "MagickCore/cache.h" 47 #include "MagickCore/colorspace.h" 48 #include "MagickCore/colorspace-private.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" 63 64 /* 66 Forward declarations. 67 */ 68 static MagickBooleanType 69 WriteHRZImage(const ImageInfo *,Image *,ExceptionInfo *); 70 71 /* 73 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 74 % % 75 % % 76 % % 77 % R e a d H R Z I m a g e % 78 % % 79 % % 80 % % 81 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 82 % 83 % ReadHRZImage() reads a Slow Scan TeleVision image file and returns it. It 84 % allocates the memory necessary for the new Image structure and returns a 85 % pointer to the new image. 86 % 87 % The format of the ReadHRZImage method is: 88 % 89 % Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception) 90 % 91 % A description of each parameter follows: 92 % 93 % o image_info: the image info. 94 % 95 % o exception: return any errors or warnings in this structure. 96 % 97 */ 98 static Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception) 99 { 100 Image 101 *image; 102 103 MagickBooleanType 104 status; 105 106 register ssize_t 107 x; 108 109 register Quantum 110 *q; 111 112 register unsigned char 113 *p; 114 115 ssize_t 116 count, 117 y; 118 119 size_t 120 length; 121 122 unsigned char 123 *pixels; 124 125 /* 126 Open image file. 127 */ 128 assert(image_info != (const ImageInfo *) NULL); 129 assert(image_info->signature == MagickCoreSignature); 130 if (image_info->debug != MagickFalse) 131 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", 132 image_info->filename); 133 assert(exception != (ExceptionInfo *) NULL); 134 assert(exception->signature == MagickCoreSignature); 135 image=AcquireImage(image_info,exception); 136 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); 137 if (status == MagickFalse) 138 { 139 image=DestroyImageList(image); 140 return((Image *) NULL); 141 } 142 /* 143 Convert HRZ raster image to pixel packets. 144 */ 145 image->columns=256; 146 image->rows=240; 147 image->depth=8; 148 status=SetImageExtent(image,image->columns,image->rows,exception); 149 if (status == MagickFalse) 150 return(DestroyImageList(image)); 151 pixels=(unsigned char *) AcquireQuantumMemory(image->columns,3* 152 sizeof(*pixels)); 153 if (pixels == (unsigned char *) NULL) 154 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); 155 length=(size_t) (3*image->columns); 156 for (y=0; y < (ssize_t) image->rows; y++) 157 { 158 count=ReadBlob(image,length,pixels); 159 if ((size_t) count != length) 160 ThrowReaderException(CorruptImageError,"UnableToReadImageData"); 161 p=pixels; 162 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); 163 if (q == (Quantum *) NULL) 164 break; 165 for (x=0; x < (ssize_t) image->columns; x++) 166 { 167 SetPixelRed(image,ScaleCharToQuantum(4**p++),q); 168 SetPixelGreen(image,ScaleCharToQuantum(4**p++),q); 169 SetPixelBlue(image,ScaleCharToQuantum(4**p++),q); 170 SetPixelAlpha(image,OpaqueAlpha,q); 171 q+=GetPixelChannels(image); 172 } 173 if (SyncAuthenticPixels(image,exception) == MagickFalse) 174 break; 175 if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse) 176 break; 177 } 178 pixels=(unsigned char *) RelinquishMagickMemory(pixels); 179 if (EOFBlob(image) != MagickFalse) 180 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", 181 image->filename); 182 (void) CloseBlob(image); 183 return(GetFirstImageInList(image)); 184 } 185 186 /* 188 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 189 % % 190 % % 191 % % 192 % R e g i s t e r H R Z I m a g e % 193 % % 194 % % 195 % % 196 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 197 % 198 % RegisterHRZImage() adds attributes for the HRZ X image format to the list 199 % of supported formats. The attributes include the image format tag, a 200 % method to read and/or write the format, whether the format supports the 201 % saving of more than one frame to the same file or blob, whether the format 202 % supports native in-memory I/O, and a brief description of the format. 203 % 204 % The format of the RegisterHRZImage method is: 205 % 206 % size_t RegisterHRZImage(void) 207 % 208 */ 209 ModuleExport size_t RegisterHRZImage(void) 210 { 211 MagickInfo 212 *entry; 213 214 entry=AcquireMagickInfo("HRZ","HRZ","Slow Scan TeleVision"); 215 entry->decoder=(DecodeImageHandler *) ReadHRZImage; 216 entry->encoder=(EncodeImageHandler *) WriteHRZImage; 217 entry->flags^=CoderAdjoinFlag; 218 (void) RegisterMagickInfo(entry); 219 return(MagickImageCoderSignature); 220 } 221 222 /* 224 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 225 % % 226 % % 227 % % 228 % U n r e g i s t e r H R Z I m a g e % 229 % % 230 % % 231 % % 232 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 233 % 234 % UnregisterHRZImage() removes format registrations made by the 235 % HRZ module from the list of supported formats. 236 % 237 % The format of the UnregisterHRZImage method is: 238 % 239 % UnregisterHRZImage(void) 240 % 241 */ 242 ModuleExport void UnregisterHRZImage(void) 243 { 244 (void) UnregisterMagickInfo("HRZ"); 245 } 246 247 /* 249 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 250 % % 251 % % 252 % % 253 % W r i t e H R Z I m a g e % 254 % % 255 % % 256 % % 257 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 258 % 259 % WriteHRZImage() writes an image to a file in HRZ X image format. 260 % 261 % The format of the WriteHRZImage method is: 262 % 263 % MagickBooleanType WriteHRZImage(const ImageInfo *image_info, 264 % Image *image,ExceptionInfo *exception) 265 % 266 % A description of each parameter follows. 267 % 268 % o image_info: the image info. 269 % 270 % o image: The image. 271 % 272 % o exception: return any errors or warnings in this structure. 273 % 274 */ 275 static MagickBooleanType WriteHRZImage(const ImageInfo *image_info,Image *image, 276 ExceptionInfo *exception) 277 { 278 Image 279 *hrz_image; 280 281 MagickBooleanType 282 status; 283 284 register const Quantum 285 *p; 286 287 register ssize_t 288 x, 289 y; 290 291 register unsigned char 292 *q; 293 294 ssize_t 295 count; 296 297 unsigned char 298 *pixels; 299 300 /* 301 Open output image file. 302 */ 303 assert(image_info != (const ImageInfo *) NULL); 304 assert(image_info->signature == MagickCoreSignature); 305 assert(image != (Image *) NULL); 306 assert(image->signature == MagickCoreSignature); 307 if (image->debug != MagickFalse) 308 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); 309 assert(exception != (ExceptionInfo *) NULL); 310 assert(exception->signature == MagickCoreSignature); 311 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception); 312 if (status == MagickFalse) 313 return(status); 314 hrz_image=ResizeImage(image,256,240,image->filter,exception); 315 if (hrz_image == (Image *) NULL) 316 return(MagickFalse); 317 (void) TransformImageColorspace(hrz_image,sRGBColorspace,exception); 318 /* 319 Allocate memory for pixels. 320 */ 321 pixels=(unsigned char *) AcquireQuantumMemory((size_t) hrz_image->columns, 322 3*sizeof(*pixels)); 323 if (pixels == (unsigned char *) NULL) 324 { 325 hrz_image=DestroyImage(hrz_image); 326 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); 327 } 328 /* 329 Convert MIFF to HRZ raster pixels. 330 */ 331 for (y=0; y < (ssize_t) hrz_image->rows; y++) 332 { 333 p=GetVirtualPixels(hrz_image,0,y,hrz_image->columns,1,exception); 334 if (p == (const Quantum *) NULL) 335 break; 336 q=pixels; 337 for (x=0; x < (ssize_t) hrz_image->columns; x++) 338 { 339 *q++=ScaleQuantumToChar(GetPixelRed(hrz_image,p)/4); 340 *q++=ScaleQuantumToChar(GetPixelGreen(hrz_image,p)/4); 341 *q++=ScaleQuantumToChar(GetPixelBlue(hrz_image,p)/4); 342 p+=GetPixelChannels(hrz_image); 343 } 344 count=WriteBlob(image,(size_t) (q-pixels),pixels); 345 if (count != (ssize_t) (q-pixels)) 346 break; 347 status=SetImageProgress(image,SaveImageTag,y,hrz_image->rows); 348 if (status == MagickFalse) 349 break; 350 } 351 pixels=(unsigned char *) RelinquishMagickMemory(pixels); 352 hrz_image=DestroyImage(hrz_image); 353 (void) CloseBlob(image); 354 return(MagickTrue); 355 } 356
