granicus.if.org Git - imagemagick/blob - coders/inline.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                  IIIII  N   N  L      IIIII  N   N  EEEEE                   %
   7 %                    I    NN  N  L        I    NN  N  E                       %
   8 %                    I    N N N  L        I    N N N  EEE                     %
   9 %                    I    N  NN  L        I    N  NN  E                       %
  10 %                  IIIII  N   N  LLLLL  IIIII  N   N  EEEEE                   %
  11 %                                                                             %
  12 %                                                                             %
  13 %                            Read Inline Images                               %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2018 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 %    https://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 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "MagickCore/studio.h"
  43 #include "MagickCore/blob.h"
  44 #include "MagickCore/blob-private.h"
  45 #include "MagickCore/client.h"
  46 #include "MagickCore/constitute.h"
  47 #include "MagickCore/display.h"
  48 #include "MagickCore/exception.h"
  49 #include "MagickCore/exception-private.h"
  50 #include "MagickCore/image.h"
  51 #include "MagickCore/image-private.h"
  52 #include "MagickCore/list.h"
  53 #include "MagickCore/magick.h"
  54 #include "MagickCore/memory_.h"
  55 #include "MagickCore/option.h"
  56 #include "MagickCore/quantum-private.h"
  57 #include "MagickCore/static.h"
  58 #include "MagickCore/string_.h"
  59 #include "MagickCore/module.h"
  60 #include "MagickCore/utility.h"
  61 #include "MagickCore/xwindow.h"
  62 #include "MagickCore/xwindow-private.h"
  63 \f
  64 /*
  65   Forward declarations.
  66 */
  67 static MagickBooleanType
  68   WriteINLINEImage(const ImageInfo *,Image *,ExceptionInfo *);
  69 \f
  70 /*
  71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  72 %                                                                             %
  73 %                                                                             %
  74 %                                                                             %
  75 %   R e a d I N L I N E I m a g e                                             %
  76 %                                                                             %
  77 %                                                                             %
  78 %                                                                             %
  79 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  80 %
  81 %  ReadINLINEImage() reads base64-encoded inlines images.
  82 %
  83 %  The format of the ReadINLINEImage method is:
  84 %
  85 %      Image *ReadINLINEImage(const ImageInfo *image_info,
  86 %        ExceptionInfo *exception)
  87 %
  88 %  A description of each parameter follows:
  89 %
  90 %    o image_info: the image info.
  91 %
  92 %    o exception: return any errors or warnings in this structure.
  93 %
  94 */
  95 static Image *ReadINLINEImage(const ImageInfo *image_info,
  96   ExceptionInfo *exception)
  97 {
  98   Image
  99     *image;
 100
 101   MagickBooleanType
 102     status;
 103
 104   register size_t
 105     i;
 106
 107   size_t
 108     quantum;
 109
 110   ssize_t
 111     count;
 112
 113   unsigned char
 114     *inline_image;
 115
 116   /*
 117     Open image file.
 118   */
 119   assert(image_info != (const ImageInfo *) NULL);
 120   assert(image_info->signature == MagickCoreSignature);
 121   if (image_info->debug != MagickFalse)
 122     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 123       image_info->filename);
 124   assert(exception != (ExceptionInfo *) NULL);
 125   assert(exception->signature == MagickCoreSignature);
 126   if (LocaleNCompare(image_info->filename,"data:",5) == 0)
 127     {
 128       char
 129         *filename;
 130
 131       Image
 132         *data_image;
 133
 134       filename=AcquireString("data:");
 135       (void) ConcatenateMagickString(filename,image_info->filename,
 136         MagickPathExtent);
 137       data_image=ReadInlineImage(image_info,filename,exception);
 138       filename=DestroyString(filename);
 139       return(data_image);
 140     }
 141   image=AcquireImage(image_info,exception);
 142   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 143   if (status == MagickFalse)
 144     {
 145       image=DestroyImageList(image);
 146       return((Image *) NULL);
 147     }
 148   quantum=MagickMin((size_t) GetBlobSize(image),MagickMaxBufferExtent);
 149   if (quantum == 0)
 150     quantum=MagickMaxBufferExtent;
 151   inline_image=(unsigned char *) AcquireQuantumMemory(quantum,
 152     sizeof(*inline_image));
 153   count=0;
 154   for (i=0; inline_image != (unsigned char *) NULL; i+=count)
 155   {
 156     count=(ssize_t) ReadBlob(image,quantum,inline_image+i);
 157     if (count <= 0)
 158       {
 159         count=0;
 160         if (errno != EINTR)
 161           break;
 162       }
 163     if (~((size_t) i) < (quantum+1))
 164       {
 165         inline_image=(unsigned char *) RelinquishMagickMemory(inline_image);
 166         break;
 167       }
 168     inline_image=(unsigned char *) ResizeQuantumMemory(inline_image,i+count+
 169       quantum+1,sizeof(*inline_image));
 170   }
 171   if (inline_image == (unsigned char *) NULL)
 172     {
 173       (void) ThrowMagickException(exception,GetMagickModule(),
 174         ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
 175       return((Image *) NULL);
 176     }
 177   inline_image[i+count]='\0';
 178   image=DestroyImageList(image);
 179   image=ReadInlineImage(image_info,(char *) inline_image,exception);
 180   inline_image=(unsigned char *) RelinquishMagickMemory(inline_image);
 181   return(image);
 182 }
 183 \f
 184 /*
 185 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 186 %                                                                             %
 187 %                                                                             %
 188 %                                                                             %
 189 %   R e g i s t e r I N L I N E I m a g e                                     %
 190 %                                                                             %
 191 %                                                                             %
 192 %                                                                             %
 193 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 194 %
 195 %  RegisterINLINEImage() adds attributes for the INLINE image format to
 196 %  the list of supported formats.  The attributes include the image format
 197 %  tag, a method to read and/or write the format, whether the format
 198 %  supports the saving of more than one frame to the same file or blob,
 199 %  whether the format supports native in-memory I/O, and a brief
 200 %  description of the format.
 201 %
 202 %  The format of the RegisterINLINEImage method is:
 203 %
 204 %      size_t RegisterINLINEImage(void)
 205 %
 206 */
 207 ModuleExport size_t RegisterINLINEImage(void)
 208 {
 209   MagickInfo
 210     *entry;
 211
 212   entry=AcquireMagickInfo("DATA","INLINE","Base64-encoded inline images");
 213   entry->decoder=(DecodeImageHandler *) ReadINLINEImage;
 214   entry->encoder=(EncodeImageHandler *) WriteINLINEImage;
 215   entry->format_type=ImplicitFormatType;
 216   (void) RegisterMagickInfo(entry);
 217   entry=AcquireMagickInfo("INLINE","INLINE","Base64-encoded inline images");
 218   entry->decoder=(DecodeImageHandler *) ReadINLINEImage;
 219   entry->encoder=(EncodeImageHandler *) WriteINLINEImage;
 220   entry->format_type=ImplicitFormatType;
 221   (void) RegisterMagickInfo(entry);
 222   return(MagickImageCoderSignature);
 223 }
 224 \f
 225 /*
 226 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 227 %                                                                             %
 228 %                                                                             %
 229 %                                                                             %
 230 %   U n r e g i s t e r I N L I N E I m a g e                                 %
 231 %                                                                             %
 232 %                                                                             %
 233 %                                                                             %
 234 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 235 %
 236 %  UnregisterINLINEImage() removes format registrations made by the
 237 %  INLINE module from the list of supported formats.
 238 %
 239 %  The format of the UnregisterINLINEImage method is:
 240 %
 241 %      UnregisterINLINEImage(void)
 242 %
 243 */
 244 ModuleExport void UnregisterINLINEImage(void)
 245 {
 246   (void) UnregisterMagickInfo("INLINE");
 247   (void) UnregisterMagickInfo("DATA");
 248 }
 249 \f
 250 /*
 251 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 252 %                                                                             %
 253 %                                                                             %
 254 %                                                                             %
 255 %   W r i t e I N L I N E I m a g e                                           %
 256 %                                                                             %
 257 %                                                                             %
 258 %                                                                             %
 259 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 260 %
 261 %  WriteINLINEImage() writes an image to a file in INLINE format (Base64).
 262 %
 263 %  The format of the WriteINLINEImage method is:
 264 %
 265 %      MagickBooleanType WriteINLINEImage(const ImageInfo *image_info,
 266 %        Image *image,ExceptionInfo *exception)
 267 %
 268 %  A description of each parameter follows.
 269 %
 270 %    o image_info: the image info.
 271 %
 272 %    o image:  The image.
 273 %
 274 %    o exception: return any errors or warnings in this structure.
 275 %
 276 */
 277 static MagickBooleanType WriteINLINEImage(const ImageInfo *image_info,
 278   Image *image,ExceptionInfo *exception)
 279 {
 280   char
 281     *base64,
 282     message[MagickPathExtent];
 283
 284   const MagickInfo
 285     *magick_info;
 286
 287   Image
 288     *write_image;
 289
 290   ImageInfo
 291     *write_info;
 292
 293   MagickBooleanType
 294     status;
 295
 296   size_t
 297     blob_length,
 298     encode_length;
 299
 300   unsigned char
 301     *blob;
 302
 303   /*
 304     Convert image to base64-encoding.
 305   */
 306   assert(image_info != (const ImageInfo *) NULL);
 307   assert(image_info->signature == MagickCoreSignature);
 308   assert(image != (Image *) NULL);
 309   assert(image->signature == MagickCoreSignature);
 310   if (image->debug != MagickFalse)
 311     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 312   write_info=CloneImageInfo(image_info);
 313   (void) SetImageInfo(write_info,1,exception);
 314   if (LocaleCompare(write_info->magick,"INLINE") == 0)
 315     (void) CopyMagickString(write_info->magick,image->magick,MagickPathExtent);
 316   magick_info=GetMagickInfo(write_info->magick,exception);
 317   if ((magick_info == (const MagickInfo *) NULL) ||
 318       (GetMagickMimeType(magick_info) == (const char *) NULL))
 319     {
 320       write_info=DestroyImageInfo(write_info);
 321       ThrowWriterException(CorruptImageError,"ImageTypeNotSupported");
 322     }
 323   (void) CopyMagickString(image->filename,write_info->filename,
 324     MagickPathExtent);
 325   blob_length=2048;
 326   write_image=CloneImage(image,0,0,MagickTrue,exception);
 327   if (write_image == (Image *) NULL)
 328     {
 329       write_info=DestroyImageInfo(write_info);
 330       return(MagickTrue);
 331     }
 332   blob=(unsigned char *) ImageToBlob(write_info,write_image,&blob_length,
 333     exception);
 334   write_image=DestroyImage(write_image);
 335   write_info=DestroyImageInfo(write_info);
 336   if (blob == (unsigned char *) NULL)
 337     return(MagickFalse);
 338   encode_length=0;
 339   base64=Base64Encode(blob,blob_length,&encode_length);
 340   blob=(unsigned char *) RelinquishMagickMemory(blob);
 341   if (base64 == (char *) NULL)
 342     ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 343   /*
 344     Write base64-encoded image.
 345   */
 346   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 347   if (status == MagickFalse)
 348     {
 349       base64=DestroyString(base64);
 350       return(status);
 351     }
 352   (void) FormatLocaleString(message,MagickPathExtent,"data:%s;base64,",
 353     GetMagickMimeType(magick_info));
 354   (void) WriteBlobString(image,message);
 355   (void) WriteBlobString(image,base64);
 356   base64=DestroyString(base64);
 357   return(MagickTrue);
 358 }