2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read Alias/Wavefront RLE Image Format %
20 % Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
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. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
42 #include "MagickCore/studio.h"
43 #include "MagickCore/blob.h"
44 #include "MagickCore/blob-private.h"
45 #include "MagickCore/cache.h"
46 #include "MagickCore/colormap.h"
47 #include "MagickCore/exception.h"
48 #include "MagickCore/exception-private.h"
49 #include "MagickCore/image.h"
50 #include "MagickCore/image-private.h"
51 #include "MagickCore/list.h"
52 #include "MagickCore/magick.h"
53 #include "MagickCore/memory_.h"
54 #include "MagickCore/monitor.h"
55 #include "MagickCore/monitor-private.h"
56 #include "MagickCore/pixel-accessor.h"
57 #include "MagickCore/quantum-private.h"
58 #include "MagickCore/static.h"
59 #include "MagickCore/string_.h"
60 #include "MagickCore/module.h"
63 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
67 % R e a d P I X I m a g e %
71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
73 % ReadPIXImage() reads a Alias/Wavefront RLE image file and returns it.
74 % It allocates the memory necessary for the new Image structure and returns a
75 % pointer to the new image.
77 % The format of the ReadPIXImage method is:
79 % Image *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
81 % A description of each parameter follows:
83 % o image_info: the image info.
85 % o exception: return any errors or warnings in this structure.
89 static Image *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
121 assert(image_info != (const ImageInfo *) NULL);
122 assert(image_info->signature == MagickSignature);
123 if (image_info->debug != MagickFalse)
124 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
125 image_info->filename);
126 assert(exception != (ExceptionInfo *) NULL);
127 assert(exception->signature == MagickSignature);
128 image=AcquireImage(image_info,exception);
129 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
130 if (status == MagickFalse)
132 image=DestroyImageList(image);
133 return((Image *) NULL);
138 width=ReadBlobMSBShort(image);
139 height=ReadBlobMSBShort(image);
140 (void) ReadBlobMSBShort(image); /* x-offset */
141 (void) ReadBlobMSBShort(image); /* y-offset */
142 bits_per_pixel=ReadBlobMSBShort(image);
143 if ((width == 0UL) || (height == 0UL) || ((bits_per_pixel != 8) &&
144 (bits_per_pixel != 24)))
145 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
149 Initialize image structure.
151 image->columns=width;
153 if (bits_per_pixel == 8)
154 if (AcquireImageColormap(image,256,exception) == MagickFalse)
155 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
156 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
157 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
160 Convert PIX raster image to pixel packets.
167 for (y=0; y < (ssize_t) image->rows; y++)
169 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
170 if (q == (Quantum *) NULL)
172 for (x=0; x < (ssize_t) image->columns; x++)
176 length=(size_t) ReadBlobByte(image);
177 if (bits_per_pixel == 8)
178 index=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
181 blue=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
182 green=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
183 red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
186 if (image->storage_class == PseudoClass)
187 SetPixelIndex(image,index,q);
188 SetPixelBlue(image,blue,q);
189 SetPixelGreen(image,green,q);
190 SetPixelRed(image,red,q);
192 q+=GetPixelChannels(image);
194 if (SyncAuthenticPixels(image,exception) == MagickFalse)
196 if (image->previous == (Image *) NULL)
198 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
200 if (status == MagickFalse)
204 if (image->storage_class == PseudoClass)
205 (void) SyncImage(image,exception);
206 if (EOFBlob(image) != MagickFalse)
208 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
213 Proceed to next image.
215 if (image_info->number_scenes != 0)
216 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
218 width=ReadBlobMSBLong(image);
219 height=ReadBlobMSBLong(image);
220 (void) ReadBlobMSBShort(image);
221 (void) ReadBlobMSBShort(image);
222 bits_per_pixel=ReadBlobMSBShort(image);
223 status=(width != 0UL) && (height == 0UL) && ((bits_per_pixel == 8) ||
224 (bits_per_pixel == 24)) ? MagickTrue : MagickFalse;
225 if (status == MagickTrue)
228 Allocate next image structure.
230 AcquireNextImage(image_info,image,exception);
231 if (GetNextImageInList(image) == (Image *) NULL)
233 image=DestroyImageList(image);
234 return((Image *) NULL);
236 image=SyncNextImageInList(image);
237 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
239 if (status == MagickFalse)
242 } while (status == MagickTrue);
243 (void) CloseBlob(image);
244 return(GetFirstImageInList(image));
248 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
252 % R e g i s t e r P I X I m a g e %
256 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
258 % RegisterPIXImage() adds attributes for the PIX image format to
259 % the list of supported formats. The attributes include the image format
260 % tag, a method to read and/or write the format, whether the format
261 % supports the saving of more than one frame to the same file or blob,
262 % whether the format supports native in-memory I/O, and a brief
263 % description of the format.
265 % The format of the RegisterPIXImage method is:
267 % size_t RegisterPIXImage(void)
270 ModuleExport size_t RegisterPIXImage(void)
275 entry=SetMagickInfo("PIX");
276 entry->decoder=(DecodeImageHandler *) ReadPIXImage;
277 entry->description=ConstantString("Alias/Wavefront RLE image format");
278 entry->module=ConstantString("PIX");
279 (void) RegisterMagickInfo(entry);
280 return(MagickImageCoderSignature);
284 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
288 % U n r e g i s t e r P I X I m a g e %
292 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
294 % UnregisterPIXImage() removes format registrations made by the
295 % PIX module from the list of supported formats.
297 % The format of the UnregisterPIXImage method is:
299 % UnregisterPIXImage(void)
302 ModuleExport void UnregisterPIXImage(void)
304 (void) UnregisterMagickInfo("PIX");