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cristy3ed852e2009-09-05 21:47:34 +00001/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% PPPP IIIII X X %
7% P P I X X %
8% PPPP I X %
9% P I X X %
10% P IIIII X X %
11% %
12% %
13% Read Alias/Wavefront RLE Image Format %
14% %
15% Software Design %
16% John Cristy %
17% July 1992 %
18% %
19% %
cristy45ef08f2012-12-07 13:13:34 +000020% Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
cristy3ed852e2009-09-05 21:47:34 +000021% 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/*
40 Include declarations.
41*/
cristy4c08aed2011-07-01 19:47:50 +000042#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"
cristy3ed852e2009-09-05 21:47:34 +000061
62/*
63%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
64% %
65% %
66% %
67% R e a d P I X I m a g e %
68% %
69% %
70% %
71%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72%
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.
76%
77% The format of the ReadPIXImage method is:
78%
79% Image *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
80%
81% A description of each parameter follows:
82%
83% o image_info: the image info.
84%
85% o exception: return any errors or warnings in this structure.
86%
87%
88*/
89static Image *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
90{
91 Image
92 *image;
93
cristy3ed852e2009-09-05 21:47:34 +000094 MagickBooleanType
95 status;
96
97 Quantum
98 blue,
99 green,
cristy4c08aed2011-07-01 19:47:50 +0000100 index,
cristy3ed852e2009-09-05 21:47:34 +0000101 red;
102
cristybb503372010-05-27 20:51:26 +0000103 register ssize_t
cristy3ed852e2009-09-05 21:47:34 +0000104 x;
105
cristy4c08aed2011-07-01 19:47:50 +0000106 register Quantum
cristy3ed852e2009-09-05 21:47:34 +0000107 *q;
108
109 size_t
cristy3ed852e2009-09-05 21:47:34 +0000110 bits_per_pixel,
111 height,
cristyaff6d802011-04-26 01:46:31 +0000112 length,
cristy3ed852e2009-09-05 21:47:34 +0000113 width;
114
cristyaff6d802011-04-26 01:46:31 +0000115 ssize_t
116 y;
117
cristy3ed852e2009-09-05 21:47:34 +0000118 /*
119 Open image file.
120 */
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);
cristy9950d572011-10-01 18:22:35 +0000128 image=AcquireImage(image_info,exception);
cristy3ed852e2009-09-05 21:47:34 +0000129 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
130 if (status == MagickFalse)
131 {
132 image=DestroyImageList(image);
133 return((Image *) NULL);
134 }
135 /*
136 Read PIX image.
137 */
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");
146 do
147 {
148 /*
149 Initialize image structure.
150 */
151 image->columns=width;
152 image->rows=height;
153 if (bits_per_pixel == 8)
cristy018f07f2011-09-04 21:15:19 +0000154 if (AcquireImageColormap(image,256,exception) == MagickFalse)
cristy3ed852e2009-09-05 21:47:34 +0000155 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))
158 break;
159 /*
160 Convert PIX raster image to pixel packets.
161 */
162 red=(Quantum) 0;
163 green=(Quantum) 0;
164 blue=(Quantum) 0;
cristy4c08aed2011-07-01 19:47:50 +0000165 index=0;
cristy3ed852e2009-09-05 21:47:34 +0000166 length=0;
cristybb503372010-05-27 20:51:26 +0000167 for (y=0; y < (ssize_t) image->rows; y++)
cristy3ed852e2009-09-05 21:47:34 +0000168 {
169 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
cristyacd2ed22011-08-30 01:44:23 +0000170 if (q == (Quantum *) NULL)
cristy3ed852e2009-09-05 21:47:34 +0000171 break;
cristybb503372010-05-27 20:51:26 +0000172 for (x=0; x < (ssize_t) image->columns; x++)
cristy3ed852e2009-09-05 21:47:34 +0000173 {
174 if (length == 0)
175 {
176 length=(size_t) ReadBlobByte(image);
177 if (bits_per_pixel == 8)
178 index=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
179 else
180 {
181 blue=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
182 green=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
183 red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
184 }
185 }
186 if (image->storage_class == PseudoClass)
cristy4c08aed2011-07-01 19:47:50 +0000187 SetPixelIndex(image,index,q);
188 SetPixelBlue(image,blue,q);
189 SetPixelGreen(image,green,q);
190 SetPixelRed(image,red,q);
cristy3ed852e2009-09-05 21:47:34 +0000191 length--;
cristyed231572011-07-14 02:18:59 +0000192 q+=GetPixelChannels(image);
cristy3ed852e2009-09-05 21:47:34 +0000193 }
194 if (SyncAuthenticPixels(image,exception) == MagickFalse)
195 break;
196 if (image->previous == (Image *) NULL)
197 {
cristycee97112010-05-28 00:44:52 +0000198 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
cristyaff6d802011-04-26 01:46:31 +0000199 image->rows);
cristy3ed852e2009-09-05 21:47:34 +0000200 if (status == MagickFalse)
201 break;
202 }
203 }
204 if (image->storage_class == PseudoClass)
cristyea1a8aa2011-10-20 13:24:06 +0000205 (void) SyncImage(image,exception);
cristy3ed852e2009-09-05 21:47:34 +0000206 if (EOFBlob(image) != MagickFalse)
207 {
208 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
209 image->filename);
210 break;
211 }
212 /*
213 Proceed to next image.
214 */
215 if (image_info->number_scenes != 0)
216 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
217 break;
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)
226 {
227 /*
228 Allocate next image structure.
229 */
cristy9950d572011-10-01 18:22:35 +0000230 AcquireNextImage(image_info,image,exception);
cristy3ed852e2009-09-05 21:47:34 +0000231 if (GetNextImageInList(image) == (Image *) NULL)
232 {
233 image=DestroyImageList(image);
234 return((Image *) NULL);
235 }
236 image=SyncNextImageInList(image);
237 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
238 GetBlobSize(image));
239 if (status == MagickFalse)
240 break;
241 }
242 } while (status == MagickTrue);
243 (void) CloseBlob(image);
244 return(GetFirstImageInList(image));
245}
246
247/*
248%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
249% %
250% %
251% %
252% R e g i s t e r P I X I m a g e %
253% %
254% %
255% %
256%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
257%
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.
264%
265% The format of the RegisterPIXImage method is:
266%
cristybb503372010-05-27 20:51:26 +0000267% size_t RegisterPIXImage(void)
cristy3ed852e2009-09-05 21:47:34 +0000268%
269*/
cristybb503372010-05-27 20:51:26 +0000270ModuleExport size_t RegisterPIXImage(void)
cristy3ed852e2009-09-05 21:47:34 +0000271{
272 MagickInfo
273 *entry;
274
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);
281}
282
283/*
284%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
285% %
286% %
287% %
288% U n r e g i s t e r P I X I m a g e %
289% %
290% %
291% %
292%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
293%
294% UnregisterPIXImage() removes format registrations made by the
295% PIX module from the list of supported formats.
296%
297% The format of the UnregisterPIXImage method is:
298%
299% UnregisterPIXImage(void)
300%
301*/
302ModuleExport void UnregisterPIXImage(void)
303{
304 (void) UnregisterMagickInfo("PIX");
305}