1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3%                                                                             %
4%                                                                             %
5%                                                                             %
6%                            SSSSS   CCCC  TTTTT                              %
7%                            SS     C        T                                %
8%                             SSS   C        T                                %
9%                               SS  C        T                                %
10%                            SSSSS   CCCC    T                                %
11%                                                                             %
12%                                                                             %
13%                    Read Scitex HandShake 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/*
40  Include declarations.
41*/
42#include "MagickCore/studio.h"
43#include "MagickCore/blob.h"
44#include "MagickCore/blob-private.h"
45#include "MagickCore/cache.h"
46#include "MagickCore/exception.h"
47#include "MagickCore/exception-private.h"
48#include "MagickCore/image.h"
49#include "MagickCore/image-private.h"
50#include "MagickCore/list.h"
51#include "MagickCore/magick.h"
52#include "MagickCore/memory_.h"
53#include "MagickCore/module.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/string-private.h"
61
62/*
63%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
64%                                                                             %
65%                                                                             %
66%                                                                             %
67%   I s S C T                                                                 %
68%                                                                             %
69%                                                                             %
70%                                                                             %
71%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72%
73%  IsSCT() returns MagickTrue if the image format type, identified by the
74%  magick string, is SCT.
75%
76%  The format of the IsSCT method is:
77%
78%      MagickBooleanType IsSCT(const unsigned char *magick,const size_t length)
79%
80%  A description of each parameter follows:
81%
82%    o magick: compare image format pattern against these bytes.
83%
84%    o length: Specifies the length of the magick string.
85%
86*/
87static MagickBooleanType IsSCT(const unsigned char *magick,const size_t length)
88{
89  if (length < 2)
90    return(MagickFalse);
91  if (LocaleNCompare((const char *) magick,"CT",2) == 0)
92    return(MagickTrue);
93  return(MagickFalse);
94}
95
96/*
97%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
98%                                                                             %
99%                                                                             %
100%                                                                             %
101%   R e a d S C T I m a g e                                                   %
102%                                                                             %
103%                                                                             %
104%                                                                             %
105%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
106%
107%  ReadSCTImage() reads a Scitex image file and returns it.  It allocates
108%  the memory necessary for the new Image structure and returns a pointer to
109%  the new image.
110%
111%  The format of the ReadSCTImage method is:
112%
113%      Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
114%
115%  A description of each parameter follows:
116%
117%    o image_info: the image info.
118%
119%    o exception: return any errors or warnings in this structure.
120%
121*/
122static Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
123{
124  char
125    magick[2];
126
127  Image
128    *image;
129
130  MagickBooleanType
131    status;
132
133  double
134    height,
135    width;
136
137  Quantum
138    pixel;
139
140  register ssize_t
141    i,
142    x;
143
144  register Quantum
145    *q;
146
147  ssize_t
148    count,
149    y;
150
151  unsigned char
152    buffer[768];
153
154  size_t
155    separations,
156    separations_mask,
157    units;
158
159  /*
160    Open image file.
161  */
162  assert(image_info != (const ImageInfo *) NULL);
163  assert(image_info->signature == MagickCoreSignature);
164  if (image_info->debug != MagickFalse)
165    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
166      image_info->filename);
167  assert(exception != (ExceptionInfo *) NULL);
168  assert(exception->signature == MagickCoreSignature);
169  image=AcquireImage(image_info,exception);
170  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
171  if (status == MagickFalse)
172    {
173      image=DestroyImageList(image);
174      return((Image *) NULL);
175    }
176  /*
177    Read control block.
178  */
179  count=ReadBlob(image,80,buffer);
180  (void) count;
181  count=ReadBlob(image,2,(unsigned char *) magick);
182  if ((LocaleNCompare((char *) magick,"CT",2) != 0) &&
183      (LocaleNCompare((char *) magick,"LW",2) != 0) &&
184      (LocaleNCompare((char *) magick,"BM",2) != 0) &&
185      (LocaleNCompare((char *) magick,"PG",2) != 0) &&
186      (LocaleNCompare((char *) magick,"TX",2) != 0))
187    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
188  if ((LocaleNCompare((char *) magick,"LW",2) == 0) ||
189      (LocaleNCompare((char *) magick,"BM",2) == 0) ||
190      (LocaleNCompare((char *) magick,"PG",2) == 0) ||
191      (LocaleNCompare((char *) magick,"TX",2) == 0))
192    ThrowReaderException(CoderError,"OnlyContinuousTonePictureSupported");
193  count=ReadBlob(image,174,buffer);
194  count=ReadBlob(image,768,buffer);
195  /*
196    Read paramter block.
197  */
198  units=1UL*ReadBlobByte(image);
199  if (units == 0)
200    image->units=PixelsPerCentimeterResolution;
201  separations=1UL*ReadBlobByte(image);
202  separations_mask=ReadBlobMSBShort(image);
203  count=ReadBlob(image,14,buffer);
204  buffer[14]='\0';
205  height=StringToDouble((char *) buffer,(char **) NULL);
206  count=ReadBlob(image,14,buffer);
207  width=StringToDouble((char *) buffer,(char **) NULL);
208  count=ReadBlob(image,12,buffer);
209  buffer[12]='\0';
210  image->rows=StringToUnsignedLong((char *) buffer);
211  count=ReadBlob(image,12,buffer);
212  image->columns=StringToUnsignedLong((char *) buffer);
213  count=ReadBlob(image,200,buffer);
214  count=ReadBlob(image,768,buffer);
215  if (separations_mask == 0x0f)
216    SetImageColorspace(image,CMYKColorspace,exception);
217  image->resolution.x=1.0*image->columns/width;
218  image->resolution.y=1.0*image->rows/height;
219  if (image_info->ping != MagickFalse)
220    {
221      (void) CloseBlob(image);
222      return(GetFirstImageInList(image));
223    }
224  status=SetImageExtent(image,image->columns,image->rows,exception);
225  if (status == MagickFalse)
226    return(DestroyImageList(image));
227  /*
228    Convert SCT raster image to pixel packets.
229  */
230  for (y=0; y < (ssize_t) image->rows; y++)
231  {
232    for (i=0; i < (ssize_t) separations; i++)
233    {
234      q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
235      if (q == (Quantum *) NULL)
236        break;
237      for (x=0; x < (ssize_t) image->columns; x++)
238      {
239        pixel=(Quantum) ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
240        if (image->colorspace == CMYKColorspace)
241          pixel=(Quantum) (QuantumRange-pixel);
242        switch (i)
243        {
244          case 0:
245          {
246            SetPixelRed(image,pixel,q);
247            SetPixelGreen(image,pixel,q);
248            SetPixelBlue(image,pixel,q);
249            break;
250          }
251          case 1:
252          {
253            SetPixelGreen(image,pixel,q);
254            break;
255          }
256          case 2:
257          {
258            SetPixelBlue(image,pixel,q);
259            break;
260          }
261          case 3:
262          {
263            if (image->colorspace == CMYKColorspace)
264              SetPixelBlack(image,pixel,q);
265            break;
266          }
267        }
268        q+=GetPixelChannels(image);
269      }
270      if (SyncAuthenticPixels(image,exception) == MagickFalse)
271        break;
272      if ((image->columns % 2) != 0)
273        (void) ReadBlobByte(image);  /* pad */
274    }
275    status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
276      image->rows);
277    if (status == MagickFalse)
278      break;
279  }
280  if (EOFBlob(image) != MagickFalse)
281    ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
282      image->filename);
283  (void) CloseBlob(image);
284  return(GetFirstImageInList(image));
285}
286
287/*
288%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
289%                                                                             %
290%                                                                             %
291%                                                                             %
292%   R e g i s t e r S C T I m a g e                                           %
293%                                                                             %
294%                                                                             %
295%                                                                             %
296%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
297%
298%  RegisterSCTImage() adds attributes for the SCT image format to
299%  the list of supported formats.  The attributes include the image format
300%  tag, a method to read and/or write the format, whether the format
301%  supports the saving of more than one frame to the same file or blob,
302%  whether the format supports native in-memory I/O, and a brief
303%  description of the format.
304%
305%  The format of the RegisterSCTImage method is:
306%
307%      size_t RegisterSCTImage(void)
308%
309*/
310ModuleExport size_t RegisterSCTImage(void)
311{
312  MagickInfo
313    *entry;
314
315  entry=AcquireMagickInfo("SCT","SCT","Scitex HandShake");
316  entry->decoder=(DecodeImageHandler *) ReadSCTImage;
317  entry->magick=(IsImageFormatHandler *) IsSCT;
318  entry->flags^=CoderAdjoinFlag;
319  (void) RegisterMagickInfo(entry);
320  return(MagickImageCoderSignature);
321}
322
323/*
324%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
325%                                                                             %
326%                                                                             %
327%                                                                             %
328%   U n r e g i s t e r S C T I m a g e                                       %
329%                                                                             %
330%                                                                             %
331%                                                                             %
332%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
333%
334%  UnregisterSCTImage() removes format registrations made by the
335%  SCT module from the list of supported formats.
336%
337%  The format of the UnregisterSCTImage method is:
338%
339%      UnregisterSCTImage(void)
340%
341*/
342ModuleExport void UnregisterSCTImage(void)
343{
344  (void) UnregisterMagickInfo("SCT");
345}
346