1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3%                                                                             %
4%                                                                             %
5%                                                                             %
6%                        H   H   AAA   L      DDDD                            %
7%                        H   H  A   A  L      D   D                           %
8%                        HHHHH  AAAAA  L      D   D                           %
9%                        H   H  A   A  L      D   D                           %
10%                        H   H  A   A  LLLLL  DDDD                            %
11%                                                                             %
12%                                                                             %
13%                   Create Identity Hald CLUT 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/colorspace.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/module.h"
55#include "MagickCore/monitor.h"
56#include "MagickCore/monitor-private.h"
57#include "MagickCore/pixel-accessor.h"
58#include "MagickCore/quantum-private.h"
59#include "MagickCore/resource_.h"
60#include "MagickCore/static.h"
61#include "MagickCore/string_.h"
62#include "MagickCore/string-private.h"
63#include "MagickCore/thread-private.h"
64
65/*
66%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
67%                                                                             %
68%                                                                             %
69%                                                                             %
70%   R e a d H A L D I m a g e                                                 %
71%                                                                             %
72%                                                                             %
73%                                                                             %
74%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
75%
76%  ReadHALDImage() creates a Hald color lookup table image and returns it.  It
77%  allocates the memory necessary for the new Image structure and returns a
78%  pointer to the new image.
79%
80%  The format of the ReadHALDImage method is:
81%
82%      Image *ReadHALDImage(const ImageInfo *image_info,
83%        ExceptionInfo *exception)
84%
85%  A description of each parameter follows:
86%
87%    o image_info: the image info.
88%
89%    o exception: return any errors or warnings in this structure.
90%
91*/
92static Image *ReadHALDImage(const ImageInfo *image_info,
93  ExceptionInfo *exception)
94{
95  Image
96    *image;
97
98  MagickBooleanType
99    status;
100
101  size_t
102    cube_size,
103    level;
104
105  ssize_t
106    y;
107
108  /*
109    Create HALD color lookup table image.
110  */
111  assert(image_info != (const ImageInfo *) NULL);
112  assert(image_info->signature == MagickCoreSignature);
113  if (image_info->debug != MagickFalse)
114    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
115      image_info->filename);
116  assert(exception != (ExceptionInfo *) NULL);
117  assert(exception->signature == MagickCoreSignature);
118  image=AcquireImage(image_info,exception);
119  level=0;
120  if (*image_info->filename != '\0')
121    level=StringToUnsignedLong(image_info->filename);
122  if (level < 2)
123    level=8;
124  status=MagickTrue;
125  cube_size=level*level;
126  image->columns=(size_t) (level*cube_size);
127  image->rows=(size_t) (level*cube_size);
128  status=SetImageExtent(image,image->columns,image->rows,exception);
129  if (status == MagickFalse)
130    return(DestroyImageList(image));
131  for (y=0; y < (ssize_t) image->rows; y+=(ssize_t) level)
132  {
133    ssize_t
134      blue,
135      green,
136      red;
137
138    register Quantum
139      *magick_restrict q;
140
141    if (status == MagickFalse)
142      continue;
143    q=QueueAuthenticPixels(image,0,y,image->columns,(size_t) level,exception);
144    if (q == (Quantum *) NULL)
145      {
146        status=MagickFalse;
147        continue;
148      }
149    blue=y/(ssize_t) level;
150    for (green=0; green < (ssize_t) cube_size; green++)
151    {
152      for (red=0; red < (ssize_t) cube_size; red++)
153      {
154        SetPixelRed(image,ClampToQuantum(QuantumRange*red/(cube_size-1.0)),q);
155        SetPixelGreen(image,ClampToQuantum(QuantumRange*green/(cube_size-1.0)),
156          q);
157        SetPixelBlue(image,ClampToQuantum(QuantumRange*blue/(cube_size-1.0)),q);
158        SetPixelAlpha(image,OpaqueAlpha,q);
159        q+=GetPixelChannels(image);
160      }
161    }
162    if (SyncAuthenticPixels(image,exception) == MagickFalse)
163      status=MagickFalse;
164  }
165  return(GetFirstImageInList(image));
166}
167
168/*
169%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
170%                                                                             %
171%                                                                             %
172%                                                                             %
173%   R e g i s t e r H A L D I m a g e                                         %
174%                                                                             %
175%                                                                             %
176%                                                                             %
177%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
178%
179%  RegisterHALDImage() adds attributes for the Hald color lookup table image
180%  format to the list of supported formats.  The attributes include the image
181%  format tag, a method to read and/or write the format, whether the format
182%  supports the saving of more than one frame to the same file or blob, whether
183%  the format supports native in-memory I/O, and a brief description of the
184%  format.
185%
186%  The format of the RegisterHALDImage method is:
187%
188%      size_t RegisterHALDImage(void)
189%
190*/
191ModuleExport size_t RegisterHALDImage(void)
192{
193  MagickInfo
194    *entry;
195
196  entry=AcquireMagickInfo("HALD","HALD",
197    "Identity Hald color lookup table image");
198  entry->decoder=(DecodeImageHandler *) ReadHALDImage;
199  entry->flags^=CoderAdjoinFlag;
200  entry->format_type=ImplicitFormatType;
201  entry->flags|=CoderRawSupportFlag;
202  entry->flags|=CoderEndianSupportFlag;
203  (void) RegisterMagickInfo(entry);
204  return(MagickImageCoderSignature);
205}
206
207/*
208%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
209%                                                                             %
210%                                                                             %
211%                                                                             %
212%   U n r e g i s t e r H A L D I m a g e                                     %
213%                                                                             %
214%                                                                             %
215%                                                                             %
216%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
217%
218%  UnregisterHALDImage() removes format registrations made by the
219%  HALD module from the list of supported formats.
220%
221%  The format of the UnregisterHALDImage method is:
222%
223%      UnregisterHALDImage(void)
224%
225*/
226ModuleExport void UnregisterHALDImage(void)
227{
228  (void) UnregisterMagickInfo("HALD");
229}
230