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1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 %                                                                             %
4 %                                                                             %
5 %                                                                             %
6 %                     M   M   AAA   TTTTT  TTTTT  EEEEE                       %
7 %                     MM MM  A   A    T      T    E                           %
8 %                     M M M  AAAAA    T      T    EEE                         %
9 %                     M   M  A   A    T      T    E                           %
10 %                     M   M  A   A    T      T    EEEEE                       %
11 %                                                                             %
12 %                                                                             %
13 %                     Write Matte Channel To MIFF File.                       %
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/attribute.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/cache.h"
47 #include "MagickCore/constitute.h"
48 #include "MagickCore/exception.h"
49 #include "MagickCore/exception-private.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"
61 
62 /*
63   Forward declarations.
64 */
65 static MagickBooleanType
66   WriteMATTEImage(const ImageInfo *,Image *,ExceptionInfo *);
67 
68 /*
69 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
70 %                                                                             %
71 %                                                                             %
72 %                                                                             %
73 %   R e g i s t e r M A T T E I m a g e                                       %
74 %                                                                             %
75 %                                                                             %
76 %                                                                             %
77 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
78 %
79 %  RegisterMATTEImage() adds attributes for the MATTE image format to
80 %  the list of supported formats.  The attributes include the image format
81 %  tag, a method to read and/or write the format, whether the format
82 %  supports the saving of more than one frame to the same file or blob,
83 %  whether the format supports native in-memory I/O, and a brief
84 %  description of the format.
85 %
86 %  The format of the RegisterMATTEImage method is:
87 %
88 %      size_t RegisterMATTEImage(void)
89 %
90 */
RegisterMATTEImage(void)91 ModuleExport size_t RegisterMATTEImage(void)
92 {
93   MagickInfo
94     *entry;
95 
96   entry=AcquireMagickInfo("MATTE","MATTE","MATTE format");
97   entry->encoder=(EncodeImageHandler *) WriteMATTEImage;
98   entry->format_type=ExplicitFormatType;
99   (void) RegisterMagickInfo(entry);
100   return(MagickImageCoderSignature);
101 }
102 
103 /*
104 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
105 %                                                                             %
106 %                                                                             %
107 %                                                                             %
108 %   U n r e g i s t e r M A T T E I m a g e                                   %
109 %                                                                             %
110 %                                                                             %
111 %                                                                             %
112 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
113 %
114 %  UnregisterMATTEImage() removes format registrations made by the
115 %  MATTE module from the list of supported formats.
116 %
117 %  The format of the UnregisterMATTEImage method is:
118 %
119 %      UnregisterMATTEImage(void)
120 %
121 */
UnregisterMATTEImage(void)122 ModuleExport void UnregisterMATTEImage(void)
123 {
124   (void) UnregisterMagickInfo("MATTE");
125 }
126 
127 /*
128 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
129 %                                                                             %
130 %                                                                             %
131 %                                                                             %
132 %   W r i t e M A T T E I m a g e                                             %
133 %                                                                             %
134 %                                                                             %
135 %                                                                             %
136 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
137 %
138 %  WriteMATTEImage() writes an image of matte bytes to a file.  It consists of
139 %  data from the matte component of the image [0..255].
140 %
141 %  The format of the WriteMATTEImage method is:
142 %
143 %      MagickBooleanType WriteMATTEImage(const ImageInfo *image_info,
144 %        Image *image,ExceptionInfo *exception)
145 %
146 %  A description of each parameter follows.
147 %
148 %    o image_info: the image info.
149 %
150 %    o image:  The image.
151 %
152 %    o exception: return any errors or warnings in this structure.
153 %
154 */
WriteMATTEImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)155 static MagickBooleanType WriteMATTEImage(const ImageInfo *image_info,
156   Image *image,ExceptionInfo *exception)
157 {
158   Image
159     *matte_image;
160 
161   ImageInfo
162     *write_info;
163 
164   MagickBooleanType
165     status;
166 
167   register const Quantum
168     *p;
169 
170   register ssize_t
171     x;
172 
173   register Quantum
174     *q;
175 
176   ssize_t
177     y;
178 
179   if (image->alpha_trait == UndefinedPixelTrait)
180     ThrowWriterException(CoderError,"ImageDoesNotHaveAnAlphaChannel");
181   matte_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
182   if (matte_image == (Image *) NULL)
183     return(MagickFalse);
184   (void) SetImageType(matte_image,TrueColorAlphaType,exception);
185   matte_image->alpha_trait=UndefinedPixelTrait;
186   /*
187     Convert image to matte pixels.
188   */
189   for (y=0; y < (ssize_t) image->rows; y++)
190   {
191     p=GetVirtualPixels(image,0,y,image->columns,1,exception);
192     q=QueueAuthenticPixels(matte_image,0,y,matte_image->columns,1,exception);
193     if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
194       break;
195     for (x=0; x < (ssize_t) image->columns; x++)
196     {
197       SetPixelRed(matte_image,GetPixelAlpha(image,p),q);
198       SetPixelGreen(matte_image,GetPixelAlpha(image,p),q);
199       SetPixelBlue(matte_image,GetPixelAlpha(image,p),q);
200       SetPixelAlpha(matte_image,OpaqueAlpha,q);
201       p+=GetPixelChannels(image);
202       q+=GetPixelChannels(matte_image);
203     }
204     if (SyncAuthenticPixels(matte_image,exception) == MagickFalse)
205       break;
206     status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
207       image->rows);
208     if (status == MagickFalse)
209       break;
210   }
211   write_info=CloneImageInfo(image_info);
212   if ((*write_info->magick == '\0') ||
213       (LocaleCompare(write_info->magick,"MATTE") == 0))
214     (void) FormatLocaleString(matte_image->filename,MagickPathExtent,
215       "MIFF:%s",image->filename);
216   status=WriteImage(write_info,matte_image,exception);
217   write_info=DestroyImageInfo(write_info);
218   matte_image=DestroyImage(matte_image);
219   return(status);
220 }
221