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gerrit-public.fairphone.software / platform / external / ImageMagick / 16af1cbdffcc02e7239d432e5fb51734fcf9f9ff / . / coders / null.c
blob: 93b3909aa16f5f41013e9934e579469ead42d860 [file] [log] [blame]
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% N N U U L L %
7% NN N U U L L %
8% N N N U U L L %
9% N NN U U L L %
10% N N UUU LLLLL LLLLL %
11% %
12% %
13% Read/Write Image Of Uniform Color. %
14% %
15% Software Design %
16% John Cristy %
17% July 1992 %
18% %
19% %
cristy16af1cb2009-12-11 21:38:29 +0000[diff] [blame^]20% Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization %
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]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 "magick/studio.h"
43#include "magick/blob.h"
44#include "magick/blob-private.h"
45#include "magick/cache.h"
46#include "magick/color.h"
47#include "magick/color-private.h"
48#include "magick/colorspace-private.h"
49#include "magick/exception.h"
50#include "magick/exception-private.h"
51#include "magick/image.h"
52#include "magick/image-private.h"
53#include "magick/list.h"
54#include "magick/magick.h"
55#include "magick/memory_.h"
56#include "magick/pixel-private.h"
57#include "magick/quantum-private.h"
58#include "magick/static.h"
59#include "magick/string_.h"
60#include "magick/module.h"
61
62/*
63 Forward declarations.
64*/
65static MagickBooleanType
66 WriteNULLImage(const ImageInfo *,Image *);
67
68/*
69%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
70% %
71% %
72% %
73% R e a d N U L L I m a g e %
74% %
75% %
76% %
77%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
78%
79% ReadNULLImage creates a constant image and initializes it to the
80% X server color as specified by the filename. It allocates the memory
81% necessary for the new Image structure and returns a pointer to the new
82% image.
83%
84% The format of the ReadNULLImage method is:
85%
86% Image *ReadNULLImage(const ImageInfo *image_info,
87% ExceptionInfo *exception)
88%
89% A description of each parameter follows:
90%
91% o image_info: the image info.
92%
93% o exception: return any errors or warnings in this structure.
94%
95*/
96static Image *ReadNULLImage(const ImageInfo *image_info,
97 ExceptionInfo *exception)
98{
99 Image
100 *image;
101
102 long
103 y;
104
105 MagickPixelPacket
106 background;
107
108 register IndexPacket
109 *indexes;
110
111 register long
112 x;
113
114 register PixelPacket
115 *q;
116
117 /*
118 Initialize Image structure.
119 */
120 assert(image_info != (const ImageInfo *) NULL);
121 assert(image_info->signature == MagickSignature);
122 if (image_info->debug != MagickFalse)
123 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
124 image_info->filename);
125 assert(exception != (ExceptionInfo *) NULL);
126 assert(exception->signature == MagickSignature);
127 image=AcquireImage(image_info);
128 if (image->columns == 0)
129 image->columns=1;
130 if (image->rows == 0)
131 image->rows=1;
132 image->matte=MagickTrue;
133 GetMagickPixelPacket(image,&background);
134 background.opacity=(MagickRealType) TransparentOpacity;
135 if (image->colorspace == CMYKColorspace)
136 ConvertRGBToCMYK(&background);
137 for (y=0; y < (long) image->rows; y++)
138 {
139 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
140 if (q == (PixelPacket *) NULL)
141 break;
142 indexes=GetAuthenticIndexQueue(image);
143 for (x=0; x < (long) image->columns; x++)
144 {
145 SetPixelPacket(image,&background,q,indexes);
146 q++;
147 indexes++;
148 }
149 if (SyncAuthenticPixels(image,exception) == MagickFalse)
150 break;
151 }
152 return(GetFirstImageInList(image));
153}
154
155/*
156%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
157% %
158% %
159% %
160% R e g i s t e r N U L L I m a g e %
161% %
162% %
163% %
164%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
165%
166% RegisterNULLImage() adds attributes for the NULL image format to
167% the list of supported formats. The attributes include the image format
168% tag, a method to read and/or write the format, whether the format
169% supports the saving of more than one frame to the same file or blob,
170% whether the format supports native in-memory I/O, and a brief
171% description of the format.
172%
173% The format of the RegisterNULLImage method is:
174%
175% unsigned long RegisterNULLImage(void)
176%
177*/
178ModuleExport unsigned long RegisterNULLImage(void)
179{
180 MagickInfo
181 *entry;
182
183 entry=SetMagickInfo("NULL");
184 entry->decoder=(DecodeImageHandler *) ReadNULLImage;
185 entry->encoder=(EncodeImageHandler *) WriteNULLImage;
186 entry->adjoin=MagickFalse;
187 entry->format_type=ExplicitFormatType;
188 entry->description=ConstantString("Constant image of uniform color");
189 entry->module=ConstantString("NULL");
190 (void) RegisterMagickInfo(entry);
191 return(MagickImageCoderSignature);
192}
193
194/*
195%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
196% %
197% %
198% %
199% U n r e g i s t e r N U L L I m a g e %
200% %
201% %
202% %
203%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
204%
205% UnregisterNULLImage() removes format registrations made by the
206% NULL module from the list of supported formats.
207%
208% The format of the UnregisterNULLImage method is:
209%
210% UnregisterNULLImage(void)
211%
212*/
213ModuleExport void UnregisterNULLImage(void)
214{
215 (void) UnregisterMagickInfo("NULL");
216}
217
218/*
219%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
220% %
221% %
222% %
223% W r i t e N U L L I m a g e %
224% %
225% %
226% %
227%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
228%
229% WriteNULLImage writes no output at all. It is useful when specified
230% as an output format when profiling.
231%
232% The format of the WriteNULLImage method is:
233%
234% MagickBooleanType WriteNULLImage(const ImageInfo *image_info,
235% Image *image)
236%
237% A description of each parameter follows.
238%
239% o image_info: the image info.
240%
241% o image: The image.
242%
243*/
244static MagickBooleanType WriteNULLImage(const ImageInfo *image_info,
245 Image *image)
246{
247 assert(image_info != (const ImageInfo *) NULL);
248 assert(image_info->signature == MagickSignature);
249 assert(image != (Image *) NULL);
250 assert(image->signature == MagickSignature);
251 if (image->debug != MagickFalse)
252 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
253 return(MagickTrue);
254}