Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / ImageMagick / 875270b32a5ae1a39f42cb7f6a26972d091a067e / . / coders / fd.c
blob: 3750636dbccc06efff37c20045d62e00f02c56c8 [file] [log] [blame]
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% FFFFF DDDD %
7% F D D %
8% FFF D D %
9% F D D %
10% F DDDD %
11% %
12% %
13% Retrieve An Image Via a File Descriptor. %
14% %
15% Software Design %
16% John Cristy %
17% Bill Radcliffe %
18% March 2000 %
19% %
20% %
cristy45ef08f2012-12-07 13:13:34 +0000[diff] [blame]21% Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]22% dedicated to making software imaging solutions freely available. %
23% %
24% You may not use this file except in compliance with the License. You may %
25% obtain a copy of the License at %
26% %
27% http://www.imagemagick.org/script/license.php %
28% %
29% Unless required by applicable law or agreed to in writing, software %
30% distributed under the License is distributed on an "AS IS" BASIS, %
31% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
32% See the License for the specific language governing permissions and %
33% limitations under the License. %
34% %
35%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
36%
37%
38*/
39
40/*
41 Include declarations.
42*/
43#include "MagickCore/studio.h"
44#include "MagickCore/blob.h"
45#include "MagickCore/blob-private.h"
46#include "MagickCore/constitute.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/quantum-private.h"
56#include "MagickCore/static.h"
57#include "MagickCore/resource_.h"
58#include "MagickCore/string_.h"
59#include "MagickCore/string-private.h"
60#include "MagickCore/utility.h"
61
62/*
63%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
64% %
65% %
66% %
67% R e a d F D I m a g e %
68% %
69% %
70% %
71%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
72%
73% ReadFDImage retrieves an image via a file descriptor, decodes the image,
74% and returns it. It allocates the memory necessary for the new Image
75% structure and returns a pointer to the new image.
76%
77% The format of the ReadFDImage method is:
78%
79% Image *ReadFDImage(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*/
88static Image *ReadFDImage(const ImageInfo *image_info,ExceptionInfo *exception)
89{
90 Image
91 *image;
92
93 ImageInfo
94 *read_info;
95
96 /*
97 Open image file.
98 */
99 assert(image_info != (const ImageInfo *) NULL);
100 assert(image_info->signature == MagickSignature);
101 if (image_info->debug != MagickFalse)
102 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
103 image_info->filename);
104 assert(exception != (ExceptionInfo *) NULL);
105 assert(exception->signature == MagickSignature);
106 read_info=CloneImageInfo(image_info);
107 read_info->file=fdopen(StringToLong(image_info->filename),"rb");
108 if (read_info->file == (FILE *) NULL)
109 {
110 ThrowFileException(exception,BlobError,"UnableToOpenBlob",
111 image_info->filename);
112 return((Image *) NULL);
113 }
114 *read_info->magick='\0';
115 image=ReadImage(read_info,exception);
116 (void) fclose(read_info->file);
117 read_info=DestroyImageInfo(read_info);
118 if (image == (Image *) NULL)
119 {
120 (void) ThrowMagickException(exception,GetMagickModule(),CoderError,
121 "NoDataReturned","`%s'",image_info->filename);
122 return((Image *) NULL);
123 }
124 return(GetFirstImageInList(image));
125}
126
127/*
128%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
129% %
130% %
131% %
132% R e g i s t e r F D I m a g e %
133% %
134% %
135% %
136%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
137%
138% RegisterFDImage() adds attributes for the FD image format to
139% the list of supported formats. The attributes include the image format
140% tag, a method to read and/or write the format, whether the format
141% supports the saving of more than one frame to the same file or blob,
142% whether the format supports native in-memory I/O, and a brief
143% description of the format.
144%
145% The format of the RegisterFDImage method is:
146%
147% size_t RegisterFDImage(void)
148%
149*/
150ModuleExport size_t RegisterFDImage(void)
151{
152 MagickInfo
153 *entry;
154
155 entry=SetMagickInfo("FD");
156 entry->decoder=(DecodeImageHandler *) ReadFDImage;
157 entry->description=ConstantString("Read image from a file descriptor");
158 entry->module=ConstantString("FD");
cristy46b91902012-04-03 20:33:24 +0000[diff] [blame]159 entry->stealth=MagickTrue;
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]160 (void) RegisterMagickInfo(entry);
161 return(MagickImageCoderSignature);
162}
163
164/*
165%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
166% %
167% %
168% %
169% U n r e g i s t e r F D I m a g e %
170% %
171% %
172% %
173%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
174%
175% UnregisterFDImage() removes format registrations made by the FD module from
176% the list of supported formats.
177%
178% The format of the UnregisterFDImage method is:
179%
180% UnregisterFDImage(void)
181%
182*/
183ModuleExport void UnregisterFDImage(void)
184{
185 (void) UnregisterMagickInfo("FD");
186}