Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / ImageMagick / 8bc3ab67d818204fe5f0fe1dc29b873d37360461 / . / coders / fd.c
blob: c22ee0fec3e25b759e406ac1fd717154fabc1fc1 [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 %
cristyde984cd2013-12-01 14:49:27 +0000[diff] [blame]16% Cristy %
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]17% Bill Radcliffe %
18% March 2000 %
19% %
20% %
Cristy7ce65e72015-12-12 18:03:16 -0500[diff] [blame]21% Copyright 1999-2016 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);
cristye1c94d92015-06-28 12:16:33 +0000[diff] [blame]100 assert(image_info->signature == MagickCoreSignature);
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]101 if (image_info->debug != MagickFalse)
102 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
103 image_info->filename);
104 assert(exception != (ExceptionInfo *) NULL);
cristye1c94d92015-06-28 12:16:33 +0000[diff] [blame]105 assert(exception->signature == MagickCoreSignature);
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]106 read_info=CloneImageInfo(image_info);
107 read_info->file=fdopen(StringToLong(image_info->filename),"rb");
cristy12d1f292015-03-16 11:16:17 +0000[diff] [blame]108 if ((read_info->file == (FILE *) NULL) ||
109 (IsGeometry(image_info->filename) == MagickFalse))
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]110 {
cristy12d1f292015-03-16 11:16:17 +0000[diff] [blame]111 read_info=DestroyImageInfo(read_info);
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]112 ThrowFileException(exception,BlobError,"UnableToOpenBlob",
113 image_info->filename);
114 return((Image *) NULL);
115 }
116 *read_info->magick='\0';
117 image=ReadImage(read_info,exception);
118 (void) fclose(read_info->file);
119 read_info=DestroyImageInfo(read_info);
120 if (image == (Image *) NULL)
121 {
122 (void) ThrowMagickException(exception,GetMagickModule(),CoderError,
123 "NoDataReturned","`%s'",image_info->filename);
124 return((Image *) NULL);
125 }
126 return(GetFirstImageInList(image));
127}
128
129/*
130%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
131% %
132% %
133% %
134% R e g i s t e r F D I m a g e %
135% %
136% %
137% %
138%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
139%
140% RegisterFDImage() adds attributes for the FD image format to
141% the list of supported formats. The attributes include the image format
142% tag, a method to read and/or write the format, whether the format
143% supports the saving of more than one frame to the same file or blob,
144% whether the format supports native in-memory I/O, and a brief
145% description of the format.
146%
147% The format of the RegisterFDImage method is:
148%
149% size_t RegisterFDImage(void)
150%
151*/
152ModuleExport size_t RegisterFDImage(void)
153{
154 MagickInfo
155 *entry;
156
dirk06b627a2015-04-06 18:59:17 +0000[diff] [blame]157 entry=AcquireMagickInfo("FD","FD","Read image from a file descriptor");
cristycf67e652012-04-03 18:03:01 +0000[diff] [blame]158 entry->decoder=(DecodeImageHandler *) ReadFDImage;
dirk08e9a112015-02-22 01:51:41 +0000[diff] [blame]159 entry->flags|=CoderStealthFlag;
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}