Mercurial > hg > orthanc
annotate Core/Images/PngReader.cpp @ 2844:99863d6245b2
New URI: "/studies/.../split" to split a study
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 28 Sep 2018 16:48:43 +0200 |
parents | 878b59270859 |
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rev | line source |
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455 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
1900 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * Copyright (C) 2017-2018 Osimis S.A., Belgium |
455 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU General Public License as | |
9 * published by the Free Software Foundation, either version 3 of the | |
10 * License, or (at your option) any later version. | |
11 * | |
12 * In addition, as a special exception, the copyright holders of this | |
13 * program give permission to link the code of its release with the | |
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
15 * that use the same license as the "OpenSSL" library), and distribute | |
16 * the linked executables. You must obey the GNU General Public License | |
17 * in all respects for all of the code used other than "OpenSSL". If you | |
18 * modify file(s) with this exception, you may extend this exception to | |
19 * your version of the file(s), but you are not obligated to do so. If | |
20 * you do not wish to do so, delete this exception statement from your | |
21 * version. If you delete this exception statement from all source files | |
22 * in the program, then also delete it here. | |
23 * | |
24 * This program is distributed in the hope that it will be useful, but | |
25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
27 * General Public License for more details. | |
28 * | |
29 * You should have received a copy of the GNU General Public License | |
30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
31 **/ | |
32 | |
33 | |
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34 #include "../PrecompiledHeaders.h" |
455 | 35 #include "PngReader.h" |
36 | |
37 #include "../OrthancException.h" | |
38 #include "../Toolbox.h" | |
39 | |
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40 #if ORTHANC_SANDBOXED == 0 |
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41 # include "../SystemToolbox.h" |
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42 #endif |
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43 |
455 | 44 #include <png.h> |
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45 #include <string.h> // For memcpy() |
455 | 46 |
47 namespace Orthanc | |
48 { | |
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49 #if ORTHANC_SANDBOXED == 0 |
455 | 50 namespace |
51 { | |
52 struct FileRabi | |
53 { | |
54 FILE* fp_; | |
55 | |
56 FileRabi(const char* filename) | |
57 { | |
2140 | 58 fp_ = SystemToolbox::OpenFile(filename, FileMode_ReadBinary); |
455 | 59 if (!fp_) |
60 { | |
61 throw OrthancException(ErrorCode_InexistentFile); | |
62 } | |
63 } | |
64 | |
65 ~FileRabi() | |
66 { | |
67 if (fp_) | |
2017 | 68 { |
455 | 69 fclose(fp_); |
2017 | 70 } |
455 | 71 } |
72 }; | |
73 } | |
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74 #endif |
455 | 75 |
76 | |
77 struct PngReader::PngRabi | |
78 { | |
79 png_structp png_; | |
80 png_infop info_; | |
81 png_infop endInfo_; | |
82 | |
83 void Destruct() | |
84 { | |
85 if (png_) | |
86 { | |
87 png_destroy_read_struct(&png_, &info_, &endInfo_); | |
88 | |
89 png_ = NULL; | |
90 info_ = NULL; | |
91 endInfo_ = NULL; | |
92 } | |
93 } | |
94 | |
95 PngRabi() | |
96 { | |
97 png_ = NULL; | |
98 info_ = NULL; | |
99 endInfo_ = NULL; | |
100 | |
101 png_ = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); | |
102 if (!png_) | |
103 { | |
104 throw OrthancException(ErrorCode_NotEnoughMemory); | |
105 } | |
106 | |
107 info_ = png_create_info_struct(png_); | |
108 if (!info_) | |
109 { | |
110 png_destroy_read_struct(&png_, NULL, NULL); | |
111 throw OrthancException(ErrorCode_NotEnoughMemory); | |
112 } | |
113 | |
114 endInfo_ = png_create_info_struct(png_); | |
115 if (!info_) | |
116 { | |
117 png_destroy_read_struct(&png_, &info_, NULL); | |
118 throw OrthancException(ErrorCode_NotEnoughMemory); | |
119 } | |
120 } | |
121 | |
122 ~PngRabi() | |
123 { | |
124 Destruct(); | |
125 } | |
126 | |
127 static void MemoryCallback(png_structp png_ptr, | |
128 png_bytep data, | |
129 png_size_t size); | |
130 }; | |
131 | |
132 | |
133 void PngReader::CheckHeader(const void* header) | |
134 { | |
135 int is_png = !png_sig_cmp((png_bytep) header, 0, 8); | |
136 if (!is_png) | |
137 { | |
138 throw OrthancException(ErrorCode_BadFileFormat); | |
139 } | |
140 } | |
141 | |
142 PngReader::PngReader() | |
143 { | |
144 } | |
145 | |
146 void PngReader::Read(PngRabi& rabi) | |
147 { | |
148 png_set_sig_bytes(rabi.png_, 8); | |
149 | |
150 png_read_info(rabi.png_, rabi.info_); | |
151 | |
152 png_uint_32 width, height; | |
153 int bit_depth, color_type, interlace_type; | |
154 int compression_type, filter_method; | |
155 // get size and bit-depth of the PNG-image | |
156 png_get_IHDR(rabi.png_, rabi.info_, | |
157 &width, &height, | |
158 &bit_depth, &color_type, &interlace_type, | |
159 &compression_type, &filter_method); | |
160 | |
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161 PixelFormat format; |
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162 unsigned int pitch; |
455 | 163 |
164 if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth == 8) | |
165 { | |
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166 format = PixelFormat_Grayscale8; |
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167 pitch = width; |
455 | 168 } |
169 else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth == 16) | |
170 { | |
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171 format = PixelFormat_Grayscale16; |
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172 pitch = 2 * width; |
455 | 173 |
174 if (Toolbox::DetectEndianness() == Endianness_Little) | |
175 { | |
176 png_set_swap(rabi.png_); | |
177 } | |
178 } | |
179 else if (color_type == PNG_COLOR_TYPE_RGB && bit_depth == 8) | |
180 { | |
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181 format = PixelFormat_RGB24; |
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182 pitch = 3 * width; |
455 | 183 } |
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184 else if (color_type == PNG_COLOR_TYPE_RGBA && bit_depth == 8) |
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185 { |
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186 format = PixelFormat_RGBA32; |
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187 pitch = 4 * width; |
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188 } |
455 | 189 else |
190 { | |
191 throw OrthancException(ErrorCode_NotImplemented); | |
192 } | |
193 | |
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194 data_.resize(height * pitch); |
455 | 195 |
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196 if (height == 0 || width == 0) |
455 | 197 { |
198 // Empty image, we are done | |
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199 AssignEmpty(format); |
455 | 200 return; |
201 } | |
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202 |
455 | 203 png_read_update_info(rabi.png_, rabi.info_); |
204 | |
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205 std::vector<png_bytep> rows(height); |
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206 for (size_t i = 0; i < height; i++) |
455 | 207 { |
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208 rows[i] = &data_[0] + i * pitch; |
455 | 209 } |
210 | |
211 png_read_image(rabi.png_, &rows[0]); | |
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212 |
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213 AssignWritable(format, width, height, pitch, &data_[0]); |
455 | 214 } |
215 | |
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216 |
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217 #if ORTHANC_SANDBOXED == 0 |
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218 void PngReader::ReadFromFile(const std::string& filename) |
455 | 219 { |
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220 FileRabi f(filename.c_str()); |
455 | 221 |
222 char header[8]; | |
223 if (fread(header, 1, 8, f.fp_) != 8) | |
224 { | |
225 throw OrthancException(ErrorCode_BadFileFormat); | |
226 } | |
227 | |
228 CheckHeader(header); | |
229 | |
230 PngRabi rabi; | |
231 | |
232 if (setjmp(png_jmpbuf(rabi.png_))) | |
233 { | |
234 rabi.Destruct(); | |
235 throw OrthancException(ErrorCode_BadFileFormat); | |
236 } | |
237 | |
238 png_init_io(rabi.png_, f.fp_); | |
239 | |
240 Read(rabi); | |
241 } | |
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242 #endif |
455 | 243 |
244 | |
245 namespace | |
246 { | |
247 struct MemoryBuffer | |
248 { | |
249 const uint8_t* buffer_; | |
250 size_t size_; | |
251 size_t pos_; | |
252 bool ok_; | |
253 }; | |
254 } | |
255 | |
256 | |
257 void PngReader::PngRabi::MemoryCallback(png_structp png_ptr, | |
258 png_bytep outBytes, | |
259 png_size_t byteCountToRead) | |
260 { | |
656 | 261 MemoryBuffer* from = reinterpret_cast<MemoryBuffer*>(png_get_io_ptr(png_ptr)); |
455 | 262 |
263 if (!from->ok_) | |
264 { | |
265 return; | |
266 } | |
267 | |
268 if (from->pos_ + byteCountToRead > from->size_) | |
269 { | |
270 from->ok_ = false; | |
271 return; | |
272 } | |
273 | |
274 memcpy(outBytes, from->buffer_ + from->pos_, byteCountToRead); | |
275 | |
276 from->pos_ += byteCountToRead; | |
277 } | |
278 | |
279 | |
280 void PngReader::ReadFromMemory(const void* buffer, | |
281 size_t size) | |
282 { | |
283 if (size < 8) | |
284 { | |
285 throw OrthancException(ErrorCode_BadFileFormat); | |
286 } | |
287 | |
288 CheckHeader(buffer); | |
289 | |
290 PngRabi rabi; | |
291 | |
292 if (setjmp(png_jmpbuf(rabi.png_))) | |
293 { | |
294 rabi.Destruct(); | |
295 throw OrthancException(ErrorCode_BadFileFormat); | |
296 } | |
297 | |
298 MemoryBuffer tmp; | |
299 tmp.buffer_ = reinterpret_cast<const uint8_t*>(buffer) + 8; // We skip the header | |
300 tmp.size_ = size - 8; | |
301 tmp.pos_ = 0; | |
302 tmp.ok_ = true; | |
303 | |
304 png_set_read_fn(rabi.png_, &tmp, PngRabi::MemoryCallback); | |
305 | |
306 Read(rabi); | |
307 | |
308 if (!tmp.ok_) | |
309 { | |
310 throw OrthancException(ErrorCode_BadFileFormat); | |
311 } | |
312 } | |
313 | |
314 void PngReader::ReadFromMemory(const std::string& buffer) | |
315 { | |
316 if (buffer.size() != 0) | |
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317 { |
455 | 318 ReadFromMemory(&buffer[0], buffer.size()); |
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319 } |
455 | 320 else |
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321 { |
455 | 322 ReadFromMemory(NULL, 0); |
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323 } |
455 | 324 } |
325 } |