Mercurial > hg > orthanc
annotate Core/Images/PngReader.cpp @ 2466:ae22df152ee2
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 09 Jan 2018 12:54:00 +0100 |
| parents | 878b59270859 |
| children | 4e43e67f8ecf |
| rev | line source |
|---|---|
| 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 } |