Mercurial > hg > orthanc
annotate OrthancFramework/Sources/Images/PngReader.cpp @ 4127:5be586c6a23e framework-lgpl
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 07 Jul 2020 20:28:09 +0200 |
| parents | bf7b9edf6b81 |
| children | 2d5209153b32 |
| 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) 2017-2020 Osimis S.A., Belgium |
| 455 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
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8 * modify it under the terms of the GNU Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
| 455 | 11 * |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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15 * Lesser General Public License for more details. |
| 455 | 16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
| 455 | 20 **/ |
| 21 | |
| 22 | |
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23 #include "../PrecompiledHeaders.h" |
| 455 | 24 #include "PngReader.h" |
| 25 | |
| 26 #include "../OrthancException.h" | |
| 27 #include "../Toolbox.h" | |
| 28 | |
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29 #if ORTHANC_SANDBOXED == 0 |
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30 # include "../SystemToolbox.h" |
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31 #endif |
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32 |
| 455 | 33 #include <png.h> |
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34 #include <string.h> // For memcpy() |
| 455 | 35 |
| 36 namespace Orthanc | |
| 37 { | |
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38 #if ORTHANC_SANDBOXED == 0 |
| 455 | 39 namespace |
| 40 { | |
| 41 struct FileRabi | |
| 42 { | |
| 43 FILE* fp_; | |
| 44 | |
| 45 FileRabi(const char* filename) | |
| 46 { | |
| 2140 | 47 fp_ = SystemToolbox::OpenFile(filename, FileMode_ReadBinary); |
| 455 | 48 if (!fp_) |
| 49 { | |
| 50 throw OrthancException(ErrorCode_InexistentFile); | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 ~FileRabi() | |
| 55 { | |
| 56 if (fp_) | |
| 2017 | 57 { |
| 455 | 58 fclose(fp_); |
| 2017 | 59 } |
| 455 | 60 } |
| 61 }; | |
| 62 } | |
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63 #endif |
| 455 | 64 |
| 65 | |
| 66 struct PngReader::PngRabi | |
| 67 { | |
| 68 png_structp png_; | |
| 69 png_infop info_; | |
| 70 png_infop endInfo_; | |
| 71 | |
| 72 void Destruct() | |
| 73 { | |
| 74 if (png_) | |
| 75 { | |
| 76 png_destroy_read_struct(&png_, &info_, &endInfo_); | |
| 77 | |
| 78 png_ = NULL; | |
| 79 info_ = NULL; | |
| 80 endInfo_ = NULL; | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 PngRabi() | |
| 85 { | |
| 86 png_ = NULL; | |
| 87 info_ = NULL; | |
| 88 endInfo_ = NULL; | |
| 89 | |
| 90 png_ = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); | |
| 91 if (!png_) | |
| 92 { | |
| 93 throw OrthancException(ErrorCode_NotEnoughMemory); | |
| 94 } | |
| 95 | |
| 96 info_ = png_create_info_struct(png_); | |
| 97 if (!info_) | |
| 98 { | |
| 99 png_destroy_read_struct(&png_, NULL, NULL); | |
| 100 throw OrthancException(ErrorCode_NotEnoughMemory); | |
| 101 } | |
| 102 | |
| 103 endInfo_ = png_create_info_struct(png_); | |
| 104 if (!info_) | |
| 105 { | |
| 106 png_destroy_read_struct(&png_, &info_, NULL); | |
| 107 throw OrthancException(ErrorCode_NotEnoughMemory); | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 ~PngRabi() | |
| 112 { | |
| 113 Destruct(); | |
| 114 } | |
| 115 | |
| 116 static void MemoryCallback(png_structp png_ptr, | |
| 117 png_bytep data, | |
| 118 png_size_t size); | |
| 119 }; | |
| 120 | |
| 121 | |
| 122 void PngReader::CheckHeader(const void* header) | |
| 123 { | |
| 124 int is_png = !png_sig_cmp((png_bytep) header, 0, 8); | |
| 125 if (!is_png) | |
| 126 { | |
| 127 throw OrthancException(ErrorCode_BadFileFormat); | |
| 128 } | |
| 129 } | |
| 130 | |
| 131 PngReader::PngReader() | |
| 132 { | |
| 133 } | |
| 134 | |
| 135 void PngReader::Read(PngRabi& rabi) | |
| 136 { | |
| 137 png_set_sig_bytes(rabi.png_, 8); | |
| 138 | |
| 139 png_read_info(rabi.png_, rabi.info_); | |
| 140 | |
| 141 png_uint_32 width, height; | |
| 142 int bit_depth, color_type, interlace_type; | |
| 143 int compression_type, filter_method; | |
| 144 // get size and bit-depth of the PNG-image | |
| 145 png_get_IHDR(rabi.png_, rabi.info_, | |
| 146 &width, &height, | |
| 147 &bit_depth, &color_type, &interlace_type, | |
| 148 &compression_type, &filter_method); | |
| 149 | |
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150 PixelFormat format; |
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151 unsigned int pitch; |
| 455 | 152 |
| 153 if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth == 8) | |
| 154 { | |
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155 format = PixelFormat_Grayscale8; |
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156 pitch = width; |
| 455 | 157 } |
| 158 else if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth == 16) | |
| 159 { | |
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160 format = PixelFormat_Grayscale16; |
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161 pitch = 2 * width; |
| 455 | 162 |
| 163 if (Toolbox::DetectEndianness() == Endianness_Little) | |
| 164 { | |
| 165 png_set_swap(rabi.png_); | |
| 166 } | |
| 167 } | |
| 168 else if (color_type == PNG_COLOR_TYPE_RGB && bit_depth == 8) | |
| 169 { | |
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170 format = PixelFormat_RGB24; |
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171 pitch = 3 * width; |
| 455 | 172 } |
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173 else if (color_type == PNG_COLOR_TYPE_RGBA && bit_depth == 8) |
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174 { |
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175 format = PixelFormat_RGBA32; |
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176 pitch = 4 * width; |
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177 } |
| 455 | 178 else |
| 179 { | |
| 180 throw OrthancException(ErrorCode_NotImplemented); | |
| 181 } | |
| 182 | |
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183 data_.resize(height * pitch); |
| 455 | 184 |
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185 if (height == 0 || width == 0) |
| 455 | 186 { |
| 187 // Empty image, we are done | |
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188 AssignEmpty(format); |
| 455 | 189 return; |
| 190 } | |
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191 |
| 455 | 192 png_read_update_info(rabi.png_, rabi.info_); |
| 193 | |
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194 std::vector<png_bytep> rows(height); |
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195 for (size_t i = 0; i < height; i++) |
| 455 | 196 { |
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197 rows[i] = &data_[0] + i * pitch; |
| 455 | 198 } |
| 199 | |
| 200 png_read_image(rabi.png_, &rows[0]); | |
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201 |
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202 AssignWritable(format, width, height, pitch, &data_[0]); |
| 455 | 203 } |
| 204 | |
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205 |
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206 #if ORTHANC_SANDBOXED == 0 |
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207 void PngReader::ReadFromFile(const std::string& filename) |
| 455 | 208 { |
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209 FileRabi f(filename.c_str()); |
| 455 | 210 |
| 211 char header[8]; | |
| 212 if (fread(header, 1, 8, f.fp_) != 8) | |
| 213 { | |
| 214 throw OrthancException(ErrorCode_BadFileFormat); | |
| 215 } | |
| 216 | |
| 217 CheckHeader(header); | |
| 218 | |
| 219 PngRabi rabi; | |
| 220 | |
| 221 if (setjmp(png_jmpbuf(rabi.png_))) | |
| 222 { | |
| 223 rabi.Destruct(); | |
| 224 throw OrthancException(ErrorCode_BadFileFormat); | |
| 225 } | |
| 226 | |
| 227 png_init_io(rabi.png_, f.fp_); | |
| 228 | |
| 229 Read(rabi); | |
| 230 } | |
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231 #endif |
| 455 | 232 |
| 233 | |
| 234 namespace | |
| 235 { | |
| 236 struct MemoryBuffer | |
| 237 { | |
| 238 const uint8_t* buffer_; | |
| 239 size_t size_; | |
| 240 size_t pos_; | |
| 241 bool ok_; | |
| 242 }; | |
| 243 } | |
| 244 | |
| 245 | |
| 246 void PngReader::PngRabi::MemoryCallback(png_structp png_ptr, | |
| 247 png_bytep outBytes, | |
| 248 png_size_t byteCountToRead) | |
| 249 { | |
| 656 | 250 MemoryBuffer* from = reinterpret_cast<MemoryBuffer*>(png_get_io_ptr(png_ptr)); |
| 455 | 251 |
| 252 if (!from->ok_) | |
| 253 { | |
| 254 return; | |
| 255 } | |
| 256 | |
| 257 if (from->pos_ + byteCountToRead > from->size_) | |
| 258 { | |
| 259 from->ok_ = false; | |
| 260 return; | |
| 261 } | |
| 262 | |
| 263 memcpy(outBytes, from->buffer_ + from->pos_, byteCountToRead); | |
| 264 | |
| 265 from->pos_ += byteCountToRead; | |
| 266 } | |
| 267 | |
| 268 | |
| 269 void PngReader::ReadFromMemory(const void* buffer, | |
| 270 size_t size) | |
| 271 { | |
| 272 if (size < 8) | |
| 273 { | |
| 274 throw OrthancException(ErrorCode_BadFileFormat); | |
| 275 } | |
| 276 | |
| 277 CheckHeader(buffer); | |
| 278 | |
| 279 PngRabi rabi; | |
| 280 | |
| 281 if (setjmp(png_jmpbuf(rabi.png_))) | |
| 282 { | |
| 283 rabi.Destruct(); | |
| 284 throw OrthancException(ErrorCode_BadFileFormat); | |
| 285 } | |
| 286 | |
| 287 MemoryBuffer tmp; | |
| 288 tmp.buffer_ = reinterpret_cast<const uint8_t*>(buffer) + 8; // We skip the header | |
| 289 tmp.size_ = size - 8; | |
| 290 tmp.pos_ = 0; | |
| 291 tmp.ok_ = true; | |
| 292 | |
| 293 png_set_read_fn(rabi.png_, &tmp, PngRabi::MemoryCallback); | |
| 294 | |
| 295 Read(rabi); | |
| 296 | |
| 297 if (!tmp.ok_) | |
| 298 { | |
| 299 throw OrthancException(ErrorCode_BadFileFormat); | |
| 300 } | |
| 301 } | |
| 302 | |
| 303 void PngReader::ReadFromMemory(const std::string& buffer) | |
| 304 { | |
| 305 if (buffer.size() != 0) | |
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306 { |
| 455 | 307 ReadFromMemory(&buffer[0], buffer.size()); |
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308 } |
| 455 | 309 else |
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310 { |
| 455 | 311 ReadFromMemory(NULL, 0); |
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312 } |
| 455 | 313 } |
| 314 } |