Mercurial > hg > orthanc
annotate Core/Images/PngWriter.cpp @ 2170:baf8dd89b4e0
improved support for sandboxed environments
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 23 Nov 2016 11:45:02 +0100 |
| parents | fd5875662670 |
| children | 35febe19e874 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 59 | 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 |
| 0 | 5 * |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU General Public License as | |
| 8 * published by the Free Software Foundation, either version 3 of the | |
| 9 * License, or (at your option) any later version. | |
| 136 | 10 * |
| 11 * In addition, as a special exception, the copyright holders of this | |
| 12 * program give permission to link the code of its release with the | |
| 13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 14 * that use the same license as the "OpenSSL" library), and distribute | |
| 15 * the linked executables. You must obey the GNU General Public License | |
| 16 * in all respects for all of the code used other than "OpenSSL". If you | |
| 17 * modify file(s) with this exception, you may extend this exception to | |
| 18 * your version of the file(s), but you are not obligated to do so. If | |
| 19 * you do not wish to do so, delete this exception statement from your | |
| 20 * version. If you delete this exception statement from all source files | |
| 21 * in the program, then also delete it here. | |
| 0 | 22 * |
| 23 * This program is distributed in the hope that it will be useful, but | |
| 24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 26 * General Public License for more details. | |
| 27 * | |
| 28 * You should have received a copy of the GNU General Public License | |
| 29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 30 **/ | |
| 31 | |
| 32 | |
|
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precompiled headers
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33 #include "../PrecompiledHeaders.h" |
| 0 | 34 #include "PngWriter.h" |
| 35 | |
| 36 #include <vector> | |
| 37 #include <stdint.h> | |
| 38 #include <png.h> | |
| 454 | 39 #include "../OrthancException.h" |
| 40 #include "../ChunkedBuffer.h" | |
| 41 #include "../Toolbox.h" | |
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42 #include "../SystemToolbox.h" |
| 0 | 43 |
| 44 | |
| 45 // http://www.libpng.org/pub/png/libpng-1.2.5-manual.html#section-4 | |
| 46 // http://zarb.org/~gc/html/libpng.html | |
| 47 /* | |
| 48 void write_row_callback(png_ptr, png_uint_32 row, int pass) | |
| 49 { | |
| 50 }*/ | |
| 51 | |
| 52 | |
| 53 | |
| 54 | |
| 55 /* bool isError_; | |
| 56 | |
| 57 // http://www.libpng.org/pub/png/book/chapter14.html#png.ch14.div.2 | |
| 58 | |
| 59 static void ErrorHandler(png_structp png, png_const_charp message) | |
| 60 { | |
| 61 printf("** [%s]\n", message); | |
| 62 | |
| 63 PngWriter* that = (PngWriter*) png_get_error_ptr(png); | |
| 64 that->isError_ = true; | |
| 65 printf("** %d\n", (int)that); | |
| 66 | |
| 67 //((PngWriter*) payload)->isError_ = true; | |
| 68 } | |
| 69 | |
| 70 static void WarningHandler(png_structp png, png_const_charp message) | |
| 71 { | |
| 72 printf("++ %d\n", (int)message); | |
| 73 }*/ | |
| 74 | |
| 75 | |
| 59 | 76 namespace Orthanc |
| 0 | 77 { |
| 78 struct PngWriter::PImpl | |
| 79 { | |
| 80 png_structp png_; | |
| 81 png_infop info_; | |
| 82 | |
| 83 // Filled by Prepare() | |
| 84 std::vector<uint8_t*> rows_; | |
| 85 int bitDepth_; | |
| 86 int colorType_; | |
| 87 }; | |
| 88 | |
| 89 | |
| 90 | |
| 91 PngWriter::PngWriter() : pimpl_(new PImpl) | |
| 92 { | |
| 93 pimpl_->png_ = NULL; | |
| 94 pimpl_->info_ = NULL; | |
| 95 | |
| 96 pimpl_->png_ = png_create_write_struct | |
| 97 (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); //this, ErrorHandler, WarningHandler); | |
| 98 if (!pimpl_->png_) | |
| 99 { | |
| 59 | 100 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 101 } |
| 102 | |
| 103 pimpl_->info_ = png_create_info_struct(pimpl_->png_); | |
| 104 if (!pimpl_->info_) | |
| 105 { | |
| 106 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 59 | 107 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 108 } |
| 109 } | |
| 110 | |
| 111 PngWriter::~PngWriter() | |
| 112 { | |
| 113 if (pimpl_->info_) | |
| 114 { | |
| 115 png_destroy_info_struct(pimpl_->png_, &pimpl_->info_); | |
| 116 } | |
| 117 | |
| 118 if (pimpl_->png_) | |
| 119 { | |
| 120 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 | |
| 125 | |
| 126 void PngWriter::Prepare(unsigned int width, | |
| 127 unsigned int height, | |
| 128 unsigned int pitch, | |
| 129 PixelFormat format, | |
| 130 const void* buffer) | |
| 131 { | |
| 132 pimpl_->rows_.resize(height); | |
| 133 for (unsigned int y = 0; y < height; y++) | |
| 134 { | |
| 135 pimpl_->rows_[y] = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer)) + y * pitch; | |
| 136 } | |
| 137 | |
| 138 switch (format) | |
| 139 { | |
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140 case PixelFormat_RGB24: |
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141 pimpl_->bitDepth_ = 8; |
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142 pimpl_->colorType_ = PNG_COLOR_TYPE_RGB; |
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143 break; |
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144 |
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145 case PixelFormat_RGBA32: |
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146 pimpl_->bitDepth_ = 8; |
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147 pimpl_->colorType_ = PNG_COLOR_TYPE_RGBA; |
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148 break; |
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149 |
| 0 | 150 case PixelFormat_Grayscale8: |
| 151 pimpl_->bitDepth_ = 8; | |
| 152 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 153 break; | |
| 154 | |
| 155 case PixelFormat_Grayscale16: | |
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156 case PixelFormat_SignedGrayscale16: |
| 0 | 157 pimpl_->bitDepth_ = 16; |
| 158 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 159 break; | |
| 160 | |
| 161 default: | |
| 59 | 162 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 163 } |
| 164 } | |
| 165 | |
| 166 | |
| 167 void PngWriter::Compress(unsigned int width, | |
| 168 unsigned int height, | |
| 169 unsigned int pitch, | |
| 170 PixelFormat format) | |
| 171 { | |
| 172 png_set_IHDR(pimpl_->png_, pimpl_->info_, width, height, | |
| 173 pimpl_->bitDepth_, pimpl_->colorType_, PNG_INTERLACE_NONE, | |
| 174 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); | |
| 175 | |
| 176 png_write_info(pimpl_->png_, pimpl_->info_); | |
| 177 | |
| 178 if (height > 0) | |
| 179 { | |
| 180 switch (format) | |
| 181 { | |
| 182 case PixelFormat_Grayscale16: | |
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183 case PixelFormat_SignedGrayscale16: |
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184 { |
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185 int transforms = 0; |
| 453 | 186 if (Toolbox::DetectEndianness() == Endianness_Little) |
| 187 { | |
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188 transforms = PNG_TRANSFORM_SWAP_ENDIAN; |
| 453 | 189 } |
| 190 | |
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191 png_set_rows(pimpl_->png_, pimpl_->info_, &pimpl_->rows_[0]); |
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192 png_write_png(pimpl_->png_, pimpl_->info_, transforms, NULL); |
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193 |
| 0 | 194 break; |
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195 } |
| 0 | 196 |
| 197 default: | |
| 198 png_write_image(pimpl_->png_, &pimpl_->rows_[0]); | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 png_write_end(pimpl_->png_, NULL); | |
| 203 } | |
| 204 | |
| 205 | |
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206 #if ORTHANC_SANDBOXED == 0 |
| 1916 | 207 void PngWriter::WriteToFileInternal(const std::string& filename, |
| 208 unsigned int width, | |
| 209 unsigned int height, | |
| 210 unsigned int pitch, | |
| 211 PixelFormat format, | |
| 212 const void* buffer) | |
| 0 | 213 { |
| 214 Prepare(width, height, pitch, format, buffer); | |
| 215 | |
| 2140 | 216 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary); |
| 0 | 217 if (!fp) |
| 218 { | |
| 59 | 219 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 220 } |
| 221 | |
| 222 png_init_io(pimpl_->png_, fp); | |
| 223 | |
| 224 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 225 { | |
| 226 // Error during writing PNG | |
| 59 | 227 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 228 } |
| 229 | |
| 230 Compress(width, height, pitch, format); | |
| 231 | |
| 232 fclose(fp); | |
| 233 } | |
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234 #endif |
| 0 | 235 |
| 236 | |
| 237 static void MemoryCallback(png_structp png_ptr, | |
| 238 png_bytep data, | |
| 239 png_size_t size) | |
| 240 { | |
| 656 | 241 ChunkedBuffer* buffer = reinterpret_cast<ChunkedBuffer*>(png_get_io_ptr(png_ptr)); |
| 0 | 242 buffer->AddChunk(reinterpret_cast<const char*>(data), size); |
| 243 } | |
| 244 | |
| 245 | |
| 246 | |
| 1916 | 247 void PngWriter::WriteToMemoryInternal(std::string& png, |
| 248 unsigned int width, | |
| 249 unsigned int height, | |
| 250 unsigned int pitch, | |
| 251 PixelFormat format, | |
| 252 const void* buffer) | |
| 0 | 253 { |
| 254 ChunkedBuffer chunks; | |
| 255 | |
| 256 Prepare(width, height, pitch, format, buffer); | |
| 257 | |
| 258 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 259 { | |
| 260 // Error during writing PNG | |
| 59 | 261 throw OrthancException(ErrorCode_InternalError); |
| 0 | 262 } |
| 263 | |
| 264 png_set_write_fn(pimpl_->png_, &chunks, MemoryCallback, NULL); | |
| 265 | |
| 266 Compress(width, height, pitch, format); | |
| 267 | |
| 268 chunks.Flatten(png); | |
| 269 } | |
| 270 } |