Mercurial > hg > orthanc
annotate Core/Images/PngWriter.cpp @ 2405:85a22aad7dfe
todo: extended association
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 15 Sep 2017 13:07:06 +0200 |
| parents | a3a65de1840f |
| children | 5edec967055e |
| 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 |
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5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 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. | |
| 136 | 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. | |
| 0 | 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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precompiled headers
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34 #include "../PrecompiledHeaders.h" |
| 0 | 35 #include "PngWriter.h" |
| 36 | |
| 37 #include <vector> | |
| 38 #include <stdint.h> | |
| 39 #include <png.h> | |
| 454 | 40 #include "../OrthancException.h" |
| 41 #include "../ChunkedBuffer.h" | |
| 42 #include "../Toolbox.h" | |
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43 |
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44 #if ORTHANC_SANDBOXED == 0 |
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45 # include "../SystemToolbox.h" |
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46 #endif |
| 0 | 47 |
| 48 | |
| 49 // http://www.libpng.org/pub/png/libpng-1.2.5-manual.html#section-4 | |
| 50 // http://zarb.org/~gc/html/libpng.html | |
| 51 /* | |
| 52 void write_row_callback(png_ptr, png_uint_32 row, int pass) | |
| 53 { | |
| 54 }*/ | |
| 55 | |
| 56 | |
| 57 | |
| 58 | |
| 59 /* bool isError_; | |
| 60 | |
| 61 // http://www.libpng.org/pub/png/book/chapter14.html#png.ch14.div.2 | |
| 62 | |
| 63 static void ErrorHandler(png_structp png, png_const_charp message) | |
| 64 { | |
| 65 printf("** [%s]\n", message); | |
| 66 | |
| 67 PngWriter* that = (PngWriter*) png_get_error_ptr(png); | |
| 68 that->isError_ = true; | |
| 69 printf("** %d\n", (int)that); | |
| 70 | |
| 71 //((PngWriter*) payload)->isError_ = true; | |
| 72 } | |
| 73 | |
| 74 static void WarningHandler(png_structp png, png_const_charp message) | |
| 75 { | |
| 76 printf("++ %d\n", (int)message); | |
| 77 }*/ | |
| 78 | |
| 79 | |
| 59 | 80 namespace Orthanc |
| 0 | 81 { |
| 82 struct PngWriter::PImpl | |
| 83 { | |
| 84 png_structp png_; | |
| 85 png_infop info_; | |
| 86 | |
| 87 // Filled by Prepare() | |
| 88 std::vector<uint8_t*> rows_; | |
| 89 int bitDepth_; | |
| 90 int colorType_; | |
| 91 }; | |
| 92 | |
| 93 | |
| 94 | |
| 95 PngWriter::PngWriter() : pimpl_(new PImpl) | |
| 96 { | |
| 97 pimpl_->png_ = NULL; | |
| 98 pimpl_->info_ = NULL; | |
| 99 | |
| 100 pimpl_->png_ = png_create_write_struct | |
| 101 (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); //this, ErrorHandler, WarningHandler); | |
| 102 if (!pimpl_->png_) | |
| 103 { | |
| 59 | 104 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 105 } |
| 106 | |
| 107 pimpl_->info_ = png_create_info_struct(pimpl_->png_); | |
| 108 if (!pimpl_->info_) | |
| 109 { | |
| 110 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 59 | 111 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 112 } |
| 113 } | |
| 114 | |
| 115 PngWriter::~PngWriter() | |
| 116 { | |
| 117 if (pimpl_->info_) | |
| 118 { | |
| 119 png_destroy_info_struct(pimpl_->png_, &pimpl_->info_); | |
| 120 } | |
| 121 | |
| 122 if (pimpl_->png_) | |
| 123 { | |
| 124 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 125 } | |
| 126 } | |
| 127 | |
| 128 | |
| 129 | |
| 130 void PngWriter::Prepare(unsigned int width, | |
| 131 unsigned int height, | |
| 132 unsigned int pitch, | |
| 133 PixelFormat format, | |
| 134 const void* buffer) | |
| 135 { | |
| 136 pimpl_->rows_.resize(height); | |
| 137 for (unsigned int y = 0; y < height; y++) | |
| 138 { | |
| 139 pimpl_->rows_[y] = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer)) + y * pitch; | |
| 140 } | |
| 141 | |
| 142 switch (format) | |
| 143 { | |
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144 case PixelFormat_RGB24: |
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145 pimpl_->bitDepth_ = 8; |
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146 pimpl_->colorType_ = PNG_COLOR_TYPE_RGB; |
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147 break; |
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148 |
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149 case PixelFormat_RGBA32: |
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150 pimpl_->bitDepth_ = 8; |
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151 pimpl_->colorType_ = PNG_COLOR_TYPE_RGBA; |
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152 break; |
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153 |
| 0 | 154 case PixelFormat_Grayscale8: |
| 155 pimpl_->bitDepth_ = 8; | |
| 156 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 157 break; | |
| 158 | |
| 159 case PixelFormat_Grayscale16: | |
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160 case PixelFormat_SignedGrayscale16: |
| 0 | 161 pimpl_->bitDepth_ = 16; |
| 162 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 163 break; | |
| 164 | |
| 165 default: | |
| 59 | 166 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 167 } |
| 168 } | |
| 169 | |
| 170 | |
| 171 void PngWriter::Compress(unsigned int width, | |
| 172 unsigned int height, | |
| 173 unsigned int pitch, | |
| 174 PixelFormat format) | |
| 175 { | |
| 176 png_set_IHDR(pimpl_->png_, pimpl_->info_, width, height, | |
| 177 pimpl_->bitDepth_, pimpl_->colorType_, PNG_INTERLACE_NONE, | |
| 178 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); | |
| 179 | |
| 180 png_write_info(pimpl_->png_, pimpl_->info_); | |
| 181 | |
| 182 if (height > 0) | |
| 183 { | |
| 184 switch (format) | |
| 185 { | |
| 186 case PixelFormat_Grayscale16: | |
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187 case PixelFormat_SignedGrayscale16: |
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188 { |
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189 int transforms = 0; |
| 453 | 190 if (Toolbox::DetectEndianness() == Endianness_Little) |
| 191 { | |
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192 transforms = PNG_TRANSFORM_SWAP_ENDIAN; |
| 453 | 193 } |
| 194 | |
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195 png_set_rows(pimpl_->png_, pimpl_->info_, &pimpl_->rows_[0]); |
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196 png_write_png(pimpl_->png_, pimpl_->info_, transforms, NULL); |
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197 |
| 0 | 198 break; |
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199 } |
| 0 | 200 |
| 201 default: | |
| 202 png_write_image(pimpl_->png_, &pimpl_->rows_[0]); | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 png_write_end(pimpl_->png_, NULL); | |
| 207 } | |
| 208 | |
| 209 | |
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210 #if ORTHANC_SANDBOXED == 0 |
| 1916 | 211 void PngWriter::WriteToFileInternal(const std::string& filename, |
| 212 unsigned int width, | |
| 213 unsigned int height, | |
| 214 unsigned int pitch, | |
| 215 PixelFormat format, | |
| 216 const void* buffer) | |
| 0 | 217 { |
| 218 Prepare(width, height, pitch, format, buffer); | |
| 219 | |
| 2140 | 220 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary); |
| 0 | 221 if (!fp) |
| 222 { | |
| 59 | 223 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 224 } |
| 225 | |
| 226 png_init_io(pimpl_->png_, fp); | |
| 227 | |
| 228 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 229 { | |
| 230 // Error during writing PNG | |
| 59 | 231 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 232 } |
| 233 | |
| 234 Compress(width, height, pitch, format); | |
| 235 | |
| 236 fclose(fp); | |
| 237 } | |
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238 #endif |
| 0 | 239 |
| 240 | |
| 241 static void MemoryCallback(png_structp png_ptr, | |
| 242 png_bytep data, | |
| 243 png_size_t size) | |
| 244 { | |
| 656 | 245 ChunkedBuffer* buffer = reinterpret_cast<ChunkedBuffer*>(png_get_io_ptr(png_ptr)); |
| 0 | 246 buffer->AddChunk(reinterpret_cast<const char*>(data), size); |
| 247 } | |
| 248 | |
| 249 | |
| 250 | |
| 1916 | 251 void PngWriter::WriteToMemoryInternal(std::string& png, |
| 252 unsigned int width, | |
| 253 unsigned int height, | |
| 254 unsigned int pitch, | |
| 255 PixelFormat format, | |
| 256 const void* buffer) | |
| 0 | 257 { |
| 258 ChunkedBuffer chunks; | |
| 259 | |
| 260 Prepare(width, height, pitch, format, buffer); | |
| 261 | |
| 262 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 263 { | |
| 264 // Error during writing PNG | |
| 59 | 265 throw OrthancException(ErrorCode_InternalError); |
| 0 | 266 } |
| 267 | |
| 268 png_set_write_fn(pimpl_->png_, &chunks, MemoryCallback, NULL); | |
| 269 | |
| 270 Compress(width, height, pitch, format); | |
| 271 | |
| 272 chunks.Flatten(png); | |
| 273 } | |
| 274 } |