Mercurial > hg > orthanc
annotate Core/Images/PngWriter.cpp @ 2217:4f39ab2cb453
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 12 Dec 2016 11:56:26 +0100 |
| parents | 35febe19e874 |
| children | a3a65de1840f |
| 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 |
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43 #if ORTHANC_SANDBOXED == 0 |
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44 # include "../SystemToolbox.h" |
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45 #endif |
| 0 | 46 |
| 47 | |
| 48 // http://www.libpng.org/pub/png/libpng-1.2.5-manual.html#section-4 | |
| 49 // http://zarb.org/~gc/html/libpng.html | |
| 50 /* | |
| 51 void write_row_callback(png_ptr, png_uint_32 row, int pass) | |
| 52 { | |
| 53 }*/ | |
| 54 | |
| 55 | |
| 56 | |
| 57 | |
| 58 /* bool isError_; | |
| 59 | |
| 60 // http://www.libpng.org/pub/png/book/chapter14.html#png.ch14.div.2 | |
| 61 | |
| 62 static void ErrorHandler(png_structp png, png_const_charp message) | |
| 63 { | |
| 64 printf("** [%s]\n", message); | |
| 65 | |
| 66 PngWriter* that = (PngWriter*) png_get_error_ptr(png); | |
| 67 that->isError_ = true; | |
| 68 printf("** %d\n", (int)that); | |
| 69 | |
| 70 //((PngWriter*) payload)->isError_ = true; | |
| 71 } | |
| 72 | |
| 73 static void WarningHandler(png_structp png, png_const_charp message) | |
| 74 { | |
| 75 printf("++ %d\n", (int)message); | |
| 76 }*/ | |
| 77 | |
| 78 | |
| 59 | 79 namespace Orthanc |
| 0 | 80 { |
| 81 struct PngWriter::PImpl | |
| 82 { | |
| 83 png_structp png_; | |
| 84 png_infop info_; | |
| 85 | |
| 86 // Filled by Prepare() | |
| 87 std::vector<uint8_t*> rows_; | |
| 88 int bitDepth_; | |
| 89 int colorType_; | |
| 90 }; | |
| 91 | |
| 92 | |
| 93 | |
| 94 PngWriter::PngWriter() : pimpl_(new PImpl) | |
| 95 { | |
| 96 pimpl_->png_ = NULL; | |
| 97 pimpl_->info_ = NULL; | |
| 98 | |
| 99 pimpl_->png_ = png_create_write_struct | |
| 100 (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); //this, ErrorHandler, WarningHandler); | |
| 101 if (!pimpl_->png_) | |
| 102 { | |
| 59 | 103 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 104 } |
| 105 | |
| 106 pimpl_->info_ = png_create_info_struct(pimpl_->png_); | |
| 107 if (!pimpl_->info_) | |
| 108 { | |
| 109 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 59 | 110 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 111 } |
| 112 } | |
| 113 | |
| 114 PngWriter::~PngWriter() | |
| 115 { | |
| 116 if (pimpl_->info_) | |
| 117 { | |
| 118 png_destroy_info_struct(pimpl_->png_, &pimpl_->info_); | |
| 119 } | |
| 120 | |
| 121 if (pimpl_->png_) | |
| 122 { | |
| 123 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 | |
| 128 | |
| 129 void PngWriter::Prepare(unsigned int width, | |
| 130 unsigned int height, | |
| 131 unsigned int pitch, | |
| 132 PixelFormat format, | |
| 133 const void* buffer) | |
| 134 { | |
| 135 pimpl_->rows_.resize(height); | |
| 136 for (unsigned int y = 0; y < height; y++) | |
| 137 { | |
| 138 pimpl_->rows_[y] = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer)) + y * pitch; | |
| 139 } | |
| 140 | |
| 141 switch (format) | |
| 142 { | |
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143 case PixelFormat_RGB24: |
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144 pimpl_->bitDepth_ = 8; |
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145 pimpl_->colorType_ = PNG_COLOR_TYPE_RGB; |
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146 break; |
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147 |
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148 case PixelFormat_RGBA32: |
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149 pimpl_->bitDepth_ = 8; |
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150 pimpl_->colorType_ = PNG_COLOR_TYPE_RGBA; |
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151 break; |
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152 |
| 0 | 153 case PixelFormat_Grayscale8: |
| 154 pimpl_->bitDepth_ = 8; | |
| 155 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 156 break; | |
| 157 | |
| 158 case PixelFormat_Grayscale16: | |
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159 case PixelFormat_SignedGrayscale16: |
| 0 | 160 pimpl_->bitDepth_ = 16; |
| 161 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 162 break; | |
| 163 | |
| 164 default: | |
| 59 | 165 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 166 } |
| 167 } | |
| 168 | |
| 169 | |
| 170 void PngWriter::Compress(unsigned int width, | |
| 171 unsigned int height, | |
| 172 unsigned int pitch, | |
| 173 PixelFormat format) | |
| 174 { | |
| 175 png_set_IHDR(pimpl_->png_, pimpl_->info_, width, height, | |
| 176 pimpl_->bitDepth_, pimpl_->colorType_, PNG_INTERLACE_NONE, | |
| 177 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); | |
| 178 | |
| 179 png_write_info(pimpl_->png_, pimpl_->info_); | |
| 180 | |
| 181 if (height > 0) | |
| 182 { | |
| 183 switch (format) | |
| 184 { | |
| 185 case PixelFormat_Grayscale16: | |
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186 case PixelFormat_SignedGrayscale16: |
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187 { |
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188 int transforms = 0; |
| 453 | 189 if (Toolbox::DetectEndianness() == Endianness_Little) |
| 190 { | |
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191 transforms = PNG_TRANSFORM_SWAP_ENDIAN; |
| 453 | 192 } |
| 193 | |
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194 png_set_rows(pimpl_->png_, pimpl_->info_, &pimpl_->rows_[0]); |
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195 png_write_png(pimpl_->png_, pimpl_->info_, transforms, NULL); |
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196 |
| 0 | 197 break; |
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198 } |
| 0 | 199 |
| 200 default: | |
| 201 png_write_image(pimpl_->png_, &pimpl_->rows_[0]); | |
| 202 } | |
| 203 } | |
| 204 | |
| 205 png_write_end(pimpl_->png_, NULL); | |
| 206 } | |
| 207 | |
| 208 | |
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209 #if ORTHANC_SANDBOXED == 0 |
| 1916 | 210 void PngWriter::WriteToFileInternal(const std::string& filename, |
| 211 unsigned int width, | |
| 212 unsigned int height, | |
| 213 unsigned int pitch, | |
| 214 PixelFormat format, | |
| 215 const void* buffer) | |
| 0 | 216 { |
| 217 Prepare(width, height, pitch, format, buffer); | |
| 218 | |
| 2140 | 219 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary); |
| 0 | 220 if (!fp) |
| 221 { | |
| 59 | 222 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 223 } |
| 224 | |
| 225 png_init_io(pimpl_->png_, fp); | |
| 226 | |
| 227 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 228 { | |
| 229 // Error during writing PNG | |
| 59 | 230 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 231 } |
| 232 | |
| 233 Compress(width, height, pitch, format); | |
| 234 | |
| 235 fclose(fp); | |
| 236 } | |
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237 #endif |
| 0 | 238 |
| 239 | |
| 240 static void MemoryCallback(png_structp png_ptr, | |
| 241 png_bytep data, | |
| 242 png_size_t size) | |
| 243 { | |
| 656 | 244 ChunkedBuffer* buffer = reinterpret_cast<ChunkedBuffer*>(png_get_io_ptr(png_ptr)); |
| 0 | 245 buffer->AddChunk(reinterpret_cast<const char*>(data), size); |
| 246 } | |
| 247 | |
| 248 | |
| 249 | |
| 1916 | 250 void PngWriter::WriteToMemoryInternal(std::string& png, |
| 251 unsigned int width, | |
| 252 unsigned int height, | |
| 253 unsigned int pitch, | |
| 254 PixelFormat format, | |
| 255 const void* buffer) | |
| 0 | 256 { |
| 257 ChunkedBuffer chunks; | |
| 258 | |
| 259 Prepare(width, height, pitch, format, buffer); | |
| 260 | |
| 261 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 262 { | |
| 263 // Error during writing PNG | |
| 59 | 264 throw OrthancException(ErrorCode_InternalError); |
| 0 | 265 } |
| 266 | |
| 267 png_set_write_fn(pimpl_->png_, &chunks, MemoryCallback, NULL); | |
| 268 | |
| 269 Compress(width, height, pitch, format); | |
| 270 | |
| 271 chunks.Flatten(png); | |
| 272 } | |
| 273 } |