Mercurial > hg > orthanc
annotate OrthancFramework/Sources/Images/PngWriter.cpp @ 4119:bf7b9edf6b81 framework-lgpl
re-licensing the OrthancFramework to LGPL, in order to license Stone of Orthanc under LGPL
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 07 Jul 2020 19:17:56 +0200 |
| parents | d25f4c0fa160 |
| children | d9473bd5ed43 |
| 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) 2017-2020 Osimis S.A., Belgium |
| 0 | 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. |
| 136 | 11 * |
| 0 | 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. |
| 0 | 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/>. |
| 0 | 20 **/ |
| 21 | |
| 22 | |
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23 #include "../PrecompiledHeaders.h" |
| 0 | 24 #include "PngWriter.h" |
| 25 | |
| 26 #include <vector> | |
| 27 #include <stdint.h> | |
| 28 #include <png.h> | |
| 454 | 29 #include "../OrthancException.h" |
| 30 #include "../ChunkedBuffer.h" | |
| 31 #include "../Toolbox.h" | |
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32 |
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33 #if ORTHANC_SANDBOXED == 0 |
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34 # include "../SystemToolbox.h" |
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35 #endif |
| 0 | 36 |
| 37 | |
| 38 // http://www.libpng.org/pub/png/libpng-1.2.5-manual.html#section-4 | |
| 39 // http://zarb.org/~gc/html/libpng.html | |
| 40 /* | |
| 41 void write_row_callback(png_ptr, png_uint_32 row, int pass) | |
| 42 { | |
| 43 }*/ | |
| 44 | |
| 45 | |
| 46 | |
| 47 | |
| 48 /* bool isError_; | |
| 49 | |
| 50 // http://www.libpng.org/pub/png/book/chapter14.html#png.ch14.div.2 | |
| 51 | |
| 52 static void ErrorHandler(png_structp png, png_const_charp message) | |
| 53 { | |
| 54 printf("** [%s]\n", message); | |
| 55 | |
| 56 PngWriter* that = (PngWriter*) png_get_error_ptr(png); | |
| 57 that->isError_ = true; | |
| 58 printf("** %d\n", (int)that); | |
| 59 | |
| 60 //((PngWriter*) payload)->isError_ = true; | |
| 61 } | |
| 62 | |
| 63 static void WarningHandler(png_structp png, png_const_charp message) | |
| 64 { | |
| 65 printf("++ %d\n", (int)message); | |
| 66 }*/ | |
| 67 | |
| 68 | |
| 59 | 69 namespace Orthanc |
| 0 | 70 { |
| 71 struct PngWriter::PImpl | |
| 72 { | |
| 73 png_structp png_; | |
| 74 png_infop info_; | |
| 75 | |
| 76 // Filled by Prepare() | |
| 77 std::vector<uint8_t*> rows_; | |
| 78 int bitDepth_; | |
| 79 int colorType_; | |
| 80 }; | |
| 81 | |
| 82 | |
| 83 | |
| 84 PngWriter::PngWriter() : pimpl_(new PImpl) | |
| 85 { | |
| 86 pimpl_->png_ = NULL; | |
| 87 pimpl_->info_ = NULL; | |
| 88 | |
| 89 pimpl_->png_ = png_create_write_struct | |
| 90 (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); //this, ErrorHandler, WarningHandler); | |
| 91 if (!pimpl_->png_) | |
| 92 { | |
| 59 | 93 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 94 } |
| 95 | |
| 96 pimpl_->info_ = png_create_info_struct(pimpl_->png_); | |
| 97 if (!pimpl_->info_) | |
| 98 { | |
| 99 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 59 | 100 throw OrthancException(ErrorCode_NotEnoughMemory); |
| 0 | 101 } |
| 102 } | |
| 103 | |
| 104 PngWriter::~PngWriter() | |
| 105 { | |
| 106 if (pimpl_->info_) | |
| 107 { | |
| 108 png_destroy_info_struct(pimpl_->png_, &pimpl_->info_); | |
| 109 } | |
| 110 | |
| 111 if (pimpl_->png_) | |
| 112 { | |
| 113 png_destroy_write_struct(&pimpl_->png_, NULL); | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 | |
| 118 | |
| 119 void PngWriter::Prepare(unsigned int width, | |
| 120 unsigned int height, | |
| 121 unsigned int pitch, | |
| 122 PixelFormat format, | |
| 123 const void* buffer) | |
| 124 { | |
| 125 pimpl_->rows_.resize(height); | |
| 126 for (unsigned int y = 0; y < height; y++) | |
| 127 { | |
| 128 pimpl_->rows_[y] = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer)) + y * pitch; | |
| 129 } | |
| 130 | |
| 131 switch (format) | |
| 132 { | |
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133 case PixelFormat_RGB24: |
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134 pimpl_->bitDepth_ = 8; |
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135 pimpl_->colorType_ = PNG_COLOR_TYPE_RGB; |
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136 break; |
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137 |
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138 case PixelFormat_RGBA32: |
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139 pimpl_->bitDepth_ = 8; |
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140 pimpl_->colorType_ = PNG_COLOR_TYPE_RGBA; |
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141 break; |
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142 |
| 0 | 143 case PixelFormat_Grayscale8: |
| 144 pimpl_->bitDepth_ = 8; | |
| 145 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 146 break; | |
| 147 | |
| 148 case PixelFormat_Grayscale16: | |
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149 case PixelFormat_SignedGrayscale16: |
| 0 | 150 pimpl_->bitDepth_ = 16; |
| 151 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; | |
| 152 break; | |
| 153 | |
| 154 default: | |
| 59 | 155 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 156 } |
| 157 } | |
| 158 | |
| 159 | |
| 160 void PngWriter::Compress(unsigned int width, | |
| 161 unsigned int height, | |
| 162 unsigned int pitch, | |
| 163 PixelFormat format) | |
| 164 { | |
| 165 png_set_IHDR(pimpl_->png_, pimpl_->info_, width, height, | |
| 166 pimpl_->bitDepth_, pimpl_->colorType_, PNG_INTERLACE_NONE, | |
| 167 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); | |
| 168 | |
| 169 png_write_info(pimpl_->png_, pimpl_->info_); | |
| 170 | |
| 171 if (height > 0) | |
| 172 { | |
| 173 switch (format) | |
| 174 { | |
| 175 case PixelFormat_Grayscale16: | |
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176 case PixelFormat_SignedGrayscale16: |
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177 { |
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178 int transforms = 0; |
| 453 | 179 if (Toolbox::DetectEndianness() == Endianness_Little) |
| 180 { | |
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181 transforms = PNG_TRANSFORM_SWAP_ENDIAN; |
| 453 | 182 } |
| 183 | |
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184 png_set_rows(pimpl_->png_, pimpl_->info_, &pimpl_->rows_[0]); |
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185 png_write_png(pimpl_->png_, pimpl_->info_, transforms, NULL); |
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186 |
| 0 | 187 break; |
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188 } |
| 0 | 189 |
| 190 default: | |
| 191 png_write_image(pimpl_->png_, &pimpl_->rows_[0]); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 png_write_end(pimpl_->png_, NULL); | |
| 196 } | |
| 197 | |
| 198 | |
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199 #if ORTHANC_SANDBOXED == 0 |
| 1916 | 200 void PngWriter::WriteToFileInternal(const std::string& filename, |
| 201 unsigned int width, | |
| 202 unsigned int height, | |
| 203 unsigned int pitch, | |
| 204 PixelFormat format, | |
| 205 const void* buffer) | |
| 0 | 206 { |
| 207 Prepare(width, height, pitch, format, buffer); | |
| 208 | |
| 2140 | 209 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary); |
| 0 | 210 if (!fp) |
| 211 { | |
| 59 | 212 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 213 } |
| 214 | |
| 215 png_init_io(pimpl_->png_, fp); | |
| 216 | |
| 217 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 218 { | |
| 219 // Error during writing PNG | |
| 59 | 220 throw OrthancException(ErrorCode_CannotWriteFile); |
| 0 | 221 } |
| 222 | |
| 223 Compress(width, height, pitch, format); | |
| 224 | |
| 225 fclose(fp); | |
| 226 } | |
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227 #endif |
| 0 | 228 |
| 229 | |
| 230 static void MemoryCallback(png_structp png_ptr, | |
| 231 png_bytep data, | |
| 232 png_size_t size) | |
| 233 { | |
| 656 | 234 ChunkedBuffer* buffer = reinterpret_cast<ChunkedBuffer*>(png_get_io_ptr(png_ptr)); |
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235 buffer->AddChunk(data, size); |
| 0 | 236 } |
| 237 | |
| 238 | |
| 239 | |
| 1916 | 240 void PngWriter::WriteToMemoryInternal(std::string& png, |
| 241 unsigned int width, | |
| 242 unsigned int height, | |
| 243 unsigned int pitch, | |
| 244 PixelFormat format, | |
| 245 const void* buffer) | |
| 0 | 246 { |
| 247 ChunkedBuffer chunks; | |
| 248 | |
| 249 Prepare(width, height, pitch, format, buffer); | |
| 250 | |
| 251 if (setjmp(png_jmpbuf(pimpl_->png_))) | |
| 252 { | |
| 253 // Error during writing PNG | |
| 59 | 254 throw OrthancException(ErrorCode_InternalError); |
| 0 | 255 } |
| 256 | |
| 257 png_set_write_fn(pimpl_->png_, &chunks, MemoryCallback, NULL); | |
| 258 | |
| 259 Compress(width, height, pitch, format); | |
| 260 | |
| 261 chunks.Flatten(png); | |
| 262 } | |
| 263 } |