Mercurial > hg > orthanc
annotate Core/Images/PngWriter.cpp @ 3038:53d583d2c775 db-changes
removing IDatabaseWrapper::LookupIdentifier()
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 19 Dec 2018 18:06:46 +0100 |
parents | 52217dc47a4e |
children | 4e43e67f8ecf |
rev | line source |
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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) 2017-2018 Osimis S.A., 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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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 } |