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annotate Core/FileFormats/PngReader.h @ 797:37adac56017a

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ImageAccessor abstraction
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 06 May 2014 12:47:26 +0200
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #pragma once
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34
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35 #include "../Enumerations.h"
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36
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37 #include <vector>
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38 #include <stdint.h>
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39 #include <boost/shared_ptr.hpp>
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40
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41 namespace Orthanc
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42 {
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43 class ImageAccessor
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44 {
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45 private:
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46 bool readOnly_;
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47 PixelFormat format_;
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48 unsigned int width_;
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49 unsigned int height_;
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50 unsigned int pitch_;
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51 void *buffer_;
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52
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53 public:
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54 ImageAccessor()
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55 {
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56 AssignEmpty(PixelFormat_Grayscale8);
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57 }
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58
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59 bool IsReadOnly() const
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60 {
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61 return readOnly_;
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62 }
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63
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64 PixelFormat GetFormat() const
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65 {
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66 return format_;
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67 }
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68
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69 unsigned int GetWidth() const
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70 {
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71 return width_;
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72 }
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73
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74 unsigned int GetHeight() const
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75 {
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76 return height_;
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77 }
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78
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79 unsigned int GetPitch() const
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80 {
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81 return pitch_;
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82 }
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83
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84 const void* GetConstBuffer() const
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85 {
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86 return buffer_;
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87 }
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88
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89 void* GetBuffer();
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90
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91 const void* GetConstRow(unsigned int y) const;
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92
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93 void* GetRow(unsigned int y);
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94
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95 void AssignEmpty(PixelFormat format);
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96
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97 void AssignReadOnly(PixelFormat format,
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98 unsigned int width,
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99 unsigned int height,
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100 unsigned int pitch,
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101 const void *buffer);
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102
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103 void AssignWritable(PixelFormat format,
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104 unsigned int width,
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105 unsigned int height,
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106 unsigned int pitch,
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107 void *buffer);
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108 };
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109
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110
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111 class PngReader : public ImageAccessor
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112 {
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113 private:
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114 struct PngRabi;
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115
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116 std::vector<uint8_t> data_;
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117
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118 void CheckHeader(const void* header);
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119
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120 void Read(PngRabi& rabi);
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121
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122 public:
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123 PngReader();
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124
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125 void ReadFromFile(const char* filename);
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126
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127 void ReadFromFile(const std::string& filename)
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128 {
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129 ReadFromFile(filename.c_str());
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130 }
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131
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132 void ReadFromMemory(const void* buffer,
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133 size_t size);
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134
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135 void ReadFromMemory(const std::string& buffer);
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136 };
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137 }