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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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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 *
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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 #include "../PrecompiledHeaders.h"
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34 #include "ImageBuffer.h"
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35
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36 #include "../OrthancException.h"
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37
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38 #include <stdio.h>
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39 #include <stdlib.h>
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40
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41 namespace Orthanc
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42 {
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43 void ImageBuffer::Allocate()
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44 {
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45 if (changed_)
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46 {
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47 Deallocate();
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48
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49 /*
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50 if (forceMinimalPitch_)
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51 {
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52 TODO: Align pitch and memory buffer to optimal size for SIMD.
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53 }
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54 */
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55
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56 pitch_ = GetBytesPerPixel() * width_;
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57 size_t size = pitch_ * height_;
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58
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59 if (size == 0)
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60 {
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61 buffer_ = NULL;
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62 }
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63 else
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64 {
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65 buffer_ = malloc(size);
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66 if (buffer_ == NULL)
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67 {
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68 throw OrthancException(ErrorCode_NotEnoughMemory);
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69 }
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70 }
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71
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72 changed_ = false;
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73 }
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74 }
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75
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76
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77 void ImageBuffer::Deallocate()
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78 {
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79 if (buffer_ != NULL)
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80 {
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81 free(buffer_);
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82 buffer_ = NULL;
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83 changed_ = true;
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84 }
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85 }
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86
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87
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88 ImageBuffer::ImageBuffer(PixelFormat format,
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89 unsigned int width,
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90 unsigned int height,
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91 bool forceMinimalPitch) :
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92 forceMinimalPitch_(forceMinimalPitch)
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93 {
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94 Initialize();
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95 SetWidth(width);
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96 SetHeight(height);
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97 SetFormat(format);
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98 }
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99
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100
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101 void ImageBuffer::Initialize()
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102 {
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103 changed_ = false;
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104 forceMinimalPitch_ = true;
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105 format_ = PixelFormat_Grayscale8;
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106 width_ = 0;
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107 height_ = 0;
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108 pitch_ = 0;
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109 buffer_ = NULL;
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110 }
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111
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112
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113 void ImageBuffer::SetFormat(PixelFormat format)
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114 {
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115 if (format != format_)
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116 {
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117 changed_ = true;
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118 format_ = format;
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119 }
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120 }
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121
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122
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123 void ImageBuffer::SetWidth(unsigned int width)
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124 {
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125 if (width != width_)
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126 {
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127 changed_ = true;
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128 width_ = width;
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129 }
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130 }
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131
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132
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133 void ImageBuffer::SetHeight(unsigned int height)
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134 {
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135 if (height != height_)
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136 {
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137 changed_ = true;
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138 height_ = height;
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139 }
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140 }
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141
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142
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143 ImageAccessor ImageBuffer::GetAccessor()
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144 {
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145 Allocate();
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146
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147 ImageAccessor accessor;
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148 accessor.AssignWritable(format_, width_, height_, pitch_, buffer_);
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149 return accessor;
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150 }
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151
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152
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153 ImageAccessor ImageBuffer::GetConstAccessor()
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154 {
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155 Allocate();
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156
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157 ImageAccessor accessor;
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158 accessor.AssignReadOnly(format_, width_, height_, pitch_, buffer_);
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159 return accessor;
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160 }
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161
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162
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163 void ImageBuffer::AcquireOwnership(ImageBuffer& other)
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164 {
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165 // Remove the content of the current image
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166 Deallocate();
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167
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168 // Force the allocation of the other image (if not already
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169 // allocated)
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170 other.Allocate();
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171
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172 // Transfer the content of the other image
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173 changed_ = false;
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174 forceMinimalPitch_ = other.forceMinimalPitch_;
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175 format_ = other.format_;
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176 width_ = other.width_;
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177 height_ = other.height_;
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178 pitch_ = other.pitch_;
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179 buffer_ = other.buffer_;
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180
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181 // Force the reinitialization of the other image
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182 other.Initialize();
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183 }
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184 }
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