annotate OrthancFramework/Sources/Images/ImageBuffer.cpp @ 4780:ebb801d44e06

optimization in ImageProcessing::ShiftScale()
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 30 Aug 2021 12:13:05 +0200
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children 7053502fbf97
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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 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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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.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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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/>.
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20 **/
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21
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22
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23 #include "../PrecompiledHeaders.h"
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24 #include "ImageBuffer.h"
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25
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26 #include "../OrthancException.h"
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27
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28 #include <boost/lexical_cast.hpp>
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 namespace Orthanc
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33 {
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34 void ImageBuffer::Allocate()
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35 {
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36 if (changed_)
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37 {
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38 Deallocate();
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39
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40 /*
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41 if (forceMinimalPitch_)
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42 {
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43 TODO: Align pitch and memory buffer to optimal size for SIMD.
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44 }
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45 */
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46
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47 pitch_ = GetBytesPerPixel() * width_;
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48 size_t size = pitch_ * height_;
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49
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50 if (size == 0)
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51 {
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52 buffer_ = NULL;
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53 }
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54 else
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55 {
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56 buffer_ = malloc(size);
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57 if (buffer_ == NULL)
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58 {
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59 throw OrthancException(ErrorCode_NotEnoughMemory,
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60 "Failed to allocate an image buffer of size " + boost::lexical_cast<std::string>(width_) + "x" + boost::lexical_cast<std::string>(height_));
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61 }
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62 }
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63
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64 changed_ = false;
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65 }
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66 }
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67
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68
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69 void ImageBuffer::Deallocate()
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70 {
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71 if (buffer_ != NULL)
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72 {
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73 free(buffer_);
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74 buffer_ = NULL;
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75 changed_ = true;
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76 }
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77 }
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78
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79
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80 ImageBuffer::ImageBuffer(PixelFormat format,
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81 unsigned int width,
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82 unsigned int height,
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83 bool forceMinimalPitch) :
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84 forceMinimalPitch_(forceMinimalPitch)
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85 {
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86 Initialize();
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87 SetWidth(width);
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88 SetHeight(height);
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89 SetFormat(format);
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90 }
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91
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92 ImageBuffer::ImageBuffer()
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93 {
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94 Initialize();
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95 }
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96
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97 ImageBuffer::~ImageBuffer()
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98 {
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99 Deallocate();
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100 }
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101
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102 PixelFormat ImageBuffer::GetFormat() const
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103 {
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104 return format_;
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105 }
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106
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107
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108 void ImageBuffer::Initialize()
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109 {
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110 changed_ = false;
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111 forceMinimalPitch_ = true;
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112 format_ = PixelFormat_Grayscale8;
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113 width_ = 0;
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114 height_ = 0;
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115 pitch_ = 0;
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116 buffer_ = NULL;
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117 }
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118
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119
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120 void ImageBuffer::SetFormat(PixelFormat format)
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121 {
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122 if (format != format_)
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123 {
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124 changed_ = true;
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125 format_ = format;
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126 }
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127 }
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128
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129 unsigned int ImageBuffer::GetWidth() const
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130 {
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131 return width_;
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132 }
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133
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134
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135 void ImageBuffer::SetWidth(unsigned int width)
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136 {
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137 if (width != width_)
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138 {
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139 changed_ = true;
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140 width_ = width;
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141 }
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142 }
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143
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144 unsigned int ImageBuffer::GetHeight() const
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145 {
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146 return height_;
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147 }
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148
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149
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150 void ImageBuffer::SetHeight(unsigned int height)
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151 {
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152 if (height != height_)
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153 {
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154 changed_ = true;
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155 height_ = height;
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156 }
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157 }
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158
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159 unsigned int ImageBuffer::GetBytesPerPixel() const
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160 {
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161 return ::Orthanc::GetBytesPerPixel(format_);
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162 }
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163
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164
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165 void ImageBuffer::GetReadOnlyAccessor(ImageAccessor& accessor)
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166 {
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167 Allocate();
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168 accessor.AssignReadOnly(format_, width_, height_, pitch_, buffer_);
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169 }
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170
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171
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172 void ImageBuffer::GetWriteableAccessor(ImageAccessor& accessor)
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173 {
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174 Allocate();
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175 accessor.AssignWritable(format_, width_, height_, pitch_, buffer_);
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176 }
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177
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178 bool ImageBuffer::IsMinimalPitchForced() const
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179 {
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180 return forceMinimalPitch_;
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181 }
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182
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183
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184 void ImageBuffer::AcquireOwnership(ImageBuffer& other)
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185 {
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186 // Remove the content of the current image
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187 Deallocate();
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188
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189 // Force the allocation of the other image (if not already
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190 // allocated)
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191 other.Allocate();
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192
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193 // Transfer the content of the other image
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194 changed_ = false;
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195 forceMinimalPitch_ = other.forceMinimalPitch_;
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196 format_ = other.format_;
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197 width_ = other.width_;
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198 height_ = other.height_;
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199 pitch_ = other.pitch_;
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200 buffer_ = other.buffer_;
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201
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202 // Force the reinitialization of the other image
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203 other.Initialize();
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204 }
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205 }