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annotate OrthancStone/Sources/Wrappers/CairoSurface.cpp @ 1999:709b90ae0f89

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 02 Nov 2022 13:44:13 +0100
parents 7053b8a0aaec
children 07964689cb0b
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
1871
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "CairoSurface.h"
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25
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26 #include <Logging.h>
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27 #include <OrthancException.h>
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28 #include <Images/ImageProcessing.h>
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30 namespace OrthancStone
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31 {
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32 void CairoSurface::Release()
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33 {
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34 if (surface_)
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35 {
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36 cairo_surface_destroy(surface_);
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37 surface_ = NULL;
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38 }
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39 }
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42 void CairoSurface::Allocate(unsigned int width,
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43 unsigned int height,
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44 bool hasAlpha)
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45 {
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46 Release();
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47
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48 hasAlpha_ = hasAlpha;
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49
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50 surface_ = cairo_image_surface_create
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51 (hasAlpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, width, height);
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52 if (!surface_)
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53 {
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54 // Should never occur
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55 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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56 }
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57
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58 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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59 {
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60 LOG(ERROR) << "Cannot create a Cairo surface";
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61 cairo_surface_destroy(surface_);
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62 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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63 }
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64
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65 width_ = width;
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66 height_ = height;
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67 pitch_ = cairo_image_surface_get_stride(surface_);
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68 buffer_ = cairo_image_surface_get_data(surface_);
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69 }
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71
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72 CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor,
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73 bool hasAlpha) :
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74 hasAlpha_(hasAlpha)
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75 {
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76 if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32)
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77 {
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78 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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79 }
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80
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81 width_ = accessor.GetWidth();
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82 height_ = accessor.GetHeight();
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83 pitch_ = accessor.GetPitch();
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84 buffer_ = accessor.GetBuffer();
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85
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86 surface_ = cairo_image_surface_create_for_data
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87 (reinterpret_cast<unsigned char*>(buffer_),
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88 hasAlpha_ ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
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89 width_, height_, pitch_);
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90 if (!surface_)
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91 {
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92 // Should never occur
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93 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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94 }
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95
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96 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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97 {
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98 LOG(ERROR) << "Bad pitch for a Cairo surface";
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99 cairo_surface_destroy(surface_);
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100 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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101 }
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102 }
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103
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104
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105 void CairoSurface::SetSize(unsigned int width,
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106 unsigned int height,
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107 bool hasAlpha)
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108 {
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109 if (hasAlpha_ != hasAlpha ||
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110 width_ != width ||
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111 height_ != height)
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112 {
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113 Allocate(width, height, hasAlpha);
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114 }
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115 }
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117
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118 void CairoSurface::Copy(const CairoSurface& other)
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119 {
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120 SetSize(other.GetWidth(), other.GetHeight(), other.HasAlpha());
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121
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122 Orthanc::ImageAccessor source, target;
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123
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124 other.GetReadOnlyAccessor(source);
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125 GetWriteableAccessor(target);
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126
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127 Orthanc::ImageProcessing::Copy(target, source);
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128
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129 cairo_surface_mark_dirty(surface_);
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130 }
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131
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132
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133 void CairoSurface::Copy(const Orthanc::ImageAccessor& source,
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134 bool hasAlpha)
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135 {
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136 SetSize(source.GetWidth(), source.GetHeight(), hasAlpha);
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137
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138 Orthanc::ImageAccessor target;
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139 GetWriteableAccessor(target);
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140
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141 Orthanc::ImageProcessing::Convert(target, source);
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142
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143 cairo_surface_mark_dirty(surface_);
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144 }
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145
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147 void CairoSurface::GetReadOnlyAccessor(Orthanc::ImageAccessor& target) const
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149 target.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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150 }
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153 void CairoSurface::GetWriteableAccessor(Orthanc::ImageAccessor& target)
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155 target.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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156 }
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157 }