Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/Wrappers/CairoSurface.cpp @ 1739:9ac2a65d4172

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:50:00 +0100
parents 8563ea5d8ae4
children 3889ae96d2e9
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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
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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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28956ed68280 agpl 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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22
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23 #include "CairoSurface.h"
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24
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25 #include <Logging.h>
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26 #include <OrthancException.h>
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27 #include <Images/ImageProcessing.h>
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29 namespace OrthancStone
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30 {
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31 void CairoSurface::Release()
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32 {
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33 if (surface_)
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34 {
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35 cairo_surface_destroy(surface_);
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36 surface_ = NULL;
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37 }
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38 }
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41 void CairoSurface::Allocate(unsigned int width,
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42 unsigned int height,
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43 bool hasAlpha)
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44 {
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45 Release();
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46
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47 hasAlpha_ = hasAlpha;
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48
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49 surface_ = cairo_image_surface_create
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50 (hasAlpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, width, height);
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51 if (!surface_)
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52 {
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53 // Should never occur
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54 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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55 }
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56
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57 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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58 {
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59 LOG(ERROR) << "Cannot create a Cairo surface";
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60 cairo_surface_destroy(surface_);
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61 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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62 }
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63
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64 width_ = width;
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65 height_ = height;
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66 pitch_ = cairo_image_surface_get_stride(surface_);
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67 buffer_ = cairo_image_surface_get_data(surface_);
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68 }
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70
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71 CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor,
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72 bool hasAlpha) :
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73 hasAlpha_(hasAlpha)
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74 {
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75 if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32)
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76 {
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77 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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78 }
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79
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80 width_ = accessor.GetWidth();
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81 height_ = accessor.GetHeight();
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82 pitch_ = accessor.GetPitch();
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83 buffer_ = accessor.GetBuffer();
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84
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85 surface_ = cairo_image_surface_create_for_data
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86 (reinterpret_cast<unsigned char*>(buffer_),
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87 hasAlpha_ ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
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88 width_, height_, pitch_);
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89 if (!surface_)
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90 {
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91 // Should never occur
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92 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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93 }
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94
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95 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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96 {
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97 LOG(ERROR) << "Bad pitch for a Cairo surface";
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98 cairo_surface_destroy(surface_);
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99 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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100 }
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101 }
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102
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103
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104 void CairoSurface::SetSize(unsigned int width,
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105 unsigned int height,
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106 bool hasAlpha)
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107 {
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108 if (hasAlpha_ != hasAlpha ||
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109 width_ != width ||
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110 height_ != height)
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111 {
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112 Allocate(width, height, hasAlpha);
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113 }
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114 }
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116
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117 void CairoSurface::Copy(const CairoSurface& other)
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118 {
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119 SetSize(other.GetWidth(), other.GetHeight(), other.HasAlpha());
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120
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121 Orthanc::ImageAccessor source, target;
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122
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123 other.GetReadOnlyAccessor(source);
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124 GetWriteableAccessor(target);
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125
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126 Orthanc::ImageProcessing::Copy(target, source);
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127
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128 cairo_surface_mark_dirty(surface_);
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129 }
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131
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132 void CairoSurface::Copy(const Orthanc::ImageAccessor& source,
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133 bool hasAlpha)
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134 {
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135 SetSize(source.GetWidth(), source.GetHeight(), hasAlpha);
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136
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137 Orthanc::ImageAccessor target;
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138 GetWriteableAccessor(target);
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139
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140 Orthanc::ImageProcessing::Convert(target, source);
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141
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142 cairo_surface_mark_dirty(surface_);
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143 }
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144
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145
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146 void CairoSurface::GetReadOnlyAccessor(Orthanc::ImageAccessor& target) const
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148 target.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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150
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152 void CairoSurface::GetWriteableAccessor(Orthanc::ImageAccessor& target)
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154 target.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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155 }
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156 }