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annotate Framework/Wrappers/CairoSurface.cpp @ 888:6e888cf6a48b

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renderers now have access to canvas width/height
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 10 Jul 2019 11:58:38 +0200
parents c237e0625065
children 2d8ab34c8c91
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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) 2017-2019 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 Affero 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 * Affero 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 Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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22 #include "CairoSurface.h"
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23
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24 #include <Core/Logging.h>
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25 #include <Core/OrthancException.h>
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26 #include <Core/Images/ImageProcessing.h>
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28 namespace OrthancStone
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29 {
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30 void CairoSurface::Release()
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31 {
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32 if (surface_)
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33 {
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34 cairo_surface_destroy(surface_);
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35 surface_ = NULL;
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36 }
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37 }
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40 void CairoSurface::Allocate(unsigned int width,
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41 unsigned int height,
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42 bool hasAlpha)
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43 {
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44 Release();
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45
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46 hasAlpha_ = hasAlpha;
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47
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48 surface_ = cairo_image_surface_create
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49 (hasAlpha ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24, width, height);
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50 if (!surface_)
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51 {
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52 // Should never occur
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53 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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54 }
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55
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56 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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57 {
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58 LOG(ERROR) << "Cannot create a Cairo surface";
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59 cairo_surface_destroy(surface_);
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60 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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61 }
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62
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63 width_ = width;
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64 height_ = height;
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65 pitch_ = cairo_image_surface_get_stride(surface_);
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66 buffer_ = cairo_image_surface_get_data(surface_);
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67 }
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69
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70 CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor,
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71 bool hasAlpha) :
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72 hasAlpha_(hasAlpha)
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73 {
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74 if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32)
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75 {
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76 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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77 }
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78
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79 width_ = accessor.GetWidth();
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80 height_ = accessor.GetHeight();
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81 pitch_ = accessor.GetPitch();
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82 buffer_ = accessor.GetBuffer();
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83
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84 surface_ = cairo_image_surface_create_for_data
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85 (reinterpret_cast<unsigned char*>(buffer_),
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86 hasAlpha_ ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24,
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87 width_, height_, pitch_);
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88 if (!surface_)
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89 {
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90 // Should never occur
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91 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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92 }
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93
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94 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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95 {
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96 LOG(ERROR) << "Bad pitch for a Cairo surface";
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97 cairo_surface_destroy(surface_);
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98 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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99 }
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100 }
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101
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102
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103 void CairoSurface::SetSize(unsigned int width,
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104 unsigned int height,
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105 bool hasAlpha)
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106 {
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107 if (hasAlpha_ != hasAlpha ||
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108 width_ != width ||
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109 height_ != height)
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110 {
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111 Allocate(width, height, hasAlpha);
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112 }
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113 }
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115
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116 void CairoSurface::Copy(const CairoSurface& other)
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117 {
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118 SetSize(other.GetWidth(), other.GetHeight(), other.HasAlpha());
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119
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120 Orthanc::ImageAccessor source, target;
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121
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122 other.GetReadOnlyAccessor(source);
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123 GetWriteableAccessor(target);
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124
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125 Orthanc::ImageProcessing::Copy(target, source);
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126
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127 cairo_surface_mark_dirty(surface_);
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128 }
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129
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130
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131 void CairoSurface::Copy(const Orthanc::ImageAccessor& source,
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132 bool hasAlpha)
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133 {
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134 SetSize(source.GetWidth(), source.GetHeight(), hasAlpha);
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135
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136 Orthanc::ImageAccessor target;
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137 GetWriteableAccessor(target);
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138
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139 Orthanc::ImageProcessing::Convert(target, source);
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140
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141 cairo_surface_mark_dirty(surface_);
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142 }
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143
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144
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145 void CairoSurface::GetReadOnlyAccessor(Orthanc::ImageAccessor& target) const
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146 {
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147 target.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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148 }
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151 void CairoSurface::GetWriteableAccessor(Orthanc::ImageAccessor& target)
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152 {
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153 target.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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154 }
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155 }