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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 *
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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 "CairoSurface.h"
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34
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35 #include "../Orthanc/Core/Logging.h"
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36 #include "../Orthanc/Core/OrthancException.h"
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37 #include "../Orthanc/Core/Images/ImageProcessing.h"
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38
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39 namespace OrthancStone
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40 {
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41 void CairoSurface::Release()
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42 {
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43 if (surface_)
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44 {
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45 cairo_surface_destroy(surface_);
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46 surface_ = NULL;
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47 }
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48 }
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49
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50
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51 void CairoSurface::Allocate(unsigned int width,
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52 unsigned int height)
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53 {
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54 Release();
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55
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56 surface_ = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
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57 if (!surface_)
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58 {
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59 // Should never occur
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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 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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64 {
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65 LOG(ERROR) << "Cannot create a Cairo surface";
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66 cairo_surface_destroy(surface_);
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67 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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68 }
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69
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70 width_ = width;
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71 height_ = height;
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72 pitch_ = cairo_image_surface_get_stride(surface_);
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73 buffer_ = cairo_image_surface_get_data(surface_);
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74 }
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75
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76
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77 CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor)
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78 {
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79 if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32)
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80 {
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81 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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82 }
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83
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84 width_ = accessor.GetWidth();
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85 height_ = accessor.GetHeight();
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86 pitch_ = accessor.GetPitch();
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87 buffer_ = accessor.GetBuffer();
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88
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89 surface_ = cairo_image_surface_create_for_data
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90 (reinterpret_cast<unsigned char*>(buffer_), CAIRO_FORMAT_RGB24, width_, height_, pitch_);
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91 if (!surface_)
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92 {
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93 // Should never occur
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94 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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95 }
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96
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97 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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98 {
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99 LOG(ERROR) << "Bad pitch for a Cairo surface";
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100 cairo_surface_destroy(surface_);
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101 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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102 }
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103 }
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104
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105
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106 void CairoSurface::SetSize(unsigned int width,
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107 unsigned int height)
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108 {
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109 if (width_ != width ||
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110 height_ != height)
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111 {
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112 Allocate(width, height);
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113 }
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114 }
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115
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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 Orthanc::ImageAccessor source = other.GetConstAccessor();
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120 Orthanc::ImageAccessor target = GetAccessor();
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121 Orthanc::ImageProcessing::Copy(target, source);
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122 }
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123
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124
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125 Orthanc::ImageAccessor CairoSurface::GetConstAccessor() const
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126 {
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127 Orthanc::ImageAccessor accessor;
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128 accessor.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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129 return accessor;
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130 }
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131
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132
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133 Orthanc::ImageAccessor CairoSurface::GetAccessor()
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134 {
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135 Orthanc::ImageAccessor accessor;
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136 accessor.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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137 return accessor;
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138 }
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139 }
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