annotate Framework/Viewport/CairoSurface.cpp @ 40:7207a407bcd8

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 04 Jan 2017 16:37:42 +0100
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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 Osimis, 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 General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "CairoSurface.h"
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35
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36 #include "../../Resources/Orthanc/Core/Logging.h"
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37 #include "../../Resources/Orthanc/Core/OrthancException.h"
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38 #include "../../Resources/Orthanc/Core/Images/ImageProcessing.h"
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39
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40 namespace OrthancStone
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41 {
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42 void CairoSurface::Release()
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43 {
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44 if (surface_)
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45 {
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46 cairo_surface_destroy(surface_);
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47 surface_ = NULL;
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48 }
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49 }
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51
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52 void CairoSurface::Allocate(unsigned int width,
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53 unsigned int height)
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54 {
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55 Release();
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56
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57 surface_ = cairo_image_surface_create(CAIRO_FORMAT_RGB24, width, height);
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58 if (!surface_)
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59 {
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60 // Should never occur
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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 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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65 {
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66 LOG(ERROR) << "Cannot create a Cairo surface";
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67 cairo_surface_destroy(surface_);
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68 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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69 }
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70
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71 width_ = width;
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72 height_ = height;
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73 pitch_ = cairo_image_surface_get_stride(surface_);
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74 buffer_ = cairo_image_surface_get_data(surface_);
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75 }
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78 CairoSurface::CairoSurface(Orthanc::ImageAccessor& accessor)
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79 {
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80 if (accessor.GetFormat() != Orthanc::PixelFormat_BGRA32)
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81 {
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82 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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83 }
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84
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85 width_ = accessor.GetWidth();
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86 height_ = accessor.GetHeight();
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87 pitch_ = accessor.GetPitch();
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88 buffer_ = accessor.GetBuffer();
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89
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90 surface_ = cairo_image_surface_create_for_data
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91 (reinterpret_cast<unsigned char*>(buffer_), CAIRO_FORMAT_RGB24, width_, height_, pitch_);
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92 if (!surface_)
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93 {
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94 // Should never occur
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95 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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96 }
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97
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98 if (cairo_surface_status(surface_) != CAIRO_STATUS_SUCCESS)
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99 {
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100 LOG(ERROR) << "Bad pitch for a Cairo surface";
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101 cairo_surface_destroy(surface_);
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102 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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103 }
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104 }
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105
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106
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107 void CairoSurface::SetSize(unsigned int width,
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108 unsigned int height)
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109 {
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110 if (width_ != width ||
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111 height_ != height)
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112 {
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113 Allocate(width, height);
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114 }
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115 }
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116
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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 Orthanc::ImageAccessor source = other.GetConstAccessor();
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121 Orthanc::ImageAccessor target = GetAccessor();
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122 Orthanc::ImageProcessing::Copy(target, source);
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123 }
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124
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125
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126 Orthanc::ImageAccessor CairoSurface::GetConstAccessor() const
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127 {
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128 Orthanc::ImageAccessor accessor;
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129 accessor.AssignReadOnly(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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130 return accessor;
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131 }
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132
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133
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134 Orthanc::ImageAccessor CairoSurface::GetAccessor()
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135 {
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136 Orthanc::ImageAccessor accessor;
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137 accessor.AssignWritable(Orthanc::PixelFormat_BGRA32, width_, height_, pitch_, buffer_);
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138 return accessor;
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139 }
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140 }