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annotate libgui/graphics/GLCanvas.cc @ 27393:efe72866b483

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mark all interpreter_event lambda functions with special comment * Canvas.cc, GLCanvas.cc, file-editor-tab.cc, main-window.cc, octave-qobject.cc, set-path-model.cc: Mark all lambda functions passed to interpreter_event signals with "INTERPRETER THREAD" comments as a reminder that they will be executed in the interpreter thread.
author John W. Eaton <jwe@octave.org>
date Wed, 11 Sep 2019 16:46:54 -0400
parents 50216d7a2f6b
children f844b1f03dcc
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1 /*
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2
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3 Copyright (C) 2011-2019 Michael Goffioul
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4
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5 This file is part of Octave.
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6
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7 Octave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave 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
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15 GNU 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 General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <https://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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26
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27 #include "event-manager.h"
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28 #include "gl-render.h"
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29 #include "gl2ps-print.h"
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30 #include "graphics.h"
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31 #include "interpreter-private.h"
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32
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33 #include "GLCanvas.h"
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34 #include "gl-select.h"
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35
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36 namespace QtHandles
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37 {
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38 #if defined (HAVE_QOPENGLWIDGET)
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39 # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS
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40 #else
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41 # if defined (Q_OS_WIN32)
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42 # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS \
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43 QGLFormat (QGL::SampleBuffers | QGL::AlphaChannel \
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44 | QGL::IndirectRendering),
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45 # else
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46 # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS \
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47 QGLFormat (QGL::SampleBuffers | QGL::AlphaChannel),
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48 # endif
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49 #endif
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50
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51 GLCanvas::GLCanvas (QWidget *xparent, const graphics_handle& gh)
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52 : OCTAVE_QT_OPENGL_WIDGET (OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS xparent),
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53 Canvas (gh), m_glfcns (), m_renderer (m_glfcns)
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54 {
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55 setFocusPolicy (Qt::ClickFocus);
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56 setFocus ();
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57 }
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58
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59 GLCanvas::~GLCanvas (void)
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60 { }
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61
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62 void
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63 GLCanvas::initializeGL (void)
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64 {
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65 m_glfcns.init ();
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66 }
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67
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68 void
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69 GLCanvas::draw (const graphics_handle& gh)
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70 {
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71 gh_manager& gh_mgr = octave::__get_gh_manager__ ("GLCanvas::draw");
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72
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73 octave::autolock guard (gh_mgr.graphics_lock ());
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74
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75 graphics_object go = gh_mgr.get_object (gh);
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76
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77 if (go)
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78 {
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79 graphics_object fig = go.get_ancestor ("figure");
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80 double dpr = fig.get ("__device_pixel_ratio__").double_value ();
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81 m_renderer.set_viewport (dpr * width (), dpr * height ());
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82 m_renderer.set_device_pixel_ratio (dpr);
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83 m_renderer.draw (go);
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84 }
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85 }
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86
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87 uint8NDArray
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88 GLCanvas::do_getPixels (const graphics_handle& gh)
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89 {
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90 uint8NDArray retval;
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91
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92 gh_manager& gh_mgr = octave::__get_gh_manager__ ("GLCanvas::do_getPixels");
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93
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94 graphics_object go = gh_mgr.get_object (gh);
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95
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96 if (go && go.isa ("figure"))
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97 {
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98 Matrix pos = go.get ("position").matrix_value ();
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99 double dpr = go.get ("__device_pixel_ratio__").double_value ();
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100 pos(2) *= dpr;
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101 pos(3) *= dpr;
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102
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103 // Make sure we have a valid current context
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104 if (! begin_rendering ())
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105 return retval;
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106
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107 // When the figure is not visible or its size is frozen for printing,
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108 // we use a framebuffer object to make sure we are rendering on a
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109 // suitably large frame.
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110 if (go.get ("visible").string_value () == "off"
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111 || go.get ("__printing__").string_value () == "on")
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112 {
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113 OCTAVE_QT_OPENGL_FBO
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114 fbo (pos(2), pos(3),
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115 OCTAVE_QT_OPENGL_FBO::Attachment::Depth);
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116
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117 fbo.bind ();
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118
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119 m_renderer.set_viewport (pos(2), pos(3));
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120 m_renderer.set_device_pixel_ratio (dpr);
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121 m_renderer.draw (go);
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122 retval = m_renderer.get_pixels (pos(2), pos(3));
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123
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124 fbo.release ();
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125 }
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126 else
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127 {
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128 m_renderer.set_viewport (pos(2), pos(3));
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129 m_renderer.set_device_pixel_ratio (dpr);
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130 m_renderer.draw (go);
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131 retval = m_renderer.get_pixels (pos(2), pos(3));
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132 }
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133
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134 end_rendering ();
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135 }
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136
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137 return retval;
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138 }
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139
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140 void
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141 GLCanvas::do_print (const QString& file_cmd, const QString& term,
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142 const graphics_handle& handle)
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143 {
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144 gh_manager& gh_mgr = octave::__get_gh_manager__ ("GLCanvas::do_print");
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145
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146 octave::autolock guard (gh_mgr.graphics_lock ());
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147
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148 graphics_object go = gh_mgr.get_object (handle);
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149
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150 if (go.valid_object ())
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151 {
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152 graphics_object fig (go.get_ancestor ("figure"));
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153
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154 // Make sure we have a valid current context
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155 if (! begin_rendering ())
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156 error ("print: no valid OpenGL offscreen context");
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157
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158 try
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159 {
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160 if (fig.get ("visible").string_value () == "on")
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161 octave::gl2ps_print (m_glfcns, fig, file_cmd.toStdString (),
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162 term.toStdString ());
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163 else
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164 {
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165 // When the figure is not visible, we use a framebuffer object
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166 // to make sure we are rendering on a suitably large frame.
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167 Matrix pos = fig.get ("position").matrix_value ();
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168 double dpr = fig.get ("__device_pixel_ratio__").double_value ();
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169 pos(2) *= dpr;
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170 pos(3) *= dpr;
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171
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172 OCTAVE_QT_OPENGL_FBO
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173 fbo (pos(2), pos(3),
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174 OCTAVE_QT_OPENGL_FBO::Attachment::Depth);
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175
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176 fbo.bind ();
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177
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178 octave::gl2ps_print (m_glfcns, fig, file_cmd.toStdString (),
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179 term.toStdString ());
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180
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181 fbo.release ();
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182 }
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183 }
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184 catch (octave::execution_exception& e)
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185 {
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186 emit interpreter_event
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187 ([] (void)
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188 {
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189 // INTERPRETER THREAD
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190
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191 std::rethrow_exception (std::current_exception ());
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192 });
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193 }
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194
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195 end_rendering ();
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196 }
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197 }
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198
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199 graphics_object
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200 GLCanvas::selectFromAxes (const graphics_object& ax, const QPoint& pt)
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201 {
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202 makeCurrent ();
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203
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204 if (ax)
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205 {
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206 octave::opengl_selector s (m_glfcns);
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207
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208 s.set_viewport (width (), height ());
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209 return s.select (ax, pt.x (), height () - pt.y (),
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210 octave::select_ignore_hittest);
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211 }
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212
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213 return graphics_object ();
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214 }
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215
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216 void
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217 GLCanvas::drawZoomBox (const QPoint& p1, const QPoint& p2)
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218 {
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219 Matrix overlaycolor (3, 1);
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220 overlaycolor(0) = 0.45;
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221 overlaycolor(1) = 0.62;
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222 overlaycolor(2) = 0.81;
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223 double overlayalpha = 0.1;
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224 Matrix bordercolor = overlaycolor;
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225 double borderalpha = 0.9;
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226 double borderwidth = 1.5;
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227
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228 m_renderer.draw_zoom_box (width (), height (),
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229 p1.x (), p1.y (), p2.x (), p2.y (),
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230 overlaycolor, overlayalpha,
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231 bordercolor, borderalpha, borderwidth);
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232 }
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233
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234 void
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235 GLCanvas::paintGL (void)
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236 {
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237 canvasPaintEvent ();
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238 }
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239
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diff changeset
240 void
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241 GLCanvas::mouseDoubleClickEvent (QMouseEvent *xevent)
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242 {
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243 canvasMouseDoubleClickEvent (xevent);
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244 }
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245
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246 void
23449
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247 GLCanvas::mouseMoveEvent (QMouseEvent *xevent)
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248 {
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249 canvasMouseMoveEvent (xevent);
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250 }
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251
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252 void
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253 GLCanvas::mousePressEvent (QMouseEvent *xevent)
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254 {
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255 canvasMousePressEvent (xevent);
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256 }
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257
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258 void
23449
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259 GLCanvas::mouseReleaseEvent (QMouseEvent *xevent)
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260 {
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261 canvasMouseReleaseEvent (xevent);
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262 }
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263
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264 void
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265 GLCanvas::wheelEvent (QWheelEvent *xevent)
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266 {
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267 canvasWheelEvent (xevent);
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268 }
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269
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270 void
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271 GLCanvas::keyPressEvent (QKeyEvent *xevent)
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272 {
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273 if (! canvasKeyPressEvent (xevent))
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274 OCTAVE_QT_OPENGL_WIDGET::keyPressEvent (xevent);
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275 }
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276
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277 void
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278 GLCanvas::keyReleaseEvent (QKeyEvent *xevent)
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279 {
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280 if (! canvasKeyReleaseEvent (xevent))
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281 OCTAVE_QT_OPENGL_WIDGET::keyReleaseEvent (xevent);
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282 }
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283
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284 bool
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285 GLCanvas::begin_rendering (void)
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286 {
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287 bool retval = true;
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288
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289 if (! isValid ())
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290 {
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291 # if defined (HAVE_QT_OFFSCREEN)
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292 static bool os_ctx_ok = true;
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293 if (os_ctx_ok && ! m_os_context.isValid ())
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294 {
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295 // Try to initialize offscreen context
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296 m_os_surface.create ();
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297 if (! m_os_context.create ())
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298 {
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299 os_ctx_ok = false;
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300 return false;
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301 }
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302 }
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303
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304 retval = m_os_context.makeCurrent (&m_os_surface);
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305 # else
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306 retval = false;
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307 # endif
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308 }
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309 else
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310 makeCurrent ();
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311
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312 return retval;
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313 }
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314
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315 void
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316 GLCanvas::end_rendering (void)
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317 {
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318 doneCurrent ();
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319 }
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320 }