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annotate libgui/graphics/GLCanvas.cc @ 31649:deb553ac2c54

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maint: Merge stable to default.
author John W. Eaton <jwe@octave.org>
date Tue, 06 Dec 2022 15:45:27 -0500
parents 431f80aba37a 29d734430e5f
children 5f11de0e7440
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2011-2022 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if defined (HAVE_CONFIG_H)
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27 # include "config.h"
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28 #endif
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29
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30 #include "GLCanvas.h"
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31 #include "gl-select.h"
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32
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33 #include "gl-render.h"
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34 #include "gl2ps-print.h"
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35 #include "graphics.h"
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36 #include "interpreter.h"
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37
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38 OCTAVE_BEGIN_NAMESPACE(octave)
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39
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40 #if defined (HAVE_QOPENGLWIDGET)
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41 # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS
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42 #else
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43 # if defined (Q_OS_WIN32)
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44 # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS \
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45 QGLFormat (QGL::SampleBuffers | QGL::AlphaChannel \
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46 | QGL::IndirectRendering),
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47 # else
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48 # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS \
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49 QGLFormat (QGL::SampleBuffers | QGL::AlphaChannel),
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50 # endif
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51 #endif
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52
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53 GLCanvas::GLCanvas (octave::interpreter& interp,
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54 const graphics_handle& gh, QWidget *xparent)
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55 : OCTAVE_QT_OPENGL_WIDGET (OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS xparent),
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56 Canvas (interp, gh), m_glfcns (), m_renderer (m_glfcns)
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57 {
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58 setFocusPolicy (Qt::ClickFocus);
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59 setFocus ();
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60 }
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61
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62 GLCanvas::~GLCanvas (void)
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63 { }
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64
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65 void
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66 GLCanvas::initializeGL (void)
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67 {
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68 m_glfcns.init ();
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69 }
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70
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71 void
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72 GLCanvas::draw (const graphics_handle& gh)
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73 {
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74 gh_manager& gh_mgr = m_interpreter.get_gh_manager ();
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75
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76 octave::autolock guard (gh_mgr.graphics_lock ());
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77
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78 graphics_object go = gh_mgr.get_object (gh);
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79
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80 if (go)
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81 {
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82 graphics_object fig = go.get_ancestor ("figure");
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83 double dpr = fig.get ("__device_pixel_ratio__").double_value ();
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84 m_renderer.set_viewport (dpr * width (), dpr * height ());
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85 m_renderer.set_device_pixel_ratio (dpr);
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86 m_renderer.draw (go);
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87 }
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88 }
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89
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90 uint8NDArray
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91 GLCanvas::do_getPixels (const graphics_handle& gh)
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92 {
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93 uint8NDArray retval;
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94
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95 gh_manager& gh_mgr = m_interpreter.get_gh_manager ();
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96
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97 graphics_object go = gh_mgr.get_object (gh);
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98
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99 if (go && go.isa ("figure"))
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100 {
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101 Matrix pos = go.get ("position").matrix_value ();
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102 double dpr = go.get ("__device_pixel_ratio__").double_value ();
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103 pos(2) *= dpr;
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104 pos(3) *= dpr;
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105
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106 // Make sure we have a valid current context
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107 if (! begin_rendering ())
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108 return retval;
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109
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110 // When the figure is not visible or its size is frozen for printing,
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111 // we use a framebuffer object to make sure we are rendering on a
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112 // suitably large frame.
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113 if (go.get ("visible").string_value () == "off"
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114 || go.get ("__printing__").string_value () == "on")
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115 {
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116 OCTAVE_QT_OPENGL_FBO
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117 fbo (pos(2), pos(3),
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118 OCTAVE_QT_OPENGL_FBO::Attachment::Depth);
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119
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120 fbo.bind ();
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121
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122 m_renderer.set_viewport (pos(2), pos(3));
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123 m_renderer.set_device_pixel_ratio (dpr);
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124 m_renderer.draw (go);
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125 retval = m_renderer.get_pixels (pos(2), pos(3));
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126
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127 fbo.release ();
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128 }
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129 else
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130 {
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131 m_renderer.set_viewport (pos(2), pos(3));
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8d2b3e3ff182 print.m: Implement "-opengl", "-painters" and "-RGBImage" options (bug #52866)
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132 m_renderer.set_device_pixel_ratio (dpr);
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133 m_renderer.draw (go);
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134 retval = m_renderer.get_pixels (pos(2), pos(3));
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135 }
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136
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diff changeset
137 end_rendering ();
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138 }
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139
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140 return retval;
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141 }
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142
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143 void
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144 GLCanvas::do_print (const QString& file_cmd, const QString& term,
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145 const graphics_handle& handle)
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146 {
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147 gh_manager& gh_mgr = m_interpreter.get_gh_manager ();
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148
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149 octave::autolock guard (gh_mgr.graphics_lock ());
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150
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151 graphics_object go = gh_mgr.get_object (handle);
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152
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153 if (go.valid_object ())
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154 {
27168
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155 graphics_object fig (go.get_ancestor ("figure"));
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156
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157 // Make sure we have a valid current context
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158 if (! begin_rendering ())
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159 error ("print: no valid OpenGL offscreen context");
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160
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161 try
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162 {
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163 if (fig.get ("visible").string_value () == "on")
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164 octave::gl2ps_print (m_glfcns, fig, file_cmd.toStdString (),
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165 term.toStdString ());
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166 else
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167 {
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168 // When the figure is not visible, we use a framebuffer object
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169 // to make sure we are rendering on a suitably large frame.
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170 Matrix pos = fig.get ("position").matrix_value ();
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171 double dpr = fig.get ("__device_pixel_ratio__").double_value ();
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172 pos(2) *= dpr;
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173 pos(3) *= dpr;
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174
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diff changeset
175 OCTAVE_QT_OPENGL_FBO
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176 fbo (pos(2), pos(3),
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177 OCTAVE_QT_OPENGL_FBO::Attachment::Depth);
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178
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179 fbo.bind ();
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180
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diff changeset
181 octave::gl2ps_print (m_glfcns, fig, file_cmd.toStdString (),
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182 term.toStdString ());
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183
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184 fbo.release ();
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185 }
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186 }
27481
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diff changeset
187 catch (octave::execution_exception& ee)
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188 {
27303
07b330708e3c use Qt signals for interpreter callbacks in Qt graphics toolkit
John W. Eaton <jwe@octave.org>
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diff changeset
189 emit interpreter_event
28851
1ac5a76ae91d use [=] capture default specification where possible
John W. Eaton <jwe@octave.org>
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diff changeset
190 ([=] (void)
27302
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diff changeset
191 {
27393
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192 // INTERPRETER THREAD
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193 throw ee;
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diff changeset
194 });
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195 }
26617
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196
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diff changeset
197 end_rendering ();
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198 }
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199 }
23535
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diff changeset
200
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201 graphics_object
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202 GLCanvas::selectFromAxes (const graphics_object& ax, const QPoint& pt)
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203 {
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diff changeset
204 makeCurrent ();
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205
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diff changeset
206 if (ax)
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diff changeset
207 {
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diff changeset
208 octave::opengl_selector s (m_glfcns);
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209
25889
2da65009cc7f Fix graphics object selection on high resolution screens (bug #49053)
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diff changeset
210 s.set_viewport (width (), height ());
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diff changeset
211 return s.select (ax, pt.x (), height () - pt.y (),
24636
9d01ce02d5cb Make selection and "HitTest" compatible with Matlab (bug #52795).
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diff changeset
212 octave::select_ignore_hittest);
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diff changeset
213 }
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214
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215 return graphics_object ();
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216 }
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217
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diff changeset
218 void
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219 GLCanvas::drawZoomBox (const QPoint& p1, const QPoint& p2)
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diff changeset
220 {
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diff changeset
221 Matrix overlaycolor (3, 1);
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diff changeset
222 overlaycolor(0) = 0.45;
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diff changeset
223 overlaycolor(1) = 0.62;
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diff changeset
224 overlaycolor(2) = 0.81;
8a6bf76abf31 eliminate some duplicate OpenGL drawing code
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diff changeset
225 double overlayalpha = 0.1;
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diff changeset
226 Matrix bordercolor = overlaycolor;
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diff changeset
227 double borderalpha = 0.9;
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diff changeset
228 double borderwidth = 1.5;
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229
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diff changeset
230 m_renderer.draw_zoom_box (width (), height (),
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diff changeset
231 p1.x (), p1.y (), p2.x (), p2.y (),
8a6bf76abf31 eliminate some duplicate OpenGL drawing code
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diff changeset
232 overlaycolor, overlayalpha,
8a6bf76abf31 eliminate some duplicate OpenGL drawing code
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diff changeset
233 bordercolor, borderalpha, borderwidth);
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diff changeset
234 }
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diff changeset
235
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236 void
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diff changeset
237 GLCanvas::paintGL (void)
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238 {
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diff changeset
239 canvasPaintEvent ();
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diff changeset
240 }
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241
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diff changeset
242 void
23449
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243 GLCanvas::mouseDoubleClickEvent (QMouseEvent *xevent)
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244 {
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diff changeset
245 canvasMouseDoubleClickEvent (xevent);
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diff changeset
246 }
19663
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diff changeset
247
22411
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diff changeset
248 void
23449
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249 GLCanvas::mouseMoveEvent (QMouseEvent *xevent)
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diff changeset
250 {
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diff changeset
251 canvasMouseMoveEvent (xevent);
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diff changeset
252 }
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253
22411
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diff changeset
254 void
23449
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diff changeset
255 GLCanvas::mousePressEvent (QMouseEvent *xevent)
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diff changeset
256 {
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diff changeset
257 canvasMousePressEvent (xevent);
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diff changeset
258 }
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259
22411
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diff changeset
260 void
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261 GLCanvas::mouseReleaseEvent (QMouseEvent *xevent)
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262 {
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263 canvasMouseReleaseEvent (xevent);
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264 }
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265
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266 void
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267 GLCanvas::wheelEvent (QWheelEvent *xevent)
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268 {
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269 canvasWheelEvent (xevent);
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270 }
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271
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272 void
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273 GLCanvas::keyPressEvent (QKeyEvent *xevent)
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274 {
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275 if (! canvasKeyPressEvent (xevent))
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276 OCTAVE_QT_OPENGL_WIDGET::keyPressEvent (xevent);
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277 }
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278
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279 void
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280 GLCanvas::keyReleaseEvent (QKeyEvent *xevent)
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281 {
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282 if (! canvasKeyReleaseEvent (xevent))
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283 OCTAVE_QT_OPENGL_WIDGET::keyReleaseEvent (xevent);
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284 }
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285
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286 bool
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287 GLCanvas::begin_rendering (void)
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288 {
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289 bool retval = true;
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290
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291 if (! isValid ())
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292 {
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293 # if defined (HAVE_QT_OFFSCREEN)
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294 static bool os_ctx_ok = true;
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295 if (os_ctx_ok && ! m_os_context.isValid ())
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296 {
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297 // Try to initialize offscreen context
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298 m_os_surface.create ();
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299 if (! m_os_context.create ())
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300 {
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301 os_ctx_ok = false;
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302 return false;
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303 }
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304 }
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305
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306 retval = m_os_context.makeCurrent (&m_os_surface);
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307 # else
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308 retval = false;
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309 # endif
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310 }
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311 else
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312 makeCurrent ();
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313
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314 return retval;
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315 }
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316
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317 void
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318 GLCanvas::end_rendering (void)
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319 {
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320 doneCurrent ();
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321 }
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322
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323 OCTAVE_END_NAMESPACE(octave)