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annotate libgui/graphics/GLCanvas.h @ 31751:e863066429f1

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assume QOffscreenSurface is available QOffscreenSurface was introduced in Qt 5.1. * acinclude.m4 (OCTAVE_CHECK_QT_OPENGL_OFFSCREEN_OK): Delete. (OCTAVE_CHECK_QT_VERSION): Delete use. * configure.ac, geometryimages.m, interpimages.m, module.mk, plotimages.m, sparseimages.m, splineimages.m, GLCanvas.cc, GLCanvas.h, getframe.m, __check_rendering_capability__.m, copyobj.m, hgsave.m, jupyter-notebook.tst, publish.tst: Eliminate checks for Qt OffscreenSurface feature. Assume it is always available.
author John W. Eaton <jwe@octave.org>
date Tue, 17 Jan 2023 13:11:02 -0500
parents 5f11de0e7440
children 345a3f5890e7
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2011-2023 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 (octave_GLCanvas_h)
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27 #define octave_GLCanvas_h 1
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28
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29 #if defined (HAVE_QOPENGLWIDGET)
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30 # include <QOpenGLWidget>
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31 # define OCTAVE_QT_OPENGL_WIDGET QOpenGLWidget
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32 # include <QOpenGLFramebufferObject>
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33 # define OCTAVE_QT_OPENGL_FBO QOpenGLFramebufferObject
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34 # include <QOpenGLContext>
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35 # include <QOffscreenSurface>
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36 #elif defined (HAVE_QGLWIDGET)
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37 # include <QGLWidget>
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38 # define OCTAVE_QT_OPENGL_WIDGET QGLWidget
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39 # include <QGLFramebufferObject>
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40 # define OCTAVE_QT_OPENGL_FBO QGLFramebufferObject
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41 #else
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42 # error "configuration error: must have <QOpenGLWidget> or <QGLWidget>."
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43 #endif
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44
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45 #include "Canvas.h"
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46
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47 #include "gl-render.h"
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48 #include "qopengl-functions.h"
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49
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50 OCTAVE_BEGIN_NAMESPACE(octave)
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51
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52 class GLCanvas : public OCTAVE_QT_OPENGL_WIDGET, public Canvas
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53 {
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54 public:
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55 GLCanvas (octave::interpreter& interp,
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56 const graphics_handle& handle, QWidget *parent);
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57 ~GLCanvas (void);
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58
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59 void initializeGL (void);
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60
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61 void draw (const graphics_handle& handle);
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62 uint8NDArray do_getPixels (const graphics_handle& handle);
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63 void do_print (const QString& file_cmd, const QString& term,
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64 const graphics_handle& handle);
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65 void drawZoomBox (const QPoint& p1, const QPoint& p2);
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66 void resize (int /* x */, int /* y */,
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67 int /* width */, int /* height */) { }
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68 graphics_object selectFromAxes (const graphics_object& ax,
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69 const QPoint& pt);
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70 QWidget * qWidget (void) { return this; }
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71
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72 protected:
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73 void paintGL (void);
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74 void mouseDoubleClickEvent (QMouseEvent *event);
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75 void mouseMoveEvent (QMouseEvent *event);
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76 void mousePressEvent (QMouseEvent *event);
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77 void mouseReleaseEvent (QMouseEvent *event);
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78 void wheelEvent (QWheelEvent *event);
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79 void keyPressEvent (QKeyEvent *event);
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80 void keyReleaseEvent (QKeyEvent *event);
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81
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82 private:
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83
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84 bool begin_rendering (void);
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85 void end_rendering (void);
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86
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87 octave::qopengl_functions m_glfcns;
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88 octave::opengl_renderer m_renderer;
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89
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90 QOpenGLContext m_os_context;
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91 QOffscreenSurface m_os_surface;
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92 };
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93
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94 OCTAVE_END_NAMESPACE(octave)
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95
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96 #endif