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annotate libgui/graphics/GLCanvas.h @ 25863:8a6bf76abf31

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eliminate some duplicate OpenGL drawing code * gl-render.h, gl-render.cc (opengl_renderer::draw_zoom_box, opengl_renderer::draw_zoom_rect): New functions. * GLCanvas.h, GLCanvas.cc (GLCanvas::m_renderer): New data member. (GLCanvas::draw, GLCanvas::do_getPixels): Use it instead of creating renderer locally. (GLCanvas::drawZoomRect): Delete. (GLCanvas::drawZoomBox): Set up parameters and call opengl_renderer::draw_zoom_box to eliminate code duplicated in __init_fltk__.cc. * __init_fltk__.cc (OpenGL_fltk::zoom_box_vertex): Delete. (OpenGL_fltk::overlay): Set up parameters and call opengl_renderer::draw_zoom_box to eliminate code duplicated in GLCanvas.cc.
author John W. Eaton <jwe@octave.org>
date Sat, 08 Sep 2018 08:03:36 -0400
parents e5a73a8c116c
children 00f796120a6d
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1 /*
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2
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3 Copyright (C) 2011-2018 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 (octave_GLCanvas_h)
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24 #define octave_GLCanvas_h 1
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25
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26 #if defined (HAVE_QOPENGLWIDGET)
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27 # include <QOpenGLWidget>
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28 # define OCTAVE_QT_OPENGL_WIDGET QOpenGLWidget
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29 # include <QOpenGLFramebufferObject>
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30 # define OCTAVE_QT_OPENGL_FBO QOpenGLFramebufferObject
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31 # if defined (HAVE_QT_OFFSCREEN)
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32 # include <QOpenGLContext>
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33 # include <QOffscreenSurface>
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34 # endif
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35 #elif defined (HAVE_QGLWIDGET)
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36 # include <QGLWidget>
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37 # define OCTAVE_QT_OPENGL_WIDGET QGLWidget
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38 # include <QGLFramebufferObject>
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39 # define OCTAVE_QT_OPENGL_FBO QGLFramebufferObject
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40 #else
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41 # error "configuration error: must have <QOpenGLWidget> or <QGLWidget>."
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42 #endif
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43
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44 #include "Canvas.h"
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45
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46 #include "gl-render.h"
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47 #include "qopengl-functions.h"
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48
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49 namespace QtHandles
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50 {
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51 class GLCanvas : public OCTAVE_QT_OPENGL_WIDGET, public Canvas
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52 {
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53 public:
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54 GLCanvas (QWidget *parent, const graphics_handle& handle);
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55 ~GLCanvas (void);
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56
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57 void initializeGL (void);
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58
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59 void draw (const graphics_handle& handle);
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60 uint8NDArray do_getPixels (const graphics_handle& handle);
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61 void do_print (const QString& file_cmd, const QString& term,
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62 const graphics_handle& handle);
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63 void toggleAxes (const graphics_handle& handle);
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64 void toggleGrid (const graphics_handle& handle);
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65 void autoAxes (const graphics_handle& handle);
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66 void drawZoomBox (const QPoint& p1, const QPoint& p2);
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67 void resize (int /* x */, int /* y */,
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68 int /* width */, int /* height */) { }
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69 graphics_object selectFromAxes (const graphics_object& ax,
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70 const QPoint& pt);
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71 QWidget * qWidget (void) { return this; }
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72
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73 protected:
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74 void paintGL (void);
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75 void mouseDoubleClickEvent (QMouseEvent *event);
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76 void mouseMoveEvent (QMouseEvent *event);
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77 void mousePressEvent (QMouseEvent *event);
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78 void mouseReleaseEvent (QMouseEvent *event);
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79 void wheelEvent (QWheelEvent *event);
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80 void keyPressEvent (QKeyEvent *event);
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81 void keyReleaseEvent (QKeyEvent *event);
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82
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83 private:
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84
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85 bool begin_rendering (void);
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86 void end_rendering (void);
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87
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88 octave::qopengl_functions m_glfcns;
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89 octave::opengl_renderer m_renderer;
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90
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91 # if defined (HAVE_QT_OFFSCREEN)
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92 QOpenGLContext m_os_context;
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93 QOffscreenSurface m_os_surface;
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94 # endif
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95 };
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96
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97 }
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98
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99 #endif