Mercurial > octave
view libgui/graphics/GLCanvas.cc @ 24837:ae6679369a80
Rely on QOffscreenSurface functionality rather than its presence (bug #53278)
* acinclude.m4: Define HAVE_QT_OFFSCREEN if QOffscreenSurface is functional
* getframe.m: rely on HAVE_QT_OFFSCREEN rather than HAVE_QOFFSCREENSURFACE
* __opengl_print__.m: Ditto
* GLCanvas.h/cc: Ditto
author | Pantxo Diribarne <pantxo.diribarne@gmail.com> |
---|---|
date | Sun, 04 Mar 2018 22:01:00 +0100 |
parents | 45470049a43f |
children | 6652d3823428 |
line wrap: on
line source
/* Copyright (C) 2011-2017 Michael Goffioul This file is part of Octave. Octave is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <https://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include "gl-render.h" #include "gl2ps-print.h" #include "graphics.h" #include "octave-link.h" #include "GLCanvas.h" #include "gl-select.h" namespace QtHandles { #if defined (HAVE_QOPENGLWIDGET) # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS #else # if defined (Q_OS_WIN32) # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS \ QGLFormat (QGL::SampleBuffers | QGL::AlphaChannel \ | QGL::IndirectRendering), # else # define OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS \ QGLFormat (QGL::SampleBuffers | QGL::AlphaChannel), # endif #endif GLCanvas::GLCanvas (QWidget *xparent, const graphics_handle& gh) : OCTAVE_QT_OPENGL_WIDGET (OCTAVE_QT_OPENGL_WIDGET_FORMAT_ARGS xparent), Canvas (gh) { setFocusPolicy (Qt::ClickFocus); setFocus (); } GLCanvas::~GLCanvas (void) { } void GLCanvas::draw (const graphics_handle& gh) { gh_manager::auto_lock lock; graphics_object go = gh_manager::get_object (gh); if (go) { octave::opengl_renderer r; r.set_viewport (width (), height ()); r.draw (go); } } uint8NDArray GLCanvas::do_getPixels (const graphics_handle& gh) { uint8NDArray retval; graphics_object go = gh_manager::get_object (gh); if (go && go.isa ("figure")) { Matrix pos = go.get ("position").matrix_value (); // Make sure we have a valid current context if (! begin_rendering ()) return retval; // When the figure is not visible or its size is frozen for printing, // we use a framebuffer object to make sure we are rendering on a // suitably large frame. if (go.get ("visible").string_value () == "off" || go.get ("__printing__").string_value () == "on") { OCTAVE_QT_OPENGL_FBO fbo (pos(2), pos(3),OCTAVE_QT_OPENGL_FBO::Attachment::Depth); fbo.bind (); octave::opengl_renderer r; r.set_viewport (pos(2), pos(3)); r.draw (go); retval = r.get_pixels (pos(2), pos(3)); fbo.release (); } else { octave::opengl_renderer r; r.set_viewport (pos(2), pos(3)); r.draw (go); retval = r.get_pixels (pos(2), pos(3)); } end_rendering (); } return retval; } void GLCanvas::do_print (const QString& file_cmd, const QString& term, const graphics_handle& handle) { gh_manager::auto_lock lock; graphics_object obj = gh_manager::get_object (handle); if (obj.valid_object ()) { graphics_object figObj (obj.get_ancestor ("figure")); try { // Make sure we have a valid current context if (! begin_rendering ()) error ("print: no valid OpenGL offscreen context"); octave::gl2ps_print (figObj, file_cmd.toStdString (), term.toStdString ()); } catch (octave::execution_exception e) { octave_link::post_exception (std::current_exception ()); end_rendering (); } } } void GLCanvas::toggleAxes (const graphics_handle& gh) { canvasToggleAxes (gh); } void GLCanvas::toggleGrid (const graphics_handle& gh) { canvasToggleGrid (gh); } void GLCanvas::autoAxes (const graphics_handle& gh) { canvasAutoAxes (gh); } graphics_object GLCanvas::selectFromAxes (const graphics_object& ax, const QPoint& pt) { makeCurrent (); if (ax) { octave::opengl_selector s; s.set_viewport (width (), height ()); return s.select (ax, pt.x (), height () - pt.y (), octave::select_ignore_hittest); } return graphics_object (); } inline void glDrawZoomBox (const QPoint& p1, const QPoint& p2) { glVertex2d (p1.x (), p1.y ()); glVertex2d (p2.x (), p1.y ()); glVertex2d (p2.x (), p2.y ()); glVertex2d (p1.x (), p2.y ()); glVertex2d (p1.x (), p1.y ()); } void GLCanvas::drawZoomBox (const QPoint& p1, const QPoint& p2) { glMatrixMode (GL_MODELVIEW); glPushMatrix (); glLoadIdentity (); glMatrixMode (GL_PROJECTION); glPushMatrix (); glLoadIdentity (); glOrtho (0, width (), height (), 0, 1, -1); glPushAttrib (GL_DEPTH_BUFFER_BIT | GL_CURRENT_BIT); glDisable (GL_DEPTH_TEST); glBegin (GL_POLYGON); glColor4f (0.45, 0.62, 0.81, 0.1); glDrawZoomBox (p1, p2); glEnd (); glLineWidth (1.5); glBegin (GL_LINE_STRIP); glColor4f (0.45, 0.62, 0.81, 0.9); glDrawZoomBox (p1, p2); glEnd (); glPopAttrib (); glMatrixMode (GL_MODELVIEW); glPopMatrix (); glMatrixMode (GL_PROJECTION); glPopMatrix (); } void GLCanvas::paintGL (void) { canvasPaintEvent (); } void GLCanvas::mouseDoubleClickEvent (QMouseEvent *xevent) { canvasMouseDoubleClickEvent (xevent); } void GLCanvas::mouseMoveEvent (QMouseEvent *xevent) { canvasMouseMoveEvent (xevent); } void GLCanvas::mousePressEvent (QMouseEvent *xevent) { canvasMousePressEvent (xevent); } void GLCanvas::mouseReleaseEvent (QMouseEvent *xevent) { canvasMouseReleaseEvent (xevent); } void GLCanvas::wheelEvent (QWheelEvent *xevent) { canvasWheelEvent (xevent); } void GLCanvas::keyPressEvent (QKeyEvent *xevent) { if (! canvasKeyPressEvent (xevent)) OCTAVE_QT_OPENGL_WIDGET::keyPressEvent (xevent); } void GLCanvas::keyReleaseEvent (QKeyEvent *xevent) { if (! canvasKeyReleaseEvent (xevent)) OCTAVE_QT_OPENGL_WIDGET::keyReleaseEvent (xevent); } bool GLCanvas::begin_rendering (void) { bool retval = true; if (! isValid ()) { # if defined (HAVE_QT_OFFSCREEN) static bool os_ctx_ok = true; if (os_ctx_ok && ! m_os_context.isValid ()) { // Try to initialize offscreen context m_os_surface.create (); if (! m_os_context.create ()) { os_ctx_ok = false; return false; } } retval = m_os_context.makeCurrent (&m_os_surface); # else retval = false; # endif } else makeCurrent (); return retval; } void GLCanvas::end_rendering (void) { doneCurrent (); } }