vcl/qt5/QtOpenGLContext.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <QtOpenGLContext.hxx>
  21
  22 #include <epoxy/gl.h>
  23
  24 #include <vcl/sysdata.hxx>
  25 #include <opengl/zone.hxx>
  26 #include <sal/log.hxx>
  27
  28 #include <window.h>
  29
  30 #include <QtObject.hxx>
  31
  32 #include <QtGui/QOpenGLContext>
  33 #include <QtGui/QWindow>
  34
  35 bool QtOpenGLContext::g_bAnyCurrent = false;
  36
  37 void QtOpenGLContext::swapBuffers()
  38 {
  39     OpenGLZone aZone;
  40
  41     if (m_pContext && m_pWindow && m_pWindow->isExposed())
  42     {
  43         m_pContext->swapBuffers(m_pWindow);
  44     }
  45
  46     BuffersSwapped();
  47 }
  48
  49 void QtOpenGLContext::resetCurrent()
  50 {
  51     clearCurrent();
  52
  53     OpenGLZone aZone;
  54
  55     if (m_pContext)
  56     {
  57         m_pContext->doneCurrent();
  58         g_bAnyCurrent = false;
  59     }
  60 }
  61
  62 bool QtOpenGLContext::isCurrent()
  63 {
  64     OpenGLZone aZone;
  65     return g_bAnyCurrent && (QOpenGLContext::currentContext() == m_pContext);
  66 }
  67
  68 bool QtOpenGLContext::isAnyCurrent()
  69 {
  70     OpenGLZone aZone;
  71     return g_bAnyCurrent && (QOpenGLContext::currentContext() != nullptr);
  72 }
  73
  74 bool QtOpenGLContext::ImplInit()
  75 {
  76     if (!m_pWindow)
  77     {
  78         SAL_WARN("vcl.opengl.qt", "failed to create window");
  79         return false;
  80     }
  81
  82     m_pWindow->setSurfaceType(QSurface::OpenGLSurface);
  83     m_pWindow->create();
  84
  85     m_pContext = new QOpenGLContext(m_pWindow);
  86     if (!m_pContext->create())
  87     {
  88         SAL_WARN("vcl.opengl.qt", "failed to create context");
  89         return false;
  90     }
  91
  92     m_pContext->makeCurrent(m_pWindow);
  93     g_bAnyCurrent = true;
  94
  95     bool bRet = InitGL();
  96     InitGLDebugging();
  97
  98     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
  99
 100     registerAsCurrent();
 101
 102     return bRet;
 103 }
 104
 105 void QtOpenGLContext::makeCurrent()
 106 {
 107     if (isCurrent())
 108         return;
 109
 110     OpenGLZone aZone;
 111
 112     clearCurrent();
 113
 114     if (m_pContext && m_pWindow)
 115     {
 116         m_pContext->makeCurrent(m_pWindow);
 117         g_bAnyCurrent = true;
 118     }
 119
 120     registerAsCurrent();
 121 }
 122
 123 void QtOpenGLContext::destroyCurrentContext()
 124 {
 125     OpenGLZone aZone;
 126
 127     if (m_pContext)
 128     {
 129         m_pContext->doneCurrent();
 130         g_bAnyCurrent = false;
 131     }
 132
 133     if (glGetError() != GL_NO_ERROR)
 134     {
 135         SAL_WARN("vcl.opengl.qt", "glError: " << glGetError());
 136     }
 137 }
 138
 139 void QtOpenGLContext::initWindow()
 140 {
 141     if (!m_pChildWindow)
 142     {
 143         SystemWindowData winData = generateWinData(mpWindow, mbRequestLegacyContext);
 144         m_pChildWindow = VclPtr<SystemChildWindow>::Create(mpWindow, 0, &winData, false);
 145     }
 146
 147     if (m_pChildWindow)
 148     {
 149         InitChildWindow(m_pChildWindow.get());
 150     }
 151
 152     m_pWindow
 153         = static_cast<QtObject*>(m_pChildWindow->ImplGetWindowImpl()->mpSysObj)->windowHandle();
 154 }