vcl/qt5/Qt5OpenGLContext.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.
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   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 <Qt5OpenGLContext.hxx>
  21
  22 #include <vcl/sysdata.hxx>
  23 #include <opengl/zone.hxx>
  24 #include <sal/log.hxx>
  25
  26 #include <window.h>
  27
  28 #include <Qt5Object.hxx>
  29
  30 #include <QtGui/QOpenGLContext>
  31 #include <QtGui/QWindow>
  32
  33 bool Qt5OpenGLContext::g_bAnyCurrent = false;
  34
  35 void Qt5OpenGLContext::swapBuffers()
  36 {
  37     OpenGLZone aZone;
  38
  39     if (m_pContext && m_pWindow && m_pWindow->isExposed())
  40     {
  41         m_pContext->swapBuffers(m_pWindow);
  42     }
  43
  44     BuffersSwapped();
  45 }
  46
  47 void Qt5OpenGLContext::resetCurrent()
  48 {
  49     clearCurrent();
  50
  51     OpenGLZone aZone;
  52
  53     if (m_pContext)
  54     {
  55         m_pContext->doneCurrent();
  56         g_bAnyCurrent = false;
  57     }
  58 }
  59
  60 bool Qt5OpenGLContext::isCurrent()
  61 {
  62     OpenGLZone aZone;
  63     return g_bAnyCurrent && (QOpenGLContext::currentContext() == m_pContext);
  64 }
  65
  66 bool Qt5OpenGLContext::isAnyCurrent()
  67 {
  68     OpenGLZone aZone;
  69     return g_bAnyCurrent && (QOpenGLContext::currentContext() != nullptr);
  70 }
  71
  72 bool Qt5OpenGLContext::ImplInit()
  73 {
  74     if (!m_pWindow)
  75     {
  76         SAL_WARN("vcl.opengl.qt5", "failed to create window");
  77         return false;
  78     }
  79
  80     m_pWindow->setSurfaceType(QSurface::OpenGLSurface);
  81     m_pWindow->create();
  82
  83     m_pContext = new QOpenGLContext(m_pWindow);
  84     if (!m_pContext->create())
  85     {
  86         SAL_WARN("vcl.opengl.qt5", "failed to create context");
  87         return false;
  88     }
  89
  90     m_pContext->makeCurrent(m_pWindow);
  91     g_bAnyCurrent = true;
  92
  93     bool bRet = InitGL();
  94     InitGLDebugging();
  95
  96     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
  97
  98     registerAsCurrent();
  99
 100     return bRet;
 101 }
 102
 103 void Qt5OpenGLContext::makeCurrent()
 104 {
 105     if (isCurrent())
 106         return;
 107
 108     OpenGLZone aZone;
 109
 110     clearCurrent();
 111
 112     if (m_pContext && m_pWindow)
 113     {
 114         m_pContext->makeCurrent(m_pWindow);
 115         g_bAnyCurrent = true;
 116     }
 117
 118     registerAsCurrent();
 119 }
 120
 121 void Qt5OpenGLContext::destroyCurrentContext()
 122 {
 123     OpenGLZone aZone;
 124
 125     if (m_pContext)
 126     {
 127         m_pContext->doneCurrent();
 128         g_bAnyCurrent = false;
 129     }
 130
 131     if (glGetError() != GL_NO_ERROR)
 132     {
 133         SAL_WARN("vcl.opengl.qt5", "glError: " << glGetError());
 134     }
 135 }
 136
 137 void Qt5OpenGLContext::initWindow()
 138 {
 139     if (!m_pChildWindow)
 140     {
 141         SystemWindowData winData = generateWinData(mpWindow, mbRequestLegacyContext);
 142         m_pChildWindow = VclPtr<SystemChildWindow>::Create(mpWindow, 0, &winData, false);
 143     }
 144
 145     if (m_pChildWindow)
 146     {
 147         InitChildWindow(m_pChildWindow.get());
 148     }
 149
 150     m_pWindow
 151         = static_cast<Qt5Object*>(m_pChildWindow->ImplGetWindowImpl()->mpSysObj)->windowHandle();
 152 }