| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Data Visualization module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
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| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #ifndef QUTILS_H |
| #define QUTILS_H |
| |
| #include <QtGui/QSurfaceFormat> |
| #include <QtGui/QOpenGLContext> |
| #include <QtGui/QOpenGLFunctions> |
| #include <QtGui/QOffscreenSurface> |
| #include <QtCore/QCoreApplication> |
| |
| namespace QtDataVisualization { |
| |
| #ifndef Q_QDOC |
| static inline QSurfaceFormat qDefaultSurfaceFormat(bool antialias = true) Q_DECL_UNUSED; |
| #endif |
| static inline QSurfaceFormat qDefaultSurfaceFormat(bool antialias) |
| { |
| bool isES = false; |
| |
| QSurfaceFormat surfaceFormat; |
| |
| // Common attributes |
| surfaceFormat.setDepthBufferSize(24); |
| surfaceFormat.setStencilBufferSize(8); |
| surfaceFormat.setSwapBehavior(QSurfaceFormat::DoubleBuffer); |
| surfaceFormat.setRenderableType(QSurfaceFormat::DefaultRenderableType); |
| |
| QOpenGLContext *ctx = QOpenGLContext::currentContext(); |
| QOffscreenSurface *dummySurface = nullptr; |
| if (!ctx) { |
| dummySurface = new QOffscreenSurface(); |
| dummySurface->setFormat(surfaceFormat); |
| dummySurface->create(); |
| ctx = new QOpenGLContext; |
| ctx->setFormat(surfaceFormat); |
| ctx->create(); |
| ctx->makeCurrent(dummySurface); |
| } |
| |
| #if defined(QT_OPENGL_ES_2) |
| isES = true; |
| #elif (QT_VERSION < QT_VERSION_CHECK(5, 3, 0)) |
| isES = false; |
| #else |
| isES = ctx->isOpenGLES(); |
| #endif |
| |
| #if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)) |
| // We support only ES2 emulation with software renderer for now |
| QString versionStr; |
| #ifdef Q_OS_WIN |
| const GLubyte *openGLVersion = ctx->functions()->glGetString(GL_VERSION); |
| versionStr = QString::fromLatin1(reinterpret_cast<const char *>(openGLVersion)).toLower(); |
| #endif |
| if (versionStr.contains(QStringLiteral("mesa")) |
| || QCoreApplication::testAttribute(Qt::AA_UseSoftwareOpenGL)) { |
| qWarning("Only OpenGL ES2 emulation is available for software rendering."); |
| isES = true; |
| } |
| #endif |
| |
| if (dummySurface) { |
| ctx->doneCurrent(); |
| delete ctx; |
| delete dummySurface; |
| } |
| |
| if (isES) { |
| // For ES2 only attributes |
| surfaceFormat.setRedBufferSize(8); |
| surfaceFormat.setBlueBufferSize(8); |
| surfaceFormat.setGreenBufferSize(8); |
| } else { |
| surfaceFormat.setVersion(2, 1); |
| surfaceFormat.setProfile(QSurfaceFormat::CoreProfile); |
| // For OpenGL only attributes |
| if (antialias) |
| surfaceFormat.setSamples(8); |
| else |
| surfaceFormat.setSamples(0); |
| } |
| |
| return surfaceFormat; |
| } |
| |
| } |
| |
| #endif |