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authorLaszlo Agocs <laszlo.agocs@digia.com>2014-04-24 14:36:49 +0200
committerThe Qt Project <gerrit-noreply@qt-project.org>2014-05-22 22:00:59 +0200
commit39e06078258393f28c3def96326c26c55e450844 (patch)
tree4cf90468516dc175b44b83c98fa7abc07d140601 /src/plugins/platforms/windows/qwindowsopengltester.h
parent09ed9e3eae71efdcc769a83859fcfa976ed40694 (diff)
Load winsys and gl dynamically in the windows plugin
The dynamic builds (-opengl dynamic) are now functional on Windows. In such a build no components in Qt link to any OpenGL libraries directly and qmake will not automatically add any such libraries to the applications' makefiles. Instead, the libraries are chosen and loaded during runtime and applications are expected to use QOpenGLFunctions instead of direct OpenGLfunction calls. Set the environment variable QT_OPENGL to desktop or angle to skip testing and force the given implementation. The application attributes (AA_UseOpenGLES and such) are also taken into account. The testing logic is same as before: We try to load opengl32 and resolve a shader related function. If this fails, ANGLE is chosen. This allows utilizing full desktop OpenGL on systems that have proper drivers, while a transparent fallback to ANGLE will be done automatically for systems that don't. The latter includes also remote desktop connections. Software rendering via Mesa llvmpipe is supported too. The fallback is automatic on systems where the desktop test fails and ANGLE fails to load or initialize (e.g. due to missing libs like d3dcompiler), as long as a suitable patched build of Mesa is available. [ChangeLog][QtGui] Dynamic OpenGL implementation loading is now supported on Windows. This requires Qt to be configured with -opengl dynamic. Task-number: QTBUG-36483 Change-Id: Ie8bb25a6d55b3a1609b00150aeccd909aec27313 Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Diffstat (limited to 'src/plugins/platforms/windows/qwindowsopengltester.h')
-rw-r--r--src/plugins/platforms/windows/qwindowsopengltester.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/src/plugins/platforms/windows/qwindowsopengltester.h b/src/plugins/platforms/windows/qwindowsopengltester.h
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+++ b/src/plugins/platforms/windows/qwindowsopengltester.h
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <qtwindowsglobal.h>
+
+QT_BEGIN_NAMESPACE
+
+class QWindowsOpenGLTester
+{
+public:
+ static bool testDesktopGL();
+};
+
+QT_END_NAMESPACE