diff options
author | Oswald Buddenhagen <oswald.buddenhagen@nokia.com> | 2012-04-10 12:48:01 +0200 |
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committer | Oswald Buddenhagen <oswald.buddenhagen@nokia.com> | 2012-04-10 15:31:45 +0200 |
commit | 143c4d3e13a430b951f4f4f8c28db14303f80605 (patch) | |
tree | 2b89637b93fc7d81c674106008566010f986d67c /src/gui/painting/qgammatables.cpp | |
parent | a7ed81b557d593a8ddb43b71bf4bbf3b44ead070 (diff) | |
parent | e5337ad1b1fb02873ce7b5ca8db45f6fd8063352 (diff) |
Merge remote-tracking branch 'origin/master' into api_changes
Conflicts:
configure
src/widgets/styles/qwindowsxpstyle.cpp
tests/auto/gui/kernel/qwindow/qwindow.pro
tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
Change-Id: I624b6d26abce9874c610c04954c1c45bc074bef3
Diffstat (limited to 'src/gui/painting/qgammatables.cpp')
-rw-r--r-- | src/gui/painting/qgammatables.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/src/gui/painting/qgammatables.cpp b/src/gui/painting/qgammatables.cpp new file mode 100644 index 0000000000..06dc95a103 --- /dev/null +++ b/src/gui/painting/qgammatables.cpp @@ -0,0 +1,66 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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, Nokia gives you certain additional +** rights. These rights are described in the Nokia 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <private/qdrawhelper_p.h> + +QT_BEGIN_NAMESPACE + + +QDrawHelperGammaTables::QDrawHelperGammaTables(qreal smoothing) +{ + const qreal gray_gamma = 2.31; + for (int i=0; i<256; ++i) + qt_pow_gamma[i] = uint(qRound(qPow(i / qreal(255.), gray_gamma) * 2047)); + for (int i=0; i<2048; ++i) + qt_pow_invgamma[i] = uchar(qRound(qPow(i / qreal(2047.0), 1 / gray_gamma) * 255)); + + refresh(smoothing); +} + +void QDrawHelperGammaTables::refresh(qreal smoothing) +{ + for (int i=0; i<256; ++i) { + qt_pow_rgb_gamma[i] = uchar(qRound(qPow(i / qreal(255.0), smoothing) * 255)); + qt_pow_rgb_invgamma[i] = uchar(qRound(qPow(i / qreal(255.), 1 / smoothing) * 255)); + } +} + +QT_END_NAMESPACE |