diff options
Diffstat (limited to 'src/gui/opengl/qopenglcolormap.cpp')
| -rw-r--r-- | src/gui/opengl/qopenglcolormap.cpp | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/src/gui/opengl/qopenglcolormap.cpp b/src/gui/opengl/qopenglcolormap.cpp deleted file mode 100644 index 386358ac23..0000000000 --- a/src/gui/opengl/qopenglcolormap.cpp +++ /dev/null @@ -1,297 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** 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. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -/*! - \class QOpenGLColormap - \brief The QOpenGLColormap class is used for installing custom colormaps into - a QOpenGLWidget. - - \module OpenGL - \ingroup painting-3D - \ingroup shared - - QOpenGLColormap provides a platform independent way of specifying and - installing indexed colormaps for a QOpenGLWidget. QOpenGLColormap is - especially useful when using the OpenGL color-index mode. - - Under X11 you must use an X server that supports either a \c - PseudoColor or \c DirectColor visual class. If your X server - currently only provides a \c GrayScale, \c TrueColor, \c - StaticColor or \c StaticGray visual, you will not be able to - allocate colorcells for writing. If this is the case, try setting - your X server to 8 bit mode. It should then provide you with at - least a \c PseudoColor visual. Note that you may experience - colormap flashing if your X server is running in 8 bit mode. - - The size() of the colormap is always set to 256 - colors. Note that under Windows you can also install colormaps - in child widgets. - - This class uses \l{implicit sharing} as a memory and speed - optimization. - - Example of use: - \snippet doc/src/snippets/code/src_opengl_qopenglcolormap.cpp 0 - - \sa QOpenGLWidget::setColormap(), QOpenGLWidget::colormap() -*/ - -/*! - \fn Qt::HANDLE QOpenGLColormap::handle() - - \internal - - Returns the handle for this color map. -*/ - -/*! - \fn void QOpenGLColormap::setHandle(Qt::HANDLE handle) - - \internal - - Sets the handle for this color map to \a handle. -*/ - -#include "qopenglcolormap.h" - -QT_BEGIN_NAMESPACE - -QOpenGLColormap::QOpenGLColormapData QOpenGLColormap::shared_null = { Q_BASIC_ATOMIC_INITIALIZER(1), 0, 0 }; - -/*! - Construct a QOpenGLColormap. -*/ -QOpenGLColormap::QOpenGLColormap() - : d(&shared_null) -{ - d->ref.ref(); -} - - -/*! - Construct a shallow copy of \a map. -*/ -QOpenGLColormap::QOpenGLColormap(const QOpenGLColormap &map) - : d(map.d) -{ - d->ref.ref(); -} - -/*! - Dereferences the QOpenGLColormap and deletes it if this was the last - reference to it. -*/ -QOpenGLColormap::~QOpenGLColormap() -{ - if (!d->ref.deref()) - cleanup(d); -} - -void QOpenGLColormap::cleanup(QOpenGLColormap::QOpenGLColormapData *x) -{ - delete x->cells; - x->cells = 0; - delete x; -} - -/*! - Assign a shallow copy of \a map to this QOpenGLColormap. -*/ -QOpenGLColormap & QOpenGLColormap::operator=(const QOpenGLColormap &map) -{ - map.d->ref.ref(); - if (!d->ref.deref()) - cleanup(d); - d = map.d; - return *this; -} - -/*! - \fn void QOpenGLColormap::detach() - \internal - - Detaches this QOpenGLColormap from the shared block. -*/ - -void QOpenGLColormap::detach_helper() -{ - QOpenGLColormapData *x = new QOpenGLColormapData; - x->ref = 1; - x->cmapHandle = 0; - x->cells = 0; - if (d->cells) { - x->cells = new QVector<QRgb>(256); - *x->cells = *d->cells; - } - if (!d->ref.deref()) - cleanup(d); - d = x; -} - -/*! - Set cell at index \a idx in the colormap to color \a color. -*/ -void QOpenGLColormap::setEntry(int idx, QRgb color) -{ - detach(); - if (!d->cells) - d->cells = new QVector<QRgb>(256); - d->cells->replace(idx, color); -} - -/*! - Set an array of cells in this colormap. \a count is the number of - colors that should be set, \a colors is the array of colors, and - \a base is the starting index. The first element in \a colors - is set at \a base in the colormap. -*/ -void QOpenGLColormap::setEntries(int count, const QRgb *colors, int base) -{ - detach(); - if (!d->cells) - d->cells = new QVector<QRgb>(256); - - Q_ASSERT_X(colors && base >= 0 && (base + count) <= d->cells->size(), "QOpenGLColormap::setEntries", - "preconditions not met"); - for (int i = 0; i < count; ++i) - setEntry(base + i, colors[i]); -} - -/*! - Returns the QRgb value in the colorcell with index \a idx. -*/ -QRgb QOpenGLColormap::entryRgb(int idx) const -{ - if (d == &shared_null || !d->cells) - return 0; - else - return d->cells->at(idx); -} - -/*! - \overload - - Set the cell with index \a idx in the colormap to color \a color. -*/ -void QOpenGLColormap::setEntry(int idx, const QColor &color) -{ - setEntry(idx, color.rgb()); -} - -/*! - Returns the QRgb value in the colorcell with index \a idx. -*/ -QColor QOpenGLColormap::entryColor(int idx) const -{ - if (d == &shared_null || !d->cells) - return QColor(); - else - return QColor(d->cells->at(idx)); -} - -/*! - Returns true if the colormap is empty or it is not in use - by a QOpenGLWidget; otherwise returns false. - - A colormap with no color values set is considered to be empty. - For historical reasons, a colormap that has color values set - but which is not in use by a QOpenGLWidget is also considered empty. - - Compare size() with zero to determine if the colormap is empty - regardless of whether it is in use by a QOpenGLWidget or not. - - \sa size() -*/ -bool QOpenGLColormap::isEmpty() const -{ - return d == &shared_null || d->cells == 0 || d->cells->size() == 0 || d->cmapHandle == 0; -} - - -/*! - Returns the number of colorcells in the colormap. -*/ -int QOpenGLColormap::size() const -{ - return d->cells ? d->cells->size() : 0; -} - -/*! - Returns the index of the color \a color. If \a color is not in the - map, -1 is returned. -*/ -int QOpenGLColormap::find(QRgb color) const -{ - if (d->cells) - return d->cells->indexOf(color); - return -1; -} - -/*! - Returns the index of the color that is the closest match to color - \a color. -*/ -int QOpenGLColormap::findNearest(QRgb color) const -{ - int idx = find(color); - if (idx >= 0) - return idx; - int mapSize = size(); - int mindist = 200000; - int r = qRed(color); - int g = qGreen(color); - int b = qBlue(color); - int rx, gx, bx, dist; - for (int i = 0; i < mapSize; ++i) { - QRgb ci = d->cells->at(i); - rx = r - qRed(ci); - gx = g - qGreen(ci); - bx = b - qBlue(ci); - dist = rx * rx + gx * gx + bx * bx; // calculate distance - if (dist < mindist) { // minimal? - mindist = dist; - idx = i; - } - } - return idx; -} - -QT_END_NAMESPACE |