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+/****************************************************************************
+**
+** 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 "qcolormap.h"
+#include "qcolor.h"
+#include "qpaintdevice.h"
+#include "qscreen.h"
+#include "qguiapplication.h"
+
+QT_BEGIN_NAMESPACE
+
+class QColormapPrivate
+{
+public:
+ inline QColormapPrivate()
+ : ref(1), mode(QColormap::Direct), depth(0), numcolors(0)
+ { }
+
+ QAtomicInt ref;
+
+ QColormap::Mode mode;
+ int depth;
+ int numcolors;
+};
+
+static QColormapPrivate *screenMap = 0;
+
+void QColormap::initialize()
+{
+ screenMap = new QColormapPrivate;
+
+ screenMap->depth = QGuiApplication::primaryScreen()->depth();
+ if (screenMap->depth < 8) {
+ screenMap->mode = QColormap::Indexed;
+ screenMap->numcolors = 256;
+ } else {
+ screenMap->mode = QColormap::Direct;
+ screenMap->numcolors = -1;
+ }
+}
+
+void QColormap::cleanup()
+{
+ delete screenMap;
+ screenMap = 0;
+}
+
+QColormap QColormap::instance(int /*screen*/)
+{
+ return QColormap();
+}
+
+QColormap::QColormap()
+ : d(screenMap)
+{ d->ref.ref(); }
+
+QColormap::QColormap(const QColormap &colormap)
+ :d (colormap.d)
+{ d->ref.ref(); }
+
+QColormap::~QColormap()
+{
+ if (!d->ref.deref())
+ delete d;
+}
+
+QColormap::Mode QColormap::mode() const
+{ return d->mode; }
+
+
+int QColormap::depth() const
+{ return d->depth; }
+
+
+int QColormap::size() const
+{
+ return d->numcolors;
+}
+
+#ifndef QT_QWS_DEPTH16_RGB
+#define QT_QWS_DEPTH16_RGB 565
+#endif
+static const int qt_rbits = (QT_QWS_DEPTH16_RGB/100);
+static const int qt_gbits = (QT_QWS_DEPTH16_RGB/10%10);
+static const int qt_bbits = (QT_QWS_DEPTH16_RGB%10);
+static const int qt_red_shift = qt_bbits+qt_gbits-(8-qt_rbits);
+static const int qt_green_shift = qt_bbits-(8-qt_gbits);
+static const int qt_neg_blue_shift = 8-qt_bbits;
+static const int qt_blue_mask = (1<<qt_bbits)-1;
+static const int qt_green_mask = (1<<(qt_gbits+qt_bbits))-(1<<qt_bbits);
+static const int qt_red_mask = (1<<(qt_rbits+qt_gbits+qt_bbits))-(1<<(qt_gbits+qt_bbits));
+
+static const int qt_red_rounding_shift = qt_red_shift + qt_rbits;
+static const int qt_green_rounding_shift = qt_green_shift + qt_gbits;
+static const int qt_blue_rounding_shift = qt_bbits - qt_neg_blue_shift;
+
+inline ushort qt_convRgbTo16(QRgb c)
+{
+ const int tr = qRed(c) << qt_red_shift;
+ const int tg = qGreen(c) << qt_green_shift;
+ const int tb = qBlue(c) >> qt_neg_blue_shift;
+
+ return (tb & qt_blue_mask) | (tg & qt_green_mask) | (tr & qt_red_mask);
+}
+
+inline QRgb qt_conv16ToRgb(ushort c)
+{
+ const int r=(c & qt_red_mask);
+ const int g=(c & qt_green_mask);
+ const int b=(c & qt_blue_mask);
+ const int tr = r >> qt_red_shift | r >> qt_red_rounding_shift;
+ const int tg = g >> qt_green_shift | g >> qt_green_rounding_shift;
+ const int tb = b << qt_neg_blue_shift | b >> qt_blue_rounding_shift;
+
+ return qRgb(tr,tg,tb);
+}
+
+uint QColormap::pixel(const QColor &color) const
+{
+ QRgb rgb = color.rgba();
+ if (d->mode == QColormap::Direct) {
+ switch(d->depth) {
+ case 16:
+ return qt_convRgbTo16(rgb);
+ case 24:
+ case 32:
+ {
+ const int r = qRed(rgb);
+ const int g = qGreen(rgb);
+ const int b = qBlue(rgb);
+ const int red_shift = 16;
+ const int green_shift = 8;
+ const int red_mask = 0xff0000;
+ const int green_mask = 0x00ff00;
+ const int blue_mask = 0x0000ff;
+ const int tg = g << green_shift;
+#ifdef QT_QWS_DEPTH_32_BGR
+ if (qt_screen->pixelType() == QScreen::BGRPixel) {
+ const int tb = b << red_shift;
+ return 0xff000000 | (r & blue_mask) | (tg & green_mask) | (tb & red_mask);
+ }
+#endif
+ const int tr = r << red_shift;
+ return 0xff000000 | (b & blue_mask) | (tg & green_mask) | (tr & red_mask);
+ }
+ }
+ }
+ //XXX
+ //return qt_screen->alloc(qRed(rgb), qGreen(rgb), qBlue(rgb));
+ return 0;
+}
+
+const QColor QColormap::colorAt(uint pixel) const
+{
+ if (d->mode == Direct) {
+ if (d->depth == 16) {
+ pixel = qt_conv16ToRgb(pixel);
+ }
+ const int red_shift = 16;
+ const int green_shift = 8;
+ const int red_mask = 0xff0000;
+ const int green_mask = 0x00ff00;
+ const int blue_mask = 0x0000ff;
+#ifdef QT_QWS_DEPTH_32_BGR
+ if (qt_screen->pixelType() == QScreen::BGRPixel) {
+ return QColor((pixel & blue_mask),
+ (pixel & green_mask) >> green_shift,
+ (pixel & red_mask) >> red_shift);
+ }
+#endif
+ return QColor((pixel & red_mask) >> red_shift,
+ (pixel & green_mask) >> green_shift,
+ (pixel & blue_mask));
+ }
+#if 0 // XXX
+ Q_ASSERT_X(int(pixel) < qt_screen->numCols(), "QColormap::colorAt", "pixel out of bounds of palette");
+ return QColor(qt_screen->clut()[pixel]);
+#endif
+ return QColor();
+}
+
+const QVector<QColor> QColormap::colormap() const
+{
+ return QVector<QColor>();
+}
+
+QColormap &QColormap::operator=(const QColormap &colormap)
+{ qAtomicAssign(d, colormap.d); return *this; }
+
+QT_END_NAMESPACE
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