| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtWidgets module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** |
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| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #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; |
| if (Q_UNLIKELY(!QGuiApplication::primaryScreen())) { |
| qWarning("no screens available, assuming 24-bit color"); |
| screenMap->depth = 24; |
| screenMap->mode = QColormap::Direct; |
| return; |
| } |
| 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 |