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Diffstat (limited to 'src/platformsupport/graphics/qrasterbackingstore.cpp')
-rw-r--r-- | src/platformsupport/graphics/qrasterbackingstore.cpp | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/platformsupport/graphics/qrasterbackingstore.cpp b/src/platformsupport/graphics/qrasterbackingstore.cpp new file mode 100644 index 0000000000..3b1a87b8cd --- /dev/null +++ b/src/platformsupport/graphics/qrasterbackingstore.cpp @@ -0,0 +1,110 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/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 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** 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 +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qrasterbackingstore_p.h" + +#include <QtGui/qpainter.h> + +QT_BEGIN_NAMESPACE + +QRasterBackingStore::QRasterBackingStore(QWindow *window) + : QPlatformBackingStore(window) +{ +} + +QRasterBackingStore::~QRasterBackingStore() +{ +} + +void QRasterBackingStore::resize(const QSize &size, const QRegion &staticContents) +{ + Q_UNUSED(staticContents); + + int windowDevicePixelRatio = window()->devicePixelRatio(); + QSize effectiveBufferSize = size * windowDevicePixelRatio; + + if (m_image.size() == effectiveBufferSize) + return; + + QImage::Format format = window()->format().hasAlpha() ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32; + m_image = QImage(effectiveBufferSize, format); + m_image.setDevicePixelRatio(windowDevicePixelRatio); + if (format == QImage::Format_ARGB32_Premultiplied) + m_image.fill(Qt::transparent); +} + +QPaintDevice *QRasterBackingStore::paintDevice() +{ + return &m_image; +} + +QImage QRasterBackingStore::toImage() const +{ + return m_image; +} + +bool QRasterBackingStore::scroll(const QRegion ®ion, int dx, int dy) +{ + if (window()->surfaceType() != QSurface::RasterSurface) + return false; + + extern void qt_scrollRectInImage(QImage &, const QRect &, const QPoint &); + + const qreal devicePixelRatio = m_image.devicePixelRatio(); + const QPoint delta(dx * devicePixelRatio, dy * devicePixelRatio); + + foreach (const QRect &rect, region.rects()) + qt_scrollRectInImage(m_image, QRect(rect.topLeft() * devicePixelRatio, rect.size() * devicePixelRatio), delta); + + return true; +} + +void QRasterBackingStore::beginPaint(const QRegion ®ion) +{ + if (!m_image.hasAlphaChannel()) + return; + + QPainter painter(&m_image); + painter.setCompositionMode(QPainter::CompositionMode_Source); + const QColor blank = Qt::transparent; + foreach (const QRect &rect, region.rects()) + painter.fillRect(rect, blank); +} + +QT_END_NAMESPACE |