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author | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2020-03-31 12:25:39 +0200 |
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committer | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2020-05-21 20:28:37 +0200 |
commit | f76161d61f14428a1dc2bd6024a523ebe46fdfea (patch) | |
tree | ff2e638f8d1f11880beedd219e7054ea218f2204 /src/gui/painting/qrasterbackingstore.cpp | |
parent | 2f05aa82e792089a249a0a77f1ae7e055cc90208 (diff) |
Move QRasterBackingStore to QtGui
Task-number: QTBUG-83255
Change-Id: I339173de6e109c5a9b9572972ba894c15053c034
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Diffstat (limited to 'src/gui/painting/qrasterbackingstore.cpp')
-rw-r--r-- | src/gui/painting/qrasterbackingstore.cpp | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/gui/painting/qrasterbackingstore.cpp b/src/gui/painting/qrasterbackingstore.cpp new file mode 100644 index 0000000000..a3ffe11d19 --- /dev/null +++ b/src/gui/painting/qrasterbackingstore.cpp @@ -0,0 +1,119 @@ +/**************************************************************************** +** +** 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/qbackingstore.h> +#include <QtGui/qpainter.h> + +#include <private/qhighdpiscaling_p.h> +#include <qpa/qplatformwindow.h> + +QT_BEGIN_NAMESPACE + +QRasterBackingStore::QRasterBackingStore(QWindow *window) + : QPlatformBackingStore(window) +{ +} + +QRasterBackingStore::~QRasterBackingStore() +{ +} + +void QRasterBackingStore::resize(const QSize &size, const QRegion &staticContents) +{ + Q_UNUSED(staticContents); + m_requestedSize = size; +} + +QImage::Format QRasterBackingStore::format() const +{ + if (window()->format().hasAlpha()) + return QImage::Format_ARGB32_Premultiplied; + else + return QImage::Format_RGB32; +} + +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); + + for (const QRect &rect : region) + qt_scrollRectInImage(m_image, QRect(rect.topLeft() * devicePixelRatio, rect.size() * devicePixelRatio), delta); + + return true; +} + +void QRasterBackingStore::beginPaint(const QRegion ®ion) +{ + qreal nativeWindowDevicePixelRatio = window()->handle()->devicePixelRatio(); + QSize effectiveBufferSize = m_requestedSize * nativeWindowDevicePixelRatio; + if (m_image.devicePixelRatio() != nativeWindowDevicePixelRatio || m_image.size() != effectiveBufferSize) { + m_image = QImage(effectiveBufferSize, format()); + m_image.setDevicePixelRatio(nativeWindowDevicePixelRatio); + if (m_image.format() == QImage::Format_ARGB32_Premultiplied) + m_image.fill(Qt::transparent); + } + + if (!m_image.hasAlphaChannel()) + return; + + QPainter painter(&m_image); + painter.setCompositionMode(QPainter::CompositionMode_Source); + for (const QRect &rect : region) + painter.fillRect(rect, Qt::transparent); +} + +QT_END_NAMESPACE |