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103 lines
3.1 KiB
103 lines
3.1 KiB
/******************************************************************** |
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KWin - the KDE window manager |
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This file is part of the KDE project. |
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org> |
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Copyright (C) 2019 Vlad Zahorodnii <vlad.zahorodnii@kde.org> |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*********************************************************************/ |
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#include "backingstore.h" |
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#include "window.h" |
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#include "internal_client.h" |
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namespace KWin |
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{ |
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namespace QPA |
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{ |
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BackingStore::BackingStore(QWindow *window) |
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: QPlatformBackingStore(window) |
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{ |
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} |
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BackingStore::~BackingStore() = default; |
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QPaintDevice *BackingStore::paintDevice() |
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{ |
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return &m_backBuffer; |
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} |
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void BackingStore::resize(const QSize &size, const QRegion &staticContents) |
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{ |
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Q_UNUSED(staticContents) |
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if (m_backBuffer.size() == size) { |
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return; |
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} |
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const QPlatformWindow *platformWindow = static_cast<QPlatformWindow *>(window()->handle()); |
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const qreal devicePixelRatio = platformWindow->devicePixelRatio(); |
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m_backBuffer = QImage(size * devicePixelRatio, QImage::Format_ARGB32_Premultiplied); |
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m_backBuffer.setDevicePixelRatio(devicePixelRatio); |
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m_frontBuffer = QImage(size * devicePixelRatio, QImage::Format_ARGB32_Premultiplied); |
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m_frontBuffer.setDevicePixelRatio(devicePixelRatio); |
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} |
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static void blitImage(const QImage &source, QImage &target, const QRect &rect) |
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{ |
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Q_ASSERT(source.format() == QImage::Format_ARGB32_Premultiplied); |
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Q_ASSERT(target.format() == QImage::Format_ARGB32_Premultiplied); |
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const int devicePixelRatio = target.devicePixelRatio(); |
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const int x = rect.x() * devicePixelRatio; |
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const int y = rect.y() * devicePixelRatio; |
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const int width = rect.width() * devicePixelRatio; |
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const int height = rect.height() * devicePixelRatio; |
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for (int i = y; i < y + height; ++i) { |
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const uint32_t *in = reinterpret_cast<const uint32_t *>(source.scanLine(i)); |
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uint32_t *out = reinterpret_cast<uint32_t *>(target.scanLine(i)); |
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std::copy(in + x, in + x + width, out + x); |
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} |
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} |
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static void blitImage(const QImage &source, QImage &target, const QRegion ®ion) |
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{ |
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for (const QRect &rect : region) { |
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blitImage(source, target, rect); |
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} |
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} |
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void BackingStore::flush(QWindow *window, const QRegion ®ion, const QPoint &offset) |
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{ |
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Q_UNUSED(offset) |
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Window *platformWindow = static_cast<Window *>(window->handle()); |
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InternalClient *client = platformWindow->client(); |
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if (!client) { |
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return; |
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} |
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blitImage(m_backBuffer, m_frontBuffer, region); |
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client->present(m_frontBuffer, region); |
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} |
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} |
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}
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