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Diffstat (limited to 'src/quick/scenegraph/adaptations/software/qsgsoftwarelayer.cpp')
-rw-r--r-- | src/quick/scenegraph/adaptations/software/qsgsoftwarelayer.cpp | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarelayer.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarelayer.cpp new file mode 100644 index 0000000000..7020283898 --- /dev/null +++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarelayer.cpp @@ -0,0 +1,261 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQuick module 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 "qsgsoftwarelayer_p.h" + +#include "qsgsoftwarecontext_p.h" +#include "qsgsoftwarepixmaprenderer_p.h" + +QT_BEGIN_NAMESPACE + +QSGSoftwareLayer::QSGSoftwareLayer(QSGRenderContext *renderContext) + : m_item(0) + , m_context(renderContext) + , m_renderer(0) + , m_device_pixel_ratio(1) + , m_mirrorHorizontal(false) + , m_mirrorVertical(false) + , m_live(true) + , m_grab(true) + , m_recursive(false) + , m_dirtyTexture(true) +{ + +} + +QSGSoftwareLayer::~QSGSoftwareLayer() +{ + invalidated(); +} + +int QSGSoftwareLayer::textureId() const +{ + return 0; +} + +QSize QSGSoftwareLayer::textureSize() const +{ + return m_pixmap.size(); +} + +bool QSGSoftwareLayer::hasAlphaChannel() const +{ + return m_pixmap.hasAlphaChannel(); +} + +bool QSGSoftwareLayer::hasMipmaps() const +{ + return false; +} + +void QSGSoftwareLayer::bind() +{ +} + +bool QSGSoftwareLayer::updateTexture() +{ + bool doGrab = (m_live || m_grab) && m_dirtyTexture; + if (doGrab) + grab(); + if (m_grab) + emit scheduledUpdateCompleted(); + m_grab = false; + return doGrab; +} + +void QSGSoftwareLayer::setItem(QSGNode *item) +{ + if (item == m_item) + return; + m_item = item; + + if (m_live && !m_item) + m_pixmap = QPixmap(); + + markDirtyTexture(); +} + +void QSGSoftwareLayer::setRect(const QRectF &rect) +{ + if (rect == m_rect) + return; + m_rect = rect; + markDirtyTexture(); +} + +void QSGSoftwareLayer::setSize(const QSize &size) +{ + if (size == m_size) + return; + m_size = size; + + if (m_live && m_size.isNull()) + m_pixmap = QPixmap(); + + markDirtyTexture(); +} + +void QSGSoftwareLayer::scheduleUpdate() +{ + if (m_grab) + return; + m_grab = true; + if (m_dirtyTexture) { + emit updateRequested(); + } +} + +QImage QSGSoftwareLayer::toImage() const +{ + return m_pixmap.toImage(); +} + +void QSGSoftwareLayer::setLive(bool live) +{ + if (live == m_live) + return; + m_live = live; + + if (m_live && (!m_item || m_size.isNull())) + m_pixmap = QPixmap(); + + markDirtyTexture(); +} + +void QSGSoftwareLayer::setRecursive(bool recursive) +{ + m_recursive = recursive; +} + +void QSGSoftwareLayer::setFormat(uint) +{ +} + +void QSGSoftwareLayer::setHasMipmaps(bool) +{ +} + +void QSGSoftwareLayer::setDevicePixelRatio(qreal ratio) +{ + m_device_pixel_ratio = ratio; +} + +void QSGSoftwareLayer::setMirrorHorizontal(bool mirror) +{ + if (m_mirrorHorizontal == mirror) + return; + m_mirrorHorizontal = mirror; + markDirtyTexture(); +} + +void QSGSoftwareLayer::setMirrorVertical(bool mirror) +{ + if (m_mirrorVertical == mirror) + return; + m_mirrorVertical = mirror; + markDirtyTexture(); +} + +void QSGSoftwareLayer::markDirtyTexture() +{ + m_dirtyTexture = true; + if (m_live || m_grab) { + emit updateRequested(); + } +} + +void QSGSoftwareLayer::invalidated() +{ + delete m_renderer; + m_renderer = 0; +} + +void QSGSoftwareLayer::grab() +{ + if (!m_item || m_size.isNull()) { + m_pixmap = QPixmap(); + m_dirtyTexture = false; + return; + } + QSGNode *root = m_item; + while (root->firstChild() && root->type() != QSGNode::RootNodeType) + root = root->firstChild(); + if (root->type() != QSGNode::RootNodeType) + return; + + if (!m_renderer) { + m_renderer = new QSGSoftwarePixmapRenderer(m_context); + connect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture())); + } + m_renderer->setDevicePixelRatio(m_device_pixel_ratio); + m_renderer->setRootNode(static_cast<QSGRootNode *>(root)); + + if (m_pixmap.size() != m_size) { + m_pixmap = QPixmap(m_size); + m_pixmap.setDevicePixelRatio(m_device_pixel_ratio); + // This fill here is wasteful, but necessary because it is the only way + // to force a QImage based pixmap to have an alpha channel. + m_pixmap.fill(Qt::transparent); + } + + // Render texture. + root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip and opacity update. + m_renderer->nodeChanged(root, QSGNode::DirtyForceUpdate); // Force render list update. + + m_dirtyTexture = false; + + m_renderer->setDeviceRect(m_size); + m_renderer->setViewportRect(m_size); + QRect mirrored(m_mirrorHorizontal ? m_rect.right() * m_device_pixel_ratio : m_rect.left() * m_device_pixel_ratio, + m_mirrorVertical ? m_rect.top() * m_device_pixel_ratio : m_rect.bottom() * m_device_pixel_ratio, + m_mirrorHorizontal ? -m_rect.width() * m_device_pixel_ratio : m_rect.width() * m_device_pixel_ratio, + m_mirrorVertical ? m_rect.height() * m_device_pixel_ratio : -m_rect.height() * m_device_pixel_ratio); + m_renderer->setProjectionRect(mirrored); + m_renderer->setClearColor(Qt::transparent); + + m_renderer->renderScene(); + m_renderer->render(&m_pixmap); + + root->markDirty(QSGNode::DirtyForceUpdate); // Force matrix, clip, opacity and render list update. + + if (m_recursive) + markDirtyTexture(); // Continuously update if 'live' and 'recursive'. +} + +QT_END_NAMESPACE |