diff options
Diffstat (limited to 'src/plugins/scenegraph/openvg/qsgopenvglayer.cpp')
| -rw-r--r-- | src/plugins/scenegraph/openvg/qsgopenvglayer.cpp | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/src/plugins/scenegraph/openvg/qsgopenvglayer.cpp b/src/plugins/scenegraph/openvg/qsgopenvglayer.cpp new file mode 100644 index 0000000000..047539d431 --- /dev/null +++ b/src/plugins/scenegraph/openvg/qsgopenvglayer.cpp @@ -0,0 +1,315 @@ +/**************************************************************************** +** +** 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 "qsgopenvglayer.h" +#include "qsgopenvgrenderer_p.h" +#include "qsgopenvgcontext_p.h" + +QT_BEGIN_NAMESPACE + +QSGOpenVGLayer::QSGOpenVGLayer(QSGRenderContext *renderContext) + : m_item(nullptr) + , m_renderer(nullptr) + , m_device_pixel_ratio(1) + , m_mirrorHorizontal(false) + , m_mirrorVertical(false) + , m_live(true) + , m_grab(true) + , m_recursive(false) + , m_dirtyTexture(true) + , m_offscreenSurface(nullptr) + , m_secondaryOffscreenSurface(nullptr) +{ + m_context = static_cast<QSGOpenVGRenderContext*>(renderContext); +} + +QSGOpenVGLayer::~QSGOpenVGLayer() +{ + invalidated(); +} + +int QSGOpenVGLayer::textureId() const +{ + if (m_offscreenSurface) + return static_cast<int>(m_offscreenSurface->image()); + else + return 0; +} + +QSize QSGOpenVGLayer::textureSize() const +{ + if (m_offscreenSurface) { + return m_offscreenSurface->size(); + } + + return QSize(); +} + +bool QSGOpenVGLayer::hasAlphaChannel() const +{ + return true; +} + +bool QSGOpenVGLayer::hasMipmaps() const +{ + return false; +} + +void QSGOpenVGLayer::bind() +{ +} + +bool QSGOpenVGLayer::updateTexture() +{ + bool doGrab = (m_live || m_grab) && m_dirtyTexture; + if (doGrab) + grab(); + if (m_grab) + emit scheduledUpdateCompleted(); + m_grab = false; + return doGrab; +} + +void QSGOpenVGLayer::setItem(QSGNode *item) +{ + if (item == m_item) + return; + m_item = item; + + if (m_live && !m_item) { + delete m_offscreenSurface; + delete m_secondaryOffscreenSurface; + m_offscreenSurface = nullptr; + m_secondaryOffscreenSurface = nullptr; + } + + markDirtyTexture(); +} + +void QSGOpenVGLayer::setRect(const QRectF &rect) +{ + if (rect == m_rect) + return; + m_rect = rect; + markDirtyTexture(); +} + +void QSGOpenVGLayer::setSize(const QSize &size) +{ + if (size == m_size) + return; + m_size = size; + + if (m_live && m_size.isNull()) { + delete m_offscreenSurface; + delete m_secondaryOffscreenSurface; + m_offscreenSurface = nullptr; + m_secondaryOffscreenSurface = nullptr; + } + + markDirtyTexture(); +} + +void QSGOpenVGLayer::scheduleUpdate() +{ + if (m_grab) + return; + m_grab = true; + if (m_dirtyTexture) { + emit updateRequested(); + } +} + +QImage QSGOpenVGLayer::toImage() const +{ + return m_offscreenSurface->readbackQImage(); +} + +void QSGOpenVGLayer::setLive(bool live) +{ + if (live == m_live) + return; + m_live = live; + + if (m_live && (!m_item || m_size.isNull())) { + delete m_offscreenSurface; + delete m_secondaryOffscreenSurface; + m_offscreenSurface = nullptr; + m_secondaryOffscreenSurface = nullptr; + } + + markDirtyTexture(); +} + +void QSGOpenVGLayer::setRecursive(bool recursive) +{ + m_recursive = recursive; +} + +void QSGOpenVGLayer::setFormat(uint format) +{ + Q_UNUSED(format) +} + +void QSGOpenVGLayer::setHasMipmaps(bool mipmap) +{ + Q_UNUSED(mipmap) +} + +void QSGOpenVGLayer::setDevicePixelRatio(qreal ratio) +{ + m_device_pixel_ratio = ratio; +} + +void QSGOpenVGLayer::setMirrorHorizontal(bool mirror) +{ + if (m_mirrorHorizontal == mirror) + return; + m_mirrorHorizontal = mirror; + markDirtyTexture(); +} + +void QSGOpenVGLayer::setMirrorVertical(bool mirror) +{ + if (m_mirrorVertical == mirror) + return; + m_mirrorVertical = mirror; + markDirtyTexture(); +} + +void QSGOpenVGLayer::markDirtyTexture() +{ + m_dirtyTexture = true; + if (m_live || m_grab) { + emit updateRequested(); + } +} + +void QSGOpenVGLayer::invalidated() +{ + delete m_offscreenSurface; + delete m_secondaryOffscreenSurface; + delete m_renderer; + m_renderer = nullptr; + m_offscreenSurface = nullptr; + m_secondaryOffscreenSurface = nullptr; +} + +void QSGOpenVGLayer::grab() +{ + if (!m_item || m_size.isNull()) { + delete m_offscreenSurface; + delete m_secondaryOffscreenSurface; + m_offscreenSurface = nullptr; + m_secondaryOffscreenSurface = nullptr; + 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 QSGOpenVGRenderer(m_context); + connect(m_renderer, SIGNAL(sceneGraphChanged()), this, SLOT(markDirtyTexture())); + } + m_renderer->setDevicePixelRatio(m_device_pixel_ratio); + m_renderer->setRootNode(static_cast<QSGRootNode *>(root)); + + bool deleteOffscreenSurfaceLater = false; + if (m_offscreenSurface == nullptr || m_offscreenSurface->size() != m_size ) { + if (m_recursive) { + deleteOffscreenSurfaceLater = true; + delete m_secondaryOffscreenSurface; + m_secondaryOffscreenSurface = new QOpenVGOffscreenSurface(m_size); + } else { + delete m_offscreenSurface; + delete m_secondaryOffscreenSurface; + m_offscreenSurface = new QOpenVGOffscreenSurface(m_size); + m_secondaryOffscreenSurface = nullptr; + } + } + + if (m_recursive && !m_secondaryOffscreenSurface) + m_secondaryOffscreenSurface = new QOpenVGOffscreenSurface(m_size); + + // 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->setProjectionMatrixToRect(mirrored); + m_renderer->setClearColor(Qt::transparent); + + + if (m_recursive) + m_secondaryOffscreenSurface->makeCurrent(); + else + m_offscreenSurface->makeCurrent(); + + m_renderer->renderScene(); + + // Make the previous surface and context active again + if (m_recursive) { + if (deleteOffscreenSurfaceLater) { + delete m_offscreenSurface; + m_offscreenSurface = new QOpenVGOffscreenSurface(m_size); + } + m_secondaryOffscreenSurface->doneCurrent(); + qSwap(m_offscreenSurface, m_secondaryOffscreenSurface); + } else { + m_offscreenSurface->doneCurrent(); + } + + 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 |