Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #include "qsgopenvglayer.h"
++ #include "qsgopenvgrenderer_p.h"
++ #include "qsgopenvgcontext_p.h"
++
++ QT_BEGIN_NAMESPACE
++
++ QSGOpenVGLayer::QSGOpenVGLayer(QSGRenderContext *renderContext)
++ : QSGLayer(*(new QSGTexturePrivate(this)))
++ , 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();
++ }
++
++ qint64 QSGOpenVGLayer::comparisonKey() 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;
++ }
++
++ 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