| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtQuick module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** General Public License version 3 as published by the Free Software |
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| ** |
| ** 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 |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| #include "qsgopenvglayer.h" |
| #include "qsgopenvgrenderer_p.h" |
| #include "qsgopenvgcontext_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| QSGOpenVGLayer::QSGOpenVGLayer(QSGRenderContext *renderContext) |
| : QSGLayer(*(new QSGOpenVGLayerPrivate)) |
| , 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'. |
| } |
| |
| int QSGOpenVGLayerPrivate::comparisonKey() const |
| { |
| return 0; |
| } |
| |
| QT_END_NAMESPACE |