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// 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