Revision control
++ // Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++
++ #include "buffer_p.h"
++ #include <Qt3DCore/private/qbuffer_p.h>
++ #include <Qt3DRender/private/buffermanager_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ namespace Qt3DRender {
++ namespace Render {
++
++ Buffer::Buffer()
++ : BackendNode(QBackendNode::ReadWrite)
++ , m_usage(Qt3DCore::QBuffer::StaticDraw)
++ , m_bufferDirty(false)
++ , m_access(Qt3DCore::QBuffer::Write)
++ , m_manager(nullptr)
++ {
++ // Maybe it could become read write if we want to inform
++ // the frontend QBuffer node of any backend issue
++ }
++
++ Buffer::~Buffer()
++ {
++ }
++
++ void Buffer::cleanup()
++ {
++ m_usage = Qt3DCore::QBuffer::StaticDraw;
++ m_data.clear();
++ m_bufferUpdates.clear();
++ m_bufferDirty = false;
++ m_access = Qt3DCore::QBuffer::Write;
++ }
++
++
++ void Buffer::setManager(BufferManager *manager)
++ {
++ m_manager = manager;
++ }
++
++ //Called from th sendBufferJob
++ void Buffer::updateDataFromGPUToCPU(QByteArray data)
++ {
++ // Note: when this is called, data is what's currently in GPU memory
++ // so m_data shouldn't be reuploaded
++ m_data = data;
++ }
++
++ void Buffer::forceDataUpload()
++ {
++ // We push back an update with offset = -1
++ // As this is the way to force data to be loaded
++ Qt3DCore::QBufferUpdate updateNewData;
++ updateNewData.offset = -1;
++ m_bufferUpdates.clear(); //previous updates are pointless
++ m_bufferUpdates.push_back(updateNewData);
++ }
++
++ void Buffer::syncFromFrontEnd(const Qt3DCore::QNode *frontEnd, bool firstTime)
++ {
++ BackendNode::syncFromFrontEnd(frontEnd, firstTime);
++ const Qt3DCore::QBuffer *node = qobject_cast<const Qt3DCore::QBuffer *>(frontEnd);
++ if (!node)
++ return;
++
++ if (firstTime && m_manager != nullptr) {
++ m_manager->addBufferReference(peerId());
++ m_bufferDirty = true;
++ }
++
++ m_access = node->accessType();
++ if (m_usage != node->usage()) {
++ m_usage = node->usage();
++ m_bufferDirty = true;
++ }
++ {
++ const QVariant v = node->property(Qt3DCore::QBufferPrivate::UpdateDataPropertyName);
++
++ // Make sure we record data if it's the first time we are called
++ // or if we have no partial updates
++ if (firstTime || !v.isValid()){
++ const QByteArray newData = node->data();
++ const bool dirty = m_data != newData;
++ m_bufferDirty |= dirty;
++ m_data = newData;
++
++ // Since frontend applies partial updates to its m_data
++ // if we enter this code block, there's no problem in actually
++ // ignoring the partial updates
++ if (v.isValid())
++ const_cast<Qt3DCore::QBuffer *>(node)->setProperty(Qt3DCore::QBufferPrivate::UpdateDataPropertyName, {});
++
++ if (dirty && !m_data.isEmpty())
++ forceDataUpload();
++ } else if (v.isValid()) {
++ // Apply partial updates and record them to allow partial upload to the GPU
++ const QVariantList updateList = v.toList();
++ for (const QVariant &update : updateList) {
++ Qt3DCore::QBufferUpdate updateData = update.value<Qt3DCore::QBufferUpdate>();
++ m_data.replace(updateData.offset, updateData.data.size(), updateData.data);
++ m_bufferUpdates.push_back(updateData);
++ m_bufferDirty = true;
++ }
++
++ const_cast<Qt3DCore::QBuffer *>(node)->setProperty(Qt3DCore::QBufferPrivate::UpdateDataPropertyName, {});
++ }
++ }
++ markDirty(AbstractRenderer::BuffersDirty);
++ }
++
++ // Called by Renderer once the buffer has been uploaded to OpenGL
++ void Buffer::unsetDirty()
++ {
++ m_bufferDirty = false;
++ }
++
++ BufferFunctor::BufferFunctor(AbstractRenderer *renderer, BufferManager *manager)
++ : m_manager(manager)
++ , m_renderer(renderer)
++ {
++ }
++
++ Qt3DCore::QBackendNode *BufferFunctor::create(Qt3DCore::QNodeId id) const
++ {
++ Buffer *buffer = m_manager->getOrCreateResource(id);
++ buffer->setManager(m_manager);
++ buffer->setRenderer(m_renderer);
++ return buffer;
++ }
++
++ Qt3DCore::QBackendNode *BufferFunctor::get(Qt3DCore::QNodeId id) const
++ {
++ return m_manager->lookupResource(id);
++ }
++
++ void BufferFunctor::destroy(Qt3DCore::QNodeId id) const
++ {
++ if (m_manager->contains(id)) {
++ m_manager->removeBufferReference(id);
++ m_manager->releaseResource(id);
++ }
++ }
++
++ } // namespace Render
++ } // namespace Qt3DRender
++
++ QT_END_NAMESPACE