1 files changed, 265 insertions, 0 deletions
diff --git a/src/plugins/scenegraph/softwarecontext/renderablenodeupdater.cpp b/src/plugins/scenegraph/softwarecontext/renderablenodeupdater.cpp
new file mode 100644
index 0000000000..114bd07584
--- /dev/null
+++ b/src/plugins/scenegraph/softwarecontext/renderablenodeupdater.cpp
@@ -0,0 +1,265 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick 2D Renderer module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) 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.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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "renderablenodeupdater.h"
+
+#include "abstractsoftwarerenderer.h"
+#include "imagenode.h"
+#include "rectanglenode.h"
+#include "glyphnode.h"
+#include "ninepatchnode.h"
+#include "painternode.h"
+#include "pixmaptexture.h"
+
+#include <QtQuick/QSGSimpleRectNode>
+#include <QtQuick/qsgsimpletexturenode.h>
+
+namespace SoftwareContext {
+
+RenderableNodeUpdater::RenderableNodeUpdater(AbstractSoftwareRenderer *renderer)
+    : m_renderer(renderer)
+{
+    m_opacityState.push(1.0f);
+    // Invalid RectF by default for no clip
+    m_clipState.push(QRectF(0.0f, 0.0f, -1.0f, -1.0f));
+    m_transformState.push(QTransform());
+}
+
+RenderableNodeUpdater::~RenderableNodeUpdater()
+{
+
+}
+
+bool RenderableNodeUpdater::visit(QSGTransformNode *node)
+{
+    m_transformState.push(node->matrix().toTransform() * m_transformState.top());
+    m_stateMap[node] = currentState(node);
+    return true;
+}
+
+void RenderableNodeUpdater::endVisit(QSGTransformNode *)
+{
+    m_transformState.pop();
+}
+
+bool RenderableNodeUpdater::visit(QSGClipNode *node)
+{
+    // Make sure to translate the clip rect into world coordinates
+    if (!m_clipState.top().isValid())
+        m_clipState.push(m_transformState.top().mapRect(node->clipRect()));
+    else
+        m_clipState.push(m_transformState.top().mapRect(node->clipRect()).intersected(m_clipState.top()));
+    m_stateMap[node] = currentState(node);
+    return true;
+}
+
+void RenderableNodeUpdater::endVisit(QSGClipNode *)
+{
+    m_clipState.pop();
+}
+
+bool RenderableNodeUpdater::visit(QSGGeometryNode *node)
+{
+    if (QSGSimpleRectNode *rectNode = dynamic_cast<QSGSimpleRectNode *>(node)) {
+        return updateRenderableNode(RenderableNode::SimpleRect, rectNode);
+    } else if (QSGSimpleTextureNode *tn = dynamic_cast<QSGSimpleTextureNode *>(node)) {
+        return updateRenderableNode(RenderableNode::SimpleTexture, tn);
+    } else {
+        // We dont know, so skip
+        return false;
+    }
+}
+
+void RenderableNodeUpdater::endVisit(QSGGeometryNode *)
+{
+}
+
+bool RenderableNodeUpdater::visit(QSGOpacityNode *node)
+{
+    m_opacityState.push(m_opacityState.top() * node->opacity());
+    m_stateMap[node] = currentState(node);
+    return true;
+}
+
+void RenderableNodeUpdater::endVisit(QSGOpacityNode *)
+{
+    m_opacityState.pop();
+}
+
+bool RenderableNodeUpdater::visit(QSGImageNode *node)
+{
+    return updateRenderableNode(RenderableNode::Image, node);
+}
+
+void RenderableNodeUpdater::endVisit(QSGImageNode *)
+{
+}
+
+bool RenderableNodeUpdater::visit(QSGPainterNode *node)
+{
+    return updateRenderableNode(RenderableNode::Painter, node);
+}
+
+void RenderableNodeUpdater::endVisit(QSGPainterNode *)
+{
+}
+
+bool RenderableNodeUpdater::visit(QSGRectangleNode *node)
+{
+    return updateRenderableNode(RenderableNode::Rectangle, node);
+}
+
+void RenderableNodeUpdater::endVisit(QSGRectangleNode *)
+{
+}
+
+bool RenderableNodeUpdater::visit(QSGGlyphNode *node)
+{
+    return updateRenderableNode(RenderableNode::Glyph, node);
+}
+
+void RenderableNodeUpdater::endVisit(QSGGlyphNode *)
+{
+}
+
+bool RenderableNodeUpdater::visit(QSGNinePatchNode *node)
+{
+    return updateRenderableNode(RenderableNode::NinePatch, node);
+}
+
+void RenderableNodeUpdater::endVisit(QSGNinePatchNode *)
+{
+}
+
+bool RenderableNodeUpdater::visit(QSGRootNode *node)
+{
+    m_stateMap[node] = currentState(node);
+    return true;
+}
+
+void RenderableNodeUpdater::endVisit(QSGRootNode *)
+{
+}
+
+void RenderableNodeUpdater::updateNodes(QSGNode *node, bool isNodeRemoved)
+{
+    m_opacityState.clear();
+    m_clipState.clear();
+    m_transformState.clear();
+
+    auto parentNode = node->parent();
+    // If the node was deleted, it will have no parent
+    // check if the state map has the previous parent
+    if ((!parentNode || isNodeRemoved ) && m_stateMap.contains(node))
+        parentNode = m_stateMap[node].parent;
+
+    // If we find a parent, use its state for updating the new children
+    if (parentNode && m_stateMap.contains(parentNode)) {
+        auto state = m_stateMap[parentNode];
+        m_opacityState.push(state.opacity);
+        m_transformState.push(state.transform);
+        m_clipState.push(state.clip);
+
+    } else {
+        // There is no parent, and no previous parent, so likely a root node
+        m_opacityState.push(1.0f);
+        m_transformState.push(QTransform());
+        m_clipState.push(QRectF(0.0f, 0.0f, -1.0f, -1.0f));
+    }
+
+    // If the node is being removed, then cleanup the state data
+    // Then just visit the children without visiting the now removed node
+    if (isNodeRemoved) {
+        m_stateMap.remove(node);
+        return;
+    }
+
+    // Visit the current node itself first
+    switch (node->type()) {
+    case QSGNode::ClipNodeType: {
+        QSGClipNode *c = static_cast<QSGClipNode*>(node);
+        if (visit(c))
+            visitChildren(c);
+        endVisit(c);
+        break;
+    }
+    case QSGNode::TransformNodeType: {
+        QSGTransformNode *c = static_cast<QSGTransformNode*>(node);
+        if (visit(c))
+            visitChildren(c);
+        endVisit(c);
+        break;
+    }
+    case QSGNode::OpacityNodeType: {
+        QSGOpacityNode *c = static_cast<QSGOpacityNode*>(node);
+        if (visit(c))
+            visitChildren(c);
+        endVisit(c);
+        break;
+    }
+    case QSGNode::GeometryNodeType: {
+        if (node->flags() & QSGNode::IsVisitableNode) {
+            QSGVisitableNode *v = static_cast<QSGVisitableNode*>(node);
+            v->accept(this);
+        } else {
+            QSGGeometryNode *c = static_cast<QSGGeometryNode*>(node);
+            if (visit(c))
+                visitChildren(c);
+            endVisit(c);
+        }
+        break;
+    }
+    case QSGNode::RootNodeType: {
+        QSGRootNode *root = static_cast<QSGRootNode*>(node);
+        if (visit(root))
+            visitChildren(root);
+        endVisit(root);
+        break;
+    }
+    case QSGNode::BasicNodeType: {
+            visitChildren(node);
+        break;
+    }
+    default:
+        Q_UNREACHABLE();
+        break;
+    }
+}
+
+RenderableNodeUpdater::NodeState RenderableNodeUpdater::currentState(QSGNode *node) const
+{
+    NodeState state;
+    state.opacity = m_opacityState.top();
+    state.clip = m_clipState.top();
+    state.transform = m_transformState.top();
+    state.parent = node->parent();
+    return state;
+}
+
+} // namespace