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/*
* Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this program; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "QtWebPageSGNode.h"
#include "CoordinatedGraphicsScene.h"
#include "WebPageProxy.h"
#include <QtGui/QPolygonF>
#include <QtQuick/QSGSimpleRectNode>
#include <WebCore/TransformationMatrix.h>
#if QT_VERSION >= QT_VERSION_CHECK(5, 8, 0)
#include <QtQuick/QSGRenderNode>
#else
#include <QtQuick/private/qsgrendernode_p.h>
#endif
using namespace WebCore;
namespace WebKit {
class ContentsSGNode final : public QSGRenderNode {
public:
ContentsSGNode(PassRefPtr<CoordinatedGraphicsScene> scene)
: m_scene(scene)
{
coordinatedGraphicsScene()->setActive(true);
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 8, 0)
StateFlags changedStates() const final
{
return StateFlags(StencilState) | ColorState | BlendState;
}
void render(const RenderState* state) final
{
renderInternal(state->projectionMatrix());
}
#else
StateFlags changedStates() final
{
return StateFlags(StencilState) | ColorState | BlendState;
}
void render(const RenderState& state) final
{
renderInternal(state.projectionMatrix);
}
#endif // QT_VERSION >= QT_VERSION_CHECK(5, 8, 0)
void renderInternal(const QMatrix4x4* projection)
{
TransformationMatrix renderMatrix;
if (pageNode()->devicePixelRatio() != 1.0) {
renderMatrix.scale(pageNode()->devicePixelRatio());
if (matrix())
renderMatrix.multiply(*matrix());
} else if (matrix())
renderMatrix = *matrix();
// When rendering to an intermediate surface, Qt will
// mirror the projection matrix to fit on the destination coordinate system.
bool mirrored = projection && (*projection)(0, 0) * (*projection)(1, 1) - (*projection)(0, 1) * (*projection)(1, 0) > 0;
// FIXME: Support non-rectangular clippings.
coordinatedGraphicsScene()->paintToCurrentGLContext(renderMatrix, inheritedOpacity(), clipRect(),
pageNode()->page().pageExtendedBackgroundColor(), pageNode()->page().drawsBackground(), FloatPoint(),
mirrored ? TextureMapper::PaintingMirrored : 0);
}
void releaseResources()
#if QT_VERSION >= QT_VERSION_CHECK(5, 8, 0)
final
#endif
{
coordinatedGraphicsScene()->purgeGLResources();
}
~ContentsSGNode()
{
releaseResources();
}
const QtWebPageSGNode* pageNode() const
{
const QtWebPageSGNode* parent = static_cast<QtWebPageSGNode*>(this->parent());
ASSERT(parent);
return parent;
}
CoordinatedGraphicsScene* coordinatedGraphicsScene() const { return m_scene.get(); }
private:
QRectF clipRect() const
{
// Start with an invalid rect.
QRectF resultRect(0, 0, -1, -1);
for (const QSGClipNode* clip = clipList(); clip; clip = clip->clipList()) {
QMatrix4x4 clipMatrix;
if (pageNode()->devicePixelRatio() != 1.0) {
clipMatrix.scale(pageNode()->devicePixelRatio());
if (clip->matrix())
clipMatrix *= (*clip->matrix());
} else if (clip->matrix())
clipMatrix = *clip->matrix();
QRectF currentClip;
if (clip->isRectangular())
currentClip = clipMatrix.mapRect(clip->clipRect());
else {
const QSGGeometry* geometry = clip->geometry();
// Assume here that clipNode has only coordinate data.
const QSGGeometry::Point2D* geometryPoints = geometry->vertexDataAsPoint2D();
// Clip region should be at least triangle to make valid clip.
if (geometry->vertexCount() < 3)
continue;
QPolygonF polygon;
for (int i = 0; i < geometry->vertexCount(); i++)
polygon.append(clipMatrix.map(QPointF(geometryPoints[i].x, geometryPoints[i].y)));
currentClip = polygon.boundingRect();
}
if (currentClip.isEmpty())
continue;
if (resultRect.isValid())
resultRect &= currentClip;
else
resultRect = currentClip;
}
return resultRect;
}
RefPtr<CoordinatedGraphicsScene> m_scene;
};
QtWebPageSGNode::QtWebPageSGNode(WebPageProxy& page)
: m_page(page)
, m_contentsNode(0)
, m_backgroundNode(new QSGSimpleRectNode)
, m_devicePixelRatio(1)
{
appendChildNode(m_backgroundNode);
}
void QtWebPageSGNode::setBackground(const QRectF& rect, const QColor& color)
{
m_backgroundNode->setRect(rect);
m_backgroundNode->setColor(color);
}
void QtWebPageSGNode::setScale(float scale)
{
QMatrix4x4 matrix;
matrix.scale(scale);
setMatrix(matrix);
}
void QtWebPageSGNode::setCoordinatedGraphicsScene(PassRefPtr<CoordinatedGraphicsScene> scene)
{
if (m_contentsNode && m_contentsNode->coordinatedGraphicsScene() == scene)
return;
delete m_contentsNode;
m_contentsNode = new ContentsSGNode(scene);
// This sets the parent node of the content to QtWebPageSGNode.
appendChildNode(m_contentsNode);
}
} // namespace WebKit
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