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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt scene graph research project.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef RENDERER_H
#define RENDERER_H
#include <qset.h>
#include <qhash.h>
#include <qgltexture2d.h>
#include <qmatrix4x4stack.h>
#include <qarray.h>
#include <qglfunctions.h>
#include <qglshaderprogram.h>
#include "node.h"
class AbstractEffectProgram;
struct AbstractEffectType;
class QGLFramebufferObject;
class TextureReference;
class Bindable
{
public:
virtual ~Bindable() { }
virtual void bind() const = 0;
};
class BindableFbo : public Bindable
{
public:
BindableFbo(QGLContext *ctx, QGLFramebufferObject *fbo);
virtual void bind() const;
private:
QGLContext *m_ctx;
QGLFramebufferObject *m_fbo;
};
class QT_SCENEGRAPH_EXPORT Renderer : public QObject, public QGLFunctions
{
Q_OBJECT
public:
enum Update
{
UpdateColor = 0x00000001,
UpdateModelViewMatrix = 0x00000002,
UpdateProjectionMatrix = 0x00000004,
UpdateMatrices = 0x00000006,
UpdateLights = 0x00000008,
UpdateMaterials = 0x00000010,
UpdateAll = 0x7FFFFFFF
};
Q_DECLARE_FLAGS(Updates, Update);
enum ClipType
{
NoClip,
ScissorClip,
StencilClip
};
Renderer();
virtual ~Renderer();
void setRootNode(RootNode *node);
RootNode *rootNode() const { return m_root_node; }
void setDeviceRect(const QRect &rect) { m_device_rect = rect; }
inline void setDeviceRect(const QSize &size) { setDeviceRect(QRect(QPoint(), size)); }
QRect deviceRect() const { return m_device_rect; }
QMatrix4x4Stack &projectionMatrix() { return m_projectionMatrix; }
QMatrix4x4Stack &modelViewMatrix() { return m_modelViewMatrix; }
void setProjectMatrixToDeviceRect();
void setProjectMatrixToRect(const QRectF &rect);
void setProjectMatrix(const QMatrix4x4 &matrix) { m_projection_matrix = matrix; }
QMatrix4x4 projectMatrix() const { return m_projection_matrix; }
QMatrix4x4 combinedMatrix() const { return m_projectionMatrix.top() * m_modelViewMatrix.top(); }
void setClearColor(const QColor &color);
void setTexture(int unit, const TextureReference *texture);
void setTexture(const TextureReference *texture) { setTexture(0, texture); }
void renderScene();
void renderScene(const Bindable &bindable);
virtual void nodeChanged(Node *node, Node::DirtyFlags flags);
virtual void materialChanged(GeometryNode *node, AbstractEffect *from, AbstractEffect *to);
public slots:
signals:
void sceneGraphChanged(); // Add, remove, ChangeFlags changes...
protected:
virtual void render() = 0;
Renderer::ClipType updateStencilClip(const ClipNode *clip);
AbstractEffectProgram *prepareMaterial(AbstractEffect *material);
virtual void preprocess();
void addNodesToPreprocess(Node *node);
void removeNodesToPreprocess(Node *node);
QColor m_clear_color;
QMatrix4x4Stack m_projectionMatrix;
QMatrix4x4Stack m_modelViewMatrix;
private:
RootNode *m_root_node;
QRect m_device_rect;
QHash<AbstractEffectType *, AbstractEffectProgram *> m_materials;
QSet<Node *> m_nodes_to_preprocess;
QSet<Node *> m_nodes_to_update;
QMatrix4x4 m_projection_matrix;
QGLShaderProgram m_clip_program;
int m_clip_matrix_id;
bool m_changed_emitted;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(Renderer::Updates)
#endif // RENDERER_H
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