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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QUNIFORMVALUE_H
#define QUNIFORMVALUE_H
#include <QVariant>
#include <QByteArray>
#include <QVector>
// for RenderTexturePtr
#include <rendertextureprovider.h>
namespace Qt3D {
class QGraphicsContext;
namespace Render {
/**
* @brief The QUniformValue class - immutable storage of uniform value
* in the rendering backend.
*/
class QUniformValue
{
public:
enum Type {
Invalid = 0,
Int = 1,
UInt = 2,
Float = 3,
Double = 4,
Bool
};
QUniformValue();
QUniformValue(Type type, QVariant value);
// explicit construction from various types without going through
// QVariant boxing + unboxing. Add as needed if this proves useful
explicit QUniformValue(const QVector4D& foo);
void apply(QGraphicsContext* gc, int location, QString nm) const;
private:
void convertToBytes() const;
Type m_type;
int m_count;
unsigned int m_tupleSize;
QVariant m_var;
// value as data suitable for passing to glUniformfv/iv
mutable QByteArray m_bytes;
void fromVariant(QVariant v);
void fromVariantToInt(QVariant v);
void fromVariantToFloat(QVariant v);
void setRawFromFloats(const float *ptr, unsigned int count, unsigned int tupleSize);
void setRawFromInts(const qint32 *ptr, unsigned int count, unsigned int tupleSize);
};
class QUniformPack
{
public:
void setUniform(QString glslName, QUniformValue val);
void setTexture(QString glslName, RenderTexturePtr tex);
void apply(QGraphicsContext* gc);
private:
struct NamedUniform {
NamedUniform() : location(-1) { }
QString glslName;
int location;
QUniformValue uval;
};
QVector<NamedUniform> m_uniforms;
struct NamedTexture {
NamedTexture() : location(-1) {}
NamedTexture(QString nm, RenderTexturePtr t) :
glslName(nm),
location(-1),
tex(t)
{ }
QString glslName;
int location;
RenderTexturePtr tex;
};
QVector<NamedTexture> m_textures;
};
}} // of namespace Qt3D::Render
#endif // QUNIFORMVALUE_H
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