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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.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later 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 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QT3DRENDER_RENDER_QUNIFORMVALUE_H
#define QT3DRENDER_RENDER_QUNIFORMVALUE_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QVariant>
#include <QByteArray>
#include <QVector>
#include <QOpenGLShaderProgram>
#include <Qt3DCore/qnodeid.h>
#include <Qt3DRender/private/renderlogging_p.h>
#include <Qt3DRender/private/shadervariables_p.h>
QT_BEGIN_NAMESPACE
class QOpenGLShaderProgram;
namespace Qt3DCore {
class QFrameAllocator;
}
namespace Qt3DRender {
namespace Render {
class GraphicsContext;
/**
* @brief The QUniformValue class - immutable storage of uniform value
* in the rendering backend.
*/
class QUniformValue
{
public:
QUniformValue();
virtual ~QUniformValue() {}
static QUniformValue *fromVariant(const QVariant &v, Qt3DCore::QFrameAllocator *allocator);
virtual bool operator ==(const QUniformValue &other);
bool operator !=(const QUniformValue &other);
virtual bool isTexture() const
{
return false;
}
virtual void apply(GraphicsContext *ctx, const ShaderUniform &description) const;
protected:
QVariant m_var;
};
class TextureUniform : public QUniformValue
{
public :
TextureUniform()
: QUniformValue()
, m_textureUnit(-1)
{
}
bool isTexture() const Q_DECL_FINAL
{
return true;
}
void setTextureId(const Qt3DCore::QNodeId &id)
{
m_textureId = id;
}
Qt3DCore::QNodeId textureId() const { return m_textureId; }
bool operator ==(const QUniformValue &other) Q_DECL_OVERRIDE
{
if (other.isTexture()) {
const TextureUniform *otherTex = static_cast<const TextureUniform *>(&other);
return otherTex->textureId() == m_textureId;
}
return false;
}
// Called by the QGraphicContext prior applying
void setTextureUnit(int textureUnit) { m_textureUnit = textureUnit; }
void apply(GraphicsContext *ctx, const ShaderUniform &description) const Q_DECL_OVERRIDE;
private:
Qt3DCore::QNodeId m_textureId;
int m_textureUnit;
};
struct BlockToUBO {
int m_blockIndex;
Qt3DCore::QNodeId m_shaderDataID;
bool m_needsUpdate;
QHash<QString, QVariant> m_updatedProperties;
};
class QUniformPack
{
public:
~QUniformPack();
void setUniform(const QString &glslName, const QUniformValue *val);
void setTexture(const QString &glslName, const Qt3DCore::QNodeId &id);
void setUniformBuffer(const BlockToUBO &blockToUBO);
inline const QHash<QString, const QUniformValue* > &uniforms() const { return m_uniforms; }
const QUniformValue *uniform(const QString &glslName) const { return m_uniforms.value(glslName); }
struct NamedTexture
{
NamedTexture() {}
NamedTexture(const QString &nm, const Qt3DCore::QNodeId &t)
: glslName(nm)
, texId(t)
{ }
QString glslName;
Qt3DCore::QNodeId texId;
};
inline QVector<NamedTexture> textures() const { return m_textures; }
inline QVector<BlockToUBO> uniformBuffers() const { return m_uniformBuffers; }
private:
QHash<QString, const QUniformValue* > m_uniforms;
QVector<NamedTexture> m_textures;
QVector<BlockToUBO> m_uniformBuffers;
friend class RenderView;
};
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
#endif // QT3DRENDER_RENDER_QUNIFORMVALUE_H
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