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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_QSHADERPROGRAM_H
#define QT3DRENDER_QSHADERPROGRAM_H

#include <Qt3DCore/qnode.h>
#include <Qt3DRender/qt3drender_global.h>

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

class QShaderProgramPrivate;

class QT3DRENDERSHARED_EXPORT QShaderProgram : public Qt3DCore::QNode
{
    Q_OBJECT
    Q_PROPERTY(QByteArray vertexShaderCode READ vertexShaderCode WRITE setVertexShaderCode NOTIFY vertexShaderCodeChanged)
    Q_PROPERTY(QByteArray tessellationControlShaderCode READ tessellationControlShaderCode WRITE setTessellationControlShaderCode NOTIFY tessellationControlShaderCodeChanged)
    Q_PROPERTY(QByteArray tessellationEvaluationShaderCode READ tessellationEvaluationShaderCode WRITE setTessellationEvaluationShaderCode NOTIFY tessellationEvaluationShaderCodeChanged)
    Q_PROPERTY(QByteArray geometryShaderCode READ geometryShaderCode WRITE setGeometryShaderCode NOTIFY geometryShaderCodeChanged)
    Q_PROPERTY(QByteArray fragmentShaderCode READ fragmentShaderCode WRITE setFragmentShaderCode NOTIFY fragmentShaderCodeChanged)
    Q_PROPERTY(QByteArray computeShaderCode READ computeShaderCode WRITE setComputeShaderCode NOTIFY computeShaderCodeChanged)

public:
    explicit QShaderProgram(Qt3DCore::QNode *parent = 0);
    ~QShaderProgram();

    enum ShaderType {
        Vertex = 0,
        Fragment,
        TessellationControl,
        TessellationEvaluation,
        Geometry,
        Compute
    };
    Q_ENUM(ShaderType)

    // Source code in-line
    void setVertexShaderCode(const QByteArray &vertexShaderCode);
    QByteArray vertexShaderCode() const;

    void setTessellationControlShaderCode(const QByteArray &tessellationControlShaderCode);
    QByteArray tessellationControlShaderCode() const;

    void setTessellationEvaluationShaderCode(const QByteArray &tessellationEvaluationShaderCode);
    QByteArray tessellationEvaluationShaderCode() const;

    void setGeometryShaderCode(const QByteArray &geometryShaderCode);
    QByteArray geometryShaderCode() const;

    void setFragmentShaderCode(const QByteArray &fragmentShaderCode);
    QByteArray fragmentShaderCode() const;

    void setComputeShaderCode(const QByteArray &computeShaderCode);
    QByteArray computeShaderCode() const;

    void setShaderCode(ShaderType type, const QByteArray &shaderCode);
    QByteArray shaderCode(ShaderType type) const;

    Q_INVOKABLE static QByteArray loadSource(const QUrl &sourceUrl);

Q_SIGNALS:
    void vertexShaderCodeChanged();
    void tessellationControlShaderCodeChanged();
    void tessellationEvaluationShaderCodeChanged();
    void geometryShaderCodeChanged();
    void fragmentShaderCodeChanged();
    void computeShaderCodeChanged();

protected:
    QShaderProgram(QShaderProgramPrivate &dd, Qt3DCore::QNode *parent = 0);
    void copy(const Qt3DCore::QNode *ref) Q_DECL_OVERRIDE;

private:
    Q_DECLARE_PRIVATE(QShaderProgram)
    QT3D_CLONEABLE(QShaderProgram)
};

}

QT_END_NAMESPACE

#endif // QT3DRENDER_QSHADERPROGRAM_H