trianglerenderer.h 3.69 KB
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/****************************************************************************
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**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
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#ifndef TRIANGLERENDERER_H
#define TRIANGLERENDERER_H

#include <QRhi>

class TriangleRenderer
{
public:
    void setRhi(QRhi *r) { m_r = r; }
    void setSampleCount(int samples) { m_sampleCount = samples; }
    int sampleCount() const { return m_sampleCount; }
    void setTranslation(const QVector3D &v) { m_translation = v; }
    void setScale(float f) { m_scale = f; }
    void setDepthWrite(bool enable) { m_depthWrite = enable; }
    void setColorAttCount(int count) { m_colorAttCount = count; }
    QRhiGraphicsPipeline *pipeline() const { return m_ps; }
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    void initResources(QRhiRenderPassDescriptor *rp);
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    void releaseResources();
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    void resize(const QSize &pixelSize);
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    void queueResourceUpdates(QRhiResourceUpdateBatch *resourceUpdates);
    void queueDraw(QRhiCommandBuffer *cb, const QSize &outputSizeInPixels);

private:
    QRhi *m_r;

    QRhiBuffer *m_vbuf = nullptr;
    bool m_vbufReady = false;
    QRhiBuffer *m_ubuf = nullptr;
    QRhiShaderResourceBindings *m_srb = nullptr;
    QRhiGraphicsPipeline *m_ps = nullptr;

    QVector3D m_translation;
    float m_scale = 1;
    bool m_depthWrite = false;
    int m_colorAttCount = 1;
    QMatrix4x4 m_proj;
    float m_rotation = 0;
    float m_opacity = 1;
    int m_opacityDir = -1;
    int m_sampleCount = 1; // no MSAA by default
};

#endif