rendercommand_p.h - mozsearch

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// Copyright (C) 2020 Klaralvdalens Datakonsult AB (KDAB).

// Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QT3DRENDER_RENDER_RHI_RENDERCOMMAND_H

#define QT3DRENDER_RENDER_RHI_RENDERCOMMAND_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 <qglobal.h>

#include <shaderparameterpack_p.h>

#include <rhihandle_types_p.h>

#include <Qt3DCore/private/vector_helper_p.h>

#include <Qt3DRender/private/renderviewjobutils_p.h>

#include <Qt3DRender/private/handle_types_p.h>

#include <Qt3DRender/qgeometryrenderer.h>

#include <QOpenGLShaderProgram>

#include <QOpenGLTexture>

#include <QMatrix4x4>

#include <rhi/qrhi.h>

#include <Qt3DCore/qattribute.h>

#include <variant>

QT_BEGIN_NAMESPACE

class QRhiGraphicsPipeline;

class QRhiShaderResourceBindings;

namespace Qt3DRender {

namespace Render {

class RenderStateSet;

using RenderStateSetPtr = QSharedPointer<RenderStateSet>;

namespace Rhi {

class RHIShader;

class RHIGraphicsPipeline;

class RHIComputePipeline;

struct CommandUBO

    float modelMatrix[16];

    float inverseModelMatrix[16];

    float modelViewMatrix[16];

    float modelNormalMatrix[12];

    float inverseModelViewMatrix[16];

    float mvp[16];

    float inverseModelViewProjectionMatrix[16];

    float modelViewNormalMatrix[12];

    float skinningPalette[100 * 16];

};

static_assert(sizeof(CommandUBO) == 6 * (16 * sizeof(float)) + 2 * (12 * sizeof(float)) + 100 * (16 * sizeof(float)),

              "UBO doesn't match std140");

struct Q_AUTOTEST_EXPORT AttributeInfo

    int nameId = -1;

    QRhiVertexInputBinding::Classification classification = QRhiVertexInputBinding::PerVertex;

    size_t stride = 0;

    size_t offset = 0;

    size_t divisor = 0;

};

Q_AUTOTEST_EXPORT bool operator==(const AttributeInfo &a, const AttributeInfo &b);

Q_AUTOTEST_EXPORT bool operator!=(const AttributeInfo &a, const AttributeInfo &b);

class Q_AUTOTEST_EXPORT RenderCommand

public:

    RenderCommand();

    ~RenderCommand();

    bool isValid() const noexcept;

    HMaterial m_material; // Purely used to ease sorting (minimize stage changes, binding changes

                          // ....)

    RHIShader *m_rhiShader; // Shader to be used at render time

    Qt3DCore::QNodeId m_shaderId; // Shader for given pass and mesh

    ShaderParameterPack m_parameterPack; // Might need to be reworked so as to be able to destroy

                                         // the Texture while submission is happening.

    RenderStateSetPtr m_stateSet;

    HGeometry m_geometry;

    HGeometryRenderer m_geometryRenderer;

    HBuffer m_indirectDrawBuffer; // Reference to indirect draw buffer (valid only m_drawIndirect ==

                                  // true)

    HComputeCommand m_computeCommand;

    // A QAttribute pack might be interesting

    // This is a temporary fix in the meantime, to remove the hacked methods in Technique

    std::vector<int> m_activeAttributes;

    float m_depth;

    int m_changeCost;

    enum CommandType { Draw, Compute };

    CommandType m_type;

    int m_workGroups[3];

    // Values filled for draw calls by Renderer (in prepare Submission)

    GLsizei m_primitiveCount;

    QGeometryRenderer::PrimitiveType m_primitiveType;

    int m_restartIndexValue;

    int m_firstInstance;

    int m_firstVertex;

    int m_verticesPerPatch;

    int m_instanceCount;

    int m_indexOffset;

    uint m_indexAttributeByteOffset;

    Qt3DCore::QAttribute::VertexBaseType m_indexAttributeDataType;

    uint m_indirectAttributeByteOffset;

    bool m_drawIndexed;

    bool m_drawIndirect;

    bool m_primitiveRestartEnabled;

    bool m_isValid;

    std::vector<AttributeInfo> m_attributeInfo;

    QVarLengthArray<QRhiCommandBuffer::VertexInput, 8> vertex_input;

    const Attribute *indexAttribute {};

    QRhiBuffer *indexBuffer {};

    CommandUBO m_commandUBO;

    QRhiShaderResourceBindings *shaderResourceBindings = nullptr;

    std::vector<QRhiShaderResourceBinding> resourcesBindings;

    struct Pipeline : std::variant<std::monostate, RHIGraphicsPipeline *, RHIComputePipeline*>

        using variant::variant;

        bool isValid() const noexcept;

        RHIGraphicsPipeline* graphics() const noexcept

            auto ptr = std::get_if<RHIGraphicsPipeline*>(this);

            return ptr ? *ptr : nullptr;

        RHIComputePipeline* compute() const noexcept

            auto ptr = std::get_if<RHIComputePipeline*>(this);

            return ptr ? *ptr : nullptr;

        template<typename F>

        auto visit(F&& f) const

            return std::visit(f, (const variant&) *this);

};

    Pipeline pipeline {};

};

Q_AUTOTEST_EXPORT bool operator==(const RenderCommand &a, const RenderCommand &b) noexcept;

inline bool operator!=(const RenderCommand &lhs, const RenderCommand &rhs) noexcept

    return !operator==(lhs, rhs);

} // namespace Rhi

} // namespace Render

} // namespace Qt3DRender

QT_END_NAMESPACE

#endif // QT3DRENDER_RENDER_RHI_RENDERCOMMAND_H