cocos_lib/cocos/2d/renderer/RenderDrawInfo.cpp

/****************************************************************************
 Copyright (c) 2019-2023 Xiamen Yaji Software Co., Ltd.

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 of this software and associated documentation files (the "Software"), to deal
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#include "2d/renderer/RenderDrawInfo.h"
#include "2d/renderer/Batcher2d.h"
#include "base/TypeDef.h"
#include "core/Root.h"
#include "renderer/gfx-base/GFXDevice.h"

namespace cc {

static gfx::DescriptorSetInfo gDsInfo;
static float matrixData[pipeline::UBOLocal::COUNT] = {0.F};
void mat4ToFloatArray(const cc::Mat4& mat, float* out, index_t ofs = 0) {
    memcpy(out + ofs, mat.m, 16 * sizeof(float));
}

RenderDrawInfo::RenderDrawInfo() {
    _attrSharedBufferActor.initialize(&_drawInfoAttrs, sizeof(_drawInfoAttrs));
}

RenderDrawInfo::~RenderDrawInfo() {
    destroy();
}

void RenderDrawInfo::changeMeshBuffer() {
    CC_ASSERT(Root::getInstance()->getBatcher2D());
    _meshBuffer = Root::getInstance()->getBatcher2D()->getMeshBuffer(_drawInfoAttrs._accId, _drawInfoAttrs._bufferId);
}

gfx::InputAssembler* RenderDrawInfo::requestIA(gfx::Device* device) {
    CC_ASSERT(_drawInfoAttrs._isMeshBuffer && _drawInfoAttrs._drawInfoType == RenderDrawInfoType::COMP);
    return initIAInfo(device);
}

void RenderDrawInfo::uploadBuffers() {
    CC_ASSERT(_drawInfoAttrs._isMeshBuffer && _drawInfoAttrs._drawInfoType == RenderDrawInfoType::COMP);
    if (_drawInfoAttrs._vbCount == 0 || _drawInfoAttrs._ibCount == 0) return;
    uint32_t size = _drawInfoAttrs._vbCount * 9 * sizeof(float); // magic Number
    gfx::Buffer* vBuffer = _ia->getVertexBuffers()[0];
    vBuffer->resize(size);
    vBuffer->update(_vDataBuffer);
    gfx::Buffer* iBuffer = _ia->getIndexBuffer();
    uint32_t iSize = _drawInfoAttrs._ibCount * 2;
    iBuffer->resize(iSize);
    iBuffer->update(_iDataBuffer);
}

void RenderDrawInfo::resetMeshIA() { // NOLINT(readability-make-member-function-const)
    CC_ASSERT(_drawInfoAttrs._isMeshBuffer && _drawInfoAttrs._drawInfoType == RenderDrawInfoType::COMP);
}

void RenderDrawInfo::destroy() {
    _vb = nullptr;
    _ib = nullptr;
    _ia = nullptr;
    if (_localDSBF) {
        CC_SAFE_DELETE(_localDSBF->ds);
        CC_SAFE_DELETE(_localDSBF->uboBuf);
        CC_SAFE_DELETE(_localDSBF);
    }
}

gfx::InputAssembler* RenderDrawInfo::initIAInfo(gfx::Device* device) {
    if (!_ia) {
        gfx::InputAssemblerInfo iaInfo = {};
        uint32_t vbStride = 9 * sizeof(float); // magic Number
        uint32_t ibStride = sizeof(uint16_t);
        _vb = device->createBuffer({
            gfx::BufferUsageBit::VERTEX | gfx::BufferUsageBit::TRANSFER_DST,
            gfx::MemoryUsageBit::DEVICE | gfx::MemoryUsageBit::HOST,
            vbStride * 3,
            vbStride,
        });
        _ib = device->createBuffer({
            gfx::BufferUsageBit::INDEX | gfx::BufferUsageBit::TRANSFER_DST,
            gfx::MemoryUsageBit::DEVICE | gfx::MemoryUsageBit::HOST,
            ibStride * 3,
            ibStride,
        });

        iaInfo.attributes = *(Root::getInstance()->getBatcher2D()->getDefaultAttribute());
        iaInfo.vertexBuffers.emplace_back(_vb);
        iaInfo.indexBuffer = _ib;

        _ia = device->createInputAssembler(iaInfo);
    }
    return _ia;
}

void RenderDrawInfo::updateLocalDescriptorSet(Node* transform, const gfx::DescriptorSetLayout* dsLayout) {
    if (_localDSBF == nullptr) {
        _localDSBF = new LocalDSBF();
        auto* device = Root::getInstance()->getDevice();
        gDsInfo.layout = dsLayout;
        _localDSBF->ds = device->createDescriptorSet(gDsInfo);
        _localDSBF->uboBuf = device->createBuffer({
            gfx::BufferUsageBit::UNIFORM | gfx::BufferUsageBit::TRANSFER_DST,
            gfx::MemoryUsageBit::HOST | gfx::MemoryUsageBit::DEVICE,
            pipeline::UBOLocal::SIZE,
            pipeline::UBOLocal::SIZE,
        });
    }
    if (_texture != nullptr && _sampler != nullptr) {
        _localDSBF->ds->bindTexture(static_cast<uint32_t>(pipeline::ModelLocalBindings::SAMPLER_SPRITE), _texture);
        _localDSBF->ds->bindSampler(static_cast<uint32_t>(pipeline::ModelLocalBindings::SAMPLER_SPRITE), _sampler);
    }
    _localDSBF->ds->bindBuffer(pipeline::UBOLocal::BINDING, _localDSBF->uboBuf);
    _localDSBF->ds->update();
    const auto& worldMatrix = transform->getWorldMatrix();
    mat4ToFloatArray(worldMatrix, matrixData, pipeline::UBOLocal::MAT_WORLD_OFFSET);
    _localDSBF->uboBuf->update(matrixData);
}

} // namespace cc