cocos_lib/cocos/scene/Fog.cpp

/****************************************************************************
 Copyright (c) 2021-2023 Xiamen Yaji Software Co., Ltd.
 
 http://www.cocos.com
 
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 of this software and associated documentation files (the "Software"), to deal
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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include "scene/Fog.h"
#include "core/Root.h"
#include "renderer/pipeline/custom/RenderInterfaceTypes.h"
#include "renderer/pipeline/helper/Utils.h"

namespace cc {
namespace scene {

void FogInfo::setEnabled(bool val) const {
    if (_isEnabled == val) {
        return;
    }

    if (_resource != nullptr) {
        _resource->setEnabled(val);
        if (val) {
            _resource->setType(_type);
        }
    }
}

void FogInfo::setFogColor(const Color &val) {
    _fogColor.set(val);
    if (_resource != nullptr) {
        _resource->setFogColor(_fogColor);
    }
}

void FogInfo::setType(FogType val) {
    _type = val;
    if (_resource != nullptr) {
        _resource->setType(_type);
    }
}

void FogInfo::setFogDensity(float val) {
    _fogDensity = val;
    if (_resource) {
        _resource->setFogDensity(_fogDensity);
    }
}

void FogInfo::setFogStart(float val) {
    _fogStart = val;
    if (_resource != nullptr) {
        _resource->setFogStart(_fogStart);
    }
}

void FogInfo::setFogEnd(float val) {
    _fogEnd = val;
    if (_resource != nullptr) {
        _resource->setFogEnd(_fogEnd);
    }
}

void FogInfo::setFogAtten(float val) {
    _fogAtten = val;
    if (_resource != nullptr) {
        _resource->setFogAtten(_fogAtten);
    }
}

void FogInfo::setFogTop(float val) {
    _fogTop = val;
    if (_resource != nullptr) {
        _resource->setFogTop(_fogTop);
    }
}

void FogInfo::setFogRange(float val) {
    _fogRange = val;
    if (_resource != nullptr) {
        _resource->setFogRange(_fogRange);
    }
}

void FogInfo::activate(Fog *resource) {
    _resource = resource;
    _resource->initialize(*this);
    _resource->activate();
}

//
void Fog::initialize(const FogInfo &fogInfo) {
    _activated = false;
    setFogColor(fogInfo.getFogColor());
    _enabled = fogInfo.isEnabled();
    _accurate = fogInfo.isAccurate();
    _type = _enabled ? fogInfo.getType() : FogType::NONE;
    _fogDensity = fogInfo.getFogDensity();
    _fogStart = fogInfo.getFogStart();
    _fogEnd = fogInfo.getFogEnd();
    _fogAtten = fogInfo.getFogAtten();
    _fogTop = fogInfo.getFogTop();
    _fogRange = fogInfo.getFogRange();
}

void Fog::updatePipeline() {
    auto *root = Root::getInstance();
    const FogType value = _enabled ? _type : FogType::NONE;
    const int32_t accurateValue = isAccurate() ? 1 : 0;
    auto *pipeline = root->getPipeline();
    auto iterMacroFog = pipeline->getMacros().find("CC_USE_FOG");
    auto iterMacroAccurateFog = pipeline->getMacros().find("CC_USE_ACCURATE_FOG");
    if (iterMacroFog != pipeline->getMacros().end() && iterMacroAccurateFog != pipeline->getMacros().end()) {
        const MacroValue &macroFog = iterMacroFog->second;
        const MacroValue &macroAccurateFog = iterMacroAccurateFog->second;
        const int32_t *macroFogPtr = ccstd::get_if<int32_t>(&macroFog);
        const int32_t *macroAccurateFogPtr = ccstd::get_if<int32_t>(&macroAccurateFog);
        if (macroFogPtr != nullptr && *macroFogPtr == static_cast<int32_t>(value) && macroAccurateFogPtr != nullptr && *macroAccurateFogPtr == accurateValue) return;
    }

    pipeline->setValue("CC_USE_FOG", static_cast<int32_t>(value));
    pipeline->setValue("CC_USE_ACCURATE_FOG", accurateValue);
    if (_activated) {
        root->onGlobalPipelineStateChanged();
    }
}

void Fog::setFogColor(const Color &val) {
    _fogColor.set(val);
    Vec4 v4(static_cast<float>(val.r) / 255.F, static_cast<float>(val.g) / 255.F, static_cast<float>(val.b) / 255.F, static_cast<float>(val.a) / 255.F);
    pipeline::srgbToLinear(&_colorArray, v4);
}

} // namespace scene
} // namespace cc