ShaderTest2.cpp

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 Copyright (c) 2014-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#include "ShaderTest2.h"
#include "ShaderTest.h"
#include "../testResource.h"
#include "cocos2d.h"
#include <tuple>

USING_NS_CC;

Shader2Tests::Shader2Tests()
{
    ADD_TEST_CASE(EffectSpriteTest);
    ADD_TEST_CASE(EffectSpriteLamp);
}

//
// EffectSprite
//
static int tuple_sort( const std::tuple<ssize_t,Effect*,QuadCommand> &tuple1, const std::tuple<ssize_t,Effect*,QuadCommand> &tuple2 )
{
    return std::get<0>(tuple1) < std::get<0>(tuple2);
}

class Effect;
class EffectSprite : public Sprite
{
public:
    static EffectSprite *create(const std::string& filename) {
        auto ret = new (std::nothrow) EffectSprite;
        if(ret && ret->initWithFile(filename)) {
            ret->autorelease();
            return ret;
        }
        CC_SAFE_RELEASE(ret);
        return nullptr;
    }

    void setEffect(Effect* effect) {
        if(_defaultEffect != effect) {
            effect->setTarget(this);

            CC_SAFE_RELEASE(_defaultEffect);
            _defaultEffect = effect;
            CC_SAFE_RETAIN(_defaultEffect);

            setGLProgramState(_defaultEffect->getGLProgramState());
        }
    }
    void addEffect(Effect *effect, ssize_t order) {
        effect->retain();
        effect->setTarget(this);

        _effects.emplace_back(order,effect,QuadCommand());

        std::sort(std::begin(_effects), std::end(_effects), tuple_sort);
    }

    void draw(Renderer *renderer, const Mat4 &transform, uint32_t flags) override
    {
#if CC_USE_CULLING
        // Don't do calculate the culling if the transform was not updated
        _insideBounds = (flags & FLAGS_TRANSFORM_DIRTY) ? renderer->checkVisibility(transform, _contentSize) : _insideBounds;

        if(_insideBounds)
#endif
        {
            // negative effects: order < 0
            int idx=0;
            for(auto &effect : _effects) {

                if(std::get<0>(effect) >=0)
                    break;
                auto glProgramState = std::get<1>(effect)->getGLProgramState();
                if (glProgramState)
                {
                    QuadCommand &q = std::get<2>(effect);
                    q.init(_globalZOrder, _texture->getName(), glProgramState, _blendFunc, &_quad, 1, transform, flags);
                    renderer->addCommand(&q);
                }
                idx++;
            }

            // normal effect: order == 0
            _trianglesCommand.init(_globalZOrder, _texture->getName(), getGLProgramState(), _blendFunc, _polyInfo.triangles, transform, flags);
            renderer->addCommand(&_trianglesCommand);

            // positive effects: order >= 0
            for(auto it = std::begin(_effects)+idx; it != std::end(_effects); ++it) {
                QuadCommand &q = std::get<2>(*it);
                q.init(_globalZOrder, _texture->getName(), std::get<1>(*it)->getGLProgramState(), _blendFunc, &_quad, 1, transform, flags);
                renderer->addCommand(&q);
                idx++;
            }
        }
    }
protected:
    EffectSprite() : _defaultEffect(nullptr)
    {
        _effects.reserve(2);
    }
    ~EffectSprite() {
        for(auto &tuple : _effects) {
            std::get<1>(tuple)->release();
        }
        CC_SAFE_RELEASE(_defaultEffect);
    }

    std::vector<std::tuple<ssize_t,Effect*,QuadCommand>> _effects;
    Effect* _defaultEffect;
};

//
// Effect
//

bool Effect::initGLProgramState(const std::string &fragmentFilename)
{
    auto fileUtiles = FileUtils::getInstance();
    auto fragmentFullPath = fileUtiles->fullPathForFilename(fragmentFilename);
    auto fragSource = fileUtiles->getStringFromFile(fragmentFullPath);
    auto glprogram = GLProgram::createWithByteArrays(ccPositionTextureColor_noMVP_vert, fragSource.c_str());
    
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
    _fragSource = fragSource;
#endif
    
    _glprogramstate = (glprogram == nullptr ? nullptr : GLProgramState::getOrCreateWithGLProgram(glprogram));
    CC_SAFE_RETAIN(_glprogramstate);

    return _glprogramstate != nullptr;
}

Effect::Effect()
: _glprogramstate(nullptr)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
    _backgroundListener = EventListenerCustom::create(EVENT_RENDERER_RECREATED,
                                                      [this](EventCustom*)
                                                      {
                                                          auto glProgram = _glprogramstate->getGLProgram();
                                                          glProgram->reset();
                                                          glProgram->initWithByteArrays(ccPositionTextureColor_noMVP_vert, _fragSource.c_str());
                                                          glProgram->link();
                                                          glProgram->updateUniforms();
                                                      }
                                                      );
    Director::getInstance()->getEventDispatcher()->addEventListenerWithFixedPriority(_backgroundListener, -1);
#endif
}

Effect::~Effect()
{
    CC_SAFE_RELEASE_NULL(_glprogramstate);
#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
    Director::getInstance()->getEventDispatcher()->removeEventListener(_backgroundListener);
#endif
}

// Blur
class EffectBlur : public Effect
{
public:
    CREATE_FUNC(EffectBlur);
    virtual void setTarget(EffectSprite *sprite) override;
    void setBlurRadius(float radius);
    void setBlurSampleNum(float num);

protected:
    bool init(float blurRadius = 10.0f, float sampleNum = 5.0f);
    
    float _blurRadius;
    float _blurSampleNum;
};

void EffectBlur::setTarget(EffectSprite *sprite)
{
    if (_glprogramstate == nullptr)
        return;
    
    Size size = sprite->getTexture()->getContentSizeInPixels();
    _glprogramstate->setUniformVec2("resolution", size);
#if (CC_TARGET_PLATFORM != CC_PLATFORM_WINRT)
    _glprogramstate->setUniformFloat("blurRadius", _blurRadius);
    _glprogramstate->setUniformFloat("sampleNum", _blurSampleNum);
#endif
}

bool EffectBlur::init(float blurRadius, float sampleNum)
{
#if (CC_TARGET_PLATFORM != CC_PLATFORM_WINRT)
    initGLProgramState("Shaders/example_Blur.fsh");
#else
    initGLProgramState("Shaders/example_Blur_winrt.fsh");
#endif
    _blurRadius = blurRadius;
    _blurSampleNum = sampleNum;
    
    return true;
}

void EffectBlur::setBlurRadius(float radius)
{
    _blurRadius = radius;
}

void EffectBlur::setBlurSampleNum(float num)
{
    _blurSampleNum = num;
}

// Outline
class EffectOutline : public Effect
{
public:
    CREATE_FUNC(EffectOutline);

    bool init()
    {
        initGLProgramState("Shaders/example_Outline.fsh");

        Vec3 color(1.0f, 0.2f, 0.3f);
        GLfloat radius = 0.01f;
        GLfloat threshold = 1.75;

        _glprogramstate->setUniformVec3("u_outlineColor", color);
        _glprogramstate->setUniformFloat("u_radius", radius);
        _glprogramstate->setUniformFloat("u_threshold", threshold);
        return true;
    }
};

// Noise
class EffectNoise : public Effect
{
public:
    CREATE_FUNC(EffectNoise);

protected:
    bool init() {
        initGLProgramState("Shaders/example_Noisy.fsh");
        return true;
    }

    virtual void setTarget(EffectSprite* sprite) override
    {
        auto s = sprite->getTexture()->getContentSizeInPixels();
        getGLProgramState()->setUniformVec2("resolution", Vec2(s.width, s.height));
    }
};

// Edge Detect
class EffectEdgeDetect : public Effect
{
public:
    CREATE_FUNC(EffectEdgeDetect);

protected:
    bool init() {
        initGLProgramState("Shaders/example_EdgeDetection.fsh");
        return true;
    }

    virtual void setTarget(EffectSprite* sprite) override
    {
        auto s = sprite->getTexture()->getContentSizeInPixels();
        getGLProgramState()->setUniformVec2("resolution", Vec2(s.width, s.height));
    }
};

// Grey
class EffectGreyScale : public Effect
{
public:
    CREATE_FUNC(EffectGreyScale);

protected:
    bool init() {
        initGLProgramState("Shaders/example_GreyScale.fsh");
        return true;
    }
};

// Sepia
class EffectSepia : public Effect
{
public:
    CREATE_FUNC(EffectSepia);

protected:
    bool init() {
        initGLProgramState("Shaders/example_Sepia.fsh");
        return true;
    }
};

// bloom
class EffectBloom : public Effect
{
public:
    CREATE_FUNC(EffectBloom);

protected:
    bool init() {
        initGLProgramState("Shaders/example_Bloom.fsh");
        return true;
    }

    virtual void setTarget(EffectSprite* sprite) override
    {
        auto s = sprite->getTexture()->getContentSizeInPixels();
        getGLProgramState()->setUniformVec2("resolution", Vec2(s.width, s.height));
    }
};

// cel shading
class EffectCelShading : public Effect
{
public:
    CREATE_FUNC(EffectCelShading);

protected:
    bool init() {
        initGLProgramState("Shaders/example_CelShading.fsh");
        return true;
    }

    virtual void setTarget(EffectSprite* sprite) override
    {
        auto s = sprite->getTexture()->getContentSizeInPixels();
        getGLProgramState()->setUniformVec2("resolution", Vec2(s.width, s.height));
    }
};

// Lens Flare
class EffectLensFlare : public Effect
{
public:
    CREATE_FUNC(EffectLensFlare);

protected:
    bool init() {
        initGLProgramState("Shaders/example_LensFlare.fsh");
        return true;
    }

    virtual void setTarget(EffectSprite* sprite) override
    {
        auto s = sprite->getTexture()->getContentSizeInPixels();
        getGLProgramState()->setUniformVec2("textureResolution", Vec2(s.width, s.height));

        s = Director::getInstance()->getWinSize();
        getGLProgramState()->setUniformVec2("resolution", Vec2(s.width, s.height));

    }
};

class EffectNormalMapped : public Effect
{
public:
    CREATE_FUNC(EffectNormalMapped);
    static EffectNormalMapped* create(const std::string&normalMapFileName)
    {
        EffectNormalMapped *normalMappedSprite = new (std::nothrow) EffectNormalMapped();
        if (normalMappedSprite && normalMappedSprite->init() && normalMappedSprite->initNormalMap(normalMapFileName))
        {
            
            normalMappedSprite->autorelease();
            return normalMappedSprite;
        }
        CC_SAFE_DELETE(normalMappedSprite);
        return nullptr;
    }
    void setKBump(float value);
    void setLightPos(const Vec3& pos);
    void setLightColor(const Color4F& color);
    float getKBump()const{return _kBump;}
protected:
    bool init();
    bool initNormalMap(const std::string&normalMapFileName);
    virtual void setTarget(EffectSprite* sprite) override;
    EffectSprite* _sprite;
    Vec3 _lightPos;
    Color4F _lightColor;
    float  _kBump;
};

bool EffectNormalMapped::init()
{
    initGLProgramState("Shaders3D/Normal.frag");
    _kBump = 2;
    return true;
}
bool EffectNormalMapped::initNormalMap(const std::string& normalMapFileName)
{
    auto normalMapTexture = Director::getInstance()->getTextureCache()->addImage(normalMapFileName);
    getGLProgramState()->setUniformTexture("u_normalMap", normalMapTexture);
    return true;
}
void EffectNormalMapped::setTarget(EffectSprite* sprite)
{
    _sprite = sprite;
    getGLProgramState()->setUniformFloat("u_kBump", _kBump);
    getGLProgramState()->setUniformVec2("u_contentSize", Vec2(sprite->getContentSize().width,sprite->getContentSize().height));
}

void EffectNormalMapped::setKBump(float value)
{
    _kBump = value;
    auto glProgramState = getGLProgramState();
    if(glProgramState) glProgramState->setUniformFloat("u_kBump", _kBump);
}

void EffectNormalMapped::setLightPos(const Vec3& pos)
{
    _lightPos = pos;
    auto glProgramState = getGLProgramState();
    if(glProgramState) glProgramState->setUniformVec4("u_lightPosInLocalSpace", Vec4(_lightPos.x,_lightPos.y,_lightPos.z,1));
    
}

void EffectNormalMapped::setLightColor(const Color4F& color)
{
    _lightColor = color;
    auto glProgramState = getGLProgramState();
    if(glProgramState) getGLProgramState()->setUniformVec3("u_diffuseL", Vec3(_lightColor.r,_lightColor.g,_lightColor.b));
    
}

EffectSpriteTest::EffectSpriteTest()
{
}

bool EffectSpriteTest::init()
{
    if (ShaderTestDemo2::init()) {

        auto layer = LayerColor::create(Color4B::BLUE);
        this->addChild(layer);

        auto s = Director::getInstance()->getWinSize();

        auto itemPrev = MenuItemImage::create("Images/b1.png", "Images/b2.png",
                                          [&](Ref *sender) {
                                              _vectorIndex--;
                                              if(_vectorIndex<0)
                                                  _vectorIndex = _effects.size()-1;
                                              _sprite->setEffect(_effects.at(_vectorIndex));
                                          });

        auto itemNext = MenuItemImage::create("Images/f1.png", "Images/f2.png",
                                          [&](Ref *sender) {
                                              _vectorIndex++;
                                              if(_vectorIndex>=_effects.size())
                                                  _vectorIndex = 0;
                                              _sprite->setEffect(_effects.at(_vectorIndex));
                                          });

        auto menu = Menu::create(itemPrev, itemNext, nullptr);
        menu->alignItemsHorizontally();
        menu->setScale(0.5);
        menu->setAnchorPoint(Vec2(0,0));
        menu->setPosition(Vec2(s.width/2,70));
        addChild(menu);

        _sprite = EffectSprite::create("Images/grossini.png");
        _sprite->setPosition(Vec2(0, s.height/2));
        addChild(_sprite);

        auto jump = JumpBy::create(4, Vec2(s.width,0), 100, 4);
        auto rot = RotateBy::create(4, 720);
        auto spawn = Spawn::create(jump, rot, nullptr);
        auto rev = spawn->reverse();
        auto seq = Sequence::create(spawn, rev, nullptr);
        auto repeat = RepeatForever::create(seq);
        _sprite->runAction(repeat);

        // set the Effects
        _effects.pushBack(EffectBlur::create());
        _effects.pushBack(EffectOutline::create());
        _effects.pushBack(EffectNoise::create());
        _effects.pushBack(EffectEdgeDetect::create());
        _effects.pushBack(EffectGreyScale::create());
        _effects.pushBack(EffectSepia::create());
        _effects.pushBack(EffectBloom::create());
        _effects.pushBack(EffectCelShading::create());
        _effects.pushBack(EffectLensFlare::create());

        _vectorIndex = 0;
        _sprite->setEffect( _effects.at(_vectorIndex) );

//        _sprite->addEffect( _effects.at(8), -10 );
//        _sprite->addEffect( _effects.at(1), 1 );
        
        return true;
    }
    return false;
}

EffectSpriteLamp::EffectSpriteLamp()
{
}

bool EffectSpriteLamp::init()
{
    if (ShaderTestDemo2::init()) {
        
        auto s = Director::getInstance()->getWinSize();
        _sprite = EffectSprite::create("Images/elephant1_Diffuse.png");
        //auto contentSize = _sprite->getContentSize();
        _sprite->setPosition(Vec2(s.width/2, s.height/2));
        addChild(_sprite);
        
        auto lampEffect = EffectNormalMapped::create("Images/elephant1_Normal.png");
        
        Vec3 pos(150,150, 50);
        _lightSprite = Sprite::create("Images/ball.png");
        this->addChild(_lightSprite);
        _lightSprite->setPosition(Vec2(pos.x, s.height- pos.y));
        Mat4 mat = _sprite->getNodeToWorldTransform();
        Point lightPosInLocalSpace = PointApplyAffineTransform(Vec2(pos.x, pos.y), _sprite->getWorldToNodeAffineTransform());
        lampEffect->setLightColor(Color4F(1,1,1,1));
        lampEffect->setLightPos(Vec3(lightPosInLocalSpace.x, lightPosInLocalSpace.y, 50));
        lampEffect->setKBump(2);
        _sprite->setEffect(lampEffect);
        _effect = lampEffect;
        auto listener = EventListenerTouchAllAtOnce::create();
        listener->onTouchesBegan = CC_CALLBACK_2(EffectSpriteLamp::onTouchesBegan, this);
        listener->onTouchesMoved = CC_CALLBACK_2(EffectSpriteLamp::onTouchesMoved, this);
        listener->onTouchesEnded = CC_CALLBACK_2(EffectSpriteLamp::onTouchesEnded, this);
        _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
        return true;
    }
    return false;
}


void EffectSpriteLamp::onTouchesBegan(const std::vector<Touch*>& touches, Event *unused_event)
{
    for ( auto &item: touches )
    {
        auto touch = item;
        auto s = Director::getInstance()->getWinSize();
        Point loc_winSpace = touch->getLocationInView();
        _lightSprite->setPosition(Vec2( loc_winSpace.x,  s.height - loc_winSpace.y));
        Vec3 pos(loc_winSpace.x,loc_winSpace.y, 50);
        Mat4 mat = _sprite->getNodeToWorldTransform();
        Point lightPosInLocalSpace = PointApplyAffineTransform(Vec2(pos.x, pos.y), _sprite->getWorldToNodeAffineTransform());
        ((EffectNormalMapped*)_effect)->setLightPos(Vec3(lightPosInLocalSpace.x, lightPosInLocalSpace.y, 50));
    }
}

void EffectSpriteLamp::onTouchesMoved(const std::vector<Touch*>& touches, Event *unused_event)
{
    for ( auto &item: touches )
    {
        auto touch = item;
        auto s = Director::getInstance()->getWinSize();
        Point loc_winSpace = touch->getLocationInView();
        _lightSprite->setPosition(Vec2( loc_winSpace.x, s.height - loc_winSpace.y));
        Vec3 pos(loc_winSpace.x,loc_winSpace.y, 50);
        Mat4 mat = _sprite->getNodeToWorldTransform();
        Point lightPosInLocalSpace = PointApplyAffineTransform(Vec2(pos.x, pos.y), _sprite->getWorldToNodeAffineTransform());
        ((EffectNormalMapped*)_effect)->setLightPos(Vec3(lightPosInLocalSpace.x, lightPosInLocalSpace.y, 50));
    }
}

void EffectSpriteLamp::onTouchesEnded(const std::vector<Touch*>& touches, Event *unused_event)
{
    for ( auto &item: touches )
    {
        auto touch = item;
        auto s = Director::getInstance()->getWinSize();
        Point loc_winSpace = touch->getLocationInView();
        _lightSprite->setPosition(Vec2( loc_winSpace.x, s.height - loc_winSpace.y));
        Vec3 pos(loc_winSpace.x,loc_winSpace.y, 50);
        Mat4 mat = _sprite->getNodeToWorldTransform();
        Point lightPosInLocalSpace = PointApplyAffineTransform(Vec2(pos.x, pos.y), _sprite->getWorldToNodeAffineTransform());
        ((EffectNormalMapped*)_effect)->setLightPos(Vec3(lightPosInLocalSpace.x, lightPosInLocalSpace.y, 50));
    }
}