ClippingNodeTest.cpp

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/****************************************************************************
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
 
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//
// ClippingNodeTest
// 
//
// by Pierre-David Bélanger
//
 
#include "ClippingNodeTest.h"
#include "../testResource.h"
#include "renderer/CCRenderer.h"
#include "renderer/backend/ProgramState.h"
#include "renderer/ccShaders.h"
 
USING_NS_CC;
 
enum {
    kTagTitleLabel = 1,
    kTagSubtitleLabel = 2,
    kTagStencilNode = 100,
    kTagClipperNode = 101,
    kTagContentNode = 102,
};
 
ClippingNodeTests::ClippingNodeTests()
{
    ADD_TEST_CASE(ScrollViewDemo);
    ADD_TEST_CASE(HoleDemo);
    ADD_TEST_CASE(ShapeTest);
    ADD_TEST_CASE(ShapeInvertedTest);
    ADD_TEST_CASE(SpriteTest);
    ADD_TEST_CASE(SpriteNoAlphaTest);
    ADD_TEST_CASE(SpriteInvertedTest);
    ADD_TEST_CASE(NestedTest);
    ADD_TEST_CASE(RawStencilBufferTest);
    ADD_TEST_CASE(RawStencilBufferTest2);
    ADD_TEST_CASE(RawStencilBufferTest3);
    ADD_TEST_CASE(RawStencilBufferTest4);
    ADD_TEST_CASE(RawStencilBufferTest5);
    ADD_TEST_CASE(RawStencilBufferTest6);
    ADD_TEST_CASE(ClippingToRenderTextureTest);
    ADD_TEST_CASE(ClippingRectangleNodeTest);
}
 
 
//@implementation BaseClippingNodeTest
 
bool BaseClippingNodeTest::init()
{
    if (TestCase::init()) {
        
        auto background = Sprite::create(s_back3);
        background->setAnchorPoint( Vec2::ZERO );
        background->setPosition( Vec2::ZERO );
        this->addChild(background, -1);
 
        this->setup();
        return true;
    }
    return false;
}
 
BaseClippingNodeTest::~BaseClippingNodeTest()
{
    Director::getInstance()->getTextureCache()->removeUnusedTextures();
}
 
std::string BaseClippingNodeTest::title() const
{
    return "Clipping Demo";
}
 
void BaseClippingNodeTest::setup()
{
 
}
 
 
// BasicTest
 
std::string BasicTest::title() const
{
    return "Basic Test";
}
 
std::string BasicTest::subtitle() const
{
    return "";
}
 
void BasicTest::setup()
{
    auto s = Director::getInstance()->getWinSize();
    
    auto stencil = this->stencil();
    stencil->setTag( kTagStencilNode );
    stencil->setPosition(50, 50);
    
    auto clipper = this->clipper();
    clipper->setTag( kTagClipperNode );
    clipper->setAnchorPoint(Vec2(0.5f, 0.5f));
    clipper->setPosition(s.width / 2 - 50, s.height / 2 - 50);
    clipper->setStencil(stencil);
    this->addChild(clipper);
    
    auto content = this->content();
    content->setPosition(50, 50);
    clipper->addChild(content);
}
 
Action* BasicTest::actionRotate()
{
    return RepeatForever::create(RotateBy::create(1.0f, 90.0f));
}
 
Action* BasicTest::actionScale()
{
    auto scale = ScaleBy::create(1.33f, 1.5f);
    return RepeatForever::create(Sequence::create(scale, scale->reverse(), nullptr));
}
 
DrawNode* BasicTest::shape()
{
    auto shape = DrawNode::create();
    static Vec2 triangle[3];
    triangle[0] = Vec2(-100, -100);
    triangle[1] = Vec2(100, -100);
    triangle[2] = Vec2(0, 100);
 
    static Color4F green(0, 1, 0, 1);
    shape->drawPolygon(triangle, 3, green, 0, green);
    return shape;
}
 
Sprite* BasicTest::grossini()
{
    auto grossini = Sprite::create(s_pathGrossini);
    grossini->setScale( 1.5 );
    return grossini;
}
 
Node* BasicTest::stencil()
{
    return nullptr;
}
 
ClippingNode* BasicTest::clipper()
{
    return ClippingNode::create();
}
 
Node* BasicTest::content()
{
    return nullptr;
}
 
 
// ShapeTest
 
std::string ShapeTest::title() const
{
    return "Shape Basic Test";
}
 
std::string ShapeTest::subtitle() const
{
    return "A DrawNode as stencil and Sprite as content";
}
 
Node* ShapeTest::stencil()
{
    auto node = this->shape();
    node->runAction(this->actionRotate());
    return node;
}
 
Node* ShapeTest::content()
{
    auto node = this->grossini();
    node->runAction(this->actionScale());
    return node;
}
 
 
// ShapeInvertedTest
 
std::string ShapeInvertedTest::title() const
{
    return "Shape Inverted Basic Test";
}
 
std::string ShapeInvertedTest::subtitle() const
{
    return "A DrawNode as stencil and Sprite as content, inverted";
}
 
ClippingNode* ShapeInvertedTest::clipper()
{
    auto clipper = ShapeTest::clipper();
    clipper->setInverted(true);
    return clipper;
}
 
// SpriteTest
 
std::string SpriteTest::title() const
{
    return "Sprite Basic Test";
}
 
std::string SpriteTest::subtitle() const
{
    return "A Sprite as stencil and DrawNode as content";
}
 
Node* SpriteTest::stencil()
{
    auto node = this->grossini();
    node->runAction(this->actionRotate());
    return node;
}
 
ClippingNode* SpriteTest::clipper()
{
    auto clipper = BasicTest::clipper();
    clipper->setAlphaThreshold(0.05f);
    return clipper;
}
 
Node* SpriteTest::content()
{
    auto node = this->shape();
    node->runAction(this->actionScale());
    return node;
}
 
// SpriteNoAlphaTest
 
std::string SpriteNoAlphaTest::title() const
{
    return "Sprite No Alpha Basic Test";
}
 
std::string SpriteNoAlphaTest::subtitle() const
{
    return "A Sprite as stencil and DrawNode as content, no alpha";
}
 
ClippingNode* SpriteNoAlphaTest::clipper()
{
    auto clipper = SpriteTest::clipper();
    clipper->setAlphaThreshold(1);
    return clipper;
}
 
// SpriteInvertedTest
 
std::string SpriteInvertedTest::title() const
{
    return "Sprite Inverted Basic Test";
}
 
std::string SpriteInvertedTest::subtitle() const
{
    return "A Sprite as stencil and DrawNode as content, inverted";
}
 
ClippingNode* SpriteInvertedTest::clipper()
{
    auto clipper = SpriteTest::clipper();
    clipper->setAlphaThreshold(0.05f);
    clipper->setInverted(true);
    return clipper;
}
 
// NestedTest
 
std::string NestedTest::title() const
{
    return "Nested Test";
}
 
std::string NestedTest::subtitle() const
{
    return "Nest 9 Clipping Nodes, max is usually 8";
}
 
void NestedTest::setup()
{
    static int depth = 9;
    
    Node* parent = this;
    
    for (int i = 0; i < depth; i++) {
                
        int size = 225 - i * (225 / (depth * 2));
 
        auto clipper = ClippingNode::create();
        clipper->setContentSize(Size(size, size));
        clipper->setAnchorPoint(Vec2(0.5f, 0.5f));
        clipper->setPosition(parent->getContentSize().width / 2, parent->getContentSize().height / 2);
        clipper->setAlphaThreshold(0.05f);
        clipper->runAction(RepeatForever::create(RotateBy::create(i % 3 ? 1.33f : 1.66f, i % 2 ? 90.0f : -90.0f)));
        parent->addChild(clipper);
        
        auto stencil = Sprite::create(s_pathGrossini);
        stencil->setScale( 2.5f - (i * (2.5f / depth)) );
        stencil->setAnchorPoint( Vec2(0.5f, 0.5f) );
        stencil->setPosition(clipper->getContentSize().width / 2, clipper->getContentSize().height / 2);
        stencil->setVisible(false);
        stencil->runAction(Sequence::createWithTwoActions(DelayTime::create(i), Show::create()));
        clipper->setStencil(stencil);
 
        clipper->addChild(stencil);
        
        parent = clipper;
    }
 
}
 
// HoleDemo
 
HoleDemo::~HoleDemo()
{
    CC_SAFE_RELEASE(_outerClipper);
    CC_SAFE_RELEASE(_holes);
    CC_SAFE_RELEASE(_holesStencil);
}
 
std::string HoleDemo::title() const
{
    return "Hole Demo";
}
 
std::string HoleDemo::subtitle() const
{
    return "Touch/click to poke holes";
}
 
void HoleDemo::setup()
{
    auto target = Sprite::create(s_pathBlock);
    target->setAnchorPoint(Vec2::ZERO);
    target->setScale(3);
    
    _outerClipper = ClippingNode::create();
    _outerClipper->retain();
    AffineTransform transform = AffineTransform::IDENTITY;
    transform = AffineTransformScale(transform, target->getScale(), target->getScale());
 
    _outerClipper->setContentSize(SizeApplyAffineTransform(target->getContentSize(), transform));
    _outerClipper->setAnchorPoint( Vec2(0.5f, 0.5f) );
    _outerClipper->setPosition(Vec2(this->getContentSize()) * 0.5f);
    _outerClipper->runAction(RepeatForever::create(RotateBy::create(1, 45)));
    
    _outerClipper->setStencil( target );
    
    auto holesClipper = ClippingNode::create();
    holesClipper->setInverted(true);
    holesClipper->setAlphaThreshold( 0.05f );
    
    holesClipper->addChild(target);
    
    _holes = Node::create();
    _holes->retain();
    
    holesClipper->addChild(_holes);
    
    _holesStencil = Node::create();
    _holesStencil->retain();
    
    holesClipper->setStencil( _holesStencil);
    
    _outerClipper->addChild(holesClipper);
 
    this->addChild(_outerClipper);
 
    auto listener = EventListenerTouchAllAtOnce::create();
    listener->onTouchesBegan = CC_CALLBACK_2(HoleDemo::onTouchesBegan, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
}
 
void HoleDemo::pokeHoleAtPoint(Vec2 point)
{
    float scale = CCRANDOM_0_1() * 0.2 + 0.9;
    float rotation = CCRANDOM_0_1() * 360;
    
    auto hole = Sprite::create("Images/hole_effect.png");
    hole->setPosition( point );
    hole->setRotation( rotation );
    hole->setScale( scale );
    
    _holes->addChild(hole);
    
    auto holeStencil = Sprite::create("Images/hole_stencil.png");
    holeStencil->setPosition( point );
    holeStencil->setRotation( rotation );
    holeStencil->setScale( scale );
    
    _holesStencil->addChild(holeStencil);
 
    _outerClipper->runAction(Sequence::createWithTwoActions(ScaleBy::create(0.05f, 0.95f),
                                               ScaleTo::create(0.125f, 1)));
}
 
 
void HoleDemo::onTouchesBegan(const std::vector<Touch*>& touches, Event* event)
{
    Touch *touch = (Touch *)touches[0];
    Vec2 point = _outerClipper->convertToNodeSpace(Director::getInstance()->convertToGL(touch->getLocationInView()));
    auto rect = Rect(0, 0, _outerClipper->getContentSize().width, _outerClipper->getContentSize().height);
    if (!rect.containsPoint(point)) return;
    this->pokeHoleAtPoint(point);
}
 
// ScrollViewDemo
 
std::string ScrollViewDemo::title() const
{
    return "Scroll View Demo";
}
 
std::string ScrollViewDemo::subtitle() const
{
    return "Move/drag to scroll the content";
}
 
void ScrollViewDemo::setup()
{
    auto clipper = ClippingNode::create();
    clipper->setTag( kTagClipperNode );
    clipper->setContentSize(  Size(200.0f, 200.0f) );
    clipper->setAnchorPoint(  Vec2(0.5f, 0.5f) );
    clipper->setPosition(this->getContentSize().width / 2, this->getContentSize().height / 2);
    clipper->runAction(RepeatForever::create(RotateBy::create(1, 45)));
    this->addChild(clipper);
 
    auto stencil = DrawNode::create();
    Vec2 rectangle[4];
    rectangle[0] = Vec2(0.0f, 0.0f);
    rectangle[1] = Vec2(clipper->getContentSize().width, 0.0f);
    rectangle[2] = Vec2(clipper->getContentSize().width, clipper->getContentSize().height);
    rectangle[3] = Vec2(0.0f, clipper->getContentSize().height);
    
    Color4F white(1, 1, 1, 1);
    stencil->drawPolygon(rectangle, 4, white, 1, white);
    clipper->setStencil(stencil);
 
    auto content = Sprite::create(s_back2);
    content->setTag( kTagContentNode );
    content->setAnchorPoint(  Vec2(0.5f, 0.5f) );
    content->setPosition(clipper->getContentSize().width / 2, clipper->getContentSize().height / 2);
    clipper->addChild(content);
    
    _scrolling = false;
 
    auto listener = EventListenerTouchAllAtOnce::create();
    listener->onTouchesBegan = CC_CALLBACK_2(ScrollViewDemo::onTouchesBegan, this);
    listener->onTouchesMoved = CC_CALLBACK_2(ScrollViewDemo::onTouchesMoved, this);
    listener->onTouchesEnded = CC_CALLBACK_2(ScrollViewDemo::onTouchesEnded, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
}
 
void ScrollViewDemo::onTouchesBegan(const std::vector<Touch*>& touches, Event  *event)
{
    Touch *touch = touches[0];
    auto clipper = this->getChildByTag(kTagClipperNode);
    Vec2 point = clipper->convertToNodeSpace(Director::getInstance()->convertToGL(touch->getLocationInView()));
    auto rect = Rect(0, 0, clipper->getContentSize().width, clipper->getContentSize().height);
    _scrolling = rect.containsPoint(point);
    _lastPoint = point;
}
 
void ScrollViewDemo::onTouchesMoved(const std::vector<Touch*>& touches, Event  *event)
{
    if (!_scrolling) return;
    Touch *touch = touches[0];
    auto clipper = this->getChildByTag(kTagClipperNode);
    auto point = clipper->convertToNodeSpace(Director::getInstance()->convertToGL(touch->getLocationInView()));
    Vec2 diff = point - _lastPoint;
    auto content = clipper->getChildByTag(kTagContentNode);
    content->setPosition(content->getPosition() + diff);
    _lastPoint = point;
}
 
void ScrollViewDemo::onTouchesEnded(const std::vector<Touch*>& touches, Event  *event)
{
    if (!_scrolling) return;
    _scrolling = false;
}
 
// RawStencilBufferTests
 
//#if COCOS2D_DEBUG > 1
 
static const float _alphaThreshold = 0.05f;
 
static const int _planeCount = 8;
static const float _planeColor[][4] = {
    {0, 0, 0, 0.65f},
    {0.7f, 0, 0, 0.6f},
    {0, 0.7f, 0, 0.55f},
    {0, 0, 0.7f, 0.5f},
    {0.7f, 0.7f, 0, 0.45f},
    {0, 0.7f, 0.7f, 0.4f},
    {0.7f, 0, 0.7f, 0.35f},
    {0.7f, 0.7f, 0.7f, 0.3f},
};
 
RawStencilBufferTest::~RawStencilBufferTest()
{
}
 
std::string RawStencilBufferTest::title() const
{
    return "Raw Stencil Tests";
}
 
std::string RawStencilBufferTest::subtitle() const
{
    return "1:Default";
}
 
void RawStencilBufferTest::setup()
{
    for(int i = 0; i < _planeCount; ++i)
    {
        Sprite* sprite = Sprite::create(s_pathGrossini);
        sprite->setAnchorPoint(  Vec2(0.5, 0) );
        sprite->setScale( 2.5f );
        _sprites.pushBack(sprite);
 
        Sprite* sprite2 = Sprite::create(s_pathGrossini);
        sprite2->setAnchorPoint(  Vec2(0.5, 0) );
        sprite2->setScale( 2.5f );
        _spritesStencil.pushBack(sprite2);
    }
 
    initCommands();
}
 
void RawStencilBufferTest::initCommands()
{
    auto renderer = Director::getInstance()->getRenderer();
    _enableStencilCallback.func = [=](){
        renderer->setStencilTest(true);
    };
    _enableStencilCallback.init(_globalZOrder);
 
    _disableStencilCallback.func = [=](){
        renderer->setStencilTest(false);
    };
    _disableStencilCallback.init(_globalZOrder);
 
    auto program = backend::Program::getBuiltinProgram(backend::ProgramType::POSITION_UCOLOR);
    _programState = new (std::nothrow) backend::ProgramState(program);
    _locColor = _programState->getProgram()->getUniformLocation("u_color");
    _locMVPMatrix = _programState->getProgram()->getUniformLocation("u_MVPMatrix");
    const auto& projectionMat = Director::getInstance()->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
    _programState->setUniform(_locMVPMatrix, projectionMat.m, sizeof(projectionMat.m));
 
    size_t neededCmdSize = _planeCount * 2;
    _renderCmds.resize(neededCmdSize);
    auto winPoint = Vec2(Director::getInstance()->getWinSize());
    auto planeSize = winPoint * (1.0 / _planeCount);
    BlendFunc blend;
    blend.src = backend::BlendFactor::ONE;
    blend.dst = backend::BlendFactor::ONE_MINUS_SRC_ALPHA;
    for (int i = 0, cmdIndex = 0; i < _planeCount; i++)
    {
        auto stencilPoint = planeSize * (_planeCount - i);
        stencilPoint.x = winPoint.x;
 
        auto& cmd = _renderCmds[cmdIndex];
        cmdIndex++;
        cmd.init(_globalZOrder, blend);
        cmd.setBeforeCallback( CC_CALLBACK_0(RawStencilBufferTest::onBeforeDrawClip, this, i) );
        Vec2 vertices[] = {
            Vec2::ZERO,
            Vec2(stencilPoint.x, 0.0f),
            stencilPoint,
            Vec2(0.0f, stencilPoint.y)
        };
        unsigned short indices[] = {0, 2, 1, 0, 3, 2};
        cmd.createVertexBuffer(sizeof(Vec2), 4, backend::BufferUsage::STATIC);
        cmd.updateVertexBuffer(vertices, sizeof(vertices));
        cmd.createIndexBuffer(backend::IndexFormat::U_SHORT, 6, backend::BufferUsage::STATIC);
        cmd.updateIndexBuffer(indices, sizeof(indices));
        cmd.getPipelineDescriptor().programState = _programState;
        auto vertexLayout = _programState->getVertexLayout();
        auto& attributes = _programState->getProgram()->getActiveAttributes();
        auto iter = attributes.find("a_position");
        if (iter != attributes.end())
            vertexLayout->setAttribute("a_position", iter->second.location, backend::VertexFormat::FLOAT2, 0, false);
        vertexLayout->setLayout(sizeof(Vec2));
 
 
        auto& cmd2 = _renderCmds[cmdIndex];
        cmdIndex++;
        cmd2.init(_globalZOrder, blend);
        cmd2.setBeforeCallback(CC_CALLBACK_0(RawStencilBufferTest::onBeforeDrawSprite, this, i));
        Vec2 vertices2[] = {
            Vec2::ZERO,
            Vec2(winPoint.x, 0.0f),
            winPoint,
            Vec2(0.0f, winPoint.y)
        };
        cmd2.createVertexBuffer(sizeof(Vec2), 4, backend::BufferUsage::STATIC);
        cmd2.updateVertexBuffer(vertices2, sizeof(vertices2));
        cmd2.createIndexBuffer(backend::IndexFormat::U_SHORT, 6, backend::BufferUsage::STATIC);
        cmd2.updateIndexBuffer(indices, sizeof(indices));
        cmd2.getPipelineDescriptor().programState = _programState;
    }
}
 
void RawStencilBufferTest::draw(Renderer *renderer, const Mat4 &transform, uint32_t flags)
{    
    auto winPoint = Vec2(Director::getInstance()->getWinSize());
    auto planeSize = winPoint * (1.0 / _planeCount);
 
    renderer->addCommand(&_enableStencilCallback);
 
    for (int i = 0, cmdIndex = 0; i < _planeCount; i++)
    {
        auto spritePoint = planeSize * i;
        spritePoint.x += planeSize.x / 2;
        spritePoint.y = 0;
        _sprites.at(i)->setPosition( spritePoint );
        _spritesStencil.at(i)->setPosition( spritePoint );
 
        renderer->clear(ClearFlag::STENCIL, Color4F::BLACK, 0.f, 0x0, _globalZOrder);
 
        renderer->addCommand(&_renderCmds[cmdIndex]);
        cmdIndex++;
        
        Director* director = Director::getInstance();
        CCASSERT(nullptr != director, "Director is null when setting matrix stack");
        director->pushMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
        
        _modelViewTransform = this->transform(transform);
        _spritesStencil.at(i)->visit(renderer, _modelViewTransform, flags);
        director->popMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
                
        renderer->addCommand(&_renderCmds[cmdIndex]);
        cmdIndex++;
        
        director->pushMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
        _modelViewTransform = this->transform(transform);
        _sprites.at(i)->visit(renderer, _modelViewTransform, flags);
        director->popMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
    }
 
    renderer->addCommand(&_disableStencilCallback);
}
 
void RawStencilBufferTest::onBeforeDrawClip(int planeIndex)
{
    this->setupStencilForClippingOnPlane(planeIndex);
    float color[4] = {1.f, 1.f, 1.f, 1.f};
    _programState->setUniform(_locColor, color, sizeof(color));
}
 
void RawStencilBufferTest::onBeforeDrawSprite(int planeIndex)
{
    this->setupStencilForDrawingOnPlane(planeIndex);
    auto& color = _planeColor[planeIndex];
    _programState->setUniform(_locColor, (void*)color, sizeof(color));
}
 
void RawStencilBufferTest::setupStencilForClippingOnPlane(int plane)
{
    auto renderer = Director::getInstance()->getRenderer();
    unsigned int planeMask = 0x1 << plane;
    renderer->setStencilWriteMask(planeMask);
    renderer->setStencilCompareFunction(backend::CompareFunction::NEVER, planeMask, planeMask);
    renderer->setStencilOperation(backend::StencilOperation::REPLACE, backend::StencilOperation::KEEP, backend::StencilOperation::KEEP);
}
 
void RawStencilBufferTest::setupStencilForDrawingOnPlane(int plane)
{
    auto renderer = Director::getInstance()->getRenderer();
    unsigned int planeMask = 0x1 << plane;
    renderer->setStencilCompareFunction(backend::CompareFunction::EQUAL, planeMask, planeMask);
    renderer->setStencilOperation(backend::StencilOperation::KEEP, backend::StencilOperation::KEEP, backend::StencilOperation::KEEP);
}
 
//@implementation RawStencilBufferTest2
 
std::string RawStencilBufferTest2::subtitle() const
{
    return "2:DepthMask:FALSE";
}
 
void RawStencilBufferTest2::setupStencilForClippingOnPlane(int plane)
{
    RawStencilBufferTest::setupStencilForClippingOnPlane(plane);
    Director::getInstance()->getRenderer()->setDepthWrite(false);
}
 
void RawStencilBufferTest2::setupStencilForDrawingOnPlane(int plane)
{
    Director::getInstance()->getRenderer()->setDepthWrite(true);
    RawStencilBufferTest::setupStencilForDrawingOnPlane(plane);
}
 
//@implementation RawStencilBufferTest3
 
std::string RawStencilBufferTest3::subtitle() const
{
    return "3:DepthTest:DISABLE,DepthMask:FALSE";
}
 
void RawStencilBufferTest3::setupStencilForClippingOnPlane(int plane)
{
    RawStencilBufferTest::setupStencilForClippingOnPlane(plane);
    auto renderer = Director::getInstance()->getRenderer();
    renderer->setDepthTest(false);
    renderer->setDepthWrite(false);
}
 
void RawStencilBufferTest3::setupStencilForDrawingOnPlane(int plane)
{
    Director::getInstance()->getRenderer()->setDepthWrite(true);
    RawStencilBufferTest::setupStencilForDrawingOnPlane(plane);
}
 
void RawStencilBufferTestAlphaTest::setup()
{
    RawStencilBufferTest::setup();
    for(int i = 0; i < _planeCount; ++i)
    {
        auto program = backend::Program::getBuiltinProgram(backend::ProgramType::POSITION_TEXTURE_COLOR_ALPHA_TEST);
        auto programState = new backend::ProgramState(program);
        programState->setUniform(programState->getUniformLocation("u_alpha_value"), &_alphaThreshold, sizeof(_alphaThreshold));
        _spritesStencil.at(i)->setProgramState(programState);
    }
}
//@implementation RawStencilBufferTest4
 
std::string RawStencilBufferTest4::subtitle() const
{
    return "4:DepthMask:FALSE,AlphaTest:ENABLE";
}
 
void RawStencilBufferTest4::setupStencilForClippingOnPlane(int plane)
{
    RawStencilBufferTest::setupStencilForClippingOnPlane(plane);
    auto renderer = Director::getInstance()->getRenderer();
    renderer->setDepthWrite(false);
}
 
void RawStencilBufferTest4::setupStencilForDrawingOnPlane(int plane)
{
    Director::getInstance()->getRenderer()->setDepthWrite(true);
    RawStencilBufferTest::setupStencilForDrawingOnPlane(plane);
}
 
//@implementation RawStencilBufferTest5
 
std::string RawStencilBufferTest5::subtitle() const
{
    return "5:DepthTest:DISABLE,DepthMask:FALSE,AlphaTest:ENABLE";
}
 
void RawStencilBufferTest5::setupStencilForClippingOnPlane(int plane)
{
    RawStencilBufferTest::setupStencilForClippingOnPlane(plane);
    auto renderer = Director::getInstance()->getRenderer();
    renderer->setDepthWrite(false);
    renderer->setDepthTest(false);
}
 
void RawStencilBufferTest5::setupStencilForDrawingOnPlane(int plane)
{
    auto renderer = Director::getInstance()->getRenderer();
    renderer->setDepthWrite(false);
    RawStencilBufferTest::setupStencilForDrawingOnPlane(plane);
}
 
//@implementation RawStencilBufferTest6
 
std::string RawStencilBufferTest6::subtitle() const
{
    return "6:ManualClear,AlphaTest:ENABLE";
}
 
void RawStencilBufferTest6::setup()
{
    RawStencilBufferTestAlphaTest::setup();
    Director::getInstance()->getRenderer()->setStencilWriteMask(~0);
}
 
void RawStencilBufferTest6::setupStencilForClippingOnPlane(int plane)
{
    int planeMask = 0x1 << plane;
    auto renderer = Director::getInstance()->getRenderer();
    renderer->setStencilCompareFunction(backend::CompareFunction::NEVER, planeMask, planeMask);
    renderer->setStencilOperation(backend::StencilOperation::REPLACE, backend::StencilOperation::KEEP, backend::StencilOperation::KEEP);
    renderer->setDepthTest(false);
    renderer->setDepthWrite(false);
}
 
void RawStencilBufferTest6::setupStencilForDrawingOnPlane(int plane)
{
    auto renderer = Director::getInstance()->getRenderer();
    renderer->setDepthWrite(true);
    RawStencilBufferTest::setupStencilForDrawingOnPlane(plane);
}
 
//#endif // COCOS2D_DEBUG > 1
 
//ClippingToRenderTextureTest
 
std::string ClippingToRenderTextureTest::title() const
{
    return "Clipping to RenderTexture";
}
 
std::string ClippingToRenderTextureTest::subtitle() const
{
    return "Both should look the same";
}
 
void ClippingToRenderTextureTest::setup()
{
    auto button = MenuItemFont::create("Reproduce bug", [&](Ref *sender) {
        std::vector<Node*> nodes;
        enumerateChildren("remove me [0-9]", [&](Node *node) {
            nodes.push_back(node);
            return false;
        });
        for (auto node : nodes)
        {
            this->removeChild(node);
        }
        this->reproduceBug();
    });
 
    auto s = Director::getInstance()->getWinSize();
    // create menu, it's an autorelease object
    auto menu = Menu::create(button, nullptr);
    menu->setPosition(Point(s.width/2, s.height/2));
    this->addChild(menu, 1);
 
    expectedBehaviour();
}
 
void ClippingToRenderTextureTest::expectedBehaviour()
{
    auto director = Director::getInstance();
    Size visibleSize = director->getVisibleSize();
    Point origin = director->getVisibleOrigin();
 
 
    // add "HelloWorld" splash screen"
    auto sprite = Sprite::create("Images/grossini.png");
 
    // position the sprite on the center of the screen
    sprite->setPosition(Point(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
 
    // add the sprite as a child to this layer
    this->addChild(sprite, 0);
    sprite->setName("remove me 0");
 
    // container node that will contain the clippingNode
    auto container = Node::create();
    this->addChild(container);
    container->setName("remove me 1");
 
    auto stencil = DrawNode::create();
    Point triangle[3];
    triangle[0] = Point(-50, -50);
    triangle[1] = Point(50, -50);
    triangle[2] = Point(0, 50);
    Color4F green(0, 1, 0, 1);
    stencil->drawPolygon(triangle, 3, green, 0, green);
 
    auto clipper = ClippingNode::create();
    clipper->setAnchorPoint(Point(0.5f, 0.5f));
    clipper->setPosition( Point(visibleSize.width/2, visibleSize.height/2) );
    clipper->setStencil(stencil);
    clipper->setInverted(true);
    container->addChild(clipper, 1);
 
 
    auto img = DrawNode::create();
    triangle[0] = Point(-200, -200);
    triangle[1] = Point(200, -200);
    triangle[2] = Point(0, 200);
    Color4F red(1, 0, 0, 1);
    img->drawPolygon(triangle, 3, red, 0, red);
    clipper->addChild(img);
}
 
void ClippingToRenderTextureTest::reproduceBug()
{
    auto director = Director::getInstance();
    Size visibleSize = director->getVisibleSize();
    Point origin = director->getVisibleOrigin();
 
 
    // add "HelloWorld" splash screen"
    auto sprite = Sprite::create("Images/grossini.png");
 
    // position the sprite on the center of the screen
    sprite->setPosition(Point(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
 
    // add the sprite as a child to this layer
    this->addChild(sprite, 0);
 
 
    // container node that will contain the clippingNode
    auto container = Node::create();
    container->retain();
 
    auto stencil = DrawNode::create();
    Point triangle[3];
    triangle[0] = Point(-50, -50);
    triangle[1] = Point(50, -50);
    triangle[2] = Point(0, 50);
    Color4F green(0, 1, 0, 1);
    stencil->drawPolygon(triangle, 3, green, 0, green);
 
    auto clipper = ClippingNode::create();
    clipper->setAnchorPoint(Point(0.5f, 0.5f));
    clipper->setPosition( Point(visibleSize.width/2, visibleSize.height/2) );
    clipper->setStencil(stencil);
    clipper->setInverted(true);
    container->addChild(clipper, 1);
 
 
    auto img = DrawNode::create();
    triangle[0] = Point(-200, -200);
    triangle[1] = Point(200, -200);
    triangle[2] = Point(0, 200);
    Color4F red(1, 0, 0, 1);
    img->drawPolygon(triangle, 3, red, 0, red);
    clipper->addChild(img);
 
    // container rendered on Texture the size of the screen and because Clipping node use stencil buffer so we need to
    // create RenderTexture with depthStencil format parameter
    RenderTexture* rt = RenderTexture::create(visibleSize.width, visibleSize.height, backend::PixelFormat::RGBA8888, PixelFormat::D24S8);
    rt->setPosition(visibleSize.width/2, visibleSize.height/2);
    this->addChild(rt);
 
    rt->begin();
    container->visit();
    rt->end();
}
 
// ClippingRectangleNodeDemo
 
std::string ClippingRectangleNodeTest::title() const
{
    return "ClippingRectangleNode Test";
}
 
std::string ClippingRectangleNodeTest::subtitle() const
{
    return "more effectively";
}
 
void ClippingRectangleNodeTest::setup()
{
    auto clipper = ClippingRectangleNode::create();
    clipper->setClippingRegion(Rect(this->getContentSize().width / 2 - 100, this->getContentSize().height / 2 - 100, 200.0f, 200.0f));
    clipper->setTag( kTagClipperNode );
    this->addChild(clipper);
    
    auto content = Sprite::create(s_back2);
    content->setTag( kTagContentNode );
    content->setAnchorPoint(  Vec2(0.5f, 0.5f) );
    content->setPosition(this->getContentSize().width / 2, this->getContentSize().height / 2);
    clipper->addChild(content);
}