C++ CCRenderTexture类代码示例

CCSprite *Puzzle::spriteImageMask() {
	
    // 1: Create new CCRenderTexture
    CCRenderTexture *rt = CCRenderTexture::renderTextureWithWidthAndHeight(Puzzle::canvasSize.width, Puzzle::canvasSize.height);
	
    // 2: Call CCRenderTexture:begin
    rt->beginWithClear(0, 0, 0, 0);
	
    // 3: Draw into the texture
	CCPoint vertices[4];
	
	glColor4ub(255, 255, 255, 255);
	for (int i = 0; i < numtaken; i++) {
		vertices[0] = ccp(taken[i].x, taken[i].y);
		vertices[1] = ccp(taken[i].x, taken[i].y + dimY);
		vertices[2] = ccp(taken[i].x + dimX, taken[i].y + dimY);
		vertices[3] = ccp(taken[i].x + dimX, taken[i].y);
		
		ccDrawPoly(vertices, 4, true, true);
	}
	
    // 4: Call CCRenderTexture:end
    rt->end();
	
    // 5: Create a new Sprite from the texture
	CCSprite *ret = CCSprite::spriteWithTexture(rt->getSprite()->getTexture());
	ret->setFlipY(true);
    return ret;
}

void RenderTextureZbuffer::renderScreenShot()
{
	CCRenderTexture *texture = CCRenderTexture::renderTextureWithWidthAndHeight(512, 512);
	if (NULL == texture)
	{
		return;
	}
	texture->setAnchorPoint(ccp(0, 0));
	texture->begin();

	this->visit();

	texture->end();

	CCSprite *sprite = CCSprite::spriteWithTexture(texture->getSprite()->getTexture());

	sprite->setPosition(ccp(256, 256));
	sprite->setOpacity(182);
	sprite->setFlipY(1);
	this->addChild(sprite, 999999);
	sprite->setColor(ccGREEN);

	sprite->runAction(CCSequence::actions(CCFadeTo::actionWithDuration(2, 0),
		                                  CCHide::action(),
		                                  NULL));
}

CCRenderTexture * Utils::fontCreateStroke(CCLabelTTF * label,float size, ccColor3B color){
    
    CCRenderTexture *rt = CCRenderTexture::create((int)label->getTexture()->getContentSize().width, (int)label->getTexture()->getContentSize().height);
    CCPoint originalPos = label->getPosition();
    ccColor3B originalColor = label->getColor();
    bool originalVisibility = label->isVisible();

    label->setColor(color);
    
    ccBlendFunc originalBlend = label->getBlendFunc();
    label->setBlendFunc((ccBlendFunc){ GL_SRC_ALPHA, GL_ONE });
    //CCPoint center = ccp(label->getTexture()->getContentSize().width/2 + size, label->getTexture()->getContentSize().height/2 + size); //shadow effect offset
    
    CCPoint center = ccp(label->getTexture()->getContentSize().width/2, label->getTexture()->getContentSize().height/2);
    
    rt->begin();
    
    for(int i = 0; i<360; i+=30){
        label->setPosition(ccp(center.x + sin(CC_DEGREES_TO_RADIANS(i)) * size, center.y + cos(CC_DEGREES_TO_RADIANS(i)) * size));
        label->visit();
    }
    
    rt->end();
    
    label->setPosition(originalPos);
    label->setColor(originalColor);
    label->setBlendFunc(originalBlend);
    label->setVisible(originalVisibility);
    
    rt->setPosition(originalPos);
    
    return rt;
}

bool GameUtil::resizeImage(const char* szInFile, const char* szOutFile, int width, int height)
{
	CCLog("GameUtil::resizeImage - [path:%s] [W:%d] [H:%d]", szInFile, width, height);
	CCSprite* pOrg = CCSprite::create(szInFile);
	CCSize orgSize = pOrg->getContentSize();

	float fScaleX = (float)width / orgSize.width;
	float fScaleY = (float)height / orgSize.height;
	float fScale = max(fScaleX, fScaleY);

	CCPoint ptCenter = ccp(width/2, height/2);

	// 세로 사진은 가로로 방향을 변경
	if (orgSize.width < orgSize.height) {
		pOrg->setRotation(90.0f);
		ptCenter = ccp(height/2, width/2);
	}

	CCRenderTexture * rt = CCRenderTexture::create(width, height);
 
	pOrg->setPosition(ptCenter);
	pOrg->setAnchorPoint(ccp(0.5f, 0.5f));
	pOrg->setScale(fScale);
 
    rt->begin();
    pOrg->visit();
    rt->end();
	
	// 파일로 저장
	bool bSave = rt->saveToFile(szOutFile);

	return bSave;
}

CCSprite* CCSprite::createWithColor(ccColor4F bgColor, float textureWidth, float textureHeight)
{
    CCRenderTexture *rt = CCRenderTexture::create(textureWidth, textureHeight);
    rt->beginWithClear(bgColor.r, bgColor.g, bgColor.b, bgColor.a);
    rt->end();
    return CCSprite::createWithTexture(rt->getSprite()->getTexture());
}

CCSprite* GameUtil::mergeSprite(CCSprite* pOrg1, CCSprite* pOrg2)
{
	CCPoint ptOrg1(pOrg1->getPosition());
	CCPoint ptOrg2(pOrg2->getPosition());

	CCRenderTexture * rt = CCRenderTexture::create((int)pOrg1->getContentSize().width, (int)pOrg1->getContentSize().height);
 
	pOrg1->setPosition(ccp(pOrg1->getContentSize().width/2, pOrg1->getContentSize().height/2));
	pOrg2->setPosition(ccp(pOrg2->getContentSize().width/2, pOrg2->getContentSize().height/2));
 
    rt->begin();
    pOrg1->visit();
    pOrg2->visit();
    rt->end();
	
	pOrg1->setPosition(ptOrg1);
	pOrg2->setPosition(ptOrg2);

	CCSprite *retSprite = CCSprite::createWithTexture(rt->getSprite()->getTexture());
	retSprite->setFlipY(true);

	//CCSize sisze1 = retSprite->getContentSize();
	//CCSize size2 = retSprite->getTexture()->getContentSize();

	// debugging : 파일로 저장
	//string sPath = CCFileUtils::sharedFileUtils()->getWriteablePath();
	//sPath.c_str();
	//char szSave[MAX_PATH];
	//sprintf(szSave, "%ssave.png", sPath.c_str());
	//bool bSave = rt->saveToFile(szSave);

	return retSprite;
}

CCTexture2D* Sky::generateTexture()
{
    CCRenderTexture* pRenderTexture = CCRenderTexture::create(m_nTextureSize, m_nTextureSize);
    pRenderTexture->beginWithClear(0.55f, 0.80f, 0.86f, 1.0f);
    
    //gradient
    float alpha = 1.0f;
    ccColor4B color1 = {255, 255, 255, 0};
    ccColor4B color2 = {255, 255, 255, 255};
    CCLayerGradient* pLayerColor = CCLayerGradient::create(color1, color2);
    pLayerColor->setContentSize(CCSizeMake(m_nTextureSize, m_nTextureSize));
    pLayerColor->setPosition(ccp(0, 0));
    pLayerColor->visit();
    
    //noise
    CCSprite* pSprite = CCSprite::create("noise.png");
    pSprite->setPosition(ccp(m_nTextureSize / 2, m_nTextureSize / 2));
    pSprite->setBlendFunc((ccBlendFunc){GL_DST_COLOR, GL_ZERO});
    pSprite->setScale(m_nTextureSize / 512.0f);
    pSprite->visit();
    
    pRenderTexture->end();
    CCTexture2D* pTex = pRenderTexture->getSprite()->getTexture();
    ccTexParams params = {GL_NEAREST, GL_NEAREST, GL_REPEAT, GL_REPEAT};
    pTex->setTexParameters(&params);
    return pTex;

}

static CCString ScreenShoot()
{
	CCSize size = CCDirector::sharedDirector()->getWinSize();  
	//定义一个屏幕大小的渲染纹理  
	CCRenderTexture* pScreen = CCRenderTexture::create(size.width,size.height, kCCTexture2DPixelFormat_RGBA8888);  
	//获得当前的场景指针  
	CCScene* pCurScene = CCDirector::sharedDirector()->getRunningScene();  
	//渲染纹理开始捕捉  
	pScreen->begin();  
	//当前场景参与绘制  
	pCurScene->visit();  
	//结束捕捉  
	pScreen->end();  
	char szfile[1024]={0};
	//string   pathToSave = "/sdcard/download/";//

	string pathToSave = "ScreenShoot.png";
	//sprintf(szfile,"%s%s",pathToSave.c_str(),"share.png");
	//保存为png
	if(pScreen->saveToFile(pathToSave.c_str(), kCCImageFormatPNG))
	{
		//CCMessageBox("saveToFile ok!", "saveToFile ok!");
	}
	pathToSave = CCFileUtils::sharedFileUtils()->getWritablePath()+pathToSave;
	//保存为jpg
	//pScreen->saveToFile("XXXXXX.jpg", kCCImageFormatJPEG);  
	CC_SAFE_DELETE(pScreen); 

	return pathToSave.c_str();
}

//ÔÝÍ£
void CGameControler::PauseGame(int _type){
	CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
	CCRenderTexture *renderTexture = CCRenderTexture::create(visibleSize.width,visibleSize.height);
	renderTexture->begin(); 
	this->getParent()->visit();
	renderTexture->end();
	CCDirector::sharedDirector()->pushScene(Gamepause::scene(renderTexture));
}

void AsMessageBox::initShareMessageBox(int subType){
    
    if(!MainUser->muted)
        CocosDenshion::SimpleAudioEngine::sharedEngine()->playEffect("openFrame.wav");
    
    shareImageIndex = subType;
    
    //1.截屏
    if (subType == 1) {
        CCRenderTexture* pScreen = CCRenderTexture::create(winSize.width,winSize.height);
        CCScene* pCurScene = CCDirector::sharedDirector()->getRunningScene();
        pScreen->begin();
        pCurScene->visit();
        pScreen->end();
        pScreen->saveToFile("shared.png",kCCImageFormatPNG);
    }

    //2.黑色底层
    cover = CCLayerColor::create(ccc4(0,0,0,200));
    cover->setPosition(CCPointZero);
    addChild(cover,0);
    
    //3.提示框底层
    showbox = CCSprite::createWithSpriteFrameName("shareFrame.png");
    showbox->setScaleY(1.1);
    showbox->setPosition(ccp(size.width/2,size.height/2+winDif*2*alpha));
    cover->addChild(showbox,1);
    
    //4.提示框上的文字
    CCSprite* shareWeixinSprite = CCSprite::createWithSpriteFrameName("shareWeixin.png");
    CCSprite* shareWeixinSprite_s = CCSprite::createWithSpriteFrameName("shareWeixin-s.png");
    CCSprite* shareWeixin1Sprite = CCSprite::createWithSpriteFrameName("shareWeixin1.png");
    CCSprite* shareWeixin1Sprite_s = CCSprite::createWithSpriteFrameName("shareWeixin1-s.png");
    CCSprite* closeSprite = CCSprite::createWithSpriteFrameName("closeMatchTable.png");
    CCSprite* closeSprite_s = CCSprite::createWithSpriteFrameName("closeMatchTable-s.png");
    CCMenuItemSprite* closeItem = CCMenuItemSprite::create(closeSprite,closeSprite_s,this,menu_selector(AsMessageBox::closeMessageBox));
    CCMenuItemSprite* item1 = CCMenuItemSprite::create(shareWeixinSprite,shareWeixinSprite_s,this,menu_selector(AsMessageBox::goShare));
    CCMenuItemSprite* item2 = CCMenuItemSprite::create(shareWeixin1Sprite,shareWeixin1Sprite_s,this,menu_selector(AsMessageBox::goShare));
    item1->setTag(10);
    item2->setTag(11);
    item1->setPosition(ccp(size.width*18/50,size.height*10/20+winDif*2.18*alpha));
    item2->setPosition(ccp(size.width*32/50,size.height*10/20+winDif*2.18*alpha));
    closeItem->setPosition(ccp(size.width*5.7/7,size.height*11.5/20+winDif*2.18*alpha));
    closeMenu = CCMenu::create(item1,item2,closeItem,NULL);
    closeMenu->setPosition(CCPointZero);
    addChild(closeMenu,2);
    
    //5.文字提示
    CCLabelTTF* shareToIndiLabel = CCLabelTTF::create("分享给朋友","Arial Rounded MT Bold",24);
    CCLabelTTF* shareToCircleLabel = CCLabelTTF::create("分享到朋友圈","Arial Rounded MT Bold",24);
    shareToIndiLabel->setColor(ccc3(55, 55, 55));
    shareToCircleLabel->setColor(ccc3(55, 55, 55));
    shareToIndiLabel->setPosition(ccp(size.width*18/50,size.height*8/20+winDif*2.18*alpha));
    shareToCircleLabel->setPosition(ccp(size.width*32/50,size.height*8/20+winDif*2.18*alpha));
    addChild(shareToIndiLabel,7,53);
    addChild(shareToCircleLabel,7,54);
    
}

    CCRenderTexture* UILabelTTF::createStroke(CCLabelTTF* label, float size ,ccColor3B cor)
    {
        float RealSize = size;
        if(label == NULL || label->getTexture() == NULL)
        {
            return NULL;
        }
		label->setAnchorPoint(ccp(0.5, 0.5));
        CCRenderTexture* rt = CCRenderTexture::create(label->getContentSize().width + RealSize*2, label->getContentSize().height + RealSize*2);
		rt->setAnchorPoint(ccp(0.0,0.0));
		rt->setPosition(0,0);
        if(rt->getSprite() && rt->getSprite()->getTexture())
        {
            rt->getSprite()->getTexture()->setAntiAliasTexParameters();
			rt->getSprite()->setOpacityModifyRGB(true);
        }
		else
		{
			CCLog("UILabelTTF null texture");
		}

		CCPoint originalPos = label->getPosition();
		ccColor3B originalColor = label->getColor();
		bool originalVisibility = label->isVisible();
		label->setColor(cor);
		label->setVisible(true);
		ccBlendFunc originalBlend = label->getBlendFunc();
		ccBlendFunc tBlendFunc = {GL_SRC_ALPHA, GL_ONE };
		label->setBlendFunc(tBlendFunc);

		rt->clear(0, 0, 0, 0);
		CCPoint center = ccp(label->getContentSize().width/2 ,label->getContentSize().height /2 );
		rt->begin();
		label->setPosition(ccp(center.x, center.y - RealSize));
		label->visit();
		label->setPosition(ccp(center.x + 2*RealSize, center.y - 2*RealSize));
		label->visit();
		label->setPosition(ccp(center.x + RealSize, center.y));
		label->visit();
		label->setPosition(ccp(center.x + 2*RealSize, center.y - RealSize));
		label->visit();
		label->setColor(originalColor);
		label->setPosition(ccp(center.x,center.y));
		label->visit();
		rt->end();

        label->setBlendFunc(originalBlend);
        label->setVisible(originalVisibility);
        label->setPosition(originalPos);

		// for test
		//char file[100];
		//sprintf(file,"../../temp/%s_creat.png",label->getString());
		//rt->saveToFile(file,kCCImageFormatPNG);
        return rt;
    }

void GameScene::onPause(cocos2d::CCObject *pSender)
{
	pPauseMenu->setVisible(false);
	CCRenderTexture *renderTexture = CCRenderTexture::create(SCREEN_WIDTH, SCREEN_HEIGHT);
    renderTexture->begin();
    this->getParent()->visit();
    renderTexture->end();  //这里实际是通过CCRenderTexture保存当前界面（相当于截屏），然后传递给暂停界面，当成背景精灵
	pPauseMenu->setVisible(true);
    CCDirector::sharedDirector()->pushScene(PauseScene::scene(renderTexture,true));
}

bool HelloWorld::init()
{
    if ( !CCLayer::init() )
    {
        return false;
    }

    CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
    CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();

    CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
                                      "CloseNormal.png",
                                      "CloseSelected.png",
                                      this,
                                      menu_selector(HelloWorld::menuCloseCallback));

    pCloseItem->setPosition(ccp(origin.x + visibleSize.width - pCloseItem->getContentSize().width/2 ,
                                origin.y + pCloseItem->getContentSize().height/2));

    CCMenu* pMenu = CCMenu::create(pCloseItem, NULL);
    pMenu->setPosition(CCPointZero);
    this->addChild(pMenu, 1);

    CCSize size = CCDirector::sharedDirector()->getWinSize();

#if 0
    CCLayerColor *colorLayer = CCLayerColor::create(ccc4(0,80,80,255));
    addChild(colorLayer);

    CCSprite *spr_premulti = CCSprite::create("Ball.png");
    spr_premulti->setPosition(ccp(16,48));

    CCSprite *spr_nonpremulti = CCSprite::create("Ball.png");
    spr_nonpremulti->setPosition(ccp(16,16));


    CCRenderTexture *rend = CCRenderTexture::create(32, 64, kCCTexture2DPixelFormat_RGBA8888);

    if (rend == NULL)
        exit(0);

    rend->begin();
    spr_premulti->visit();
    spr_nonpremulti->visit();
    rend->end();

    addChild(spr_nonpremulti);
    addChild(spr_premulti);
    addChild(rend);
#endif

	scheduleUpdate();

    return true;
}

RenderTextureIssue937::RenderTextureIssue937()
{
    /*
    *     1    2
    * A: A1   A2
    *
    * B: B1   B2
    *
    *  A1: premulti sprite
    *  A2: premulti render
    *
    *  B1: non-premulti sprite
    *  B2: non-premulti render
    */
    CCLayerColor *background = CCLayerColor::layerWithColor(ccc4(200,200,200,255));
    addChild(background);

    CCSprite *spr_premulti = CCSprite::spriteWithFile("Images/fire.png");
    spr_premulti->setPosition(ccp(16,48));

    CCSprite *spr_nonpremulti = CCSprite::spriteWithFile("Images/fire.png");
    spr_nonpremulti->setPosition(ccp(16,16));


    /* A2 & B2 setup */
    CCRenderTexture *rend = CCRenderTexture::renderTextureWithWidthAndHeight(32, 64);

	if (NULL == rend)
	{
		return;
	}

    // It's possible to modify the RenderTexture blending function by
    //		[[rend sprite] setBlendFunc:(ccBlendFunc) {GL_ONE, GL_ONE_MINUS_SRC_ALPHA}];

    rend->begin();
    spr_premulti->visit();
    spr_nonpremulti->visit();
    rend->end(); 

    CCSize s = CCDirector::sharedDirector()->getWinSize();

    /* A1: setup */
    spr_premulti->setPosition(ccp(s.width/2-16, s.height/2+16));
    /* B1: setup */
    spr_nonpremulti->setPosition(ccp(s.width/2-16, s.height/2-16));

    rend->setPosition(ccp(s.width/2+16, s.height/2));

    addChild(spr_nonpremulti);
    addChild(spr_premulti);
    addChild(rend);
}

CCRenderTexture * CCRenderTexture::create(int w ,int h, CCTexture2DPixelFormat eFormat, GLuint uDepthStencilFormat)
{
    CCRenderTexture *pRet = new CCRenderTexture();

    if(pRet && pRet->initWithWidthAndHeight(w, h, eFormat, uDepthStencilFormat))
    {
        pRet->autorelease();
        return pRet;
    }
    CC_SAFE_DELETE(pRet);
    return NULL;
}