gistfile1.txt

#include "HelloWorldScene.h"
 
USING_NS_CC;
 
Scene* HelloWorld::createScene(){
    auto scene = Scene::create();
    auto layer = HelloWorld::create();
    scene->addChild(layer);
    return scene;
}
 
bool HelloWorld::init(){
	if(!Layer::init()){ return false; }
	m_visibleSize = Director::getInstance()->getVisibleSize();
 
	//元画像
	m_spriteSrc = Sprite::create("HelloWorld512.png"); 
	m_texSizeSrc = m_spriteSrc->getTexture()->getContentSizeInPixels();
	m_spriteSrc->setPosition(m_texSizeSrc / 2);
	m_spriteSrc->retain();
//	this->addChild(m_spriteSrc);
 
 	//オフスクリーンレンダリング用のテクスチャ
	m_texture1 = RenderTexture::create(m_texSizeSrc.width, m_texSizeSrc.height);
	m_texture1->setPosition(m_visibleSize / 2);
	m_texture1->retain();

	//こっちに画像データが移せたらよしとする
	m_sprite1 = Sprite::create();
	m_sprite1->setVertexRect(Rect(0, 0, m_texSizeSrc.width, m_texSizeSrc.height));
	m_sprite1->setPosition(m_visibleSize / 2);
	m_sprite1->retain();
	this->addChild(m_sprite1);

	this->scheduleUpdate();
 
	return true;
}
void HelloWorld::update(float delta){
	//元画像をテクスチャバッファに描画
	m_texture1->beginWithClear(0, 0, 0, 1);
	m_spriteSrc->visit();
	m_texture1->end();

	//テクスチャバッファからピクセルデータを取得
	Size texSize = m_spriteSrc->getContentSize();
	int wh = m_texSizeSrc.width * m_texSizeSrc.height;
	Image *image = m_texture1->newImage(false);
	Color4B *pixel = (Color4B*)image->getData();

	Color4B *start = pixel, *end = &pixel[wh];
	while(start != end){
		//ここでピクセルデータを加工する
		++start;
	}

	//加工したピクセルデータをtexture2Dに移す
	Texture2D *t2d = new Texture2D();
	t2d->initWithData(pixel, sizeof(pixel) * texSize.width * texSize.height, Texture2D::PixelFormat::RGBA8888, texSize.width, texSize.height, texSize);
	t2d->initWithImage(image);
	//texture2Dからスプライトに移す
	m_sprite1->setTexture(t2d);
	m_sprite1->setFlipY(true);

	t2d->release();
	image->release();
}

void HelloWorld::menuCloseCallback(Ref* pSender){
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
	MessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");
    return;
#endif
 
    Director::getInstance()->end();
 
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    exit(0);
#endif
}