你可以从下面的目录找到示例的源代码：

cocos2d-x-2.2.1\samples\Cpp\TestCpp\Classes\ShaderTest

SpriteBlur类用于实现高斯模糊，但并没有定义在ShaderTest.h中，打开ShaderTest.cpp，大概在488行有这个类的定义和实现：

// ShaderBlurclass SpriteBlur : public CCSprite
{
public:~SpriteBlur();void setBlurSize(float f);bool initWithTexture(CCTexture2D* texture, const CCRect&  rect);void draw();void initProgram();void listenBackToForeground(CCObject *obj);static SpriteBlur* create(const char *pszFileName);CCPoint blur_;GLfloat    sub_[4];GLuint    blurLocation;GLuint    subLocation;
};

实现：

SpriteBlur::~SpriteBlur()
{CCNotificationCenter::sharedNotificationCenter()->removeObserver(this, EVENT_COME_TO_FOREGROUND);
}SpriteBlur* SpriteBlur::create(const char *pszFileName)
{SpriteBlur* pRet = new SpriteBlur();if (pRet && pRet->initWithFile(pszFileName)){pRet->autorelease();}else{CC_SAFE_DELETE(pRet);}return pRet;
}void SpriteBlur::listenBackToForeground(CCObject *obj)
{setShaderProgram(NULL);initProgram();
}bool SpriteBlur::initWithTexture(CCTexture2D* texture, const CCRect& rect)
{if( CCSprite::initWithTexture(texture, rect) ) {CCNotificationCenter::sharedNotificationCenter()->addObserver(this,callfuncO_selector(SpriteBlur::listenBackToForeground),EVENT_COME_TO_FOREGROUND,NULL);CCSize s = getTexture()->getContentSizeInPixels();blur_ = ccp(1/s.width, 1/s.height);sub_[0] = sub_[1] = sub_[2] = sub_[3] = 0;this->initProgram();return true;}return false;
}void SpriteBlur::initProgram()
{GLchar * fragSource = (GLchar*) CCString::createWithContentsOfFile(CCFileUtils::sharedFileUtils()->fullPathForFilename("Shaders/example_Blur.fsh").c_str())->getCString();CCGLProgram* pProgram = new CCGLProgram();pProgram->initWithVertexShaderByteArray(ccPositionTextureColor_vert, fragSource);setShaderProgram(pProgram);pProgram->release();CHECK_GL_ERROR_DEBUG();getShaderProgram()->addAttribute(kCCAttributeNamePosition, kCCVertexAttrib_Position);getShaderProgram()->addAttribute(kCCAttributeNameColor, kCCVertexAttrib_Color);getShaderProgram()->addAttribute(kCCAttributeNameTexCoord, kCCVertexAttrib_TexCoords);CHECK_GL_ERROR_DEBUG();getShaderProgram()->link();CHECK_GL_ERROR_DEBUG();getShaderProgram()->updateUniforms();CHECK_GL_ERROR_DEBUG();subLocation = glGetUniformLocation( getShaderProgram()->getProgram(), "substract");blurLocation = glGetUniformLocation( getShaderProgram()->getProgram(), "blurSize");CHECK_GL_ERROR_DEBUG();
}void SpriteBlur::draw()
{ccGLEnableVertexAttribs(kCCVertexAttribFlag_PosColorTex );ccBlendFunc blend = getBlendFunc();ccGLBlendFunc(blend.src, blend.dst);getShaderProgram()->use();getShaderProgram()->setUniformsForBuiltins();getShaderProgram()->setUniformLocationWith2f(blurLocation, blur_.x, blur_.y);getShaderProgram()->setUniformLocationWith4fv(subLocation, sub_, 1);ccGLBindTexture2D( getTexture()->getName());//// Attributes//
#define kQuadSize sizeof(m_sQuad.bl)long offset = (long)&m_sQuad;// vertexint diff = offsetof( ccV3F_C4B_T2F, vertices);glVertexAttribPointer(kCCVertexAttrib_Position, 3, GL_FLOAT, GL_FALSE, kQuadSize, (void*) (offset + diff));// texCoodsdiff = offsetof( ccV3F_C4B_T2F, texCoords);glVertexAttribPointer(kCCVertexAttrib_TexCoords, 2, GL_FLOAT, GL_FALSE, kQuadSize, (void*)(offset + diff));// colordiff = offsetof( ccV3F_C4B_T2F, colors);glVertexAttribPointer(kCCVertexAttrib_Color, 4, GL_UNSIGNED_BYTE, GL_TRUE, kQuadSize, (void*)(offset + diff));glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);CC_INCREMENT_GL_DRAWS(1);
}void SpriteBlur::setBlurSize(float f)
{CCSize s = getTexture()->getContentSizeInPixels();blur_ = ccp(1/s.width, 1/s.height);blur_ = ccpMult(blur_,f);
}

好了，直接copy到你的program里面，不过有一点需要注意，就是他这个只能用一个文件(图片)create，如果需要用一个Texture初始化(因为有时候需要模糊即时的sprite)，可以稍微改装一下，加一个函数：

static SpriteBlur* createWithTexture(CCTexture2D *pTexture);

实现：

SpriteBlur* SpriteBlur::createWithTexture(CCTexture2D *pTexture)
{CCAssert(pTexture != NULL, "Invalid texture for sprite");CCRect rect = CCRectZero;rect.size = pTexture->getContentSize();SpriteBlur* pRet = new SpriteBlur();if (pRet && pRet->initWithTexture(pTexture,rect)){pRet->autorelease();}else{CC_SAFE_DELETE(pRet);}return pRet;
}

用法：

SpriteBlur *bluredSpr = SpriteBlur::createWithTexture(tex);
bluredSpr->setPosition(ccp(sz.width/2,sz.height/2));
bluredSpr->setBlurSize(0.9f); // 这里稍微设小一点
addChild(bluredSpr);

效果：

注意：

他需要一个fsh文件（具体看它的实现），似乎是叠texture用的，找到example_Blur.fsh放到你的Resources\Shaders目录下