GLProgram* TextureBlur::getBlurShader(Vec2 pixelSize, Vec2 direction, const int radius, float* weights)
{
std::string blurShaderPath = FileUtils::getInstance()->fullPathForFilename("Shaders/TextureBlur.fsh");
const GLchar* blur_frag = String::createWithContentsOfFile(blurShaderPath.c_str())->getCString();
GLProgram* blur = GLProgram::createWithByteArrays(ccPositionTextureColor_vert, blur_frag);
GLProgramState* state = GLProgramState::getOrCreateWithGLProgram(blur);
state->setUniformVec2("pixelSize", pixelSize);
state->setUniformVec2("direction", direction);
state->setUniformInt("radius", radius);
state->setUniformFloatv("weights", radius, weights);
return blur;
}
// 全屏实时模糊，上真机效率很差，iPad mini1只能15帧左右。本例仅为演示用法
void P001::testShader()
{
// --- Blur
m_render = RenderTexture::create(m_visibleSize.width, m_visibleSize.height);
m_render->setPosition(SCREEN_CENTER);
m_render->clear(0, 0, 0, 0);
m_render->getSprite()->setGLProgram(WJSpriteShaderBlurQuick::getShader());
GLProgramState* glState = m_render->getSprite()->getGLProgramState();
Size size = m_render->getSprite()->getTexture()->getContentSizeInPixels();
size.width = 1.0f / size.width;
size.height = 1.0f / size.height;
glState->setUniformVec2("resolution", size);
m_render->getSprite()->getTexture()->setAntiAliasTexParameters();
this->addChild(m_render, m_sceneJson->getLocalZOrder());
BlendFunc bf = {GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA};
m_render->getSprite()->setBlendFunc(bf);
m_render->getSprite()->runAction(RepeatForever::create(
Sequence::create(
DelayTime::create(2.0f),
FadeOut::create(1.0f),
DelayTime::create(1.0f),
FadeIn::create(1.0f),
NULL)));
//m_sceneJson->setVisible(false);
// --- Gray
WJButton* btnStart = m_sceneJson->getSubButtonByKey("start");
//btnStart->setGLProgram(WJSpriteShaderGray::getShader()); // 因为现在WJButton支持九宫格功能，对它设置Shader会无效
btnStart->runAction(RepeatForever::create(
Sequence::create(
DelayTime::create(2.0f),
CallFunc::create([=]()
{
btnStart->setGrayEnabled(true);
}),
DelayTime::create(2.0f),
CallFunc::create([=]()
{
btnStart->setGrayEnabled(false);
}),
NULL)));
}