void ShaderNode::loadShaderVertex(const char *vert, const char *frag)
{
GLProgram *shader = new GLProgram();
shader->initWithVertexShaderFilename(vert, frag);
shader->addAttribute("aVertex", GLProgram::VERTEX_ATTRIB_POSITION);
shader->link();
shader->updateUniforms();
_uniformCenter = glGetUniformLocation(shader->getProgram(), "center");
_uniformResolution = glGetUniformLocation(shader->getProgram(), "resolution");
_uniformTime = glGetUniformLocation(shader->getProgram(), "time");
this->setShaderProgram(shader);
shader->release();
}
// on "init" you need to initialize your instance
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !Layer::init() )
{
return false;
}
Size visibleSize = Director::getInstance()->getVisibleSize();
Point origin = Director::getInstance()->getVisibleOrigin();
/////////////////////////////
// 2. add a menu item with "X" image, which is clicked to quit the program
// you may modify it.
// add a "close" icon to exit the progress. it's an autorelease object
auto closeItem = MenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
CC_CALLBACK_1(HelloWorld::menuCloseCallback, this));
closeItem->setPosition(Point(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,
origin.y + closeItem->getContentSize().height/2));
auto menu = Menu::create(closeItem, NULL);
menu->setPosition(Point::ZERO);
this->addChild(menu, 1);
auto sprite = Sprite::create("HelloWorld.png");
sprite->setPosition(Point(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
this->addChild(sprite, 0);
auto playSp = Sprite::create("general_right.png");
playSp->setPosition(Point(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
this->addChild(playSp);
/*auto backgroundButton = Scale9Sprite::create("general_right.png");
auto titleButton = LabelTTF::create("", "Marker Felt", 30);
ControlButton *button = ControlButton::create(titleButton, backgroundButton);
button->setPosition(Point(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
button->setAdjustBackgroundImage(false);
this->addChild(button);*/
GLchar * pszFragSource =
"#ifdef GL_ES \n \
precision mediump float; \n \
#endif \n \
uniform sampler2D u_texture; \n \
varying vec2 v_texCoord; \n \
varying vec4 v_fragmentColor; \n \
void main(void) \n \
{ \n \
// Convert to greyscale using NTSC weightings \n \
float grey = dot(texture2D(u_texture, v_texCoord).rgb, vec3(0.299, 0.587, 0.114)); \n \
gl_FragColor = vec4(grey, grey, grey, 1.0); \n \
}";
GLProgram* greyShader = new GLProgram();
greyShader->initWithVertexShaderByteArray(ccPositionTextureColor_vert, pszFragSource);
greyShader->addAttribute(GLProgram::ATTRIBUTE_NAME_POSITION, GLProgram::VERTEX_ATTRIB_POSITION);
greyShader->addAttribute(GLProgram::ATTRIBUTE_NAME_COLOR, GLProgram::VERTEX_ATTRIB_COLOR);
greyShader->addAttribute(GLProgram::ATTRIBUTE_NAME_TEX_COORD, GLProgram::VERTEX_ATTRIB_TEX_COORDS);
greyShader->link();
greyShader->updateUniforms();
//backgroundButton->setShaderProgram(greyShader);
sprite->setShaderProgram(greyShader);
playSp->setShaderProgram(greyShader);
/*Array * children = button->getChildren();
for(int i = 0;i < children->count();i ++){
((Node *)children->getObjectAtIndex(i))->setShaderProgram(greyShader);
}*/
greyShader->release();
return true;
}