cocos2d-x cancel render to texture with OpenGL CCGLProgram. cocos2d-x 取消中给 ccSprite 添加的滤镜效果。

CommUtil.cpp

void CommUtil::enableSprite(CCSprite* sp)
{
    const 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 \
    vec4 col = texture2D(u_texture, v_texCoord); \n \
    gl_FragColor = vec4(col.r, col.g, col.b, col.a); \n \
    }";
    
    CCGLProgram* pProgram = new CCGLProgram();
    pProgram->initWithVertexShaderByteArray(ccPositionTextureColor_vert, pszFragSource);
    sp->setShaderProgram(pProgram);
    pProgram->release();
    
    sp->getShaderProgram()->addAttribute(kCCAttributeNamePosition, kCCVertexAttrib_Position);
    sp->getShaderProgram()->addAttribute(kCCAttributeNameColor, kCCVertexAttrib_Color);
    sp->getShaderProgram()->addAttribute(kCCAttributeNameTexCoord, kCCVertexAttrib_TexCoords);
    
    sp->getShaderProgram()->link();
    sp->getShaderProgram()->updateUniforms();
}