India/cocos2d-x/cocos/renderer/CCGLProgramStateCache.cpp

/****************************************************************************
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

http://www.cocos2d-x.org
 
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#include "renderer/CCGLProgramStateCache.h"

#include "renderer/CCGLProgramState.h"
#include "renderer/CCGLProgram.h"


NS_CC_BEGIN

GLProgramStateCache* GLProgramStateCache::s_instance = nullptr;

GLProgramStateCache::GLProgramStateCache()
{
}

GLProgramStateCache::~GLProgramStateCache()
{
    _glProgramStates.clear();
}

GLProgramStateCache* GLProgramStateCache::getInstance()
{
    if (s_instance == nullptr)
        s_instance = new (std::nothrow) GLProgramStateCache();
    
    return s_instance;
}

void GLProgramStateCache::destroyInstance()
{
    CC_SAFE_DELETE(s_instance);
}

GLProgramState* GLProgramStateCache::getGLProgramState(GLProgram* glprogram)
{
    const auto& itr = _glProgramStates.find(glprogram);
    if (itr != _glProgramStates.end())
    {
        return itr->second;
    }
    
    auto ret = new (std::nothrow) GLProgramState;
    if(ret && ret->init(glprogram)) {
        _glProgramStates.insert(glprogram, ret);
        ret->release();
        return ret;
    }
    
    CC_SAFE_RELEASE(ret);
    return ret;
}

void GLProgramStateCache::removeUnusedGLProgramState()
{
    for( auto it=_glProgramStates.cbegin(); it!=_glProgramStates.cend(); /* nothing */) {
        auto value = it->second;
        if( value->getReferenceCount() == 1 ) {
            CCLOG("cocos2d: GLProgramStateCache: removing unused GLProgramState");

            //value->release();
            it = _glProgramStates.erase(it);
        } else {
            ++it;
        }
    }
}

void GLProgramStateCache::removeAllGLProgramState()
{
    _glProgramStates.clear();
}

NS_CC_END