India/cocos2d-x/cocos/2d/CCAtlasNode.cpp

/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
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 "2d/CCAtlasNode.h"
#include "renderer/CCTextureAtlas.h"
#include "base/CCDirector.h"
#include "renderer/CCTextureCache.h"
#include "renderer/CCRenderer.h"
#include "renderer/CCGLProgram.h"

NS_CC_BEGIN

// implementation AtlasNode

// AtlasNode - Creation & Init

AtlasNode::AtlasNode()
: _itemsPerRow(0)
, _itemsPerColumn(0)
, _itemWidth(0)
, _itemHeight(0)
, _textureAtlas(nullptr)
, _isOpacityModifyRGB(false)
, _quadsToDraw(0)
, _uniformColor(0)
, _ignoreContentScaleFactor(false)
{
}

AtlasNode::~AtlasNode()
{
    CC_SAFE_RELEASE(_textureAtlas);
}

AtlasNode * AtlasNode::create(const std::string& tile, int tileWidth, int tileHeight, int itemsToRender)
{
    AtlasNode * ret = new (std::nothrow) AtlasNode();
    if (ret->initWithTileFile(tile, tileWidth, tileHeight, itemsToRender))
    {
        ret->autorelease();
        return ret;
    }
    CC_SAFE_DELETE(ret);
    return nullptr;
}

bool AtlasNode::initWithTileFile(const std::string& tile, int tileWidth, int tileHeight, int itemsToRender)
{
    CCASSERT(tile.size() > 0, "file size should not be empty");
    Texture2D *texture = Director::getInstance()->getTextureCache()->addImage(tile);
    return initWithTexture(texture, tileWidth, tileHeight, itemsToRender);
}

bool AtlasNode::initWithTexture(Texture2D* texture, int tileWidth, int tileHeight, int itemsToRender)
{
    _itemWidth  = tileWidth;
    _itemHeight = tileHeight;

    _colorUnmodified = Color3B::WHITE;
    _isOpacityModifyRGB = true;

    _blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;

    _textureAtlas = new (std::nothrow) TextureAtlas();

    if (! _textureAtlas)
    {
        CCLOG("cocos2d: Could not initialize AtlasNode. Invalid Texture.");
        return false;
    }
    
    _textureAtlas->initWithTexture(texture, itemsToRender);

    this->updateBlendFunc();
    this->updateOpacityModifyRGB();

    this->calculateMaxItems();

    _quadsToDraw = itemsToRender;

    // shader stuff
    setGLProgramState(GLProgramState::getOrCreateWithGLProgramName(GLProgram::SHADER_NAME_POSITION_TEXTURE_COLOR_NO_MVP, texture));

    return true;
}


// AtlasNode - Atlas generation

void AtlasNode::calculateMaxItems()
{
    Size s = _textureAtlas->getTexture()->getContentSize();
    
    if (_ignoreContentScaleFactor)
    {
        s = _textureAtlas->getTexture()->getContentSizeInPixels();
    }
    
    _itemsPerColumn = (int)(s.height / _itemHeight);
    _itemsPerRow = (int)(s.width / _itemWidth);
}

void AtlasNode::updateAtlasValues()
{
    CCASSERT(false, "CCAtlasNode:Abstract updateAtlasValue not overridden");
}

// AtlasNode - draw
void AtlasNode::draw(Renderer *renderer, const Mat4 &transform, uint32_t flags)
{
    // ETC1 ALPHA supports.
    _quadCommand.init(_globalZOrder, _textureAtlas->getTexture(), getGLProgramState(), _blendFunc, _textureAtlas->getQuads(), _quadsToDraw, transform, flags);
    
    renderer->addCommand(&_quadCommand);

}

// AtlasNode - RGBA protocol

const Color3B& AtlasNode::getColor() const
{
    if(_isOpacityModifyRGB)
    {
        return _colorUnmodified;
    }
    return Node::getColor();
}

void AtlasNode::setColor(const Color3B& color3)
{
    Color3B tmp = color3;
    _colorUnmodified = color3;

    if( _isOpacityModifyRGB )
    {
        tmp.r = tmp.r * _displayedOpacity/255;
        tmp.g = tmp.g * _displayedOpacity/255;
        tmp.b = tmp.b * _displayedOpacity/255;
    }
    Node::setColor(tmp);
}

void AtlasNode::setOpacity(GLubyte opacity)
{
    Node::setOpacity(opacity);

    // special opacity for premultiplied textures
    if( _isOpacityModifyRGB )
        this->setColor(_colorUnmodified);
}

void AtlasNode::setOpacityModifyRGB(bool value)
{
    Color3B oldColor = this->getColor();
    _isOpacityModifyRGB = value;
    this->setColor(oldColor);
}

bool AtlasNode::isOpacityModifyRGB() const
{
    return _isOpacityModifyRGB;
}

void AtlasNode::updateOpacityModifyRGB()
{
    _isOpacityModifyRGB = _textureAtlas->getTexture()->hasPremultipliedAlpha();
}

void AtlasNode::setIgnoreContentScaleFactor(bool ignoreContentScaleFactor)
{
    _ignoreContentScaleFactor = ignoreContentScaleFactor;
}

// AtlasNode - CocosNodeTexture protocol

const BlendFunc& AtlasNode::getBlendFunc() const
{
    return _blendFunc;
}

void AtlasNode::setBlendFunc(const BlendFunc &blendFunc)
{
    _blendFunc = blendFunc;
}

void AtlasNode::updateBlendFunc()
{
    if( ! _textureAtlas->getTexture()->hasPremultipliedAlpha() )
    {
        _blendFunc = BlendFunc::ALPHA_NON_PREMULTIPLIED;
        setOpacityModifyRGB(false);
    }
    else
    {
        _blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;
        setOpacityModifyRGB(true);
    }
}

void AtlasNode::setTexture(Texture2D *texture)
{
    _textureAtlas->setTexture(texture);
    this->updateBlendFunc();
    this->updateOpacityModifyRGB();
}

Texture2D * AtlasNode::getTexture() const
{
    return _textureAtlas->getTexture();
}

void AtlasNode::setTextureAtlas(TextureAtlas* textureAtlas)
{
    CC_SAFE_RETAIN(textureAtlas);
    CC_SAFE_RELEASE(_textureAtlas);
    _textureAtlas = textureAtlas;
}

TextureAtlas * AtlasNode::getTextureAtlas() const
{
    return _textureAtlas;
}

ssize_t AtlasNode::getQuadsToDraw() const
{
    return _quadsToDraw;
}

void AtlasNode::setQuadsToDraw(ssize_t quadsToDraw)
{
    _quadsToDraw = quadsToDraw;
}

NS_CC_END