axmol/cocos2dx/base_nodes/CCAtlasNode.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2011      Zynga Inc.
 
http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "CCAtlasNode.h"
#include "textures/CCTextureAtlas.h"
#include "CCDirector.h"
#include "shaders/CCGLProgram.h"
#include "shaders/CCShaderCache.h"
#include "shaders/ccGLStateCache.h"
#include "CCDirector.h"
#include "support/TransformUtils.h"

// external
#include "kazmath/GL/matrix.h"

NS_CC_BEGIN

// implementation CCAtlasNode

// CCAtlasNode - Creation & Init

CCAtlasNode::CCAtlasNode()
: m_uItemsPerRow(0)
, m_uItemsPerColumn(0)
, m_uItemWidth(0)
, m_uItemHeight(0)
, m_pTextureAtlas(NULL)
, m_bIsOpacityModifyRGB(false)
, m_cOpacity(0)
, m_uQuadsToDraw(0)
, m_nUniformColor(0)
{
}

CCAtlasNode::~CCAtlasNode()
{
    CC_SAFE_RELEASE(m_pTextureAtlas);
}

CCAtlasNode * CCAtlasNode::create(const char *tile, unsigned int tileWidth, unsigned int tileHeight, 
											 unsigned int itemsToRender)
{
	CCAtlasNode * pRet = new CCAtlasNode();
	if (pRet->initWithTileFile(tile, tileWidth, tileHeight, itemsToRender))
	{
		pRet->autorelease();
		return pRet;
	}
	CC_SAFE_DELETE(pRet);
	return NULL;
}

bool CCAtlasNode::initWithTileFile(const char *tile, unsigned int tileWidth, unsigned int tileHeight, 
                                   unsigned int itemsToRender)
{
    CCAssert(tile != NULL, "title should not be null");
    m_uItemWidth  = tileWidth;
    m_uItemHeight = tileHeight;

    m_cOpacity = 255;
    m_tColor = m_tColorUnmodified = ccWHITE;
    m_bIsOpacityModifyRGB = true;

    m_tBlendFunc.src = CC_BLEND_SRC;
    m_tBlendFunc.dst = CC_BLEND_DST;

    CCTextureAtlas* pNewAtlas= new CCTextureAtlas();
    pNewAtlas->initWithFile(tile, itemsToRender);
    setTextureAtlas(pNewAtlas);
    pNewAtlas->release();

    if (! m_pTextureAtlas)
    {
        CCLOG("cocos2d: Could not initialize CCAtlasNode. Invalid Texture.");
        return false;
    }

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

    this->calculateMaxItems();

    m_uQuadsToDraw = itemsToRender;

    // shader stuff
    setShaderProgram(CCShaderCache::sharedShaderCache()->programForKey(kCCShader_PositionTexture_uColor));
    m_nUniformColor = glGetUniformLocation( getShaderProgram()->getProgram(), "u_color");

    return true;
}


// CCAtlasNode - Atlas generation

void CCAtlasNode::calculateMaxItems()
{
    const CCSize& s = m_pTextureAtlas->getTexture()->getContentSize();
    m_uItemsPerColumn = (int)(s.height / m_uItemHeight);
    m_uItemsPerRow = (int)(s.width / m_uItemWidth);
}

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

// CCAtlasNode - draw
void CCAtlasNode::draw(void)
{
    CC_NODE_DRAW_SETUP();

    ccGLBlendFunc( m_tBlendFunc.src, m_tBlendFunc.dst );

    GLfloat colors[4] = {m_tColor.r / 255.0f, m_tColor.g / 255.0f, m_tColor.b / 255.0f, m_cOpacity / 255.0f};
    getShaderProgram()->setUniformLocationWith4fv(m_nUniformColor, colors, 1);

    m_pTextureAtlas->drawNumberOfQuads(m_uQuadsToDraw, 0);
}

// CCAtlasNode - RGBA protocol

const ccColor3B& CCAtlasNode:: getColor()
{
    if(m_bIsOpacityModifyRGB)
    {
        return m_tColorUnmodified;
    }
    return m_tColor;
}

void CCAtlasNode::setColor(const ccColor3B& color3)
{
    m_tColor = m_tColorUnmodified = color3;

    if( m_bIsOpacityModifyRGB )
    {
        m_tColor.r = color3.r * m_cOpacity/255;
        m_tColor.g = color3.g * m_cOpacity/255;
        m_tColor.b = color3.b * m_cOpacity/255;
    }    
}

GLubyte CCAtlasNode::getOpacity()
{
    return m_cOpacity;
}

void CCAtlasNode::setOpacity(GLubyte opacity)
{
    m_cOpacity = opacity;

    // special opacity for premultiplied textures
    if( m_bIsOpacityModifyRGB )
        this->setColor(m_tColorUnmodified);
}

void CCAtlasNode::setOpacityModifyRGB(bool bValue)
{
    ccColor3B oldColor    = this->m_tColor;
    m_bIsOpacityModifyRGB = bValue;
    this->m_tColor        = oldColor;
}

bool CCAtlasNode::isOpacityModifyRGB()
{
    return m_bIsOpacityModifyRGB;
}

void CCAtlasNode::updateOpacityModifyRGB()
{
    m_bIsOpacityModifyRGB = m_pTextureAtlas->getTexture()->hasPremultipliedAlpha();
}

// CCAtlasNode - CocosNodeTexture protocol

ccBlendFunc CCAtlasNode::getBlendFunc()
{
    return m_tBlendFunc;
}

void CCAtlasNode::setBlendFunc(ccBlendFunc blendFunc)
{
    m_tBlendFunc = blendFunc;
}

void CCAtlasNode::updateBlendFunc()
{
    if( ! m_pTextureAtlas->getTexture()->hasPremultipliedAlpha() ) {
        m_tBlendFunc.src = GL_SRC_ALPHA;
        m_tBlendFunc.dst = GL_ONE_MINUS_SRC_ALPHA;
    }
}

void CCAtlasNode::setTexture(CCTexture2D *texture)
{
    m_pTextureAtlas->setTexture(texture);
    this->updateBlendFunc();
    this->updateOpacityModifyRGB();
}

CCTexture2D * CCAtlasNode::getTexture()
{
    return m_pTextureAtlas->getTexture();
}

void CCAtlasNode::setTextureAtlas(CCTextureAtlas* var)
{
    CC_SAFE_RETAIN(var);
    CC_SAFE_RELEASE(m_pTextureAtlas);
    m_pTextureAtlas = var;
}

CCTextureAtlas * CCAtlasNode::getTextureAtlas()
{
    return m_pTextureAtlas;
}

unsigned int CCAtlasNode::getQuadsToDraw()
{
    return m_uQuadsToDraw;
}

void CCAtlasNode::setQuadsToDraw(unsigned int uQuadsToDraw)
{
    m_uQuadsToDraw = uQuadsToDraw;
}

NS_CC_END