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 "textures/CCTextureCache.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 AtlasNode

// AtlasNode - Creation & Init

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

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

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

bool AtlasNode::initWithTileFile(const char *tile, unsigned int tileWidth, unsigned int tileHeight, unsigned int itemsToRender)
{
    CCAssert(tile != NULL, "title should not be null");
    Texture2D *texture = TextureCache::sharedTextureCache()->addImage(tile);
	return initWithTexture(texture, tileWidth, tileHeight, itemsToRender);
}

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

    _colorUnmodified = ccWHITE;
    _isOpacityModifyRGB = true;

    _blendFunc.src = CC_BLEND_SRC;
    _blendFunc.dst = CC_BLEND_DST;

    _textureAtlas = new TextureAtlas();
    _textureAtlas->initWithTexture(texture, itemsToRender);

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

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

    this->calculateMaxItems();

    _quadsToDraw = itemsToRender;

    // shader stuff
    setShaderProgram(ShaderCache::sharedShaderCache()->programForKey(kShader_PositionTexture_uColor));
    _uniformColor = glGetUniformLocation( getShaderProgram()->getProgram(), "u_color");

    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(void)
{
    CC_NODE_DRAW_SETUP();

    ccGLBlendFunc( _blendFunc.src, _blendFunc.dst );

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

    _textureAtlas->drawNumberOfQuads(_quadsToDraw, 0);
}

// AtlasNode - RGBA protocol

const ccColor3B& AtlasNode::getColor()
{
    if(_isOpacityModifyRGB)
    {
        return _colorUnmodified;
    }
    return NodeRGBA::getColor();
}

void AtlasNode::setColor(const ccColor3B& color3)
{
    ccColor3B tmp = color3;
    _colorUnmodified = color3;

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

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

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

void AtlasNode::setOpacityModifyRGB(bool bValue)
{
    ccColor3B oldColor = this->getColor();
    _isOpacityModifyRGB = bValue;
    this->setColor(oldColor);
}

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

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

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

// AtlasNode - CocosNodeTexture protocol

ccBlendFunc AtlasNode::getBlendFunc()
{
    return _blendFunc;
}

void AtlasNode::setBlendFunc(ccBlendFunc blendFunc)
{
    _blendFunc = blendFunc;
}

void AtlasNode::updateBlendFunc()
{
    if( ! _textureAtlas->getTexture()->hasPremultipliedAlpha() ) {
        _blendFunc.src = GL_SRC_ALPHA;
        _blendFunc.dst = GL_ONE_MINUS_SRC_ALPHA;
    }
}

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

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

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

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

unsigned int AtlasNode::getQuadsToDraw()
{
    return _quadsToDraw;
}

void AtlasNode::setQuadsToDraw(unsigned int uQuadsToDraw)
{
    _quadsToDraw = uQuadsToDraw;
}

NS_CC_END