axmol/cocos2dx/label_nodes/CCLabelTTF.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2008-2010 Ricardo Quesada

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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The above copyright notice and this permission notice shall be included in
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 "CCLabelTTF.h"
#include "CCDirector.h"
#include "shaders/CCGLProgram.h"
#include "shaders/CCShaderCache.h"
#include "CCApplication.h"

NS_CC_BEGIN

#if CC_USE_LA88_LABELS
#define SHADER_PROGRAM GLProgram::SHADER_NAME_POSITION_TEXTURE_COLOR
#else
#define SHADER_PROGRAM GLProgram::SHADER_NAME_POSITION_TEXTUREA8Color
#endif

//
//CCLabelTTF
//
LabelTTF::LabelTTF()
: _alignment(TextHAlignment::CENTER)
, _vAlignment(TextVAlignment::TOP)
, _fontName(NULL)
, _fontSize(0.0)
, _string("")
, _shadowEnabled(false)
, _strokeEnabled(false)
, _textFillColor(Color3B::WHITE)
{
}

LabelTTF::~LabelTTF()
{
    CC_SAFE_DELETE(_fontName);
}

LabelTTF * LabelTTF::create()
{
    LabelTTF * pRet = new LabelTTF();
    if (pRet && pRet->init())
    {
        pRet->autorelease();
    }
    else
    {
        CC_SAFE_DELETE(pRet);
    }
    return pRet;
}

LabelTTF * LabelTTF::create(const char *string, const char *fontName, float fontSize)
{
    return LabelTTF::create(string, fontName, fontSize,
                              Size::ZERO, TextHAlignment::CENTER, TextVAlignment::TOP);
}

LabelTTF * LabelTTF::create(const char *string, const char *fontName, float fontSize,
                                const Size& dimensions, TextHAlignment hAlignment)
{
    return LabelTTF::create(string, fontName, fontSize, dimensions, hAlignment, TextVAlignment::TOP);
}

LabelTTF* LabelTTF::create(const char *string, const char *fontName, float fontSize,
                               const Size &dimensions, TextHAlignment hAlignment, 
                               TextVAlignment vAlignment)
{
    LabelTTF *pRet = new LabelTTF();
    if(pRet && pRet->initWithString(string, fontName, fontSize, dimensions, hAlignment, vAlignment))
    {
        pRet->autorelease();
        return pRet;
    }
    CC_SAFE_DELETE(pRet);
    return NULL;
}

LabelTTF * LabelTTF::createWithFontDefinition(const char *string, FontDefinition &textDefinition)
{
    LabelTTF *pRet = new LabelTTF();
    if(pRet && pRet->initWithStringAndTextDefinition(string, textDefinition))
    {
        pRet->autorelease();
        return pRet;
    }
    CC_SAFE_DELETE(pRet);
    return NULL;
}

bool LabelTTF::init()
{
    return this->initWithString("", "Helvetica", 12);
}

bool LabelTTF::initWithString(const char *label, const char *fontName, float fontSize, 
                                const Size& dimensions, TextHAlignment alignment)
{
    return this->initWithString(label, fontName, fontSize, dimensions, alignment, TextVAlignment::TOP);
}

bool LabelTTF::initWithString(const char *label, const char *fontName, float fontSize)
{
    return this->initWithString(label, fontName, fontSize, 
                                Size::ZERO, TextHAlignment::LEFT, TextVAlignment::TOP);
}

bool LabelTTF::initWithString(const char *string, const char *fontName, float fontSize,
                                const cocos2d::Size &dimensions, TextHAlignment hAlignment,
                                TextVAlignment vAlignment)
{
    if (Sprite::init())
    {
        // shader program
        this->setShaderProgram(ShaderCache::getInstance()->programForKey(SHADER_PROGRAM));
        
        _dimensions = Size(dimensions.width, dimensions.height);
        _alignment  = hAlignment;
        _vAlignment  = vAlignment;
        _fontName   = new std::string(fontName);
        _fontSize   = fontSize;
        
        this->setString(string);
        
        return true;
    }
    
    return false;
}

bool LabelTTF::initWithStringAndTextDefinition(const char *string, FontDefinition &textDefinition)
{
    if (Sprite::init())
    {
        // shader program
        this->setShaderProgram(ShaderCache::getInstance()->programForKey(SHADER_PROGRAM));
        
        // prepare everythin needed to render the label
        _updateWithTextDefinition(textDefinition, false);
        
        // set the string
        this->setString(string);
        
        //
        return true;
    }
    else
    {
        return false;
    }
}


void LabelTTF::setString(const char *string)
{
    CCASSERT(string != NULL, "Invalid string");
    
    if (_string.compare(string))
    {
        _string = string;
        
        this->updateTexture();
    }
}

const char* LabelTTF::getString(void) const
{
    return _string.c_str();
}

const char* LabelTTF::description() const
{
    return String::createWithFormat("<LabelTTF | FontName = %s, FontSize = %.1f>", _fontName->c_str(), _fontSize)->getCString();
}

TextHAlignment LabelTTF::getHorizontalAlignment() const
{
    return _alignment;
}

void LabelTTF::setHorizontalAlignment(TextHAlignment alignment)
{
    if (alignment != _alignment)
    {
        _alignment = alignment;
        
        // Force update
        if (_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

TextVAlignment LabelTTF::getVerticalAlignment() const
{
    return _vAlignment;
}

void LabelTTF::setVerticalAlignment(TextVAlignment verticalAlignment)
{
    if (verticalAlignment != _vAlignment)
    {
        _vAlignment = verticalAlignment;
        
        // Force update
        if (_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

const Size& LabelTTF::getDimensions() const
{
    return _dimensions;
}

void LabelTTF::setDimensions(const Size &dim)
{
    if (dim.width != _dimensions.width || dim.height != _dimensions.height)
    {
        _dimensions = dim;
        
        // Force update
        if (_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

float LabelTTF::getFontSize() const
{
    return _fontSize;
}

void LabelTTF::setFontSize(float fontSize)
{
    if (_fontSize != fontSize)
    {
        _fontSize = fontSize;
        
        // Force update
        if (_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

const char* LabelTTF::getFontName() const
{
    return _fontName->c_str();
}

void LabelTTF::setFontName(const char *fontName)
{
    if (_fontName->compare(fontName))
    {
        delete _fontName;
        _fontName = new std::string(fontName);
        
        // Force update
        if (_string.size() > 0)
        {
            this->updateTexture();
        }
    }
}

// Helper
bool LabelTTF::updateTexture()
{
    Texture2D *tex;
    tex = new Texture2D();
    
    if (!tex)
        return false;
    
    #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) || (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    
        FontDefinition texDef = _prepareTextDefinition(true);
        tex->initWithString( _string.c_str(), texDef );
    
    #else
    
        tex->initWithString( _string.c_str(),
                            _fontName->c_str(),
                            _fontSize * CC_CONTENT_SCALE_FACTOR(),
                            CC_SIZE_POINTS_TO_PIXELS(_dimensions),
                            _alignment,
                            _vAlignment);
    
    #endif
    
    // set the texture
    this->setTexture(tex);
    // release it
    tex->release();
    
    // set the size in the sprite
    Rect rect =Rect::ZERO;
    rect.size   = _texture->getContentSize();
    this->setTextureRect(rect);
    
    //ok
    return true;
}

void LabelTTF::enableShadow(const Size &shadowOffset, float shadowOpacity, float shadowBlur, bool updateTexture)
{
    #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) || (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    
        bool valueChanged = false;
        
        if (false == _shadowEnabled)
        {
            _shadowEnabled = true;
            valueChanged    = true;
        }
        
        if ( (_shadowOffset.width != shadowOffset.width) || (_shadowOffset.height!=shadowOffset.height) )
        {
            _shadowOffset.width  = shadowOffset.width;
            _shadowOffset.height = shadowOffset.height;
            
            valueChanged = true;
        }
        
        if (_shadowOpacity != shadowOpacity )
        {
            _shadowOpacity = shadowOpacity;
            valueChanged = true;
        }

        if (_shadowBlur    != shadowBlur)
        {
            _shadowBlur = shadowBlur;
            valueChanged = true;
        }
        
        
        if ( valueChanged && updateTexture )
        {
            this->updateTexture();
        }
    
    #else
        CCLOGERROR("Currently only supported on iOS and Android!");
    #endif
    
}

void LabelTTF::disableShadow(bool updateTexture)
{
    #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) || (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    
        if (_shadowEnabled)
        {
            _shadowEnabled = false;
    
            if (updateTexture)
                this->updateTexture();
            
        }
    
    #else
        CCLOGERROR("Currently only supported on iOS and Android!");
    #endif
}

void LabelTTF::enableStroke(const Color3B &strokeColor, float strokeSize, bool updateTexture)
{
    #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) || (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    
        bool valueChanged = false;
        
        if(_strokeEnabled == false)
        {
            _strokeEnabled = true;
            valueChanged = true;
        }
        
        if ( (_strokeColor.r != strokeColor.r) || (_strokeColor.g != strokeColor.g) || (_strokeColor.b != strokeColor.b) )
        {
            _strokeColor = strokeColor;
            valueChanged = true;
        }
        
        if (_strokeSize!=strokeSize)
        {
            _strokeSize = strokeSize;
            valueChanged = true;
        }
        
        if ( valueChanged && updateTexture )
        {
            this->updateTexture();
        }
    
    #else
        CCLOGERROR("Currently only supported on iOS and Android!");
    #endif
    
}

void LabelTTF::disableStroke(bool updateTexture)
{
    #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) || (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    
        if (_strokeEnabled)
        {
            _strokeEnabled = false;
            
            if (updateTexture)
                this->updateTexture();
        }
    
    #else
        CCLOGERROR("Currently only supported on iOS and Android!");
    #endif
    
}

void LabelTTF::setFontFillColor(const Color3B &tintColor, bool updateTexture)
{
    #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID) || (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
        if (_textFillColor.r != tintColor.r || _textFillColor.g != tintColor.g || _textFillColor.b != tintColor.b)
        {
            _textFillColor = tintColor;
            
            if (updateTexture)
                this->updateTexture();
        }
    #else
        CCLOGERROR("Currently only supported on iOS and Android!");
    #endif
}

void LabelTTF::setTextDefinition(const FontDefinition& theDefinition)
{
    _updateWithTextDefinition(theDefinition, true);
}

FontDefinition LabelTTF::getTextDefinition()
{
    return _prepareTextDefinition(false);
}

void LabelTTF::_updateWithTextDefinition(const FontDefinition& textDefinition, bool mustUpdateTexture)
{
    _dimensions = Size(textDefinition._dimensions.width, textDefinition._dimensions.height);
    _alignment  = textDefinition._alignment;
    _vAlignment  = textDefinition._vertAlignment;
    
    _fontName   = new std::string(textDefinition._fontName);
    _fontSize   = textDefinition._fontSize;
    
    
    // shadow
    if ( textDefinition._shadow._shadowEnabled )
    {
        enableShadow(textDefinition._shadow._shadowOffset, textDefinition._shadow._shadowOpacity, textDefinition._shadow._shadowBlur, false);
    }
    
    // stroke
    if ( textDefinition._stroke._strokeEnabled )
    {
        enableStroke(textDefinition._stroke._strokeColor, textDefinition._stroke._strokeSize, false);
    }
    
    // fill color
    setFontFillColor(textDefinition._fontFillColor, false);
    
    if (mustUpdateTexture)
        updateTexture();
}

FontDefinition LabelTTF::_prepareTextDefinition(bool adjustForResolution)
{
    FontDefinition texDef;
    
    if (adjustForResolution)
        texDef._fontSize       =  _fontSize * CC_CONTENT_SCALE_FACTOR();
    else
        texDef._fontSize       =  _fontSize;
    
    texDef._fontName       = *_fontName;
    texDef._alignment      =  _alignment;
    texDef._vertAlignment  =  _vAlignment;
    
    
    if (adjustForResolution)
        texDef._dimensions     =  CC_SIZE_POINTS_TO_PIXELS(_dimensions);
    else
        texDef._dimensions     =  _dimensions;
    
    
    // stroke
    if ( _strokeEnabled )
    {
        texDef._stroke._strokeEnabled = true;
        texDef._stroke._strokeColor   = _strokeColor;
        
        if (adjustForResolution)
            texDef._stroke._strokeSize = _strokeSize * CC_CONTENT_SCALE_FACTOR();
        else
            texDef._stroke._strokeSize = _strokeSize;
        
        
    }
    else
    {
        texDef._stroke._strokeEnabled = false;
    }
    
    
    // shadow
    if ( _shadowEnabled )
    {
        texDef._shadow._shadowEnabled         = true;
        texDef._shadow._shadowBlur            = _shadowBlur;
        texDef._shadow._shadowOpacity         = _shadowOpacity;
        
        if (adjustForResolution)
            texDef._shadow._shadowOffset = CC_SIZE_POINTS_TO_PIXELS(_shadowOffset);
        else
            texDef._shadow._shadowOffset = _shadowOffset;
    }
    else
    {
        texDef._shadow._shadowEnabled = false;
    }
    
    // text tint
    texDef._fontFillColor = _textFillColor;
    
    return texDef;
}

NS_CC_END