axmol/cocos/2d/CCFontDefinition.cpp

/****************************************************************************
 Copyright (c) 2013      Zynga Inc.
 
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#include "cocos2d.h"
#include "CCFontDefinition.h"

NS_CC_BEGIN

const int FontDefinitionTTF::DEFAUL_ATLAS_TEXTURE_SIZE = 1024;

FontDefinitionTTF::FontDefinitionTTF():_textImages(0), _commonLineHeight(0)
{
}

FontDefinitionTTF* FontDefinitionTTF::create(Font *font, int textureSize)
{
    if (textureSize == 0)
        textureSize = DEFAUL_ATLAS_TEXTURE_SIZE;
    
    FontDefinitionTTF *ret = new FontDefinitionTTF;
    
    if (!ret)
        return 0;
    
    const char *glyph = font->getCurrentGlyphCollection();
    if (!glyph)
        return nullptr;
    
    if (ret->initDefinition(font, glyph, textureSize))
    {
        ret->autorelease();
        return ret;
    }
    else
    {
        delete ret;
        return 0;
    }
}

FontDefinitionTTF::~FontDefinitionTTF()
{
    if (_textImages)
    {
        delete _textImages;
    }
}

bool FontDefinitionTTF::prepareLetterDefinitions(TextFontPagesDef *pageDefs)
{
    // get all the pages
    TextFontPagesDef *pages = pageDefs;
    if (!pages)
        return (false);
    
    float maxLineHeight = -1;
    
    // loops all the pages
    for (int cPages = 0; cPages < pages->getNumPages(); ++cPages)
    {
        // loops all the lines in this page
        for (int cLines = 0; cLines<pages->getPageAt(cPages)->getNumLines(); ++cLines)
        {
            float posXUV = 0.0;
            float posYUV = pages->getPageAt(cPages)->getLineAt(cLines)->getY();
            
            int   charsCounter = 0;
            
            for (int c = 0; c < pages->getPageAt(cPages)->getLineAt(cLines)->getNumGlyph(); ++c)
            {
                // the current glyph
                GlyphDef currentGlyph = pages->getPageAt(cPages)->getLineAt(cLines)->getGlyphAt(c);
                
                // letter width
                float letterWidth  = currentGlyph.getRect().size.width;
                
                // letter height
                float letterHeight = pages->getPageAt(cPages)->getLineAt(cLines)->getHeight();
                
                // add this letter definition
                FontLetterDefinition tempDef;
                
                
                // carloX little hack (this should be done outside the loop)
                if (posXUV == 0.0)
                    posXUV = currentGlyph.getPadding();
                
                tempDef.validDefinition  =    currentGlyph.isValid();
                
                if (tempDef.validDefinition)
                {
                    tempDef.letteCharUTF16   = currentGlyph.getUTF8Letter();
                    tempDef.width            = letterWidth  + currentGlyph.getPadding();
                    tempDef.height           = (letterHeight - 1);
                    tempDef.U                = (posXUV       - 1);
                    tempDef.V                = posYUV;
                    tempDef.offsetX          = currentGlyph.getRect().origin.x;
                    tempDef.offsetY          = currentGlyph.getRect().origin.y;
                    tempDef.textureID        = cPages;
                    tempDef.commonLineHeight = currentGlyph.getCommonHeight();
                    
                    // take from pixels to points
                    tempDef.width  =    tempDef.width  / CC_CONTENT_SCALE_FACTOR();
                    tempDef.height =    tempDef.height / CC_CONTENT_SCALE_FACTOR();
                    tempDef.U      =    tempDef.U      / CC_CONTENT_SCALE_FACTOR();
                    tempDef.V      =    tempDef.V      / CC_CONTENT_SCALE_FACTOR();
                    
                    if (tempDef.commonLineHeight>maxLineHeight)
                        maxLineHeight = tempDef.commonLineHeight;
                }
                else
                {
                    tempDef.letteCharUTF16   = currentGlyph.getUTF8Letter();
                    tempDef.commonLineHeight = 0;
                    tempDef.width            = 0;
                    tempDef.height           = 0;
                    tempDef.U                = 0;
                    tempDef.V                = 0;
                    tempDef.offsetX          = 0;
                    tempDef.offsetY          = 0;
                    tempDef.textureID        = 0;
                }
                
                
                // add this definition
                addLetterDefinition(tempDef);
                
                // move bounding box to the next letter
                posXUV += letterWidth + currentGlyph.getPadding();
                
                // next char in the string
                ++charsCounter;
            }
        }
    }
    
    // store the common line height
    _commonLineHeight = maxLineHeight;
    
    //
    return true;
}

bool FontDefinitionTTF::initDefinition(cocos2d::Font *font, const char *letters, int textureSize)
{
    // preare texture/image stuff
    _textImages = new TextImage();
    if (!_textImages)
        return false;
    
    if (!_textImages->initWithString(letters, textureSize, textureSize, font, true))
    {
        delete _textImages;
        _textImages = 0;
        return false;
    }
    
    // prepare the new letter definition
    return prepareLetterDefinitions(_textImages->getPages());
}

void FontDefinitionTTF::addLetterDefinition(const FontLetterDefinition &defToAdd)
{
    if (_fontLettersDefinitionUTF16.find(defToAdd.letteCharUTF16) == _fontLettersDefinitionUTF16.end())
    {
        _fontLettersDefinitionUTF16[defToAdd.letteCharUTF16] = defToAdd;
    }
}

FontAtlas * FontDefinitionTTF::createFontAtlas()
{
    int numTextures          = 0;
    TextFontPagesDef *pages = _textImages->getPages();
    
    if (pages)
        numTextures = pages->getNumPages();
    else
        return nullptr;
    
    if (!numTextures)
        return nullptr;
    
    FontAtlas *retAtlas = new FontAtlas(*_textImages->getFont());
    
    if (!retAtlas)
        return 0;
    
    for (int c = 0; c < numTextures; ++c)
    {
        TextFontPagesDef *pPages = _textImages->getPages();
        retAtlas->addTexture(*(pPages->getPageAt(c)->getPageTexture()), c);
    }
    
    // set the common line height
    retAtlas->setCommonLineHeight(_commonLineHeight * 0.8);
    
    for( auto &item: _fontLettersDefinitionUTF16 )
    {
        if ( item.second.validDefinition )
        {
            FontLetterDefinition tempDefinition = item.second;
            tempDefinition.offsetX = 0;
            tempDefinition.anchorX = 0.0f;
            tempDefinition.anchorY = 1.0f;
            retAtlas->addLetterDefinition(tempDefinition);
        }
    }
    
    // done here
    return retAtlas;
}

NS_CC_END