FontAtlas::FontAtlas(Font &theFont)
: _font(&theFont)
, _currentPageData(nullptr)
, _fontAscender(0)
, _toForegroundListener(nullptr)
, _toBackgroundListener(nullptr)
, _antialiasEnabled(true)
{
_font->retain();
FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if (fontTTf)
{
_commonLineHeight = _font->getFontMaxHeight();
_fontAscender = fontTTf->getFontAscender();
auto texture = new Texture2D;
_currentPage = 0;
_currentPageOrigX = 0;
_currentPageOrigY = 0;
_letterPadding = 0;
if(fontTTf->isDistanceFieldEnabled())
{
_letterPadding += 2 * FontFreeType::DistanceMapSpread;
}
_currentPageDataSize = CacheTextureWidth * CacheTextureHeight;
if(fontTTf->getOutlineSize() > 0)
{
_currentPageDataSize *= 2;
}
_currentPageData = new unsigned char[_currentPageDataSize];
memset(_currentPageData, 0, _currentPageDataSize);
auto pixelFormat = fontTTf->getOutlineSize() > 0 ? Texture2D::PixelFormat::AI88 : Texture2D::PixelFormat::A8;
texture->initWithData(_currentPageData, _currentPageDataSize,
pixelFormat, CacheTextureWidth, CacheTextureHeight, Size(CacheTextureWidth,CacheTextureHeight) );
addTexture(texture,0);
texture->release();
#if CC_ENABLE_CACHE_TEXTURE_DATA
auto eventDispatcher = Director::getInstance()->getEventDispatcher();
_toBackgroundListener = EventListenerCustom::create(EVENT_COME_TO_BACKGROUND, CC_CALLBACK_1(FontAtlas::listenToBackground, this));
eventDispatcher->addEventListenerWithFixedPriority(_toBackgroundListener, 1);
_toForegroundListener = EventListenerCustom::create(EVENT_COME_TO_FOREGROUND, CC_CALLBACK_1(FontAtlas::listenToForeground, this));
eventDispatcher->addEventListenerWithFixedPriority(_toForegroundListener, 1);
#endif
}
}
void FontAtlas::listenToForeground(EventCustom *event)
{
#if CC_ENABLE_CACHE_TEXTURE_DATA
FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if (fontTTf)
{
if (_currentPageOrigX == 0 && _currentPageOrigY == 0)
{
auto eventDispatcher = Director::getInstance()->getEventDispatcher();
eventDispatcher->dispatchCustomEvent(EVENT_PURGE_TEXTURES,this);
}
else
{
auto contentSize = Size(CacheTextureWidth,CacheTextureHeight);
auto pixelFormat = fontTTf->getOutlineSize() > 0 ? Texture2D::PixelFormat::AI88 : Texture2D::PixelFormat::A8;
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize, pixelFormat, CacheTextureWidth, CacheTextureHeight, contentSize );
}
}
#endif
}
bool FontAtlas::prepareLetterDefinitions(unsigned short *utf16String)
{
FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if(fontTTf == nullptr)
return false;
int length = cc_wcslen(utf16String);
float offsetAdjust = _letterPadding / 2;
int bitmapWidth;
int bitmapHeight;
Rect tempRect;
FontLetterDefinition tempDef;
auto contentSize = Size(CacheTextureWidth,CacheTextureHeight);
auto scaleFactor = CC_CONTENT_SCALE_FACTOR();
auto pixelFormat = fontTTf->getOutlineSize() > 0 ? Texture2D::PixelFormat::AI88 : Texture2D::PixelFormat::A8;
bool existNewLetter = false;
for (int i = 0; i < length; ++i)
{
auto outIterator = _fontLetterDefinitions.find(utf16String[i]);
if (outIterator == _fontLetterDefinitions.end())
{
existNewLetter = true;
auto bitmap = fontTTf->getGlyphBitmap(utf16String[i],bitmapWidth,bitmapHeight,tempRect,tempDef.xAdvance);
if (bitmap)
{
tempDef.validDefinition = true;
tempDef.letteCharUTF16 = utf16String[i];
tempDef.width = tempRect.size.width + _letterPadding;
tempDef.height = tempRect.size.height + _letterPadding;
tempDef.offsetX = tempRect.origin.x + offsetAdjust;
tempDef.offsetY = _fontAscender + tempRect.origin.y - offsetAdjust;
if (_currentPageOrigX + tempDef.width > CacheTextureWidth)
{
_currentPageOrigY += _commonLineHeight;
_currentPageOrigX = 0;
if(_currentPageOrigY + _commonLineHeight >= CacheTextureHeight)
{
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize, pixelFormat, CacheTextureWidth, CacheTextureHeight, contentSize );
_currentPageOrigY = 0;
memset(_currentPageData, 0, _currentPageDataSize);
_currentPage++;
auto tex = new Texture2D;
addTexture(tex,_currentPage);
tex->release();
}
}
fontTTf->renderCharAt(_currentPageData,_currentPageOrigX,_currentPageOrigY,bitmap,bitmapWidth,bitmapHeight);
tempDef.U = _currentPageOrigX;
tempDef.V = _currentPageOrigY;
tempDef.textureID = _currentPage;
_currentPageOrigX += tempDef.width + 1;
// take from pixels to points
tempDef.width = tempDef.width / scaleFactor;
tempDef.height = tempDef.height / scaleFactor;
tempDef.U = tempDef.U / scaleFactor;
tempDef.V = tempDef.V / scaleFactor;
}
else{
if(tempDef.xAdvance)
tempDef.validDefinition = true;
else
tempDef.validDefinition = false;
tempDef.letteCharUTF16 = utf16String[i];
tempDef.width = 0;
tempDef.height = 0;
tempDef.U = 0;
tempDef.V = 0;
tempDef.offsetX = 0;
tempDef.offsetY = 0;
tempDef.textureID = 0;
_currentPageOrigX += 1;
}
_fontLetterDefinitions[tempDef.letteCharUTF16] = tempDef;
}
}
if(existNewLetter)
{
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize, pixelFormat, CacheTextureWidth, CacheTextureHeight, contentSize );
}
return true;
}
bool FontAtlas::prepareLetterDefinitions(const std::u16string& utf16String)
{
FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if(fontTTf == nullptr)
return false;
size_t length = utf16String.length();
float offsetAdjust = _letterPadding / 2;
long bitmapWidth;
long bitmapHeight;
Rect tempRect;
FontLetterDefinition tempDef;
auto scaleFactor = CC_CONTENT_SCALE_FACTOR();
auto pixelFormat = fontTTf->getOutlineSize() > 0 ? Texture2D::PixelFormat::AI88 : Texture2D::PixelFormat::A8;
bool existNewLetter = false;
int bottomHeight = _commonLineHeight - _fontAscender;
float startY = _currentPageOrigY;
for (size_t i = 0; i < length; ++i)
{
auto outIterator = _fontLetterDefinitions.find(utf16String[i]);
if (outIterator == _fontLetterDefinitions.end())
{
existNewLetter = true;
auto bitmap = fontTTf->getGlyphBitmap(utf16String[i],bitmapWidth,bitmapHeight,tempRect,tempDef.xAdvance);
if (bitmap)
{
tempDef.validDefinition = true;
tempDef.letteCharUTF16 = utf16String[i];
tempDef.width = tempRect.size.width + _letterPadding;
tempDef.height = tempRect.size.height + _letterPadding;
tempDef.offsetX = tempRect.origin.x + offsetAdjust;
tempDef.offsetY = _fontAscender + tempRect.origin.y - offsetAdjust;
tempDef.clipBottom = bottomHeight - (tempDef.height + tempRect.origin.y + offsetAdjust);
if (_currentPageOrigX + tempDef.width > CacheTextureWidth)
{
_currentPageOrigY += _commonLineHeight;
_currentPageOrigX = 0;
if(_currentPageOrigY + _commonLineHeight >= CacheTextureHeight)
{
unsigned char *data = nullptr;
if(pixelFormat == Texture2D::PixelFormat::AI88)
{
data = _currentPageData + CacheTextureWidth * (int)startY * 2;
}
else
{
data = _currentPageData + CacheTextureWidth * (int)startY;
}
_atlasTextures[_currentPage]->updateWithData(data, 0, startY,
CacheTextureWidth, CacheTextureHeight - startY);
startY = 0.0f;
_currentPageOrigY = 0;
memset(_currentPageData, 0, _currentPageDataSize);
_currentPage++;
auto tex = new (std::nothrow) Texture2D;
if (_antialiasEnabled)
{
tex->setAntiAliasTexParameters();
}
else
{
tex->setAliasTexParameters();
}
tex->initWithData(_currentPageData, _currentPageDataSize,
pixelFormat, CacheTextureWidth, CacheTextureHeight, Size(CacheTextureWidth,CacheTextureHeight) );
addTexture(tex,_currentPage);
tex->release();
}
}
fontTTf->renderCharAt(_currentPageData,_currentPageOrigX,_currentPageOrigY,bitmap,bitmapWidth,bitmapHeight);
tempDef.U = _currentPageOrigX;
tempDef.V = _currentPageOrigY;
tempDef.textureID = _currentPage;
_currentPageOrigX += tempDef.width + 1;
// take from pixels to points
tempDef.width = tempDef.width / scaleFactor;
tempDef.height = tempDef.height / scaleFactor;
tempDef.U = tempDef.U / scaleFactor;
tempDef.V = tempDef.V / scaleFactor;
}
else{
if(tempDef.xAdvance)
tempDef.validDefinition = true;
else
tempDef.validDefinition = false;
tempDef.letteCharUTF16 = utf16String[i];
tempDef.width = 0;
tempDef.height = 0;
tempDef.U = 0;
tempDef.V = 0;
tempDef.offsetX = 0;
tempDef.offsetY = 0;
tempDef.textureID = 0;
tempDef.clipBottom = 0;
_currentPageOrigX += 1;
}
_fontLetterDefinitions[tempDef.letteCharUTF16] = tempDef;
}
}
if(existNewLetter)
{
if (_rendererRecreate)
{
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize,
pixelFormat, CacheTextureWidth, CacheTextureHeight, Size(CacheTextureWidth,CacheTextureHeight) );
}
else
{
unsigned char *data = nullptr;
if(pixelFormat == Texture2D::PixelFormat::AI88)
{
data = _currentPageData + CacheTextureWidth * (int)startY * 2;
}
else
{
data = _currentPageData + CacheTextureWidth * (int)startY;
}
_atlasTextures[_currentPage]->updateWithData(data, 0, startY,
CacheTextureWidth, _currentPageOrigY - startY + _commonLineHeight);
}
}
return true;
}