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axmol/cocos/2d/CCFontAtlas.cpp

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/****************************************************************************
Copyright (c) 2013 Zynga Inc.
Copyright (c) 2013-2014 Chukong Technologies Inc.
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
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "CCFontAtlas.h"
#include "CCFontFreeType.h"
#include "ccUTF8.h"
#include "CCDirector.h"
#include "CCEventListenerCustom.h"
#include "CCEventDispatcher.h"
#include "CCEventType.h"
NS_CC_BEGIN
const int FontAtlas::CacheTextureWidth = 1024;
const int FontAtlas::CacheTextureHeight = 1024;
const char* FontAtlas::EVENT_PURGE_TEXTURES = "__cc_FontAtlasPurgeTextures";
FontAtlas::FontAtlas(Font &theFont)
: _font(&theFont)
, _currentPageData(nullptr)
, _fontAscender(0)
, _toForegroundListener(nullptr)
, _toBackgroundListener(nullptr)
{
_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);
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
}
}
FontAtlas::~FontAtlas()
{
#if CC_ENABLE_CACHE_TEXTURE_DATA
FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if (fontTTf)
{
auto eventDispatcher = Director::getInstance()->getEventDispatcher();
if (_toForegroundListener)
{
eventDispatcher->removeEventListener(_toForegroundListener);
_toForegroundListener = nullptr;
}
if (_toBackgroundListener)
{
eventDispatcher->removeEventListener(_toBackgroundListener);
_toBackgroundListener = nullptr;
}
}
#endif
_font->release();
relaseTextures();
delete []_currentPageData;
}
void FontAtlas::relaseTextures()
{
for( auto &item: _atlasTextures)
{
item.second->release();
}
_atlasTextures.clear();
}
void FontAtlas::purgeTexturesAtlas()
{
FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if (fontTTf && _atlasTextures.size() > 1)
{
for( auto &item: _atlasTextures)
{
if (item.first != 0)
{
item.second->release();
}
}
auto temp = _atlasTextures[0];
_atlasTextures.clear();
_atlasTextures[0] = temp;
_fontLetterDefinitions.clear();
memset(_currentPageData,0,_currentPageDataSize);
_currentPage = 0;
_currentPageOrigX = 0;
_currentPageOrigY = 0;
auto eventDispatcher = Director::getInstance()->getEventDispatcher();
eventDispatcher->dispatchCustomEvent(EVENT_PURGE_TEXTURES,this);
}
}
void FontAtlas::listenToBackground(EventCustom *event)
{
#if CC_ENABLE_CACHE_TEXTURE_DATA
FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if (fontTTf && _atlasTextures.size() > 1)
{
for( auto &item: _atlasTextures)
{
if (item.first != 0)
{
item.second->release();
}
}
auto temp = _atlasTextures[0];
_atlasTextures.clear();
_atlasTextures[0] = temp;
_fontLetterDefinitions.clear();
memset(_currentPageData,0,_currentPageDataSize);
_currentPage = 0;
_currentPageOrigX = 0;
_currentPageOrigY = 0;
}
#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;
// this is a memory leak as the texture previously in _atlasTextures[_currentPage] is not deleted from OpenGL
// see CCTexture2D::initWithData for the temporary fix
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize, pixelFormat, CacheTextureWidth, CacheTextureHeight, contentSize );
}
}
#endif
}
void FontAtlas::addLetterDefinition(const FontLetterDefinition &letterDefinition)
{
_fontLetterDefinitions[letterDefinition.letteCharUTF16] = letterDefinition;
}
bool FontAtlas::getLetterDefinitionForChar(unsigned short letteCharUTF16, FontLetterDefinition &outDefinition)
{
auto outIterator = _fontLetterDefinitions.find(letteCharUTF16);
if (outIterator != _fontLetterDefinitions.end())
{
outDefinition = (*outIterator).second;
return true;
}
else
{
outDefinition.validDefinition = false;
return false;
}
}
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;
long bitmapWidth;
long 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;
int bottomHeight = _commonLineHeight - _fontAscender;
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;
tempDef.clipBottom = bottomHeight - (tempDef.height + tempRect.origin.y + offsetAdjust);
if (_currentPageOrigX + tempDef.width > CacheTextureWidth)
{
_currentPageOrigY += _commonLineHeight;
_currentPageOrigX = 0;
if(_currentPageOrigY + _commonLineHeight >= CacheTextureHeight)
{
// this is a memory leak as the texture previously in _atlasTextures[_currentPage] is not deleted from OpenGL
// see CCTexture2D::initWithData for the temporary fix
_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;
tempDef.clipBottom = 0;
_currentPageOrigX += 1;
}
_fontLetterDefinitions[tempDef.letteCharUTF16] = tempDef;
}
}
if(existNewLetter)
{
// this is a memory leak as the texture previously in _atlasTextures[_currentPage] is not deleted from OpenGL
// see CCTexture2D::initWithData for the temporary fix
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize, pixelFormat, CacheTextureWidth, CacheTextureHeight, contentSize );
}
return true;
}
void FontAtlas::addTexture(Texture2D *texture, int slot)
{
texture->retain();
_atlasTextures[slot] = texture;
}
Texture2D* FontAtlas::getTexture(int slot)
{
return _atlasTextures[slot];
}
float FontAtlas::getCommonLineHeight() const
{
return _commonLineHeight;
}
void FontAtlas::setCommonLineHeight(float newHeight)
{
_commonLineHeight = newHeight;
}
const Font * FontAtlas::getFont() const
{
return _font;
}
NS_CC_END
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