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axmol/cocos/2d/CCFontAtlas.cpp

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/****************************************************************************
Copyright (c) 2013 Zynga Inc.
Copyright (c) 2013-2015 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 "2d/CCFontAtlas.h"
#if CC_TARGET_PLATFORM != CC_PLATFORM_WIN32 && CC_TARGET_PLATFORM != CC_PLATFORM_WINRT && CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID
#include <iconv.h>
#elif CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
#include "platform/android/jni/Java_org_cocos2dx_lib_Cocos2dxHelper.h"
#endif
#include "2d/CCFontFreeType.h"
#include "base/ccUTF8.h"
#include "base/CCDirector.h"
#include "base/CCEventListenerCustom.h"
#include "base/CCEventDispatcher.h"
#include "base/CCEventType.h"
NS_CC_BEGIN
const int FontAtlas::CacheTextureWidth = 512;
const int FontAtlas::CacheTextureHeight = 512;
const char* FontAtlas::CMD_PURGE_FONTATLAS = "__cc_PURGE_FONTATLAS";
const char* FontAtlas::CMD_RESET_FONTATLAS = "__cc_RESET_FONTATLAS";
FontAtlas::FontAtlas(Font &theFont)
: _font(&theFont)
, _fontFreeType(nullptr)
, _iconv(nullptr)
, _currentPageData(nullptr)
, _fontAscender(0)
, _rendererRecreatedListener(nullptr)
, _antialiasEnabled(true)
, _currLineHeight(0)
{
_font->retain();
_fontFreeType = dynamic_cast<FontFreeType*>(_font);
if (_fontFreeType)
{
_lineHeight = _font->getFontMaxHeight();
_fontAscender = _fontFreeType->getFontAscender();
auto texture = new (std::nothrow) Texture2D;
_currentPage = 0;
_currentPageOrigX = 0;
_currentPageOrigY = 0;
_letterEdgeExtend = 2;
_letterPadding = 0;
if (_fontFreeType->isDistanceFieldEnabled())
{
_letterPadding += 2 * FontFreeType::DistanceMapSpread;
}
_currentPageDataSize = CacheTextureWidth * CacheTextureHeight;
auto outlineSize = _fontFreeType->getOutlineSize();
if(outlineSize > 0)
{
_lineHeight += 2 * outlineSize;
_currentPageDataSize *= 2;
}
_currentPageData = new (std::nothrow) unsigned char[_currentPageDataSize];
memset(_currentPageData, 0, _currentPageDataSize);
auto pixelFormat = outlineSize > 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();
_rendererRecreatedListener = EventListenerCustom::create(EVENT_RENDERER_RECREATED, CC_CALLBACK_1(FontAtlas::listenRendererRecreated, this));
eventDispatcher->addEventListenerWithFixedPriority(_rendererRecreatedListener, 1);
#endif
}
}
FontAtlas::~FontAtlas()
{
#if CC_ENABLE_CACHE_TEXTURE_DATA
if (_fontFreeType && _rendererRecreatedListener)
{
auto eventDispatcher = Director::getInstance()->getEventDispatcher();
eventDispatcher->removeEventListener(_rendererRecreatedListener);
_rendererRecreatedListener = nullptr;
}
#endif
_font->release();
releaseTextures();
delete []_currentPageData;
#if CC_TARGET_PLATFORM != CC_PLATFORM_WIN32 && CC_TARGET_PLATFORM != CC_PLATFORM_WINRT && CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID
if (_iconv)
{
iconv_close(_iconv);
_iconv = nullptr;
}
#endif
}
void FontAtlas::reset()
{
releaseTextures();
_currLineHeight = 0;
_currentPage = 0;
_currentPageOrigX = 0;
_currentPageOrigY = 0;
_letterDefinitions.clear();
}
void FontAtlas::releaseTextures()
{
for( auto &item: _atlasTextures)
{
item.second->release();
}
_atlasTextures.clear();
}
void FontAtlas::purgeTexturesAtlas()
{
if (_fontFreeType)
{
reset();
auto eventDispatcher = Director::getInstance()->getEventDispatcher();
eventDispatcher->dispatchCustomEvent(CMD_PURGE_FONTATLAS,this);
eventDispatcher->dispatchCustomEvent(CMD_RESET_FONTATLAS,this);
}
}
void FontAtlas::listenRendererRecreated(EventCustom *event)
{
purgeTexturesAtlas();
}
void FontAtlas::addLetterDefinition(char16_t utf16Char, const FontLetterDefinition &letterDefinition)
{
_letterDefinitions[utf16Char] = letterDefinition;
}
void FontAtlas::scaleFontLetterDefinition(float scaleFactor)
{
for (auto&& fontDefinition : _letterDefinitions) {
auto& letterDefinition = fontDefinition.second;
letterDefinition.width *= scaleFactor;
letterDefinition.height *= scaleFactor;
letterDefinition.offsetX *= scaleFactor;
letterDefinition.offsetY *= scaleFactor;
letterDefinition.xAdvance *= scaleFactor;
}
}
bool FontAtlas::getLetterDefinitionForChar(char16_t utf16Char, FontLetterDefinition &letterDefinition)
{
auto outIterator = _letterDefinitions.find(utf16Char);
if (outIterator != _letterDefinitions.end())
{
letterDefinition = (*outIterator).second;
return letterDefinition.validDefinition;
}
else
{
return false;
}
}
void FontAtlas::conversionU16TOGB2312(const std::u16string& u16Text, std::unordered_map<unsigned short, unsigned short>& charCodeMap)
{
size_t strLen = u16Text.length();
auto gb2312StrSize = strLen * 2;
auto gb2312Text = new (std::nothrow) char[gb2312StrSize];
memset(gb2312Text, 0, gb2312StrSize);
switch (_fontFreeType->getEncoding())
{
case FT_ENCODING_GB2312:
{
#if CC_TARGET_PLATFORM == CC_PLATFORM_WIN32 || CC_TARGET_PLATFORM == CC_PLATFORM_WINRT
WideCharToMultiByte(936, NULL, (LPCWCH)u16Text.c_str(), strLen, (LPSTR)gb2312Text, gb2312StrSize, NULL, NULL);
#elif CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
conversionEncodingJNI((char*)u16Text.c_str(), gb2312StrSize, "UTF-16LE", gb2312Text, "GB2312");
#else
if (_iconv == nullptr)
{
_iconv = iconv_open("gb2312", "utf-16le");
}
if (_iconv == (iconv_t)-1)
{
CCLOG("conversion from utf16 to gb2312 not available");
}
else
{
char* pin = (char*)u16Text.c_str();
char* pout = gb2312Text;
size_t inLen = strLen * 2;
size_t outLen = gb2312StrSize;
iconv(_iconv, (char**)&pin, &inLen, &pout, &outLen);
}
#endif
}
break;
default:
CCLOG("Unsupported encoding:%d", _fontFreeType->getEncoding());
break;
}
unsigned short gb2312Code = 0;
unsigned char* dst = (unsigned char*)&gb2312Code;
unsigned short u16Code;
for (size_t index = 0, gbIndex = 0; index < strLen; ++index)
{
u16Code = u16Text[index];
if (u16Code < 256)
{
charCodeMap[u16Code] = u16Code;
gbIndex += 1;
}
else
{
dst[0] = gb2312Text[gbIndex + 1];
dst[1] = gb2312Text[gbIndex];
charCodeMap[u16Code] = gb2312Code;
gbIndex += 2;
}
}
delete[] gb2312Text;
}
void FontAtlas::findNewCharacters(const std::u16string& u16Text, std::unordered_map<unsigned short, unsigned short>& charCodeMap)
{
std::u16string newChars;
FT_Encoding charEncoding = _fontFreeType->getEncoding();
//find new characters
if (_letterDefinitions.empty())
{
// fixed #16169: new android project crash in android 5.0.2 device (Nexus 7) when use 3.12.
// While using clang compiler with gnustl_static on android, the copy assignment operator of `std::u16string`
// will affect the memory validity, it means after `newChars` is destroyed, the memory of `u16Text` holds
// will be a dead region. `u16text` represents the variable in `Label::_utf16Text`, when somewhere
// allocates memory by `malloc, realloc, new, new[]`, the generated memory address may be the same
// as `Label::_utf16Text` holds. If doing a `memset` or other memory operations, the orignal `Label::_utf16Text`
// will be in an unknown state. Meanwhile, a bunch lots of logic which depends on `Label::_utf16Text`
// will be broken.
// newChars = u16Text;
// Using `append` method is a workaround for this issue. So please be carefuly while using the assignment operator
// of `std::u16string`.
newChars.append(u16Text);
}
else
{
auto length = u16Text.length();
newChars.reserve(length);
for (size_t i = 0; i < length; ++i)
{
auto outIterator = _letterDefinitions.find(u16Text[i]);
if (outIterator == _letterDefinitions.end())
{
newChars.push_back(u16Text[i]);
}
}
}
if (!newChars.empty())
{
switch (charEncoding)
{
case FT_ENCODING_UNICODE:
{
for (auto u16Code : newChars)
{
charCodeMap[u16Code] = u16Code;
}
break;
}
case FT_ENCODING_GB2312:
{
conversionU16TOGB2312(newChars, charCodeMap);
break;
}
default:
CCLOG("FontAtlas::findNewCharacters: Unsupported encoding:%d", charEncoding);
break;
}
}
}
bool FontAtlas::prepareLetterDefinitions(const std::u16string& utf16Text)
{
if (_fontFreeType == nullptr)
{
return false;
}
std::unordered_map<unsigned short, unsigned short> codeMapOfNewChar;
findNewCharacters(utf16Text, codeMapOfNewChar);
if (codeMapOfNewChar.empty())
{
return false;
}
int adjustForDistanceMap = _letterPadding / 2;
int adjustForExtend = _letterEdgeExtend / 2;
long bitmapWidth;
long bitmapHeight;
int glyphHeight;
Rect tempRect;
FontLetterDefinition tempDef;
auto scaleFactor = CC_CONTENT_SCALE_FACTOR();
auto pixelFormat = _fontFreeType->getOutlineSize() > 0 ? Texture2D::PixelFormat::AI88 : Texture2D::PixelFormat::A8;
float startY = _currentPageOrigY;
for (auto&& it : codeMapOfNewChar)
{
auto bitmap = _fontFreeType->getGlyphBitmap(it.second, bitmapWidth, bitmapHeight, tempRect, tempDef.xAdvance);
if (bitmap && bitmapWidth > 0 && bitmapHeight > 0)
{
tempDef.validDefinition = true;
tempDef.width = tempRect.size.width + _letterPadding + _letterEdgeExtend;
tempDef.height = tempRect.size.height + _letterPadding + _letterEdgeExtend;
tempDef.offsetX = tempRect.origin.x + adjustForDistanceMap + adjustForExtend;
tempDef.offsetY = _fontAscender + tempRect.origin.y - adjustForDistanceMap - adjustForExtend;
if (_currentPageOrigX + tempDef.width > CacheTextureWidth)
{
_currentPageOrigY += _currLineHeight;
_currLineHeight = 0;
_currentPageOrigX = 0;
if (_currentPageOrigY + _lineHeight + _letterPadding + _letterEdgeExtend >= 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();
}
}
glyphHeight = static_cast<int>(bitmapHeight) + _letterPadding + _letterEdgeExtend;
if (glyphHeight > _currLineHeight)
{
_currLineHeight = glyphHeight;
}
_fontFreeType->renderCharAt(_currentPageData, _currentPageOrigX + adjustForExtend, _currentPageOrigY + adjustForExtend, 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.width = 0;
tempDef.height = 0;
tempDef.U = 0;
tempDef.V = 0;
tempDef.offsetX = 0;
tempDef.offsetY = 0;
tempDef.textureID = 0;
_currentPageOrigX += 1;
}
_letterDefinitions[it.first] = tempDef;
}
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 + _currLineHeight);
return true;
}
void FontAtlas::addTexture(Texture2D *texture, int slot)
{
texture->retain();
_atlasTextures[slot] = texture;
}
Texture2D* FontAtlas::getTexture(int slot)
{
return _atlasTextures[slot];
}
void FontAtlas::setLineHeight(float newHeight)
{
_lineHeight = newHeight;
}
void FontAtlas::setAliasTexParameters()
{
if (_antialiasEnabled)
{
_antialiasEnabled = false;
for (const auto & tex : _atlasTextures)
{
tex.second->setAliasTexParameters();
}
}
}
void FontAtlas::setAntiAliasTexParameters()
{
if (! _antialiasEnabled)
{
_antialiasEnabled = true;
for (const auto & tex : _atlasTextures)
{
tex.second->setAntiAliasTexParameters();
}
}
}
NS_CC_END
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