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.
****************************************************************************/
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#include "CCFontAtlas.h"
#include "CCFontFreeType.h"
#include "ccUTF8.h"
#include "CCDirector.h"
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#define PAGE_WIDTH 1024
#define PAGE_HEIGHT 1024
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NS_CC_BEGIN
FontAtlas::FontAtlas(Font &theFont) :
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_font(&theFont),
_currentPageData(nullptr)
{
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_font->retain();
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FontFreeType* fontTTf = dynamic_cast<FontFreeType*>(_font);
if (fontTTf)
{
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_currentPageLineHeight = _font->getFontMaxHeight();
_commonLineHeight = _currentPageLineHeight * 0.8f;
Texture2D * tex = new Texture2D;
_currentPage = 0;
_currentPageOrigX = 0;
_currentPageOrigY = 0;
_letterPadding = 5;
_makeDistanceMap = fontTTf->isDistanceFieldEnabled();
if(_makeDistanceMap)
{
_commonLineHeight += 2 * FontFreeType::DistanceMapSpread;
_letterPadding += 2 * FontFreeType::DistanceMapSpread;
}
_currentPageDataSize = (PAGE_WIDTH * PAGE_HEIGHT * 1);
_currentPageData = new unsigned char[_currentPageDataSize];
memset(_currentPageData, 0, _currentPageDataSize);
addTexture(*tex,0);
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tex->release();
}
else
{
_makeDistanceMap = false;
}
}
FontAtlas::~FontAtlas()
{
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_font->release();
relaseTextures();
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delete []_currentPageData;
}
void FontAtlas::relaseTextures()
{
for( auto &item: _atlasTextures)
{
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item.second->release();
}
}
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void FontAtlas::addLetterDefinition(const FontLetterDefinition &letterDefinition)
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{
_fontLetterDefinitions[letterDefinition.letteCharUTF16] = letterDefinition;
}
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bool FontAtlas::getLetterDefinitionForChar(unsigned short letteCharUTF16, FontLetterDefinition &outDefinition)
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{
auto outIterator = _fontLetterDefinitions.find(letteCharUTF16);
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if (outIterator != _fontLetterDefinitions.end())
{
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outDefinition = (*outIterator).second;
return true;
}
else
{
outDefinition.validDefinition = false;
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return false;
}
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}
bool FontAtlas::prepareLetterDefinitions(unsigned short *utf16String)
{
if(_currentPageData == nullptr)
return false;
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FontFreeType* fontTTf = (FontFreeType*)_font;
std::unordered_map<unsigned short, FontLetterDefinition> fontDefs;
int length = cc_wcslen(utf16String);
//find out new letter
for (int i = 0; i < length; ++i)
{
auto outIterator = _fontLetterDefinitions.find(utf16String[i]);
if (outIterator == _fontLetterDefinitions.end())
{
auto outIterator2 = fontDefs.find(utf16String[i]);
if(outIterator2 != fontDefs.end())
continue;
Rect tempRect;
FontLetterDefinition tempDef;
tempDef.anchorX = 0.0f;
tempDef.anchorY = 1.0f;
if (!fontTTf->getBBOXFotChar(utf16String[i], tempRect,tempDef.xAdvance))
{
tempDef.validDefinition = false;
tempDef.letteCharUTF16 = utf16String[i];
tempDef.commonLineHeight = 0;
tempDef.width = 0;
tempDef.height = 0;
tempDef.U = 0;
tempDef.V = 0;
tempDef.offsetX = 0;
tempDef.offsetY = 0;
tempDef.textureID = 0;
tempDef.xAdvance = 0;
}
else
{
tempDef.validDefinition = true;
tempDef.letteCharUTF16 = utf16String[i];
tempDef.width = tempRect.size.width + _letterPadding;
tempDef.height = _currentPageLineHeight - 1;
tempDef.offsetX = tempRect.origin.x;
tempDef.offsetY = tempRect.origin.y;
tempDef.commonLineHeight = _currentPageLineHeight;
}
fontDefs[utf16String[i]] = tempDef;
}
}
Size _pageContentSize = Size(PAGE_WIDTH,PAGE_HEIGHT);
float scaleFactor = CC_CONTENT_SCALE_FACTOR();
float glyphWidth;
Texture2D::PixelFormat pixelFormat = Texture2D::PixelFormat::A8;
for(auto it = fontDefs.begin(); it != fontDefs.end(); it++)
{
if(it->second.validDefinition)
{
_currentPageOrigX += _letterPadding;
glyphWidth = it->second.width - _letterPadding;
if (_currentPageOrigX + glyphWidth > PAGE_WIDTH)
{
_currentPageOrigY += _currentPageLineHeight;
_currentPageOrigX = 0;
if(_currentPageOrigY >= PAGE_HEIGHT)
{
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize, pixelFormat, PAGE_WIDTH, PAGE_HEIGHT, _pageContentSize );
_currentPageOrigY = 0;
delete []_currentPageData;
_currentPageData = new unsigned char[_currentPageDataSize];
if(_currentPageData == nullptr)
return false;
memset(_currentPageData, 0, _currentPageDataSize);
_currentPage++;
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Texture2D* tex = new Texture2D;
addTexture(*tex,_currentPage);
tex->release();
}
}
fontTTf->renderCharAt(it->second.letteCharUTF16,_currentPageOrigX,_currentPageOrigY,_currentPageData,PAGE_WIDTH);
it->second.U = _currentPageOrigX - 1;
it->second.V = _currentPageOrigY;
it->second.textureID = _currentPage;
// take from pixels to points
it->second.width = it->second.width / scaleFactor;
it->second.height = it->second.height / scaleFactor;
it->second.U = it->second.U / scaleFactor;
it->second.V = it->second.V / scaleFactor;
}
else
glyphWidth = 0;
_fontLetterDefinitions[it->second.letteCharUTF16] = it->second;
_currentPageOrigX += glyphWidth;
}
if(fontDefs.size() > 0)
_atlasTextures[_currentPage]->initWithData(_currentPageData, _currentPageDataSize, pixelFormat, PAGE_WIDTH, PAGE_HEIGHT, _pageContentSize );
return true;
}
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void FontAtlas::addTexture(Texture2D &texture, int slot)
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{
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texture.retain();
_atlasTextures[slot] = &texture;
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}
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Texture2D & FontAtlas::getTexture(int slot)
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{
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return *(_atlasTextures[slot]);
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}
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float FontAtlas::getCommonLineHeight() const
{
return _commonLineHeight;
}
void FontAtlas::setCommonLineHeight(float newHeight)
{
if(_makeDistanceMap)
newHeight += 2 * FontFreeType::DistanceMapSpread;
_commonLineHeight = newHeight;
}
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const Font * FontAtlas::getFont() const
{
return _font;
}
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NS_CC_END