mirror of https://github.com/axmolengine/axmol.git
583 lines
18 KiB
C++
583 lines
18 KiB
C++
/****************************************************************************
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Copyright (c) 2013 Zynga Inc.
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Copyright (c) 2013-2014 Chukong Technologies Inc.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "2d/CCFontFreeType.h"
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#include "base/CCDirector.h"
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#include "base/ccUTF8.h"
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#include "platform/CCFileUtils.h"
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#include "edtaa3func.h"
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#include FT_BBOX_H
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NS_CC_BEGIN
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FT_Library FontFreeType::_FTlibrary;
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bool FontFreeType::_FTInitialized = false;
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const int FontFreeType::DistanceMapSpread = 3;
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typedef struct _DataRef
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{
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Data data;
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unsigned int referenceCount;
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}DataRef;
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static std::unordered_map<std::string, DataRef> s_cacheFontData;
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FontFreeType * FontFreeType::create(const std::string &fontName, int fontSize, GlyphCollection glyphs, const char *customGlyphs,bool distanceFieldEnabled /* = false */,int outline /* = 0 */)
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{
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FontFreeType *tempFont = new FontFreeType(distanceFieldEnabled,outline);
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if (!tempFont)
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return nullptr;
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tempFont->setCurrentGlyphCollection(glyphs, customGlyphs);
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if (!tempFont->createFontObject(fontName, fontSize))
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{
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delete tempFont;
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return nullptr;
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}
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return tempFont;
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}
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bool FontFreeType::initFreeType()
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{
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if (_FTInitialized == false)
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{
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// begin freetype
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if (FT_Init_FreeType( &_FTlibrary ))
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return false;
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_FTInitialized = true;
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}
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return _FTInitialized;
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}
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void FontFreeType::shutdownFreeType()
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{
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if (_FTInitialized == true)
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{
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FT_Done_FreeType(_FTlibrary);
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_FTInitialized = false;
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}
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}
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FT_Library FontFreeType::getFTLibrary()
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{
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initFreeType();
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return _FTlibrary;
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}
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FontFreeType::FontFreeType(bool distanceFieldEnabled /* = false */,int outline /* = 0 */)
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: _fontRef(nullptr)
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, _stroker(nullptr)
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, _distanceFieldEnabled(distanceFieldEnabled)
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, _outlineSize(0.0f)
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{
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if (outline > 0)
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{
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_outlineSize = outline * CC_CONTENT_SCALE_FACTOR();
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FT_Stroker_New(FontFreeType::getFTLibrary(), &_stroker);
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FT_Stroker_Set(_stroker,
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(int)(_outlineSize * 64),
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FT_STROKER_LINECAP_ROUND,
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FT_STROKER_LINEJOIN_ROUND,
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0);
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}
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}
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bool FontFreeType::createFontObject(const std::string &fontName, int fontSize)
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{
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FT_Face face;
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// save font name locally
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_fontName = fontName;
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auto it = s_cacheFontData.find(fontName);
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if (it != s_cacheFontData.end())
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{
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(*it).second.referenceCount += 1;
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}
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else
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{
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s_cacheFontData[fontName].referenceCount = 1;
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s_cacheFontData[fontName].data = FileUtils::getInstance()->getDataFromFile(fontName);
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if (s_cacheFontData[fontName].data.isNull())
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{
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return false;
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}
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}
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if (FT_New_Memory_Face(getFTLibrary(), s_cacheFontData[fontName].data.getBytes(), s_cacheFontData[fontName].data.getSize(), 0, &face ))
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return false;
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//we want to use unicode
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if (FT_Select_Charmap(face, FT_ENCODING_UNICODE))
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return false;
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// set the requested font size
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int dpi = 72;
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int fontSizePoints = (int)(64.f * fontSize * CC_CONTENT_SCALE_FACTOR());
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if (FT_Set_Char_Size(face, fontSizePoints, fontSizePoints, dpi, dpi))
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return false;
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// store the face globally
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_fontRef = face;
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// done and good
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return true;
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}
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FontFreeType::~FontFreeType()
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{
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if (_stroker)
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{
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FT_Stroker_Done(_stroker);
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}
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if (_fontRef)
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{
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FT_Done_Face(_fontRef);
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}
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s_cacheFontData[_fontName].referenceCount -= 1;
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if (s_cacheFontData[_fontName].referenceCount == 0)
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{
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s_cacheFontData.erase(_fontName);
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}
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}
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FontAtlas * FontFreeType::createFontAtlas()
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{
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FontAtlas *atlas = new (std::nothrow) FontAtlas(*this);
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if (_usedGlyphs != GlyphCollection::DYNAMIC)
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{
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std::u16string utf16;
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if (StringUtils::UTF8ToUTF16(getCurrentGlyphCollection(), utf16))
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{
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atlas->prepareLetterDefinitions(utf16);
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}
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}
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this->release();
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return atlas;
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}
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int * FontFreeType::getHorizontalKerningForTextUTF16(const std::u16string& text, int &outNumLetters) const
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{
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if (!_fontRef)
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return nullptr;
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outNumLetters = static_cast<int>(text.length());
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if (!outNumLetters)
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return nullptr;
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int *sizes = new int[outNumLetters];
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if (!sizes)
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return nullptr;
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memset(sizes,0,outNumLetters * sizeof(int));
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bool hasKerning = FT_HAS_KERNING( _fontRef ) != 0;
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if (hasKerning)
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{
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for (int c = 1; c < outNumLetters; ++c)
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{
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sizes[c] = getHorizontalKerningForChars(text[c-1], text[c]);
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}
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}
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return sizes;
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}
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int FontFreeType::getHorizontalKerningForChars(unsigned short firstChar, unsigned short secondChar) const
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{
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// get the ID to the char we need
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int glyphIndex1 = FT_Get_Char_Index(_fontRef, firstChar);
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if (!glyphIndex1)
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return 0;
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// get the ID to the char we need
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int glyphIndex2 = FT_Get_Char_Index(_fontRef, secondChar);
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if (!glyphIndex2)
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return 0;
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FT_Vector kerning;
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if (FT_Get_Kerning( _fontRef, glyphIndex1, glyphIndex2, FT_KERNING_DEFAULT, &kerning))
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return 0;
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return (static_cast<int>(kerning.x >> 6));
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}
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int FontFreeType::getFontMaxHeight() const
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{
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return (static_cast<int>(_fontRef->size->metrics.height >> 6));
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}
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int FontFreeType::getFontAscender() const
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{
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return (static_cast<int>(_fontRef->size->metrics.ascender >> 6));
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}
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unsigned char* FontFreeType::getGlyphBitmap(unsigned short theChar, long &outWidth, long &outHeight, Rect &outRect,int &xAdvance)
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{
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bool invalidChar = true;
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unsigned char * ret = nullptr;
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do
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{
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if (!_fontRef)
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break;
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auto glyphIndex = FT_Get_Char_Index(_fontRef, theChar);
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if(!glyphIndex)
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break;
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if (_distanceFieldEnabled)
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{
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if (FT_Load_Glyph(_fontRef,glyphIndex,FT_LOAD_RENDER | FT_LOAD_NO_HINTING | FT_LOAD_NO_AUTOHINT))
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break;
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}
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else
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{
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if (FT_Load_Glyph(_fontRef,glyphIndex,FT_LOAD_RENDER | FT_LOAD_NO_AUTOHINT))
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break;
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}
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auto& metrics = _fontRef->glyph->metrics;
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outRect.origin.x = metrics.horiBearingX >> 6;
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outRect.origin.y = -(metrics.horiBearingY >> 6);
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outRect.size.width = (metrics.width >> 6);
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outRect.size.height = (metrics.height >> 6);
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xAdvance = (static_cast<int>(_fontRef->glyph->metrics.horiAdvance >> 6));
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outWidth = _fontRef->glyph->bitmap.width;
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outHeight = _fontRef->glyph->bitmap.rows;
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ret = _fontRef->glyph->bitmap.buffer;
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if (_outlineSize > 0)
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{
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auto copyBitmap = new unsigned char[outWidth * outHeight];
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memcpy(copyBitmap,ret,outWidth * outHeight * sizeof(unsigned char));
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FT_BBox bbox;
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auto outlineBitmap = getGlyphBitmapWithOutline(theChar,bbox);
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if(outlineBitmap == nullptr)
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{
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ret = nullptr;
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delete [] copyBitmap;
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break;
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}
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long glyphMinX = outRect.origin.x;
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long glyphMaxX = outRect.origin.x + outWidth;
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long glyphMinY = -outHeight - outRect.origin.y;
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long glyphMaxY = -outRect.origin.y;
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auto outlineMinX = bbox.xMin >> 6;
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auto outlineMaxX = bbox.xMax >> 6;
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auto outlineMinY = bbox.yMin >> 6;
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auto outlineMaxY = bbox.yMax >> 6;
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auto outlineWidth = outlineMaxX - outlineMinX;
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auto outlineHeight = outlineMaxY - outlineMinY;
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auto blendImageMinX = MIN(outlineMinX, glyphMinX);
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auto blendImageMaxY = MAX(outlineMaxY, glyphMaxY);
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auto blendWidth = MAX(outlineMaxX, glyphMaxX) - blendImageMinX;
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auto blendHeight = blendImageMaxY - MIN(outlineMinY, glyphMinY);
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outRect.origin.x = blendImageMinX;
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outRect.origin.y = -blendImageMaxY;
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long index, index2;
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auto blendImage = new unsigned char[blendWidth * blendHeight * 2];
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memset(blendImage, 0, blendWidth * blendHeight * 2);
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auto px = outlineMinX - blendImageMinX;
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auto py = blendImageMaxY - outlineMaxY;
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for (int x = 0; x < outlineWidth; ++x)
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{
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for (int y = 0; y < outlineHeight; ++y)
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{
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index = px + x + ((py + y) * blendWidth);
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index2 = x + (y * outlineWidth);
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blendImage[2 * index] = outlineBitmap[index2];
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}
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}
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px = glyphMinX - blendImageMinX;
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py = blendImageMaxY - glyphMaxY;
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for (int x = 0; x < outWidth; ++x)
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{
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for (int y = 0; y < outHeight; ++y)
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{
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index = px + x + ((y + py) * blendWidth);
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index2 = x + (y * outWidth);
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blendImage[2 * index + 1] = copyBitmap[index2];
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}
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}
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xAdvance += 2 * _outlineSize;
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outRect.size.width = blendWidth;
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outRect.size.height = blendHeight;
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outWidth = blendWidth;
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outHeight = blendHeight;
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delete [] outlineBitmap;
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delete [] copyBitmap;
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ret = blendImage;
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}
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invalidChar = false;
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} while (0);
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if (invalidChar)
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{
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outRect.size.width = 0;
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outRect.size.height = 0;
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xAdvance = 0;
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return nullptr;
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}
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else
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{
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return ret;
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}
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}
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unsigned char * FontFreeType::getGlyphBitmapWithOutline(unsigned short theChar, FT_BBox &bbox)
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{
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unsigned char* ret = nullptr;
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FT_UInt gindex = FT_Get_Char_Index(_fontRef, theChar);
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if (FT_Load_Glyph(_fontRef, gindex, FT_LOAD_NO_BITMAP) == 0)
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{
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if (_fontRef->glyph->format == FT_GLYPH_FORMAT_OUTLINE)
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{
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FT_Glyph glyph;
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if (FT_Get_Glyph(_fontRef->glyph, &glyph) == 0)
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{
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FT_Glyph_StrokeBorder(&glyph, _stroker, 0, 1);
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if (glyph->format == FT_GLYPH_FORMAT_OUTLINE)
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{
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FT_Outline *outline = &reinterpret_cast<FT_OutlineGlyph>(glyph)->outline;
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FT_Glyph_Get_CBox(glyph,FT_GLYPH_BBOX_GRIDFIT,&bbox);
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long width = (bbox.xMax - bbox.xMin)>>6;
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long rows = (bbox.yMax - bbox.yMin)>>6;
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FT_Bitmap bmp;
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bmp.buffer = new unsigned char[width * rows];
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memset(bmp.buffer, 0, width * rows);
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bmp.width = (int)width;
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bmp.rows = (int)rows;
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bmp.pitch = (int)width;
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bmp.pixel_mode = FT_PIXEL_MODE_GRAY;
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bmp.num_grays = 256;
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FT_Raster_Params params;
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memset(¶ms, 0, sizeof (params));
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params.source = outline;
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params.target = &bmp;
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params.flags = FT_RASTER_FLAG_AA;
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FT_Outline_Translate(outline,-bbox.xMin,-bbox.yMin);
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FT_Outline_Render(_FTlibrary, outline, ¶ms);
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ret = bmp.buffer;
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}
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FT_Done_Glyph(glyph);
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}
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}
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}
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return ret;
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}
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unsigned char * makeDistanceMap( unsigned char *img, long width, long height)
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{
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long pixelAmount = (width + 2 * FontFreeType::DistanceMapSpread) * (height + 2 * FontFreeType::DistanceMapSpread);
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short * xdist = (short *) malloc( pixelAmount * sizeof(short) );
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short * ydist = (short *) malloc( pixelAmount * sizeof(short) );
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double * gx = (double *) calloc( pixelAmount, sizeof(double) );
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double * gy = (double *) calloc( pixelAmount, sizeof(double) );
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double * data = (double *) calloc( pixelAmount, sizeof(double) );
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double * outside = (double *) calloc( pixelAmount, sizeof(double) );
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double * inside = (double *) calloc( pixelAmount, sizeof(double) );
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long i,j;
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// Convert img into double (data) rescale image levels between 0 and 1
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long outWidth = width + 2 * FontFreeType::DistanceMapSpread;
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for (i = 0; i < width; ++i)
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{
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for (j = 0; j < height; ++j)
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{
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data[j * outWidth + FontFreeType::DistanceMapSpread + i] = img[j * width + i] / 255.0;
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}
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}
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width += 2 * FontFreeType::DistanceMapSpread;
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height += 2 * FontFreeType::DistanceMapSpread;
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// Transform background (outside contour, in areas of 0's)
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computegradient( data, (int)width, (int)height, gx, gy);
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edtaa3(data, gx, gy, (int)width, (int)height, xdist, ydist, outside);
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for( i=0; i< pixelAmount; i++)
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if( outside[i] < 0.0 )
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outside[i] = 0.0;
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// Transform foreground (inside contour, in areas of 1's)
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for( i=0; i< pixelAmount; i++)
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data[i] = 1 - data[i];
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computegradient( data, (int)width, (int)height, gx, gy);
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edtaa3(data, gx, gy, (int)width, (int)height, xdist, ydist, inside);
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for( i=0; i< pixelAmount; i++)
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if( inside[i] < 0.0 )
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inside[i] = 0.0;
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// The bipolar distance field is now outside-inside
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double dist;
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/* Single channel 8-bit output (bad precision and range, but simple) */
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unsigned char *out = (unsigned char *) malloc( pixelAmount * sizeof(unsigned char) );
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for( i=0; i < pixelAmount; i++)
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{
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dist = outside[i] - inside[i];
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dist = 128.0 - dist*16;
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if( dist < 0 ) dist = 0;
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if( dist > 255 ) dist = 255;
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out[i] = (unsigned char) dist;
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}
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/* Dual channel 16-bit output (more complicated, but good precision and range) */
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/*unsigned char *out = (unsigned char *) malloc( pixelAmount * 3 * sizeof(unsigned char) );
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for( i=0; i< pixelAmount; i++)
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{
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dist = outside[i] - inside[i];
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dist = 128.0 - dist*16;
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if( dist < 0.0 ) dist = 0.0;
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if( dist >= 256.0 ) dist = 255.999;
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// R channel is a copy of the original grayscale image
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out[3*i] = img[i];
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// G channel is fraction
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out[3*i + 1] = (unsigned char) ( 256 - (dist - floor(dist)* 256.0 ));
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// B channel is truncated integer part
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out[3*i + 2] = (unsigned char)dist;
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}*/
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free( xdist );
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free( ydist );
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free( gx );
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free( gy );
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free( data );
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free( outside );
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free( inside );
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return out;
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}
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void FontFreeType::renderCharAt(unsigned char *dest,int posX, int posY, unsigned char* bitmap,long bitmapWidth,long bitmapHeight)
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{
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int iX = posX;
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int iY = posY;
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if (_distanceFieldEnabled)
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{
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auto distanceMap = makeDistanceMap(bitmap,bitmapWidth,bitmapHeight);
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bitmapWidth += 2 * DistanceMapSpread;
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bitmapHeight += 2 * DistanceMapSpread;
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for (long y = 0; y < bitmapHeight; ++y)
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{
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long bitmap_y = y * bitmapWidth;
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for (long x = 0; x < bitmapWidth; ++x)
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{
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/* Dual channel 16-bit output (more complicated, but good precision and range) */
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/*int index = (iX + ( iY * destSize )) * 3;
|
|
int index2 = (bitmap_y + x)*3;
|
|
dest[index] = out[index2];
|
|
dest[index + 1] = out[index2 + 1];
|
|
dest[index + 2] = out[index2 + 2];*/
|
|
|
|
//Single channel 8-bit output
|
|
dest[iX + ( iY * FontAtlas::CacheTextureWidth )] = distanceMap[bitmap_y + x];
|
|
|
|
iX += 1;
|
|
}
|
|
|
|
iX = posX;
|
|
iY += 1;
|
|
}
|
|
free(distanceMap);
|
|
}
|
|
else if(_outlineSize > 0)
|
|
{
|
|
unsigned char tempChar;
|
|
for (long y = 0; y < bitmapHeight; ++y)
|
|
{
|
|
long bitmap_y = y * bitmapWidth;
|
|
|
|
for (int x = 0; x < bitmapWidth; ++x)
|
|
{
|
|
tempChar = bitmap[(bitmap_y + x) * 2];
|
|
dest[(iX + ( iY * FontAtlas::CacheTextureWidth ) ) * 2] = tempChar;
|
|
tempChar = bitmap[(bitmap_y + x) * 2 + 1];
|
|
dest[(iX + ( iY * FontAtlas::CacheTextureWidth ) ) * 2 + 1] = tempChar;
|
|
|
|
iX += 1;
|
|
}
|
|
|
|
iX = posX;
|
|
iY += 1;
|
|
}
|
|
delete [] bitmap;
|
|
}
|
|
else
|
|
{
|
|
for (long y = 0; y < bitmapHeight; ++y)
|
|
{
|
|
long bitmap_y = y * bitmapWidth;
|
|
|
|
for (int x = 0; x < bitmapWidth; ++x)
|
|
{
|
|
unsigned char cTemp = bitmap[bitmap_y + x];
|
|
|
|
// the final pixel
|
|
dest[(iX + ( iY * FontAtlas::CacheTextureWidth ) )] = cTemp;
|
|
|
|
iX += 1;
|
|
}
|
|
|
|
iX = posX;
|
|
iY += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_CC_END
|