mirror of https://github.com/axmolengine/axmol.git
412 lines
12 KiB
C++
412 lines
12 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 <stdio.h>
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#include <algorithm>
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#include "ccUTF8.h"
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#include "CCFontFreeType.h"
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#include "platform/CCFileUtils.h"
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#include "edtaa3func.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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FontFreeType * FontFreeType::create(const std::string &fontName, int fontSize, GlyphCollection glyphs, const char *customGlyphs)
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{
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FontFreeType *tempFont = new FontFreeType();
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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()
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: _fontRef(nullptr)
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,_distanceFieldEnabled(false)
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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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_ttfData = FileUtils::getInstance()->getDataFromFile(fontName);
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if (_ttfData.isNull())
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return false;
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// create the face from the data
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if (FT_New_Memory_Face(getFTLibrary(), _ttfData.getBytes(), _ttfData.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);
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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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// save font name locally
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_fontName = fontName;
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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 (_fontRef)
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{
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FT_Done_Face(_fontRef);
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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 FontAtlas(*this);
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if (_usedGlyphs != GlyphCollection::DYNAMIC)
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{
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atlas->prepareLetterDefinitions(cc_utf8_to_utf16(getCurrentGlyphCollection()));
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}
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this->release();
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return atlas;
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}
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bool FontFreeType::getBBOXFotChar(unsigned short theChar, Rect &outRect, int &xAdvance) const
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{
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if (!_fontRef)
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return false;
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// get the ID to the char we need
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int glyph_index = FT_Get_Char_Index(_fontRef, theChar);
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if (!glyph_index)
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return false;
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// load glyph infos
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if (FT_Load_Glyph(_fontRef, glyph_index, FT_LOAD_DEFAULT))
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return false;
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// store result in the passed rectangle
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outRect.origin.x = _fontRef->glyph->metrics.horiBearingX >> 6;
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outRect.origin.y = - (_fontRef->glyph->metrics.horiBearingY >> 6);
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outRect.size.width = (_fontRef->glyph->metrics.width >> 6);
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outRect.size.height = (_fontRef->glyph->metrics.height >> 6);
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xAdvance = (static_cast<int>(_fontRef->glyph->metrics.horiAdvance >> 6));
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return true;
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}
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int * FontFreeType::getHorizontalKerningForTextUTF16(unsigned short *text, int &outNumLetters) const
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{
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if (!text)
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return 0;
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outNumLetters = cc_wcslen(text);
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if (!outNumLetters)
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return 0;
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int *sizes = new int[outNumLetters];
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if (!sizes)
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return 0;
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for (int c = 0; c < outNumLetters; ++c)
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{
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if (c < (outNumLetters-1))
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sizes[c] = getHorizontalKerningForChars(text[c], text[c+1]);
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else
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sizes[c] = 0;
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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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if (!_fontRef)
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return 0;
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bool hasKerning = FT_HAS_KERNING( _fontRef ) != 0;
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if (!hasKerning)
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return 0;
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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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unsigned char * FontFreeType::getGlyphBitmap(unsigned short theChar, int &outWidth, int &outHeight) const
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{
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if (!_fontRef)
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return 0;
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if (_distanceFieldEnabled)
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{
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if (FT_Load_Char(_fontRef,theChar,FT_LOAD_RENDER | FT_LOAD_NO_HINTING | FT_LOAD_NO_AUTOHINT))
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return 0;
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}
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else
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{
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if (FT_Load_Char(_fontRef,theChar,FT_LOAD_RENDER))
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return 0;
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}
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outWidth = _fontRef->glyph->bitmap.width;
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outHeight = _fontRef->glyph->bitmap.rows;
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// return the pointer to the bitmap
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return _fontRef->glyph->bitmap.buffer;
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}
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unsigned char * makeDistanceMap( unsigned char *img, unsigned int width, unsigned int height)
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{
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unsigned int 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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unsigned int i,j;
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// Convert img into double (data) rescale image levels between 0 and 1
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unsigned int 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, width, height, gx, gy);
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edtaa3(data, gx, gy, width, 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, width, height, gx, gy);
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edtaa3(data, gx, gy, width, 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::setDistanceFieldEnabled(bool distanceFieldEnabled)
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{
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_distanceFieldEnabled = distanceFieldEnabled;
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}
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bool FontFreeType::renderCharAt(unsigned short int charToRender, int posX, int posY, unsigned char *destMemory, int destSize)
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{
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unsigned char *sourceBitmap = 0;
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int sourceWidth = 0;
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int sourceHeight = 0;
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sourceBitmap = getGlyphBitmap(charToRender, sourceWidth, sourceHeight);
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if (!sourceBitmap)
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return false;
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if (_distanceFieldEnabled)
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{
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unsigned char * out = makeDistanceMap(sourceBitmap,sourceWidth,sourceHeight);
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int iX = posX;
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int iY = posY;
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sourceWidth += 2 * DistanceMapSpread;
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sourceHeight += 2 * DistanceMapSpread;
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for (int y = 0; y < sourceHeight; ++y)
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{
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int bitmap_y = y * sourceWidth;
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for (int x = 0; x < sourceWidth; ++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;
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int index2 = (bitmap_y + x)*3;
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destMemory[index] = out[index2];
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destMemory[index + 1] = out[index2 + 1];
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destMemory[index + 2] = out[index2 + 2];*/
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//Single channel 8-bit output
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destMemory[iX + ( iY * destSize )] = out[bitmap_y + x];
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iX += 1;
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}
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iX = posX;
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iY += 1;
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}
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free(out);
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return true;
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}
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int iX = posX;
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int iY = posY;
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for (int y = 0; y < sourceHeight; ++y)
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{
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int bitmap_y = y * sourceWidth;
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for (int x = 0; x < sourceWidth; ++x)
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{
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unsigned char cTemp = sourceBitmap[bitmap_y + x];
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// the final pixel
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destMemory[(iX + ( iY * destSize ) )] = cTemp;
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iX += 1;
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}
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iX = posX;
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iY += 1;
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}
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//everything good
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return true;
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}
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NS_CC_END |