mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-11 23:54:18 +00:00
603 lines
20 KiB
C++
603 lines
20 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-11 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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*/
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class FreeTypeFontFace
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{
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public:
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//==============================================================================
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enum FontStyle
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{
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Plain = 0,
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Bold = 1,
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Italic = 2
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};
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//==============================================================================
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FreeTypeFontFace (const String& familyName)
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: hasSerif (false),
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monospaced (false)
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{
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family = familyName;
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}
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void setFileName (const String& name, const int faceIndex, FontStyle style)
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{
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if (names [(int) style].fileName.isEmpty())
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{
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names [(int) style].fileName = name;
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names [(int) style].faceIndex = faceIndex;
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}
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}
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const String& getFamilyName() const noexcept { return family; }
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const String& getFileName (const int style, int& faceIndex) const noexcept
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{
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faceIndex = names[style].faceIndex;
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return names[style].fileName;
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}
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void setMonospaced (bool mono) noexcept { monospaced = mono; }
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bool getMonospaced() const noexcept { return monospaced; }
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void setSerif (const bool serif) noexcept { hasSerif = serif; }
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bool getSerif() const noexcept { return hasSerif; }
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private:
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//==============================================================================
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String family;
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struct FontNameIndex
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{
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String fileName;
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int faceIndex;
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};
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FontNameIndex names[4];
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bool hasSerif, monospaced;
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};
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//==============================================================================
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class LinuxFontFileIterator
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{
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public:
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LinuxFontFileIterator()
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: index (0)
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{
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fontDirs.addTokens (CharPointer_UTF8 (getenv ("JUCE_FONT_PATH")), ";,", String::empty);
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fontDirs.removeEmptyStrings (true);
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if (fontDirs.size() == 0)
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{
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const ScopedPointer<XmlElement> fontsInfo (XmlDocument::parse (File ("/etc/fonts/fonts.conf")));
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if (fontsInfo != nullptr)
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{
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forEachXmlChildElementWithTagName (*fontsInfo, e, "dir")
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{
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fontDirs.add (e->getAllSubText().trim());
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}
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}
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}
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if (fontDirs.size() == 0)
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fontDirs.add ("/usr/X11R6/lib/X11/fonts");
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fontDirs.removeEmptyStrings (true);
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}
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bool next()
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{
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if (iter != nullptr)
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{
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while (iter->next())
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if (getFile().hasFileExtension ("ttf;pfb;pcf"))
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return true;
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}
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if (index >= fontDirs.size())
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return false;
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iter = new DirectoryIterator (fontDirs [index++], true);
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return next();
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}
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File getFile() const { jassert (iter != nullptr); return iter->getFile(); }
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private:
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StringArray fontDirs;
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int index;
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ScopedPointer<DirectoryIterator> iter;
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};
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//==============================================================================
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class FreeTypeInterface : public DeletedAtShutdown
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{
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public:
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//==============================================================================
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FreeTypeInterface()
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: ftLib (0),
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lastFace (0),
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lastBold (false),
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lastItalic (false)
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{
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if (FT_Init_FreeType (&ftLib) != 0)
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{
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ftLib = 0;
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DBG ("Failed to initialize FreeType");
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}
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LinuxFontFileIterator fontFileIterator;
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while (fontFileIterator.next())
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{
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FT_Face face;
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int faceIndex = 0;
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int numFaces = 0;
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do
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{
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if (FT_New_Face (ftLib, fontFileIterator.getFile().getFullPathName().toUTF8(),
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faceIndex, &face) == 0)
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{
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if (faceIndex == 0)
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numFaces = face->num_faces;
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if ((face->face_flags & FT_FACE_FLAG_SCALABLE) != 0)
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{
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FreeTypeFontFace* const newFace = findOrCreate (face->family_name, true);
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int style = (int) FreeTypeFontFace::Plain;
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if ((face->style_flags & FT_STYLE_FLAG_BOLD) != 0)
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style |= (int) FreeTypeFontFace::Bold;
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if ((face->style_flags & FT_STYLE_FLAG_ITALIC) != 0)
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style |= (int) FreeTypeFontFace::Italic;
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newFace->setFileName (fontFileIterator.getFile().getFullPathName(),
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faceIndex, (FreeTypeFontFace::FontStyle) style);
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newFace->setMonospaced ((face->face_flags & FT_FACE_FLAG_FIXED_WIDTH) != 0);
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// Surely there must be a better way to do this?
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const String name (face->family_name);
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newFace->setSerif (! (name.containsIgnoreCase ("Sans")
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|| name.containsIgnoreCase ("Verdana")
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|| name.containsIgnoreCase ("Arial")));
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//DBG (fontFileIterator.getFile().getFullPathName() << " - " << name);
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}
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FT_Done_Face (face);
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}
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++faceIndex;
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}
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while (faceIndex < numFaces);
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}
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}
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~FreeTypeInterface()
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{
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if (lastFace != 0)
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FT_Done_Face (lastFace);
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if (ftLib != 0)
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FT_Done_FreeType (ftLib);
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clearSingletonInstance();
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}
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//==============================================================================
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FreeTypeFontFace* findOrCreate (const String& familyName, const bool create = false)
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{
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for (int i = 0; i < faces.size(); i++)
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if (faces[i]->getFamilyName() == familyName)
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return faces[i];
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if (! create)
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return nullptr;
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FreeTypeFontFace* newFace = new FreeTypeFontFace (familyName);
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faces.add (newFace);
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return newFace;
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}
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// Create a FreeType face object for a given font
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FT_Face createFT_Face (const String& fontName, const bool bold, const bool italic)
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{
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FT_Face face = 0;
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if (fontName == lastFontName && bold == lastBold && italic == lastItalic)
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{
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face = lastFace;
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}
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else
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{
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if (lastFace != 0)
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{
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FT_Done_Face (lastFace);
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lastFace = 0;
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}
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lastFontName = fontName;
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lastBold = bold;
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lastItalic = italic;
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FreeTypeFontFace* const ftFace = findOrCreate (fontName);
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if (ftFace != 0)
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{
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int style = (int) FreeTypeFontFace::Plain;
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if (bold)
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style |= (int) FreeTypeFontFace::Bold;
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if (italic)
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style |= (int) FreeTypeFontFace::Italic;
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int faceIndex;
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String fileName (ftFace->getFileName (style, faceIndex));
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if (fileName.isEmpty())
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{
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style ^= (int) FreeTypeFontFace::Bold;
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fileName = ftFace->getFileName (style, faceIndex);
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if (fileName.isEmpty())
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{
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style ^= (int) FreeTypeFontFace::Bold;
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style ^= (int) FreeTypeFontFace::Italic;
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fileName = ftFace->getFileName (style, faceIndex);
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if (! fileName.length())
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{
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style ^= (int) FreeTypeFontFace::Bold;
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fileName = ftFace->getFileName (style, faceIndex);
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}
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}
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}
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if (! FT_New_Face (ftLib, fileName.toUTF8(), faceIndex, &lastFace))
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{
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face = lastFace;
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// If there isn't a unicode charmap then select the first one.
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if (FT_Select_Charmap (face, ft_encoding_unicode))
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FT_Set_Charmap (face, face->charmaps[0]);
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}
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}
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}
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return face;
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}
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bool addGlyph (FT_Face face, CustomTypeface& dest, uint32 character)
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{
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const unsigned int glyphIndex = FT_Get_Char_Index (face, character);
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const float height = (float) (face->ascender - face->descender);
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const float scaleX = 1.0f / height;
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const float scaleY = -1.0f / height;
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Path destShape;
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if (FT_Load_Glyph (face, glyphIndex, FT_LOAD_NO_SCALE | FT_LOAD_NO_BITMAP | FT_LOAD_IGNORE_TRANSFORM) != 0
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|| face->glyph->format != ft_glyph_format_outline)
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{
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return false;
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}
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const FT_Outline* const outline = &face->glyph->outline;
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const short* const contours = outline->contours;
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const char* const tags = outline->tags;
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FT_Vector* const points = outline->points;
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for (int c = 0; c < outline->n_contours; c++)
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{
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const int startPoint = (c == 0) ? 0 : contours [c - 1] + 1;
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const int endPoint = contours[c];
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for (int p = startPoint; p <= endPoint; p++)
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{
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const float x = scaleX * points[p].x;
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const float y = scaleY * points[p].y;
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if (p == startPoint)
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{
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if (FT_CURVE_TAG (tags[p]) == FT_Curve_Tag_Conic)
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{
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float x2 = scaleX * points [endPoint].x;
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float y2 = scaleY * points [endPoint].y;
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if (FT_CURVE_TAG (tags[endPoint]) != FT_Curve_Tag_On)
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{
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x2 = (x + x2) * 0.5f;
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y2 = (y + y2) * 0.5f;
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}
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destShape.startNewSubPath (x2, y2);
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}
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else
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{
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destShape.startNewSubPath (x, y);
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}
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}
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if (FT_CURVE_TAG (tags[p]) == FT_Curve_Tag_On)
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{
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if (p != startPoint)
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destShape.lineTo (x, y);
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}
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else if (FT_CURVE_TAG (tags[p]) == FT_Curve_Tag_Conic)
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{
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const int nextIndex = (p == endPoint) ? startPoint : p + 1;
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float x2 = scaleX * points [nextIndex].x;
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float y2 = scaleY * points [nextIndex].y;
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if (FT_CURVE_TAG (tags [nextIndex]) == FT_Curve_Tag_Conic)
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{
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x2 = (x + x2) * 0.5f;
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y2 = (y + y2) * 0.5f;
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}
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else
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{
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++p;
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}
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destShape.quadraticTo (x, y, x2, y2);
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}
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else if (FT_CURVE_TAG (tags[p]) == FT_Curve_Tag_Cubic)
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{
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if (p >= endPoint)
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return false;
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const int next1 = p + 1;
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const int next2 = (p == (endPoint - 1)) ? startPoint : p + 2;
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const float x2 = scaleX * points [next1].x;
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const float y2 = scaleY * points [next1].y;
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const float x3 = scaleX * points [next2].x;
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const float y3 = scaleY * points [next2].y;
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if (FT_CURVE_TAG (tags[next1]) != FT_Curve_Tag_Cubic
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|| FT_CURVE_TAG (tags[next2]) != FT_Curve_Tag_On)
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return false;
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destShape.cubicTo (x, y, x2, y2, x3, y3);
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p += 2;
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}
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}
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destShape.closeSubPath();
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}
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dest.addGlyph (character, destShape, face->glyph->metrics.horiAdvance / height);
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if ((face->face_flags & FT_FACE_FLAG_KERNING) != 0)
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addKerning (face, dest, character, glyphIndex);
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return true;
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}
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void addKerning (FT_Face face, CustomTypeface& dest, const uint32 character, const uint32 glyphIndex)
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{
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const float height = (float) (face->ascender - face->descender);
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uint32 rightGlyphIndex;
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uint32 rightCharCode = FT_Get_First_Char (face, &rightGlyphIndex);
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while (rightGlyphIndex != 0)
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{
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FT_Vector kerning;
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if (FT_Get_Kerning (face, glyphIndex, rightGlyphIndex, ft_kerning_unscaled, &kerning) == 0)
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{
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if (kerning.x != 0)
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dest.addKerningPair (character, rightCharCode, kerning.x / height);
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}
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rightCharCode = FT_Get_Next_Char (face, rightCharCode, &rightGlyphIndex);
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}
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}
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// Add a glyph to a font
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bool addGlyphToFont (const uint32 character, const String& fontName,
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bool bold, bool italic, CustomTypeface& dest)
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{
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FT_Face face = createFT_Face (fontName, bold, italic);
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return face != 0 && addGlyph (face, dest, character);
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}
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//==============================================================================
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void getFamilyNames (StringArray& familyNames) const
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{
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for (int i = 0; i < faces.size(); i++)
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familyNames.add (faces[i]->getFamilyName());
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}
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void getMonospacedNames (StringArray& monoSpaced) const
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{
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for (int i = 0; i < faces.size(); i++)
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if (faces[i]->getMonospaced())
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monoSpaced.add (faces[i]->getFamilyName());
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}
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void getSerifNames (StringArray& serif) const
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{
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for (int i = 0; i < faces.size(); i++)
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if (faces[i]->getSerif())
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serif.add (faces[i]->getFamilyName());
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}
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void getSansSerifNames (StringArray& sansSerif) const
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{
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for (int i = 0; i < faces.size(); i++)
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if (! faces[i]->getSerif())
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sansSerif.add (faces[i]->getFamilyName());
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}
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juce_DeclareSingleton_SingleThreaded_Minimal (FreeTypeInterface);
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private:
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//==============================================================================
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FT_Library ftLib;
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FT_Face lastFace;
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String lastFontName;
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bool lastBold, lastItalic;
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OwnedArray<FreeTypeFontFace> faces;
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};
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juce_ImplementSingleton_SingleThreaded (FreeTypeInterface)
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//==============================================================================
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class FreetypeTypeface : public CustomTypeface
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{
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public:
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FreetypeTypeface (const Font& font)
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{
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FT_Face face = FreeTypeInterface::getInstance()
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->createFT_Face (font.getTypefaceName(), font.isBold(), font.isItalic());
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if (face == 0)
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{
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#if JUCE_DEBUG
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String msg ("Failed to create typeface: ");
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msg << font.getTypefaceName() << " " << (font.isBold() ? 'B' : ' ') << (font.isItalic() ? 'I' : ' ');
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DBG (msg);
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#endif
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}
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else
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{
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setCharacteristics (font.getTypefaceName(),
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face->ascender / (float) (face->ascender - face->descender),
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font.isBold(), font.isItalic(),
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L' ');
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}
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}
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bool loadGlyphIfPossible (juce_wchar character)
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{
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return FreeTypeInterface::getInstance()
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->addGlyphToFont (character, name, isBold, isItalic, *this);
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}
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};
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Typeface::Ptr Typeface::createSystemTypefaceFor (const Font& font)
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{
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return new FreetypeTypeface (font);
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}
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//==============================================================================
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StringArray Font::findAllTypefaceNames()
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{
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StringArray s;
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FreeTypeInterface::getInstance()->getFamilyNames (s);
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s.sort (true);
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return s;
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}
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namespace LinuxFontHelpers
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{
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String pickBestFont (const StringArray& names,
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const char* const* choicesString)
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{
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const StringArray choices (choicesString);
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int i, j;
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for (j = 0; j < choices.size(); ++j)
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if (names.contains (choices[j], true))
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return choices[j];
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for (j = 0; j < choices.size(); ++j)
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for (i = 0; i < names.size(); i++)
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if (names[i].startsWithIgnoreCase (choices[j]))
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return names[i];
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for (j = 0; j < choices.size(); ++j)
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for (i = 0; i < names.size(); i++)
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if (names[i].containsIgnoreCase (choices[j]))
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return names[i];
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return names[0];
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}
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String getDefaultSansSerifFontName()
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{
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StringArray allFonts;
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FreeTypeInterface::getInstance()->getSansSerifNames (allFonts);
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const char* targets[] = { "Verdana", "Bitstream Vera Sans", "Luxi Sans", "Sans", 0 };
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return pickBestFont (allFonts, targets);
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}
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String getDefaultSerifFontName()
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{
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StringArray allFonts;
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FreeTypeInterface::getInstance()->getSerifNames (allFonts);
|
|
|
|
const char* targets[] = { "Bitstream Vera Serif", "Times", "Nimbus Roman", "Serif", 0 };
|
|
return pickBestFont (allFonts, targets);
|
|
}
|
|
|
|
String getDefaultMonospacedFontName()
|
|
{
|
|
StringArray allFonts;
|
|
FreeTypeInterface::getInstance()->getMonospacedNames (allFonts);
|
|
|
|
const char* targets[] = { "Bitstream Vera Sans Mono", "Courier", "Sans Mono", "Mono", 0 };
|
|
return pickBestFont (allFonts, targets);
|
|
}
|
|
}
|
|
|
|
struct DefaultFontNames
|
|
{
|
|
DefaultFontNames()
|
|
: defaultSans (LinuxFontHelpers::getDefaultSansSerifFontName()),
|
|
defaultSerif (LinuxFontHelpers::getDefaultSerifFontName()),
|
|
defaultFixed (LinuxFontHelpers::getDefaultMonospacedFontName())
|
|
{
|
|
}
|
|
|
|
String defaultSans, defaultSerif, defaultFixed;
|
|
};
|
|
|
|
Typeface::Ptr Font::getDefaultTypefaceForFont (const Font& font)
|
|
{
|
|
static DefaultFontNames defaultNames;
|
|
|
|
String faceName (font.getTypefaceName());
|
|
|
|
if (faceName == Font::getDefaultSansSerifFontName()) faceName = defaultNames.defaultSans;
|
|
else if (faceName == Font::getDefaultSerifFontName()) faceName = defaultNames.defaultSerif;
|
|
else if (faceName == Font::getDefaultMonospacedFontName()) faceName = defaultNames.defaultFixed;
|
|
|
|
Font f (font);
|
|
f.setTypefaceName (faceName);
|
|
return Typeface::createSystemTypefaceFor (f);
|
|
}
|