mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
562 lines
18 KiB
C++
562 lines
18 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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struct FTLibWrapper : public ReferenceCountedObject
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{
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FTLibWrapper() : library (0)
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{
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if (FT_Init_FreeType (&library) != 0)
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{
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library = 0;
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DBG ("Failed to initialize FreeType");
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}
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}
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~FTLibWrapper()
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{
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if (library != 0)
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FT_Done_FreeType (library);
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}
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FT_Library library;
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typedef ReferenceCountedObjectPtr <FTLibWrapper> Ptr;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FTLibWrapper);
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};
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//==============================================================================
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struct FTFaceWrapper : public ReferenceCountedObject
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{
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FTFaceWrapper (const FTLibWrapper::Ptr& ftLib, const File& file, int faceIndex)
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: face (0), library (ftLib)
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{
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if (FT_New_Face (ftLib->library, file.getFullPathName().toUTF8(), faceIndex, &face) != 0)
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face = 0;
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}
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~FTFaceWrapper()
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{
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if (face != 0)
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FT_Done_Face (face);
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}
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FT_Face face;
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FTLibWrapper::Ptr library;
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typedef ReferenceCountedObjectPtr <FTFaceWrapper> Ptr;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FTFaceWrapper);
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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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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LinuxFontFileIterator);
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};
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//==============================================================================
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class FTTypefaceList : private DeletedAtShutdown
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{
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public:
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FTTypefaceList()
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: library (new FTLibWrapper())
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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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int faceIndex = 0;
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int numFaces = 0;
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do
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{
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FTFaceWrapper face (library, fontFileIterator.getFile(), faceIndex);
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if (face.face != 0)
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{
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if (faceIndex == 0)
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numFaces = face.face->num_faces;
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if ((face.face->face_flags & FT_FACE_FLAG_SCALABLE) != 0)
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faces.add (new KnownTypeface (fontFileIterator.getFile(), faceIndex, 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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~FTTypefaceList()
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{
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clearSingletonInstance();
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}
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//==============================================================================
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struct KnownTypeface
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{
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KnownTypeface (const File& file_, const int faceIndex_, const FTFaceWrapper& face)
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: file (file_),
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family (face.face->family_name),
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style (face.face->style_name),
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faceIndex (faceIndex_),
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isMonospaced ((face.face->face_flags & FT_FACE_FLAG_FIXED_WIDTH) != 0),
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isSansSerif (isFaceSansSerif (family))
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{
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}
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const File file;
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const String family, style;
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const int faceIndex;
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const bool isMonospaced, isSansSerif;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (KnownTypeface);
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};
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//==============================================================================
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FTFaceWrapper::Ptr createFace (const String& fontName, const String& fontStyle)
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{
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const KnownTypeface* ftFace = matchTypeface (fontName, fontStyle);
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if (ftFace == nullptr)
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ftFace = matchTypeface (fontName, "Regular");
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if (ftFace == nullptr)
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ftFace = matchTypeface (fontName, String::empty);
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if (ftFace != nullptr)
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{
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FTFaceWrapper::Ptr face (new FTFaceWrapper (library, ftFace->file, ftFace->faceIndex));
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if (face->face != 0)
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{
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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->face, ft_encoding_unicode) != 0)
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FT_Set_Charmap (face->face, face->face->charmaps[0]);
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return face;
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}
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}
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return nullptr;
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}
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//==============================================================================
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StringArray findAllFamilyNames() const
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{
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StringArray s;
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for (int i = 0; i < faces.size(); i++)
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s.addIfNotAlreadyThere (faces.getUnchecked(i)->family);
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return s;
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}
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StringArray findAllTypefaceStyles (const String& family) const
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{
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StringArray s;
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for (int i = 0; i < faces.size(); i++)
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{
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const KnownTypeface* const face = faces.getUnchecked(i);
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if (face->family == family)
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s.addIfNotAlreadyThere (face->style);
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}
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return s;
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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.getUnchecked(i)->isMonospaced)
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monoSpaced.addIfNotAlreadyThere (faces.getUnchecked(i)->family);
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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.getUnchecked(i)->isSansSerif)
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serif.addIfNotAlreadyThere (faces.getUnchecked(i)->family);
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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.getUnchecked(i)->isSansSerif)
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sansSerif.addIfNotAlreadyThere (faces.getUnchecked(i)->family);
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}
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juce_DeclareSingleton_SingleThreaded_Minimal (FTTypefaceList);
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private:
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FTLibWrapper::Ptr library;
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OwnedArray<KnownTypeface> faces;
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const KnownTypeface* matchTypeface (const String& familyName, const String& style) const noexcept
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{
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for (int i = 0; i < faces.size(); ++i)
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{
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const KnownTypeface* const face = faces.getUnchecked(i);
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if (face->family == familyName
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&& (face->style.equalsIgnoreCase (style) || style.isEmpty()))
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return face;
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}
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return nullptr;
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}
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static bool isFaceSansSerif (const String& family)
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{
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const char* sansNames[] = { "Sans", "Verdana", "Arial", "Ubuntu" };
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for (int i = 0; i < numElementsInArray (sansNames); ++i)
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if (family.containsIgnoreCase (sansNames[i]))
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return true;
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return false;
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FTTypefaceList);
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};
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juce_ImplementSingleton_SingleThreaded (FTTypefaceList)
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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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: faceWrapper (FTTypefaceList::getInstance()
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->createFace (font.getTypefaceName(), font.getTypefaceStyle()))
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{
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if (faceWrapper != nullptr)
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{
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setCharacteristics (font.getTypefaceName(),
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font.getTypefaceStyle(),
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faceWrapper->face->ascender / (float) (faceWrapper->face->ascender - faceWrapper->face->descender),
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L' ');
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}
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else
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{
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DBG ("Failed to create typeface: " << font.toString());
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}
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}
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bool loadGlyphIfPossible (const juce_wchar character)
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{
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if (faceWrapper != nullptr)
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{
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FT_Face face = faceWrapper->face;
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const unsigned int glyphIndex = FT_Get_Char_Index (face, character);
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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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const float scale = 1.0f / (float) (face->ascender - face->descender);
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Path destShape;
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if (getGlyphShape (destShape, face->glyph->outline, scale))
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{
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addGlyph (character, destShape, face->glyph->metrics.horiAdvance * scale);
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if ((face->face_flags & FT_FACE_FLAG_KERNING) != 0)
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addKerning (face, character, glyphIndex);
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return true;
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}
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}
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}
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return false;
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}
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private:
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FTFaceWrapper::Ptr faceWrapper;
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bool getGlyphShape (Path& destShape, const FT_Outline& outline, const float scaleX)
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{
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const float scaleY = -scaleX;
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const short* const contours = outline.contours;
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const char* const tags = outline.tags;
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const 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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const int next1 = p + 1;
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const int next2 = (p == (endPoint - 1)) ? startPoint : (p + 2);
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if (p >= endPoint
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|| 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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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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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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return true;
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}
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void addKerning (FT_Face face, 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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&& kerning.x != 0)
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addKerningPair (character, rightCharCode, kerning.x / height);
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rightCharCode = FT_Get_Next_Char (face, rightCharCode, &rightGlyphIndex);
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}
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}
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JUCE_DECLARE_NON_COPYABLE (FreeTypeTypeface);
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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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StringArray Font::findAllTypefaceNames()
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{
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return FTTypefaceList::getInstance()->findAllFamilyNames();
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}
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StringArray Font::findAllTypefaceStyles (const String& family)
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{
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return FTTypefaceList::getInstance()->findAllTypefaceStyles (family);
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}
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//==============================================================================
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struct DefaultFontNames
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{
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DefaultFontNames()
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: defaultSans (getDefaultSansSerifFontName()),
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defaultSerif (getDefaultSerifFontName()),
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defaultFixed (getDefaultMonospacedFontName())
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{
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}
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String defaultSans, defaultSerif, defaultFixed;
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private:
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static String pickBestFont (const StringArray& names, const char* const* choicesArray)
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{
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const StringArray choices (choicesArray);
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for (int 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 (int j = 0; j < choices.size(); ++j)
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for (int 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 (int j = 0; j < choices.size(); ++j)
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for (int 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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static String getDefaultSansSerifFontName()
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{
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StringArray allFonts;
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FTTypefaceList::getInstance()->getSansSerifNames (allFonts);
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const char* targets[] = { "Verdana", "Bitstream Vera Sans", "Luxi Sans",
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"Liberation Sans", "DejaVu Sans", "Sans", 0 };
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return pickBestFont (allFonts, targets);
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}
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static String getDefaultSerifFontName()
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{
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StringArray allFonts;
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FTTypefaceList::getInstance()->getSerifNames (allFonts);
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const char* targets[] = { "Bitstream Vera Serif", "Times", "Nimbus Roman",
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"Liberation Serif", "DejaVu Serif", "Serif", 0 };
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return pickBestFont (allFonts, targets);
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}
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static String getDefaultMonospacedFontName()
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{
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StringArray allFonts;
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FTTypefaceList::getInstance()->getMonospacedNames (allFonts);
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const char* targets[] = { "Bitstream Vera Sans Mono", "Courier", "Sans Mono",
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"Liberation Mono", "DejaVu Mono", "Mono", 0 };
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return pickBestFont (allFonts, targets);
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}
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JUCE_DECLARE_NON_COPYABLE (DefaultFontNames);
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};
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Typeface::Ptr Font::getDefaultTypefaceForFont (const Font& font)
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{
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static DefaultFontNames defaultNames;
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String faceName (font.getTypefaceName());
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if (faceName == getDefaultSansSerifFontName()) faceName = defaultNames.defaultSans;
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else if (faceName == getDefaultSerifFontName()) faceName = defaultNames.defaultSerif;
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else if (faceName == getDefaultMonospacedFontName()) faceName = defaultNames.defaultFixed;
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Font f (font);
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f.setTypefaceName (faceName);
|
|
return Typeface::createSystemTypefaceFor (f);
|
|
}
|
|
|
|
bool TextLayout::createNativeLayout (const AttributedString&)
|
|
{
|
|
return false;
|
|
}
|