mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
644 lines
24 KiB
C++
644 lines
24 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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Typeface::Ptr Font::Native::getDefaultPlatformTypefaceForFont (const Font& font)
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{
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Font f (font);
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f.setTypefaceName ([&]() -> String
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{
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const auto faceName = font.getTypefaceName();
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if (faceName == Font::getDefaultSansSerifFontName()) return "Roboto";
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if (faceName == Font::getDefaultSerifFontName()) return "Roboto";
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if (faceName == Font::getDefaultMonospacedFontName()) return "Roboto";
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return faceName;
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}());
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return Typeface::createSystemTypefaceFor (f);
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}
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//==============================================================================
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#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
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STATICMETHOD (create, "create", "(Ljava/lang/String;I)Landroid/graphics/Typeface;") \
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STATICMETHOD (createFromFile, "createFromFile", "(Ljava/lang/String;)Landroid/graphics/Typeface;") \
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STATICMETHOD (createFromAsset, "createFromAsset", "(Landroid/content/res/AssetManager;Ljava/lang/String;)Landroid/graphics/Typeface;")
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DECLARE_JNI_CLASS (TypefaceClass, "android/graphics/Typeface")
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#undef JNI_CLASS_MEMBERS
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#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
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METHOD (constructor, "<init>", "()V") \
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METHOD (computeBounds, "computeBounds", "(Landroid/graphics/RectF;Z)V")
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DECLARE_JNI_CLASS (AndroidPath, "android/graphics/Path")
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#undef JNI_CLASS_MEMBERS
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#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
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METHOD (constructor, "<init>", "()V") \
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FIELD (left, "left", "F") \
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FIELD (right, "right", "F") \
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FIELD (top, "top", "F") \
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FIELD (bottom, "bottom", "F") \
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METHOD (roundOut, "roundOut", "(Landroid/graphics/Rect;)V")
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DECLARE_JNI_CLASS (AndroidRectF, "android/graphics/RectF")
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#undef JNI_CLASS_MEMBERS
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#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
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STATICMETHOD (getInstance, "getInstance", "(Ljava/lang/String;)Ljava/security/MessageDigest;") \
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METHOD (update, "update", "([B)V") \
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METHOD (digest, "digest", "()[B")
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DECLARE_JNI_CLASS (JavaMessageDigest, "java/security/MessageDigest")
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#undef JNI_CLASS_MEMBERS
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#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
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METHOD (open, "open", "(Ljava/lang/String;)Ljava/io/InputStream;") \
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DECLARE_JNI_CLASS (AndroidAssetManager, "android/content/res/AssetManager")
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#undef JNI_CLASS_MEMBERS
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// Defined in juce_core
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std::unique_ptr<InputStream> makeAndroidInputStreamWrapper (LocalRef<jobject> stream);
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struct AndroidCachedTypeface
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{
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std::shared_ptr<hb_font_t> font;
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TypefaceAscentDescent nonPortableMetrics;
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};
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//==============================================================================
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class MemoryFontCache : public DeletedAtShutdown
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{
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public:
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using Value = AndroidCachedTypeface;
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~MemoryFontCache()
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{
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clearSingletonInstance();
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}
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struct Key
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{
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String name, style;
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auto tie() const { return std::tuple (name, style); }
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bool operator< (const Key& other) const { return tie() < other.tie(); }
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bool operator== (const Key& other) const { return tie() == other.tie(); }
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};
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void add (const Key& key, const Value& value)
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{
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const std::scoped_lock lock { mutex };
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cache.emplace (key, value);
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}
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void remove (const Key& p)
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{
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const std::scoped_lock lock { mutex };
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cache.erase (p);
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}
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std::set<String> getAllNames() const
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{
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const std::scoped_lock lock { mutex };
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std::set<String> result;
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for (const auto& item : cache)
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result.insert (item.first.name);
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return result;
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}
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std::set<String> getStylesForFamily (const String& family) const
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{
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const std::scoped_lock lock { mutex };
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const auto lower = std::lower_bound (cache.begin(), cache.end(), family, [] (const auto& a, const String& b)
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{
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return a.first.name < b;
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});
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const auto upper = std::upper_bound (cache.begin(), cache.end(), family, [] (const String& a, const auto& b)
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{
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return a < b.first.name;
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});
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std::set<String> result;
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for (const auto& item : makeRange (lower, upper))
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result.insert (item.first.style);
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return result;
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}
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std::optional<Value> find (const Key& key) const
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{
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const std::scoped_lock lock { mutex };
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const auto iter = cache.find (key);
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if (iter != cache.end())
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return iter->second;
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return {};
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}
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JUCE_DECLARE_SINGLETON_INLINE (MemoryFontCache, true)
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private:
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std::map<Key, Value> cache;
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mutable std::mutex mutex;
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};
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StringArray Font::findAllTypefaceNames()
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{
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auto results = [&]
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{
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if (auto* cache = MemoryFontCache::getInstance())
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return cache->getAllNames();
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return std::set<String>{};
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}();
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for (auto& f : File ("/system/fonts").findChildFiles (File::findFiles, false, "*.ttf"))
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results.insert (f.getFileNameWithoutExtension().upToLastOccurrenceOf ("-", false, false));
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StringArray s;
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for (const auto& family : results)
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s.add (family);
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return s;
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}
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StringArray Font::findAllTypefaceStyles (const String& family)
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{
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auto results = [&]
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{
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if (auto* cache = MemoryFontCache::getInstance())
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return cache->getStylesForFamily (family);
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return std::set<String>{};
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}();
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for (auto& f : File ("/system/fonts").findChildFiles (File::findFiles, false, family + "-*.ttf"))
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results.insert (f.getFileNameWithoutExtension().fromLastOccurrenceOf ("-", false, false));
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StringArray s;
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for (const auto& style : results)
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s.add (style);
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return s;
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}
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//==============================================================================
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class AndroidTypeface final : public Typeface
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{
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public:
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enum class DoCache
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{
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no,
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yes
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};
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static Typeface::Ptr from (const Font& font)
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{
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if (auto* cache = MemoryFontCache::getInstance())
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if (auto result = cache->find ({ font.getTypefaceName(), font.getTypefaceStyle() }))
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return new AndroidTypeface (DoCache::no, result->font, result->nonPortableMetrics, font.getTypefaceName(), font.getTypefaceStyle());
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auto [blob, metrics] = getBlobForFont (font);
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auto face = FontStyleHelpers::getFaceForBlob ({ static_cast<const char*> (blob.getData()), blob.getSize() }, 0);
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if (face == nullptr)
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{
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jassertfalse;
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return {};
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}
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HbFont hbFont { hb_font_create (face.get()) };
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FontStyleHelpers::initSynthetics (hbFont.get(), font);
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return new AndroidTypeface (DoCache::no, std::move (hbFont), metrics, font.getTypefaceName(), font.getTypefaceStyle());
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}
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static Typeface::Ptr from (Span<const std::byte> blob, unsigned int index = 0)
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{
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return fromMemory (DoCache::yes, blob, index);
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}
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Native getNativeDetails() const override
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{
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return Native { hbFont.get(), nonPortableMetrics };
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}
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Typeface::Ptr createSystemFallback (const String& text, const String& language) const override
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{
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if (__builtin_available (android 29, *))
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return matchWithAFontMatcher (text, language);
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// The font-fallback API is only available on Android API level 29+
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jassertfalse;
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return {};
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}
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~AndroidTypeface() override
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{
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if (doCache == DoCache::yes)
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if (auto* c = MemoryFontCache::getInstance())
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c->remove ({ getName(), getStyle() });
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}
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static Typeface::Ptr findSystemTypeface()
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{
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if (__builtin_available (android 29, *))
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return findSystemTypefaceWithMatcher();
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return from (FontOptions{}.withName ("Roboto"));
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}
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private:
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// The definition of __BIONIC_AVAILABILITY was changed in NDK 28.1 and it now has variadic
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// parameters.
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//
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// But __INTRODUCED_IN only has one parameter so there isn't even a way to pass on anything to
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// to __BIONIC_AVAILABILITY.
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JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wgnu-zero-variadic-macro-arguments")
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static __INTRODUCED_IN (29) Typeface::Ptr fromMatchedFont (AFont* matched)
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{
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if (matched == nullptr)
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{
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// Unable to find any matching fonts. This should never happen - in the worst case,
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// we should at least get a font with the tofu character.
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jassertfalse;
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return {};
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}
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const File matchedFile { AFont_getFontFilePath (matched) };
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const auto matchedIndex = AFont_getCollectionIndex (matched);
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auto* cache = TypefaceFileCache::getInstance();
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if (cache == nullptr)
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return {}; // Perhaps we're shutting down
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return cache->get ({ matchedFile, (int) matchedIndex }, &loadCompatibleFont);
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}
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static __INTRODUCED_IN (29) Typeface::Ptr findSystemTypefaceWithMatcher()
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{
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using AFontMatcherPtr = std::unique_ptr<AFontMatcher, FunctionPointerDestructor<AFontMatcher_destroy>>;
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using AFontPtr = std::unique_ptr<AFont, FunctionPointerDestructor<AFont_close>>;
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constexpr uint16_t testString[] { 't', 'e', 's', 't' };
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const AFontMatcherPtr matcher { AFontMatcher_create() };
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const AFontPtr matched { AFontMatcher_match (matcher.get(),
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"system-ui",
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testString,
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std::size (testString),
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nullptr) };
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return fromMatchedFont (matched.get());
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}
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__INTRODUCED_IN (29) Typeface::Ptr matchWithAFontMatcher (const String& text, const String& language) const
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{
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using AFontMatcherPtr = std::unique_ptr<AFontMatcher, FunctionPointerDestructor<AFontMatcher_destroy>>;
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using AFontPtr = std::unique_ptr<AFont, FunctionPointerDestructor<AFont_close>>;
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const AFontMatcherPtr matcher { AFontMatcher_create() };
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const auto weight = hb_style_get_value (hbFont.get(), HB_STYLE_TAG_WEIGHT);
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const auto italic = hb_style_get_value (hbFont.get(), HB_STYLE_TAG_ITALIC) != 0.0f;
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AFontMatcher_setStyle (matcher.get(), (uint16_t) weight, italic);
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AFontMatcher_setLocales (matcher.get(), language.toRawUTF8());
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const auto utf16 = text.toUTF16();
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const AFontPtr matched { AFontMatcher_match (matcher.get(),
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readFontName (hb_font_get_face (hbFont.get()),
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HB_OT_NAME_ID_FONT_FAMILY,
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nullptr).toRawUTF8(),
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unalignedPointerCast<const uint16_t*> (utf16.getAddress()),
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(uint32_t) (utf16.findTerminatingNull().getAddress() - utf16.getAddress()),
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nullptr) };
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return fromMatchedFont (matched.get());
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}
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JUCE_END_IGNORE_WARNINGS_GCC_LIKE
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static Typeface::Ptr loadCompatibleFont (const TypefaceFileAndIndex& info)
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{
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FileInputStream stream { info.file };
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if (! stream.openedOk())
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return {};
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MemoryBlock mb;
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stream.readIntoMemoryBlock (mb);
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auto result = fromMemory (DoCache::no,
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{ static_cast<const std::byte*> (mb.getData()), mb.getSize() },
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(unsigned int) info.index);
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if (result == nullptr)
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return {};
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const auto tech = result->getColourGlyphFormats();
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const auto hasSupportedColours = (tech & (colourGlyphFormatCOLRv0 | colourGlyphFormatBitmap)) != 0;
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// If the font only uses unsupported colour technologies, assume it's the system emoji font
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// and try to return a compatible version of the font
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if (tech != 0 && ! hasSupportedColours)
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if (auto fallback = from (FontOptions { "NotoColorEmojiLegacy", FontValues::defaultFontHeight, Font::plain }); fallback != nullptr)
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return fallback;
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return result;
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}
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static Typeface::Ptr fromMemory (DoCache cache, Span<const std::byte> blob, unsigned int index = 0)
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{
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auto face = FontStyleHelpers::getFaceForBlob ({ reinterpret_cast<const char*> (blob.data()), blob.size() }, index);
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if (face == nullptr)
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return {};
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const auto metrics = findNonPortableMetricsForData (blob);
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return new AndroidTypeface (cache,
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HbFont { hb_font_create (face.get()) },
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metrics,
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readFontName (face.get(), HB_OT_NAME_ID_FONT_FAMILY, nullptr),
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readFontName (face.get(), HB_OT_NAME_ID_FONT_SUBFAMILY, nullptr));
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}
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static String readFontName (hb_face_t* face, hb_ot_name_id_t nameId, hb_language_t language)
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{
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unsigned int textSize{};
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textSize = hb_ot_name_get_utf8 (face, nameId, language, &textSize, nullptr);
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std::vector<char> nameString (textSize + 1, 0);
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textSize = (unsigned int) nameString.size();
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hb_ot_name_get_utf8 (face, nameId, language, &textSize, nameString.data());
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return nameString.data();
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}
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AndroidTypeface (DoCache cache,
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std::shared_ptr<hb_font_t> fontIn,
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TypefaceAscentDescent nonPortableMetricsIn,
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const String& name,
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const String& style)
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: Typeface (name, style),
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hbFont (std::move (fontIn)),
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doCache (cache),
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nonPortableMetrics (nonPortableMetricsIn)
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{
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if (doCache == DoCache::yes)
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if (auto* c = MemoryFontCache::getInstance())
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c->add ({ name, style }, { hbFont, nonPortableMetrics });
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}
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static std::tuple<MemoryBlock, TypefaceAscentDescent> getBlobForFont (const Font& font)
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{
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auto memory = loadFontAsset (font.getTypefaceName());
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if (! memory.isEmpty())
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return std::tuple (memory, findNonPortableMetricsForAsset (font.getTypefaceName()));
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const auto file = findFontFile (font);
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if (! file.exists())
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{
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// Failed to find file corresponding to this font
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jassertfalse;
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return {};
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}
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FileInputStream stream { file };
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MemoryBlock result;
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stream.readIntoMemoryBlock (result);
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return std::tuple (stream.isExhausted() ? result : MemoryBlock{}, findNonPortableMetricsForFile (file));
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}
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static File findFontFile (const Font& font)
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{
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const String styles[] { font.getTypefaceStyle(),
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FontStyleHelpers::getStyleName (font.isBold(), font.isItalic()),
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{} };
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for (const auto& style : styles)
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if (auto file = getFontFile (font.getTypefaceName(), style); file.exists())
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return file;
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for (auto& file : File ("/system/fonts").findChildFiles (File::findFiles, false, "*.ttf"))
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if (file.getFileName().startsWith (font.getTypefaceName()))
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return file;
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return {};
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}
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static File getFontFile (const String& family, const String& fontStyle)
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{
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return "/system/fonts/" + family + (fontStyle.isNotEmpty() ? ("-" + fontStyle) : String{}) + ".ttf";
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}
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static MemoryBlock loadFontAsset (const String& typefaceName)
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{
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auto* env = getEnv();
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const LocalRef assetManager { env->CallObjectMethod (getAppContext().get(), AndroidContext.getAssets) };
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if (assetManager == nullptr)
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return {};
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const LocalRef inputStream { env->CallObjectMethod (assetManager,
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AndroidAssetManager.open,
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javaString ("fonts/" + typefaceName).get()) };
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// Opening an input stream for an asset might throw if the asset isn't found
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jniCheckHasExceptionOccurredAndClear();
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if (inputStream == nullptr)
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return {};
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auto streamWrapper = makeAndroidInputStreamWrapper (inputStream);
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if (streamWrapper == nullptr)
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return {};
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MemoryBlock result;
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streamWrapper->readIntoMemoryBlock (result);
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return streamWrapper->isExhausted() ? result : MemoryBlock{};
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}
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static File getCacheFileForData (Span<const std::byte> data)
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{
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static CriticalSection cs;
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static std::map<String, File> cache;
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JNIEnv* const env = getEnv();
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const auto key = [&]
|
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{
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LocalRef digest (env->CallStaticObjectMethod (JavaMessageDigest, JavaMessageDigest.getInstance, javaString ("MD5").get()));
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LocalRef bytes (env->NewByteArray ((int) data.size()));
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jboolean ignore;
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auto* jbytes = env->GetByteArrayElements (bytes.get(), &ignore);
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memcpy (jbytes, data.data(), data.size());
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env->ReleaseByteArrayElements (bytes.get(), jbytes, 0);
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env->CallVoidMethod (digest.get(), JavaMessageDigest.update, bytes.get());
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LocalRef result ((jbyteArray) env->CallObjectMethod (digest.get(), JavaMessageDigest.digest));
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auto* md5Bytes = env->GetByteArrayElements (result.get(), &ignore);
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const ScopeGuard scope { [&] { env->ReleaseByteArrayElements (result.get(), md5Bytes, 0); } };
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return String::toHexString (md5Bytes, env->GetArrayLength (result.get()), 0);
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}();
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const ScopedLock lock (cs);
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auto& mapEntry = cache[key];
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if (mapEntry == File())
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|
{
|
|
static const File cacheDirectory = []
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{
|
|
auto appContext = getAppContext();
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if (appContext == nullptr)
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return File{};
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auto* localEnv = getEnv();
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LocalRef cacheFile (localEnv->CallObjectMethod (appContext.get(), AndroidContext.getCacheDir));
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LocalRef jPath ((jstring) localEnv->CallObjectMethod (cacheFile.get(), JavaFile.getAbsolutePath));
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return File (juceString (localEnv, jPath.get()));
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}();
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mapEntry = cacheDirectory.getChildFile ("bindata_" + key);
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mapEntry.replaceWithData (data.data(), data.size());
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}
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return mapEntry;
|
|
}
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static TypefaceAscentDescent findNonPortableMetricsForFile (File file)
|
|
{
|
|
auto* env = getEnv();
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|
const LocalRef typeface { env->CallStaticObjectMethod (TypefaceClass,
|
|
TypefaceClass.createFromFile,
|
|
javaString (file.getFullPathName()).get()) };
|
|
return findNonPortableMetricsForTypeface (typeface);
|
|
}
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|
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static TypefaceAscentDescent findNonPortableMetricsForData (Span<const std::byte> bytes)
|
|
{
|
|
const auto file = getCacheFileForData (bytes);
|
|
return findNonPortableMetricsForFile (file);
|
|
}
|
|
|
|
static TypefaceAscentDescent findNonPortableMetricsForAsset (const String& name)
|
|
{
|
|
auto* env = getEnv();
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|
|
|
const LocalRef assetManager { env->CallObjectMethod (getAppContext().get(), AndroidContext.getAssets) };
|
|
const LocalRef typeface { env->CallStaticObjectMethod (TypefaceClass,
|
|
TypefaceClass.createFromAsset,
|
|
assetManager.get(),
|
|
javaString ("fonts/" + name).get()) };
|
|
return findNonPortableMetricsForTypeface (typeface);
|
|
}
|
|
|
|
static TypefaceAscentDescent findNonPortableMetricsForTypeface (const LocalRef<jobject>& typeface)
|
|
{
|
|
constexpr auto referenceFontSize = 256.0f;
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|
|
auto* env = getEnv();
|
|
|
|
jint constructorFlags = 1 /*ANTI_ALIAS_FLAG*/
|
|
| 2 /*FILTER_BITMAP_FLAG*/
|
|
| 4 /*DITHER_FLAG*/
|
|
| 128 /*SUBPIXEL_TEXT_FLAG*/;
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|
|
|
const LocalRef paint { env->NewObject (AndroidPaint, AndroidPaint.constructor, constructorFlags) };
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|
|
|
env->CallObjectMethod (paint, AndroidPaint.setTypeface, typeface.get());
|
|
env->CallVoidMethod (paint, AndroidPaint.setTextSize, referenceFontSize);
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|
|
|
const auto fullAscent = std::abs (env->CallFloatMethod (paint, AndroidPaint.ascent));
|
|
const auto fullDescent = std::abs (env->CallFloatMethod (paint, AndroidPaint.descent));
|
|
|
|
return TypefaceAscentDescent { fullAscent / referenceFontSize,
|
|
fullDescent / referenceFontSize };
|
|
}
|
|
|
|
std::shared_ptr<hb_font_t> hbFont;
|
|
DoCache doCache;
|
|
TypefaceAscentDescent nonPortableMetrics;
|
|
};
|
|
|
|
//==============================================================================
|
|
Typeface::Ptr Typeface::createSystemTypefaceFor (const Font& font)
|
|
{
|
|
return AndroidTypeface::from (font);
|
|
}
|
|
|
|
Typeface::Ptr Typeface::createSystemTypefaceFor (Span<const std::byte> data)
|
|
{
|
|
return AndroidTypeface::from (data);
|
|
}
|
|
|
|
Typeface::Ptr Typeface::findSystemTypeface()
|
|
{
|
|
return AndroidTypeface::findSystemTypeface();
|
|
}
|
|
|
|
void Typeface::scanFolderForFonts (const File&)
|
|
{
|
|
jassertfalse; // not currently available
|
|
}
|
|
|
|
} // namespace juce
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