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720 lines
21 KiB
720 lines
21 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found 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.juce.com for more information.
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==============================================================================
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*/
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namespace FontValues
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{
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static float limitFontHeight (const float height) noexcept
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{
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return jlimit (0.1f, 10000.0f, height);
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}
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const float defaultFontHeight = 14.0f;
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String fallbackFont;
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String fallbackFontStyle;
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}
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typedef Typeface::Ptr (*GetTypefaceForFont) (const Font&);
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GetTypefaceForFont juce_getTypefaceForFont = nullptr;
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//==============================================================================
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class TypefaceCache : private DeletedAtShutdown
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{
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public:
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TypefaceCache() : counter (0)
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{
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setSize (10);
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}
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~TypefaceCache()
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{
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clearSingletonInstance();
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}
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juce_DeclareSingleton (TypefaceCache, false);
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void setSize (const int numToCache)
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{
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const ScopedWriteLock sl (lock);
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faces.clear();
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faces.insertMultiple (-1, CachedFace(), numToCache);
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}
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void clear()
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{
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const ScopedWriteLock sl (lock);
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setSize (faces.size());
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defaultFace = nullptr;
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}
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Typeface::Ptr findTypefaceFor (const Font& font)
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{
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const ScopedReadLock slr (lock);
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const String faceName (font.getTypefaceName());
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const String faceStyle (font.getTypefaceStyle());
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jassert (faceName.isNotEmpty());
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for (int i = faces.size(); --i >= 0;)
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{
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CachedFace& face = faces.getReference(i);
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if (face.typefaceName == faceName
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&& face.typefaceStyle == faceStyle
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&& face.typeface != nullptr
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&& face.typeface->isSuitableForFont (font))
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{
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face.lastUsageCount = ++counter;
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return face.typeface;
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}
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}
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const ScopedWriteLock slw (lock);
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int replaceIndex = 0;
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size_t bestLastUsageCount = std::numeric_limits<size_t>::max();
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for (int i = faces.size(); --i >= 0;)
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{
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const size_t lu = faces.getReference(i).lastUsageCount;
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if (bestLastUsageCount > lu)
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{
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bestLastUsageCount = lu;
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replaceIndex = i;
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}
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}
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CachedFace& face = faces.getReference (replaceIndex);
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face.typefaceName = faceName;
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face.typefaceStyle = faceStyle;
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face.lastUsageCount = ++counter;
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if (juce_getTypefaceForFont == nullptr)
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face.typeface = Font::getDefaultTypefaceForFont (font);
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else
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face.typeface = juce_getTypefaceForFont (font);
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jassert (face.typeface != nullptr); // the look and feel must return a typeface!
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if (defaultFace == nullptr && font == Font())
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defaultFace = face.typeface;
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return face.typeface;
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}
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Typeface::Ptr defaultFace;
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private:
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struct CachedFace
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{
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CachedFace() noexcept : lastUsageCount (0) {}
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// Although it seems a bit wacky to store the name here, it's because it may be a
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// placeholder rather than a real one, e.g. "<Sans-Serif>" vs the actual typeface name.
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// Since the typeface itself doesn't know that it may have this alias, the name under
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// which it was fetched needs to be stored separately.
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String typefaceName, typefaceStyle;
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size_t lastUsageCount;
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Typeface::Ptr typeface;
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};
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ReadWriteLock lock;
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Array<CachedFace> faces;
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size_t counter;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (TypefaceCache)
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};
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juce_ImplementSingleton (TypefaceCache)
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void Typeface::setTypefaceCacheSize (int numFontsToCache)
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{
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TypefaceCache::getInstance()->setSize (numFontsToCache);
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}
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#if JUCE_MODULE_AVAILABLE_juce_opengl
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extern void clearOpenGLGlyphCache();
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#endif
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void Typeface::clearTypefaceCache()
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{
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TypefaceCache::getInstance()->clear();
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RenderingHelpers::SoftwareRendererSavedState::clearGlyphCache();
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#if JUCE_MODULE_AVAILABLE_juce_opengl
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clearOpenGLGlyphCache();
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#endif
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}
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//==============================================================================
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class Font::SharedFontInternal : public ReferenceCountedObject
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{
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public:
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SharedFontInternal() noexcept
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: typeface (TypefaceCache::getInstance()->defaultFace),
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typefaceName (Font::getDefaultSansSerifFontName()),
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typefaceStyle (Font::getDefaultStyle()),
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height (FontValues::defaultFontHeight),
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horizontalScale (1.0f), kerning (0), ascent (0), underline (false)
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{
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}
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SharedFontInternal (int styleFlags, float fontHeight) noexcept
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: typefaceName (Font::getDefaultSansSerifFontName()),
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typefaceStyle (FontStyleHelpers::getStyleName (styleFlags)),
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height (fontHeight),
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horizontalScale (1.0f), kerning (0), ascent (0), underline ((styleFlags & underlined) != 0)
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{
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if (styleFlags == plain)
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typeface = TypefaceCache::getInstance()->defaultFace;
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}
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SharedFontInternal (const String& name, int styleFlags, float fontHeight) noexcept
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: typefaceName (name),
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typefaceStyle (FontStyleHelpers::getStyleName (styleFlags)),
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height (fontHeight),
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horizontalScale (1.0f), kerning (0), ascent (0), underline ((styleFlags & underlined) != 0)
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{
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if (styleFlags == plain && typefaceName.isEmpty())
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typeface = TypefaceCache::getInstance()->defaultFace;
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}
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SharedFontInternal (const String& name, const String& style, float fontHeight) noexcept
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: typefaceName (name), typefaceStyle (style), height (fontHeight),
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horizontalScale (1.0f), kerning (0), ascent (0), underline (false)
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{
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if (typefaceName.isEmpty())
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typefaceName = Font::getDefaultSansSerifFontName();
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}
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explicit SharedFontInternal (const Typeface::Ptr& face) noexcept
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: typeface (face),
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typefaceName (face->getName()),
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typefaceStyle (face->getStyle()),
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height (FontValues::defaultFontHeight),
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horizontalScale (1.0f), kerning (0), ascent (0), underline (false)
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{
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jassert (typefaceName.isNotEmpty());
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}
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SharedFontInternal (const SharedFontInternal& other) noexcept
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: ReferenceCountedObject(),
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typeface (other.typeface),
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typefaceName (other.typefaceName),
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typefaceStyle (other.typefaceStyle),
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height (other.height),
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horizontalScale (other.horizontalScale),
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kerning (other.kerning),
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ascent (other.ascent),
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underline (other.underline)
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{
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}
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bool operator== (const SharedFontInternal& other) const noexcept
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{
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return height == other.height
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&& underline == other.underline
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&& horizontalScale == other.horizontalScale
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&& kerning == other.kerning
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&& typefaceName == other.typefaceName
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&& typefaceStyle == other.typefaceStyle;
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}
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Typeface::Ptr typeface;
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String typefaceName, typefaceStyle;
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float height, horizontalScale, kerning, ascent;
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bool underline;
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};
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//==============================================================================
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Font::Font() : font (new SharedFontInternal()) {}
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Font::Font (const Typeface::Ptr& typeface) : font (new SharedFontInternal (typeface)) {}
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Font::Font (const Font& other) noexcept : font (other.font) {}
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Font::Font (float fontHeight, int styleFlags)
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: font (new SharedFontInternal (styleFlags, FontValues::limitFontHeight (fontHeight)))
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{
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}
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Font::Font (const String& typefaceName, float fontHeight, int styleFlags)
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: font (new SharedFontInternal (typefaceName, styleFlags, FontValues::limitFontHeight (fontHeight)))
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{
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}
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Font::Font (const String& typefaceName, const String& typefaceStyle, float fontHeight)
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: font (new SharedFontInternal (typefaceName, typefaceStyle, FontValues::limitFontHeight (fontHeight)))
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{
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}
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Font& Font::operator= (const Font& other) noexcept
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{
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font = other.font;
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return *this;
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}
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#if JUCE_COMPILER_SUPPORTS_MOVE_SEMANTICS
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Font::Font (Font&& other) noexcept
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: font (static_cast<ReferenceCountedObjectPtr<SharedFontInternal>&&> (other.font))
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{
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}
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Font& Font::operator= (Font&& other) noexcept
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{
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font = static_cast<ReferenceCountedObjectPtr<SharedFontInternal>&&> (other.font);
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return *this;
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}
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#endif
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Font::~Font() noexcept
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{
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}
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bool Font::operator== (const Font& other) const noexcept
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{
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return font == other.font
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|| *font == *other.font;
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}
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bool Font::operator!= (const Font& other) const noexcept
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{
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return ! operator== (other);
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}
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void Font::dupeInternalIfShared()
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{
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if (font->getReferenceCount() > 1)
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font = new SharedFontInternal (*font);
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}
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void Font::checkTypefaceSuitability()
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{
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if (font->typeface != nullptr && ! font->typeface->isSuitableForFont (*this))
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font->typeface = nullptr;
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}
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//==============================================================================
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struct FontPlaceholderNames
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{
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FontPlaceholderNames()
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: sans ("<Sans-Serif>"),
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serif ("<Serif>"),
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mono ("<Monospaced>"),
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regular ("<Regular>")
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{
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}
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String sans, serif, mono, regular;
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};
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const FontPlaceholderNames& getFontPlaceholderNames()
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{
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static FontPlaceholderNames names;
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return names;
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}
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#if JUCE_MSVC
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// This is a workaround for the lack of thread-safety in MSVC's handling of function-local
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// statics - if multiple threads all try to create the first Font object at the same time,
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// it can cause a race-condition in creating these placeholder strings.
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struct FontNamePreloader { FontNamePreloader() { getFontPlaceholderNames(); } };
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static FontNamePreloader fnp;
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#endif
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const String& Font::getDefaultSansSerifFontName() { return getFontPlaceholderNames().sans; }
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const String& Font::getDefaultSerifFontName() { return getFontPlaceholderNames().serif; }
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const String& Font::getDefaultMonospacedFontName() { return getFontPlaceholderNames().mono; }
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const String& Font::getDefaultStyle() { return getFontPlaceholderNames().regular; }
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const String& Font::getTypefaceName() const noexcept { return font->typefaceName; }
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const String& Font::getTypefaceStyle() const noexcept { return font->typefaceStyle; }
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void Font::setTypefaceName (const String& faceName)
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{
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if (faceName != font->typefaceName)
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{
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jassert (faceName.isNotEmpty());
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dupeInternalIfShared();
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font->typefaceName = faceName;
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font->typeface = nullptr;
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font->ascent = 0;
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}
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}
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void Font::setTypefaceStyle (const String& typefaceStyle)
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{
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if (typefaceStyle != font->typefaceStyle)
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{
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dupeInternalIfShared();
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font->typefaceStyle = typefaceStyle;
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font->typeface = nullptr;
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font->ascent = 0;
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}
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}
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Font Font::withTypefaceStyle (const String& newStyle) const
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{
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Font f (*this);
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f.setTypefaceStyle (newStyle);
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return f;
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}
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StringArray Font::getAvailableStyles() const
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{
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return findAllTypefaceStyles (getTypeface()->getName());
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}
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Typeface* Font::getTypeface() const
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{
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if (font->typeface == nullptr)
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{
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font->typeface = TypefaceCache::getInstance()->findTypefaceFor (*this);
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jassert (font->typeface != nullptr);
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}
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return font->typeface;
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}
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//==============================================================================
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const String& Font::getFallbackFontName()
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{
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return FontValues::fallbackFont;
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}
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void Font::setFallbackFontName (const String& name)
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{
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FontValues::fallbackFont = name;
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#if JUCE_MAC || JUCE_IOS
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jassertfalse; // Note that use of a fallback font isn't currently implemented in OSX..
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#endif
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}
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const String& Font::getFallbackFontStyle()
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{
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return FontValues::fallbackFontStyle;
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}
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void Font::setFallbackFontStyle (const String& style)
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{
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FontValues::fallbackFontStyle = style;
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#if JUCE_MAC || JUCE_IOS
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jassertfalse; // Note that use of a fallback font isn't currently implemented in OSX..
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#endif
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}
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//==============================================================================
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Font Font::withHeight (const float newHeight) const
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{
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Font f (*this);
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f.setHeight (newHeight);
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return f;
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}
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float Font::getHeightToPointsFactor() const
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{
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return getTypeface()->getHeightToPointsFactor();
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}
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Font Font::withPointHeight (float heightInPoints) const
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{
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Font f (*this);
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f.setHeight (heightInPoints / getHeightToPointsFactor());
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return f;
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}
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void Font::setHeight (float newHeight)
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{
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newHeight = FontValues::limitFontHeight (newHeight);
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if (font->height != newHeight)
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{
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dupeInternalIfShared();
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font->height = newHeight;
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checkTypefaceSuitability();
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}
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}
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void Font::setHeightWithoutChangingWidth (float newHeight)
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{
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newHeight = FontValues::limitFontHeight (newHeight);
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if (font->height != newHeight)
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{
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dupeInternalIfShared();
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font->horizontalScale *= (font->height / newHeight);
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font->height = newHeight;
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checkTypefaceSuitability();
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}
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}
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int Font::getStyleFlags() const noexcept
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{
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int styleFlags = font->underline ? underlined : plain;
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if (isBold()) styleFlags |= bold;
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if (isItalic()) styleFlags |= italic;
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return styleFlags;
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}
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Font Font::withStyle (const int newFlags) const
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{
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Font f (*this);
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f.setStyleFlags (newFlags);
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return f;
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}
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void Font::setStyleFlags (const int newFlags)
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{
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if (getStyleFlags() != newFlags)
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{
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dupeInternalIfShared();
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font->typeface = nullptr;
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font->typefaceStyle = FontStyleHelpers::getStyleName (newFlags);
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font->underline = (newFlags & underlined) != 0;
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font->ascent = 0;
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}
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}
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void Font::setSizeAndStyle (float newHeight,
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const int newStyleFlags,
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const float newHorizontalScale,
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const float newKerningAmount)
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{
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newHeight = FontValues::limitFontHeight (newHeight);
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if (font->height != newHeight
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|| font->horizontalScale != newHorizontalScale
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|| font->kerning != newKerningAmount)
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{
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dupeInternalIfShared();
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font->height = newHeight;
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font->horizontalScale = newHorizontalScale;
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font->kerning = newKerningAmount;
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checkTypefaceSuitability();
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}
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setStyleFlags (newStyleFlags);
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}
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void Font::setSizeAndStyle (float newHeight,
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const String& newStyle,
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const float newHorizontalScale,
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const float newKerningAmount)
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{
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newHeight = FontValues::limitFontHeight (newHeight);
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if (font->height != newHeight
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|| font->horizontalScale != newHorizontalScale
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|| font->kerning != newKerningAmount)
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{
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dupeInternalIfShared();
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font->height = newHeight;
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font->horizontalScale = newHorizontalScale;
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font->kerning = newKerningAmount;
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checkTypefaceSuitability();
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}
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setTypefaceStyle (newStyle);
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}
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Font Font::withHorizontalScale (const float newHorizontalScale) const
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{
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Font f (*this);
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f.setHorizontalScale (newHorizontalScale);
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return f;
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}
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void Font::setHorizontalScale (const float scaleFactor)
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{
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dupeInternalIfShared();
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font->horizontalScale = scaleFactor;
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checkTypefaceSuitability();
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}
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float Font::getHorizontalScale() const noexcept
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{
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return font->horizontalScale;
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}
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float Font::getExtraKerningFactor() const noexcept
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{
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return font->kerning;
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}
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Font Font::withExtraKerningFactor (const float extraKerning) const
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{
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Font f (*this);
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f.setExtraKerningFactor (extraKerning);
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return f;
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}
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void Font::setExtraKerningFactor (const float extraKerning)
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{
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dupeInternalIfShared();
|
|
font->kerning = extraKerning;
|
|
checkTypefaceSuitability();
|
|
}
|
|
|
|
Font Font::boldened() const { return withStyle (getStyleFlags() | bold); }
|
|
Font Font::italicised() const { return withStyle (getStyleFlags() | italic); }
|
|
|
|
bool Font::isBold() const noexcept { return FontStyleHelpers::isBold (font->typefaceStyle); }
|
|
bool Font::isItalic() const noexcept { return FontStyleHelpers::isItalic (font->typefaceStyle); }
|
|
bool Font::isUnderlined() const noexcept { return font->underline; }
|
|
|
|
void Font::setBold (const bool shouldBeBold)
|
|
{
|
|
const int flags = getStyleFlags();
|
|
setStyleFlags (shouldBeBold ? (flags | bold)
|
|
: (flags & ~bold));
|
|
}
|
|
|
|
void Font::setItalic (const bool shouldBeItalic)
|
|
{
|
|
const int flags = getStyleFlags();
|
|
setStyleFlags (shouldBeItalic ? (flags | italic)
|
|
: (flags & ~italic));
|
|
}
|
|
|
|
void Font::setUnderline (const bool shouldBeUnderlined)
|
|
{
|
|
dupeInternalIfShared();
|
|
font->underline = shouldBeUnderlined;
|
|
checkTypefaceSuitability();
|
|
}
|
|
|
|
float Font::getAscent() const
|
|
{
|
|
if (font->ascent == 0)
|
|
font->ascent = getTypeface()->getAscent();
|
|
|
|
return font->height * font->ascent;
|
|
}
|
|
|
|
float Font::getHeight() const noexcept { return font->height; }
|
|
float Font::getDescent() const { return font->height - getAscent(); }
|
|
|
|
float Font::getHeightInPoints() const { return getHeight() * getHeightToPointsFactor(); }
|
|
float Font::getAscentInPoints() const { return getAscent() * getHeightToPointsFactor(); }
|
|
float Font::getDescentInPoints() const { return getDescent() * getHeightToPointsFactor(); }
|
|
|
|
int Font::getStringWidth (const String& text) const
|
|
{
|
|
return roundToInt (getStringWidthFloat (text));
|
|
}
|
|
|
|
float Font::getStringWidthFloat (const String& text) const
|
|
{
|
|
float w = getTypeface()->getStringWidth (text);
|
|
|
|
if (font->kerning != 0)
|
|
w += font->kerning * text.length();
|
|
|
|
return w * font->height * font->horizontalScale;
|
|
}
|
|
|
|
void Font::getGlyphPositions (const String& text, Array<int>& glyphs, Array<float>& xOffsets) const
|
|
{
|
|
getTypeface()->getGlyphPositions (text, glyphs, xOffsets);
|
|
|
|
const int num = xOffsets.size();
|
|
|
|
if (num > 0)
|
|
{
|
|
const float scale = font->height * font->horizontalScale;
|
|
float* const x = xOffsets.getRawDataPointer();
|
|
|
|
if (font->kerning != 0)
|
|
{
|
|
for (int i = 0; i < num; ++i)
|
|
x[i] = (x[i] + i * font->kerning) * scale;
|
|
}
|
|
else
|
|
{
|
|
for (int i = 0; i < num; ++i)
|
|
x[i] *= scale;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Font::findFonts (Array<Font>& destArray)
|
|
{
|
|
const StringArray names (findAllTypefaceNames());
|
|
|
|
for (int i = 0; i < names.size(); ++i)
|
|
{
|
|
const StringArray styles (findAllTypefaceStyles (names[i]));
|
|
|
|
String style ("Regular");
|
|
|
|
if (! styles.contains (style, true))
|
|
style = styles[0];
|
|
|
|
destArray.add (Font (names[i], style, FontValues::defaultFontHeight));
|
|
}
|
|
}
|
|
|
|
//==============================================================================
|
|
String Font::toString() const
|
|
{
|
|
String s;
|
|
|
|
if (getTypefaceName() != getDefaultSansSerifFontName())
|
|
s << getTypefaceName() << "; ";
|
|
|
|
s << String (getHeight(), 1);
|
|
|
|
if (getTypefaceStyle() != getDefaultStyle())
|
|
s << ' ' << getTypefaceStyle();
|
|
|
|
return s;
|
|
}
|
|
|
|
Font Font::fromString (const String& fontDescription)
|
|
{
|
|
const int separator = fontDescription.indexOfChar (';');
|
|
String name;
|
|
|
|
if (separator > 0)
|
|
name = fontDescription.substring (0, separator).trim();
|
|
|
|
if (name.isEmpty())
|
|
name = getDefaultSansSerifFontName();
|
|
|
|
String sizeAndStyle (fontDescription.substring (separator + 1).trimStart());
|
|
|
|
float height = sizeAndStyle.getFloatValue();
|
|
if (height <= 0)
|
|
height = 10.0f;
|
|
|
|
const String style (sizeAndStyle.fromFirstOccurrenceOf (" ", false, false));
|
|
|
|
return Font (name, style, height);
|
|
}
|
|
|