94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// NoesisGUI - http://www.noesisengine.com
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// Copyright (c) 2013 Noesis Technologies S.L. All Rights Reserved.
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////////////////////////////////////////////////////////////////////////////////////////////////////
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#ifndef __GUI_CACHEDFONTPROVIDER_H__
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#define __GUI_CACHEDFONTPROVIDER_H__
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#include <NsCore/Noesis.h>
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#include <NsCore/Vector.h>
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#include <NsCore/HashMap.h>
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#include <NsCore/String.h>
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#include <NsGui/FontProvider.h>
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#include <NsGui/CachedFontProviderApi.h>
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namespace Noesis
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{
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NS_WARNING_PUSH
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NS_MSVC_WARNING_DISABLE(4251 4275)
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Helper base class for implementing font providers
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////////////////////////////////////////////////////////////////////////////////////////////////////
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class NS_GUI_CACHEDFONTPROVIDER_API CachedFontProvider: public FontProvider
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{
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protected:
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/// Registers a font filename in the given folder. Each time this function is invoked, the
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/// given filename is opened and scanned (through OpenFont). It is recommended deferring
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/// this call as much as possible (for example, until ScanFolder is invoked)
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void RegisterFont(const Uri& folder, const char* filename);
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/// Registers a font face with given font properties. In comparison with the previous function
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/// this one doesn't open the filename to scan it. Always use this function if possible
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void RegisterFont(const Uri& folder, const char* filename, uint32_t index, const char* family,
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const char* faceName, FontWeight weight, FontStretch stretch, FontStyle style,
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uint32_t flags = 0);
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/// First time a font is requested from a folder, this function is invoked to give inheritors
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/// the opportunity to register faces found in that folder
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virtual void ScanFolder(const Uri& folder);
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/// Returns a stream to a previously registered filename
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virtual Ptr<Stream> OpenFont(const Uri& folder, const char* filename) const = 0;
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/// From FontProvider
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//@{
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FontSource MatchFont(const Uri& baseUri, const char* familyName, FontWeight& weight,
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FontStretch& stretch, FontStyle& style) override;
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bool FamilyExists(const Uri& baseUri, const char* familyName) override;
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//@}
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private:
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struct Face
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{
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FixedString<64> filename;
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FixedString<64> faceName;
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uint32_t faceIndex;
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FontWeight weight;
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FontStretch stretch;
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FontStyle style;
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enum Flags
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{
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Flags_VarWeight = 1,
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Flags_VarWidth = 2,
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Flags_VarItalic = 4
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};
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uint32_t flags;
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};
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template<class T> using Bucket = HashBucket_KHV<String, T, CaseStringHashKeyInfo>;
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typedef Vector<Face> Family;
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typedef HashMap<String, Family, 0, Bucket<Family>> Families;
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typedef HashMap<String, Families, 0, Bucket<Families>> Folders;
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Folders mFolders;
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Families& GetFolder(const Uri& folder);
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FontSource FindBestMatch(const Uri& folder, const Family& faces, FontWeight& weight,
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FontStretch& stretch, FontStyle& style) const;
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};
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NS_WARNING_POP
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}
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#endif
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