120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
/**************************************************************************\
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*
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* Copyright (c) 2000 Microsoft Corporation
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*
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* Module Name:
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*
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* fontcollection.hpp
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*
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* Abstract:
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*
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* Font collection. These objects implement the internal GdiPlus
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* installable fonts (system fonts) and private fonts (fonts an
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* application can temporarily install).
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*
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* Revision History:
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*
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* 03/06/00 DChinn
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* Created it.
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*
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\**************************************************************************/
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#ifndef _FONTCOLLECTION_HPP
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#define _FONTCOLLECTION_HPP
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class GpFontCollection
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{
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private:
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// We now use an ObjectTag to determine if the object is valid
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// instead of using a BOOL. This is much more robust and helps
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// with debugging. It also enables us to version our objects
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// more easily with a version number in the ObjectTag.
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ObjectTag Tag; // Keep this as the 1st value in the object!
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protected:
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VOID SetValid(BOOL valid)
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{
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Tag = valid ? ObjectTagFontCollection : ObjectTagInvalid;
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}
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public:
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BOOL IsValid() const
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{
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#ifdef _X86_
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// We have to guarantee that the Tag field doesn't move for
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// versioning to work between releases of GDI+.
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ASSERT(offsetof(GpFontCollection, Tag) == 4);
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#endif
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ASSERT((Tag == ObjectTagFontCollection) || (Tag == ObjectTagInvalid));
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#if DBG
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if (Tag == ObjectTagInvalid)
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{
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WARNING1("Invalid FontCollection");
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}
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#endif
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return (Tag == ObjectTagFontCollection);
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}
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GpFontCollection()
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{
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SetValid(TRUE); // default is valid
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}
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~GpFontCollection()
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{
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SetValid(FALSE); // so we don't use a deleted object
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}
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INT GetFamilyCount (); // number of enumerable families in the collection
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GpStatus GetFamilies ( // enumerate the fonts in a collection
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INT numSought,
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GpFontFamily* gpfamilies[],
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INT* numFound
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);
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virtual BOOL LoadRegistered()=0; // is TRUE if we should load all registered
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// fonts every time we try to enumerate
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// (e.g., if the object is an installed
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// font collection)
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GpFontTable *GetFontTable() { return FontTable; }
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protected:
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GpFontTable *FontTable; // hash table of GpFontFile
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};
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class GpInstalledFontCollection : public GpFontCollection
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{
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public:
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~GpInstalledFontCollection();
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static GpInstalledFontCollection* GetGpInstalledFontCollection();
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GpStatus InstallFontFile (const WCHAR *filename);
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GpStatus UninstallFontFile (const WCHAR *filename);
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virtual BOOL LoadRegistered() { return TRUE; }
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protected:
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GpInstalledFontCollection();
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private:
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static GpInstalledFontCollection* instance;
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};
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class GpPrivateFontCollection : public GpFontCollection
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{
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public:
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GpPrivateFontCollection();
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~GpPrivateFontCollection();
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GpStatus AddFontFile (const WCHAR *filename);
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GpStatus AddMemoryFont (const void *memory, INT length);
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virtual BOOL LoadRegistered() { return FALSE; }
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};
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#endif // FONTCOLLECTION_HPP
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