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common/vgui_surfacelib/linuxfont.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef LINUXFONT_H
+#define LINUXFONT_H
+
+#include "utlrbtree.h"
+#include <tier0/memdbgoff.h>
+#include <tier0/memdbgon.h>
+#include "tier1/strtools.h"
+#include "tier1/utlstring.h"
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+
+//-----------------------------------------------------------------------------
+// Purpose: encapsulates a OSX font
+//-----------------------------------------------------------------------------
+class CLinuxFont
+{
+public:
+	CLinuxFont();
+	~CLinuxFont();
+
+	// creates the font from windows.  returns false if font does not exist in the OS.
+	virtual bool CreateFromMemory(const char *windowsFontName, void *data, int size, int tall, int weight, int blur, int scanlines, int flags);
+
+	// writes the char into the specified 32bpp texture
+	virtual void GetCharRGBA( wchar_t ch, int rgbaWide, int rgbaTall, unsigned char *rgba);
+
+	// returns true if the font is equivalent to that specified
+	virtual bool IsEqualTo(const char *windowsFontName, int tall, int weight, int blur, int scanlines, int flags);
+
+	// returns true only if this font is valid for use
+	virtual bool IsValid();
+
+	// gets the abc widths for a character
+	//  A spacing is the distance to add to the current position before drawing the character glyph.
+	//  B spacing is the width of the drawn portion of the glyph.
+	//  C spacing is the distance to add to the current position to provide white space to the right of the glyph.
+	virtual void GetCharABCWidths(int ch, int &a, int &b, int &c);
+
+	// set the font to be the one to currently draw with in the gdi
+	void *SetAsActiveFont( void *glContext );
+
+	// returns the height of the font, in pixels
+	virtual int GetHeight();
+
+	// returns the requested height of the font.
+	virtual int GetHeightRequested();
+
+	// returns the ascent of the font, in pixels (ascent=units above the base line)
+	virtual int GetAscent();
+
+	// returns the maximum width of a character, in pixels
+	virtual int GetMaxCharWidth();
+
+	// returns the flags used to make this font
+	virtual int GetFlags();
+
+	// returns true if this font is underlined
+	virtual bool GetUnderlined() { return m_bUnderlined; }
+	
+	// gets the name of this font
+	const char *GetName() { return m_szName.String(); }
+	const char *GetFamilyName() { return m_face ? m_face->family_name : NULL; }
+
+	// gets the weight of the font
+	virtual int GetWeight() { return m_iWeight; }
+	
+	bool HasChar(wchar_t wch);
+
+	// gets the width of ch given its position around before and after chars
+	virtual void GetKernedCharWidth( wchar_t ch, wchar_t chBefore, wchar_t chAfter, float &wide, float &abcA, float &abcC );
+
+#ifdef DBGFLAG_VALIDATE
+	void Validate( CValidator &validator, char *pchName );
+#endif
+
+	// Given a font name from windows, match it to the filename and return that.
+	static char *GetFontFileName(const char *windowsFontName, int flags);
+
+
+protected:
+	CUtlString m_szName;
+	int m_iTall;
+	int m_iWeight;
+	int m_iFlags;
+	bool m_bAntiAliased;
+	bool m_bRotary;
+	bool m_bAdditive;
+	int m_iDropShadowOffset;
+	bool m_bUnderlined;
+	int m_iOutlineSize;
+
+	int m_iHeight;
+	int m_iHeightRequested;
+	int m_iMaxCharWidth;
+	int m_iAscent;
+
+	int m_iScanLines;
+	int m_iBlur;
+
+private:
+	static void CreateFontList();
+	// abc widths
+	struct abc_t
+	{
+		short b;
+		char a;
+		char c;
+	};
+
+	// cache for storing asian abc widths (since it's too big too just store them all)
+	struct abc_cache_t
+	{
+		wchar_t wch;
+		abc_t abc;
+	};
+
+	
+	CUtlRBTree<abc_cache_t, unsigned short> m_ExtendedABCWidthsCache;
+	static bool ExtendedABCWidthsCacheLessFunc(const abc_cache_t &lhs, const abc_cache_t &rhs);
+
+	// cache for storing asian abc widths (since it's too big too just store them all)
+	struct kernedSize
+	{
+		float wide;
+	};
+	
+	struct kerned_abc_cache_t
+	{
+		wchar_t wch;
+		wchar_t wchBefore;
+		wchar_t wchAfter; 
+		kernedSize abc;
+	};
+	
+	CUtlRBTree<kerned_abc_cache_t, unsigned short> m_ExtendedKernedABCWidthsCache;
+	static bool ExtendedKernedABCWidthsCacheLessFunc(const kerned_abc_cache_t &lhs, const kerned_abc_cache_t &rhs);
+
+	bool m_faceValid;
+	FT_Face m_face;
+
+	struct font_name_entry
+	{
+		font_name_entry()
+		{
+			m_pchFile = NULL;
+			m_pchFriendlyName = NULL;
+		}
+		
+		char *m_pchFile;
+		char *m_pchFriendlyName;
+		bool operator<( const font_name_entry &rhs ) const
+		{
+			return V_stricmp( rhs.m_pchFriendlyName, m_pchFriendlyName ) > 0;
+		}
+	};
+	static CUtlRBTree< font_name_entry > m_FriendlyNameCache;
+	static bool ms_bSetFriendlyNameCacheLessFunc;
+};
+
+#endif // LINUXFONT_H