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common/vgui_surfacelib/Win32Font.h

@@ -0,0 +1,148 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef WIN32FONT_H
+#define WIN32FONT_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#if !defined( _X360 )
+#define WIN32_LEAN_AND_MEAN
+#define OEMRESOURCE
+#include <windows.h>
+#endif
+#ifdef GetCharABCWidths
+#undef GetCharABCWidths
+#endif
+
+#include "utlrbtree.h"
+#include "tier1/utlsymbol.h"
+
+struct newChar_t;
+
+//-----------------------------------------------------------------------------
+// Purpose: encapsulates a windows font
+//-----------------------------------------------------------------------------
+
+class CWin32Font
+{
+public:
+	CWin32Font();
+	~CWin32Font();
+
+	// creates the font from windows.  returns false if font does not exist in the OS.
+	virtual bool Create(const char *windowsFontName, 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
+	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
+	virtual void SetAsActiveFont(HDC hdc);
+
+	// returns the height of the font, in pixels
+	virtual int GetHeight();
+
+	// returns requested height of 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
+	bool GetUnderlined() { return m_bUnderlined; }
+
+	// gets the name of this font
+	const char *GetName() { return m_szName.String(); }
+	const char *GetFamilyName() { return NULL; }
+
+	// gets the width of ch given its position around before and after chars
+	void GetKernedCharWidth( wchar_t ch, wchar_t chBefore, wchar_t chAfter, float &wide, float &abcA );
+
+#if defined( _X360 )
+	// generates texture data for a set of chars
+	virtual void GetCharsRGBA( newChar_t *newChars, int numNewChars, unsigned char *pRGBA );
+
+	virtual void CloseResource();
+#endif
+
+private:
+
+#if !defined( _X360 )
+	HFONT			m_hFont;
+	HDC				m_hDC;
+	HBITMAP			m_hDIB;
+#else
+	HXUIFONT		m_hFont;
+	HDC				m_hDC;
+#endif
+
+	// pointer to buffer for use when generated bitmap versions of a texture
+	unsigned char	*m_pBuf;
+
+protected:
+	CUtlSymbol		m_szName;
+
+	short			m_iTall;
+	unsigned short	m_iWeight;
+	unsigned short	m_iFlags;
+	unsigned short	m_iScanLines;
+	unsigned short	m_iBlur;
+	unsigned short	m_rgiBitmapSize[2];
+	bool			m_bUnderlined;
+
+	unsigned int	m_iHeight : 8;
+	unsigned int	m_iMaxCharWidth : 8;
+	unsigned int	m_iAscent : 8;
+	unsigned int	m_iDropShadowOffset : 1;
+	unsigned int	m_iOutlineSize : 1;
+	unsigned int	m_bAntiAliased : 1;
+	unsigned int	m_bRotary : 1;
+	unsigned int	m_bAdditive : 1; //29
+
+private:
+	// abc widths
+	struct abc_t
+	{
+		short b;
+		char a;
+		char c;
+	};
+
+#if !defined( _X360 )
+	// On PC we cache char widths on demand when actually requested to minimize our use of the kernels 
+	// paged pool (GDI may cache information about glyphs we have requested and take up lots of paged pool)
+	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);
+#else
+	// 360 requires all possible characters during font init
+	enum { ABCWIDTHS_CACHE_SIZE = 256 };
+	abc_t m_ABCWidthsCache[ABCWIDTHS_CACHE_SIZE];
+#endif
+};
+
+#endif // WIN32FONT_H