123

CryFont/FontTexture.h

@@ -0,0 +1,177 @@
+//-------------------------------------------------------------------------------------------------
+// Author: M<>rcio Martins
+//
+// Purpose:
+//  - Create and update a texture with the most recently used glyphs
+//
+// History:
+//  - [6/6/2003] created the file
+//
+//-------------------------------------------------------------------------------------------------
+#pragma once
+
+
+#ifdef WIN64
+// Workaround for Amd64 compiler
+#include <map>
+#define hash_map map
+#else
+#if defined(LINUX)
+#include <ext/hash_map>
+#else
+#include <hash_map>
+#endif
+#endif
+
+#include <string>
+
+#include "GlyphCache.h"
+#include "GlyphBitmap.h"
+
+
+// comment this to use 8bit (alpha only texture) wich is both faster, and uses much less memory
+//#undef 	FONT_USE_32BIT_TEXTURE
+#define	FONT_USE_32BIT_TEXTURE
+
+// the number of slots in the glyph cache
+// each slot ocupies ((glyph_bitmap_width * glyph_bitmap_height) + 24) bytes
+#define	FONT_GLYPH_CACHE_SIZE			(1)
+
+// the glyph spacing offset from the left margin, in pixels
+#define FONT_GLYPH_OFFSET					(2)
+
+// the size of a rendered space, this value gets multiplied by the default characted width
+#define FONT_SPACE_SIZE						(0.5f)
+
+// don't draw this char (used to avoid drawing color codes)
+#define FONT_NOT_DRAWABLE_CHAR		(0xffff)
+
+// smoothing methods
+#define FONT_SMOOTH_NONE			0
+#define FONT_SMOOTH_BLUR			1
+#define FONT_SMOOTH_SUPERSAMPLE		2
+
+// smoothing amounts
+#define FONT_SMOOTH_AMOUNT_NONE		0
+#define FONT_SMOOTH_AMOUNT_2X		1
+#define FONT_SMOOTH_AMOUNT_4X		2
+
+
+typedef struct CTextureSlot
+{
+	unsigned int	dwUsage;
+	wchar_t				cCurrentChar;
+
+	int						iTextureSlot;
+	float					vTexCoord[2];
+	int						iCharWidth;
+	int						iCharHeight;
+
+	void			Reset()
+	{
+		dwUsage = 0;
+		cCurrentChar = -1;
+		iCharWidth = 0;
+		iCharHeight = 0;
+
+	};
+
+} CTextureSlot;
+
+
+typedef std::vector<CTextureSlot *>							CTextureSlotList;
+typedef std::vector<CTextureSlot *>::iterator				CTextureSlotListItor;
+
+typedef std::hash_map<wchar_t, CTextureSlot *>				CTextureSlotTable;
+typedef std::hash_map<wchar_t, CTextureSlot *>::iterator	CTextureSlotTableItor;
+
+#ifdef WIN64
+#undef GetCharWidth
+#undef GetCharHeight
+#endif
+
+class CFontTexture
+{
+public:
+	CFontTexture();
+	~CFontTexture();
+
+	int CreateFromFile(const string &szFileName, int iWidth, int iHeight, int iSmoothMethod, int iSmoothAmount, float fSizeRatio = 0.8f, int iWidthCharCount = 16, int iHeightCharCount = 16);
+	int CreateFromMemory(unsigned char *pFileData, int iDataSize, int iWidth, int iHeight, int iSmoothMethod, int iSmoothAmount, float fSizeRatio = 0.875f, int iWidthCharCount = 16, int iHeightCharCount = 16);
+	int Create(int iWidth, int iHeight, int iSmoothMethod, int iSmoothAmount, float fSizeRatio = 0.8f, int iWidthCharCount = 16, int iHeightCharCount = 16);
+	int Release();
+
+	int SetEncoding(FT_Encoding pEncoding) { return m_pGlyphCache.SetEncoding(pEncoding); };
+	FT_Encoding GetEncoding() { return m_pGlyphCache.GetEncoding(); };
+
+	int GetCellWidth() { return m_iCellWidth; };
+	int GetCellHeight() { return m_iCellHeight; };
+
+	int GetWidth() { return m_iWidth; };
+	int GetHeight() { return m_iHeight; };
+
+	int GetWidthCellCount() { return m_iWidthCellCount; };
+	int GetHeightCellCount() { return m_iHeightCellCount; };
+
+	float GetTextureCellWidth() { return m_fTextureCellWidth; };
+	float GetTextureCellHeight() { return m_fTextureCellHeight; };
+
+#ifdef FONT_USE_32BIT_TEXTURE
+	 unsigned int *GetBuffer() { return m_pBuffer; };
+#else
+	unsigned char *GetBuffer() { return m_pBuffer; };
+#endif
+
+	wchar_t			GetSlotChar(int iSlot);
+	CTextureSlot	*GetCharSlot(wchar_t cChar);
+
+	CTextureSlot	*GetLRUSlot();
+	CTextureSlot	*GetMRUSlot();
+
+	// returns 1 if texture updated, returns 2 if texture not updated, returns 0 on error
+	// pUpdated is the number of slots updated
+	int PreCacheString(const wchar_t *szString, int *pUpdated = 0);
+	int GetTextureCoord(wchar_t cChar, float *fU, float *fV);
+	int GetCharWidth(wchar_t cChar);
+	int GetCharHeight(wchar_t cChar);
+
+	int WriteToFile(const string &szFileName);
+
+private:
+
+	int				CreateSlotList(int iListSize);
+	int				ReleaseSlotList();
+
+	int				UpdateSlot(int iSlot, unsigned int dwUsage, wchar_t cChar);
+
+	int				m_iWidth;
+	int				m_iHeight;
+
+	int				m_iCellWidth;
+	int				m_iCellHeight;
+
+	float			m_fTextureCellWidth;
+	float			m_fTextureCellHeight;
+
+	int				m_iWidthCellCount;
+	int				m_iHeightCellCount;
+
+	int				m_nTextureSlotCount;
+
+	int				m_iSmoothMethod;
+	int				m_iSmoothAmount;
+
+	CGlyphCache		m_pGlyphCache;
+	CTextureSlotList m_pSlotList;
+	CTextureSlotTable m_pSlotTable;
+
+
+#ifdef FONT_USE_32BIT_TEXTURE
+	unsigned int	*m_pBuffer;
+#else
+	unsigned char	*m_pBuffer;
+#endif
+
+	unsigned int	m_dwUsage;
+};
+