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/*++
Copyright (c) 2000 Microsoft Corporation
Module Name:
xltt.h
Abstract:
TrueType font handlig object
Environment:
Windows Whistler
Revision History:
03/23/00 Created it.
--*/
#ifndef _XLTT_H_
#define _XLTT_H_
//
// TrueType font
//
// Header
//
typedef struct _TTHEADER { DWORD dwSfntVersion; USHORT usNumTables; USHORT usSearchRange; USHORT usEntrySelector; USHORT usRangeShift;} TTHEADER, *PTTHEADER;
typedef struct _TTCHEADER { DWORD dwTTCTag; DWORD dwVersion; ULONG ulDirCount;} TTCHEADER, *PTTCHEADER;
//
// Directory
//
typedef struct _TTDIR { ULONG ulTag; ULONG ulCheckSum; ULONG ulOffset; ULONG ulLength;} TTDIR, *PTTDIR;
//
// head table
//
typedef DWORD longDateTime[2];
typedef struct _HEAD { DWORD Tableversionnumber; DWORD fontRevision; ULONG checkSumAdjustment; ULONG magicNumber; USHORT flags; USHORT unitsPerEm; longDateTime created; longDateTime modified; FWORD xMin; FWORD yMin; FWORD xMax; FWORD yMax; USHORT macStyle; USHORT lowestRecPPEM; SHORT fontDirectionHint; SHORT indexToLocFormat; SHORT glyphDataFormat;} HEAD, *PHEAD;
//
// maxp table
//
typedef struct _MAXP { DWORD Tableversionnumber; USHORT numGlyphs; USHORT maxPoints; USHORT maxContours; USHORT maxCompositePoints; USHORT maxCompositeContours; USHORT maxZones; USHORT maxTwilightPoints; USHORT maxStorage; USHORT maxFunctionDefs; USHORT maxInstructionDefs; USHORT maxStackElements; USHORT maxSizeOfInstructions; USHORT maxComponentElements; USHORT maxComponentDepth;} MAXP, *PMAXP;
//
// hhea table
//
typedef struct _HHEA { DWORD dwVersion; SHORT sAscender; SHORT sDescender; SHORT sLineGap; USHORT usAdvanceWidthMax; SHORT sMinLeftSideBearing; SHORT sMinRightSideBearing; SHORT sxMaxExtent; SHORT sCaretSlopeRise; SHORT sCaretSlopeRun; SHORT sCaretOffset; SHORT sReserved1; SHORT sReserved2; SHORT sReserved3; SHORT sReserved4; SHORT sMetricDataFormat; USHORT usNumberOfHMetrics;} HHEA, *PHHEA;
//
// vhea table
//
typedef struct _VHEA { DWORD dwVersion; SHORT sAscender; SHORT sDescender; SHORT sLineGap; USHORT usAdvanceHightMax; SHORT sMinTopSideBearing; SHORT sMinBottomSideBearing; SHORT syMaxExtent; SHORT sCaretSlopeRise; SHORT sCaretSlopeRun; SHORT sCaretOffset; SHORT sReserved1; SHORT sReserved2; SHORT sReserved3; SHORT sReserved4; SHORT sMetricDataFormat; USHORT usNumberOfVMetrics;} VHEA, *PVHEA;
//
// hmtx table
//
typedef struct _HMTX { USHORT usAdvanceWidth; SHORT sLeftSideBearing;} HMTX, *PHMTX;
//
// vmtx table
//
typedef struct _VMTX { USHORT usAdvanceWidth; SHORT sTopSideBearing;} VMTX, *PVMTX;
//
// glyf table
//
typedef struct _GLYF { SHORT numberOfContours; SHORT xMin; SHORT yMin; SHORT xMax; SHORT yMax;} GLYF, *PGLYF;
//
// Composite glyph description
//
// SHORT -1
//
#define COMPONENTCTRCOUNT -1
typedef struct _CGLYF { SHORT flags; SHORT glyphIndex; SHORT argument1; SHORT argument2;} CGLYF, *PCGLYF;
typedef struct _CGLYF_BYTE { SHORT flags; SHORT glyphIndex; BYTE argument1; BYTE argument2;} CGLYF_BYTE, *PCGLYF_BYTE;
//
// Format 1 Class 1 or 2 is used to download TrueType font.
// Now hhea, hmtx, vhea, vmtx are not necessary.
//
typedef enum TagID { TagID_First = 0, TagID_cvt = 0, TagID_fpgm, TagID_gdir, // Empty table. This is a placeholder for the table that printer
// will allocate to store downloaded charactres.
TagID_head, TagID_maxp, TagID_perp,
TagID_hhea, TagID_hmtx, TagID_vhea, TagID_vmtx,
TagID_loca, TagID_glyf, TagID_os2,
TagID_MAX, TagID_Header = TagID_vmtx + 1};
typedef enum TTTag { TTTag_cvt = ' tvc', //0
TTTag_fpgm = 'mgpf', //1
TTTag_gdir = 'ridg', //2
TTTag_head = 'daeh', //3
TTTag_maxp = 'pxam', //4
TTTag_perp = 'perp', //5
TTTag_hhea = 'aehh', //6
TTTag_hmtx = 'xtmh', //7
TTTag_vhea = 'aehv', //8
TTTag_vmtx = 'xtmv', //9
TTTag_loca = 'acol', //10
TTTag_glyf = 'fylg', //11
TTTag_os2 = '2/SO', //12
TTTag_ttcf = 'fctt', //13
TTTag_INVALID = 0xFFFFFFFF};
class XLTrueType#if DBG
: public XLDebug#endif
{ SIGNATURE ('xltt')
public:
XLTrueType:: XLTrueType(VOID);
XLTrueType:: ~XLTrueType(VOID);
HRESULT OpenTTFile(FONTOBJ *pfo); HRESULT CloseTTFile(VOID);
HRESULT SameFont(FONTOBJ* pfo);
HRESULT IsTTC(VOID); HRESULT IsVertical(VOID); HRESULT IsDBCSFont(VOID); HRESULT GetHeader(PTTHEADER *pHeader); DWORD GetSizeOfTable(TTTag tag); HRESULT GetTableDir(TTTag tag, PVOID *pTable); HRESULT GetTable(TTTag tag, PVOID *pTable, PDWORD pdwSize); DWORD GetNumOfTag(VOID); HRESULT TagAndID(DWORD *pdwID, TTTag *ptag); HRESULT GetGlyphData(HGLYPH hGlyph, PBYTE *ppubGlyphData, PDWORD pdwGlyphDataSize); HRESULT GetHMTXData(HGLYPH hGlyph, PUSHORT pusAdvanceWidth, PSHORT psLeftSideBearing); HRESULT GetVMTXData(HGLYPH hGlyph, PUSHORT pusAdvanceWidth, PSHORT psTopSideBearing, PSHORT psLeftSideBearing); HRESULT GetTypoDescender(VOID);
#if DBG
VOID SetDbgLevel(DWORD dwLevel);#endif
private: DWORD m_dwFlags; FONTOBJ *m_pfo; PVOID m_pTTFile; ULONG m_ulFileSize;
PTTHEADER m_pTTHeader; USHORT m_usNumTables; PTTDIR m_pTTDirHead;
DWORD m_dwNumTag; DWORD m_dwNumGlyph; PTTDIR m_pTTDir[TagID_MAX];
DWORD m_dwNumOfHMetrics; DWORD m_dwNumOfVMetrics;
HRESULT ParseTTDir(VOID);};
//
// XLTrueType.m_dwFlags
//
#define XLTT_TTC 0x00000001 // Font is TTC.
#define XLTT_SHORT_OFFSET_TO_LOC 0x00000002 // Short offset to loca table
#define XLTT_VERTICAL_FONT 0x00000004 // Font is a vertial font.
#define XLTT_DIR_PARSED 0x80000000 // The table directory is
// parsed.
#endif // _XLTT_H_
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