Camelot: FontKerningPairsCache Class Reference

Member Function Documentation

FontKerningPairsCache::CC_DECLARE_MEMDUMP ( FontKerningPairsCache ) [private]

MILLIPOINT FontKerningPairsCache::GetCharsKerning	(	wxDC *	pDC,
		WCHAR	chLeft,
		WCHAR	chRight,
		CharDescription &	FontDesc
	)	`[static]`

Get the kern between two chars of a font Note: The kern pairs are cached (see FontKerningPairsCacheEntry::GetCharsKerning).

Author:: Jonathan_Payne (Xara Group Ltd) <camelotdev@xara.com>

Date:: 16/20/2000

Parameters:

pDC

= a pointer to a device context [INPUTS] chLeft = a character code of the left char of a kerning pair chRight = a character code of the right char of a kerning pair FontDesc = a font description

Returns:: Kern in millipoints (or zero if no kern or error)

Definition at line 1166 of file fontbase.cpp.

01168 {
01169     // TRACEUSER("wuerthne", _T("GetCharsKerning %04x %04x"), chLeft, chRight);
01170     ERROR2IF(pDC==NULL, 0, "FontKerningPairsCache::GetCharsKerning() - pDC==NULL");
01171     ERROR2IF(FontDesc.GetCharCode() != FONTEMCHAR, FALSE,
01172         "FontKerningPairsCache::GetCharsKerning() - FontDesc char should be 'FONTEMCHAR'");
01173 #ifndef DISABLE_TEXT_RENDERING
01174     // find out whether the font is in the cache (and if so which entry)
01175     INT32 CacheEntry = 0;
01176     while (CacheEntry < NUMENTRIES && m_FontKerningPairsCacheData[CacheEntry].GetFontDesc() != FontDesc)
01177         CacheEntry++;
01178 
01179     if (CacheEntry >= NUMENTRIES)
01180     {
01181         // TRACEUSER("wuerthne", _T("did not find cache entry, so allocate new one"));
01182         // the font is not in the cache, so throw out a random cache entry and prepare
01183         // the cache entry so we can start caching the kerning data for the new font
01184         CacheEntry = rand() % NUMENTRIES;
01185         m_FontKerningPairsCacheData[CacheEntry].Reinitialise(FontDesc);
01186     }
01187     return m_FontKerningPairsCacheData[CacheEntry].GetCharsKerning(chLeft, chRight);
01188 #else
01189     return 0;
01190 #endif
01191 }

Member Data Documentation

Generated on Sat Nov 10 03:54:29 2007 for Camelot by

1.4.4


Static Public Member Functions
static MILLIPOINT	GetCharsKerning (wxDC *pDC, WCHAR chLeft, WCHAR chRight, CharDescription &FontDesc)
	Get the kern between two chars of a font Note: The kern pairs are cached (see FontKerningPairsCacheEntry::GetCharsKerning).
Protected Types
enum	CacheInfo { NUMENTRIES = 3 }
Static Protected Attributes
static FontKerningPairsCacheEntry	m_FontKerningPairsCacheData [NUMENTRIES]
Private Member Functions
	CC_DECLARE_MEMDUMP (FontKerningPairsCache)

FontKerningPairsCache Class Reference

Static Public Member Functions

Protected Types

Static Protected Attributes

Private Member Functions

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