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gdi32: Implement GetKerningPairs for TrueType fonts.

This commit is contained in:
Dmitry Timoshkov 2006-09-21 00:18:51 +09:00 committed by Alexandre Julliard
parent 84a6330690
commit ce6d4c72ac
3 changed files with 307 additions and 10 deletions
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80
dlls/gdi/font.c
View File

@ -2514,11 +2514,68 @@ BOOL WINAPI CreateScalableFontResourceW( DWORD fHidden,
* GetKerningPairsA (GDI32.@)
*/
DWORD WINAPI GetKerningPairsA( HDC hDC, DWORD cPairs,
LPKERNINGPAIR lpKerningPairs )
LPKERNINGPAIR kern_pairA )
{
return GetKerningPairsW( hDC, cPairs, lpKerningPairs );
}
INT charset;
CHARSETINFO csi;
CPINFO cpi;
DWORD i, total_kern_pairs, kern_pairs_copied = 0;
KERNINGPAIR *kern_pairW;
if (!cPairs && kern_pairA)
{
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
charset = GetTextCharset(hDC);
if (!TranslateCharsetInfo((DWORD *)charset, &csi, TCI_SRCCHARSET))
{
FIXME("Can't find codepage for charset %d\n", charset);
return 0;
}
if (!GetCPInfo(csi.ciACP, &cpi))
{
FIXME("Can't find codepage %u info\n", csi.ciACP);
return 0;
}
TRACE("charset %d => codepage %u\n", charset, csi.ciACP);
total_kern_pairs = GetKerningPairsW(hDC, 0, NULL);
if (!total_kern_pairs) return 0;
kern_pairW = HeapAlloc(GetProcessHeap(), 0, total_kern_pairs * sizeof(*kern_pairW));
GetKerningPairsW(hDC, total_kern_pairs, kern_pairW);
for (i = 0; i < total_kern_pairs; i++)
{
char first, second;
if (!WideCharToMultiByte(csi.ciACP, 0, &kern_pairW[i].wFirst, 1, &first, 1, NULL, NULL))
continue;
if (!WideCharToMultiByte(csi.ciACP, 0, &kern_pairW[i].wSecond, 1, &second, 1, NULL, NULL))
continue;
if (first == cpi.DefaultChar[0] || second == cpi.DefaultChar[0])
continue;
if (kern_pairA)
{
if (kern_pairs_copied >= cPairs) break;
kern_pairA->wFirst = (BYTE)first;
kern_pairA->wSecond = (BYTE)second;
kern_pairA->iKernAmount = kern_pairW[i].iKernAmount;
kern_pairA++;
}
kern_pairs_copied++;
}
HeapFree(GetProcessHeap(), 0, kern_pairW);
return kern_pairs_copied;
}
/*************************************************************************
* GetKerningPairsW (GDI32.@)
@ -2526,15 +2583,18 @@ DWORD WINAPI GetKerningPairsA( HDC hDC, DWORD cPairs,
DWORD WINAPI GetKerningPairsW( HDC hDC, DWORD cPairs,
LPKERNINGPAIR lpKerningPairs )
{
unsigned int i;
FIXME("(%p,%ld,%p): almost empty stub!\n", hDC, cPairs, lpKerningPairs);
DC *dc = DC_GetDCPtr(hDC);
DWORD ret = 0;
if(!lpKerningPairs) /* return the number of kerning pairs */
return 0;
TRACE("(%p,%ld,%p)\n", hDC, cPairs, lpKerningPairs);
for (i = 0; i < cPairs; i++)
lpKerningPairs[i].iKernAmount = 0;
return 0;
if (!dc) return 0;
if (dc->gdiFont)
ret = WineEngGetKerningPairs(dc->gdiFont, cPairs, lpKerningPairs);
GDI_ReleaseObj(hDC);
return ret;
}
/*************************************************************************

236
dlls/gdi/freetype.c
View File

@ -2,6 +2,7 @@
* FreeType font engine interface
*
* Copyright 2001 Huw D M Davies for CodeWeavers.
* Copyright 2006 Dmitry Timoshkov for CodeWeavers.
*
* This file contains the WineEng* functions.
*
@ -134,6 +135,7 @@ MAKE_FUNCPTR(FT_Vector_Transform);
static void (*pFT_Library_Version)(FT_Library,FT_Int*,FT_Int*,FT_Int*);
static FT_Error (*pFT_Load_Sfnt_Table)(FT_Face,FT_ULong,FT_Long,FT_Byte*,FT_ULong*);
static FT_ULong (*pFT_Get_First_Char)(FT_Face,FT_UInt*);
static FT_ULong (*pFT_Get_Next_Char)(FT_Face,FT_ULong,FT_UInt*);
static FT_TrueTypeEngineType (*pFT_Get_TrueType_Engine_Type)(FT_Library);
#ifdef HAVE_FREETYPE_FTWINFNT_H
MAKE_FUNCPTR(FT_Get_WinFNT_Header);
@ -268,6 +270,8 @@ struct tagGdiFont {
SHORT yMax;
SHORT yMin;
OUTLINETEXTMETRICW *potm;
DWORD total_kern_pairs;
KERNINGPAIR *kern_pairs;
FONTSIGNATURE fs;
GdiFont base_font;
struct list child_fonts;
@ -1652,6 +1656,7 @@ BOOL WineEngInit(void)
pFT_Library_Version = wine_dlsym(ft_handle, "FT_Library_Version", NULL, 0);
pFT_Load_Sfnt_Table = wine_dlsym(ft_handle, "FT_Load_Sfnt_Table", NULL, 0);
pFT_Get_First_Char = wine_dlsym(ft_handle, "FT_Get_First_Char", NULL, 0);
pFT_Get_Next_Char = wine_dlsym(ft_handle, "FT_Get_Next_Char", NULL, 0);
pFT_Get_TrueType_Engine_Type = wine_dlsym(ft_handle, "FT_Get_TrueType_Engine_Type", NULL, 0);
#ifdef HAVE_FREETYPE_FTWINFNT_H
pFT_Get_WinFNT_Header = wine_dlsym(ft_handle, "FT_Get_WinFNT_Header", NULL, 0);
@ -1938,6 +1943,8 @@ static GdiFont alloc_font(void)
ret->gmsize * sizeof(*ret->gm));
ret->potm = NULL;
ret->font_desc.matrix.eM11 = ret->font_desc.matrix.eM22 = 1.0;
ret->total_kern_pairs = (DWORD)-1;
ret->kern_pairs = NULL;
list_init(&ret->hfontlist);
list_init(&ret->child_fonts);
return ret;
@ -1966,6 +1973,7 @@ static void free_font(GdiFont font)
}
if (font->ft_face) pFT_Done_Face(font->ft_face);
HeapFree(GetProcessHeap(), 0, font->kern_pairs);
HeapFree(GetProcessHeap(), 0, font->potm);
HeapFree(GetProcessHeap(), 0, font->name);
HeapFree(GetProcessHeap(), 0, font->gm);
@ -4096,6 +4104,228 @@ BOOL WINAPI GetRasterizerCaps( LPRASTERIZER_STATUS lprs, UINT cbNumBytes)
return TRUE;
}
/*************************************************************************
* Kerning support for TrueType fonts
*/
#define MS_KERN_TAG MS_MAKE_TAG('k', 'e', 'r', 'n')
struct TT_kern_table
{
USHORT version;
USHORT nTables;
};
struct TT_kern_subtable
{
USHORT version;
USHORT length;
union
{
USHORT word;
struct
{
USHORT horizontal : 1;
USHORT minimum : 1;
USHORT cross_stream: 1;
USHORT override : 1;
USHORT reserved1 : 4;
USHORT format : 8;
} bits;
} coverage;
};
struct TT_format0_kern_subtable
{
USHORT nPairs;
USHORT searchRange;
USHORT entrySelector;
USHORT rangeShift;
};
struct TT_kern_pair
{
USHORT left;
USHORT right;
short value;
};
static DWORD parse_format0_kern_subtable(GdiFont font,
const struct TT_format0_kern_subtable *tt_f0_ks,
const USHORT *glyph_to_char,
KERNINGPAIR *kern_pair, DWORD cPairs)
{
USHORT i, nPairs;
const struct TT_kern_pair *tt_kern_pair;
TRACE("font height %ld, units_per_EM %d\n", font->ppem, font->ft_face->units_per_EM);
nPairs = GET_BE_WORD(tt_f0_ks->nPairs);
TRACE("nPairs %u, searchRange %u, entrySelector %u, rangeShift %u\n",
nPairs, GET_BE_WORD(tt_f0_ks->searchRange),
GET_BE_WORD(tt_f0_ks->entrySelector), GET_BE_WORD(tt_f0_ks->rangeShift));
if (!kern_pair || !cPairs)
return nPairs;
tt_kern_pair = (const struct TT_kern_pair *)(tt_f0_ks + 1);
nPairs = min(nPairs, cPairs);
for (i = 0; i < nPairs; i++)
{
kern_pair->wFirst = glyph_to_char[GET_BE_WORD(tt_kern_pair[i].left)];
kern_pair->wSecond = glyph_to_char[GET_BE_WORD(tt_kern_pair[i].right)];
kern_pair->iKernAmount = MulDiv((short)GET_BE_WORD(tt_kern_pair[i].value), font->ppem, font->ft_face->units_per_EM);
TRACE("left %u right %u value %d\n",
kern_pair->wFirst, kern_pair->wSecond, kern_pair->iKernAmount);
kern_pair++;
}
TRACE("copied %u entries\n", nPairs);
return nPairs;
}
DWORD WineEngGetKerningPairs(GdiFont font, DWORD cPairs, KERNINGPAIR *kern_pair)
{
DWORD length;
void *buf;
const struct TT_kern_table *tt_kern_table;
const struct TT_kern_subtable *tt_kern_subtable;
USHORT i, nTables;
USHORT *glyph_to_char;
if (font->total_kern_pairs != (DWORD)-1)
{
if (cPairs && kern_pair)
{
cPairs = min(cPairs, font->total_kern_pairs);
memcpy(kern_pair, font->kern_pairs, cPairs * sizeof(*kern_pair));
return cPairs;
}
return font->total_kern_pairs;
}
font->total_kern_pairs = 0;
length = WineEngGetFontData(font, MS_KERN_TAG, 0, NULL, 0);
if (length == GDI_ERROR)
{
TRACE("no kerning data in the font\n");
return 0;
}
buf = HeapAlloc(GetProcessHeap(), 0, length);
if (!buf)
{
WARN("Out of memory\n");
return 0;
}
WineEngGetFontData(font, MS_KERN_TAG, 0, buf, length);
/* build a glyph index to char code map */
glyph_to_char = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(USHORT) * 65536);
if (!glyph_to_char)
{
WARN("Out of memory allocating a glyph index to char code map\n");
HeapFree(GetProcessHeap(), 0, buf);
return 0;
}
if (font->ft_face->charmap->encoding == FT_ENCODING_UNICODE && pFT_Get_First_Char)
{
FT_UInt glyph_code;
FT_ULong char_code;
glyph_code = 0;
char_code = pFT_Get_First_Char(font->ft_face, &glyph_code);
TRACE("face encoding FT_ENCODING_UNICODE, number of glyphs %ld, first glyph %u, first char %lu\n",
font->ft_face->num_glyphs, glyph_code, char_code);
while (glyph_code)
{
/*TRACE("Char %04lX -> Index %u%s\n", char_code, glyph_code, glyph_to_char[glyph_code] ? " !" : "" );*/
/* FIXME: This doesn't match what Windows does: it does some fancy
* things with duplicate glyph index to char code mappings, while
* we just avoid overriding existing entries.
*/
if (glyph_code <= 65535 && !glyph_to_char[glyph_code])
glyph_to_char[glyph_code] = (USHORT)char_code;
char_code = pFT_Get_Next_Char(font->ft_face, char_code, &glyph_code);
}
}
else
{
ULONG n;
FIXME("encoding %u not supported\n", font->ft_face->charmap->encoding);
for (n = 0; n <= 65535; n++)
glyph_to_char[n] = (USHORT)n;
}
tt_kern_table = buf;
nTables = GET_BE_WORD(tt_kern_table->nTables);
TRACE("version %u, nTables %u\n",
GET_BE_WORD(tt_kern_table->version), nTables);
tt_kern_subtable = (const struct TT_kern_subtable *)(tt_kern_table + 1);
for (i = 0; i < nTables; i++)
{
struct TT_kern_subtable tt_kern_subtable_copy;
tt_kern_subtable_copy.version = GET_BE_WORD(tt_kern_subtable->version);
tt_kern_subtable_copy.length = GET_BE_WORD(tt_kern_subtable->length);
tt_kern_subtable_copy.coverage.word = GET_BE_WORD(tt_kern_subtable->coverage.word);
TRACE("version %u, length %u, coverage %u, subtable format %u\n",
tt_kern_subtable_copy.version, tt_kern_subtable_copy.length,
tt_kern_subtable_copy.coverage.word, tt_kern_subtable_copy.coverage.bits.format);
/* According to the TrueType specification this is the only format
* that will be properly interpreted by Windows and OS/2
*/
if (tt_kern_subtable_copy.coverage.bits.format == 0)
{
DWORD new_chunk, old_total = font->total_kern_pairs;
new_chunk = parse_format0_kern_subtable(font, (const struct TT_format0_kern_subtable *)(tt_kern_subtable + 1),
glyph_to_char, NULL, 0);
font->total_kern_pairs += new_chunk;
if (!font->kern_pairs)
font->kern_pairs = HeapAlloc(GetProcessHeap(), 0,
font->total_kern_pairs * sizeof(*font->kern_pairs));
else
font->kern_pairs = HeapReAlloc(GetProcessHeap(), 0, font->kern_pairs,
font->total_kern_pairs * sizeof(*font->kern_pairs));
parse_format0_kern_subtable(font, (const struct TT_format0_kern_subtable *)(tt_kern_subtable + 1),
glyph_to_char, font->kern_pairs + old_total, new_chunk);
}
else
TRACE("skipping kerning table format %u\n", tt_kern_subtable_copy.coverage.bits.format);
tt_kern_subtable = (const struct TT_kern_subtable *)((const char *)tt_kern_subtable + tt_kern_subtable_copy.length);
}
HeapFree(GetProcessHeap(), 0, glyph_to_char);
HeapFree(GetProcessHeap(), 0, buf);
if (cPairs && kern_pair)
{
cPairs = min(cPairs, font->total_kern_pairs);
memcpy(kern_pair, font->kern_pairs, cPairs * sizeof(*kern_pair));
return cPairs;
}
return font->total_kern_pairs;
}
#else /* HAVE_FREETYPE */
@ -4233,4 +4463,10 @@ BOOL WINAPI GetRasterizerCaps( LPRASTERIZER_STATUS lprs, UINT cbNumBytes)
return TRUE;
}
DWORD WineEngGetKerningPairs(GdiFont font, DWORD cPairs, KERNINGPAIR *kern_pair)
{
ERR("called but we don't have FreeType\n");
return 0;
}
#endif /* HAVE_FREETYPE */

1
dlls/gdi/gdi_private.h
View File

@ -376,6 +376,7 @@ extern DWORD WineEngGetGlyphIndices(GdiFont font, LPCWSTR lpstr, INT count,
extern DWORD WineEngGetGlyphOutline(GdiFont, UINT glyph, UINT format,
LPGLYPHMETRICS, DWORD buflen, LPVOID buf,
const MAT2*);
extern DWORD WineEngGetKerningPairs(GdiFont, DWORD, KERNINGPAIR *);
extern BOOL WineEngGetLinkedHFont(DC *dc, WCHAR c, HFONT *new_hfont, UINT *glyph);
extern UINT WineEngGetOutlineTextMetrics(GdiFont, UINT, LPOUTLINETEXTMETRICW);
extern UINT WineEngGetTextCharsetInfo(GdiFont font, LPFONTSIGNATURE fs, DWORD flags);