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fonts: Use the EBLC table to retrieve the ascent of the bitmap font.

This commit is contained in:
Huw Davies 2006-03-21 17:08:56 +00:00 committed by Alexandre Julliard
parent 0994126701
commit 130a0e4f41
2 changed files with 82 additions and 7 deletions
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2
dlls/gdi/tests/gdiobj.c
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@ -235,9 +235,7 @@ static void test_bitmap_font_metrics(void)
{ "MS Serif", FW_NORMAL, 21, 16, 5, 3, 0, 9, 23 },
{ "MS Serif", FW_NORMAL, 27, 21, 6, 3, 0, 12, 27 },
{ "MS Serif", FW_NORMAL, 35, 27, 8, 3, 0, 16, 34 },
#if 0 /* FIXME: enable once the bug in sfnt2fnt is fixed */
{ "Courier", FW_NORMAL, 13, 11, 2, 0, 0, 8, 8 },
#endif
{ "Courier", FW_NORMAL, 16, 13, 3, 0, 0, 9, 9 },
{ "Courier", FW_NORMAL, 20, 16, 4, 0, 0, 12, 12 },
{ "System", FW_BOLD, 16, 13, 3, 3, 0, 7, 15 }

83
tools/sfnt2fnt.c
View File

@ -34,6 +34,7 @@
#include FT_FREETYPE_H
#include FT_SFNT_NAMES_H
#include FT_TRUETYPE_TABLES_H
#include FT_TRUETYPE_TAGS_H
#include "wine/unicode.h"
#include "wine/wingdi16.h"
@ -53,6 +54,45 @@ typedef struct {
DWORD offset;
} CHAR_TABLE_ENTRY;
typedef struct {
DWORD version;
ULONG numSizes;
} eblcHeader_t;
typedef struct {
CHAR ascender;
CHAR descender;
BYTE widthMax;
CHAR caretSlopeNumerator;
CHAR caretSlopeDenominator;
CHAR caretOffset;
CHAR minOriginSB;
CHAR minAdvanceSB;
CHAR maxBeforeBL;
CHAR maxAfterBL;
CHAR pad1;
CHAR pad2;
} sbitLineMetrics_t;
typedef struct {
ULONG indexSubTableArrayOffset;
ULONG indexTableSize;
ULONG numberOfIndexSubTables;
ULONG colorRef;
sbitLineMetrics_t hori;
sbitLineMetrics_t vert;
USHORT startGlyphIndex;
USHORT endGlyphIndex;
BYTE ppemX;
BYTE ppemY;
BYTE bitDepth;
CHAR flags;
} bitmapSizeTable_t;
#define GET_BE_WORD(ptr) MAKEWORD( ((BYTE *)(ptr))[1], ((BYTE *)(ptr))[0] )
#define GET_BE_DWORD(ptr) ((DWORD)MAKELONG( GET_BE_WORD(&((WORD *)(ptr))[1]), \
GET_BE_WORD(&((WORD *)(ptr))[0]) ))
#include "poppack.h"
static const char *output_name;
@ -141,7 +181,7 @@ static int lookup_charset(int enc)
static void fill_fontinfo(FT_Face face, int enc, FILE *fp, int dpi, unsigned char def_char, int avg_width)
{
int ascent, il, ppem, descent, width_bytes = 0, space_size, max_width = 0;
int ascent = 0, il, ppem, descent = 0, width_bytes = 0, space_size, max_width = 0;
FNT_HEADER hdr;
FONTINFO16 fi;
BYTE left_byte, right_byte, byte;
@ -153,6 +193,11 @@ static void fill_fontinfo(FT_Face face, int enc, FILE *fp, int dpi, unsigned cha
const union cptable *cptable;
FT_SfntName sfntname;
TT_OS2 *os2;
FT_ULong needed;
eblcHeader_t *eblc;
bitmapSizeTable_t *size_table;
int num_sizes;
cptable = wine_cp_get_table(enc);
if(!cptable)
error("Can't find codepage %d\n", enc);
@ -165,12 +210,44 @@ static void fill_fontinfo(FT_Face face, int enc, FILE *fp, int dpi, unsigned cha
}
ppem = face->size->metrics.y_ppem;
start = sizeof(FNT_HEADER) + sizeof(FONTINFO16);
needed = 0;
if(FT_Load_Sfnt_Table(face, TTAG_EBLC, 0, NULL, &needed))
error("Can't find EBLC table\n");
eblc = malloc(needed);
FT_Load_Sfnt_Table(face, TTAG_EBLC, 0, (FT_Byte *)eblc, &needed);
num_sizes = GET_BE_DWORD(&eblc->numSizes);
size_table = (bitmapSizeTable_t *)(eblc + 1);
for(i = 0; i < num_sizes; i++)
{
if(size_table->hori.ascender - size_table->hori.descender == ppem)
{
ascent = size_table->hori.ascender;
descent = -size_table->hori.descender;
break;
}
size_table++;
}
/* Versions of fontforge prior to early 2006 have incorrect
ascender values in the eblc table, so we won't find the
correct bitmapSizeTable. In this case use the height of
the Aring glyph instead. */
if(ascent == 0)
{
if(FT_Load_Char(face, 0xc5, FT_LOAD_DEFAULT))
error("Can't find Aring\n");
ascent = face->glyph->metrics.height >> 6;
ascent = face->glyph->metrics.horiBearingY >> 6;
descent = ppem - ascent;
}
free(eblc);
start = sizeof(FNT_HEADER) + sizeof(FONTINFO16);
if(FT_Load_Char(face, 'M', FT_LOAD_DEFAULT))
error("Can't find M\n");
il = ascent - (face->glyph->metrics.height >> 6);