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Sweden-Number/dlls/wineps/truetype.c

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/*******************************************************************************
* TrueType font-related functions for Wine PostScript driver. Currently just
* uses FreeType to read font metrics.
*
* Copyright 2001 Ian Pilcher
*
*/
#include "config.h"
#ifdef HAVE_FREETYPE
/*
* These stupid #ifdefs should work for FreeType 2.0.1 and 2.0.2. Beyond that
* is anybody's guess.
*/
#ifdef HAVE_FREETYPE_FREETYPE_H
#include <freetype/freetype.h>
#endif
#ifdef HAVE_FREETYPE_FTGLYPH_H
#include <freetype/ftglyph.h>
#endif
#ifdef HAVE_FREETYPE_TTTABLES_H
#include <freetype/tttables.h>
#endif
#ifdef HAVE_FREETYPE_FTNAMES_H
#include <freetype/ftnames.h>
#endif
#ifdef HAVE_FREETYPE_FTSNAMES_H
#include <freetype/ftsnames.h>
#endif
#ifdef HAVE_FREETYPE_TTNAMEID_H
#include <freetype/ttnameid.h>
#endif
#include <sys/types.h>
#include <dirent.h>
#include <string.h>
#include <stdio.h>
#include "winnt.h"
#include "winreg.h"
#include "psdrv.h"
#include "debugtools.h"
#include "heap.h"
DEFAULT_DEBUG_CHANNEL(psdrv);
#define REQUIRED_FACE_FLAGS ( FT_FACE_FLAG_SCALABLE | \
FT_FACE_FLAG_HORIZONTAL | \
FT_FACE_FLAG_SFNT | \
FT_FACE_FLAG_GLYPH_NAMES )
static FT_Library library;
static FT_Face face;
static FT_CharMap charmap;
static TT_Header *head;
static TT_Postscript *post;
static TT_OS2 *os2;
static TT_HoriHeader *hhea;
/*******************************************************************************
*
* FindCharMap
*
* Sets charmap and points afm->EncodingScheme to encoding name (in driver
* heap). Leaves both uninitialized if font contains no Windows encoding.
*
* Returns FALSE to indicate memory allocation error.
*
*/
static const char *encoding_names[7] =
{
"WindowsSymbol", /* TT_MS_ID_SYMBOL_CS */
"WindowsUnicode", /* TT_MS_ID_UNICODE_CS */
"WindowsShiftJIS", /* TT_MS_ID_SJIS */
"WindowsPRC", /* TT_MS_ID_GB2312 */
"WindowsBig5", /* TT_MS_ID_BIG_5 */
"WindowsWansung", /* TT_MS_ID_WANSUNG */
"WindowsJohab" /* TT_MS_ID_JOHAB */
};
static BOOL FindCharMap(AFM *afm)
{
FT_Int i;
FT_Error error;
charmap = NULL;
for (i = 0; i < face->num_charmaps; ++i)
{
if (face->charmaps[i]->platform_id != TT_PLATFORM_MICROSOFT)
continue;
if (face->charmaps[i]->encoding_id == TT_MS_ID_UNICODE_CS)
{
charmap = face->charmaps[i];
break;
}
if (charmap == NULL)
charmap = face->charmaps[i];
}
if (charmap == NULL)
return TRUE;
error = FT_Set_Charmap(face, charmap);
if (error != FT_Err_Ok)
{
ERR("%s returned %i\n", "FT_Set_CharMap", error);
return FALSE;
}
if (charmap->encoding_id < 7)
{
afm->EncodingScheme = HEAP_strdupA(PSDRV_Heap, 0,
encoding_names[charmap->encoding_id]);
if (afm->EncodingScheme == NULL)
return FALSE;
}
else
{
afm->EncodingScheme = HeapAlloc(PSDRV_Heap, 0, /* encoding_id */
sizeof("WindowsUnknown65535")); /* is a UShort */
if (afm->EncodingScheme == NULL)
return FALSE;
sprintf(afm->EncodingScheme, "%s%u", "WindowsUnknown",
charmap->encoding_id);
}
return TRUE;
}
/*******************************************************************************
* NameTableString
*
* Converts a name table string to a null-terminated character string. The
* space for the character string is allocated from the driver heap.
*
* This function handles only platform_id = 3 (TT_PLATFORM_MICROSOFT) -- 16-bit
* big-endian strings. It also only handles ASCII character codes (< 128).
*
* This function will set *sz to NULL if it cannot parse the string, but it
* will only return FALSE in the event of an unexpected error (memory
* allocation failure).
*
*/
static BOOL NameTableString(LPSTR *sz, const FT_SfntName *name)
{
FT_UShort i, len, *ws;
LPSTR s;
if (name->platform_id != TT_PLATFORM_MICROSOFT)
{
ERR("Unsupported encoding %i\n", name->platform_id);
return FALSE; /* should never get here */
}
len = name->string_len / 2;
s = *sz = HeapAlloc(PSDRV_Heap, 0, len + 1);
if (s == NULL)
return FALSE;
ws = (FT_UShort *)(name->string);
for (i = 0; i < len; ++i, ++s, ++ws)
{
FT_UShort wc = *ws;
#ifndef WORDS_BIGENDIAN
wc = (wc >> 8) | (wc << 8);
#endif
if (wc > 127)
{
WARN("Non-ASCII character 0x%.4x\n", wc);
HeapFree(PSDRV_Heap, 0, *sz);
*sz = NULL;
return TRUE;
}
*s = (CHAR)wc;
}
*s = '\0';
return TRUE;
}
/*******************************************************************************
* ReadNameTable
*
* Reads various font names from the TrueType 'NAME' table. Currently looks
* for U.S. English names only,
*
* May leave a pointer uninitialized if the desired string is not present;
* returns FALSE only in the event of an unexpected error.
*
*/
static BOOL ReadNameTable(AFM *afm)
{
FT_UInt numStrings, stringIndex;
FT_SfntName name;
FT_Error error;
numStrings = FT_Get_Sfnt_Name_Count(face);
for (stringIndex = 0; stringIndex < numStrings; ++stringIndex)
{
error = FT_Get_Sfnt_Name(face, stringIndex, &name);
if (error != FT_Err_Ok)
{
ERR("%s returned %i\n", "FT_Get_Sfnt_Name", error);
return FALSE;
}
/* FIXME - Handle other languages? */
if (name.language_id != TT_MS_LANGID_ENGLISH_UNITED_STATES ||
name.platform_id != charmap->platform_id ||
name.encoding_id != charmap->encoding_id)
continue;
switch (name.name_id)
{
case TT_NAME_ID_FONT_FAMILY:
if (NameTableString(&(afm->FamilyName), &name) == FALSE)
return FALSE;
break;
case TT_NAME_ID_FULL_NAME:
if (NameTableString(&(afm->FullName), &name) == FALSE)
return FALSE;
break;
case TT_NAME_ID_PS_NAME:
if (NameTableString(&(afm->FontName), &name) == FALSE)
return FALSE;
break;
}
}
return TRUE;
}
/*******************************************************************************
* FreeAFM
*
* Frees an AFM and all subsidiary objects. For this function to work
* properly, the AFM must have been allocated with HEAP_ZERO_MEMORY, and the
* UNICODEVECTOR and it's associated array of UNICODEGLYPHs must have been
* allocated as a single object.
*/
static void FreeAFM(AFM *afm)
{
if (afm->FontName != NULL)
HeapFree(PSDRV_Heap, 0, afm->FontName);
if (afm->FullName != NULL)
HeapFree(PSDRV_Heap, 0, afm->FullName);
if (afm->FamilyName != NULL)
HeapFree(PSDRV_Heap, 0, afm->FamilyName);
if (afm->EncodingScheme != NULL)
HeapFree(PSDRV_Heap, 0, afm->EncodingScheme);
if (afm->Metrics != NULL)
HeapFree(PSDRV_Heap, 0, afm->Metrics);
HeapFree(PSDRV_Heap, 0, afm);
}
/*******************************************************************************
* PSUnits
*
* Convert TrueType font units (relative to font em square) to PostScript
* units. This is defined as a macro, so it can handle different TrueType
* data types as inputs.
*
*/
#define PSUnits(x) (((float)(x)) * 1000.0 / ((float)(head->Units_Per_EM)))
/*******************************************************************************
* ReadMetricsTables
*
* Reads basic font metrics from the 'head', 'post', and 'OS/2' tables.
* Returns FALSE if any table is missing.
*
*/
static BOOL ReadMetricsTables(AFM *afm)
{
head = FT_Get_Sfnt_Table(face, ft_sfnt_head);
post = FT_Get_Sfnt_Table(face, ft_sfnt_post);
hhea = FT_Get_Sfnt_Table(face, ft_sfnt_hhea);
os2 = FT_Get_Sfnt_Table(face, ft_sfnt_os2);
if (head == NULL || post == NULL || hhea == NULL || os2 == NULL)
return FALSE;
if (os2->version == 0xffff) /* Old Macintosh font */
return FALSE;
afm->Weight = os2->usWeightClass;
afm->ItalicAngle = ((float)(post->italicAngle)) / 65536.0;
afm->IsFixedPitch = (post->isFixedPitch == 0) ? FALSE : TRUE;
afm->UnderlinePosition = PSUnits(post->underlinePosition);
afm->UnderlineThickness = PSUnits(post->underlineThickness);
afm->FontBBox.llx = PSUnits(head->xMin);
afm->FontBBox.lly = PSUnits(head->yMin);
afm->FontBBox.urx = PSUnits(head->xMax);
afm->FontBBox.ury = PSUnits(head->yMax);
/* CapHeight & XHeight set by ReadCharMetrics */
afm->Ascender = PSUnits(os2->sTypoAscender);
afm->Descender = PSUnits(os2->sTypoDescender);
afm->FullAscender = afm->FontBBox.ury; /* get rid of this */
afm->WinMetrics.usUnitsPerEm = head->Units_Per_EM;
afm->WinMetrics.sAscender = hhea->Ascender;
afm->WinMetrics.sDescender = hhea->Descender;
afm->WinMetrics.sLineGap = hhea->Line_Gap;
afm->WinMetrics.sTypoAscender = os2->sTypoAscender;
afm->WinMetrics.sTypoDescender = os2->sTypoDescender;
afm->WinMetrics.sTypoLineGap = os2->sTypoLineGap;
afm->WinMetrics.usWinAscent = os2->usWinAscent;
afm->WinMetrics.usWinDescent = os2->usWinDescent;
afm->WinMetrics.sAvgCharWidth = os2->xAvgCharWidth;
return TRUE;
}
/*******************************************************************************
* ReadCharMetrics
*
* Reads metrics for each glyph in a TrueType font. Since FreeAFM will try to
* free afm->Metrics and afm->Encoding if they are non-NULL, don't free them
* in the event of an error.
*
*/
static BOOL ReadCharMetrics(AFM *afm)
{
FT_ULong charcode, index;
/*
* There does not seem to be an easy way to get the number of characters
* in an encoding out of a TrueType font.
*/
for (charcode = 0, index = 0; charcode < 65536; ++charcode)
{
if (FT_Get_Char_Index(face, charcode) != 0)
++index;
}
afm->NumofMetrics = index;
afm->Metrics = HeapAlloc(PSDRV_Heap, 0, index * sizeof(AFMMETRICS));
if (afm->Metrics == NULL)
return FALSE;
for (charcode = 0, index = 0; charcode <= 65536; ++charcode)
{
FT_UInt glyph_index = FT_Get_Char_Index(face, charcode);
FT_Error error;
FT_Glyph glyph;
FT_BBox bbox;
char buffer[256];
if (glyph_index == 0)
continue;
error = FT_Load_Glyph(face, glyph_index, FT_LOAD_NO_SCALE |
FT_LOAD_IGNORE_TRANSFORM | FT_LOAD_LINEAR_DESIGN);
if (error != FT_Err_Ok)
{
ERR("%s returned %i\n", "FT_Load_Glyph", error);
return FALSE;
}
error = FT_Get_Glyph(face->glyph, &glyph);
if (error != FT_Err_Ok)
{
ERR("%s returned %i\n", "FT_Get_Glyph", error);
return FALSE;
}
FT_Glyph_Get_CBox(glyph, ft_glyph_bbox_unscaled, &bbox);
error = FT_Get_Glyph_Name(face, glyph_index, buffer, 255);
if (error != FT_Err_Ok)
{
ERR("%s returned %i\n", "FT_Get_Glyph_Name", error);
return FALSE;
}
afm->Metrics[index].N = PSDRV_GlyphName(buffer);
if (afm->Metrics[index].N == NULL)
return FALSE;
afm->Metrics[index].C = charcode;
afm->Metrics[index].UV = charcode;
afm->Metrics[index].WX = PSUnits(face->glyph->metrics.horiAdvance);
afm->Metrics[index].B.llx = PSUnits(bbox.xMin);
afm->Metrics[index].B.lly = PSUnits(bbox.yMin);
afm->Metrics[index].B.urx = PSUnits(bbox.xMax);
afm->Metrics[index].B.ury = PSUnits(bbox.yMax);
afm->Metrics[index].L = NULL;
TRACE("Metrics for '%s' WX = %f B = %f,%f - %f,%f\n",
afm->Metrics[index].N->sz, afm->Metrics[index].WX,
afm->Metrics[index].B.llx, afm->Metrics[index].B.lly,
afm->Metrics[index].B.urx, afm->Metrics[index].B.ury);
if (charcode == 0x0048) /* 'H' */
afm->CapHeight = PSUnits(bbox.yMax);
if (charcode == 0x0078) /* 'x' */
afm->XHeight = PSUnits(bbox.yMax);
++index;
}
return TRUE;
}
/*******************************************************************************
* ReadTrueTypeAFM
*
* Fills in AFM structure for opened TrueType font file. Returns FALSE only on
* an unexpected error (memory allocation failure or FreeType error); otherwise
* returns TRUE. Leaves it to the caller (ReadTrueTypeFile) to clean up.
*
*/
static BOOL ReadTrueTypeAFM(AFM *afm)
{
if ((face->face_flags & REQUIRED_FACE_FLAGS) != REQUIRED_FACE_FLAGS)
{
WARN("Font flags do not match requirements\n");
return TRUE;
}
if (FindCharMap(afm) == FALSE)
return FALSE;
if (charmap == NULL)
{
WARN("No Windows encodings in font\n");
return TRUE;
}
TRACE("Using encoding '%s'\n", afm->EncodingScheme);
if (ReadNameTable(afm) == FALSE)
return FALSE;
if (afm->FamilyName == NULL || afm->FullName == NULL ||
afm->FontName == NULL)
{
WARN("Required strings missing from font\n");
return TRUE;
}
if (ReadMetricsTables(afm) == FALSE) /* Non-fatal */
{
WARN("Required metrics tables missing from font\n");
return TRUE;
}
if (ReadCharMetrics(afm) == FALSE)
return FALSE;
/* Can't do this check until character metrics are read */
if (afm->WinMetrics.sAvgCharWidth == 0)
afm->WinMetrics.sAvgCharWidth = PSDRV_CalcAvgCharWidth(afm);
return TRUE;
}
/*******************************************************************************
* ReadTrueTypeFile
*
* Reads PostScript-style font metrics from a TrueType font file. Only returns
* FALSE for unexpected errors (memory allocation, etc.); returns TRUE if it's
* just a bad font file.
*
*/
static BOOL ReadTrueTypeFile(LPCSTR filename)
{
FT_Error error;
AFM *afm;
TRACE("'%s'\n", filename);
afm = HeapAlloc(PSDRV_Heap, HEAP_ZERO_MEMORY, sizeof(AFM));
if (afm == NULL)
return FALSE;
error = FT_New_Face(library, filename, 0, &face);
if (error != FT_Err_Ok)
{
WARN("FreeType error %i opening '%s'\n", error, filename);
HeapFree(PSDRV_Heap, 0, afm);
return TRUE;
}
if (ReadTrueTypeAFM(afm) == FALSE)
{
FreeAFM(afm);
FT_Done_Face(face);
return FALSE;
}
error = FT_Done_Face(face);
if (error != FT_Err_Ok)
{
ERR("%s returned %i\n", "FT_Done_Face", error);
FreeAFM(afm);
return FALSE;
}
if (afm->Metrics == NULL) /* last element to be set */
{
FreeAFM(afm);
return TRUE;
}
if (PSDRV_AddAFMtoList(&PSDRV_AFMFontList, afm) == FALSE)
{
FreeAFM(afm);
return FALSE;
}
return TRUE;
}
/*******************************************************************************
* PSDRV_GetTrueTypeMetrics
*
* Reads PostScript-stype font metrics from TrueType font files in directories
* listed in the [TrueType Font Directories] section of the Wine configuration
* file.
*
* If this function fails, the driver will fail to initialize and the driver
* heap will be destroyed, so it's not necessary to HeapFree everything in
* that event.
*
*/
BOOL PSDRV_GetTrueTypeMetrics(void)
{
CHAR keybuf[256], namebuf[256];
INT i = 0;
FT_Error error;
HKEY hkey;
DWORD type, key_len, name_len;
error = FT_Init_FreeType(&library);
if (error != FT_Err_Ok)
{
ERR("%s returned %i\n", "FT_Init_FreeType", error);
return FALSE;
}
if(RegOpenKeyExA(HKEY_LOCAL_MACHINE, "Software\\Wine\\Wine\\Config\\TrueType Font Directories",
0, KEY_READ, &hkey))
goto no_metrics;
key_len = sizeof(keybuf);
name_len = sizeof(namebuf);
while(!RegEnumValueA(hkey, i++, keybuf, &key_len, NULL, &type, namebuf, &name_len))
{
struct dirent *dent;
DIR *dir;
INT dnlen; /* directory name length */
namebuf[sizeof(namebuf) - 1] = '\0';
dir = opendir(namebuf);
if (dir == NULL)
{
WARN("Error opening directory '%s'\n", namebuf);
continue;
}
dnlen = strlen(namebuf);
namebuf[dnlen] = '/'; /* 2 slashes is OK, 0 is not */
++dnlen;
while ((dent = readdir(dir)) != NULL)
{
INT fnlen; /* file name length */
fnlen = strlen(dent->d_name);
if (fnlen < 5 || strcasecmp(dent->d_name + fnlen - 4, ".ttf") != 0)
{
TRACE("Skipping filename '%s'\n", dent->d_name);
continue;
}
if (dnlen + fnlen + 1 > sizeof(namebuf)) /* allow for '\0' */
{
WARN("Path '%s/%s' is too long\n", namebuf, dent->d_name);
continue;
}
memcpy(namebuf + dnlen, dent->d_name, fnlen + 1);
if (ReadTrueTypeFile(namebuf) == FALSE)
{
ERR("Error reading '%s'\n", namebuf);
closedir(dir);
RegCloseKey(hkey);
FT_Done_FreeType(library);
return FALSE;
}
}
closedir(dir);
/* initialize lengths for new iteration */
key_len = sizeof(keybuf);
name_len = sizeof(namebuf);
}
RegCloseKey(hkey);
no_metrics:
FT_Done_FreeType(library);
return TRUE;
}
#endif /* HAVE_FREETYPE */
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