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