qfontdatabase_x11.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include <qplatformdefs.h>

#include <qdatetime.h>
#include <qdebug.h>
#include <qpaintdevice.h>

#include <private/qt_x11_p.h>
#include "qx11info_x11.h"
#include <qdebug.h>

#include <ctype.h>
#include <stdlib.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>

#ifndef QT_NO_FONTCONFIG
#include <ft2build.h>
#include FT_FREETYPE_H
#endif

// from qfont_x11.cpp
extern double qt_pointSize(double pixelSize, int dpi);
extern double qt_pixelSize(double pointSize, int dpi);

static inline void capitalize (char *s)
{
    bool space = true;
    while(*s) {
        if (space)
            *s = toupper(*s);
        space = (*s == ' ');
        ++s;
    }
}


/*
  To regenerate the writingSystems_for_xlfd_encoding table, run
  'util/unicode/x11/makeencodings' and paste the generated
  'encodings.c' here.
*/
// ----- begin of generated code -----

#define make_tag( c1, c2, c3, c4 )                              \
    ((((unsigned int)c1)<<24) | (((unsigned int)c2)<<16) |      \
     (((unsigned int)c3)<<8) | ((unsigned int)c4))

struct XlfdEncoding {
    const char *name;
    int id;
    int mib;
    unsigned int hash1;
    unsigned int hash2;
};

static const XlfdEncoding xlfd_encoding[] = {
    { "iso8859-1", 0, 4, make_tag('i','s','o','8'), make_tag('5','9','-','1') },
    { "iso8859-2", 1, 5, make_tag('i','s','o','8'), make_tag('5','9','-','2') },
    { "iso8859-3", 2, 6, make_tag('i','s','o','8'), make_tag('5','9','-','3') },
    { "iso8859-4", 3, 7, make_tag('i','s','o','8'), make_tag('5','9','-','4') },
    { "iso8859-9", 4, 12, make_tag('i','s','o','8'), make_tag('5','9','-','9') },
    { "iso8859-10", 5, 13, make_tag('i','s','o','8'), make_tag('9','-','1','0') },
    { "iso8859-13", 6, 109, make_tag('i','s','o','8'), make_tag('9','-','1','3') },
    { "iso8859-14", 7, 110, make_tag('i','s','o','8'), make_tag('9','-','1','4') },
    { "iso8859-15", 8, 111, make_tag('i','s','o','8'), make_tag('9','-','1','5') },
    { "hp-roman8", 9, 2004, make_tag('h','p','-','r'), make_tag('m','a','n','8') },
    { "iso8859-5", 10, 8, make_tag('i','s','o','8'), make_tag('5','9','-','5') },
    { "*-cp1251", 11, 2251, 0, make_tag('1','2','5','1') },
    { "koi8-ru", 12, 2084, make_tag('k','o','i','8'), make_tag('8','-','r','u') },
    { "koi8-u", 13, 2088, make_tag('k','o','i','8'), make_tag('i','8','-','u') },
    { "koi8-r", 14, 2084, make_tag('k','o','i','8'), make_tag('i','8','-','r') },
    { "iso8859-7", 15, 10, make_tag('i','s','o','8'), make_tag('5','9','-','7') },
    { "iso8859-8", 16, 85, make_tag('i','s','o','8'), make_tag('5','9','-','8') },
    { "gb18030-0", 17, -114, make_tag('g','b','1','8'), make_tag('3','0','-','0') },
    { "gb18030.2000-0", 18, -113, make_tag('g','b','1','8'), make_tag('0','0','-','0') },
    { "gbk-0", 19, -113, make_tag('g','b','k','-'), make_tag('b','k','-','0') },
    { "gb2312.*-0", 20, 57, make_tag('g','b','2','3'), 0 },
    { "jisx0201*-0", 21, 15, make_tag('j','i','s','x'), 0 },
    { "jisx0208*-0", 22, 63, make_tag('j','i','s','x'), 0 },
    { "ksc5601*-*", 23, 36, make_tag('k','s','c','5'), 0 },
    { "big5hkscs-0", 24, -2101, make_tag('b','i','g','5'), make_tag('c','s','-','0') },
    { "hkscs-1", 25, -2101, make_tag('h','k','s','c'), make_tag('c','s','-','1') },
    { "big5*-*", 26, -2026, make_tag('b','i','g','5'), 0 },
    { "tscii-*", 27, 2028, make_tag('t','s','c','i'), 0 },
    { "tis620*-*", 28, 2259, make_tag('t','i','s','6'), 0 },
    { "iso8859-11", 29, 2259, make_tag('i','s','o','8'), make_tag('9','-','1','1') },
    { "mulelao-1", 30, -4242, make_tag('m','u','l','e'), make_tag('a','o','-','1') },
    { "ethiopic-unicode", 31, 0, make_tag('e','t','h','i'), make_tag('c','o','d','e') },
    { "iso10646-1", 32, 0, make_tag('i','s','o','1'), make_tag('4','6','-','1') },
    { "unicode-*", 33, 0, make_tag('u','n','i','c'), 0 },
    { "*-symbol", 34, 0, 0, make_tag('m','b','o','l') },
    { "*-fontspecific", 35, 0, 0, make_tag('i','f','i','c') },
    { "fontspecific-*", 36, 0, make_tag('f','o','n','t'), 0 },
    { 0, 0, 0, 0, 0 }
};

static const char writingSystems_for_xlfd_encoding[37][39] = {
    // iso8859-1
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-2
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-3
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-4
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-9
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-10
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-13
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-14
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-15
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // hp-roman8
    { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-5
    { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // *-cp1251
    { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // koi8-ru
    { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // koi8-u
    { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // koi8-r
    { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-7
    { 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-8
    { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // gb18030-0
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // gb18030.2000-0
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // gbk-0
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // gb2312.*-0
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // jisx0201*-0
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // jisx0208*-0
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // ksc5601*-*
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 1, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // big5hkscs-0
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // hkscs-1
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // big5*-*
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // tscii-*
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // tis620*-*
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // iso8859-11
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // mulelao-1
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // ethiopic-unicode
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 1 },
    // iso10646-1
    { 0, 1, 1, 1, 1, 1, 1, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
      1, 1, 0, 1, 0, 1, 1, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // unicode-*
    { 0, 1, 1, 1, 1, 1, 1, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
      1, 1, 0, 1, 0, 1, 1, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0 },
    // *-symbol
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 1 },
    // *-fontspecific
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 1 },
    // fontspecific-*
    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0, 0, 0, 0, 0, 0, 0, 1 }

};

// ----- end of generated code -----


const int numEncodings = sizeof(xlfd_encoding) / sizeof(XlfdEncoding) - 1;

int qt_xlfd_encoding_id(const char *encoding)
{
    // qDebug("looking for encoding id for '%s'", encoding);
    int len = strlen(encoding);
    if (len < 4)
        return -1;
    unsigned int hash1 = make_tag(encoding[0], encoding[1], encoding[2], encoding[3]);
    const char *ch = encoding + len - 4;
    unsigned int hash2 = make_tag(ch[0], ch[1], ch[2], ch[3]);

    const XlfdEncoding *enc = xlfd_encoding;
    for (; enc->name; ++enc) {
        if ((enc->hash1 && enc->hash1 != hash1) ||
            (enc->hash2 && enc->hash2 != hash2))
            continue;
        // hashes match, do a compare if strings match
        // the enc->name can contain '*'s we have to interpret correctly
        const char *n = enc->name;
        const char *e = encoding;
        while (1) {
            // qDebug("bol: *e='%c', *n='%c'", *e, *n);
            if (*e == '\0') {
                if (*n)
                    break;
                // qDebug("found encoding id %d", enc->id);
                return enc->id;
            }
            if (*e == *n) {
                ++e;
                ++n;
                continue;
            }
            if (*n != '*')
                break;
            ++n;
            // qDebug("skip: *e='%c', *n='%c'", *e, *n);
            while (*e && *e != *n)
                ++e;
        }
    }
    // qDebug("couldn't find encoding %s", encoding);
    return -1;
}

int qt_mib_for_xlfd_encoding(const char *encoding)
{
    int id = qt_xlfd_encoding_id(encoding);
    if (id != -1) return xlfd_encoding[id].mib;
    return 0;
};

int qt_encoding_id_for_mib(int mib)
{
    const XlfdEncoding *enc = xlfd_encoding;
    for (; enc->name; ++enc) {
        if (enc->mib == mib)
            return enc->id;
    }
    return -1;
}

static const char * xlfd_for_id(int id)
{
    // special case: -1 returns the "*-*" encoding, allowing us to do full
    // database population in a single X server round trip.
    if (id < 0 || id > numEncodings)
        return "*-*";
    return xlfd_encoding[id].name;
}

enum XLFDFieldNames {
    Foundry,
    Family,
    Weight,
    Slant,
    Width,
    AddStyle,
    PixelSize,
    PointSize,
    ResolutionX,
    ResolutionY,
    Spacing,
    AverageWidth,
    CharsetRegistry,
    CharsetEncoding,
    NFontFields
};

// Splits an X font name into fields separated by '-'
static bool parseXFontName(char *fontName, char **tokens)
{
    if (! fontName || fontName[0] == '0' || fontName[0] != '-') {
        tokens[0] = 0;
        return false;
    }

    int          i;
    ++fontName;
    for (i = 0; i < NFontFields && fontName && fontName[0]; ++i) {
        tokens[i] = fontName;
        for (;; ++fontName) {
            if (*fontName == '-')
                break;
            if (! *fontName) {
                fontName = 0;
                break;
            }
        }

        if (fontName) *fontName++ = '\0';
    }

    if (i < NFontFields) {
        for (int j = i ; j < NFontFields; ++j)
            tokens[j] = 0;
        return false;
    }

    return true;
}

static inline bool isZero(char *x)
{
    return (x[0] == '0' && x[1] == 0);
}

static inline bool isScalable(char **tokens)
{
    return (isZero(tokens[PixelSize]) &&