HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| e88a2ed3 GM |
1 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
| 2 | Free Software Foundation, Inc. | |
| 3 | See the end of the file for license conditions. | |
| 4 | ||
| 5 | ||
| 6 | New font handling mechanism with font backend method | |
| 7 | ---------------------------------------------------- | |
| 8 | ||
| 9 | The configure script, if invoked with "--enable-font-backend", checks | |
| 10 | if libraries freetype and fontconfig exist. If they are both | |
| 11 | available, macro "USE_FONT_BACKEND" is defined in src/config.h. In | |
| 12 | that case, the existence of Xft library is checked too. | |
| 13 | ||
| 14 | The new files are: | |
| 15 | font.h -- header providing font-backend related structures | |
| 16 | (most important ones are "struct font" and "struct | |
| 17 | font_driver"), macros, and etc. | |
| 18 | font.c -- main font handling code. | |
| 19 | xfont.c -- font-driver on X for X core fonts. | |
| 20 | ftfont.c -- generic font-driver for FreeType fonts providing | |
| 21 | device-independent methods of struct font_driver. | |
| 22 | xftfont.c -- font-driver on X using Xft for FreeType fonts | |
| 23 | utilizing methods provided by ftfont.c. | |
| 24 | ftxfont.c -- font-driver on X directly using FreeType fonts | |
| 25 | utilizing methods provided by ftfont.c. | |
| 26 | w32font.c -- font driver on w32 using Windows native fonts, | |
| 27 | corresponding to xfont.c | |
| 28 | ||
| 29 | So we already have codes for X. For the other systems (w32 and mac), | |
| 30 | it seems that we need these files: | |
| 31 | atmfont.c -- font-driver on mac using ATM fonts, corresponding | |
| 32 | to xfont.c | |
| 33 | As BDF fonts are currently used on w32, we may also implement these: | |
| 34 | bdffont.c -- generic font-driver for BDF fonts, corresponding to | |
| 35 | ftfont.c | |
| 36 | bdfw32font.c -- font-driver on w32 using BDF fonts, | |
| 37 | corresponding to ftxfont.c | |
| 38 | But, as FreeType already supports BDF fonts, if FreeType and | |
| 39 | Fontconfig are also available on w32, what we need may be: | |
| 40 | ftw32font.c -- font-driver on w32 directly using FreeType fonts | |
| 41 | utilizing methods provided by ftfont.c. | |
| 42 | ||
| 43 | And, for those to work, macterm.c and macfns.c must be changed by the | |
| 44 | similar way as xterm.c and xfns.c (the parts "#ifdef USE_FONT_BACKEND" | |
| 45 | ... "#endif" should be checked). | |
| 46 | ||
| 47 | It may be interesting if Emacs supports a frame buffer directly and | |
| 48 | has these font driver. | |
| 49 | ftfbfont.c -- font-driver on FB for FreeType fonts. | |
| 50 | bdffbfont.c -- font-driver on FB for BDF fonts. | |
| 51 | ||
| 52 | Note: The fontset related codes are not yet matured to work well with | |
| 53 | the font backend method. So, for instance, even if you start Emacs | |
| 54 | as something like this: | |
| 55 | % emacs -fn tahoma | |
| 56 | Non-ASCII Latin characters will not be displayed by the font "tahoma". | |
| 57 | In such a case, please try this: | |
| 58 | ||
| 59 | (set-fontset-font "fontset-default" 'latin '("tahoma" . "unicode-bmp")) | |
| 60 | ||
| 61 | \f | |
| 62 | This file is part of GNU Emacs. | |
| 63 | ||
| 64 | GNU Emacs is free software; you can redistribute it and/or modify | |
| 65 | it under the terms of the GNU General Public License as published by | |
| 66 | the Free Software Foundation; either version 3, or (at your option) | |
| 67 | any later version. | |
| 68 | ||
| 69 | GNU Emacs is distributed in the hope that it will be useful, | |
| 70 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 71 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 72 | GNU General Public License for more details. | |
| 73 | ||
| 74 | You should have received a copy of the GNU General Public License | |
| 75 | along with GNU Emacs; see the file COPYING. If not, write to the | |
| 76 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 77 | Boston, MA 02110-1301, USA. |