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FreeType font driver for PCF fonts Francesco Zappa Nardelli <francesco.zappa.nardelli@ens.fr> Introduction ************ PCF (Portable Compiled Format) is a binary bitmap font format, largely used in X world. This code implements a PCF driver for the FreeType library. Glyph images are loaded into memory only on demand, thus leading to a small memory footprint. Information on the PCF font format can only be worked out from `pcfread.c', and `pcfwrite.c', to be found, for instance, in the XFree86 (www.xfree86.org) source tree (xc/lib/font/bitmap/). Many good bitmap fonts in bdf format come with XFree86: they can be compiled into the pcf format using the `bdftopcf' utility. Supported hardware ****************** The driver has been tested on linux/x86 and sunos5.5/sparc. In both cases the compiler was gcc. When back in Paris, I will test it also on linux/alpha. Encodings ********* Use `FT_Get_BDF_Charset_ID' to access the encoding and registry. The driver always exports `ft_encoding_none' as face->charmap.encoding. FT_Get_Char_Index() behavior is unmodified, that is, it converts the ULong value given as argument into the corresponding glyph number. Known problems ************** - dealing explicitly with encodings breaks the uniformity of freetype2 api. - except for encodings properties, client applications have no visibility of the PCF_Face object. This means that applications cannot directly access font tables and are obliged to trust FreeType. - currently, glyph names and ink_metrics are ignored. I plan to give full visibility of the PCF_Face object in the next release of the driver, thus implementing also glyph names and ink_metrics. - height is defined as (ascent - descent). Is this correct? - if unable to read size information from the font, PCF_Init_Face sets available_size->width and available_size->height to 12. - too many english grammar errors in the readme file :-( License ******* Copyright (C) 2000 by Francesco Zappa Nardelli Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Credits ******* Keith Packard wrote the pcf driver found in XFree86. His work is at the same time the specification and the sample implementation of the PCF format. Undoubtedly, this driver is inspired from his work.