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/*
# pk.h: manipulate packed format font files.
#
# Copyright (C) 1992, 2011 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
*/
/*
# See the PKtype source code (by Tomas Rokicki), among other places, for the
# precise definition of this bitmap format.
*/
#ifndef PACKED_FONT_LIBRARY_H
#define PACKED_FONT_LIBRARY_H
#include "bounding-box.h"
#include "font.h"
#include "types.h"
/* Prepare and finish off FONT_NAME for reading. */
extern boolean pk_open_input_file (string font_name);
extern void pk_close_input_file (string font_name);
/* The global information about the PK file is given in the preamble. */
typedef struct
{
string comment;
fix_word design_size;
unsigned checksum;
double h_resolution, v_resolution;
} pk_preamble_type;
/* This usually indicates the source of the PK file. */
#define PK_COMMENT(p) ((p).comment)
/* The font's design size is in TeX points, expressed as a fix_word. */
#define PK_DESIGN_SIZE(p) ((p).design_size)
/* The PK checksum should match the checksums in the TFM file and/or the
GF file, if they exist. */
#define PK_CHECKSUM(p) ((p).checksum)
/* We express the resolutions in pixels per point multiplied by 2^16. */
#define PK_H_RESOLUTION(p) ((p).h_resolution)
#define PK_V_RESOLUTION(p) ((p).v_resolution)
/* Return the above structure for the font FONT_NAME. */
extern pk_preamble_type pk_get_preamble (string font_name);
/* The characters comprise the bulk of the file. */
typedef struct
{
one_byte code;
fix_word tfm_width;
signed_4_bytes h_escapement;
bounding_box_type bb;
bitmap_type bitmap;
} pk_char_type;
/* The library guarantees that the character code is in the range 0 to
255 (although the PK format does not require that). */
#define PK_CHARCODE(c) ((c).code)
/* The TFM width is the character's true width divided by the design
size (expressed as a fix_word). */
#define PK_TFM_WIDTH(c) ((c).tfm_width)
/* The horizontal escapement (i.e., set width) is in pixels. */
#define PK_H_ESCAPEMENT(c) ((c).h_escapement)
/* The bounding box is guaranteed to be the tightest possible. */
#define PK_CHAR_BB(c) ((c).bb)
/* The bits themselves. See `bitmap.h'. */
#define PK_BITMAP(c) ((c).bitmap)
/* Allocate and return a pointer to the above structure for the
character CODE in the font FONT_NAME, or NULL if that character is
not in that font. */
extern pk_char_type *pk_get_char (one_byte code, string font_name);
#endif /* not PACKED_FONT_LIBRARY_H */
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