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79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
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* tools/libtxt/libtxt.h - Text processing functions
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*
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* Written 2012 by Werner Almesberger
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* Copyright 2012 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef LIBTXT_H
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#define LIBTXT_H
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#include <stdio.h>
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struct image;
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struct font;
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struct edit {
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enum edit_type {
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edit_string,
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edit_font,
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edit_img,
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edit_spc,
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edit_xoff,
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edit_xpos,
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edit_yoff,
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edit_ypos,
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edit_nl,
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} type;
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union {
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char *s;
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int n;
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} u;
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struct edit *next;
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};
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/*
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* Markup:
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*
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* <FONT fontname>
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* <IMG imagefile>
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* <SPC offset>
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* <X+offset> <X-offset> <X=pos>
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* <Y+offset> ...
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*
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* Empty lines are ignored. The newline of a line containing only markup is
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* also ignored.
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*
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* Newline leaves one blank row between text lines.
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*/
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struct image *load_image_file(FILE *file, const char **error);
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struct image *load_image(const char *name, const char **error);
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void free_image(struct image *img);
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int draw_image(void *canvas, int width, int height,
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const struct image *img, int x, int y);
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struct font *make_font(struct image *img, const char **error);
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void free_font(struct font *font);
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int draw_char(void *canvas, int width, int height,
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const struct font *font, char c, int x, int y);
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int char_height(const struct font *font, char c);
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struct edit *text2edit(const char *s);
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char *edit2text(const struct edit *e);
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void free_edit(struct edit *e);
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void *apply_edits(int width, int height, const struct edit *e,
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const char **error);
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#endif /* !LIBTXT_H */
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