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/* catdvi - get text from DVI files
Copyright (C) 2002 Bjoern Brill <brill@fs.math.uni-frankfurt.de>
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef CANVAS_H
#define CANVAS_H
#include "linebuf.h"
#include "bytesex.h"
typedef struct canv_cell_t canv_cell_t;
typedef struct canv_line_t canv_line_t;
typedef struct canv_t canv_t;
struct canv_t {
sint32 ncols;
sint32 nlines;
canv_line_t * lines;
canv_cell_t * cells;
};
/* constructor */
void canv_init(canv_t * this, sint32 ncols, sint32 nlines);
/* destructor */
void canv_done(canv_t * this);
/* Put unicode string *lb starting at (x, y) -- this is the leftmost
* glyph in the string. Coordinates are 0 <= x < ncols, 0 <= y < nlines
* and increase left to right, top to bottom.
* lb is assumed to be on the heap. canv takes ownership of lb
* (e.g. canv_done will destruct and free it). If this is not desirable,
* create a copy and pass that.
*/
void canv_put_linebuf(
canv_t * this,
linebuf_t * lb,
sint32 xleft,
sint32 y,
sint32 width
);
/* Put a single unicode glyph. It is assumed to have output width 1. */
void canv_put_glyph(canv_t * this, glyph_t glyph, sint32 x, sint32 y);
/* Put a horizontal line (it is made up from line drawing characters) */
void canv_put_hline(canv_t * this, sint32 xleft, sint32 y, sint32 xright);
/* Put a vertical line (it is made up from line drawing characters) */
void canv_put_vline(canv_t * this, sint32 x, sint32 ybottom, sint32 ytop);
/* Put a rectangle of black ink */
void canv_put_black_box(
canv_t * this,
sint32 xleft,
sint32 ybottom,
sint32 xright,
sint32 ytop
);
/* Write the whole character grid to f, using the current output encoding.
* Trailing whitespace in each line is omitted.
*/
void canv_write(const canv_t * this, FILE * f);
#endif /* !defined CANVAS_H */
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