libtwin/twin_icon.c

/*
 * Twin - A Tiny Window System
 * Copyright © 2004 Keith Packard <keithp@keithp.com>
 * All rights reserved.
 *
 * This Library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This Library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with the Twin Library; see the file COPYING.  If not,
 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "twinint.h"

#define G(d)	((signed char) ((d) * 64))

#define ICON_THIN   (1.0/20.0)

#define L(v)	    G(v + ICON_THIN/2)
#define T(v)	    G(v + ICON_THIN/2)
#define R(v)	    G(v - ICON_THIN/2)
#define B(v)	    G(v - ICON_THIN/2)
const signed char _twin_itable[] = {
    /* Menu */
#define TWIN_MENU_POS	    0
    'm', L(0), T(0),
    'd', R(1), T(0),
    'd', R(1), B(1),
    'd', L(0), B(1),
    'x',
    's',
    'm', G(0.2), G(0.2),
    'd', G(0.8), G(0.2),
    's',
    'm', G(0.2), G(0.4),
    'd', G(0.8), G(0.4),
    's',
    'm', G(0.2), G(0.6),
    'd', G(0.8), G(0.6),
    's',
    'm', G(0.2), G(0.8),
    'd', G(0.8), G(0.8),
    's',
    'e',
#define TWIN_MENU_LEN	    43
    /* Minimize */
#define TWIN_MINIMIZE_POS   TWIN_MENU_POS + TWIN_MENU_LEN
    'm', L(0), G(0.8),
    'd', L(0), B(1),
    'd', R(1), B(1),
    'd', R(1), G(0.8),
    'x',
    'w', G(0.05),
    'p',
    'e',
#define TWIN_MINIMIZE_LEN   17
    /* Maximize */
#define TWIN_MAXIMIZE_POS   TWIN_MINIMIZE_POS + TWIN_MINIMIZE_LEN
    'm', L(0), T(0),
    'd', L(0), G(0.2),
    'd', R(1), G(0.2),
    'd', R(1), T(0),
    'f',
    'm', L(0), T(0),
    'd', L(0), B(1),
    'd', R(1), B(1),
    'd', R(1), T(0),
    'x',
    's',
    'e',
#define TWIN_MAXIMIZE_LEN   28
    /* Close */
#define TWIN_CLOSE_POS	    TWIN_MAXIMIZE_POS + TWIN_MAXIMIZE_LEN
    'm', L(0), T(0),
    'd', L(0), T(0.1),
    'd', G(0.4), G(0.5),
    'd', L(0), B(0.9),
    'd', L(0), B(1),
    'd', L(0.1), B(1),
    'd', G(0.5), G(0.6),
    'd', R(0.9), B(1),
    'd', R(1), B(1),
    'd', R(1), B(0.9),
    'd', G(0.6), G(0.5),
    'd', R(1), T(0.1),
    'd', R(1), T(0),
    'd', R(0.9), T(0),
    'd', G(0.5), G(0.4),
    'd', L(0.1), T(0),
    'x',
    'p',
    'e',
#define TWIN_CLOSE_LEN	    51
    /* Resize */
#define TWIN_RESIZE_POS	    TWIN_CLOSE_POS + TWIN_CLOSE_LEN
    'm', L(0), G(-0.8),
    'd', L(0), T(0),
    'd', G(-0.8), T(0),
    'd', G(-0.8), G(0.2),
    'd', G(0.2), G(0.2),
    'd', G(0.2), G(-0.8),
    'x',
    'p',
    'e',
#define TWIN_RESIZE_LEN	    21
};

const uint16_t	_twin_icons[] = {
    TWIN_MENU_POS, 
    TWIN_MINIMIZE_POS,
    TWIN_MAXIMIZE_POS,
    TWIN_CLOSE_POS,
    TWIN_RESIZE_POS,
};
    
#define V(i)	(g[i] << 10)

#define TWIN_ICON_FILL	    0xff808080
#define TWIN_ICON_STROKE    0xff202020

void
twin_icon_draw (twin_pixmap_t *pixmap,
		twin_icon_t icon,
		twin_matrix_t matrix)
{
    twin_path_t		*path = twin_path_create ();
    const signed char	*g = _twin_itable + _twin_icons[icon];
    twin_fixed_t	stroke_width = twin_double_to_fixed (ICON_THIN);

    twin_path_set_matrix (path, matrix);
    for (;;)
    {
	switch (*g++) {
	case 'm': 
	    twin_path_move (path, V(0), V(1)); 
	    g += 2; 
	    continue;
	case 'd': 
	    twin_path_draw (path, V(0), V(1)); 
	    g += 2; 
	    continue;
	case 'c':
	    twin_path_curve (path, V(0), V(1), V(2), V(3), V(4), V(5));
	    g += 6;
	    continue;
	case 'x':
	    twin_path_close (path);
	    continue;
	case 'w':
	    stroke_width = V(0); 
	    g+= 1; 
	    continue;
	case 'f':   
	    twin_paint_path (pixmap, TWIN_ICON_FILL, path);
	    twin_path_empty (path);
	    continue;
	case 's':
	    twin_paint_stroke (pixmap, TWIN_ICON_STROKE, path, stroke_width);
	    twin_path_empty (path);
	    continue;
	case 'p':
	    twin_paint_path (pixmap, TWIN_ICON_FILL, path);
	    twin_paint_stroke (pixmap, TWIN_ICON_STROKE, path, stroke_width);
	    twin_path_empty (path);
	    continue;
	case 'e':
	    break;
	}
	break;
    }
    twin_path_destroy (path);
}