aboutsummaryrefslogtreecommitdiffstats
path: root/draw.c
blob: fa340ffbe9bf2895549d1a0e377527ce1037862b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>

#include "draw.h"
#include "util.h"

Draw *
draw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h) {
	Draw *draw = (Draw *)calloc(1, sizeof(Draw));
	draw->dpy = dpy;
	draw->screen = screen;
	draw->win = win;
	draw->w = w;
	draw->h = h;
	draw->drawable = XCreatePixmap(dpy, win, w, h, DefaultDepth(dpy, screen));
	draw->gc = XCreateGC(dpy, win, 0, NULL);
	XSetLineAttributes(dpy, draw->gc, 1, LineSolid, CapButt, JoinMiter);
	return draw;
}

void
draw_resize(Draw *draw, unsigned int w, unsigned int h) {
	if(!draw)
		return;
	draw->w = w;
	draw->h = h;
	XFreePixmap(draw->dpy, draw->drawable);
	draw->drawable = XCreatePixmap(draw->dpy, draw->win, w, h, DefaultDepth(draw->dpy, draw->screen));
}

void
draw_free(Draw *draw) {
	XFreePixmap(draw->dpy, draw->drawable);
	XFreeGC(draw->dpy, draw->gc);
	free(draw);
}

Fnt *
draw_font_create(Draw *draw, const char *fontname) {
	Fnt *font;
	char *def, **missing;
	int n;

	if(!draw)
		return NULL;
	font = (Fnt *)calloc(1, sizeof(Fnt));
	font->set = XCreateFontSet(draw->dpy, fontname, &missing, &n, &def);
	if(missing) {
		while(n--)
			fprintf(stderr, "draw: missing fontset: %s\n", missing[n]);
		XFreeStringList(missing);
	}
	if(font->set) {
		XFontStruct **xfonts;
		char **font_names;
		XExtentsOfFontSet(font->set);
		n = XFontsOfFontSet(font->set, &xfonts, &font_names);
		while(n--) {
			font->ascent = MAX(font->ascent, (*xfonts)->ascent);
			font->descent = MAX(font->descent,(*xfonts)->descent);
			xfonts++;
		}
	}
	else {
		if(!(font->xfont = XLoadQueryFont(draw->dpy, fontname))
		&& !(font->xfont = XLoadQueryFont(draw->dpy, "fixed")))
			die("error, cannot load font: '%s'\n", fontname);
		font->ascent = font->xfont->ascent;
		font->descent = font->xfont->descent;
	}
	font->h = font->ascent + font->descent;
	return font;
}

void
draw_font_free(Draw *draw, Fnt *font) {
	if(!draw || !font)
		return;
	if(font->set)
		XFreeFontSet(draw->dpy, font->set);
	else
		XFreeFont(draw->dpy, font->xfont);
	free(font);
}

Col *
draw_col_create(Draw *draw, const char *colname) {
	Col *col = (Col *)calloc(1, sizeof(Col));
	Colormap cmap = DefaultColormap(draw->dpy, draw->screen);
	XColor color;

	if(!XAllocNamedColor(draw->dpy, cmap, colname, &color, &color))
		die("error, cannot allocate color '%s'\n", colname);
	col->rgb = color.pixel;
	return col;
}

void
draw_col_free(Draw *draw, Col *col) {
	if(!col)
		return;
	free(col);
}

void
draw_setfont(Draw *draw, Fnt *font) {
	if(!draw)
		return;
	draw->font = font;
}

void
draw_setfg(Draw *draw, Col *col) {
	if(!draw) 
		return;
	draw->fg = col;
}

void
draw_setbg(Draw *draw, Col *col) {
	if(!draw)
		return;
	draw->bg = col;
}

void
draw_rect(Draw *draw, int x, int y, unsigned int w, unsigned int h, Bool filled, Bool empty, Bool invert) {
	int dx;

	if(!draw || !draw->font || !draw->fg || !draw->bg)
		return;
	XSetForeground(draw->dpy, draw->gc, invert ? draw->bg->rgb : draw->fg->rgb);
	dx = (draw->font->ascent + draw->font->descent + 2) / 4;
	if(filled)
		XFillRectangle(draw->dpy, draw->drawable, draw->gc, x+1, y+1, dx+1, dx+1);
	else if(empty)
		XDrawRectangle(draw->dpy, draw->drawable, draw->gc, x+1, y+1, dx, dx);
}

void
draw_text(Draw *draw, int x, int y, unsigned int w, unsigned int h, const char *text, Bool invert) {
	char buf[256];
	int i, tx, ty, len, olen;
	TextExtents tex;

	if(!draw || !draw->fg || !draw->bg)
		return;
	XSetForeground(draw->dpy, draw->gc, invert ? draw->fg->rgb : draw->bg->rgb);
	XFillRectangle(draw->dpy, draw->drawable, draw->gc, x, y, w, h);
	if(!text || !draw->font)
		return;
	olen = strlen(text);
	draw_getextents(draw, text, olen, &tex);
	ty = y + (h / 2) - tex.yOff;
	tx = x + tex.xOff;
	/* shorten text if necessary */
	for(len = MIN(olen, sizeof buf); len && tex.w > w - tex.h; len--)
		draw_getextents(draw, text, len, &tex);
	if(!len)
		return;
	memcpy(buf, text, len);
	if(len < olen)
		for(i = len; i && i > len - 3; buf[--i] = '.');
	XSetForeground(draw->dpy, draw->gc, invert ? draw->bg->rgb : draw->fg->rgb);
	if(draw->font->set)
		XmbDrawString(draw->dpy, draw->drawable, draw->font->set, draw->gc, tx, ty, buf, len);
	else
		XDrawString(draw->dpy, draw->drawable, draw->gc, tx, ty, buf, len);
}

void
draw_map(Draw *draw, int x, int y, unsigned int w, unsigned int h) {
	if(!draw)
		return;
	XCopyArea(draw->dpy, draw->drawable, draw->win, draw->gc, x, y, w, h, x, y);
	XSync(draw->dpy, False);
}


void
draw_getextents(Draw *draw, const char *text, unsigned int len, TextExtents *extents) {
	XRectangle r;

	if(!draw || !draw->font || !text)
		return;
	if(draw->font->set) {
		XmbTextExtents(draw->font->set, text, len, NULL, &r);
		extents->xOff = r.x;
		extents->yOff = r.y;
		extents->w = r.width;
		extents->h = r.height;
	}
	else {
		extents->h = draw->font->ascent + draw->font->descent;
		extents->w = XTextWidth(draw->font->xfont, text, len);
		extents->xOff = extents->h / 2;
		extents->yOff = (extents->h / 2) + draw->font->ascent;
	}
}