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
|
/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <math.h>
#include <cairo.h>
#include <sys/time.h>
#include <linux/input.h>
#include <wayland-client.h>
#include "window.h"
struct flower {
struct display *display;
struct window *window;
struct widget *widget;
int width, height;
};
static void
set_random_color(cairo_t *cr)
{
cairo_set_source_rgba(cr,
0.5 + (random() % 50) / 49.0,
0.5 + (random() % 50) / 49.0,
0.5 + (random() % 50) / 49.0,
0.5 + (random() % 100) / 99.0);
}
static void
draw_stuff(cairo_surface_t *surface, int width, int height)
{
const int petal_count = 3 + random() % 5;
const double r1 = 60 + random() % 35;
const double r2 = 20 + random() % 40;
const double u = (10 + random() % 90) / 100.0;
const double v = (random() % 90) / 100.0;
cairo_t *cr;
int i;
double t, dt = 2 * M_PI / (petal_count * 2);
double x1, y1, x2, y2, x3, y3;
cr = cairo_create(surface);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr, 0, 0, 0, 0);
cairo_paint(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_translate(cr, width / 2, height / 2);
cairo_move_to(cr, cos(0) * r1, sin(0) * r1);
for (t = 0, i = 0; i < petal_count; i++, t += dt * 2) {
x1 = cos(t) * r1;
y1 = sin(t) * r1;
x2 = cos(t + dt) * r2;
y2 = sin(t + dt) * r2;
x3 = cos(t + 2 * dt) * r1;
y3 = sin(t + 2 * dt) * r1;
cairo_curve_to(cr,
x1 - y1 * u, y1 + x1 * u,
x2 + y2 * v, y2 - x2 * v,
x2, y2);
cairo_curve_to(cr,
x2 - y2 * v, y2 + x2 * v,
x3 + y3 * u, y3 - x3 * u,
x3, y3);
}
cairo_close_path(cr);
set_random_color(cr);
cairo_fill_preserve(cr);
set_random_color(cr);
cairo_stroke(cr);
cairo_destroy(cr);
}
static void
resize_handler(struct widget *widget,
int32_t width, int32_t height, void *data)
{
struct flower *flower = data;
/* Dont resize me */
widget_set_size(flower->widget, flower->width, flower->height);
}
static void
redraw_handler(struct widget *widget, void *data)
{
struct flower *flower = data;
cairo_surface_t *surface;
surface = window_get_surface(flower->window);
if (surface == NULL ||
cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
fprintf(stderr, "failed to create cairo egl surface\n");
return;
}
draw_stuff(surface, flower->width, flower->height);
cairo_surface_destroy(surface);
}
static void
button_handler(struct widget *widget,
struct input *input, uint32_t time,
uint32_t button, enum wl_pointer_button_state state, void *data)
{
struct flower *flower = data;
switch (button) {
case BTN_LEFT:
if (state == WL_POINTER_BUTTON_STATE_PRESSED)
window_move(flower->window, input,
display_get_serial(flower->display));
break;
case BTN_MIDDLE:
if (state == WL_POINTER_BUTTON_STATE_PRESSED)
widget_schedule_redraw(widget);
break;
case BTN_RIGHT:
if (state == WL_POINTER_BUTTON_STATE_PRESSED)
window_show_frame_menu(flower->window, input, time);
break;
}
}
static void
touch_down_handler(struct widget *widget, struct input *input,
uint32_t serial, uint32_t time, int32_t id,
float x, float y, void *data)
{
struct flower *flower = data;
window_touch_move(flower->window, input,
display_get_serial(flower->display));
}
int main(int argc, char *argv[])
{
struct flower flower;
struct display *d;
struct timeval tv;
d = display_create(&argc, argv);
if (d == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
gettimeofday(&tv, NULL);
srandom(tv.tv_usec);
flower.width = 200;
flower.height = 200;
flower.display = d;
flower.window = window_create(d);
flower.widget = window_add_widget(flower.window, &flower);
window_set_title(flower.window, "Flower");
widget_set_resize_handler(flower.widget, resize_handler);
widget_set_redraw_handler(flower.widget, redraw_handler);
widget_set_button_handler(flower.widget, button_handler);
widget_set_default_cursor(flower.widget, CURSOR_HAND1);
widget_set_touch_down_handler(flower.widget, touch_down_handler);
window_schedule_resize(flower.window, flower.width, flower.height);
display_run(d);
return 0;
}
|
