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
|
#include <glib.h>
#include <stdbool.h>
#include <math.h>
#include "animate.h"
#include "state.h"
#include "log.h"
double clamp(double x, double min, double max)
{
const double t = x < min ? min : x;
return t > max ? max : t;
}
double smoothstep(double x, double edge0, double edge1)
{
x = clamp((x - edge0) / (edge1 - edge0), 0, 1);
return x * x * (3.0 - 2.0 * x);
}
double quadratic_bezier(double x, double a, double b, double c)
{
g_assert(x >= 0 && x <= 1);
g_assert(a >= 0 && a <= 1);
g_assert(b >= 0 && b <= 1);
g_assert(c >= 0 && c <= 1);
const double t = 1 - x;
return a * t * t + 2 * b * t * x + c * x * x;
}
double cubic_bezier(double x, double a, double b, double c, double d)
{
g_assert(x >= 0 && x <= 1);
g_assert(a >= 0 && a <= 1);
g_assert(b >= 0 && b <= 1);
g_assert(c >= 0 && c <= 1);
g_assert(d >= 0 && d <= 1);
const double t = 1 - x;
return a * (t * t * t) + 3 * b * (t * t * x) + 3 * c * (t * x * x) + d * (x * x * x);
}
typedef struct {
Animation anim;
int width;
cairo_pattern_t *gradient;
} AnimationShine;
// FIXME: Not working for button group
static bool shine_paint(AnimationShine *shine, cairo_t *cr, const Layout *layout)
{
gint64 end = shine->anim.start + shine->anim.duration;
gint64 now = g_get_monotonic_time();
if (now > end) return false;
double t = (double)(now - shine->anim.start) / (end - shine->anim.start);
double pos = cubic_bezier(t, 0.19, 1.0, 0.22, 1.0);
double angle = atan((double)layout->height / layout->width);
// Make it double just to be sure
int h = 2 * (double)layout->height / cos(angle);
int x = layout->x + pos * layout->width - shine->width;
int y = layout->y;
cairo_matrix_t matrix;
cairo_matrix_init_translate(&matrix, -x, -y);
cairo_pattern_set_matrix(shine->gradient, &matrix);
int dx = layout->x + layout->width / 2;
int dy = layout->y + layout->height / 2;
cairo_translate(cr, dx, dy);
cairo_rotate(cr, -angle);
cairo_translate(cr, -dx, -dy);
cairo_set_operator(cr, CAIRO_OPERATOR_ATOP);
cairo_set_source(cr, shine->gradient);
cairo_rectangle(cr, x, y - (h - layout->height) / 2, shine->width, h);
cairo_fill(cr);
return true;
}
Animation *animation_shine_create(gint64 duration)
{
// Note the 0 initialization
AnimationShine *shine = g_malloc0(sizeof(AnimationShine));
shine->anim.type = ANIM_SHINE;
shine->anim.paint_func = (DrawFunc)shine_paint;
shine->anim.duration = duration;
// TODO: Change it depending on container size
shine->width = 25;
shine->gradient = cairo_pattern_create_linear(0, 0, shine->width, 0);
cairo_pattern_add_color_stop_rgba(shine->gradient, 0, 1, 1, 1, 0);
cairo_pattern_add_color_stop_rgba(shine->gradient, 0.5, 1, 1, 1, 0.2);
cairo_pattern_add_color_stop_rgba(shine->gradient, 1, 1, 1, 1, 0);
return (gpointer)shine;
}
static bool pulse_layout(Animation *pulse, Layout *layout)
{
gint64 end = pulse->start + pulse->duration;
gint64 now = g_get_monotonic_time();
if (now > end) return false;
// After half the duration we invert direction
gint64 mid = pulse->start + pulse->duration / 2;
double t = now <= mid
? (double)(now - pulse->start) / (mid - pulse->start)
: 1.0 - (double)(now - mid) / (end - mid);
double pos = cubic_bezier(t, 0.19, 1.0, 0.22, 1.0);
int max = 0.15 * layout->height;
layout->x_pad = layout->btn->x_pad + max * pos;
layout->y_pad = layout->btn->y_pad + max * pos;
return true;
}
Animation *animation_pulse_create(gint64 duration)
{
// Note the 0 initialization
Animation *pulse = g_malloc0(sizeof(Animation));
pulse->type = ANIM_PULSE;
pulse->layout_func = (LayoutFunc)pulse_layout;
pulse->duration = duration;
return (gpointer)pulse;
}
void animation_destroy(Animation *anim)
{
if (anim == NULL) return;
if (anim->type == ANIM_SHINE)
cairo_pattern_destroy(CAST(anim, AnimationShine)->gradient);
g_free(anim);
}
// vim: ts=4 sw=4 et
|
