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#include <string.h>
#include <assert.h>
#include <math.h>
#include "scheme.h"
#include "../any_log.h"
typedef struct {
effect_t effect;
unsigned int width;
unsigned int padding;
color_t color;
} effect_ring_t;
extern double cubic_bezier(double x, double a, double b, double c, double d);
static void effect_ring_post(effect_t *effect, layout_t *layout, cairo_t *cr)
{
struct timespec now;
timespec_get(&now, TIME_UTC);
// After half the duration we invert direction
struct timespec midpoint = timespec_div(effect->info->duration, 2);
struct timespec diff = timespec_diff(now, effect->start);
double t = timespec_greater(midpoint, diff)
? (double)timespec_to_ms(diff) / timespec_to_ms(midpoint)
: 1.0 - (double)timespec_to_ms(timespec_diff(diff, midpoint)) / timespec_to_ms(midpoint);
double s = cubic_bezier(t, 0.19, 1.0, 0.22, 1.0);
double angle = 2 * M_PI * s;
(void)angle;
effect_ring_t *ring = (effect_ring_t *)effect;
double radius = layout->width / 2 - ring->padding - ring->width / 2;
cairo_set_line_width(cr, ring->width);
cairo_set_source_rgba(cr, ring->color.r, ring->color.g, ring->color.b, ring->color.a);
cairo_arc(cr, layout->x + layout->width / 2, layout->y + layout->height / 2, radius, M_PI/2, 0);
cairo_stroke(cr);
}
static effect_t *effect_ring_allocate(const effect_info_t *info)
{
effect_ring_t *effect = malloc(sizeof(effect_ring_t));
effect_init((effect_t *)effect, info);
effect->width = *(unsigned int *)info->state;
effect->padding = *(unsigned int *)(info->state + sizeof(unsigned int));
effect->color = *(color_t*)(info->state + 2 * sizeof(unsigned int));
return (effect_t *)effect;
}
static void effect_ring_finalize(effect_t *effect)
{
free(effect);
}
static const config_entry_t effect_ring_entries[] = {
{ "width", CONFIG_UINT, NULL, 0 },
{ "padding", CONFIG_UINT, NULL, sizeof(unsigned int) },
{ "color", CONFIG_COLOR, NULL, sizeof(unsigned int) * 2},
{ 0 },
};
const effect_scheme_t effect_ring_scheme = {
.name = "ring",
.info = {
.duration = {
.tv_sec = 0,
.tv_nsec = 200000000,
},
.allocate = effect_ring_allocate,
.finalize = effect_ring_finalize,
.post = effect_ring_post,
},
.size = sizeof(unsigned int) * 2 + sizeof(color_t),
.entries = effect_ring_entries,
.validate = NULL,
};
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