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#include <string.h>
#include <math.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include "scheme.h"
#include "../any_log.h"
typedef struct {
effect_t effect;
unsigned int speed;
cairo_pattern_t *gradient;
} effect_rainbow_t;
extern double cubic_bezier(double x, double a, double b, double c, double d);
static void effect_rainbow_pre(effect_t *effect, layout_t *layout, cairo_t *cr)
{
struct timespec now;
timespec_get(&now, TIME_UTC);
struct timespec diff = timespec_diff(now, effect->start);
double t = (double)timespec_to_ms(diff) / timespec_to_ms(effect->info->duration);
double s = cubic_bezier(t, 0.19, 1.0, 0.22, 1.0);
(void ) s;;
effect_rainbow_t *rainbow = (effect_rainbow_t *)effect;
double degree = M_PI / 180.0;
int radius = layout->height / 2 - layout->y_padding;
cairo_matrix_t matrix;
cairo_matrix_init_translate(&matrix, s, 0);
//cairo_matrix_scale(&matrix, layout->x, layout->y);
cairo_pattern_set_matrix(rainbow->gradient, &matrix);
cairo_set_source(cr, rainbow->gradient);
cairo_new_sub_path(cr);
cairo_arc(cr, layout->x + layout->x_padding + radius, layout->y + layout->y_padding + radius, radius, 90 * degree, 270 * degree);
cairo_arc(cr, layout->x + layout->width - layout->x_padding - radius, layout->y + layout->y_padding + radius, radius, 270 * degree, 450 * degree);
cairo_close_path(cr);
cairo_fill(cr);
}
static effect_t *effect_rainbow_allocate(const effect_info_t *info)
{
effect_rainbow_t *effect = malloc(sizeof(effect_rainbow_t));
effect_init((effect_t *)effect, info);
effect->speed = 1;
effect->gradient = cairo_pattern_create_linear(0, 0, 1, 0);
cairo_pattern_set_extend(effect->gradient, CAIRO_EXTEND_REPEAT);
unsigned int colors[] = {
0xff0000, 0xff7300, 0xfffb00,
0x48ff00, 0x00ffd5, 0x002bff,
0x7a00ff, 0xff00c8, 0xff0000,
};
for (int i = 0; i < 9; i++) {
color_t color = color_hex(colors[i]);
cairo_pattern_add_color_stop_rgb(effect->gradient, i * (1.0 / 9.0),
color.r, color.g, color.b);
}
return (effect_t *)effect;
}
static void effect_rainbow_finalize(effect_rainbow_t *effect)
{
cairo_pattern_destroy(effect->gradient);
free(effect);
}
static bool effect_rainbow_validate(effect_info_t *info, const effect_scheme_t *scheme)
{
return true;
}
static const config_entry_t effect_rainbow_entries[] = {
{ 0 },
};
const effect_scheme_t effect_rainbow_scheme = {
.name = "rainbow",
.info = {
.duration = {
.tv_sec = 0,
.tv_nsec = 200000000,
},
.allocate = effect_rainbow_allocate,
.finalize = (effect_finalize_t)effect_rainbow_finalize,
.pre = effect_rainbow_pre,
},
.size = sizeof(unsigned int),
.entries = effect_rainbow_entries,
.validate = effect_rainbow_validate,
};
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