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#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include "scheme.h"
#include "../any_log.h"
double cubic_bezier(double x, double a, double b, double c, double d)
{
const double t = 1 - x;
return a * (t * t * t) + 3 * b * (t * t * x) + 3 * c * (t * x * x) + d * (x * x * x);
}
static void effect_pulse_pre(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->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);
// Make it customizable
double s = cubic_bezier(t, 0.19, 1.0, 0.22, 1.0);
// Make it a parameter
const double amplitude = *(unsigned int *)effect->state / 100.0;
// FIXME: The intent was to scale the animation for long blocks, but it needs more love
//
int x_max = amplitude * (layout->height + (layout->width / (double)layout->height) - 1);
int y_max = amplitude * layout->height;
layout->x_padding = layout->block->x_padding + x_max * s;
layout->y_padding = layout->block->y_padding + y_max * s;
}
static void effect_pulse_finalize(effect_t *effect)
{
free(effect->state);
}
static bool effect_pulse_validate(effect_t *effect, const effect_scheme_t *scheme)
{
unsigned int amplitude = *(unsigned int *)effect->state;
if (amplitude > 100) {
log_error("Effect '%s' pulse amplitude must not exceed 100", effect->label);
return false;
}
return true;
}
static const config_entry_t effect_pulse_entries[] = {
{ "amplitude", CONFIG_UINT, NULL, 0 },
{ 0 },
};
const effect_scheme_t effect_pulse_scheme = {
.name = "pulse",
.effect = {
.finalize = effect_pulse_finalize,
.pre = effect_pulse_pre,
},
.size = sizeof(unsigned int),
.entries = effect_pulse_entries,
.validate = effect_pulse_validate,
};
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