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Add test for steps easing function value calculation

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Kovid Goyal
2024-07-17 17:22:43 +05:30
parent e927f8da62
commit 39dfa75fe7
4 changed files with 53 additions and 9 deletions
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35
kitty/animation.c
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@@ -41,6 +41,7 @@ typedef struct Animation {
#include "animation.h"
#include "state.h"
Animation*
alloc_animation(void) {
@@ -178,6 +179,8 @@ apply_easing_curve(const Animation *a, double val, monotonic_t duration) {
if (!a->count) return val;
size_t idx = MIN((size_t)(val * a->count), a->count - 1);
animation_function *f = a->functions + idx;
double interval_size = 1. / a->count, interval_start = val - idx * interval_size;
val = (val - interval_start) / interval_size;
double ans = f->curve(&f->params, val, duration);
return f->y_at_start + unit_value(ans) * f->y_size;
}
@@ -244,13 +247,10 @@ add_steps_animation(Animation *a, double y_at_start, double y_at_end, size_t cou
double jump_size = 1. / count, start_value = 0.;
size_t num_of_buckets = count;
switch (step) {
case EASING_STEP_START:
start_value = jump_size;
num_of_buckets--;
break;
case EASING_STEP_START: start_value = jump_size; break;
case EASING_STEP_END: break;
case EASING_STEP_NONE:
num_of_buckets--;
jump_size = 1. / (num_of_buckets - 1);
break;
case EASING_STEP_BOTH:
num_of_buckets++;
@@ -264,3 +264,28 @@ add_steps_animation(Animation *a, double y_at_start, double y_at_end, size_t cou
animation_function *f = init_function(a, y_at_start, y_at_end, step_easing_curve);
f->params = p;
}
static PyObject*
test_cursor_blink_easing_function(PyObject *self UNUSED, PyObject *args) {
Animation *a = OPT(animation.cursor);
if (!animation_is_valid(a)) {
PyErr_SetString(PyExc_RuntimeError, "must set a cursor blink animation on the global options object first");
return NULL;
}
double t, duration_s = 0.5;
if (!PyArg_ParseTuple(args, "d|d", &t, &duration_s)) return NULL;
monotonic_t duration = s_double_to_monotonic_t(duration_s);
animation_function f = a->functions[0];
return PyFloat_FromDouble(f.curve(f.params, t, duration));
}
static PyMethodDef module_methods[] = {
METHODB(test_cursor_blink_easing_function, METH_VARARGS),
{NULL, NULL, 0, NULL} /* Sentinel */
};
bool init_animations(PyObject *module) {
if (PyModule_AddFunctions(module, module_methods) != 0) return false;
return true;
}