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hekate/bdk/libs/lvgl/lv_misc/lv_anim.c

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/**
* @file anim.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_anim.h"
#if USE_LV_ANIMATION
#include <stddef.h>
#include <string.h>
#include "../lv_hal/lv_hal_tick.h"
#include "lv_task.h"
#include "lv_math.h"
#include "lv_gc.h"
#if defined(LV_GC_INCLUDE)
# include LV_GC_INCLUDE
#endif /* LV_ENABLE_GC */
/*********************
* DEFINES
*********************/
#define LV_ANIM_RESOLUTION 1024
#define LV_ANIM_RES_SHIFT 10
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void anim_task(void * param);
static bool anim_ready_handler(lv_anim_t * a);
/**********************
* STATIC VARIABLES
**********************/
static uint32_t last_task_run;
static bool anim_list_changed;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Init. the animation module
*/
void lv_anim_init(void)
{
lv_ll_init(&LV_GC_ROOT(_lv_anim_ll), sizeof(lv_anim_t));
last_task_run = lv_tick_get();
lv_task_create(anim_task, LV_REFR_PERIOD, LV_TASK_PRIO_MID, NULL);
}
/**
* Create an animation
* @param anim_p an initialized 'anim_t' variable. Not required after call.
*/
void lv_anim_create(lv_anim_t * anim_p)
{
LV_LOG_TRACE("animation create started")
/* Do not let two animations for the same 'var' with the same 'fp'*/
if(anim_p->fp != NULL) lv_anim_del(anim_p->var, anim_p->fp); /*fp == NULL would delete all animations of var*/
/*Add the new animation to the animation linked list*/
lv_anim_t * new_anim = lv_ll_ins_head(&LV_GC_ROOT(_lv_anim_ll));
lv_mem_assert(new_anim);
if(new_anim == NULL) return;
/*Initialize the animation descriptor*/
anim_p->playback_now = 0;
memcpy(new_anim, anim_p, sizeof(lv_anim_t));
/*Set the start value*/
if(new_anim->fp != NULL) new_anim->fp(new_anim->var, new_anim->start);
/* Creating an animation changed the linked list.
* It's important if it happens in a ready callback. (see `anim_task`)*/
anim_list_changed = true;
LV_LOG_TRACE("animation created")
}
/**
* Delete an animation for a variable with a given animator function
* @param var pointer to variable
* @param fp a function pointer which is animating 'var',
* or NULL to delete all animations of 'var'
* @return true: at least 1 animation is deleted, false: no animation is deleted
*/
bool lv_anim_del(void * var, lv_anim_fp_t fp)
{
lv_anim_t * a;
lv_anim_t * a_next;
bool del = false;
a = lv_ll_get_head(&LV_GC_ROOT(_lv_anim_ll));
while(a != NULL) {
/*'a' might be deleted, so get the next object while 'a' is valid*/
a_next = lv_ll_get_next(&LV_GC_ROOT(_lv_anim_ll), a);
if(a->var == var && (a->fp == fp || fp == NULL)) {
lv_ll_rem(&LV_GC_ROOT(_lv_anim_ll), a);
lv_mem_free(a);
anim_list_changed = true; /*Read by `anim_task`. It need to know if a delete occurred in the linked list*/
del = true;
}
a = a_next;
}
return del;
}
/**
* Get the number of currently running animations
* @return the number of running animations
*/
uint16_t lv_anim_count_running(void)
{
uint16_t cnt = 0;
lv_anim_t * a;
LL_READ(LV_GC_ROOT(_lv_anim_ll), a) cnt++;
return cnt++;
}
/**
* Calculate the time of an animation with a given speed and the start and end values
* @param speed speed of animation in unit/sec
* @param start start value of the animation
* @param end end value of the animation
* @return the required time [ms] for the animation with the given parameters
*/
uint16_t lv_anim_speed_to_time(uint16_t speed, int32_t start, int32_t end)
{
int32_t d = LV_MATH_ABS((int32_t) start - end);
uint32_t time = (int32_t)((int32_t)(d * 1000) / speed);
if(time > UINT16_MAX) time = UINT16_MAX;
if(time == 0) {
time++;
}
return time;
}
/**
* Calculate the current value of an animation applying linear characteristic
* @param a pointer to an animation
* @return the current value to set
*/
int32_t lv_anim_path_linear(const lv_anim_t * a)
{
/*Calculate the current step*/
uint16_t step;
if(a->time == a->act_time) step = LV_ANIM_RESOLUTION; /*Use the last value if the time fully elapsed*/
else step = (a->act_time * LV_ANIM_RESOLUTION) / a->time;
/* Get the new value which will be proportional to `step`
* and the `start` and `end` values*/
int32_t new_value;
new_value = (int32_t) step * (a->end - a->start);
new_value = new_value >> LV_ANIM_RES_SHIFT;
new_value += a->start;
return new_value;
}
/**
* Calculate the current value of an animation slowing down the start phase
* @param a pointer to an animation
* @return the current value to set
*/
int32_t lv_anim_path_ease_in(const lv_anim_t * a)
{
/*Calculate the current step*/
uint32_t t;
if(a->time == a->act_time) t = 1024;
else t = (uint32_t)((uint32_t)a->act_time * 1024) / a->time;
int32_t step = lv_bezier3(t, 0, 1, 1, 1024);
int32_t new_value;
new_value = (int32_t) step * (a->end - a->start);
new_value = new_value >> 10;
new_value += a->start;
return new_value;
}
/**
* Calculate the current value of an animation slowing down the end phase
* @param a pointer to an animation
* @return the current value to set
*/
int32_t lv_anim_path_ease_out(const lv_anim_t * a)
{
/*Calculate the current step*/
uint32_t t;
if(a->time == a->act_time) t = 1024;
else t = (uint32_t)((uint32_t)a->act_time * 1024) / a->time;
int32_t step = lv_bezier3(t, 0, 1023, 1023, 1024);
int32_t new_value;
new_value = (int32_t) step * (a->end - a->start);
new_value = new_value >> 10;
new_value += a->start;
return new_value;
}
/**
* Calculate the current value of an animation applying an "S" characteristic (cosine)
* @param a pointer to an animation
* @return the current value to set
*/
int32_t lv_anim_path_ease_in_out(const lv_anim_t * a)
{
/*Calculate the current step*/
uint32_t t;
if(a->time == a->act_time) t = 1024;
else t = (uint32_t)((uint32_t)a->act_time * 1024) / a->time;
int32_t step = lv_bezier3(t, 0, 100, 924, 1024);
int32_t new_value;
new_value = (int32_t) step * (a->end - a->start);
new_value = new_value >> 10;
new_value += a->start;
return new_value;
}
/**
* Calculate the current value of an animation with overshoot at the end
* @param a pointer to an animation
* @return the current value to set
*/
int32_t lv_anim_path_overshoot(const lv_anim_t * a)
{
/*Calculate the current step*/
uint32_t t;
if(a->time == a->act_time) t = 1024;
else t = (uint32_t)((uint32_t)a->act_time * 1024) / a->time;
int32_t step = lv_bezier3(t, 0, 600, 1300, 1024);
int32_t new_value;
new_value = (int32_t) step * (a->end - a->start);
new_value = new_value >> 10;
new_value += a->start;
return new_value;
}
/**
* Calculate the current value of an animation with 3 bounces
* @param a pointer to an animation
* @return the current value to set
*/
int32_t lv_anim_path_bounce(const lv_anim_t * a)
{
/*Calculate the current step*/
uint32_t t;
if(a->time == a->act_time) t = 1024;
else t = (uint32_t)((uint32_t)a->act_time * 1024) / a->time;
int32_t diff = (a->end - a->start);
/*3 bounces has 5 parts: 3 down and 2 up. One part is t / 5 long*/
if(t < 408){
/*Go down*/
t = (t * 2500) >> 10; /*[0..1024] range*/
}
else if(t >= 408 && t < 614) {
/*First bounce back*/
t -= 408;
t = t * 5; /*to [0..1024] range*/
t = 1024 - t;
diff = diff / 6;
}
else if(t >= 614 && t < 819) {
/*Fall back*/
t -= 614;
t = t * 5; /*to [0..1024] range*/
diff = diff / 6;
}
else if(t >= 819 && t < 921) {
/*Second bounce back*/
t -= 819;
t = t * 10; /*to [0..1024] range*/
t = 1024 - t;
diff = diff / 16;
}
else if(t >= 921 && t <= 1024) {
/*Fall back*/
t -= 921;
t = t * 10; /*to [0..1024] range*/
diff = diff / 16;
}
if(t > 1024) t = 1024;
int32_t step = lv_bezier3(t, 1024, 1024, 800, 0);
int32_t new_value;
new_value = (int32_t) step * diff;
new_value = new_value >> 10;
new_value = a->end - new_value;
return new_value;
}
/**
* Calculate the current value of an animation applying step characteristic.
* (Set end value on the end of the animation)
* @param a pointer to an animation
* @return the current value to set
*/
int32_t lv_anim_path_step(const lv_anim_t * a)
{
if(a->act_time >= a->time) return a->end;
else return a->start;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Periodically handle the animations.
* @param param unused
*/
static void anim_task(void * param)
{
(void)param;
lv_anim_t * a;
LL_READ(LV_GC_ROOT(_lv_anim_ll), a) {
a->has_run = 0;
}
uint32_t elaps = lv_tick_elaps(last_task_run);
a = lv_ll_get_head(&LV_GC_ROOT(_lv_anim_ll));
while(a != NULL) {
/*It can be set by `lv_anim_del()` typically in `end_cb`. If set then an animation delete happened in `anim_ready_handler`
* which could make this linked list reading corrupt because the list is changed meanwhile
*/
anim_list_changed = false;
if(!a->has_run) {
a->has_run = 1; /*The list readying might be reseted so need to know which anim has run already*/
a->act_time += elaps;
if(a->act_time >= 0) {
if(a->act_time > a->time) a->act_time = a->time;
int32_t new_value;
new_value = a->path(a);
if(a->fp != NULL) a->fp(a->var, new_value); /*Apply the calculated value*/
/*If the time is elapsed the animation is ready*/
if(a->act_time >= a->time) {
anim_ready_handler(a);
}
}
}
/* If the linked list changed due to anim. delete then it's not safe to continue
* the reading of the list from here -> start from the head*/
if(anim_list_changed) a = lv_ll_get_head(&LV_GC_ROOT(_lv_anim_ll));
else a = lv_ll_get_next(&LV_GC_ROOT(_lv_anim_ll), a);
}
last_task_run = lv_tick_get();
}
/**
* Called when an animation is ready to do the necessary thinks
* e.g. repeat, play back, delete etc.
* @param a pointer to an animation descriptor
* @return true: animation delete occurred nnd the `LV_GC_ROOT(_lv_anim_ll)` has changed
* */
static bool anim_ready_handler(lv_anim_t * a)
{
/*Delete the animation if
* - no repeat and no play back (simple one shot animation)
* - no repeat, play back is enabled and play back is ready */
if((a->repeat == 0 && a->playback == 0) ||
(a->repeat == 0 && a->playback == 1 && a->playback_now == 1)) {
void (*cb)(void *) = a->end_cb;
void * p = a->var;
lv_ll_rem(&LV_GC_ROOT(_lv_anim_ll), a);
lv_mem_free(a);
anim_list_changed = true;
/* Call the callback function at the end*/
/* Check if an animation is deleted in the cb function
* if yes then the caller function has to know this*/
if(cb != NULL) cb(p);
}
/*If the animation is not deleted then restart it*/
else {
a->act_time = - a->repeat_pause; /*Restart the animation*/
/*Swap the start and end values in play back mode*/
if(a->playback != 0) {
/*If now turning back use the 'playback_pause*/
if(a->playback_now == 0) a->act_time = - a->playback_pause;
/*Toggle the play back state*/
a->playback_now = a->playback_now == 0 ? 1 : 0;
/*Swap the start and end values*/
int32_t tmp;
tmp = a->start;
a->start = a->end;
a->end = tmp;
}
}
return anim_list_changed;
}
#endif