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- /**
- * @file lv_refr.c
- *
- */
- /*********************
- * INCLUDES
- *********************/
- #include "../../lv_conf.h"
- #include <stddef.h>
- #include "lv_refr.h"
- #include "lv_vdb.h"
- #include "../lv_hal/lv_hal_tick.h"
- #include "../lv_misc/lv_task.h"
- #include "../lv_misc/lv_mem.h"
- /*********************
- * DEFINES
- *********************/
- /**********************
- * TYPEDEFS
- **********************/
- typedef struct
- {
- lv_area_t area;
- uint8_t joined;
- }lv_join_t;
- /**********************
- * STATIC PROTOTYPES
- **********************/
- static void lv_refr_task(void * param);
- static void lv_refr_join_area(void);
- static void lv_refr_areas(void);
- #if LV_VDB_SIZE == 0
- static void lv_refr_area_no_vdb(const lv_area_t * area_p);
- #else
- static void lv_refr_area_with_vdb(const lv_area_t * area_p);
- static void lv_refr_area_part_vdb(const lv_area_t * area_p);
- #endif
- static lv_obj_t * lv_refr_get_top_obj(const lv_area_t * area_p, lv_obj_t * obj);
- static void lv_refr_obj_and_children(lv_obj_t * top_p, const lv_area_t * mask_p);
- static void lv_refr_obj(lv_obj_t * obj, const lv_area_t * mask_ori_p);
- /**********************
- * STATIC VARIABLES
- **********************/
- static lv_join_t inv_buf[LV_INV_FIFO_SIZE];
- static uint16_t inv_buf_p;
- static void (*monitor_cb)(uint32_t, uint32_t); /*Monitor the rendering time*/
- static void (*round_cb)(lv_area_t*); /*If set then called to modify invalidated areas for special display controllers*/
- static uint32_t px_num;
- /**********************
- * MACROS
- **********************/
- /**********************
- * GLOBAL FUNCTIONS
- **********************/
- /**
- * Initialize the screen refresh subsystem
- */
- void lv_refr_init(void)
- {
- inv_buf_p = 0;
- memset(inv_buf, 0, sizeof(inv_buf));
- lv_task_t* task;
- task = lv_task_create(lv_refr_task, LV_REFR_PERIOD, LV_TASK_PRIO_MID, NULL);
- lv_task_ready(task); /*Be sure the screen will be refreshed immediately on start up*/
- }
- /**
- * Invalidate an area
- * @param area_p pointer to area which should be invalidated
- */
- void lv_inv_area(const lv_area_t * area_p)
- {
- /*Clear the invalidate buffer if the parameter is NULL*/
- if(area_p == NULL) {
- inv_buf_p = 0;
- return;
- }
-
- lv_area_t scr_area;
- scr_area.x1 = 0;
- scr_area.y1 = 0;
- scr_area.x2 = LV_HOR_RES - 1;
- scr_area.y2 = LV_VER_RES - 1;
-
- lv_area_t com_area;
- bool suc;
- suc = lv_area_union(&com_area, area_p, &scr_area);
- /*The area is truncated to the screen*/
- if(suc != false) {
- if(round_cb) round_cb(&com_area);
- /*Save only if this area is not in one of the saved areas*/
- uint16_t i;
- for(i = 0; i < inv_buf_p; i++) {
- if(lv_area_is_in(&com_area, &inv_buf[i].area) != false) return;
- }
- /*Save the area*/
- if(inv_buf_p < LV_INV_FIFO_SIZE) {
- lv_area_copy(&inv_buf[inv_buf_p].area,&com_area);
- } else {/*If no place for the area add the screen*/
- inv_buf_p = 0;
- lv_area_copy(&inv_buf[inv_buf_p].area,&scr_area);
- }
- inv_buf_p ++;
- }
- }
- /**
- * Set a function to call after every refresh to announce the refresh time and the number of refreshed pixels
- * @param cb pointer to a callback function (void my_refr_cb(uint32_t time_ms, uint32_t px_num))
- * time_ms: refresh time in [ms]
- * px_num: not the drawn pixels but the number of affected pixels of the screen
- * (more pixels are drawn because of overlapping objects)
- */
- void lv_refr_set_monitor_cb(void (*cb)(uint32_t, uint32_t))
- {
- monitor_cb = cb;
- }
- /**
- * Called when an area is invalidated to modify the coordinates of the area.
- * Special display controllers may require special coordinate rounding
- * @param cb pointer to the a function which will modify the area
- */
- void lv_refr_set_round_cb(void(*cb)(lv_area_t*))
- {
- round_cb = cb;
- }
- /**
- * Get the number of areas in the buffer
- * @return number of invalid areas
- */
- uint16_t lv_refr_get_buf_size(void)
- {
- return inv_buf_p;
- }
- /**
- * Pop (delete) the last 'num' invalidated areas from the buffer
- * @param num number of areas to delete
- */
- void lv_refr_pop_from_buf(uint16_t num)
- {
- if(inv_buf_p < num) inv_buf_p = 0;
- else inv_buf_p -= num;
- }
- /**********************
- * STATIC FUNCTIONS
- **********************/
- /**
- * Called periodically to handle the refreshing
- * @param param unused
- */
- static void lv_refr_task(void * param)
- {
- (void)param;
- uint32_t start = lv_tick_get();
- lv_refr_join_area();
-
- lv_refr_areas();
- bool refr_done = false;
- if(inv_buf_p != 0) refr_done = true;
- memset(inv_buf, 0, sizeof(inv_buf));
- inv_buf_p = 0;
- /* In the callback lv_obj_inv can occur
- * therefore be sure the inv_buf is cleared prior to it*/
- if(refr_done != false) {
- if(monitor_cb != NULL) {
- monitor_cb(lv_tick_elaps(start), px_num);
- }
- }
- }
- /**
- * Join the areas which has got common parts
- */
- static void lv_refr_join_area(void)
- {
- uint32_t join_from;
- uint32_t join_in;
- lv_area_t joined_area;
- for(join_in = 0; join_in < inv_buf_p; join_in++) {
- if(inv_buf[join_in].joined != 0) continue;
-
- /*Check all areas to join them in 'join_in'*/
- for(join_from = 0; join_from < inv_buf_p; join_from++) {
- /*Handle only unjoined areas and ignore itself*/
- if(inv_buf[join_from].joined != 0 || join_in == join_from) {
- continue;
- }
- /*Check if the areas are on each other*/
- if(lv_area_is_on(&inv_buf[join_in].area,
- &inv_buf[join_from].area) == false)
- {
- continue;
- }
-
- lv_area_join(&joined_area, &inv_buf[join_in].area,
- &inv_buf[join_from].area);
- /*Join two area only if the joined area size is smaller*/
- if(lv_area_get_size(&joined_area) <
- (lv_area_get_size(&inv_buf[join_in].area) + lv_area_get_size(&inv_buf[join_from].area))) {
- lv_area_copy(&inv_buf[join_in].area, &joined_area);
- /*Mark 'join_form' is joined into 'join_in'*/
- inv_buf[join_from].joined = 1;
- }
- }
- }
- }
- /**
- * Refresh the joined areas
- */
- static void lv_refr_areas(void)
- {
- px_num = 0;
- uint32_t i;
- for(i = 0; i < inv_buf_p; i++) {
- /*Refresh the unjoined areas*/
- if(inv_buf[i].joined == 0) {
- /*If there is no VDB do simple drawing*/
- #if LV_VDB_SIZE == 0
- lv_refr_area_no_vdb(&inv_buf[i].area);
- #else
- /*If VDB is used...*/
- lv_refr_area_with_vdb(&inv_buf[i].area);
- #endif
- if(monitor_cb != NULL) px_num += lv_area_get_size(&inv_buf[i].area);
- }
- }
- }
- #if LV_VDB_SIZE == 0
- /**
- * Refresh an area if there is no Virtual Display Buffer
- * @param area_p pointer to an area to refresh
- */
- static void lv_refr_area_no_vdb(const lv_area_t * area_p)
- {
- lv_obj_t * top_p;
-
- /*Get top object which is not covered by others*/
- top_p = lv_refr_get_top_obj(area_p, lv_scr_act());
-
- /*Do the refreshing*/
- lv_refr_obj_and_children(top_p, area_p);
- }
- #else
- /**
- * Refresh an area if there is Virtual Display Buffer
- * @param area_p pointer to an area to refresh
- */
- static void lv_refr_area_with_vdb(const lv_area_t * area_p)
- {
- /*Calculate the max row num*/
- lv_coord_t w = lv_area_get_width(area_p);
- lv_coord_t h = lv_area_get_height(area_p);
- lv_coord_t y2 = area_p->y2 >= LV_VER_RES ? y2 = LV_VER_RES - 1 : area_p->y2;
- uint32_t max_row = (uint32_t) LV_VDB_SIZE / w;
- if(max_row > h) max_row = h;
- /*Always use the full row*/
- uint32_t row;
- lv_coord_t row_last = 0;
- for(row = area_p->y1; row + max_row - 1 <= y2; row += max_row) {
- lv_vdb_t * vdb_p = lv_vdb_get();
- /*Calc. the next y coordinates of VDB*/
- vdb_p->area.x1 = area_p->x1;
- vdb_p->area.x2 = area_p->x2;
- vdb_p->area.y1 = row;
- vdb_p->area.y2 = row + max_row - 1;
- if(vdb_p->area.y2 > y2) vdb_p->area.y2 = y2;
- row_last = vdb_p->area.y2;
- lv_refr_area_part_vdb(area_p);
- }
-
- /*If the last y coordinates are not handled yet ...*/
- if(y2 != row_last) {
- lv_vdb_t * vdb_p = lv_vdb_get();
- /*Calc. the next y coordinates of VDB*/
- vdb_p->area.x1 = area_p->x1;
- vdb_p->area.x2 = area_p->x2;
- vdb_p->area.y1 = row;
- vdb_p->area.y2 = y2;
- /*Refresh this part too*/
- lv_refr_area_part_vdb(area_p);
- }
- }
- /**
- * Refresh a part of an area which is on the actual Virtual Display Buffer
- * @param area_p pointer to an area to refresh
- */
- static void lv_refr_area_part_vdb(const lv_area_t * area_p)
- {
- lv_vdb_t * vdb_p = lv_vdb_get();
- lv_obj_t * top_p;
- /*Get the new mask from the original area and the act. VDB
- It will be a part of 'area_p'*/
- lv_area_t start_mask;
- lv_area_union(&start_mask, area_p, &vdb_p->area);
- /*Get the most top object which is not covered by others*/
- top_p = lv_refr_get_top_obj(&start_mask, lv_scr_act());
- /*Do the refreshing from the top object*/
- lv_refr_obj_and_children(top_p, &start_mask);
- /*Also refresh top and sys layer unconditionally*/
- lv_refr_obj_and_children(lv_layer_top(), &start_mask);
- lv_refr_obj_and_children(lv_layer_sys(), &start_mask);
- /*Flush the content of the VDB*/
- lv_vdb_flush();
- }
- #endif /*LV_VDB_SIZE == 0*/
- /**
- * Search the most top object which fully covers an area
- * @param area_p pointer to an area
- * @param obj the first object to start the searching (typically a screen)
- * @return
- */
- static lv_obj_t * lv_refr_get_top_obj(const lv_area_t * area_p, lv_obj_t * obj)
- {
- lv_obj_t * i;
- lv_obj_t * found_p = NULL;
-
- /*If this object is fully cover the draw area check the children too */
- if(lv_area_is_in(area_p, &obj->coords) && obj->hidden == 0)
- {
- LL_READ(obj->child_ll, i) {
- found_p = lv_refr_get_top_obj(area_p, i);
-
- /*If a children is ok then break*/
- if(found_p != NULL) {
- break;
- }
- }
-
- /*If no better children check this object*/
- if(found_p == NULL) {
- lv_style_t * style = lv_obj_get_style(obj);
- if(style->body.opa == LV_OPA_COVER &&
- obj->design_func(obj, area_p, LV_DESIGN_COVER_CHK) != false) {
- found_p = obj;
- }
- }
- }
-
- return found_p;
- }
- /**
- * Make the refreshing from an object. Draw all its children and the youngers too.
- * @param top_p pointer to an objects. Start the drawing from it.
- * @param mask_p pointer to an area, the objects will be drawn only here
- */
- static void lv_refr_obj_and_children(lv_obj_t * top_p, const lv_area_t * mask_p)
- {
- /* Normally always will be a top_obj (at least the screen)
- * but in special cases (e.g. if the screen has alpha) it won't.
- * In this case use the screen directly */
- if(top_p == NULL) top_p = lv_scr_act();
-
- /*Refresh the top object and its children*/
- lv_refr_obj(top_p, mask_p);
-
- /*Draw the 'younger' sibling objects because they can be on top_obj */
- lv_obj_t * par;
- lv_obj_t * i;
- lv_obj_t * border_p = top_p;
- par = lv_obj_get_parent(top_p);
- /*Do until not reach the screen*/
- while(par != NULL) {
- /*object before border_p has to be redrawn*/
- i = lv_ll_get_prev(&(par->child_ll), border_p);
- while(i != NULL) {
- /*Refresh the objects*/
- lv_refr_obj(i, mask_p);
- i = lv_ll_get_prev(&(par->child_ll), i);
- }
-
- /*The new border will be there last parents,
- *so the 'younger' brothers of parent will be refreshed*/
- border_p = par;
- /*Go a level deeper*/
- par = lv_obj_get_parent(par);
- }
- /*Call the post draw design function of the parents of the to object*/
- par = lv_obj_get_parent(top_p);
- while(par != NULL) {
- par->design_func(par, mask_p, LV_DESIGN_DRAW_POST);
- par = lv_obj_get_parent(par);
- }
- }
- /**
- * Refresh an object an all of its children. (Called recursively)
- * @param obj pointer to an object to refresh
- * @param mask_ori_p pointer to an area, the objects will be drawn only here
- */
- static void lv_refr_obj(lv_obj_t * obj, const lv_area_t * mask_ori_p)
- {
- /*Do not refresh hidden objects*/
- if(obj->hidden != 0) return;
-
- bool union_ok; /* Store the return value of area_union */
- /* Truncate the original mask to the coordinates of the parent
- * because the parent and its children are visible only here */
- lv_area_t obj_mask;
- lv_area_t obj_ext_mask;
- lv_area_t obj_area;
- lv_coord_t ext_size = obj->ext_size;
- lv_obj_get_coords(obj, &obj_area);
- obj_area.x1 -= ext_size;
- obj_area.y1 -= ext_size;
- obj_area.x2 += ext_size;
- obj_area.y2 += ext_size;
- union_ok = lv_area_union(&obj_ext_mask, mask_ori_p, &obj_area);
-
- /*Draw the parent and its children only if they ore on 'mask_parent'*/
- if(union_ok != false) {
- /* Redraw the object */
- lv_style_t * style = lv_obj_get_style(obj);
- if(style->body.opa != LV_OPA_TRANSP) {
- obj->design_func(obj, &obj_ext_mask, LV_DESIGN_DRAW_MAIN);
- //tick_wait_ms(100); /*DEBUG: Wait after every object draw to see the order of drawing*/
- }
- /*Create a new 'obj_mask' without 'ext_size' because the children can't be visible there*/
- lv_obj_get_coords(obj, &obj_area);
- union_ok = lv_area_union(&obj_mask, mask_ori_p, &obj_area);
- if(union_ok != false) {
- lv_area_t mask_child; /*Mask from obj and its child*/
- lv_obj_t * child_p;
- lv_area_t child_area;
- LL_READ_BACK(obj->child_ll, child_p)
- {
- lv_obj_get_coords(child_p, &child_area);
- ext_size = child_p->ext_size;
- child_area.x1 -= ext_size;
- child_area.y1 -= ext_size;
- child_area.x2 += ext_size;
- child_area.y2 += ext_size;
- /* Get the union (common parts) of original mask (from obj)
- * and its child */
- union_ok = lv_area_union(&mask_child, &obj_mask, &child_area);
- /*If the parent and the child has common area then refresh the child */
- if(union_ok) {
- /*Refresh the next children*/
- lv_refr_obj(child_p, &mask_child);
- }
- }
- }
- /* If all the children are redrawn make 'post draw' design */
- if(style->body.opa != LV_OPA_TRANSP) {
- obj->design_func(obj, &obj_ext_mask, LV_DESIGN_DRAW_POST);
- }
- }
- }
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