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Fix anti-burn when software rotation is enabled #764

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This commit is contained in:
fvanroie 2024-08-24 20:00:05 +02:00
parent e6eae8b391
commit ca346e868f
1 changed files with 26 additions and 15 deletions
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35
src/hasp/hasp.cpp
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@ -217,11 +217,12 @@ void hasp_antiburn_cb(lv_task_t* task)
lv_obj_t* layer = lv_disp_get_layer_sys(NULL);
if(layer) {
// Fill a buffer with random colors
lv_color_t color[1223];
size_t len = sizeof(color) / sizeof(color[0]);
for(size_t x = 0; x < len; x++) {
lv_color_t color[1223]; // prime
size_t max_len = sizeof(color) / sizeof(color[0]);
for(size_t x = 0; x < max_len; x++) {
color[x].full = HASP_RANDOM(UINT16_MAX);
}
max_len -= 64; // leave some headroom to randomize
// list of possible draw widths; prime numbers combat recurring patterns on the screen
uint8_t prime[] = {61, 67, 73, 79, 83, 89, 97, 103, 109, 113, 127, 131, 137, 139, 149,
@ -230,17 +231,27 @@ void hasp_antiburn_cb(lv_task_t* task)
lv_disp_t* disp = lv_disp_get_default();
lv_disp_drv_t* disp_drv = &disp->driver;
lv_coord_t scr_h = lv_obj_get_height(layer) - 1;
lv_coord_t scr_w = lv_obj_get_width(layer) - 1;
lv_coord_t w = 487; // first prime larger than 480
lv_coord_t scr_h;
lv_coord_t scr_w;
if(disp_drv->sw_rotate) {
scr_w = disp_drv->hor_res - 1; // use hardware w
scr_h = disp_drv->ver_res - 1; // use hardware h
} else {
scr_w = lv_obj_get_width(layer) - 1; // use software w
scr_h = lv_obj_get_height(layer) - 1; // use software h
}
lv_coord_t w = scr_w; // maximum screen width
lv_area_t area;
area.y1 = 0;
while(area.y1 <= scr_h) {
if(w > scr_w) w = scr_w; // limit to the actual screenwidth
if(w > len) w = len; // don't overrun the buffer
lv_coord_t h = len / w;
size_t headroom = len % w; // additional bytes in the buffer that can be used for a random offset
if(w > max_len) w = max_len; // don't overrun the buffer
lv_coord_t h = max_len / w;
size_t headroom = (sizeof(color) / sizeof(color[0])) -
(h * w); // additional bytes in the buffer that can be used for a random offset
area.y2 = area.y1 + h - 1;
if(area.y2 > scr_h) area.y2 = scr_h;
@ -255,17 +266,17 @@ void hasp_antiburn_cb(lv_task_t* task)
area.x1 += w;
}
w = prime[HASP_RANDOM(sizeof(prime))]; // new random width
w = prime[HASP_RANDOM(sizeof(prime) / sizeof(prime[0]))]; // new random width
area.y1 += h;
}
}
if(task->repeat_count != 1) return; // don't stop yet
// task is about to get deleted
if(task->repeat_count == 1) {
hasp_stop_antiburn();
dispatch_state_antiburn(HASP_EVENT_OFF);
}
}
/**
* Enable/Disable Anti Burn-in protection