lv_draw_task_t

lightvgl_sys

Type Alias lv_draw_task_t 

Source 
pub type lv_draw_task_t = _lv_draw_task_t;
Expand description

TYPEDEFS

Aliased Type§

#[repr(C)]
pub struct lv_draw_task_t {
Show 13 fields
    pub next: *mut _lv_draw_task_t,
    pub type_: u32,
    pub area: lv_area_t,
    pub _real_area: lv_area_t,
    pub clip_area_original: lv_area_t,
    pub clip_area: lv_area_t,
    pub target_layer: *mut _lv_layer_t,
    pub draw_unit: *mut _lv_draw_unit_t,
    pub state: i32,
    pub draw_dsc: *mut c_void,
    pub opa: u8,
    pub preferred_draw_unit_id: u8,
    pub preference_score: u8,

}

Fields§

§next: *mut _lv_draw_task_t§type_: u32§area: lv_area_t

The area where to draw

§_real_area: lv_area_t

The real draw area. E.g. for shadow, outline, or transformed images it’s different from area

§clip_area_original: lv_area_t

The original area which is updated

§clip_area: lv_area_t

The clip area of the layer is saved here when the draw task is created. As the clip area of the layer can be changed as new draw tasks are added its current value needs to be saved. Therefore during drawing the layer’s clip area shouldn’t be used as it might be already changed for other draw tasks.

§target_layer: *mut _lv_layer_t§draw_unit: *mut _lv_draw_unit_t§state: i32§draw_dsc: *mut c_void

int instead of lv_draw_task_state_t to be sure its atomic

§opa: u8

Opacity of the layer

§preferred_draw_unit_id: u8

The ID of the draw_unit which should take this task

§preference_score: u8

Set to which extent preferred_draw_unit_id is good at this task. 80: means 20% better (faster) than software rendering 100: the default value 110: means 10% worse (slower) than software rendering