lv_draw_sw_mask.h

Defines

LV_MASK_ID_INV
LV_MASK_MAX_NUM

Typedefs

typedef lv_draw_sw_mask_res_t (*lv_draw_sw_mask_xcb_t)(lv_opa_t *mask_buf, int32_t abs_x, int32_t abs_y, int32_t len, void *p)

A common callback type for every mask type. Used internally by the library.

Enums

enum lv_draw_sw_mask_res_t

Values:

enumerator LV_DRAW_SW_MASK_RES_TRANSP
enumerator LV_DRAW_SW_MASK_RES_FULL_COVER
enumerator LV_DRAW_SW_MASK_RES_CHANGED
enumerator LV_DRAW_SW_MASK_RES_UNKNOWN
enum lv_draw_sw_mask_type_t

Values:

enumerator LV_DRAW_SW_MASK_TYPE_LINE
enumerator LV_DRAW_SW_MASK_TYPE_ANGLE
enumerator LV_DRAW_SW_MASK_TYPE_RADIUS
enumerator LV_DRAW_SW_MASK_TYPE_FADE
enumerator LV_DRAW_SW_MASK_TYPE_MAP
enum lv_draw_sw_mask_line_side_t

Values:

enumerator LV_DRAW_SW_MASK_LINE_SIDE_LEFT
enumerator LV_DRAW_SW_MASK_LINE_SIDE_RIGHT
enumerator LV_DRAW_SW_MASK_LINE_SIDE_TOP
enumerator LV_DRAW_SW_MASK_LINE_SIDE_BOTTOM

Functions

void lv_draw_sw_mask_init(void)
void lv_draw_sw_mask_deinit(void)
void lv_draw_sw_mask_free_param(void *p)

Free the data from the parameter. It's called inside lv_draw_sw_mask_remove_id and lv_draw_sw_mask_remove_custom Needs to be called only in special cases when the mask is not added by lv_draw_mask_add and not removed by lv_draw_mask_remove_id or lv_draw_mask_remove_custom

参数:

p -- pointer to a mask parameter

void lv_draw_sw_mask_line_points_init(lv_draw_sw_mask_line_param_t *param, int32_t p1x, int32_t p1y, int32_t p2x, int32_t p2y, lv_draw_sw_mask_line_side_t side)

Initialize a line mask from two points.

参数:

  • param -- pointer to a lv_draw_mask_param_t to initialize

  • p1x -- X coordinate of the first point of the line

  • p1y -- Y coordinate of the first point of the line

  • p2x -- X coordinate of the second point of the line

  • p2y -- y coordinate of the second point of the line

  • side -- and element of lv_draw_mask_line_side_t to describe which side to keep. With LV_DRAW_MASK_LINE_SIDE_LEFT/RIGHT and horizontal line all pixels are kept With LV_DRAW_MASK_LINE_SIDE_TOP/BOTTOM and vertical line all pixels are kept

void lv_draw_sw_mask_line_angle_init(lv_draw_sw_mask_line_param_t *param, int32_t p1x, int32_t py, int16_t angle, lv_draw_sw_mask_line_side_t side)

Initialize a line mask from a point and an angle.

参数:

  • param -- pointer to a lv_draw_mask_param_t to initialize

  • px -- X coordinate of a point of the line

  • py -- X coordinate of a point of the line

  • angle -- right 0 deg, bottom: 90

  • side -- and element of lv_draw_mask_line_side_t to describe which side to keep. With LV_DRAW_MASK_LINE_SIDE_LEFT/RIGHT and horizontal line all pixels are kept With LV_DRAW_MASK_LINE_SIDE_TOP/BOTTOM and vertical line all pixels are kept

void lv_draw_sw_mask_angle_init(lv_draw_sw_mask_angle_param_t *param, int32_t vertex_x, int32_t vertex_y, int32_t start_angle, int32_t end_angle)

Initialize an angle mask.

参数:

  • param -- pointer to a lv_draw_mask_param_t to initialize

  • vertex_x -- X coordinate of the angle vertex (absolute coordinates)

  • vertex_y -- Y coordinate of the angle vertex (absolute coordinates)

  • start_angle -- start angle in degrees. 0 deg on the right, 90 deg, on the bottom

  • end_angle -- end angle

void lv_draw_sw_mask_radius_init(lv_draw_sw_mask_radius_param_t *param, const lv_area_t *rect, int32_t radius, bool inv)

Initialize a fade mask.

参数:

  • param -- pointer to an lv_draw_mask_radius_param_t to initialize

  • rect -- coordinates of the rectangle to affect (absolute coordinates)

  • radius -- radius of the rectangle

  • inv -- true: keep the pixels inside the rectangle; keep the pixels outside of the rectangle

void lv_draw_sw_mask_fade_init(lv_draw_sw_mask_fade_param_t *param, const lv_area_t *coords, lv_opa_t opa_top, int32_t y_top, lv_opa_t opa_bottom, int32_t y_bottom)

Initialize a fade mask.

参数:

  • param -- pointer to a lv_draw_mask_param_t to initialize

  • coords -- coordinates of the area to affect (absolute coordinates)

  • opa_top -- opacity on the top

  • y_top -- at which coordinate start to change to opacity to opa_bottom

  • opa_bottom -- opacity at the bottom

  • y_bottom -- at which coordinate reach opa_bottom.

void lv_draw_sw_mask_map_init(lv_draw_sw_mask_map_param_t *param, const lv_area_t *coords, const lv_opa_t *map)

Initialize a map mask.

参数:

  • param -- pointer to a lv_draw_mask_param_t to initialize

  • coords -- coordinates of the map (absolute coordinates)

  • map -- array of bytes with the mask values