lv_draw_sw_mask_apply() function

@cond Doxygen_Suppress Apply the added buffers on a line. Used internally by the library's drawing routines.

Syntax

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Declaration

Definition

from lv_draw_sw_mask.h:89

lv_draw_sw_mask_res_t lv_draw_sw_mask_apply(void * masks[], lv_opa_t * mask_buf, int32_t abs_x, int32_t abs_y, int32_t len);

Implemented in lv_draw_sw_mask.c:91

Arguments

Argument

Description

masks

the masks list to apply, must be ended with NULL pointer in array.

mask_buf

store the result mask here. Has to be `len` byte long. Should be initialized with `0xFF`.

abs_x

absolute X coordinate where the line to calculate start

abs_y

absolute Y coordinate where the line to calculate start

len

length of the line to calculate (in pixel count)

Return value

One of these values: - `LV_DRAW_MASK_RES_FULL_TRANSP`: the whole line is transparent. `mask_buf` is not set to zero - `LV_DRAW_MASK_RES_FULL_COVER`: the whole line is fully visible. `mask_buf` is unchanged - `LV_DRAW_MASK_RES_CHANGED`: `mask_buf` has changed, it shows the desired opacity of each pixel in the given line

Examples

References

from examples

lv_draw_sw_mask_apply() function

Syntax

Arguments

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