lv_draw_sw_blend.h

Functions

void lv_draw_sw_blend(lv_draw_unit_t *draw_unit, const lv_draw_sw_blend_dsc_t *dsc)

Call the blend function of the layer.

参数:

draw_unit -- pointer to a draw unit
dsc -- pointer to an initialized blend descriptor

struct lv_draw_sw_blend_dsc_t

Public Members

const lv_area_t *blend_area: The area with absolute coordinates to draw on layer->buf will be clipped to layer->clip_area

const void *src_buf: Pointer to an image to blend. If set fill_color is ignored

uint32_t src_stride

lv_color_format_t src_color_format

const lv_area_t *src_area

lv_opa_t opa: The overall opacity

lv_color_t color: Fill color

const lv_opa_t *mask_buf: NULL if ignored, or an alpha mask to apply on blend_area

lv_draw_sw_mask_res_t mask_res: The result of the previous mask operation

const lv_area_t *mask_area: The area of mask_buf with absolute coordinates

int32_t mask_stride

lv_blend_mode_t blend_mode: E.g. LV_BLEND_MODE_ADDITIVE

struct _lv_draw_sw_blend_fill_dsc_t

Public Members

void *dest_buf

int32_t dest_w

int32_t dest_h

int32_t dest_stride

const lv_opa_t *mask_buf

int32_t mask_stride

lv_color_t color

lv_opa_t opa

struct _lv_draw_sw_blend_image_dsc_t

Public Members

void *dest_buf

int32_t dest_w

int32_t dest_h

int32_t dest_stride

const lv_opa_t *mask_buf

int32_t mask_stride

const void *src_buf

int32_t src_stride

lv_color_format_t src_color_format

lv_opa_t opa

lv_blend_mode_t blend_mode