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SourceVuESP-IDF Framework and Examplesi80_controller samplelv_draw_buf_dup_ex()

lv_draw_buf_dup_ex() function

Duplicate a draw buf with same image size, stride and color format. Copy the image data too.

Syntax

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Summary

Declaration

Definition

from lv_draw_buf.h:252

lv_draw_buf_t * lv_draw_buf_dup_ex(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf);

Implemented in lv_draw_buf.c:320

Arguments

Argument

Description

handlers

the draw buffer handlers

draw_buf

the draw buf to duplicate

Return value

the duplicated draw buf on success, NULL if failed

References

Code

Location

Referrer

lv_draw_buf_t * lv_draw_buf_dup_ex(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf)

lv_draw_buf.c:320

lv_draw_buf_t * lv_draw_buf_dup_ex(const lv_draw_buf_handlers_t * handlers, const lv_draw_buf_t * draw_buf);

lv_draw_buf.h:252

return lv_draw_buf_dup_ex(&default_handlers, draw_buf);

lv_draw_buf.c:317

lv_draw_buf_dup()

decoded = lv_draw_buf_dup_ex(image_cache_draw_buf_handlers, decoded);

lv_image_decoder.c:276

lv_image_decoder_post_process()

Call Tree

lv_draw_buf_dup_ex() is called by 2 functions and calls 2 functions:

lv_draw_buf_dup()

lv_image_decoder_post_process()

lv_draw_buf_dup_ex()

lv_memcpy()

lv_draw_buf_create_ex()

Data Use

lv_draw_buf_dup_ex() reads 10 variables and writes 1 variable:

lv_draw_buf_t::header

lv_image_flags_t::LV_IMAGE_FLAGS_MODIFIABLE

lv_image_header_t::cf

lv_image_header_t::flags

lv_image_header_t::w

lv_image_header_t::h

lv_image_header_t::stride

lv_image_flags_t::LV_IMAGE_FLAGS_ALLOCATED

lv_draw_buf_t::data_size

lv_draw_buf_t::data

lv_draw_buf_dup_ex()

lv_image_header_t::flags

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