libjpeg-turbo Decoder

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libjpeg-turbo is an LVGL interface to the libjpeg-turbo library --- a JPEG image codec that uses SIMD instructions to accelerate baseline JPEG compression and decompression on x86, x86-64, Arm, PowerPC, and MIPS systems, as well as progressive JPEG compression on x86, x86-64, and Arm systems.

On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal.

For a detailed introduction, see: https://libjpeg-turbo.org .

Library source: https://github.com/libjpeg-turbo/libjpeg-turbo

Install

bash

sudo apt install libjpeg-turbo8-dev

Adding libjpeg-turbo to Your Project

Cmake:

cmake

find_package(JPEG REQUIRED)
include_directories(${JPEG_INCLUDE_DIR})
target_link_libraries(${PROJECT_NAME} PRIVATE ${JPEG_LIBRARIES})

Usage

Set LV_USE_LIBJPEG_TURBO in lv_conf.h to 1.

See the examples below.

It should be noted that each image decoded needs to consume:

image width × image height × 3

bytes of RAM, and it needs to be combined with the Image Caching feature to ensure that the memory usage is within a reasonable range.

Example

Load a JPG image

lv_example_libjpeg_turbo_1.c