tjpgd.rst

Tiny JPEG Decompressor (TJpgDec)

Allow the use of JPEG (JPG) images in LVGL.

Detailed introduction: TJpgDec

Overview

• JPEG is decoded in 8x8 tiles.
• Only baseline JPEG files are supported (no progressive JPEG support).
• Read from file and C array are implemented.
• Only the required portions of the JPEG images are decoded, therefore they can't be zoomed or rotated.

Usage

If enabled in lv_conf.h by :cLV_USE_TJPGD LVGL will register a new image decoder automatically so JPEG files can be used directly as image sources.

For example:

lv_image_set_src(my_img, "S:path/to/picture.jpg");

Note

a file system driver needs to be registered to open images from

files. Read more about overview_file_system or just enable one in lv_conf.h with LV_USE_FS_... config.

Converter

Converting JPEG to C array ~~~~~~~~~~~~~~~~~~~~~~~~~

• Use lvgl online tool https://lvgl.io/tools/imageconverter
• Color format = RAW, output format = C Array

Example

API

lv_tjpgd

tjpgd

tjpgdcnf