WebP Decoder

libwebp is an LVGL interface to the WebP image format --- a modern image format that provides superior lossless and lossy compression for images on the web.

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libwebp is an LVGL interface to the WebP image format --- a modern image format that provides superior lossless and lossy compression for images on the web. WebP offers:

Smaller file sizes compared to JPEG and PNG
Lossy compression with transparency
Lossless compression
Animation support (not yet supported in the LVGL integration)

For more information, see: https://developers.google.com/speed/webp

Library source: https://github.com/webmproject/libwebp

Install

bash

# Linux
sudo apt install libwebp-dev
# macOS
brew install webp

Adding libwebp to Your Project

CMake configuration:

cmake

find_package(PkgConfig REQUIRED)
pkg_check_modules(WebP REQUIRED libwebp)
include_directories(${WebP_INCLUDEDIR})
target_link_libraries(main ${WebP_LINK_LIBRARIES})

Usage

Set LV_USE_LIBWEBP in lv_conf.h to 1.

Memory requirements for WebP images:

Lossy WebP: width × height × 4 bytes (ARGB8888 format)
Lossless WebP: width × height × 4 bytes (ARGB8888 format)

For optimal memory usage, combine with LVGL's Image Caching feature.

Example

Open a WEBP image from file and variable

lv_example_libwebp_1.c