README.md

In jeroen/webp: A New Format for Lossless and Lossy Image Compression

webp

A New Format for Lossless and Lossy Image Compression

Lossless webp images are 26% smaller in size compared to PNG. Lossy webp images are 25-34% smaller in size compared to JPEG. This package reads and writes webp images into a 3 (rgb) or 4 (rgba) channel bitmap array using conventions from the 'jpeg' and 'png' packages.

Hello World

# Convert to webp
library(png)
img <- readPNG(system.file("img", "Rlogo.png", package="png"))
write_webp(img, "rlogo.webp")
browseURL("rlogo.webp")
rm(img)

# Convert from webp
library(jpeg)
img <- read_webp("rlogo.webp")
writeJPEG(img, "rlogo.jpeg")
browseURL("rlogo.jpeg")

Installation

Binary packages for OS-X or Windows can be installed directly from CRAN:

install.packages("webp")

Installation from source on Linux or OSX requires libwebp. On Debian or Ubuntu install libwebp-dev:

sudo apt-get install -y libwebp-dev

On Fedora we need libwebp-devel:

sudo yum install libwebp-devel
````

On __CentOS / RHEL__ we install [libwebp-devel](https://src.fedoraproject.org/rpms/libwebp) via EPEL:

sudo yum install epel-release sudo yum install libwebp-devel

On __OS-X__ use [webp](https://github.com/Homebrew/homebrew-core/blob/master/Formula/webp.rb) from Homebrew:

brew install webp ```

jeroen/webp documentation built on Oct. 2, 2023, 11:58 a.m.