epeg

Insanely fast JPEG/JPG thumbnail scaling with the minimum fuss and CPU overhead. It makes use of libjpeg features of being able to load an image by only decoding the DCT coefficients needed to reconstruct an image of the size desired.

Forked from https://github.com/mattes/epeg

Bundles libjpeg-turbo 2.1.91.

Dependencies

For Linux see Dockerfile.

macOS:

brew install cmake nasm

Build

git clone https://github.com/koofr/epeg.git
cd epeg

mkdir build
cd build
cmake -DCMAKE_OSX_DEPLOYMENT_TARGET=10.14.6 ..
# this will create a ./dist folder
make install

Build in Docker

docker build -t epeg .
docker create --name epeg-copy epeg
mkdir out
cd out
docker cp epeg-copy:/epeg/dist/lib/libepeg.a libepeg_linux_amd64.a
docker cp epeg-copy:/epeg/dist/lib/libjpeg.a libjpeg_linux_amd64.a
docker cp epeg-copy:/epeg/dist/include/Epeg.h Epeg.h
docker rm epeg-copy

Run the example project

# make sure to build the project first
cd example
mkdir build
cd build
cmake ..
make
./rotatetest
./scaletest