Ogljpeg Code
JPEG decompression accelerated on GPU using OpenGL compute shaders
Status: Alpha
Brought to you by:
ondra91
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Ogljpeg
=======
Ogljpeg is library for baseline JPEG decompression on GPU.
This package contains C and GLSL source code for accellerated
JPEG docding using GPU. It implements JPEG baseline decoding
process. Utility for lossles format conversion is included.
Measurement tool is also included.
Library
=======
It requires at least OpenGL 4.3 and needs to be linked against
libGL and libGLEW.
Interface
---------
Ogljpeg's API is fairly simple and it consists of few basic functions
which should become available after including ogljpeg.h.
Workflow
--------
This is simple ogljpeg workflow which should be followed for jpeg decoding.
ogljpegInit();
repeat:
(read jpeg file into memory)
jreadOpenMemory();
ogljpeg2tex();
jreadFree();
ogljpegFree();
Utility for lossless conversion
===============================
Implementation is mostly based on libjpeg's jdtrans and even uses some
of libjpeg's files (libjpeg source codes available on http://www.ijg.org/files).
Usage:
./ogljpeg_converter <input file> [<output file>]
If output file isn't specified then input file is overwritten.
Measurement tool
================
./jpeg [-s <N>] [-c|-g] [-x] [-i] [-p] -f <file>
-s <N> How many samples should be use for value averaging
(default is 1)
-c Decompress using CPU (uses available libjpeg library)
-g Decompress using GPU (default)
-x Exit after <N> samples
-p Print progress (number of actual sample)
