mirror of
https://git.FreeBSD.org/ports.git
synced 2024-12-12 03:00:28 +00:00
21 lines
988 B
Plaintext
21 lines
988 B
Plaintext
|
libjpeg-turbo is a high-speed version of libjpeg for x86 and x86-64 processors
|
||
|
|
which uses SIMD instructions (MMX, SSE2, etc.) to accelerate baseline JPEG
|
||
|
|
compression and decompression.
|
||
|
|
libjpeg-turbo is generally 2-4x as fast as the unmodified version
|
||
|
|
of libjpeg, all else being equal.
|
||
|
|
|
||
|
|
libjpeg-turbo was originally based on libjpeg/SIMD by Miyasaka Masaru,
|
||
|
|
but the TigerVNC and VirtualGL projects made numerous enhancements to the codec,
|
||
|
|
including improved support for Mac OS X, 64-bit support,
|
||
|
|
support for 32-bit and big endian pixel formats (RGBA, ABGR, etc.),
|
||
|
|
accelerated Huffman encoding/decoding, and various bug fixes.
|
||
|
|
The goal was to produce a fully open source codec that could replace
|
||
|
|
the partially closed source TurboJPEG/IPP codec used by VirtualGL and TurboVNC.
|
||
|
|
libjpeg-turbo generally achieves 80-120% of the performance of TurboJPEG/IPP.
|
||
|
|
It is faster in some areas but slower in others.
|
||
|
|
|
||
|
|
WWW: http://libjpeg-turbo.virtualgl.org/
|
||
|
|
|
||
|
|
- D. R. Commander
|
||
|
|
information@virtualgl.org
|