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Diffstat (limited to 'graphics/jpeg-turbo/pkg-descr')
| -rw-r--r-- | graphics/jpeg-turbo/pkg-descr | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/graphics/jpeg-turbo/pkg-descr b/graphics/jpeg-turbo/pkg-descr new file mode 100644 index 000000000000..b4a2d1e103be --- /dev/null +++ b/graphics/jpeg-turbo/pkg-descr @@ -0,0 +1,20 @@ +This is a drop-in replacement for the graphics/jpeg library. It does not +include libturbojpeg.so (see graphics/libjpeg-turbo). + +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/ |