From: DRC Date: Fri, 4 Mar 2011 13:46:55 +0000 (+0000) Subject: git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@507 632fc199-4ca6... X-Git-Tag: 1.1.90~157 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=15866ac1da852acfbba949faa076315078572579;p=libjpeg-turbo git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@507 632fc199-4ca6-4c93-a231-07263d6284db --- diff --git a/ChangeLog.txt b/ChangeLog.txt index 27fd925..0228116 100644 --- a/ChangeLog.txt +++ b/ChangeLog.txt @@ -5,6 +5,25 @@ [2] TurboJPEG/OSS can now scale down images during decompression. +[3] Added SIMD routines for RGB-to-grayscale color conversion, which +significantly improves the performance of grayscale JPEG compression from an +RGB source image. + +[4] Improved performance for non-x86 machines. + +[5] Added a function to the TurboJPEG API which performs lossless transforms. +This function uses the same back end as jpegtran, but it performs transcoding +entirely in memory and allows multiple transforms and/or crop operations to be +batched together, so the source coefficients only need to be read once. This +is useful when generating image tiles from a single source JPEG. + +[6] Modified jpgtest to benchmark the new scaled decompression and lossless +transform features in TurboJPEG/OSS. + +[7] Added support for 4:4:0 (transposed 4:2:2) subsampling in TurboJPEG, which +was necessary in order for it to read 4:2:2 JPEG files that had been losslessly +transposed or rotated 90 degrees. + 1.1.1 =====