diff options
| -rwxr-xr-x | trunk/README-turbo.txt | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/trunk/README-turbo.txt b/trunk/README-turbo.txt index 24490e3..489c344 100755 --- a/trunk/README-turbo.txt +++ b/trunk/README-turbo.txt @@ -303,6 +303,14 @@ Fully supported: -- rdjpgcom: locale awareness +Partially supported: + +-- libjpeg: IDCT scaling extensions in decompressor + libjpeg-turbo supports IDCT scaling with scaling factors of 1/8, 1/4, 3/8, + 1/2, 5/8, 3/4, 7/8, 9/8, 5/4, 11/8, 3/2, 13/8, 7/4, 15/8, and 2/1, but only + 1/4 and 1/2 are SIMD-accelerated. + + Fully supported when using libjpeg v7/v8 emulation: -- libjpeg: In-memory source and destination managers @@ -313,10 +321,6 @@ Not supported: -- libjpeg: DCT scaling in compressor cinfo.scale_num and cinfo.scale_denom are silently ignored. --- libjpeg: IDCT scaling extensions in decompressor - libjpeg-turbo still supports IDCT scaling with scaling factors of 1/2, 1/4, - and 1/8 (same as libjpeg v6b.) - -- libjpeg: Fancy downsampling in compressor cinfo.do_fancy_downsampling is silently ignored. |