diff options
| author |  benjaminwagner <benjaminwagner@google.com> | 2016-01-14 18:13:32 -0800 |
|---|---|---|
| committer |  Commit bot <commit-bot@chromium.org> | 2016-01-14 18:13:32 -0800 |
| commit | 0a35620a16b368356888d15771392fb00cbb777d (patch) | |
| tree | bf980c58cedc65b67416099188d9763c68e7ec4f | |
| parent | c55f699e8b01644b49dddfc21bfb538f1a5ed06a (diff) | |
Add optimize_coding setting for JPEG encoding.
Produces smaller encoded output at the expense of encoding time. No visual differences.
sample image 1 (RGB gradients):
default (80): 2.5x slower, 34% smaller
quality 0: 1.7x slower, 52% smaller
quality 20: 2.1x slower, 55% smaller
quality 40: 2.3x slower, 37% smaller
quality 60: 2.5x slower, 36% smaller
quality 100: 3.9x slower, 22% smaller
sample image 2 (photo):
default (80): 2x slower, 8% smaller
quality 0: 1.5x slower, 49% smaller
quality 20: 1.7x slower, 22% smaller
quality 40: 1.9x slower, 15% smaller
quality 60: 1.9x slower, 11% smaller
quality 100: 2x slower, 9% smaller
BUG=skia:3460
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1589593002
Review URL: https://codereview.chromium.org/1589593002
| -rw-r--r-- | src/images/SkImageDecoder_libjpeg.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/images/SkImageDecoder_libjpeg.cpp b/src/images/SkImageDecoder_libjpeg.cpp index 0d02a658f2..6a032fdb96 100644 --- a/src/images/SkImageDecoder_libjpeg.cpp +++ b/src/images/SkImageDecoder_libjpeg.cpp @@ -958,6 +958,7 @@ protected: cinfo.input_gamma = 1; jpeg_set_defaults(&cinfo); + cinfo.optimize_coding = TRUE; jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */); #ifdef DCT_IFAST_SUPPORTED cinfo.dct_method = JDCT_IFAST; |