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Mike Klein c66373d897 tweak mul/mad_unorm8
Using the approximation (x*y+x)/256 is slightly
faster than (x*y+255)/256 while still maintaining
the property that it's never off by more than a bit.

In the interpreter this saves ~0.1 ns/px when used,
and is also nice for JITting because it doesn't need
any constant registers.

(x*y+y)/256 works just as well, of course.

Change-Id: Ic946e26f0d22c602dfa7e8fa0d64bf87db5505ac
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/219917
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2019-06-10 16:35:07 +00:00
animations first cut at a checkbox 2009-10-21 19:41:10 +00:00
bench Revert "SkParagraph" 2019-06-10 13:16:53 +00:00
bin SkQP: new docker test code 2019-04-19 18:50:03 +00:00
dm Make color initialization version of createBackendTexture public 2019-06-04 20:12:22 +00:00
docker Include wasm debugger in continuous build part 2 2019-04-01 19:51:43 +00:00
docs/examples PDF example 2019-05-28 17:21:59 +00:00
example Use SkTextEncoding enum instead of macros. 2019-05-07 20:54:16 +00:00
experimental run rewrite_includes.py 2019-06-06 17:11:02 +00:00
fuzz Make fuzzing use embedded test font 2019-06-03 16:29:21 +00:00
gm Make GL & Vk backends create uninitialized backend textures 2019-06-10 16:27:07 +00:00
gn Revert "SkParagraph" 2019-06-10 13:16:53 +00:00
include Make GL & Vk backends create uninitialized backend textures 2019-06-10 16:27:07 +00:00
infra Roll recipe dependencies (trivial). 2019-06-10 15:36:23 +00:00
modules [skottie] Range selector cleanup pass 2019-06-10 14:58:10 +00:00
platform_tools rewrite includes to not need so much -Ifoo 2019-04-24 16:27:11 +00:00
resources revise extract instruction 2019-06-10 15:08:19 +00:00
samplecode Revert "SkParagraph" 2019-06-10 13:16:53 +00:00
site Make fuzzing use embedded test font 2019-06-03 16:29:21 +00:00
specs [img-decode] Start on proposed new spec 2019-05-06 17:39:19 +00:00
src tweak mul/mad_unorm8 2019-06-10 16:35:07 +00:00
tests Make GL & Vk backends create uninitialized backend textures 2019-06-10 16:27:07 +00:00
third_party Roll skia/third_party/skcms 386ae89d2b64..ed2c978cdeef (1 commits) 2019-06-07 17:14:43 +00:00
tools Make GL & Vk backends create uninitialized backend textures 2019-06-10 16:27:07 +00:00
.clang-format restore .clang-format 2019-03-21 15:52:32 +00:00
.clang-tidy add google-build-namespaces to clang-tidy checks 2018-12-12 16:33:59 +00:00
.gitignore clean up some .gitignores 2019-05-15 19:55:45 +00:00
.gn Basic standalone GN configs. 2016-07-21 12:25:45 -07:00
AUTHORS Fix use of 'is' operator for comparison 2019-05-07 14:22:15 +00:00
BUILD.gn Revert "SkParagraph" 2019-06-10 13:16:53 +00:00
codereview.settings Make uploading to Gerrit the default for Skia 2016-11-09 19:07:56 +00:00
CONTRIBUTING Fix references to https://sites.google.com/site/skiadocs/. 2015-02-03 13:12:54 -02:00
CQ_COMMITTERS Moved committer list to chrome-infra-auth and deleted it from the repo 2015-09-02 13:37:54 -07:00
DEPS Roll third_party/externals/angle2 ea49f6f5d4e3..2d0a9acb0551 (7 commits) 2019-06-10 15:03:14 +00:00
go.mod [infra] Pin infra code using Go modules 2019-05-06 17:53:19 +00:00
go.sum [infra] Pin infra code using Go modules 2019-05-06 17:53:19 +00:00
LICENSE BUG=skia:5602 2016-09-02 11:19:34 -07:00
OWNERS add OWNERS file 2017-12-01 19:50:19 +00:00
PRESUBMIT.py add mtklein to api approvals 2019-04-02 15:16:56 +00:00
public.bzl Adding skparagraphto public.bzl 2019-06-10 15:48:14 +00:00
README Fix references to https://sites.google.com/site/skiadocs/. 2015-02-03 13:12:54 -02:00
README.chromium Update README.chromium. 2015-06-11 13:19:24 -07:00
whitespace.txt Whitespace test 2019-05-18 13:05:29 +00:00

Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.

See full details, and build instructions, at https://skia.org.