diff options
| author |  Chris Dalton <csmartdalton@google.com> | 2018-07-27 12:38:35 -0600 |
|---|---|---|
| committer |  Skia Commit-Bot <skia-commit-bot@chromium.org> | 2018-07-27 19:04:46 +0000 |
| commit | 49d14e98fe43fdff818e7571c1a61cd5045fedc0 (patch) | |
| tree | 18d48cd1922c646b6dafa851fbe214c8904aef87 /src/sksl/README | |
| parent | f4f6bbfadac327619a3832acad9c8afe06629b55 (diff) | |
sksl: Add a "sk_Clockwise" built-in
This allows us to identify clockwise-winding triangles, in terms of
Skia device space, in all backends and with all render target origins.
Bug: skia:
Change-Id: I220e1c459e0129d1cc4dee6458ef94277fbedd21
Reviewed-on: https://skia-review.googlesource.com/142662
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Diffstat (limited to 'src/sksl/README')
| -rw-r--r-- | src/sksl/README | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/sksl/README b/src/sksl/README index bb2dd05396..dd0af9825f 100644 --- a/src/sksl/README +++ b/src/sksl/README @@ -45,6 +45,8 @@ Differences from GLSL * use sk_InstanceID instead of gl_InstanceID * the fragment coordinate is sk_FragCoord, and is always relative to the upper left. +* use sk_Clockwise instead of gl_FrontFacing. This is always relative to an + upper left origin. * you do not need to include ".0" to make a number a float (meaning that "float2(x, y) * 4" is perfectly legal in SkSL, unlike GLSL where it would often have to be expressed "float2(x, y) * 4.0". There is no performance @@ -149,4 +151,4 @@ Creating a new .fp file 7. At this point you can reference the new fragment processor from within Skia. Once you have done this initial setup, simply re-build Skia to pick up any -changes to the .fp file.
\ No newline at end of file +changes to the .fp file. |