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-rw-r--r--src/sksl/README4
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.