Index: third_party/WebKit/Source/modules/csspaint/README.md |
diff --git a/third_party/WebKit/Source/modules/csspaint/README.md b/third_party/WebKit/Source/modules/csspaint/README.md |
index 926274472e6b4981aadbef3fbbcebc131f799f92..860623bbe5e8c18aa3aaef7e77be6eb1658951b1 100644 |
--- a/third_party/WebKit/Source/modules/csspaint/README.md |
+++ b/third_party/WebKit/Source/modules/csspaint/README.md |
@@ -49,6 +49,15 @@ This method returns the `PaintGeneratedImage`. |
The `SkPicture` is produced from a `RecordingImageBufferSurface`. |
+### Style Invalidation |
+ |
+The `CSSPaintDefinition` keeps a list of both native and custom properties it will invalidate on. |
+During style invalidation `ComputedStyle` checks if it has any `CSSPaintValue`s, and if any of their |
+properties have changed; if so it will invalidate paint for that `ComputedStyle`. |
+ |
+If the `CSSPaintValue` doesn't have a corresponding `CSSPaintDefinition` yet, it doesn't invalidate |
+paint. |
+ |
## Testing |
Tests live [here](../../../LayoutTests/csspaint/). |