Introduce Property Trees
Based of Andrew's work: crrev.com/642833002
This patch creates a transform and a clip tree and computes
visual content rects based on those.
BUG=386786
Review URL: https://codereview.chromium.org/687873004
Cr-Commit-Position: refs/heads/master@{#308724}
diff --git a/ui/gfx/transform.h b/ui/gfx/transform.h
index eeb66206..85bab694 100644
--- a/ui/gfx/transform.h
+++ b/ui/gfx/transform.h
@@ -122,6 +122,11 @@
// Returns true if the matrix is either identity or pure translation.
bool IsIdentityOrTranslation() const { return matrix_.isTranslate(); }
+ // Returns true if the matrix is either the identity or a 2d translation.
+ bool IsIdentityOr2DTranslation() const {
+ return matrix_.isTranslate() && matrix_.get(2, 3) == 0;
+ }
+
// Returns true if the matrix is either identity or pure translation,
// allowing for an amount of inaccuracy as specified by the parameter.
bool IsApproximatelyIdentityOrTranslation(SkMScalar tolerance) const;
