How can I perform hit-testing on Direct2D rectangle?

Question

I have successfully drawn a rectange using ID2D1HwndRenderTarget::FillRoundedRectangle(), as far as I know, I can do FillContainsPoint(), but it needs D2D1_MATRIX_3X2_F. How do I get the D2D1_MATRIX_3X2_F from a rectangle?

Answer 1

According to ID2D1Geometry::FillContainsPoint, D2D1_MATRIX_3X2_F is the transform to apply to this geometry prior to testing for containment. You can build up the transform if needed or NULL. See TouchHitTesting Microsoft sample.