SkMatrix

3x3 transforms

<!-- Updated Mar 4, 2011 -->

Skia is a 2D graphics engine, but it supports a full 3x3 transformation matrix. This allow it to draw anything (bitmaps, text, rectangles, paths) in perspective. SkCamera is a helper class that models a camera in 3D, and can be used to generate the proper matrix for a given 3D view of the plane.