Use SkMatrix44 for the underlying implementation of ui::Transform

ui/gfx/compositor/compositor_win.cc

Index: ui/gfx/compositor/compositor_win.cc
diff --git a/ui/gfx/compositor/compositor_win.cc b/ui/gfx/compositor/compositor_win.cc
index ddb978761cb7ed8b271bc7c87cc4c1f81e03a11a..1793e24c2d141515311e67543723548197f621c9 100644
--- a/ui/gfx/compositor/compositor_win.cc
+++ b/ui/gfx/compositor/compositor_win.cc
@@ -351,20 +351,13 @@ void CompositorWin::Init() {
 void CompositorWin::UpdatePerspective(const ui::Transform& transform,
                                       const gfx::Size& view_size) {
   // Apply transform from view.
-  const SkMatrix& sk_matrix(transform.matrix());
+  const SkMatrix44& m(transform.matrix());
   // Use -1 * kMTransY for y-translation as origin for views is upper left.
   D3DXMATRIX transform_matrix(
-      // row 1
-      sk_matrix[SkMatrix::kMScaleX], sk_matrix[SkMatrix::kMSkewX], 0.0f,
-      sk_matrix[SkMatrix::kMPersp0],
-      // row 2
-      sk_matrix[SkMatrix::kMSkewY], sk_matrix[SkMatrix::kMScaleY], 0.0f,
-      sk_matrix[SkMatrix::kMPersp1],
-      // row 3
-      0.0f, 0.0f, 1.0f, sk_matrix[SkMatrix::kMPersp2],
-      // row 4.
-      sk_matrix[SkMatrix::kMTransX], -sk_matrix[SkMatrix::kMTransY], 0.0f,
-      1.0f);
+      m.get(0,0), m.get(1,0), m.get(2,0), m.get(3,0),

[rjkroege, 2011/06/10 17:52:14]

same comment as the GL case. Is there not a way to construct this without
copying all 16 values?

+      m.get(0,1), m.get(1,1), m.get(2,1), m.get(3,1),
+      m.get(0,2), m.get(1,2), m.get(2,2), m.get(3,2),
+      m.get(0,3), m.get(1,3), m.get(2,3), m.get(3,3));
 
   // Scale so x and y are from 0-2.
   D3DXMATRIX scale_matrix;