From b45be5817c725eac095f45a4f474bb5e0676d6bf Mon Sep 17 00:00:00 2001
From: Jonathan Watt <jwatt@jwatt.org>
Date: Fri, 11 Jul 2014 08:06:39 +0100
Subject: [PATCH] Bug 1025553, part 4 - Add some missing Moz2D Matrix API to
 gfxMatrix. r=Bas

---
 gfx/thebes/gfxMatrix.cpp | 16 ++++++++++++++++
 gfx/thebes/gfxMatrix.h   | 17 +++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/gfx/thebes/gfxMatrix.cpp b/gfx/thebes/gfxMatrix.cpp
index 2189982ef6ba..07bd3ce677e4 100644
--- a/gfx/thebes/gfxMatrix.cpp
+++ b/gfx/thebes/gfxMatrix.cpp
@@ -58,6 +58,22 @@ gfxMatrix::PreMultiply(const gfxMatrix& m)
     return *this;
 }
 
+/* static */ gfxMatrix
+gfxMatrix::Rotation(gfxFloat aAngle)
+{
+    gfxMatrix newMatrix;
+
+    gfxFloat s = sin(aAngle);
+    gfxFloat c = cos(aAngle);
+
+    newMatrix._11 = c;
+    newMatrix._12 = s;
+    newMatrix._21 = -s;
+    newMatrix._22 = c;
+
+    return newMatrix;
+}
+
 gfxPoint
 gfxMatrix::Transform(const gfxPoint& point) const
 {
diff --git a/gfx/thebes/gfxMatrix.h b/gfx/thebes/gfxMatrix.h
index 5d1e1cf7e214..2e54856c9590 100644
--- a/gfx/thebes/gfxMatrix.h
+++ b/gfx/thebes/gfxMatrix.h
@@ -144,6 +144,23 @@ public:
      */
     const gfxMatrix& PreMultiply(const gfxMatrix& m);
 
+    static gfxMatrix Translation(gfxFloat aX, gfxFloat aY)
+    {
+        return gfxMatrix(1.0, 0.0, 0.0, 1.0, aX, aY);
+    }
+
+    static gfxMatrix Translation(gfxPoint aPoint)
+    {
+        return Translation(aPoint.x, aPoint.y);
+    }
+
+    static gfxMatrix Rotation(gfxFloat aAngle);
+
+    static gfxMatrix Scaling(gfxFloat aX, gfxFloat aY)
+    {
+        return gfxMatrix(aX, 0.0, 0.0, aY, 0.0, 0.0);
+    }
+
     /**
      * Transforms a point according to this matrix.
      */