From 771563baee373ec9ea67c37a9e3ab4cbc48f3400 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Tue, 3 Apr 2012 11:50:19 +0000
Subject: [PATCH] Added wxGraphicsContext::CreateMatrix(wxAffineMatrix2D)
 overload.

Make it easy to convert generic wxAffineMatrix2D to native wxGraphicsMatrix.

Closes #13188.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71085 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/graphics.h   | 10 ++++++++++
 interface/wx/graphics.h |  8 ++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/wx/graphics.h b/include/wx/graphics.h
index d385d7db02..ad0206e2d3 100644
--- a/include/wx/graphics.h
+++ b/include/wx/graphics.h
@@ -510,6 +510,16 @@ public:
     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
         wxDouble tx=0.0, wxDouble ty=0.0) const;
 
+    wxGraphicsMatrix CreateMatrix( const wxAffineMatrix2DBase& mat ) const
+    {
+        wxMatrix2D mat2D;
+        wxPoint2DDouble tr;
+        mat.Get(&mat2D, &tr);
+
+        return CreateMatrix(mat2D.m_11, mat2D.m_12, mat2D.m_21, mat2D.m_22,
+                            tr.m_x, tr.m_y);
+    }
+
     // push the current state of the context, ie the transformation matrix on a stack
     virtual void PushState() = 0;
 
diff --git a/interface/wx/graphics.h b/interface/wx/graphics.h
index d2104f4425..912763c38f 100644
--- a/interface/wx/graphics.h
+++ b/interface/wx/graphics.h
@@ -512,6 +512,14 @@ public:
                                           wxDouble tx = 0.0,
                                           wxDouble ty = 0.0) const;
 
+    /**
+        Creates a native affine transformation matrix from the passed
+        generic one.
+
+        @since 2.9.4
+    */
+    wxGraphicsMatrix CreateMatrix(const wxAffineMatrix2DBase& mat) const;
+
     /**
         Creates a native graphics path which is initially empty.
     */