Forward fill and stroke styles from 2d canvas to canvas filters

third_party/WebKit/Source/modules/canvas2d/CanvasStyle.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 117 matching lines @@
 }
 
 RGBA32 CanvasStyle::paintColor() const
 {
     if (m_type == ColorRGBA)
         return m_rgba;
     ASSERT(m_type == Gradient || m_type == ImagePattern);
     return Color::black;
 }
 
+PassRefPtr<SkShader> CanvasStyle::asShader() const
+{
+    switch (m_type) {
+    case ColorRGBA:
+        return adoptRef(SkShader::CreateColorShader(m_rgba));
+    case Gradient: {
+        SkPaint paint;
+        canvasGradient()->gradient()->applyToPaint(paint);
+        return paint.getShader();
+    }
+    case ImagePattern: {
+        SkPaint paint;
+        canvasPattern()->pattern()->applyToPaint(paint);
+        return paint.getShader();
+    }
+    default:
+        ASSERT_NOT_REACHED();
+    }
+    return nullptr;
+}
+
 DEFINE_TRACE(CanvasStyle)
 {
     visitor->trace(m_gradient);
     visitor->trace(m_pattern);
 }
 
 }