WIP RasterCanvasLayerAllocator

src/core/SkRasterCanvasLayerAllocator.cpp

Index: src/core/SkRasterCanvasLayerAllocator.cpp
diff --git a/src/core/SkRasterCanvasLayerAllocator.cpp b/src/core/SkRasterCanvasLayerAllocator.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..5e76000163ed9516dd26f68a9d970f169415794c
--- /dev/null
+++ b/src/core/SkRasterCanvasLayerAllocator.cpp
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkRasterCanvasLayerAllocator.h"
+
+#include "SkCanvas.h"
+#include "SkPaint.h"
+#include "SkRefCnt.h"
+
+SkRasterCanvasLayerAllocator::SkRasterCanvasLayerAllocator() { }
+
+SkRasterCanvasLayerAllocator::~SkRasterCanvasLayerAllocator() { }
+
+SkCanvas* SkRasterCanvasLayerAllocator::CreateCanvas(const SkImageInfo& info) {
+    SkBitmap bmp;
+    size_t rowBytes;
+    void* layer = this->allocateLayer(info, &rowBytes);
+    if (layer) {
+        bmp.installPixels(info, layer, rowBytes);
+    }
+    return new SkCanvas(bmp, sk_ref_sp(this));
+}
+
+