Add RAW decoding support to Skia

src/codec/SkRawAdapterCodec.cpp

+/*
+ * 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 "SkCodec.h"
+#include "SkCodecPriv.h"
+#include "SkRawAdapterCodec.h"
+
+SkRawAdapterCodec::SkRawAdapterCodec(SkRawCodec* codec)
+    : INHERITED(codec)
+{}
+
+SkISize SkRawAdapterCodec::onGetSampledDimensions(int sampleSize) const {
+    float scale = 1.f / static_cast<float>(sampleSize);
+    return this->codec()->getScaledDimensions(scale);
+}
+
+SkCodec::Result SkRawAdapterCodec::onGetAndroidPixels(
+        const SkImageInfo& info, void* pixels, size_t rowBytes,
+        const AndroidOptions& options) {
+    SkCodec::Options codecOptions;
+    codecOptions.fZeroInitialized = options.fZeroInitialized;
+    codecOptions.fSubset = options.fSubset;
+    return this->codec()->getPixels(
+        info, pixels, rowBytes, &codecOptions, options.fColorPtr,
+        options.fColorCount);
+}