Restore SkLightingShader and associated classes

This reverts https://skia-review.googlesource.com/c/skia/+/31140 (Remove SkLightingShader and associated classes) and updates the classes to ToT

Change-Id: I3b1df1704cca8907aa00f081a7e93339b65ad4fa
Reviewed-on: https://skia-review.googlesource.com/141545
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/src/core/SkNormalFlatSource.h b/src/core/SkNormalFlatSource.h
new file mode 100644
index 0000000000..9303ba10af
--- /dev/null
+++ b/src/core/SkNormalFlatSource.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkNormalFlatSource_DEFINED
+#define SkNormalFlatSource_DEFINED
+
+#include "SkNormalSource.h"
+
+class SK_API SkNormalFlatSourceImpl : public SkNormalSource {
+public:
+    SkNormalFlatSourceImpl(){}
+
+#if SK_SUPPORT_GPU
+    std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs& args) const override;
+#endif
+
+    SkNormalSource::Provider* asProvider(const SkShaderBase::ContextRec& rec,
+                                         SkArenaAlloc* alloc) const override;
+
+    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkNormalFlatSourceImpl)
+
+protected:
+    void flatten(SkWriteBuffer& buf) const override;
+
+private:
+    class Provider : public SkNormalSource::Provider {
+    public:
+        Provider();
+
+        ~Provider() override;
+
+        void fillScanLine(int x, int y, SkPoint3 output[], int count) const override;
+
+    private:
+        typedef SkNormalSource::Provider INHERITED;
+    };
+
+    friend class SkNormalSource;
+
+    typedef SkNormalSource INHERITED;
+};
+
+#endif