[RenderEngine] Move RenderEngine to libs/renderengine

To do side-by-side comparison between readback buffer from hardware composer
and client target of RenderEngine, we need RenderEngine to be accessible in
VTS, which means RenderEngine should be part of VNDK. This patch moves
RenderEngine out of SurfaceFlinger to libs/renderengine.

BUG: 112585051
Test: build, flash, boot and do some display validation
Change-Id: Ib6b302eaad04c7cc6c5bae39b1d25b38be188d01
diff --git a/libs/renderengine/gl/GLFramebuffer.h b/libs/renderengine/gl/GLFramebuffer.h
new file mode 100644
index 0000000..90c6f4a
--- /dev/null
+++ b/libs/renderengine/gl/GLFramebuffer.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <cstdint>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <renderengine/Framebuffer.h>
+
+struct ANativeWindowBuffer;
+
+namespace android {
+namespace renderengine {
+namespace gl {
+
+class GLES20RenderEngine;
+
+class GLFramebuffer : public renderengine::Framebuffer {
+public:
+    explicit GLFramebuffer(const GLES20RenderEngine& engine);
+    ~GLFramebuffer() override;
+
+    bool setNativeWindowBuffer(ANativeWindowBuffer* nativeBuffer) override;
+    EGLImageKHR getEGLImage() const { return mEGLImage; }
+    uint32_t getTextureName() const { return mTextureName; }
+    uint32_t getFramebufferName() const { return mFramebufferName; }
+    int32_t getBufferHeight() const { return mBufferHeight; }
+    int32_t getBufferWidth() const { return mBufferWidth; }
+
+private:
+    EGLDisplay mEGLDisplay;
+    EGLImageKHR mEGLImage;
+    uint32_t mTextureName, mFramebufferName;
+
+    int32_t mBufferHeight = 0;
+    int32_t mBufferWidth = 0;
+};
+
+} // namespace gl
+} // namespace renderengine
+} // namespace android