[Remoting Android] Create Interfaces for GlDisplay

remoting/android/java/src/org/chromium/chromoting/RenderStub.java

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chromoting;
+
+import android.graphics.Matrix;
+import android.graphics.PointF;
+
+/**
+ * Interface with a set of functions to control the behavior of the remote host renderer.
+ */
+public interface RenderStub {
+    /** Used to define the animation feedback shown when a user touches the screen. */
+    enum InputFeedbackType {
+        NONE,
+        SHORT_TOUCH_ANIMATION,
+        LONG_TOUCH_ANIMATION,
+        LONG_TRACKPAD_ANIMATION
+    }
+
+    /**
+     * Resets the stub with |view|. The stub should avoid holding strong reference to |view|.
+     */
+    void setDesktopView(DesktopView view);
+
+    /** Triggers a brief animation to indicate the existence and location of an input event. */
+    void showInputFeedback(InputFeedbackType feedbackToShow, PointF pos);
+
+    /**
+     * Informs the stub that its transformation matrix (for rendering the remote desktop bitmap)
+     * has been changed, which requires repainting.
+     */
+    void setTransformation(Matrix matrix);
+
+    /**
+     * Informs the stub that the cursor position has been moved, which requires repainting.
+     */
+    void moveCursor(PointF pos);
+
+    /**
+     * Informs the stub that the cursor visibility has been changed (for different input mode),
+     * which requires repainting.
+     */
+    void setCursorVisibility(boolean visible);
+
+    /** An {@link Event} triggered when the client size is changed. */
+    Event<SizeChangedEventParameter> onClientSizeChanged();
+
+    /**
+     * An {@link Event} triggered when the size of the host desktop is changed.
+     */
+    Event<SizeChangedEventParameter> onHostSizeChanged();
+
+    /**
+     * An {@link} triggered when a frame has been rendered.
+     */
+    Event<Void> onCanvasRendered();
+}