[Remoting Android] Cursor & Cursor Feedback for OpenGL Renderer

remoting/client/gl_cursor.h

+// 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.
+
+#ifndef REMOTING_CLIENT_OPENGL_GL_CURSOR_H_
+#define REMOTING_CLIENT_OPENGL_GL_CURSOR_H_
+
+#include <array>
+#include <memory>
+
+#include "base/macros.h"
+
+namespace remoting {
+
+namespace protocol {
+class CursorShapeInfo;
+}  // namespace protocol
+
+class GlCanvas;
+class GlRenderLayer;
+
+// This class draws the cursor on the canvas.
+class GlCursor {
+ public:
+  GlCursor();
+  ~GlCursor();
+
+  void SetCursorShape(const protocol::CursorShapeInfo& cursor_shape);
+
+  void SetCanvasSize(int width, int height);
+
+  // Sets the cursor hotspot positions. Does nothing if the cursor shape or the
+  // canvas size has not been set.
+  void SetCursorPosition(int x, int y);
+
+  // Draw() will do nothing if cursor is not visible.
+  void SetCursorVisible(bool visible);
+
+  // Sets the canvas on which the cursor will be drawn. Resumes the current
+  // state of the cursor to the context of the new canvas.
+  // If |canvas| is nullptr, nothing will happen when calling Draw().
+  void SetCanvas(GlCanvas* canvas);
+
+  void Draw();
+
+ private:
+  void SetCurrentCursorShape(bool size_changed);
+
+  bool visible_ = true;
+
+  std::unique_ptr<GlRenderLayer> layer_;
+
+  std::unique_ptr<uint8_t[]> current_cursor_data_;
+  int current_cursor_data_size_ = 0;
+  int current_cursor_width_ = 0;
+  int current_cursor_height_ = 0;
+  int current_cursor_hotspot_x_ = 0;
+  int current_cursor_hotspot_y_ = 0;
+
+  int cursor_x_ = 0;
+  int cursor_y_ = 0;
+  int canvas_width_ = 0;
+  int canvas_height_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(GlCursor);
+};
+
+}  // namespace remoting
+#endif  // REMOTING_CLIENT_OPENGL_GL_CURSOR_H_