/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef WEBGL_VERTEX_ARRAY_H_
#define WEBGL_VERTEX_ARRAY_H_

#include "nsTArray.h"
#include "mozilla/LinkedList.h"
#include "nsWrapperCache.h"

#include "CacheMap.h"
#include "WebGLObjectModel.h"
#include "WebGLStrongTypes.h"
#include "WebGLVertexAttribData.h"

namespace mozilla {

class WebGLVertexArrayFake;
namespace webgl {
struct LinkedProgramInfo;
}

class WebGLVertexArray : public nsWrapperCache,
                         public WebGLRefCountedObject<WebGLVertexArray>,
                         public LinkedListElement<WebGLVertexArray>,
                         public CacheMapInvalidator {
 public:
  static WebGLVertexArray* Create(WebGLContext* webgl);

  void BindVertexArray() {
    // Bind to dummy value to signal that this vertex array has ever been
    // bound.
    BindVertexArrayImpl();
  };

  // Implement parent classes:
  void Delete();
  bool IsVertexArray() const;

  WebGLContext* GetParentObject() const { return mContext; }

  virtual JSObject* WrapObject(JSContext* cx,
                               JS::Handle<JSObject*> givenProto) override;

  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLVertexArray)
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLVertexArray)

  GLuint GLName() const { return mGLName; }

  void AddBufferBindCounts(int8_t addVal) const;

 protected:
  explicit WebGLVertexArray(WebGLContext* webgl);
  virtual ~WebGLVertexArray();

  virtual void GenVertexArray() = 0;
  virtual void BindVertexArrayImpl() = 0;
  virtual void DeleteImpl() = 0;
  virtual bool IsVertexArrayImpl() const = 0;

  GLuint mGLName;
  nsTArray<WebGLVertexAttribData> mAttribs;
  WebGLRefPtr<WebGLBuffer> mElementArrayBuffer;

  friend class ScopedDrawHelper;
  friend class WebGLContext;
  friend class WebGLVertexArrayFake;
  friend class WebGL2Context;
  friend struct webgl::LinkedProgramInfo;
};

}  // namespace mozilla

#endif  // WEBGL_VERTEX_ARRAY_H_