dom/canvas/WebGLTransformFeedback.h
author Sylvestre Ledru <sledru@mozilla.com>
Thu, 17 Aug 2017 11:13:01 +0200
changeset 648192 c236dfe7dc98c387219d7cb45d0693560db708fd
parent 454938 aa8818f7704553cadb3e3285913dd73c36d8c61f
permissions -rw-r--r--
indent all (with js specific coding style) MozReview-Commit-ID: LU1md2wyB8

/* -*- 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_TRANSFORM_FEEDBACK_H_
#define WEBGL_TRANSFORM_FEEDBACK_H_

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

namespace mozilla {

class WebGLTransformFeedback final
  : public nsWrapperCache
  , public WebGLRefCountedObject<WebGLTransformFeedback>
  , public LinkedListElement<WebGLTransformFeedback>
{
  friend class ScopedDrawHelper;
  friend class ScopedDrawWithTransformFeedback;
  friend class WebGLContext;
  friend class WebGL2Context;
  friend class WebGLProgram;

public:
  const GLuint mGLName;

private:
  // GLES 3.0.4 p267, Table 6.24 "Transform Feedback State"
  WebGLRefPtr<WebGLBuffer> mGenericBufferBinding;
  std::vector<IndexedBufferBinding> mIndexedBindings;
  bool mIsPaused;
  bool mIsActive;
  // Not in state tables:
  WebGLRefPtr<WebGLProgram> mActive_Program;
  MOZ_INIT_OUTSIDE_CTOR GLenum mActive_PrimMode;
  MOZ_INIT_OUTSIDE_CTOR size_t mActive_VertPosition;
  MOZ_INIT_OUTSIDE_CTOR size_t mActive_VertCapacity;

public:
  WebGLTransformFeedback(WebGLContext* webgl, GLuint tf);

private:
  ~WebGLTransformFeedback();

public:
  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLTransformFeedback)
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLTransformFeedback)

  void Delete();
  WebGLContext* GetParentObject() const { return mContext; }
  virtual JSObject* WrapObject(JSContext*, JS::Handle<JSObject*>) override;

  bool IsActiveAndNotPaused() const { return mIsActive && !mIsPaused; }

  void AddBufferBindCounts(int8_t addVal) const;

  // GL Funcs
  void BeginTransformFeedback(GLenum primMode);
  void EndTransformFeedback();
  void PauseTransformFeedback();
  void ResumeTransformFeedback();
};

} // namespace mozilla

#endif // WEBGL_TRANSFORM_FEEDBACK_H_