WebGLTransformFeedback.h

Enable keyboard shortcuts

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* 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 "WebGLObjectModel.h"

#include "WebGLTypes.h"

namespace mozilla {

namespace webgl {

struct CachedDrawFetchLimits;

class WebGLTransformFeedback final : public WebGLContextBoundObject {

  friend class ScopedDrawWithTransformFeedback;

  friend class WebGLContext;

  friend class WebGL2Context;

  friend class WebGLProgram;

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(WebGLTransformFeedback, override)

  friend const webgl::CachedDrawFetchLimits* ValidateDraw(WebGLContext*, GLenum,

                                                          uint32_t);

 public:

  const GLuint mGLName;

  bool mHasBeenBound = false;

 private:

  // GLES 3.0.4 p267, Table 6.24 "Transform Feedback State"

  // It's not yet in the ES3 spec, but the generic TF buffer bind point has been

  // moved to context state, instead of TFO state.

  std::vector<IndexedBufferBinding> mIndexedBindings;

  bool mIsPaused;

  bool mIsActive;

  // Not in state tables:

  RefPtr<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() override;

 public:

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

  // GL Funcs

  void BeginTransformFeedback(GLenum primMode);

  void EndTransformFeedback();

  void PauseTransformFeedback();

  void ResumeTransformFeedback();

};

}  // namespace mozilla

#endif  // WEBGL_TRANSFORM_FEEDBACK_H_