WebGLBuffer.h - mozsearch

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/* -*- 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_BUFFER_H_

#define WEBGL_BUFFER_H_

#include <map>

#include "CacheInvalidator.h"

#include "GLDefs.h"

#include "WebGLObjectModel.h"

#include "WebGLTypes.h"

namespace mozilla {

class WebGLBuffer final : public WebGLContextBoundObject {

  friend class WebGLContext;

  friend class WebGL2Context;

  friend class WebGLMemoryTracker;

  friend class WebGLTexture;

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(WebGLBuffer, override)

 public:

  enum class Kind { Undefined, ElementArray, OtherData };

  WebGLBuffer(WebGLContext* webgl, GLuint buf);

  void SetContentAfterBind(GLenum target);

  Kind Content() const { return mContent; }

  size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const;

  GLenum Usage() const { return mUsage; }

  size_t ByteLength() const { return mByteLength; }

  Maybe<uint32_t> GetIndexedFetchMaxVert(GLenum type, uint64_t byteOffset,

                                         uint32_t indexCount) const;

  bool ValidateRange(size_t byteOffset, size_t byteLen) const;

  bool ValidateCanBindToTarget(GLenum target);

  void BufferData(GLenum target, uint64_t size, const void* data, GLenum usage,

                  bool allowUninitialized = false);

  void BufferSubData(GLenum target, uint64_t dstByteOffset, uint64_t dataLen,

                     const void* data, bool unsynchronized = false) const;

  ////

  const GLenum mGLName;

 protected:

  ~WebGLBuffer() override;

  void InvalidateCacheRange(uint64_t byteOffset, uint64_t byteLength) const;

  Kind mContent = Kind::Undefined;

  GLenum mUsage = LOCAL_GL_STATIC_DRAW;

  size_t mByteLength = 0;

  mutable uint64_t mLastUpdateFenceId = 0;

  struct IndexRange final {

    GLenum type;

    uint64_t byteOffset;

    uint32_t indexCount;

    bool operator<(const IndexRange& x) const {

      if (type != x.type) return type < x.type;

      if (byteOffset != x.byteOffset) return byteOffset < x.byteOffset;

      return indexCount < x.indexCount;

};

  UniqueBuffer mIndexCache;

  mutable std::map<IndexRange, Maybe<uint32_t>> mIndexRanges;

 public:

  CacheInvalidator mFetchInvalidator;

  void ResetLastUpdateFenceId() const;

};

}  // namespace mozilla

#endif  // WEBGL_BUFFER_H_