dom/canvas/WebGLChild.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef WEBGLCHILD_H_
   7 #define WEBGLCHILD_H_
   8
   9 #include "mozilla/dom/PWebGLChild.h"
  10 #include "mozilla/WeakPtr.h"
  11
  12 #include <string>
  13
  14 namespace mozilla {
  15
  16 class ClientWebGLContext;
  17
  18 namespace dom {
  19
  20 struct FlushedCmdInfo final {
  21   size_t flushes = 0;
  22   size_t flushedCmdBytes = 0;
  23   size_t overhead = 0;
  24 };
  25
  26 class WebGLChild final : public PWebGLChild, public SupportsWeakPtr {
  27   const WeakPtr<ClientWebGLContext> mContext;
  28   const size_t mDefaultCmdsShmemSize;
  29   webgl::RaiiShmem mPendingCmdsShmem;
  30   size_t mPendingCmdsPos = 0;
  31   size_t mPendingCmdsAlignmentOverhead = 0;
  32   FlushedCmdInfo mFlushedCmdInfo;
  33
  34  public:
  35   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebGLChild, override);
  36
  37   explicit WebGLChild(ClientWebGLContext&);
  38
  39   Maybe<Range<uint8_t>> AllocPendingCmdBytes(size_t,
  40                                              size_t fyiAlignmentOverhead);
  41   void FlushPendingCmds();
  42   void ActorDestroy(ActorDestroyReason why) override;
  43
  44  private:
  45   friend PWebGLChild;
  46   virtual ~WebGLChild();
  47
  48  public:
  49   mozilla::ipc::IPCResult RecvJsWarning(const std::string&) const;
  50   mozilla::ipc::IPCResult RecvOnContextLoss(webgl::ContextLossReason) const;
  51 };
  52
  53 }  // namespace dom
  54 }  // namespace mozilla
  55
  56 #endif  // WEBGLCHILD_H_