1 files changed, 64 insertions, 0 deletions
diff --git a/dom/canvas/WebGLChild.h b/dom/canvas/WebGLChild.h
new file mode 100644
index 0000000000..85f3028676
--- /dev/null
+++ b/dom/canvas/WebGLChild.h
@@ -0,0 +1,64 @@
+/* -*- 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 WEBGLCHILD_H_
+#define WEBGLCHILD_H_
+
+#include <string>
+
+#include "mozilla/dom/PWebGLChild.h"
+#include "mozilla/dom/IpdlQueue.h"
+
+// This is a bit weird. Nothing directly in WebGLChild.h necessitates including
+// WebGLParent.h, but if we don't do this, we get compiler errors in the
+// generated code inside PWebGLChild.cpp. The error is due to a complex
+// dependency chain involving IpdlQueue, which I won't go into here. Including
+// WebGLParent.h inside WebGLChild.h is the simplest way we could think of to
+// avoid this issue. Including it in any of the code more directly involved in
+// the breaking dependency chain unfortunately introduces a cyclical dependency
+// between WebGLParent.h and PWebGLParent.h.
+#include "mozilla/dom/WebGLParent.h"
+
+namespace mozilla {
+
+class ClientWebGLContext;
+
+namespace dom {
+
+struct FlushedCmdInfo final {
+  size_t flushes = 0;
+  size_t flushedCmdBytes = 0;
+};
+
+class WebGLChild final : public PWebGLChild, public SupportsWeakPtr {
+  const WeakPtr<ClientWebGLContext> mContext;
+  const size_t mDefaultCmdsShmemSize;
+  webgl::RaiiShmem mPendingCmdsShmem;
+  size_t mPendingCmdsPos = 0;
+  FlushedCmdInfo mFlushedCmdInfo;
+
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebGLChild, override);
+  using OtherSideActor = WebGLParent;
+
+  explicit WebGLChild(ClientWebGLContext&);
+
+  Maybe<Range<uint8_t>> AllocPendingCmdBytes(size_t);
+  void FlushPendingCmds();
+  void ActorDestroy(ActorDestroyReason why) override;
+
+ private:
+  friend PWebGLChild;
+  virtual ~WebGLChild();
+
+ public:
+  mozilla::ipc::IPCResult RecvJsWarning(const std::string&) const;
+  mozilla::ipc::IPCResult RecvOnContextLoss(webgl::ContextLossReason) const;
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // WEBGLCHILD_H_