1 files changed, 62 insertions, 0 deletions
diff --git a/dom/canvas/WebGL2ContextSync.cpp b/dom/canvas/WebGL2ContextSync.cpp
new file mode 100644
index 0000000000..b0092ca682
--- /dev/null
+++ b/dom/canvas/WebGL2ContextSync.cpp
@@ -0,0 +1,62 @@
+/* -*- 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/. */
+
+#include "WebGL2Context.h"
+
+#include "GLContext.h"
+#include "WebGLSync.h"
+#include "mozilla/StaticPrefs_webgl.h"
+
+namespace mozilla {
+
+// -------------------------------------------------------------------------
+// Sync objects
+
+RefPtr<WebGLSync> WebGL2Context::FenceSync(GLenum condition, GLbitfield flags) {
+  const FuncScope funcScope(*this, "fenceSync");
+  if (IsContextLost()) return nullptr;
+
+  if (condition != LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE) {
+    ErrorInvalidEnum("condition must be SYNC_GPU_COMMANDS_COMPLETE");
+    return nullptr;
+  }
+
+  if (flags != 0) {
+    ErrorInvalidValue("flags must be 0");
+    return nullptr;
+  }
+
+  RefPtr<WebGLSync> globj = new WebGLSync(this, condition, flags);
+  return globj;
+}
+
+GLenum WebGL2Context::ClientWaitSync(const WebGLSync& sync, GLbitfield flags,
+                                     GLuint64 timeout) {
+  const FuncScope funcScope(*this, "clientWaitSync");
+  if (IsContextLost()) return LOCAL_GL_WAIT_FAILED;
+
+  if (!ValidateObject("sync", sync)) return LOCAL_GL_WAIT_FAILED;
+
+  if (flags != 0 && flags != LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT) {
+    ErrorInvalidValue("`flags` must be SYNC_FLUSH_COMMANDS_BIT or 0.");
+    return LOCAL_GL_WAIT_FAILED;
+  }
+
+  if (timeout > kMaxClientWaitSyncTimeoutNS) {
+    ErrorInvalidOperation("`timeout` must not exceed %s nanoseconds.",
+                          "MAX_CLIENT_WAIT_TIMEOUT_WEBGL");
+    return LOCAL_GL_WAIT_FAILED;
+  }
+
+  const auto ret = gl->fClientWaitSync(sync.mGLName, flags, timeout);
+
+  if (ret == LOCAL_GL_CONDITION_SATISFIED || ret == LOCAL_GL_ALREADY_SIGNALED) {
+    sync.MarkSignaled();
+  }
+
+  return ret;
+}
+
+}  // namespace mozilla