1 files changed, 88 insertions, 0 deletions
diff --git a/dom/canvas/WebGLBuffer.h b/dom/canvas/WebGLBuffer.h
new file mode 100644
index 0000000000..b641b9647e
--- /dev/null
+++ b/dom/canvas/WebGLBuffer.h
@@ -0,0 +1,88 @@
+/* -*- 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_