1 files changed, 78 insertions, 0 deletions
diff --git a/dom/canvas/WebGLVertexAttribData.h b/dom/canvas/WebGLVertexAttribData.h
new file mode 100644
index 000000000..9d79b4f94
--- /dev/null
+++ b/dom/canvas/WebGLVertexAttribData.h
@@ -0,0 +1,78 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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_VERTEX_ATTRIB_DATA_H_
+#define WEBGL_VERTEX_ATTRIB_DATA_H_
+
+#include "GLDefs.h"
+#include "WebGLObjectModel.h"
+
+namespace mozilla {
+
+class WebGLBuffer;
+
+class WebGLVertexAttribData final
+{
+public:
+    uint32_t mDivisor;
+    bool mEnabled;
+
+private:
+    bool mIntegerFunc;
+public:
+    WebGLRefPtr<WebGLBuffer> mBuf;
+private:
+    GLenum mType;
+    GLenum mBaseType;
+    uint8_t mSize; // num of mType vals per vert
+    uint8_t mBytesPerVertex;
+    bool mNormalized;
+    uint32_t mStride; // bytes
+    uint32_t mExplicitStride;
+    uint64_t mByteOffset;
+
+public:
+
+#define GETTER(X) const decltype(m##X)& X() const { return m##X; }
+
+    GETTER(IntegerFunc)
+    GETTER(Type)
+    GETTER(BaseType)
+    GETTER(Size)
+    GETTER(BytesPerVertex)
+    GETTER(Normalized)
+    GETTER(Stride)
+    GETTER(ExplicitStride)
+    GETTER(ByteOffset)
+
+#undef GETTER
+
+    // note that these initial values are what GL initializes vertex attribs to
+    WebGLVertexAttribData()
+        : mDivisor(0)
+        , mEnabled(false)
+    {
+        VertexAttribPointer(false, nullptr, 4, LOCAL_GL_FLOAT, false, 0, 0);
+    }
+
+    void VertexAttribPointer(bool integerFunc, WebGLBuffer* buf, uint8_t size,
+                             GLenum type, bool normalized, uint32_t stride,
+                             uint64_t byteOffset);
+
+    void DoVertexAttribPointer(gl::GLContext* gl, GLuint index) const;
+};
+
+} // namespace mozilla
+
+inline void
+ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& callback,
+                            mozilla::WebGLVertexAttribData& field,
+                            const char* name,
+                            uint32_t flags = 0)
+{
+    CycleCollectionNoteChild(callback, field.mBuf.get(), name, flags);
+}
+
+#endif // WEBGL_VERTEX_ATTRIB_DATA_H_