1 files changed, 70 insertions, 0 deletions
diff --git a/dom/canvas/WebGLVertexArray.cpp b/dom/canvas/WebGLVertexArray.cpp
new file mode 100644
index 0000000000..360d2dc057
--- /dev/null
+++ b/dom/canvas/WebGLVertexArray.cpp
@@ -0,0 +1,70 @@
+/* -*- 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 "WebGLVertexArray.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGLRenderingContextBinding.h"
+#include "WebGLBuffer.h"
+#include "WebGLContext.h"
+#include "WebGLVertexArrayGL.h"
+#include "WebGLVertexArrayFake.h"
+
+namespace mozilla {
+
+WebGLVertexArray* WebGLVertexArray::Create(WebGLContext* webgl) {
+  if (webgl->gl->IsSupported(gl::GLFeature::vertex_array_object)) {
+    return new WebGLVertexArrayGL(webgl);
+  }
+  return new WebGLVertexArrayFake(webgl);
+}
+
+WebGLVertexArray::WebGLVertexArray(WebGLContext* const webgl)
+    : WebGLContextBoundObject(webgl) {
+  const webgl::VertAttribPointerDesc defaultDesc;
+  const webgl::VertAttribPointerCalculated defaultCalc;
+  for (const auto i : IntegerRange(mContext->MaxVertexAttribs())) {
+    AttribPointer(i, nullptr, defaultDesc, defaultCalc);
+  }
+}
+
+WebGLVertexArray::~WebGLVertexArray() = default;
+
+Maybe<double> WebGLVertexArray::GetVertexAttrib(const uint32_t index,
+                                                const GLenum pname) const {
+  const auto& binding = mBindings[index];
+  const auto& desc = mDescs[index];
+
+  switch (pname) {
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_STRIDE:
+      return Some(desc.byteStrideOrZero);
+
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_SIZE:
+      return Some(desc.channels);
+
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_TYPE:
+      return Some(desc.type);
+
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_INTEGER:
+      return Some(desc.intFunc);
+
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_DIVISOR:
+      return Some(binding.layout.divisor);
+
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_ENABLED:
+      return Some(binding.layout.isArray);
+
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
+      return Some(desc.normalized);
+
+    case LOCAL_GL_VERTEX_ATTRIB_ARRAY_POINTER:
+      return Some(binding.layout.byteOffset);
+
+    default:
+      return {};
+  }
+}
+
+}  // namespace mozilla