Implement WebGL extensions.

components/script/dom/webgl_extensions/ext/webglvertexarrayobjectoes.rs

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+/* 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/. */
+
+use core::cell::Ref;
+use core::iter::FromIterator;
+use dom::bindings::cell::DOMRefCell;
+use dom::bindings::codegen::Bindings::WebGLVertexArrayObjectOESBinding;
+use dom::bindings::js::{JS, MutNullableJS};
+use dom::bindings::js::Root;
+use dom::bindings::reflector::reflect_dom_object;
+use dom::globalscope::GlobalScope;
+use dom::webglbuffer::WebGLBuffer;
+use dom::webglobject::WebGLObject;
+use dom_struct::dom_struct;
+use std::cell::Cell;
+use std::collections::HashMap;
+use webrender_traits::WebGLVertexArrayId;
+
+#[dom_struct]
+pub struct WebGLVertexArrayObjectOES {
+    webgl_object_: WebGLObject,
+    id: WebGLVertexArrayId,
+    ever_bound: Cell<bool>,
+    is_deleted: Cell<bool>,
+    bound_attrib_buffers: DOMRefCell<HashMap<u32, JS<WebGLBuffer>>>,
+    bound_buffer_element_array: MutNullableJS<WebGLBuffer>,
+}
+
+impl WebGLVertexArrayObjectOES {
+    fn new_inherited(id: WebGLVertexArrayId) -> WebGLVertexArrayObjectOES {
+        Self {
+            webgl_object_: WebGLObject::new_inherited(),
+            id: id,
+            ever_bound: Cell::new(false),
+            is_deleted: Cell::new(false),
+            bound_attrib_buffers: DOMRefCell::new(HashMap::new()),
+            bound_buffer_element_array: MutNullableJS::new(None),
+        }
+    }
+
+    pub fn new(global: &GlobalScope, id: WebGLVertexArrayId) -> Root<WebGLVertexArrayObjectOES> {
+        reflect_dom_object(box WebGLVertexArrayObjectOES::new_inherited(id),
+                           global,
+                           WebGLVertexArrayObjectOESBinding::Wrap)
+    }
+
+    pub fn id(&self) -> WebGLVertexArrayId {
+        self.id
+    }
+
+    pub fn is_deleted(&self) -> bool {
+        self.is_deleted.get()
+    }
+
+    pub fn set_deleted(&self) {
+        self.is_deleted.set(true)
+    }
+
+    pub fn ever_bound(&self) -> bool {
+        return self.ever_bound.get()
+    }
+
+    pub fn set_ever_bound(&self) {
+        self.ever_bound.set(true);
+    }
+
+    pub fn borrow_bound_attrib_buffers(&self) -> Ref<HashMap<u32, JS<WebGLBuffer>>> {
+        self.bound_attrib_buffers.borrow()
+    }
+
+    pub fn bound_attrib_buffers(&self) -> Vec<Root<WebGLBuffer>> {
+        self.bound_attrib_buffers.borrow().iter().map(|(_, b)| Root::from_ref(&**b)).collect()
+    }
+
+    pub fn set_bound_attrib_buffers<'a, T>(&self, iter: T) where T: Iterator<Item=(u32, &'a WebGLBuffer)> {
+        *self.bound_attrib_buffers.borrow_mut() = HashMap::from_iter(iter.map(|(k,v)| (k, JS::from_ref(v))));
+    }
+
+    pub fn bound_buffer_element_array(&self) -> Option<Root<WebGLBuffer>> {
+        self.bound_buffer_element_array.get()
+    }
+
+    pub fn set_bound_buffer_element_array(&self, buffer: Option<&WebGLBuffer>) {
+        self.bound_buffer_element_array.set(buffer);
+    }
+}