Implement WebGL extensions.

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

@@ -0,0 +1,47 @@
+/* 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 dom::bindings::codegen::Bindings::OESTextureHalfFloatBinding::OESTextureHalfFloatConstants;
+use dom::bindings::codegen::Bindings::OESTextureHalfFloatLinearBinding;
+use dom::bindings::js::Root;
+use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
+use dom::webglrenderingcontext::WebGLRenderingContext;
+use dom_struct::dom_struct;
+use super::{WebGLExtension, WebGLExtensions};
+
+#[dom_struct]
+pub struct OESTextureHalfFloatLinear {
+    reflector_: Reflector,
+}
+
+impl OESTextureHalfFloatLinear {
+    fn new_inherited() -> OESTextureHalfFloatLinear {
+        Self {
+            reflector_: Reflector::new(),
+        }
+    }
+}
+
+impl WebGLExtension for OESTextureHalfFloatLinear {
+    type Extension = OESTextureHalfFloatLinear;
+    fn new(ctx: &WebGLRenderingContext) -> Root<OESTextureHalfFloatLinear> {
+        reflect_dom_object(box OESTextureHalfFloatLinear::new_inherited(),
+                           &*ctx.global(),
+                           OESTextureHalfFloatLinearBinding::Wrap)
+    }
+
+    fn is_supported(ext: &WebGLExtensions) -> bool {
+        ext.supports_any_gl_extension(&["GL_OES_texture_float_linear",
+                                        "GL_ARB_half_float_pixel",
+                                        "GL_NV_half_float"])
+    }
+
+    fn enable(ext: &WebGLExtensions) {
+        ext.enable_filterable_tex_type(OESTextureHalfFloatConstants::HALF_FLOAT_OES);
+    }
+
+    fn name() -> &'static str {
+        "OES_texture_half_float_linear"
+    }
+}