1 files changed, 46 insertions, 0 deletions
diff --git a/components/script/dom/webgl_extensions/ext/extshadertexturelod.rs b/components/script/dom/webgl_extensions/ext/extshadertexturelod.rs
new file mode 100644
index 00000000000..ea68b518dac
--- /dev/null
+++ b/components/script/dom/webgl_extensions/ext/extshadertexturelod.rs
@@ -0,0 +1,46 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+
+use super::{WebGLExtension, WebGLExtensionSpec, WebGLExtensions};
+use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::webglrenderingcontext::WebGLRenderingContext;
+use canvas_traits::webgl::WebGLVersion;
+use dom_struct::dom_struct;
+
+#[dom_struct]
+pub struct EXTShaderTextureLod {
+    reflector_: Reflector,
+}
+
+impl EXTShaderTextureLod {
+    fn new_inherited() -> Self {
+        Self {
+            reflector_: Reflector::new(),
+        }
+    }
+}
+
+impl WebGLExtension for EXTShaderTextureLod {
+    type Extension = Self;
+
+    fn new(ctx: &WebGLRenderingContext) -> DomRoot<Self> {
+        reflect_dom_object(Box::new(Self::new_inherited()), &*ctx.global())
+    }
+
+    fn spec() -> WebGLExtensionSpec {
+        WebGLExtensionSpec::Specific(WebGLVersion::WebGL1)
+    }
+
+    fn is_supported(ext: &WebGLExtensions) -> bool {
+        // This extension is always available on desktop GL.
+        !ext.is_gles() || ext.supports_gl_extension("GL_EXT_shader_texture_lod")
+    }
+
+    fn enable(_ext: &WebGLExtensions) {}
+
+    fn name() -> &'static str {
+        "EXT_shader_texture_lod"
+    }
+}