1 files changed, 65 insertions, 0 deletions
diff --git a/components/script/dom/webgl_extensions/ext/oestexturehalffloat.rs b/components/script/dom/webgl_extensions/ext/oestexturehalffloat.rs
new file mode 100644
index 00000000000..4f2ef41c651
--- /dev/null
+++ b/components/script/dom/webgl_extensions/ext/oestexturehalffloat.rs
@@ -0,0 +1,65 @@
+/* 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::codegen::Bindings::OESTextureHalfFloatBinding::OESTextureHalfFloatConstants;
+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::{TexFormat, WebGLVersion};
+use dom_struct::dom_struct;
+
+#[dom_struct]
+pub struct OESTextureHalfFloat {
+    reflector_: Reflector,
+}
+
+impl OESTextureHalfFloat {
+    fn new_inherited() -> OESTextureHalfFloat {
+        Self {
+            reflector_: Reflector::new(),
+        }
+    }
+}
+
+impl WebGLExtension for OESTextureHalfFloat {
+    type Extension = OESTextureHalfFloat;
+    fn new(ctx: &WebGLRenderingContext) -> DomRoot<OESTextureHalfFloat> {
+        reflect_dom_object(
+            Box::new(OESTextureHalfFloat::new_inherited()),
+            &*ctx.global(),
+        )
+    }
+
+    fn spec() -> WebGLExtensionSpec {
+        WebGLExtensionSpec::Specific(WebGLVersion::WebGL1)
+    }
+
+    fn is_supported(ext: &WebGLExtensions) -> bool {
+        ext.supports_any_gl_extension(&[
+            "GL_OES_texture_half_float",
+            "GL_ARB_half_float_pixel",
+            "GL_NV_half_float",
+            "GL_EXT_color_buffer_half_float",
+        ])
+    }
+
+    fn enable(ext: &WebGLExtensions) {
+        let hf = OESTextureHalfFloatConstants::HALF_FLOAT_OES;
+        ext.enable_tex_type(hf);
+        ext.add_effective_tex_internal_format(TexFormat::RGBA, hf, TexFormat::RGBA16f);
+        ext.add_effective_tex_internal_format(TexFormat::RGB, hf, TexFormat::RGB16f);
+        ext.add_effective_tex_internal_format(TexFormat::Luminance, hf, TexFormat::Luminance16f);
+        ext.add_effective_tex_internal_format(TexFormat::Alpha, hf, TexFormat::Alpha16f);
+        ext.add_effective_tex_internal_format(
+            TexFormat::LuminanceAlpha,
+            hf,
+            TexFormat::LuminanceAlpha16f,
+        );
+    }
+
+    fn name() -> &'static str {
+        "OES_texture_half_float"
+    }
+}