1 files changed, 63 insertions, 0 deletions
diff --git a/components/script/dom/webgl_extensions/ext/oestexturefloat.rs b/components/script/dom/webgl_extensions/ext/oestexturefloat.rs
new file mode 100644
index 00000000000..e286095b7c7
--- /dev/null
+++ b/components/script/dom/webgl_extensions/ext/oestexturefloat.rs
@@ -0,0 +1,63 @@
+/* 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::{constants as webgl, 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::{TexFormat, WebGLVersion};
+use dom_struct::dom_struct;
+
+#[dom_struct]
+pub struct OESTextureFloat {
+    reflector_: Reflector,
+}
+
+impl OESTextureFloat {
+    fn new_inherited() -> OESTextureFloat {
+        Self {
+            reflector_: Reflector::new(),
+        }
+    }
+}
+
+impl WebGLExtension for OESTextureFloat {
+    type Extension = OESTextureFloat;
+    fn new(ctx: &WebGLRenderingContext) -> DomRoot<OESTextureFloat> {
+        reflect_dom_object(Box::new(OESTextureFloat::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_float",
+            "GL_ARB_texture_float",
+            "GL_EXT_color_buffer_float",
+        ])
+    }
+
+    fn enable(ext: &WebGLExtensions) {
+        ext.enable_tex_type(webgl::FLOAT);
+        ext.add_effective_tex_internal_format(TexFormat::RGBA, webgl::FLOAT, TexFormat::RGBA32f);
+        ext.add_effective_tex_internal_format(TexFormat::RGB, webgl::FLOAT, TexFormat::RGB32f);
+        ext.add_effective_tex_internal_format(
+            TexFormat::Luminance,
+            webgl::FLOAT,
+            TexFormat::Luminance32f,
+        );
+        ext.add_effective_tex_internal_format(TexFormat::Alpha, webgl::FLOAT, TexFormat::Alpha32f);
+        ext.add_effective_tex_internal_format(
+            TexFormat::LuminanceAlpha,
+            webgl::FLOAT,
+            TexFormat::LuminanceAlpha32f,
+        );
+    }
+
+    fn name() -> &'static str {
+        "OES_texture_float"
+    }
+}