script/dom/webgl/extensions/ext/
oesstandardderivatives.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use dom_struct::dom_struct;
6use js::context::JSContext;
7use script_bindings::reflector::{Reflector, reflect_dom_object_with_cx};
8use servo_canvas_traits::webgl::WebGLVersion;
9
10use super::{WebGLExtension, WebGLExtensionSpec, WebGLExtensions};
11use crate::dom::bindings::codegen::Bindings::OESStandardDerivativesBinding::OESStandardDerivativesConstants;
12use crate::dom::bindings::reflector::DomGlobal;
13use crate::dom::bindings::root::DomRoot;
14use crate::dom::webgl::webglrenderingcontext::WebGLRenderingContext;
15
16#[dom_struct]
17pub(crate) struct OESStandardDerivatives {
18    reflector_: Reflector,
19}
20
21impl OESStandardDerivatives {
22    fn new_inherited() -> OESStandardDerivatives {
23        Self {
24            reflector_: Reflector::new(),
25        }
26    }
27}
28
29impl WebGLExtension for OESStandardDerivatives {
30    type Extension = OESStandardDerivatives;
31    fn new(cx: &mut JSContext, ctx: &WebGLRenderingContext) -> DomRoot<OESStandardDerivatives> {
32        reflect_dom_object_with_cx(Box::new(Self::new_inherited()), &*ctx.global(), cx)
33    }
34
35    fn spec() -> WebGLExtensionSpec {
36        WebGLExtensionSpec::Specific(WebGLVersion::WebGL1)
37    }
38
39    fn is_supported(ext: &WebGLExtensions) -> bool {
40        // The standard derivatives are always available in desktop OpenGL.
41        !ext.is_gles() || ext.supports_any_gl_extension(&["GL_OES_standard_derivatives"])
42    }
43
44    fn enable(ext: &WebGLExtensions) {
45        ext.enable_hint_target(
46            OESStandardDerivativesConstants::FRAGMENT_SHADER_DERIVATIVE_HINT_OES,
47        );
48        ext.enable_get_parameter_name(
49            OESStandardDerivativesConstants::FRAGMENT_SHADER_DERIVATIVE_HINT_OES,
50        );
51    }
52
53    fn name() -> &'static str {
54        "OES_standard_derivatives"
55    }
56}
script/dom/webgl/extensions/ext/oesstandardderivatives.rs

script/dom/webgl/extensions/ext/
oesstandardderivatives.rs
