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/* 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::OESStandardDerivativesBinding;
use dom::bindings::codegen::Bindings::OESStandardDerivativesBinding::OESStandardDerivativesConstants;
use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
use dom::bindings::root::Root;
use dom::webglrenderingcontext::WebGLRenderingContext;
use dom_struct::dom_struct;
use super::{WebGLExtension, WebGLExtensions};
#[dom_struct]
pub struct OESStandardDerivatives {
reflector_: Reflector,
}
impl OESStandardDerivatives {
fn new_inherited() -> OESStandardDerivatives {
Self {
reflector_: Reflector::new(),
}
}
}
impl WebGLExtension for OESStandardDerivatives {
type Extension = OESStandardDerivatives;
fn new(ctx: &WebGLRenderingContext) -> Root<OESStandardDerivatives> {
reflect_dom_object(box OESStandardDerivatives::new_inherited(),
&*ctx.global(),
OESStandardDerivativesBinding::Wrap)
}
fn is_supported(ext: &WebGLExtensions) -> bool {
if cfg!(any(target_os = "android", target_os = "ios")) {
return ext.supports_any_gl_extension(&["GL_OES_standard_derivatives"]);
}
// The standard derivatives are always available in desktop OpenGL.
true
}
fn enable(ext: &WebGLExtensions) {
ext.enable_hint_target(OESStandardDerivativesConstants::FRAGMENT_SHADER_DERIVATIVE_HINT_OES);
ext.enable_get_parameter_name(OESStandardDerivativesConstants::FRAGMENT_SHADER_DERIVATIVE_HINT_OES);
}
fn name() -> &'static str {
"OES_standard_derivatives"
}
}
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