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50 lines
1.8 KiB
Rust
50 lines
1.8 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::OESStandardDerivativesBinding;
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use dom::bindings::codegen::Bindings::OESStandardDerivativesBinding::OESStandardDerivativesConstants;
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use dom::bindings::js::Root;
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use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
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use dom::webglrenderingcontext::WebGLRenderingContext;
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use dom_struct::dom_struct;
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use super::{WebGLExtension, WebGLExtensions};
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#[dom_struct]
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pub struct OESStandardDerivatives {
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reflector_: Reflector,
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}
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impl OESStandardDerivatives {
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fn new_inherited() -> OESStandardDerivatives {
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Self {
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reflector_: Reflector::new(),
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}
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}
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}
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impl WebGLExtension for OESStandardDerivatives {
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type Extension = OESStandardDerivatives;
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fn new(ctx: &WebGLRenderingContext) -> Root<OESStandardDerivatives> {
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reflect_dom_object(box OESStandardDerivatives::new_inherited(),
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&*ctx.global(),
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OESStandardDerivativesBinding::Wrap)
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}
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fn is_supported(ext: &WebGLExtensions) -> bool {
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if cfg!(any(target_os = "android", target_os = "ios")) {
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return ext.supports_any_gl_extension(&["GL_OES_standard_derivatives"]);
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}
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// The standard derivatives are always available in desktop OpenGL.
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true
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}
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fn enable(ext: &WebGLExtensions) {
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ext.enable_hint_target(OESStandardDerivativesConstants::FRAGMENT_SHADER_DERIVATIVE_HINT_OES);
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ext.enable_get_parameter_name(OESStandardDerivativesConstants::FRAGMENT_SHADER_DERIVATIVE_HINT_OES);
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}
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fn name() -> &'static str {
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"OES_standard_derivatives"
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}
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}
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