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Implement EXT_frag_depth
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4d541e8e38
commit
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7 changed files with 97 additions and 4 deletions
62
components/script/dom/webgl_extensions/ext/extfragdepth.rs
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62
components/script/dom/webgl_extensions/ext/extfragdepth.rs
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/* 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 https://mozilla.org/MPL/2.0/. */
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use super::{WebGLExtension, WebGLExtensionSpec, WebGLExtensions};
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use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::webglrenderingcontext::WebGLRenderingContext;
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use canvas_traits::webgl::{WebGLSLVersion, WebGLVersion};
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use dom_struct::dom_struct;
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#[dom_struct]
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pub struct EXTFragDepth {
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reflector_: Reflector,
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}
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impl EXTFragDepth {
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fn new_inherited() -> EXTFragDepth {
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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 EXTFragDepth {
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type Extension = Self;
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fn new(ctx: &WebGLRenderingContext) -> DomRoot<Self> {
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reflect_dom_object(Box::new(Self::new_inherited()), &*ctx.global())
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}
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fn spec() -> WebGLExtensionSpec {
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WebGLExtensionSpec::Specific(WebGLVersion::WebGL1)
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}
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fn is_supported(ext: &WebGLExtensions) -> bool {
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let min_glsl_version = if ext.is_gles() {
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WebGLSLVersion { major: 3, minor: 0 }
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} else {
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WebGLSLVersion {
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major: 1,
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minor: 10,
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}
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};
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match (
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ext.is_gles(),
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ext.is_min_glsl_version_satisfied(min_glsl_version),
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) {
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// ANGLE's shader translator can't translate ESSL1 exts to ESSL3. (bug
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// 1524804)
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(true, true) => false,
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(true, false) => ext.supports_gl_extension("GL_EXT_frag_depth"),
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(false, is_min_glsl_version_satisfied) => is_min_glsl_version_satisfied,
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}
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}
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fn enable(_ext: &WebGLExtensions) {}
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fn name() -> &'static str {
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"EXT_frag_depth"
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}
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}
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