1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3  * License, v. 2.0. If a copy of the MPL was not distributed with this
4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 
6 #include "WebGLExtensions.h"
7 
8 #include "GLContext.h"
9 #include "mozilla/dom/WebGLRenderingContextBinding.h"
10 #include "WebGLContext.h"
11 
12 namespace mozilla {
13 
WebGLExtensionFragDepth(WebGLContext * webgl)14 WebGLExtensionFragDepth::WebGLExtensionFragDepth(WebGLContext* webgl)
15     : WebGLExtensionBase(webgl) {
16   MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
17 }
18 
IsSupported(const WebGLContext * webgl)19 bool WebGLExtensionFragDepth::IsSupported(const WebGLContext* webgl) {
20   if (webgl->IsWebGL2()) return false;
21 
22   gl::GLContext* gl = webgl->GL();
23   if (gl->IsGLES() && gl->Version() >= 300) {
24     // ANGLE's shader translator can't translate ESSL1 exts to ESSL3. (bug
25     // 1524804)
26     return false;
27   }
28   return gl->IsSupported(gl::GLFeature::frag_depth);
29 }
30 
31 }  // namespace mozilla
32