Merge pull request #129 from De-Panther/workaround_chromium_depth_bug

Workaround for Chromium depth bug

Author: De-Panther

Build/Build/Build.data.unityweb

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Workaround for Chromium depth bug (Chromium issue 1167450).
+
 ## [0.8.0] - 2020-02-26
 ### Added
 - ToggleAR, ToggleVR, isSupportedAR and isSupportedVR to WebXRManager.

Build/Build/Build.wasm

@@ -833,7 +833,10 @@ setTimeout(function () {
         this.ctx.bindFramebuffer(this.ctx.FRAMEBUFFER, glLayer.framebuffer);
         if (session.isAR) {
           this.ctx.dontClearOnFrameStart = true;
-          this.ctx.clear(this.ctx.STENCIL_BUFFER_BIT | this.ctx.DEPTH_BUFFER_BIT);
+          // Workaround for Chromium depth bug https://bugs.chromium.org/p/chromium/issues/detail?id=1167450#c21
+          this.ctx.depthMask(false);
+          this.ctx.clear(this.ctx.DEPTH_BUFFER_BIT);
+          this.ctx.depthMask(true);
         } else {
           this.ctx.clear(this.ctx.COLOR_BUFFER_BIT | this.ctx.DEPTH_BUFFER_BIT);
         }