From 0baa011dd126f07c022d8c69b547f76b38e69746 Mon Sep 17 00:00:00 2001
From: yma16 <17685043634@163.com>
Date: Mon, 12 Oct 2020 23:00:42 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=B0=E6=96=87=E4=BB=B6?=
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Content-Type: text/plain; charset=UTF-8
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---
 loadmodel_views/js/WebGL.js | 94 +++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 loadmodel_views/js/WebGL.js

diff --git a/loadmodel_views/js/WebGL.js b/loadmodel_views/js/WebGL.js
new file mode 100644
index 0000000..139472f
--- /dev/null
+++ b/loadmodel_views/js/WebGL.js
@@ -0,0 +1,94 @@
+/**
+ * @author alteredq / http://alteredqualia.com/
+ * @author mr.doob / http://mrdoob.com/
+ */
+
+var WEBGL = {
+
+    isWebGLAvailable: function () {
+
+        try {
+
+            var canvas = document.createElement( 'canvas' );
+            return !! ( window.WebGLRenderingContext && ( canvas.getContext( 'webgl' ) || canvas.getContext( 'experimental-webgl' ) ) );
+
+        } catch ( e ) {
+
+            return false;
+
+        }
+
+    },
+
+    isWebGL2Available: function () {
+
+        try {
+
+            var canvas = document.createElement( 'canvas' );
+            return !! ( window.WebGL2RenderingContext && canvas.getContext( 'webgl2' ) );
+
+        } catch ( e ) {
+
+            return false;
+
+        }
+
+    },
+
+    getWebGLErrorMessage: function () {
+
+        return this.getErrorMessage( 1 );
+
+    },
+
+    getWebGL2ErrorMessage: function () {
+
+        return this.getErrorMessage( 2 );
+
+    },
+
+    getErrorMessage: function ( version ) {
+
+        var names = {
+            1: 'WebGL',
+            2: 'WebGL 2'
+        };
+
+        var contexts = {
+            1: window.WebGLRenderingContext,
+            2: window.WebGL2RenderingContext
+        };
+
+        var message = 'Your $0 does not seem to support <a href="http://khronos.org/webgl/wiki/Getting_a_WebGL_Implementation" style="color:#000">$1</a>';
+
+        var element = document.createElement( 'div' );
+        element.id = 'webglmessage';
+        element.style.fontFamily = 'monospace';
+        element.style.fontSize = '13px';
+        element.style.fontWeight = 'normal';
+        element.style.textAlign = 'center';
+        element.style.background = '#fff';
+        element.style.color = '#000';
+        element.style.padding = '1.5em';
+        element.style.width = '400px';
+        element.style.margin = '5em auto 0';
+
+        if ( contexts[ version ] ) {
+
+            message = message.replace( '$0', 'graphics card' );
+
+        } else {
+
+            message = message.replace( '$0', 'browser' );
+
+        }
+
+        message = message.replace( '$1', names[ version ] );
+
+        element.innerHTML = message;
+
+        return element;
+
+    }
+
+};
-- 
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