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Check only for WebGL 1.0, move test to HTML file

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Whether to use WebGL 1.0 or 2.0 can only be determined at runtime after
reading project settings, so check for the lower version.

The test is now in the HTML file, so if desired WebGL 2.0 can be
checked early by changing the behaviour there.
This commit is contained in:
Leon Krause
2018-03-15 04:00:32 +01:00
parent 955397dfd5
commit 61026e62bf
3 changed files with 32 additions and 23 deletions
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26
platform/javascript/engine.js
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@@ -138,18 +138,6 @@
}
var actualCanvas = this.rtenv.canvas;
var testContext = false;
var testCanvas;
try {
testCanvas = document.createElement('canvas');
testContext = testCanvas.getContext('webgl2') || testCanvas.getContext('experimental-webgl2');
} catch (e) {}
if (!testContext) {
throw new Error("WebGL 2 not available");
}
testCanvas = null;
testContext = null;
// canvas can grab focus on click
if (actualCanvas.tabIndex < 0) {
actualCanvas.tabIndex = 0;
@@ -273,6 +261,20 @@
Engine.RuntimeEnvironment = engine.RuntimeEnvironment;
Engine.isWebGLAvailable = function(majorVersion = 1) {
var testContext = false;
try {
var testCanvas = document.createElement('canvas');
if (majorVersion === 1) {
testContext = testCanvas.getContext('webgl') || testCanvas.getContet('experimental-webgl');
} else if (majorVersion === 2) {
testContext = testCanvas.getContext('webgl2') || testCanvas.getContet('experimental-webgl2');
}
} catch (e) {}
return !!testContext;
};
Engine.load = function(newBasePath) {
if (newBasePath !== undefined) basePath = getBasePath(newBasePath);