List of usage examples for com.google.gwt.webgl.client WebGLRenderingContext NO_ERROR
int NO_ERROR
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From source file:playn.html.HtmlGraphicsGL.java
License:Apache License
HtmlGraphicsGL(HtmlPlatform platform, HtmlPlatform.Configuration config) throws RuntimeException { canvas = Document.get().createCanvasElement(); rootElement.appendChild(canvas);//ww w . ja va 2s . c o m try { WebGLContextAttributes attrs = WebGLContextAttributes.create(); attrs.setAlpha(config.transparentCanvas); attrs.setAntialias(config.antiAliasing); // if this returns null, the browser doesn't support WebGL on this machine WebGLRenderingContext gl = WebGLRenderingContext.getContext(canvas, attrs); // Some systems seem to have a problem where they return a valid context, but it's in an // error state initially. We give up and fall back to Canvas in this case, because nothing // seems to work properly. if (gl == null || gl.getError() != WebGLRenderingContext.NO_ERROR) { throw new RuntimeException( "GL context not created [err=" + (gl == null ? "null" : gl.getError()) + "]"); } ctx = new HtmlGLContext(platform, gl, canvas); rootLayer = new GroupLayerGL(ctx); } catch (RuntimeException re) { // Give up. HtmlPlatform will catch the exception and fall back to dom/canvas. rootElement.removeChild(canvas); throw re; } }