This branch of Ejecta uses the JavaScriptCore library provided by the system. This mainly means two things: The resulting binary will be much smaller and Typed Arrays are extremely slow.
On 32bit systems reading/writing large Typed Arrays will be pretty much unusably slow. On 64bit systems it's highly optimized to take about 8ms for reading for 1MB of data and about 20ms for writing. This may be ok for simple WebGL stuff or if you don't use get/setImageData() on the Canvas2D context much.
This branch of Ejecta may be AppStore compatible for tvOS. I'm still waiting on the review, but at least the binary upload didn't fail like with the main branch.
Ejecta is a fast, open source JavaScript, Canvas & Audio implementation for iOS. Think of it as a Browser that can only display a Canvas element.
More info & Documentation: http://impactjs.com/ejecta
Ejecta is published under the MIT Open Source License.
Allowed interface orientations should now be set using the "Device Orientation" checkboxes in the Project's General settings. Ejecta now rotates to all allowed orientations automatically. If the window size changes due to a rotation (i.e. when rotating from landscape to portrait or vice versa), the window's resize event is fired.
window.addEventListener('resize', function() {
// Resize your screen canvas here if needed.
console.log('new window size:', window.innerWidth, window.innerHeight);
});The canvas.MSAAEnabled and canvas.MSAASamples properties have been removed. Instead, you can now specify antialias settings in a separate options object when calling getContext(), similar to how it works in a browser. Antialias now works on 2D and WebGL contexts.
Note that for 2D contexts antialias will have no effect when drawing images, other than slowing down performance. It only makes sense to enable antialias if you draw shapes and paths.
var gl = canvas.getContext('webgl', {antialias: true, antialiasSamples: 4});
// Or for 2d contexts
var ctx = canvas.getContext('2d', {antialias: true, antialiasSamples: 4});The Canvas' backing store is now exactly the same size as the canvas.width and canvas.height. Ejecta does not automatically double the internal resolution on retina devices anymore. The ctx.backingStorePixelRatio and canvas.retinaResolutionEnabled properties as well as the HD variants for the ctx.getImageData, ctx.putImageData and ctx.createImageData functions have been removed.
You can of course still render in retina resolution, by setting the width and height to the retina resolution while forcing the style to scale the canvas to the logical display resolution. This is in line with current browsers.
canvas.width = window.innerWidth * window.devicePixelRatio;
canvas.height = window.innerHeight * window.devicePixelRatio;
canvas.style.width = window.innerWidth + 'px';
canvas.style.height = window.innerHeight + 'px';
// For 2D contexts you may want to zoom in afterwards
ctx.scale( window.devicePixelRatio, window.devicePixelRatio );Recently WebGL support has been merged into the main branch. A huge thanks goes to @vikerman - he did most of the grunt work of the WebGL implementation. To have the WebGL alongside Canvas2D, I modified the old 2D implementation to use OpenGL ES2 instead of ES1, just like WebGL itself.
Ejecta always creates the screen Canvas element for you. You have to hand this Canvas element over to Three.js instead of letting it create its own.
renderer = new THREE.WebGLRenderer( {canvas: document.getElementById('canvas')} );- Create a folder called
Appwithin this XCode project - Copy your canvas application into the
Appfolder - Ensure you have at least 1 file named
index.js - Build the XCode project
For an example application, copy ./index.js into the App folder. An example App folder with the Three.js Walt CubeMap demo can be found here: