Mobile Web Test Suites Working Group Blog
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Updated canvas test — 12 May 2009
We've made another small update to the Web Compatibility Test for Mobile Browsers (WCTMB). The canvas test has been made a bit more difficult, testing alpha transparency too:
function canvas() {
var c = document.getElementById("canvas");
var ctx = c.getContext("2d");
ctx.fillStyle = "rgb(0,128,0)";
ctx.fillRect(0, 0, 20, 20);
ctx.globalAlpha = 0; // any future drawing operations will be invisible
ctx.drawImage(document.getElementById('red.png'), 0, 0); // draw invisible red square over the green square
}
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Contacts: Dominique Hazael-Massieux