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[Plot] Fall back from WebGL on context loss

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When a WebGL context is loss, fall back to displaying
plots using regular canvas 2d API. WTD-475.
This commit is contained in:
Victor Woeltjen 2015-06-19 16:02:52 -07:00
parent dac44623ee
commit b6fdf4d6ab
1 changed files with 6 additions and 0 deletions
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6
platform/features/plot/src/MCTChart.js
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@ -155,6 +155,7 @@ define(
} }
} }
// Switch from WebGL to plain 2D if context is lost
function fallbackFromWebGL() { function fallbackFromWebGL() {
element.html(TEMPLATE); element.html(TEMPLATE);
canvas = element.find("canvas")[0]; canvas = element.find("canvas")[0];
@ -173,6 +174,11 @@ define(
return; return;
} }
// WebGL is a bit of a special case; it may work, then fail
// later for various reasons, so we need to listen for this
// and fall back to plain canvas drawing when it occurs.
canvas.addEventListener("webglcontextlost", fallbackFromWebGL);
// Check for resize, on a timer // Check for resize, on a timer
activeInterval = $interval(drawIfResized, 1000); activeInterval = $interval(drawIfResized, 1000);