зеркало из https://github.com/mozilla/gecko-dev.git
31 строка
933 B
HTML
31 строка
933 B
HTML
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<!DOCTYPE html>
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<canvas id="c" width="1" height="1"></canvas>
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<img id="img" src="image_green-1x1.png">
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<script>
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window.onmessage = function(ev) {
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if (ev.data != "start") {
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parent.postMessage({ msg: "unknown_message", data: ev.data }, "*");
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return;
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}
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// Set document.domain to itself, so we trigger the
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// "set effective script origin" cases.
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document.domain = document.domain
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var ctx = document.getElementById("c").getContext("2d");
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ctx.drawImage(document.getElementById("img"), 0, 0);
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try {
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var data = ctx.getImageData(0, 0, 1, 1).data;
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parent.postMessage(
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{
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msg: "color",
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data: "rgba(" + data[0] + ", " + data[1] + ", " + data[2] + ", " + data[3]/255 + ")"
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},
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"*");
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} catch (e) {
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parent.postMessage({ msg: "exception", data: e.toString() }, "*");
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}
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parent.postMessage({ msg: "done" }, "*");
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}
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</script>
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