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// This is a regression test for bug https://bugs.webkit.org/show_bug.cgi?id=89018
description("Tests that disabling the imageSmoothingEnabled attribute still works after multiple repaints");
var dstCanvas = document.getElementById("destination");
var dstCtx = dstCanvas.getContext('2d');
var srcCanvas = document.getElementById("source");
var srcCtx = srcCanvas.getContext('2d');
var srcCanvas, srcCtx, dstCanvas, dstCtx;
function draw()
{
srcCtx.clearRect(0, 0, 300, 300);
dstCtx.clearRect(0, 0, 300, 300);
srcCtx.fillStyle = "rgb(255, 0, 0)";
srcCtx.fillRect(0, 0, 1, 1);
srcCtx.fillStyle = "rgb(0, 255, 0)";
srcCtx.fillRect(1, 0, 1, 1);
dstCtx.webkitImageSmoothingEnabled = false;
dstCtx.drawImage(srcCanvas, 0, 0, 2, 1, 0, 0, 300, 300);
}
function testResult() {
debug("Test that the image is not filtered");
left_of_center_pixel = dstCtx.getImageData(149, 150, 1, 1);
shouldBe("left_of_center_pixel.data[0]", "255");
shouldBe("left_of_center_pixel.data[1]", "0");
shouldBe("left_of_center_pixel.data[2]", "0");
right_of_center_pixel = dstCtx.getImageData(150, 150, 1, 1);
shouldBe("right_of_center_pixel.data[0]", "0");
shouldBe("right_of_center_pixel.data[1]", "255");
shouldBe("right_of_center_pixel.data[2]", "0");
finishJSTest();
}
// Bug 89018 requires 2 draw iteration in order to manifest itself.
var drawIterations = 2;
// Unrolled repaint loop for running the test in DumpRenderTree
function TestControllerPaint() {
while (drawIterations > 0) {
draw();
layoutTestController.display();
drawIterations = drawIterations - 1;
}
draw();
testResult();
}
// Repaint loop for running the test in the browser
function BrowserPaint(){
draw();
if (drawIterations > 0) {
drawIterations = drawIterations - 1;
window.webkitRequestAnimationFrame(BrowserPaint);
} else {
testResult();
}
}
function onLoadHandler()
{
if (window.layoutTestController) {
TestControllerPaint();
} else {
BrowserPaint();
}
}
window.jsTestIsAsync = true;
window.onload = onLoadHandler;
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