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var RGBAValues = [
[42, 142, 23, 148],
[234, 165, 177, 91],
[74, 228, 75, 195],
[140, 108, 73, 65],
[25, 177, 3, 201],
[127, 104, 12, 199],
[196, 93, 240, 131],
[250, 121, 231, 189],
[175, 131, 215, 190],
[145, 122, 166, 70],
[18, 196, 210, 162],
[225, 1, 90, 188],
[223, 216, 182, 233],
[115, 48, 168, 56],
[50, 206, 198, 199],
[152, 28, 70, 130],
[176, 134, 133, 51],
[148, 46, 43, 144],
[78, 171, 141, 95],
[24, 177, 102, 110],
[0, 27, 127, 91],
[31, 221, 41, 170],
[85, 7, 218, 146],
[65, 30, 198, 238],
[121, 56, 123, 88],
[246, 39, 140, 146],
[174, 195, 254, 149],
[29, 153, 92, 116],
[17, 240, 5, 111],
[38, 162, 84, 143],
[237, 159, 201, 244],
[93, 68, 14, 246],
[143, 142, 82, 221],
[187, 215, 243, 154],
[24, 121, 220, 53],
[80, 153, 151, 219],
[202, 241, 250, 191],
];
function createOneTest(rgbaValue) {
return new Promise(function (resolve, reject) {
var tolerance = 5;
var r = rgbaValue[0];
var g = rgbaValue[1];
var b = rgbaValue[2];
var a = rgbaValue[3];
var imageData = new ImageData(new Uint8ClampedArray([r, g, b, a]), 1, 1);
var newImageData;
createImageBitmap(imageData).then(
function (imageBitmap) {
var context = document.createElement("canvas").getContext("2d");
context.drawImage(imageBitmap, 0, 0);
newImageData = context.getImageData(0, 0, 1, 1);
var newR = newImageData.data[0];
var newG = newImageData.data[1];
var newB = newImageData.data[2];
var newA = newImageData.data[3];
var isTheSame =
Math.abs(r - newR) <= tolerance &&
Math.abs(g - newG) <= tolerance &&
Math.abs(b - newB) <= tolerance &&
Math.abs(a - newA) <= tolerance;
ok(
isTheSame,
"newImageData(" +
newR +
"," +
newG +
"," +
newB +
"," +
newA +
") should equal to imageData(" +
r +
"," +
g +
"," +
b +
"," +
a +
")." +
"Premultiplied Alpha is handled while creating ImageBitmap from ImageData."
);
if (isTheSame) {
resolve();
} else {
reject();
}
},
function () {
reject();
}
);
});
}
function testBug1239752() {
var tests = [];
for (var i = 0; i < RGBAValues.length; ++i) {
tests.push(createOneTest(RGBAValues[i]));
}
return Promise.all(tests);
}