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<canvas width="200" height="200" id="canvas">FAIL: no canvas support</canvas>
<div id="log"></div>
<script>
if (window.testRunner)
testRunner.dumpAsText();
var canvas = document.getElementById("canvas").getContext("2d");
//four tests
// 1. Infinite dimensions to fillRect
canvas.fillStyle = "green";
canvas.fillRect(0, 0, 100, 100);
canvas.fillStyle = "red";
try {
canvas.fillRect(0, 0, Infinity, Infinity);
} catch (e) {
canvas.fillRect(0, 0, 100, 100);
}
// 2. Infinite dimensions to rect
canvas.fillStyle = "green";
canvas.fillRect(100, 0, 100, 100);
canvas.fillStyle = "red";
try {
canvas.rect(100, 0, Infinity, Infinity);
canvas.fill();
} catch (e) {
canvas.fillRect(100, 0, 100, 100);
}
// 3. Infinite argument to moveTo
canvas.translate(0, 100);
canvas.fillStyle = "red";
canvas.fillRect(0, 0, 100, 100);
canvas.fillStyle = "green";
try {
canvas.beginPath();
canvas.moveTo(Infinity, Infinity);
canvas.rect(0, 0, 100, 100);
canvas.fill();
} catch (e) {
alert(e);
}
// 4. Infinite argument to lineTo
canvas.translate(100, 0);
canvas.fillStyle = "red";
canvas.fillRect(0, 0, 100, 100);
canvas.fillStyle = "green";
try {
canvas.beginPath();
canvas.moveTo(0,0);
canvas.lineTo(100, 0);
canvas.lineTo(100, 100);
canvas.lineTo(0, 100);
canvas.lineTo(Infinity, 100);
canvas.fill();
} catch (e) {
}
function log(msg){
document.getElementById("log").innerHTML += msg + "<br/>";
}
function dataToArray(data) {
var result = new Array(data.length)
for (var i = 0; i < data.length; i++)
result[i] = data[i];
return result;
}
function getPixel(ctx, x, y) {
var data = ctx.getImageData(x,y,1,1);
if (!data) // getImageData failed, which should never happen
return [-1,-1,-1,-1];
return dataToArray(data.data);
}
function pixelShouldBe(ctx, x, y, colour) {
var ctxColour = getPixel(ctx, x, y);
var correct = true;
for (var i = 0; i < 4; i++)
if (colour[i] != ctxColour[i]) {
correct = false;
break;
}
if (correct)
log("PASS: pixel at ("+[x,y]+") was ["+colour+"]");
else
log("FAIL: pixel at ("+[x,y]+") was ["+ctxColour+"], expected ["+colour+"]");
}
var points = [25, 50, 75, 125, 150, 175];
for (var x = 0; x < points.length; x++) {
for (var y = 0; y < points.length; y++) {
pixelShouldBe(canvas, points[x], points[y], [0, 128, 0, 255]);
}
}
</script>
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