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function _valToString(val)
{
if (val === undefined || val === null)
return '[' + typeof(val) + ']';
return val.toString() + '[' + typeof(val) + ']';
}
function _assert(cond, text)
{
assert_true(!!cond, text);
}
function _assertSame(a, b, text_a, text_b)
{
var msg = text_a + ' === ' + text_b + ' (got ' + _valToString(a) +
', expected ' + _valToString(b) + ')';
assert_equals(a, b, msg);
}
function _assertDifferent(a, b, text_a, text_b)
{
var msg = text_a + ' !== ' + text_b + ' (got ' + _valToString(a) +
', expected not ' + _valToString(b) + ')';
assert_not_equals(a, b, msg);
}
function _getPixel(canvas, x,y)
{
var ctx = canvas.getContext('2d');
var imgdata = ctx.getImageData(x, y, 1, 1);
return [ imgdata.data[0], imgdata.data[1], imgdata.data[2], imgdata.data[3] ];
}
function _assertPixel(canvas, x,y, r,g,b,a, pos, colour)
{
var c = _getPixel(canvas, x,y);
assert_equals(c[0], r, 'Red channel of the pixel at (' + x + ', ' + y + ')');
assert_equals(c[1], g, 'Green channel of the pixel at (' + x + ', ' + y + ')');
assert_equals(c[2], b, 'Blue channel of the pixel at (' + x + ', ' + y + ')');
assert_equals(c[3], a, 'Alpha channel of the pixel at (' + x + ', ' + y + ')');
}
function _assertPixelApprox(canvas, x,y, r,g,b,a, pos, colour, tolerance)
{
var c = _getPixel(canvas, x,y);
assert_approx_equals(c[0], r, tolerance, 'Red channel of the pixel at (' + x + ', ' + y + ')');
assert_approx_equals(c[1], g, tolerance, 'Green channel of the pixel at (' + x + ', ' + y + ')');
assert_approx_equals(c[2], b, tolerance, 'Blue channel of the pixel at (' + x + ', ' + y + ')');
assert_approx_equals(c[3], a, tolerance, 'Alpha channel of the pixel at (' + x + ', ' + y + ')');
}
function _addTest(testFn)
{
var deferred = false;
window.deferTest = function () { deferred = true; };
on_event(window, "load", function()
{
t.step(function() {
var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
t.step(testFn, window, canvas, ctx);
});
if (!deferred) {
t.done();
}
});
}
function _assertGreen(ctx, canvasWidth, canvasHeight)
{
var testColor = function(d, idx, expected) {
assert_equals(d[idx], expected, "d[" + idx + "]", String(expected));
};
var imagedata = ctx.getImageData(0, 0, canvasWidth, canvasHeight);
var w = imagedata.width, h = imagedata.height, d = imagedata.data;
for (var i = 0; i < h; ++i) {
for (var j = 0; j < w; ++j) {
testColor(d, 4 * (w * i + j) + 0, 0);
testColor(d, 4 * (w * i + j) + 1, 255);
testColor(d, 4 * (w * i + j) + 2, 0);
testColor(d, 4 * (w * i + j) + 3, 255);
}
}
}
function addCrossOriginYellowImage()
{
var img = new Image();
img.id = "yellow.png";
img.className = "resource";
img.src = get_host_info().HTTP_REMOTE_ORIGIN + "/images/yellow.png";
document.body.appendChild(img);
}
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