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const CANVAS_WIDTH = 200;
const CANVAS_HEIGHT = 100;
async function runDrawWindowTests(snapshotCallback, transparentBackground) {
function make_canvas() {
var canvas = document.createElement("canvas");
canvas.setAttribute("height", CANVAS_HEIGHT);
canvas.setAttribute("width", CANVAS_WIDTH);
document.body.appendChild(canvas);
return canvas;
}
var testCanvas = make_canvas();
var refCanvas = make_canvas();
var testCx = testCanvas.getContext("2d");
var refCx = refCanvas.getContext("2d");
var testWrapCx = SpecialPowers.wrap(testCx);
var refWrapCx = SpecialPowers.wrap(refCx);
function clearRef(fillStyle) {
refCx.setTransform(1, 0, 0, 1, 0, 0);
refCx.fillStyle = fillStyle;
refCx.fillRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);
}
function clearTest(fillStyle) {
testCx.setTransform(1, 0, 0, 1, 0, 0);
testCx.fillStyle = fillStyle;
testCx.fillRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);
}
function clear(fillStyle) {
clearRef(fillStyle);
clearTest(fillStyle);
}
// Basic tests of drawing the whole document on a background
clear("white");
await snapshotCallback(
testWrapCx,
0,
0,
CANVAS_WIDTH,
CANVAS_HEIGHT,
"rgb(255, 255, 255)"
);
refCx.fillStyle = "fuchsia";
refCx.fillRect(10, 10, 20, 20);
refCx.fillStyle = "aqua";
refCx.fillRect(50, 10, 20, 20);
refCx.fillStyle = "yellow";
refCx.fillRect(90, 10, 20, 20);
assertSnapshots(
testCanvas,
refCanvas,
true /* equal */,
null /*no fuzz*/,
"full draw of source on white background",
"reference"
);
clearTest("white");
await snapshotCallback(
testWrapCx,
0,
0,
CANVAS_WIDTH,
CANVAS_HEIGHT,
"rgb(255, 255, 0)"
);
assertSnapshots(
testCanvas,
refCanvas,
!transparentBackground /* not equal */,
null /*no fuzz*/,
"full draw of source on yellow background",
"reference"
);
clearRef("yellow");
refCx.fillStyle = "fuchsia";
refCx.fillRect(10, 10, 20, 20);
refCx.fillStyle = "aqua";
refCx.fillRect(50, 10, 20, 20);
refCx.fillStyle = "yellow";
refCx.fillRect(90, 10, 20, 20);
assertSnapshots(
testCanvas,
refCanvas,
transparentBackground /* equal */,
null /*no fuzz*/,
"full draw of source on yellow background",
"reference"
);
// Test drawing a region within the document.
clear("white");
testCx.translate(17, 31);
await snapshotCallback(testWrapCx, 40, 0, 40, 40, "white");
refCx.fillStyle = "aqua";
refCx.fillRect(17 + 10, 31 + 10, 20, 20);
assertSnapshots(
testCanvas,
refCanvas,
true /* equal */,
null /*no fuzz*/,
"draw of subrect of source with matching background",
"reference"
);
clear("blue");
testCx.translate(17, 31);
await snapshotCallback(testWrapCx, 40, 0, 35, 45, "green");
if (transparentBackground) {
refCx.fillStyle = "green";
} else {
refCx.fillStyle = "white";
}
refCx.fillRect(17, 31, 35, 45);
refCx.fillStyle = "aqua";
refCx.fillRect(17 + 10, 31 + 10, 20, 20);
assertSnapshots(
testCanvas,
refCanvas,
true /* equal */,
null /*no fuzz*/,
"draw of subrect of source with different background",
"reference"
);
// Test transparency of background not disturbing what is behind
clear("blue");
testCx.translate(17, 31);
await snapshotCallback(testWrapCx, 40, 0, 35, 45, "transparent");
if (!transparentBackground) {
refCx.fillStyle = "white";
refCx.fillRect(17, 31, 35, 45);
}
refCx.fillStyle = "aqua";
refCx.fillRect(17 + 10, 31 + 10, 20, 20);
assertSnapshots(
testCanvas,
refCanvas,
true /* equal */,
null /*no fuzz*/,
"draw of subrect of source with different background",
"reference"
);
// Test that multiple drawWindow calls draw at correct positions.
clear("blue");
testCx.translate(9, 3);
// 5, 8 is 5, 2 from the corner of the fuchsia square
await snapshotCallback(testWrapCx, 5, 8, 30, 25, "maroon");
// 35, 0 is 15, 10 from the corner of the aqua square
await snapshotCallback(testWrapCx, 35, 0, 50, 40, "transparent");
testCx.translate(15, 0);
// 85, 5 is 5, 5 from the corner of the yellow square
await snapshotCallback(testWrapCx, 85, 5, 30, 25, "transparent");
if (transparentBackground) {
refCx.fillStyle = "maroon";
refCx.fillRect(9, 3, 30, 25);
refCx.fillStyle = "fuchsia";
refCx.fillRect(9 + 5, 3 + 2, 20, 20);
} else {
refCx.fillStyle = "white";
refCx.fillRect(9, 3, 50, 40);
}
refCx.fillStyle = "aqua";
refCx.fillRect(9 + 15, 3 + 10, 20, 20);
if (!transparentBackground) {
refCx.fillStyle = "white";
refCx.fillRect(9 + 15, 3, 30, 25);
}
refCx.fillStyle = "yellow";
refCx.fillRect(9 + 15 + 5, 3 + 0 + 5, 20, 20);
assertSnapshots(
testCanvas,
refCanvas,
true /* equal */,
null /*no fuzz*/,
"multiple drawWindow calls on top of each other",
"reference"
);
}
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