blob: f1eae3aa94803c50ead0d4138cdf4b14abcf35f5 [file] [log] [blame]
describe('PathKit\'s Path2D API', function() {
// Note, don't try to print the PathKit object - it can cause Karma/Jasmine to lock up.
var PathKit = null;
const LoadPathKit = new Promise(function(resolve, reject) {
if (PathKit) {
resolve();
} else {
PathKitInit({
locateFile: (file) => '/pathkit/'+file,
}).then((_PathKit) => {
PathKit = _PathKit;
resolve();
});
}
});
it('can do everything in the Path2D API w/o crashing', function(done) {
LoadPathKit.then(() => {
// This is taken from example.html
let path = PathKit.NewPath();
path.moveTo(20, 5);
path.lineTo(30, 20);
path.lineTo(40, 10);
path.lineTo(50, 20);
path.lineTo(60, 0);
path.lineTo(20, 5);
path.moveTo(20, 80);
path.bezierCurveTo(90, 10, 160, 150, 190, 10);
path.moveTo(36, 148);
path.quadraticCurveTo(66, 188, 120, 136);
path.lineTo(36, 148);
path.rect(5, 170, 20, 20);
path.moveTo(150, 180);
path.arcTo(150, 100, 50, 200, 20);
path.lineTo(160, 160);
path.moveTo(20, 120);
path.arc(20, 120, 18, 0, 1.75 * Math.PI);
path.lineTo(20, 120);
let secondPath = PathKit.NewPath();
secondPath.ellipse(130, 25, 30, 10, -1*Math.PI/8, Math.PI/6, 1.5*Math.PI, false);
path.addPath(secondPath);
let m = document.createElementNS('http://www.w3.org/2000/svg', 'svg').createSVGMatrix();
m.a = 1; m.b = 0;
m.c = 0; m.d = 1;
m.e = 0; m.f = 20.5;
path.addPath(secondPath, m);
let canvas = document.createElement('canvas');
let canvasCtx = canvas.getContext('2d');
// Set canvas size and make it a bit bigger to zoom in on the lines
standardizedCanvasSize(canvasCtx);
canvasCtx.scale(3.0, 3.0);
canvasCtx.fillStyle = 'blue';
canvasCtx.stroke(path.toPath2D());
let svgPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');
svgPath.setAttribute('stroke', 'black');
svgPath.setAttribute('fill', 'rgba(255,255,255,0.0)');
svgPath.setAttribute('transform', 'scale(3.0, 3.0)');
svgPath.setAttribute('d', path.toSVGString());
let newSVG = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
newSVG.appendChild(svgPath);
newSVG.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
newSVG.setAttribute('width', 600);
newSVG.setAttribute('height', 600);
path.delete();
secondPath.delete();
reportCanvas(canvas, 'path2D_api_example').then(() => {
reportSVG(newSVG, 'path2D_api_example').then(() => {
done();
}).catch(reportError(done));
}).catch(reportError(done));
});
});
it('can chain by returning the same object', function(done) {
LoadPathKit.then(() => {
let path = PathKit.NewPath();
let p1 = path.moveTo(20, 5)
.lineTo(30, 20)
.quadTo(66, 188, 120, 136)
.close();
// these should be the same object
expect(path === p1).toBe(true);
p1.delete();
try {
// This should throw an exception because
// the underlying path was already deleted.
path.delete();
expect('should not have gotten here').toBe(false);
} catch (e) {
// all is well
}
done();
});
});
it('does not leak path objects when chaining', function(done) {
LoadPathKit.then(() => {
// By default, we have 16 MB of memory assigned to our PathKit
// library. This can be configured by -S TOTAL_MEMORY=NN
// and defaults to 16MB (we likely don't need to touch this).
// If there's a leak in here, we should OOM pretty quick.
// Testing showed around 50k is enough to see one if we leak a path,
// so run 250k times just to be safe.
for(let i = 0; i < 250000; i++) {
let path = PathKit.NewPath()
.moveTo(20, 5)
.lineTo(30, 20)
.quadTo(66, 188, 120, 136)
.close();
path.delete();
}
done();
});
});
function drawTriangle() {
let path = PathKit.NewPath();
path.moveTo(0, 0);
path.lineTo(10, 0);
path.lineTo(10, 10);
path.close();
return path;
}
it('has multiple overloads of addPath', function(done) {
LoadPathKit.then(() => {
let basePath = PathKit.NewPath();
let otherPath = drawTriangle();
// These add path call can be chained.
// add it unchanged
basePath.addPath(otherPath)
// providing the 6 params of an SVG matrix to make it appear 20.5 px down
.addPath(otherPath, 1, 0, 0, 1, 0, 20.5)
// provide the full 9 matrix params to make it appear 30 px to the right
// and be 3 times as big.
.addPath(otherPath, 3, 0, 30,
0, 3, 0,
0, 0, 1);
reportPath(basePath, 'add_path_3x', done);
basePath.delete();
otherPath.delete();
});
});
it('approximates arcs (conics) with quads', function(done) {
LoadPathKit.then(() => {
let path = PathKit.NewPath();
path.moveTo(50, 120);
path.arc(50, 120, 45, 0, 1.75 * Math.PI);
path.lineTo(50, 120);
let canvas = document.createElement('canvas');
let canvasCtx = canvas.getContext('2d');
standardizedCanvasSize(canvasCtx);
// The and.callThrough is important to make it actually
// draw the quadratics
spyOn(canvasCtx, 'quadraticCurveTo').and.callThrough();
canvasCtx.beginPath();
path.toCanvas(canvasCtx);
canvasCtx.stroke();
// No need to check the whole path, as that's more what the
// gold correctness tests are for (can account for changes we make
// to the approximation algorithms).
expect(canvasCtx.quadraticCurveTo).toHaveBeenCalled();
path.delete();
reportCanvas(canvas, 'conics_quads_approx').then(() => {
done();
}).catch(reportError(done));
});
});
});