cc8a76f3c7
Note to the reviewer: Look at tests/util.js first and then
look at the others. Gerrit lets you ignore whitespace changes,
which I would recommend for this.
This emulates tests on the C++ side and dramatically reduces
boilerplate on the test code.
This also uses the beforeEach(async () => {}) trick to save
a lot of promise resolutions before each tests.
I try to clean up the style a bit as I go, seriously thinking
about adding eslint for at least the tests.
Change-Id: Iced4abb57f66572035ab5d1a54b374055e8aaa58
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281439
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
282 lines
8.9 KiB
JavaScript
282 lines
8.9 KiB
JavaScript
describe('Path Behavior', () => {
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let container;
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beforeEach(async () => {
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await LoadCanvasKit;
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container = document.createElement('div');
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container.innerHTML = `
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<canvas width=600 height=600 id=test></canvas>
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<canvas width=600 height=600 id=report></canvas>`;
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document.body.appendChild(container);
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});
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afterEach(() => {
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document.body.removeChild(container);
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});
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gm('path_api_example', (canvas) => {
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const paint = new CanvasKit.SkPaint();
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paint.setStrokeWidth(1.0);
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paint.setAntiAlias(true);
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paint.setColor(CanvasKit.Color(0, 0, 0, 1.0));
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paint.setStyle(CanvasKit.PaintStyle.Stroke);
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const path = new CanvasKit.SkPath();
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path.moveTo(20, 5);
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path.lineTo(30, 20);
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path.lineTo(40, 10);
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path.lineTo(50, 20);
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path.lineTo(60, 0);
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path.lineTo(20, 5);
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path.moveTo(20, 80);
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path.cubicTo(90, 10, 160, 150, 190, 10);
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path.moveTo(36, 148);
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path.quadTo(66, 188, 120, 136);
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path.lineTo(36, 148);
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path.moveTo(150, 180);
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path.arcTo(150, 100, 50, 200, 20);
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path.lineTo(160, 160);
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path.moveTo(20, 120);
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path.lineTo(20, 120);
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path.transform([2, 0, 0,
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0, 2, 0,
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0, 0, 1 ])
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canvas.drawPath(path, paint);
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const rrect = new CanvasKit.SkPath()
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.addRoundRect(100, 10, 140, 62,
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10, 4, true);
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canvas.drawPath(rrect, paint);
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rrect.delete();
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path.delete();
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paint.delete();
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// See PathKit for more tests, since they share implementation
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});
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it('can create a path from an SVG string', () => {
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//.This is a parallelogram from
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// https://upload.wikimedia.org/wikipedia/commons/e/e7/Simple_parallelogram.svg
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const path = CanvasKit.MakePathFromSVGString('M 205,5 L 795,5 L 595,295 L 5,295 L 205,5 z');
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const cmds = path.toCmds();
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expect(cmds).toBeTruthy();
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// 1 move, 4 lines, 1 close
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// each element in cmds is an array, with index 0 being the verb, and the rest being args
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expect(cmds.length).toBe(6);
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expect(cmds).toEqual([[CanvasKit.MOVE_VERB, 205, 5],
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[CanvasKit.LINE_VERB, 795, 5],
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[CanvasKit.LINE_VERB, 595, 295],
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[CanvasKit.LINE_VERB, 5, 295],
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[CanvasKit.LINE_VERB, 205, 5],
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[CanvasKit.CLOSE_VERB]]);
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path.delete();
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});
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it('can create an SVG string from a path', () => {
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const cmds = [[CanvasKit.MOVE_VERB, 205, 5],
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[CanvasKit.LINE_VERB, 795, 5],
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[CanvasKit.LINE_VERB, 595, 295],
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[CanvasKit.LINE_VERB, 5, 295],
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[CanvasKit.LINE_VERB, 205, 5],
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[CanvasKit.CLOSE_VERB]];
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const path = CanvasKit.MakePathFromCmds(cmds);
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const svgStr = path.toSVGString();
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// We output it in terse form, which is different than Wikipedia's version
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expect(svgStr).toEqual('M205 5L795 5L595 295L5 295L205 5Z');
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path.delete();
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});
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gm('offset_path', (canvas) => {
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const path = starPath(CanvasKit);
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const paint = new CanvasKit.SkPaint();
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paint.setStyle(CanvasKit.PaintStyle.Stroke);
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paint.setStrokeWidth(5.0);
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paint.setAntiAlias(true);
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paint.setColor(CanvasKit.BLACK);
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canvas.clear(CanvasKit.WHITE);
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canvas.drawPath(path, paint);
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path.offset(80, 40);
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canvas.drawPath(path, paint);
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path.delete();
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paint.delete();
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});
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gm('oval_path', (canvas) => {
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const paint = new CanvasKit.SkPaint();
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paint.setStyle(CanvasKit.PaintStyle.Stroke);
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paint.setStrokeWidth(5.0);
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paint.setAntiAlias(true);
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paint.setColor(CanvasKit.BLACK);
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canvas.clear(CanvasKit.WHITE);
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const path = new CanvasKit.SkPath();
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path.moveTo(5, 5);
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path.lineTo(10, 120);
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path.addOval(CanvasKit.LTRBRect(10, 20, 100, 200), false, 3);
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path.lineTo(300, 300);
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canvas.drawPath(path, paint);
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path.delete();
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paint.delete();
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});
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gm('arcto_path', (canvas) => {
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const paint = new CanvasKit.SkPaint();
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paint.setStyle(CanvasKit.PaintStyle.Stroke);
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paint.setStrokeWidth(5.0);
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paint.setAntiAlias(true);
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paint.setColor(CanvasKit.BLACK);
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canvas.clear(CanvasKit.WHITE);
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const path = new CanvasKit.SkPath();
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//path.moveTo(5, 5);
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// takes 4, 5 or 7 args
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// - 5 x1, y1, x2, y2, radius
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path.arcTo(40, 0, 40, 40, 40);
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// - 4 oval (as Rect), startAngle, sweepAngle, forceMoveTo
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path.arcTo(CanvasKit.LTRBRect(90, 10, 120, 200), 30, 300, true);
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// - 7 rx, ry, xAxisRotate, useSmallArc, isCCW, x, y
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path.moveTo(5, 105);
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path.arcTo(24, 24, 45, true, false, 82, 156);
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canvas.drawPath(path, paint);
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path.delete();
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paint.delete();
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});
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gm('path_relative', (canvas) => {
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const paint = new CanvasKit.SkPaint();
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paint.setStrokeWidth(1.0);
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paint.setAntiAlias(true);
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paint.setColor(CanvasKit.Color(0, 0, 0, 1.0));
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paint.setStyle(CanvasKit.PaintStyle.Stroke);
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const path = new CanvasKit.SkPath();
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path.rMoveTo(20, 5)
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.rLineTo(10, 15) // 30, 20
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.rLineTo(10, -5); // 40, 10
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path.rLineTo(10, 10); // 50, 20
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path.rLineTo(10, -20); // 60, 0
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path.rLineTo(-40, 5); // 20, 5
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path.moveTo(20, 80)
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.rCubicTo(70, -70, 140, 70, 170, -70); // 90, 10, 160, 150, 190, 10
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path.moveTo(36, 148)
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.rQuadTo(30, 40, 84, -12) // 66, 188, 120, 136
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.lineTo(36, 148);
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path.moveTo(150, 180)
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.rArcTo(24, 24, 45, true, false, -68, -24); // 82, 156
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path.lineTo(160, 160);
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canvas.drawPath(path, paint);
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path.delete();
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paint.delete();
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});
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it('can measure a path', () => {
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const path = new CanvasKit.SkPath();
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path.moveTo(10, 10)
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.lineTo(40, 50); // should be length 50 because of the 3/4/5 triangle rule
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path.moveTo(80, 0)
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.lineTo(80, 10)
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.lineTo(100, 5)
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.lineTo(80, 0);
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const meas = new CanvasKit.SkPathMeasure(path, false, 1);
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expect(meas.getLength()).toBeCloseTo(50.0, 3);
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const pt = meas.getPosTan(28.7); // arbitrary point
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expect(pt[0]).toBeCloseTo(27.22, 3); // x
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expect(pt[1]).toBeCloseTo(32.96, 3); // y
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expect(pt[2]).toBeCloseTo(0.6, 3); // dy
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expect(pt[3]).toBeCloseTo(0.8, 3); // dy
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const subpath = meas.getSegment(20, 40, true); // make sure this doesn't crash
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expect(meas.nextContour()).toBeTruthy();
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expect(meas.getLength()).toBeCloseTo(51.231, 3);
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expect(meas.nextContour()).toBeFalsy();
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path.delete();
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});
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it('can measure the contours of a path', () => {
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const path = new CanvasKit.SkPath();
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path.moveTo(10, 10)
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.lineTo(40, 50); // should be length 50 because of the 3/4/5 triangle rule
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path.moveTo(80, 0)
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.lineTo(80, 10)
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.lineTo(100, 5)
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.lineTo(80, 0);
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const meas = new CanvasKit.SkContourMeasureIter(path, false, 1);
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let cont = meas.next();
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expect(cont).toBeTruthy();
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expect(cont.length()).toBeCloseTo(50.0, 3);
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const pt = cont.getPosTan(28.7); // arbitrary point
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expect(pt[0]).toBeCloseTo(27.22, 3); // x
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expect(pt[1]).toBeCloseTo(32.96, 3); // y
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expect(pt[2]).toBeCloseTo(0.6, 3); // dy
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expect(pt[3]).toBeCloseTo(0.8, 3); // dy
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const subpath = cont.getSegment(20, 40, true); // make sure this doesn't crash
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cont.delete();
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cont = meas.next();
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expect(cont).toBeTruthy()
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expect(cont.length()).toBeCloseTo(51.231, 3);
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cont.delete();
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expect(meas.next()).toBeFalsy();
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meas.delete();
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path.delete();
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});
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gm('drawpoly_path', (canvas) => {
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const paint = new CanvasKit.SkPaint();
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paint.setStrokeWidth(1.0);
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paint.setAntiAlias(true);
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paint.setColor(CanvasKit.Color(0, 0, 0, 1.0));
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paint.setStyle(CanvasKit.PaintStyle.Stroke);
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const points = [[5, 5], [30, 20], [55, 5], [55, 50], [30, 30], [5, 50]];
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const mPoints = CanvasKit.Malloc(Float32Array, 6 * 2);
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mPoints.set([105, 105, 130, 120, 155, 105, 155, 150, 130, 130, 105, 150]);
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const path = new CanvasKit.SkPath();
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path.addPoly(points, true)
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.moveTo(100, 0)
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.addPoly(mPoints, true);
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canvas.drawPath(path, paint);
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path.delete();
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paint.delete();
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});
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});
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