| |
| describe('CanvasKit\'s Path Behavior', function() { |
| // Note, don't try to print the CanvasKit object - it can cause Karma/Jasmine to lock up. |
| var CanvasKit = null; |
| const LoadCanvasKit = new Promise(function(resolve, reject) { |
| if (CanvasKit) { |
| resolve(); |
| } else { |
| CanvasKitInit({ |
| locateFile: (file) => '/canvaskit/'+file, |
| }).then((_CanvasKit) => { |
| CanvasKit = _CanvasKit; |
| CanvasKit.initFonts(); |
| resolve(); |
| }); |
| } |
| }); |
| |
| let container = document.createElement('div'); |
| document.body.appendChild(container); |
| const CANVAS_WIDTH = 600; |
| const CANVAS_HEIGHT = 600; |
| |
| beforeEach(function() { |
| container.innerHTML = ` |
| <canvas width=600 height=600 id=test></canvas> |
| <canvas width=600 height=600 id=report></canvas>`; |
| }); |
| |
| afterEach(function() { |
| container.innerHTML = ''; |
| }); |
| |
| function getSurface() { |
| if (CanvasKit.gpu) { |
| return CanvasKit.getWebGLSurface('test'); |
| } |
| return CanvasKit.getRasterN32PremulSurface('test'); |
| } |
| |
| |
| function reportSurface(surface, testname, done) { |
| // In docker, the webgl canvas is blank, but the surface has the pixel |
| // data. So, we copy it out and draw it to a normal canvas to take a picture. |
| // To be consistent across CPU and GPU, we just do it for all configurations |
| // (even though the CPU canvas shows up after flush just fine). |
| let pixelLen = CANVAS_WIDTH * CANVAS_HEIGHT * 4; // 4 bytes for r,g,b,a |
| let pixelPtr = CanvasKit._malloc(pixelLen); |
| let success = surface._readPixels(CANVAS_WIDTH, CANVAS_HEIGHT, pixelPtr); |
| if (!success) { |
| done(); |
| expect(success).toBeFalsy('could not read pixels'); |
| return; |
| } |
| let pixels = new Uint8ClampedArray(CanvasKit.buffer, pixelPtr, pixelLen); |
| var imageData = new ImageData(pixels, CANVAS_WIDTH, CANVAS_HEIGHT); |
| |
| let reportingCanvas = document.getElementById('report'); |
| reportingCanvas.getContext('2d').putImageData(imageData, 0, 0); |
| CanvasKit._free(pixelPtr); |
| reportCanvas(reportingCanvas, testname).then(() => { |
| done(); |
| }).catch(reportError(done)); |
| } |
| |
| it('can draw a path', function(done) { |
| LoadCanvasKit.then(() => { |
| // This is taken from example.html |
| const surface = getSurface(); |
| expect(surface).toBeTruthy('Could not make surface') |
| if (!surface) { |
| done(); |
| return; |
| } |
| const canvas = surface.getCanvas(); |
| const paint = new CanvasKit.SkPaint(); |
| paint.setStrokeWidth(1.0); |
| paint.setAntiAlias(true); |
| paint.setColor(CanvasKit.Color(0, 0, 0, 1.0)); |
| paint.setStyle(CanvasKit.PaintStyle.STROKE); |
| |
| const path = new CanvasKit.SkPath(); |
| 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.cubicTo(90, 10, 160, 150, 190, 10); |
| |
| path.moveTo(36, 148); |
| path.quadTo(66, 188, 120, 136); |
| path.lineTo(36, 148); |
| |
| path.moveTo(150, 180); |
| path.arcTo(150, 100, 50, 200, 20); |
| path.lineTo(160, 160); |
| |
| path.moveTo(20, 120); |
| path.lineTo(20, 120); |
| |
| path.transform([2, 0, 0, |
| 0, 2, 0, |
| 0, 0, 1 ]) |
| |
| canvas.drawPath(path, paint); |
| surface.flush(); |
| |
| path.delete(); |
| paint.delete(); |
| |
| reportSurface(surface, 'path_api_example', done); |
| }); |
| // See CanvasKit for more tests, since they share implementation |
| }); |
| |
| function starPath(CanvasKit, X=128, Y=128, R=116) { |
| let p = new CanvasKit.SkPath(); |
| p.moveTo(X + R, Y); |
| for (let i = 1; i < 8; i++) { |
| let a = 2.6927937 * i; |
| p.lineTo(X + R * Math.cos(a), Y + R * Math.sin(a)); |
| } |
| return p; |
| } |
| |
| it('can apply an effect and draw text', function(done) { |
| LoadCanvasKit.then(() => { |
| const surface = getSurface(); |
| expect(surface).toBeTruthy('Could not make surface') |
| if (!surface) { |
| done(); |
| return; |
| } |
| const canvas = surface.getCanvas(); |
| const path = starPath(CanvasKit); |
| |
| const paint = new CanvasKit.SkPaint(); |
| |
| const textPaint = new CanvasKit.SkPaint(); |
| textPaint.setColor(CanvasKit.Color(40, 0, 0, 1.0)); |
| textPaint.setTextSize(30); |
| textPaint.setAntiAlias(true); |
| |
| const dpe = CanvasKit.MakeSkDashPathEffect([15, 5, 5, 10], 1); |
| |
| paint.setPathEffect(dpe); |
| paint.setStyle(CanvasKit.PaintStyle.STROKE); |
| paint.setStrokeWidth(5.0); |
| paint.setAntiAlias(true); |
| paint.setColor(CanvasKit.Color(66, 129, 164, 1.0)); |
| |
| canvas.clear(CanvasKit.Color(255, 255, 255, 1.0)); |
| |
| canvas.drawPath(path, paint); |
| canvas.drawText('This is text', 10, 280, textPaint); |
| surface.flush(); |
| dpe.delete(); |
| path.delete(); |
| |
| reportSurface(surface, 'effect_and_text_example', done); |
| }); |
| }); |
| }); |