| describe('CanvasKit\'s Canvas 2d Behavior', function() { |
| |
| 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>`; |
| }); |
| |
| afterEach(function() { |
| container.innerHTML = ''; |
| }); |
| |
| describe('color strings', function() { |
| function hex(s) { |
| return parseInt(s, 16); |
| } |
| |
| it('parses hex color strings', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const parseColor = CanvasKit._testing.parseColor; |
| expect(parseColor('#FED')).toEqual( |
| CanvasKit.Color(hex('FF'), hex('EE'), hex('DD'), 1)); |
| expect(parseColor('#FEDC')).toEqual( |
| CanvasKit.Color(hex('FF'), hex('EE'), hex('DD'), hex('CC')/255)); |
| expect(parseColor('#fed')).toEqual( |
| CanvasKit.Color(hex('FF'), hex('EE'), hex('DD'), 1)); |
| expect(parseColor('#fedc')).toEqual( |
| CanvasKit.Color(hex('FF'), hex('EE'), hex('DD'), hex('CC')/255)); |
| done(); |
| })); |
| }); |
| it('parses rgba color strings', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const parseColor = CanvasKit._testing.parseColor; |
| expect(parseColor('rgba(117, 33, 64, 0.75)')).toEqual( |
| CanvasKit.Color(117, 33, 64, 0.75)); |
| expect(parseColor('rgb(117, 33, 64, 0.75)')).toEqual( |
| CanvasKit.Color(117, 33, 64, 0.75)); |
| expect(parseColor('rgba(117,33,64)')).toEqual( |
| CanvasKit.Color(117, 33, 64, 1.0)); |
| expect(parseColor('rgb(117,33, 64)')).toEqual( |
| CanvasKit.Color(117, 33, 64, 1.0)); |
| done(); |
| })); |
| }); |
| it('parses named color strings', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const parseColor = CanvasKit._testing.parseColor; |
| expect(parseColor('grey')).toEqual( |
| CanvasKit.Color(128, 128, 128, 1.0)); |
| expect(parseColor('blanchedalmond')).toEqual( |
| CanvasKit.Color(255, 235, 205, 1.0)); |
| expect(parseColor('transparent')).toEqual( |
| CanvasKit.Color(0, 0, 0, 0)); |
| done(); |
| })); |
| }); |
| |
| it('properly produces color strings', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const colorToString = CanvasKit._testing.colorToString; |
| |
| expect(colorToString(CanvasKit.Color(102, 51, 153, 1.0))).toEqual('#663399'); |
| |
| expect(colorToString(CanvasKit.Color(255, 235, 205, 0.5))).toEqual( |
| 'rgba(255, 235, 205, 0.50196078)'); |
| |
| done(); |
| })); |
| }); |
| |
| it('can multiply colors by alpha', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const multiplyByAlpha = CanvasKit.multiplyByAlpha; |
| |
| const testCases = [ |
| { |
| inColor: CanvasKit.Color(102, 51, 153, 1.0), |
| inAlpha: 1.0, |
| outColor: CanvasKit.Color(102, 51, 153, 1.0), |
| }, |
| { |
| inColor: CanvasKit.Color(102, 51, 153, 1.0), |
| inAlpha: 0.8, |
| outColor: CanvasKit.Color(102, 51, 153, 0.8), |
| }, |
| { |
| inColor: CanvasKit.Color(102, 51, 153, 0.8), |
| inAlpha: 0.7, |
| outColor: CanvasKit.Color(102, 51, 153, 0.56), |
| }, |
| { |
| inColor: CanvasKit.Color(102, 51, 153, 0.8), |
| inAlpha: 1000, |
| outColor: CanvasKit.Color(102, 51, 153, 1.0), |
| }, |
| ]; |
| |
| for (let tc of testCases) { |
| // Print out the test case if the two don't match. |
| expect(multiplyByAlpha(tc.inColor, tc.inAlpha)) |
| .toBe(tc.outColor, JSON.stringify(tc)); |
| } |
| |
| done(); |
| })); |
| }); |
| }); // end describe('color string parsing') |
| |
| describe('fonts', function() { |
| it('can parse font sizes', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const parseFontString = CanvasKit._testing.parseFontString; |
| |
| const tests = [{ |
| 'input': '10px monospace', |
| 'output': { |
| 'style': '', |
| 'variant': '', |
| 'weight': '', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| { |
| 'input': '15pt Arial', |
| 'output': { |
| 'style': '', |
| 'variant': '', |
| 'weight': '', |
| 'sizePx': 20, |
| 'family': 'Arial', |
| } |
| }, |
| { |
| 'input': '1.5in Arial, san-serif ', |
| 'output': { |
| 'style': '', |
| 'variant': '', |
| 'weight': '', |
| 'sizePx': 144, |
| 'family': 'Arial, san-serif', |
| } |
| }, |
| { |
| 'input': '1.5em SuperFont', |
| 'output': { |
| 'style': '', |
| 'variant': '', |
| 'weight': '', |
| 'sizePx': 24, |
| 'family': 'SuperFont', |
| } |
| }, |
| ]; |
| |
| for (let i = 0; i < tests.length; i++) { |
| expect(parseFontString(tests[i].input)).toEqual(tests[i].output); |
| } |
| |
| done(); |
| })); |
| }); |
| |
| it('can parse font attributes', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const parseFontString = CanvasKit._testing.parseFontString; |
| |
| const tests = [{ |
| 'input': 'bold 10px monospace', |
| 'output': { |
| 'style': '', |
| 'variant': '', |
| 'weight': 'bold', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| { |
| 'input': 'italic bold 10px monospace', |
| 'output': { |
| 'style': 'italic', |
| 'variant': '', |
| 'weight': 'bold', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| { |
| 'input': 'italic small-caps bold 10px monospace', |
| 'output': { |
| 'style': 'italic', |
| 'variant': 'small-caps', |
| 'weight': 'bold', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| { |
| 'input': 'small-caps bold 10px monospace', |
| 'output': { |
| 'style': '', |
| 'variant': 'small-caps', |
| 'weight': 'bold', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| { |
| 'input': 'italic 10px monospace', |
| 'output': { |
| 'style': 'italic', |
| 'variant': '', |
| 'weight': '', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| { |
| 'input': 'small-caps 10px monospace', |
| 'output': { |
| 'style': '', |
| 'variant': 'small-caps', |
| 'weight': '', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| { |
| 'input': 'normal bold 10px monospace', |
| 'output': { |
| 'style': 'normal', |
| 'variant': '', |
| 'weight': 'bold', |
| 'sizePx': 10, |
| 'family': 'monospace', |
| } |
| }, |
| ]; |
| |
| for (let i = 0; i < tests.length; i++) { |
| expect(parseFontString(tests[i].input)).toEqual(tests[i].output); |
| } |
| |
| done(); |
| })); |
| }); |
| }); |
| |
| function multipleCanvasTest(testname, done, test) { |
| const skcanvas = CanvasKit.MakeCanvas(CANVAS_WIDTH, CANVAS_HEIGHT); |
| skcanvas._config = 'software_canvas'; |
| const realCanvas = document.getElementById('test'); |
| realCanvas._config = 'html_canvas'; |
| realCanvas.width = CANVAS_WIDTH; |
| realCanvas.height = CANVAS_HEIGHT; |
| |
| let promises = []; |
| |
| for (let canvas of [skcanvas, realCanvas]) { |
| test(canvas); |
| // canvas has .toDataURL (even though skcanvas is not a real Canvas) |
| // so this will work. |
| promises.push(reportCanvas(canvas, testname, canvas._config)); |
| } |
| Promise.all(promises).then(() => { |
| skcanvas.dispose(); |
| done(); |
| }).catch(reportError(done)); |
| } |
| |
| describe('CanvasContext2D API', function() { |
| it('supports all the line types', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| multipleCanvasTest('all_line_drawing_operations', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| ctx.scale(3.0, 3.0); |
| ctx.moveTo(20, 5); |
| ctx.lineTo(30, 20); |
| ctx.lineTo(40, 10); |
| ctx.lineTo(50, 20); |
| ctx.lineTo(60, 0); |
| ctx.lineTo(20, 5); |
| |
| ctx.moveTo(20, 80); |
| ctx.bezierCurveTo(90, 10, 160, 150, 190, 10); |
| |
| ctx.moveTo(36, 148); |
| ctx.quadraticCurveTo(66, 188, 120, 136); |
| ctx.lineTo(36, 148); |
| |
| ctx.rect(5, 170, 20, 25); |
| |
| ctx.moveTo(150, 180); |
| ctx.arcTo(150, 100, 50, 200, 20); |
| ctx.lineTo(160, 160); |
| |
| ctx.moveTo(20, 120); |
| ctx.arc(20, 120, 18, 0, 1.75 * Math.PI); |
| ctx.lineTo(20, 120); |
| |
| ctx.moveTo(150, 5); |
| ctx.ellipse(130, 25, 30, 10, -1*Math.PI/8, Math.PI/6, 1.5*Math.PI) |
| |
| ctx.lineWidth = 2; |
| ctx.stroke(); |
| |
| // Test edgecases and draw direction |
| ctx.beginPath(); |
| ctx.arc(50, 100, 10, Math.PI, -Math.PI/2); |
| ctx.stroke(); |
| ctx.beginPath(); |
| ctx.arc(75, 100, 10, Math.PI, -Math.PI/2, true); |
| ctx.stroke(); |
| ctx.beginPath(); |
| ctx.arc(100, 100, 10, Math.PI, 100.1 * Math.PI, true); |
| ctx.stroke(); |
| ctx.beginPath(); |
| ctx.arc(125, 100, 10, Math.PI, 100.1 * Math.PI, false); |
| ctx.stroke(); |
| ctx.beginPath(); |
| ctx.ellipse(155, 100, 10, 15, Math.PI/8, 100.1 * Math.PI, Math.PI, true); |
| ctx.stroke(); |
| ctx.beginPath(); |
| ctx.ellipse(180, 100, 10, 15, Math.PI/8, Math.PI, 100.1 * Math.PI, true); |
| ctx.stroke(); |
| }); |
| })); |
| }); |
| |
| it('handles all the transforms as specified', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| multipleCanvasTest('all_matrix_operations', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| ctx.rect(10, 10, 20, 20); |
| |
| ctx.scale(2.0, 4.0); |
| ctx.rect(30, 10, 20, 20); |
| ctx.resetTransform(); |
| |
| ctx.rotate(Math.PI / 3); |
| ctx.rect(50, 10, 20, 20); |
| ctx.resetTransform(); |
| |
| ctx.translate(30, -2); |
| ctx.rect(70, 10, 20, 20); |
| ctx.resetTransform(); |
| |
| ctx.translate(60, 0); |
| ctx.rotate(Math.PI / 6); |
| ctx.transform(1.5, 0, 0, 0.5, 0, 0, 0); // effectively scale |
| ctx.rect(90, 10, 20, 20); |
| ctx.resetTransform(); |
| |
| ctx.save(); |
| ctx.setTransform(2, 0, -.5, 2.5, -40, 120); |
| ctx.rect(110, 10, 20, 20); |
| ctx.lineTo(110, 0); |
| ctx.restore(); |
| ctx.lineTo(220, 120); |
| |
| ctx.scale(3.0, 3.0); |
| ctx.font = '6pt Noto Mono'; |
| ctx.fillText('This text should be huge', 10, 80); |
| ctx.resetTransform(); |
| |
| ctx.strokeStyle = 'black'; |
| ctx.lineWidth = 2; |
| ctx.stroke(); |
| |
| ctx.beginPath(); |
| ctx.moveTo(250, 30); |
| ctx.lineTo(250, 80); |
| ctx.scale(3.0, 3.0); |
| ctx.lineTo(280/3, 90/3); |
| ctx.closePath(); |
| ctx.strokeStyle = 'black'; |
| ctx.lineWidth = 5; |
| ctx.stroke(); |
| }); |
| })); |
| }); |
| |
| it('properly saves and restores states, even when drawing shadows', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| multipleCanvasTest('shadows_and_save_restore', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| ctx.strokeStyle = '#000'; |
| ctx.fillStyle = '#CCC'; |
| ctx.shadowColor = 'rebeccapurple'; |
| ctx.shadowBlur = 1; |
| ctx.shadowOffsetX = 3; |
| ctx.shadowOffsetY = -8; |
| ctx.rect(10, 10, 30, 30); |
| |
| ctx.save(); |
| ctx.strokeStyle = '#C00'; |
| ctx.fillStyle = '#00C'; |
| ctx.shadowBlur = 0; |
| ctx.shadowColor = 'transparent'; |
| |
| ctx.stroke(); |
| |
| ctx.restore(); |
| ctx.fill(); |
| |
| ctx.beginPath(); |
| ctx.moveTo(36, 148); |
| ctx.quadraticCurveTo(66, 188, 120, 136); |
| ctx.closePath(); |
| ctx.stroke(); |
| |
| ctx.beginPath(); |
| ctx.shadowColor = '#993366AA'; |
| ctx.shadowOffsetX = 8; |
| ctx.shadowBlur = 5; |
| ctx.setTransform(2, 0, -.5, 2.5, -40, 120); |
| ctx.rect(110, 10, 20, 20); |
| ctx.lineTo(110, 0); |
| ctx.resetTransform(); |
| ctx.lineTo(220, 120); |
| ctx.stroke(); |
| |
| ctx.fillStyle = 'green'; |
| ctx.font = '16pt Noto Mono'; |
| ctx.fillText('This should be shadowed', 20, 80); |
| |
| ctx.beginPath(); |
| ctx.lineWidth = 6; |
| ctx.ellipse(10, 290, 30, 30, 0, 0, Math.PI * 2); |
| ctx.scale(2, 1); |
| ctx.moveTo(10, 290) |
| ctx.ellipse(10, 290, 30, 60, 0, 0, Math.PI * 2); |
| ctx.resetTransform(); |
| ctx.shadowColor = '#993366AA'; |
| ctx.scale(3, 1); |
| ctx.moveTo(10, 290) |
| ctx.ellipse(10, 290, 30, 90, 0, 0, Math.PI * 2); |
| ctx.stroke(); |
| }); |
| })); |
| }); |
| |
| it('fills/strokes rects and supports some global settings', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| multipleCanvasTest('global_dashed_rects', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| ctx.scale(1.1, 1.1); |
| ctx.translate(10, 10); |
| // Shouldn't impact the fillRect calls |
| ctx.setLineDash([5, 3]); |
| |
| ctx.fillStyle = 'rgba(200, 0, 100, 0.81)'; |
| ctx.fillRect(20, 30, 100, 100); |
| |
| ctx.globalAlpha = 0.81; |
| ctx.fillStyle = 'rgba(200, 0, 100, 1.0)'; |
| ctx.fillRect(120, 30, 100, 100); |
| // This shouldn't do anything |
| ctx.globalAlpha = 0.1; |
| |
| ctx.fillStyle = 'rgba(200, 0, 100, 0.9)'; |
| ctx.globalAlpha = 0.9; |
| // Intentional no-op to check ordering |
| ctx.clearRect(220, 30, 100, 100); |
| ctx.fillRect(220, 30, 100, 100); |
| |
| ctx.fillRect(320, 30, 100, 100); |
| ctx.clearRect(330, 40, 80, 80); |
| |
| ctx.strokeStyle = 'blue'; |
| ctx.lineWidth = 3; |
| ctx.setLineDash([5, 3]); |
| ctx.strokeRect(20, 150, 100, 100); |
| ctx.setLineDash([50, 30]); |
| ctx.strokeRect(125, 150, 100, 100); |
| ctx.lineDashOffset = 25; |
| ctx.strokeRect(230, 150, 100, 100); |
| ctx.setLineDash([2, 5, 9]); |
| ctx.strokeRect(335, 150, 100, 100); |
| |
| ctx.setLineDash([5, 2]); |
| ctx.moveTo(336, 400); |
| ctx.quadraticCurveTo(366, 488, 120, 450); |
| ctx.lineTo(300, 400); |
| ctx.stroke(); |
| |
| ctx.font = '36pt Noto Mono'; |
| ctx.strokeText('Dashed', 20, 350); |
| ctx.fillText('Not Dashed', 20, 400); |
| }); |
| })); |
| }); |
| |
| it('supports gradients, which respect clip/save/restore', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| multipleCanvasTest('gradients_clip', done, (canvas) => { |
| const ctx = canvas.getContext('2d'); |
| |
| const rgradient = ctx.createRadialGradient(200, 300, 10, 100, 100, 300); |
| |
| rgradient.addColorStop(0, 'red'); |
| rgradient.addColorStop(.7, 'white'); |
| rgradient.addColorStop(1, 'blue'); |
| |
| ctx.fillStyle = rgradient; |
| ctx.globalAlpha = 0.7; |
| ctx.fillRect(0,0,600,600); |
| ctx.globalAlpha = 0.95; |
| |
| ctx.beginPath(); |
| ctx.arc(300, 100, 90, 0, Math.PI*1.66); |
| ctx.closePath(); |
| ctx.strokeStyle = 'yellow'; |
| ctx.lineWidth = 5; |
| ctx.stroke(); |
| ctx.save(); |
| ctx.clip(); |
| |
| const lgradient = ctx.createLinearGradient(200, 20, 420, 40); |
| |
| lgradient.addColorStop(0, 'green'); |
| lgradient.addColorStop(.5, 'cyan'); |
| lgradient.addColorStop(1, 'orange'); |
| |
| ctx.fillStyle = lgradient; |
| |
| ctx.fillRect(200, 30, 200, 300); |
| |
| ctx.restore(); |
| ctx.fillRect(550, 550, 40, 40); |
| }); |
| })); |
| }); |
| |
| it('can draw png images', function(done) { |
| let skImageData = null; |
| let htmlImage = null; |
| let skPromise = fetch('/assets/mandrill_512.png') |
| .then((response) => response.arrayBuffer()) |
| .then((buffer) => { |
| skImageData = buffer; |
| |
| }); |
| let realPromise = fetch('/assets/mandrill_512.png') |
| .then((response) => response.blob()) |
| .then((blob) => createImageBitmap(blob)) |
| .then((bitmap) => { |
| htmlImage = bitmap; |
| }); |
| LoadCanvasKit.then(catchException(done, () => { |
| Promise.all([realPromise, skPromise]).then(() => { |
| multipleCanvasTest('draw_image', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| let img = htmlImage; |
| if (canvas._config == 'software_canvas') { |
| img = canvas.decodeImage(skImageData); |
| } |
| ctx.drawImage(img, 30, -200); |
| |
| ctx.globalAlpha = 0.7 |
| ctx.rotate(.1); |
| ctx.imageSmoothingQuality = 'medium'; |
| ctx.drawImage(img, 200, 350, 150, 100); |
| ctx.rotate(-.2); |
| ctx.imageSmoothingEnabled = false; |
| ctx.drawImage(img, 100, 150, 400, 350, 10, 400, 150, 100); |
| }); |
| }); |
| })); |
| }); |
| |
| it('can get and put pixels', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| multipleCanvasTest('get_put_imagedata', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| // Make a gradient so we see if the pixels copying worked |
| let grad = ctx.createLinearGradient(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT); |
| grad.addColorStop(0, 'yellow'); |
| grad.addColorStop(1, 'red'); |
| ctx.fillStyle = grad; |
| ctx.fillRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT); |
| |
| let iData = ctx.getImageData(400, 100, 200, 150); |
| expect(iData.width).toBe(200); |
| expect(iData.height).toBe(150); |
| expect(iData.data.byteLength).toBe(200*150*4); |
| ctx.putImageData(iData, 10, 10); |
| ctx.putImageData(iData, 350, 350, 100, 75, 45, 40); |
| ctx.strokeRect(350, 350, 200, 150); |
| |
| let box = ctx.createImageData(20, 40); |
| ctx.putImageData(box, 10, 300); |
| let biggerBox = ctx.createImageData(iData); |
| ctx.putImageData(biggerBox, 10, 350); |
| expect(biggerBox.width).toBe(iData.width); |
| expect(biggerBox.height).toBe(iData.height); |
| }); |
| })); |
| }); |
| |
| it('can make patterns', function(done) { |
| let skImageData = null; |
| let htmlImage = null; |
| let skPromise = fetch('/assets/mandrill_512.png') |
| .then((response) => response.arrayBuffer()) |
| .then((buffer) => { |
| skImageData = buffer; |
| |
| }); |
| let realPromise = fetch('/assets/mandrill_512.png') |
| .then((response) => response.blob()) |
| .then((blob) => createImageBitmap(blob)) |
| .then((bitmap) => { |
| htmlImage = bitmap; |
| }); |
| LoadCanvasKit.then(catchException(done, () => { |
| Promise.all([realPromise, skPromise]).then(() => { |
| multipleCanvasTest('draw_patterns', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| let img = htmlImage; |
| if (canvas._config == 'software_canvas') { |
| img = canvas.decodeImage(skImageData); |
| } |
| ctx.fillStyle = '#EEE'; |
| ctx.fillRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT); |
| ctx.lineWidth = 20; |
| ctx.scale(0.2, 0.4); |
| |
| let pattern = ctx.createPattern(img, 'repeat'); |
| ctx.fillStyle = pattern; |
| ctx.fillRect(0, 0, 1500, 750); |
| |
| pattern = ctx.createPattern(img, 'repeat-x'); |
| ctx.fillStyle = pattern; |
| ctx.fillRect(1500, 0, 3000, 750); |
| |
| ctx.globalAlpha = 0.7 |
| pattern = ctx.createPattern(img, 'repeat-y'); |
| ctx.fillStyle = pattern; |
| ctx.fillRect(0, 750, 1500, 1500); |
| ctx.strokeRect(0, 750, 1500, 1500); |
| |
| pattern = ctx.createPattern(img, 'no-repeat'); |
| ctx.fillStyle = pattern; |
| pattern.setTransform({a: 1, b: -.1, c:.1, d: 0.5, e: 1800, f:800}); |
| ctx.fillRect(0, 0, 3000, 1500); |
| }); |
| }); |
| })); |
| }); |
| |
| it('can get and put pixels', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| function drawPoint(ctx, x, y, color) { |
| ctx.fillStyle = color; |
| ctx.fillRect(x, y, 1, 1); |
| } |
| const IN = 'purple'; |
| const OUT = 'orange'; |
| const SCALE = 8; |
| |
| // Check to see if these points are in or out on each of the |
| // test configurations. |
| const pts = [[3, 3], [4, 4], [5, 5], [10, 10], [8, 10], [6, 10], |
| [6.5, 9], [15, 10], [17, 10], [17, 11], [24, 24], |
| [25, 25], [26, 26], [27, 27]]; |
| const tests = [ |
| { |
| xOffset: 0, |
| yOffset: 0, |
| fillType: 'nonzero', |
| strokeWidth: 0, |
| testFn: (ctx, x, y) => ctx.isPointInPath(x * SCALE, y * SCALE, 'nonzero'), |
| }, |
| { |
| xOffset: 30, |
| yOffset: 0, |
| fillType: 'evenodd', |
| strokeWidth: 0, |
| testFn: (ctx, x, y) => ctx.isPointInPath(x * SCALE, y * SCALE, 'evenodd'), |
| }, |
| { |
| xOffset: 0, |
| yOffset: 30, |
| fillType: null, |
| strokeWidth: 1, |
| testFn: (ctx, x, y) => ctx.isPointInStroke(x * SCALE, y * SCALE), |
| }, |
| { |
| xOffset: 30, |
| yOffset: 30, |
| fillType: null, |
| strokeWidth: 2, |
| testFn: (ctx, x, y) => ctx.isPointInStroke(x * SCALE, y * SCALE), |
| }, |
| ]; |
| multipleCanvasTest('points_in_path_stroke', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| ctx.font = '20px Noto Mono'; |
| // Draw some visual aids |
| ctx.fillText('path-nonzero', 60, 30); |
| ctx.fillText('path-evenodd', 300, 30); |
| ctx.fillText('stroke-1px-wide', 60, 260); |
| ctx.fillText('stroke-2px-wide', 300, 260); |
| ctx.fillText('purple is IN, orange is OUT', 20, 560); |
| |
| // Scale up to make single pixels easier to see |
| ctx.scale(SCALE, SCALE); |
| for (let test of tests) { |
| ctx.beginPath(); |
| let xOffset = test.xOffset; |
| let yOffset = test.yOffset; |
| |
| ctx.fillStyle = '#AAA'; |
| ctx.lineWidth = test.strokeWidth; |
| ctx.rect(5+xOffset, 5+yOffset, 20, 20); |
| ctx.arc(15+xOffset, 15+yOffset, 8, 0, Math.PI*2, false); |
| if (test.fillType) { |
| ctx.fill(test.fillType); |
| } else { |
| ctx.stroke(); |
| } |
| |
| for (let pt of pts) { |
| let [x, y] = pt; |
| x += xOffset; |
| y += yOffset; |
| // naively apply transform when querying because the points queried |
| // ignore the CTM. |
| if (test.testFn(ctx, x, y)) { |
| drawPoint(ctx, x, y, IN); |
| } else { |
| drawPoint(ctx, x, y, OUT); |
| } |
| } |
| } |
| }); |
| })); |
| }); |
| |
| it('can load custom fonts', function(done) { |
| let realFontLoaded = new FontFace('BungeeNonSystem', 'url(/assets/Bungee-Regular.ttf)', { |
| 'family': 'BungeeNonSystem', //Make sure the canvas does not use the system font |
| 'style': 'normal', |
| 'weight': '400', |
| }).load().then((font) => { |
| document.fonts.add(font); |
| }); |
| |
| let fontBuffer = null; |
| |
| let skFontLoaded = fetch('/assets/Bungee-Regular.ttf').then( |
| (response) => response.arrayBuffer()).then( |
| (buffer) => { |
| fontBuffer = buffer; |
| }); |
| |
| LoadCanvasKit.then(catchException(done, () => { |
| Promise.all([realFontLoaded, skFontLoaded]).then(() => { |
| multipleCanvasTest('custom_font', done, (canvas) => { |
| if (canvas.loadFont) { |
| canvas.loadFont(fontBuffer, { |
| 'family': 'BungeeNonSystem', |
| 'style': 'normal', |
| 'weight': '400', |
| }); |
| } |
| let ctx = canvas.getContext('2d'); |
| |
| ctx.font = '20px monospace'; |
| ctx.fillText('20 px monospace', 10, 30); |
| |
| ctx.font = '2.0em BungeeNonSystem'; |
| ctx.fillText('2.0em Bungee filled', 10, 80); |
| ctx.strokeText('2.0em Bungee stroked', 10, 130); |
| |
| ctx.font = '40pt monospace'; |
| ctx.strokeText('40pt monospace', 10, 200); |
| |
| // bold wasn't defined, so should fallback to just the 400 weight |
| ctx.font = 'bold 45px BungeeNonSystem'; |
| ctx.fillText('45px Bungee filled', 10, 260); |
| }); |
| }); |
| })); |
| }); |
| it('can read default properties', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const skcanvas = CanvasKit.MakeCanvas(CANVAS_WIDTH, CANVAS_HEIGHT); |
| const realCanvas = document.getElementById('test'); |
| realCanvas.width = CANVAS_WIDTH; |
| realCanvas.height = CANVAS_HEIGHT; |
| |
| const skcontext = skcanvas.getContext('2d'); |
| const realContext = realCanvas.getContext('2d'); |
| // The skia canvas only comes with a monospace font by default |
| // Set the html canvas to be monospace too. |
| realContext.font = '10px monospace'; |
| |
| const toTest = ['font', 'lineWidth', 'strokeStyle', 'lineCap', |
| 'lineJoin', 'miterLimit', 'shadowOffsetY', |
| 'shadowBlur', 'shadowColor', 'shadowOffsetX', |
| 'globalAlpha', 'globalCompositeOperation', |
| 'lineDashOffset', 'imageSmoothingEnabled', |
| 'imageFilterQuality']; |
| |
| // Compare all the default values of the properties of skcanvas |
| // to the default values on the properties of a real canvas. |
| for(let attr of toTest) { |
| expect(skcontext[attr]).toBe(realContext[attr], attr); |
| } |
| |
| skcanvas.dispose(); |
| done(); |
| })); |
| }); |
| }); // end describe('CanvasContext2D API') |
| |
| describe('Path2D API', function() { |
| it('supports all the line types', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| multipleCanvasTest('path2d_line_drawing_operations', done, (canvas) => { |
| let ctx = canvas.getContext('2d'); |
| let clock; |
| let path; |
| if (canvas.makePath2D) { |
| clock = canvas.makePath2D('M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zm.5-13H11v6l5.25 3.15.75-1.23-4.5-2.67z'); |
| path = canvas.makePath2D(); |
| } else { |
| clock = new Path2D('M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zm.5-13H11v6l5.25 3.15.75-1.23-4.5-2.67z') |
| path = new Path2D(); |
| } |
| 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, 25); |
| |
| 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); |
| |
| path.moveTo(150, 5); |
| path.ellipse(130, 25, 30, 10, -1*Math.PI/8, Math.PI/6, 1.5*Math.PI) |
| |
| ctx.lineWidth = 2; |
| ctx.scale(3.0, 3.0); |
| ctx.stroke(path); |
| ctx.stroke(clock); |
| }); |
| })); |
| }); |
| }); // end describe('Path2D API') |
| |
| |
| }); |
