| describe('CanvasKit\'s Path 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> |
| <canvas width=600 height=600 id=report></canvas>`; |
| }); |
| |
| afterEach(function() { |
| container.innerHTML = ''; |
| }); |
| |
| let notSerifFontBuffer = null; |
| // This font is known to support kerning |
| const notoSerifFontLoaded = fetch('/assets/NotoSerif-Regular.ttf').then( |
| (response) => response.arrayBuffer()).then( |
| (buffer) => { |
| notSerifFontBuffer = buffer; |
| }); |
| |
| it('can draw shaped and unshaped text', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| notoSerifFontLoaded.then(() => { |
| // This is taken from example.html |
| const surface = CanvasKit.MakeCanvasSurface('test'); |
| expect(surface).toBeTruthy('Could not make surface') |
| if (!surface) { |
| done(); |
| return; |
| } |
| const canvas = surface.getCanvas(); |
| const paint = new CanvasKit.SkPaint(); |
| |
| paint.setColor(CanvasKit.BLUE); |
| paint.setStyle(CanvasKit.PaintStyle.Stroke); |
| |
| const fontMgr = CanvasKit.SkFontMgr.RefDefault(); |
| const notoSerif = fontMgr.MakeTypefaceFromData(notSerifFontBuffer); |
| |
| const textPaint = new CanvasKit.SkPaint(); |
| // use the built-in monospace typeface. |
| const textFont = new CanvasKit.SkFont(notoSerif, 20); |
| |
| canvas.drawRect(CanvasKit.LTRBRect(30, 30, 200, 200), paint); |
| canvas.drawText('This text is not shaped, and overflows the boundry', |
| 35, 50, textPaint, textFont); |
| |
| const shapedText = new CanvasKit.ShapedText({ |
| font: textFont, |
| leftToRight: true, |
| text: 'This text *is* shaped, and wraps to the right width.', |
| width: 160, |
| }); |
| const textBoxX = 35; |
| const textBoxY = 55; |
| canvas.drawText(shapedText, textBoxX, textBoxY, textPaint); |
| const bounds = shapedText.getBounds(); |
| |
| bounds.fLeft += textBoxX; |
| bounds.fRight += textBoxX; |
| bounds.fTop += textBoxY; |
| bounds.fBottom += textBoxY |
| |
| canvas.drawRect(bounds, paint); |
| const SHAPE_TEST_TEXT = 'VAVAVAVAVAFIfi'; |
| const textFont2 = new CanvasKit.SkFont(notoSerif, 60); |
| const shapedText2 = new CanvasKit.ShapedText({ |
| font: textFont2, |
| leftToRight: true, |
| text: SHAPE_TEST_TEXT, |
| width: 600, |
| }); |
| |
| canvas.drawText('no kerning ↓', 10, 240, textPaint, textFont); |
| canvas.drawText(SHAPE_TEST_TEXT, 10, 300, textPaint, textFont2); |
| canvas.drawText(shapedText2, 10, 300, textPaint); |
| canvas.drawText('kerning ↑', 10, 390, textPaint, textFont); |
| |
| surface.flush(); |
| |
| paint.delete(); |
| notoSerif.delete(); |
| textPaint.delete(); |
| textFont.delete(); |
| shapedText.delete(); |
| textFont2.delete(); |
| shapedText2.delete(); |
| fontMgr.delete(); |
| reportSurface(surface, 'text_shaping', done); |
| }); |
| })); |
| }); |
| |
| it('can draw text following a path', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| const surface = CanvasKit.MakeCanvasSurface('test'); |
| expect(surface).toBeTruthy('Could not make surface') |
| if (!surface) { |
| done(); |
| return; |
| } |
| const canvas = surface.getCanvas(); |
| const paint = new CanvasKit.SkPaint(); |
| paint.setAntiAlias(true); |
| paint.setStyle(CanvasKit.PaintStyle.Stroke); |
| |
| const font = new CanvasKit.SkFont(null, 24); |
| const fontPaint = new CanvasKit.SkPaint(); |
| fontPaint.setAntiAlias(true); |
| fontPaint.setStyle(CanvasKit.PaintStyle.Fill); |
| |
| |
| const arc = new CanvasKit.SkPath(); |
| arc.arcTo(CanvasKit.LTRBRect(20, 40, 280, 300), -160, 140, true); |
| arc.lineTo(210, 140); |
| arc.arcTo(CanvasKit.LTRBRect(20, 0, 280, 260), 160, -140, true); |
| |
| // Only 1 dot should show up in the image, because we run out of path. |
| const str = 'This téxt should follow the curve across contours...'; |
| const textBlob = CanvasKit.SkTextBlob.MakeOnPath(str, arc, font); |
| |
| canvas.drawPath(arc, paint); |
| canvas.drawTextBlob(textBlob, 0, 0, fontPaint); |
| |
| surface.flush(); |
| |
| textBlob.delete(); |
| arc.delete(); |
| paint.delete(); |
| font.delete(); |
| fontPaint.delete(); |
| |
| reportSurface(surface, 'monospace_text_on_path', done); |
| })); |
| }); |
| |
| it('can draw text following a path with a non-serif font', function(done) { |
| LoadCanvasKit.then(catchException(done, () => { |
| notoSerifFontLoaded.then(() => { |
| const surface = CanvasKit.MakeCanvasSurface('test'); |
| expect(surface).toBeTruthy('Could not make surface') |
| if (!surface) { |
| done(); |
| return; |
| } |
| const fontMgr = CanvasKit.SkFontMgr.RefDefault(); |
| const notoSerif = fontMgr.MakeTypefaceFromData(notSerifFontBuffer); |
| |
| const canvas = surface.getCanvas(); |
| const paint = new CanvasKit.SkPaint(); |
| paint.setAntiAlias(true); |
| paint.setStyle(CanvasKit.PaintStyle.Stroke); |
| |
| const font = new CanvasKit.SkFont(notoSerif, 24); |
| const fontPaint = new CanvasKit.SkPaint(); |
| fontPaint.setAntiAlias(true); |
| fontPaint.setStyle(CanvasKit.PaintStyle.Fill); |
| |
| |
| const arc = new CanvasKit.SkPath(); |
| arc.arcTo(CanvasKit.LTRBRect(20, 40, 280, 300), -160, 140, true); |
| arc.lineTo(210, 140); |
| arc.arcTo(CanvasKit.LTRBRect(20, 0, 280, 260), 160, -140, true); |
| |
| const str = 'This téxt should follow the curve across contours...'; |
| const textBlob = CanvasKit.SkTextBlob.MakeOnPath(str, arc, font, 60.5); |
| |
| canvas.drawPath(arc, paint); |
| canvas.drawTextBlob(textBlob, 0, 0, fontPaint); |
| |
| surface.flush(); |
| |
| textBlob.delete(); |
| arc.delete(); |
| paint.delete(); |
| notoSerif.delete(); |
| font.delete(); |
| fontPaint.delete(); |
| fontMgr.delete(); |
| reportSurface(surface, 'serif_text_on_path', done); |
| }); |
| })); |
| }); |
| |
| // TODO more tests |
| }); |