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| (Empty) |
| 1 description("Ensure correct behavior of canvas with fillPath using a pattern fil
lStyle and a shadow"); | |
| 2 | |
| 3 function print(message, color) | |
| 4 { | |
| 5 var paragraph = document.createElement("div"); | |
| 6 paragraph.appendChild(document.createTextNode(message)); | |
| 7 paragraph.style.fontFamily = "monospace"; | |
| 8 if (color) | |
| 9 paragraph.style.color = color; | |
| 10 document.getElementById("console").appendChild(paragraph); | |
| 11 } | |
| 12 | |
| 13 function shouldBeAround(a, b) | |
| 14 { | |
| 15 var evalA; | |
| 16 try { | |
| 17 evalA = eval(a); | |
| 18 } catch(e) { | |
| 19 evalA = e; | |
| 20 } | |
| 21 | |
| 22 if (Math.abs(evalA - b) < 15) | |
| 23 print("PASS " + a + " is around " + b , "green") | |
| 24 else | |
| 25 print("FAIL " + a + " is not around " + b + " (actual: " + evalA + ")",
"red"); | |
| 26 } | |
| 27 | |
| 28 var aCanvas = document.createElement('canvas'); | |
| 29 aCanvas.setAttribute('width', '50'); | |
| 30 aCanvas.setAttribute('height', '50'); | |
| 31 | |
| 32 var aCtx = aCanvas.getContext('2d'); | |
| 33 aCtx.fillStyle = 'rgba(0, 0, 255, 0.5)'; | |
| 34 aCtx.fillRect(0, 0, 50, 50); | |
| 35 | |
| 36 var pattern = aCtx.createPattern(aCanvas, 'repeat'); | |
| 37 | |
| 38 var canvas = document.createElement('canvas'); | |
| 39 document.body.appendChild(canvas); | |
| 40 canvas.setAttribute('width', '600'); | |
| 41 canvas.setAttribute('height', '1100'); | |
| 42 var ctx = canvas.getContext('2d'); | |
| 43 | |
| 44 ctx.save(); | |
| 45 ctx.fillStyle = pattern; | |
| 46 ctx.shadowColor = 'rgba(255, 0, 0, 0.5)'; | |
| 47 ctx.shadowOffsetX = 250; | |
| 48 | |
| 49 function fillShape(x, y) { | |
| 50 ctx.beginPath(); | |
| 51 ctx.arc(x, y, 100, 0, Math.PI*2, true); | |
| 52 ctx.arc(x, y, 50, 0, Math.PI*2, false); | |
| 53 ctx.fill(); | |
| 54 } | |
| 55 | |
| 56 // Alpha shadow. | |
| 57 ctx.shadowBlur = 0; | |
| 58 fillShape(150, 150); | |
| 59 | |
| 60 // Blurry shadow. | |
| 61 ctx.shadowBlur = 10; | |
| 62 fillShape(150, 400); | |
| 63 | |
| 64 ctx.rotate(Math.PI/2); | |
| 65 | |
| 66 // Rotated alpha shadow. | |
| 67 ctx.shadowBlur = 0; | |
| 68 fillShape(650, -150); | |
| 69 | |
| 70 // Rotated blurry shadow. | |
| 71 ctx.shadowBlur = 10; | |
| 72 fillShape(900, -150); | |
| 73 | |
| 74 ctx.restore(); | |
| 75 | |
| 76 var imageData, data; | |
| 77 ctx.fillStyle = 'black'; | |
| 78 | |
| 79 function test(alphaTestFunction, x, y, r, g, b, a) { | |
| 80 // Get pixel. | |
| 81 imageData = ctx.getImageData(x, y, 1, 1); | |
| 82 data = imageData.data; | |
| 83 // Test pixel color components. | |
| 84 shouldBe('data[0]', r+''); | |
| 85 shouldBe('data[1]', g+''); | |
| 86 shouldBe('data[2]', b+''); | |
| 87 alphaTestFunction('data[3]', a+''); | |
| 88 // Plot test point. | |
| 89 ctx.fillRect(x, y, 3, 3); | |
| 90 } | |
| 91 | |
| 92 print('Verifying alpha shadow...'); | |
| 93 test(shouldBe, 400, 150, 0, 0, 0, 0); | |
| 94 test(shouldBeAround, 400, 75, 255, 0, 0, 64); | |
| 95 test(shouldBeAround, 400, 225, 255, 0, 0, 64); | |
| 96 test(shouldBeAround, 325, 150, 255, 0, 0, 64); | |
| 97 test(shouldBeAround, 475, 150, 255, 0, 0, 64); | |
| 98 | |
| 99 print(' '); | |
| 100 print('Verifying blurry shadow...'); | |
| 101 test(shouldBe, 400, 400, 0, 0, 0, 0); | |
| 102 test(shouldBeAround, 400, 300, 255, 0, 0, 31); | |
| 103 test(shouldBeAround, 400, 500, 255, 0, 0, 31); | |
| 104 test(shouldBeAround, 300, 400, 255, 0, 0, 31); | |
| 105 test(shouldBeAround, 500, 400, 255, 0, 0, 31); | |
| 106 | |
| 107 print(' '); | |
| 108 print('Verifying rotated alpha shadow...'); | |
| 109 test(shouldBe, 400, 650, 0, 0, 0, 0); | |
| 110 test(shouldBeAround, 400, 575, 255, 0, 0, 64); | |
| 111 test(shouldBeAround, 400, 725, 255, 0, 0, 64); | |
| 112 test(shouldBeAround, 325, 650, 255, 0, 0, 64); | |
| 113 test(shouldBeAround, 475, 650, 255, 0, 0, 64); | |
| 114 | |
| 115 print(' '); | |
| 116 print('Verifying rotated blurry shadow...'); | |
| 117 test(shouldBe, 400, 900, 0, 0, 0, 0); | |
| 118 test(shouldBeAround, 400, 800, 255, 0, 0, 31); | |
| 119 test(shouldBeAround, 400, 1000, 255, 0, 0, 31); | |
| 120 test(shouldBeAround, 300, 900, 255, 0, 0, 31); | |
| 121 test(shouldBeAround, 500, 900, 255, 0, 0, 31); | |
| 122 | |
| 123 print(' '); | |
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