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| (Empty) |
| 1 description("Ensure correct behavior of canvas with path stroke + shadow after s
caling. A blue and red checkered pattern should be displayed."); | |
| 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) < 20) | |
| 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 canvas = document.createElement('canvas'); | |
| 29 document.body.appendChild(canvas); | |
| 30 canvas.setAttribute('width', '600'); | |
| 31 canvas.setAttribute('height', '600'); | |
| 32 var ctx = canvas.getContext('2d'); | |
| 33 | |
| 34 ctx.scale(2, 2); | |
| 35 ctx.shadowOffsetX = 100; | |
| 36 ctx.shadowOffsetY = 100; | |
| 37 ctx.strokeStyle = 'rgba(0, 0, 255, 1)'; | |
| 38 ctx.lineWidth = 5; | |
| 39 | |
| 40 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; | |
| 41 ctx.beginPath(); | |
| 42 ctx.moveTo(50, 50); | |
| 43 ctx.lineTo(100, 50); | |
| 44 ctx.lineTo(100, 100); | |
| 45 ctx.lineTo(50, 100); | |
| 46 ctx.lineTo(50, 50); | |
| 47 ctx.stroke(); | |
| 48 | |
| 49 ctx.shadowColor = 'rgba(255, 0, 0, 0.3)'; | |
| 50 ctx.beginPath(); | |
| 51 ctx.moveTo(50, 150); | |
| 52 ctx.lineTo(100, 150); | |
| 53 ctx.lineTo(100, 200); | |
| 54 ctx.lineTo(50, 200); | |
| 55 ctx.lineTo(50, 150); | |
| 56 ctx.stroke(); | |
| 57 | |
| 58 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; | |
| 59 ctx.shadowBlur = 10; | |
| 60 ctx.beginPath(); | |
| 61 ctx.moveTo(150, 50); | |
| 62 ctx.lineTo(200, 50); | |
| 63 ctx.lineTo(200, 100); | |
| 64 ctx.lineTo(150, 100); | |
| 65 ctx.lineTo(150, 50); | |
| 66 ctx.stroke(); | |
| 67 | |
| 68 ctx.shadowColor = 'rgba(255, 0, 0, 0.6)'; | |
| 69 ctx.beginPath(); | |
| 70 ctx.moveTo(150, 150); | |
| 71 ctx.lineTo(200, 150); | |
| 72 ctx.lineTo(200, 200); | |
| 73 ctx.lineTo(150, 200); | |
| 74 ctx.lineTo(150, 150); | |
| 75 ctx.stroke(); | |
| 76 | |
| 77 var d; // imageData.data | |
| 78 | |
| 79 // Verify solid shadow. | |
| 80 d = ctx.getImageData(250, 200, 1, 1).data; | |
| 81 shouldBe('d[0]', '255'); | |
| 82 shouldBe('d[1]', '0'); | |
| 83 shouldBe('d[2]', '0'); | |
| 84 shouldBe('d[3]', '255'); | |
| 85 | |
| 86 d = ctx.getImageData(300, 290, 1, 1).data; | |
| 87 shouldBe('d[0]', '255'); | |
| 88 shouldBe('d[1]', '0'); | |
| 89 shouldBe('d[2]', '0'); | |
| 90 shouldBe('d[3]', '255'); | |
| 91 | |
| 92 d = ctx.getImageData(200, 250, 1, 1).data; | |
| 93 shouldBe('d[0]', '255'); | |
| 94 shouldBe('d[1]', '0'); | |
| 95 shouldBe('d[2]', '0'); | |
| 96 shouldBe('d[3]', '255'); | |
| 97 | |
| 98 // Verify solid alpha shadow. | |
| 99 d = ctx.getImageData(201, 405, 1, 1).data; | |
| 100 shouldBe('d[0]', '255'); | |
| 101 shouldBe('d[1]', '0'); | |
| 102 shouldBe('d[2]', '0'); | |
| 103 shouldBeAround('d[3]', '76'); | |
| 104 | |
| 105 d = ctx.getImageData(201, 500, 1, 1).data; | |
| 106 shouldBe('d[0]', '255'); | |
| 107 shouldBe('d[1]', '0'); | |
| 108 shouldBe('d[2]', '0'); | |
| 109 shouldBeAround('d[3]', '76'); | |
| 110 | |
| 111 d = ctx.getImageData(300, 499, 1, 1).data; | |
| 112 shouldBe('d[0]', '255'); | |
| 113 shouldBe('d[1]', '0'); | |
| 114 shouldBe('d[2]', '0'); | |
| 115 shouldBeAround('d[3]', '76'); | |
| 116 | |
| 117 // Verify blurry shadow. | |
| 118 d = ctx.getImageData(398, 210, 1, 1).data; | |
| 119 shouldBe('d[0]', '255'); | |
| 120 shouldBe('d[1]', '0'); | |
| 121 shouldBe('d[2]', '0'); | |
| 122 shouldBeAround('d[3]', '200'); | |
| 123 | |
| 124 d = ctx.getImageData(508, 250, 1, 1).data; | |
| 125 shouldBe('d[0]', '255'); | |
| 126 shouldBe('d[1]', '0'); | |
| 127 shouldBe('d[2]', '0'); | |
| 128 shouldBeAround('d[3]', '49'); | |
| 129 | |
| 130 d = ctx.getImageData(450, 198, 1, 1).data; | |
| 131 shouldBe('d[0]', '255'); | |
| 132 shouldBe('d[1]', '0'); | |
| 133 shouldBe('d[2]', '0'); | |
| 134 shouldBeAround('d[3]', '199'); | |
| 135 | |
| 136 // Verify blurry alpha shadow. | |
| 137 d = ctx.getImageData(505, 450, 1, 1).data; | |
| 138 shouldBe('d[0]', '255'); | |
| 139 shouldBe('d[1]', '0'); | |
| 140 shouldBe('d[2]', '0'); | |
| 141 shouldBeAround('d[3]', '70'); | |
| 142 | |
| 143 d = ctx.getImageData(505, 450, 1, 1).data; | |
| 144 shouldBe('d[0]', '255'); | |
| 145 shouldBe('d[1]', '0'); | |
| 146 shouldBe('d[2]', '0'); | |
| 147 shouldBeAround('d[3]', '70'); | |
| 148 | |
| 149 d = ctx.getImageData(450, 405, 1, 1).data; | |
| 150 shouldBe('d[0]', '255'); | |
| 151 shouldBe('d[1]', '0'); | |
| 152 shouldBe('d[2]', '0'); | |
| 153 shouldBeAround('d[3]', '69'); | |
| OLD | NEW |