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| 1 description("This test ensures that paths are correctly handled over save/restor
e boundaries"); | |
| 2 | |
| 3 function dataToArray(data) { | |
| 4 var result = new Array(data.length) | |
| 5 for (var i = 0; i < data.length; i++) | |
| 6 result[i] = data[i]; | |
| 7 return result; | |
| 8 } | |
| 9 | |
| 10 function getPixel(x, y) { | |
| 11 var data = context.getImageData(x,y,1,1); | |
| 12 if (!data) // getImageData failed, which should never happen | |
| 13 return [-1,-1,-1,-1]; | |
| 14 return dataToArray(data.data); | |
| 15 } | |
| 16 | |
| 17 function pixelShouldBe(x, y, colour) { | |
| 18 shouldBe("getPixel(" + [x, y] +")", "["+colour+"]"); | |
| 19 } | |
| 20 | |
| 21 var canvas = document.createElement("canvas"); | |
| 22 canvas.width = 100; | |
| 23 canvas.height = 100; | |
| 24 | |
| 25 var context = canvas.getContext("2d"); | |
| 26 context.fillStyle = "red"; | |
| 27 context.fillRect(0,0,100,100); | |
| 28 context.fillStyle = "green"; | |
| 29 | |
| 30 // Test translate | |
| 31 context.beginPath(); | |
| 32 context.save(); | |
| 33 context.translate(100, 100); | |
| 34 context.rect(-100, -100, 50, 50); | |
| 35 context.restore(); | |
| 36 context.fill(); | |
| 37 pixelShouldBe(25, 25, [0, 128, 0, 255]); | |
| 38 | |
| 39 // Test scale | |
| 40 context.beginPath(); | |
| 41 context.save(); | |
| 42 context.scale(2, 2); | |
| 43 context.rect(25, 0,25,25); | |
| 44 context.restore(); | |
| 45 context.fill(); | |
| 46 pixelShouldBe(75, 25, [0, 128, 0, 255]); | |
| 47 pixelShouldBe(75, 75, [255, 0, 0, 255]); | |
| 48 | |
| 49 // Test rotate | |
| 50 context.beginPath(); | |
| 51 context.save(); | |
| 52 context.rotate(90/180 * Math.PI); | |
| 53 context.rect(50, -50, 50, 50); | |
| 54 context.restore(); | |
| 55 context.fill(); | |
| 56 pixelShouldBe(25, 75, [0, 128, 0, 255]); | |
| 57 pixelShouldBe(75, 75, [255, 0, 0, 255]); | |
| 58 | |
| 59 // Test transform | |
| 60 context.beginPath(); | |
| 61 context.save(); | |
| 62 context.transform(1, 0, 0, 1, 50, 50); | |
| 63 context.rect(0, 0, 50, 50); | |
| 64 context.restore(); | |
| 65 context.fill(); | |
| 66 pixelShouldBe(75, 75, [0, 128, 0, 255]); | |
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