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| 1 description("Test ImageData constructor"); |
| 2 |
| 3 function setRGBA(imageData, i, rgba) { |
| 4 var s = i * 4; |
| 5 imageData[s] = rgba[0]; |
| 6 imageData[s + 1] = rgba[1]; |
| 7 imageData[s + 2] = rgba[2]; |
| 8 imageData[s + 3] = rgba[3]; |
| 9 } |
| 10 |
| 11 function getRGBA(imageData, i) { |
| 12 var result = []; |
| 13 var s = i * 4; |
| 14 for (var j = 0; j < 4; j++) { |
| 15 result[j] = imageData[s + j]; |
| 16 } |
| 17 return result; |
| 18 } |
| 19 |
| 20 shouldBeDefined("ImageData"); |
| 21 shouldBe("ImageData.length", "2"); |
| 22 |
| 23 imageData = new ImageData(100, 50); |
| 24 |
| 25 shouldBeNonNull("imageData"); |
| 26 shouldBeNonNull("imageData.data"); |
| 27 shouldBe("imageData.width", "100"); |
| 28 shouldBe("imageData.height", "50"); |
| 29 shouldBe("getRGBA(imageData.data, 4)", "[0, 0, 0, 0]"); |
| 30 |
| 31 var testColor = [0, 255, 255, 128]; |
| 32 setRGBA(imageData.data, 4, testColor); |
| 33 shouldBe("getRGBA(imageData.data, 4)", "testColor"); |
| 34 |
| 35 shouldThrow("new ImageData(10)"); |
| 36 shouldThrow("new ImageData(0, 10)"); |
| 37 shouldThrow("new ImageData(10, 0)"); |
| 38 shouldThrow("new ImageData('width', 'height')"); |
| 39 shouldThrow("new ImageData(1 << 31, 1 << 31)"); |
| 40 |
| 41 shouldThrow("new ImageData(new Uint8ClampedArray(0))"); |
| 42 shouldThrow("new ImageData(new Uint8Array(100), 25)"); |
| 43 shouldThrow("new ImageData(new Uint8ClampedArray(27), 2)"); |
| 44 shouldThrow("new ImageData(new Uint8ClampedArray(104), 14)"); |
| 45 shouldThrow("new ImageData(imageData.data, 0)"); |
| 46 shouldThrow("new ImageData(imageData.data, 13)"); |
| 47 shouldThrow("new ImageData(imageData.data, 1 << 31)"); |
| 48 shouldThrow("new ImageData(imageData.data, 'biggish')"); |
| 49 shouldThrow("new ImageData(imageData.data, 1 << 24, 1 << 31)"); |
| 50 |
| 51 imageDataFromData = new ImageData(imageData.data, 100); |
| 52 shouldBe("imageDataFromData.width", "100"); |
| 53 shouldBe("imageDataFromData.height", "50"); |
| 54 shouldBe("imageDataFromData.data", "imageData.data"); |
| 55 shouldBe("getRGBA(imageDataFromData.data, 10)", "getRGBA(imageData.data, 10)"); |
| 56 setRGBA(imageData.data, 10, testColor); |
| 57 shouldBe("getRGBA(imageDataFromData.data, 10)", "getRGBA(imageData.data, 10)"); |
| 58 |
| 59 var data = new Uint8ClampedArray(400); |
| 60 data[22] = 129; |
| 61 imageDataFromData = new ImageData(data, 20, 5); |
| 62 shouldBe("imageDataFromData.width", "20"); |
| 63 shouldBe("imageDataFromData.height", "5"); |
| 64 shouldBe("imageDataFromData.data", "data"); |
| 65 shouldBe("getRGBA(imageDataFromData.data, 2)", "getRGBA(data, 2)"); |
| 66 setRGBA(imageDataFromData.data, 2, testColor); |
| 67 shouldBe("getRGBA(imageDataFromData.data, 2)", "getRGBA(data, 2)"); |
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