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Side by Side Diff: third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-fillPath-gradient-shadow.js

Issue 2678493002: Use testharness.js instead of js-test.js in LayoutTests/fast/canvas tests. (Closed)
Patch Set: Created 3 years, 10 months ago
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1 description("Ensure correct behavior of canvas with fillPath using a gradient fi llStyle 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 canvas = document.createElement('canvas');
29 document.body.appendChild(canvas);
30 canvas.setAttribute('width', '600');
31 canvas.setAttribute('height', '1100');
32 var ctx = canvas.getContext('2d');
33
34 var gradient = ctx.createLinearGradient(0, 0, 300, 0);
35 gradient.addColorStop(0, 'rgba(0, 0, 255, 0.5)');
36 gradient.addColorStop(1, 'rgba(0, 0, 255, 0.5)');
37
38 ctx.save();
39 ctx.fillStyle = gradient;
40 ctx.shadowColor = 'rgba(255, 0, 0, 0.5)';
41 ctx.shadowOffsetX = 250;
42
43 function fillShape(x, y) {
44 ctx.beginPath();
45 ctx.arc(x, y, 100, 0, Math.PI*2, true);
46 ctx.arc(x, y, 50, 0, Math.PI*2, false);
47 ctx.fill();
48 }
49
50 // Alpha shadow.
51 ctx.shadowBlur = 0;
52 fillShape(150, 150);
53
54 // Blurry shadow.
55 ctx.shadowBlur = 10;
56 fillShape(150, 400);
57
58 ctx.rotate(Math.PI/2);
59
60 // Rotated alpha shadow.
61 ctx.shadowBlur = 0;
62 fillShape(650, -150);
63
64 // Rotated blurry shadow.
65 ctx.shadowBlur = 10;
66 fillShape(900, -150);
67
68 ctx.restore();
69
70 var imageData, data;
71 ctx.fillStyle = 'black';
72
73 function test(alphaTestFunction, x, y, r, g, b, a) {
74 // Get pixel.
75 imageData = ctx.getImageData(x, y, 1, 1);
76 data = imageData.data;
77 // Test pixel color components.
78 shouldBe('data[0]', r+'');
79 shouldBe('data[1]', g+'');
80 shouldBe('data[2]', b+'');
81 alphaTestFunction('data[3]', a+'');
82 // Plot test point.
83 ctx.fillRect(x, y, 3, 3);
84 }
85
86 print('Verifying alpha shadow...');
87 test(shouldBe, 400, 150, 0, 0, 0, 0);
88 test(shouldBeAround, 400, 75, 255, 0, 0, 64);
89 test(shouldBeAround, 400, 225, 255, 0, 0, 64);
90 test(shouldBeAround, 325, 150, 255, 0, 0, 64);
91 test(shouldBeAround, 475, 150, 255, 0, 0, 64);
92
93 print(' ');
94 print('Verifying blurry shadow...');
95 test(shouldBe, 400, 400, 0, 0, 0, 0);
96 test(shouldBeAround, 400, 300, 255, 0, 0, 31);
97 test(shouldBeAround, 400, 500, 255, 0, 0, 31);
98 test(shouldBeAround, 300, 400, 255, 0, 0, 31);
99 test(shouldBeAround, 500, 400, 255, 0, 0, 31);
100
101 print(' ');
102 print('Verifying rotated alpha shadow...');
103 test(shouldBe, 400, 650, 0, 0, 0, 0);
104 test(shouldBeAround, 400, 575, 255, 0, 0, 64);
105 test(shouldBeAround, 400, 725, 255, 0, 0, 64);
106 test(shouldBeAround, 325, 650, 255, 0, 0, 64);
107 test(shouldBeAround, 475, 650, 255, 0, 0, 64);
108
109 print(' ');
110 print('Verifying rotated blurry shadow...');
111 test(shouldBe, 400, 900, 0, 0, 0, 0);
112 test(shouldBeAround, 400, 800, 255, 0, 0, 31);
113 test(shouldBeAround, 400, 1000, 255, 0, 0, 31);
114 test(shouldBeAround, 300, 900, 255, 0, 0, 31);
115 test(shouldBeAround, 500, 900, 255, 0, 0, 31);
116
117 print(' ');
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