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

Issue 2690183006: Use testharness.js instead of js-test.js in LayoutTests/fast/canvas tests. (Closed)
Patch Set: Addressing comments Created 3 years, 10 months ago
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1 description("Ensure correct behavior of canvas with strokeRect using a semi-tran sparent solid strokeStyle 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 ctx.save();
35 ctx.strokeStyle = 'rgba(0, 0, 255, 0.5)';
36 ctx.shadowColor = 'rgba(255, 0, 0, 0.5)';
37 ctx.shadowOffsetX = 250;
38 ctx.lineWidth = 25;
39
40 var side = 200;
41
42 // Alpha shadow.
43 ctx.shadowBlur = 0;
44 ctx.strokeRect(50, 50, side, side);
45
46 // Blurry shadow.
47 ctx.shadowBlur = 10;
48 ctx.strokeRect(50, 300, side, side);
49
50 ctx.rotate(Math.PI / 2);
51
52 // Rotated alpha shadow.
53 ctx.shadowBlur = 0;
54 ctx.strokeRect(550, -250, side, side);
55
56 // Rotated blurry shadow.
57 ctx.shadowBlur = 10;
58 ctx.strokeRect(800, -250, side, side);
59
60 ctx.restore();
61
62 var imageData, data;
63 ctx.fillStyle = 'black';
64
65 function test(alphaTestFunction, x, y, r, g, b, a) {
66 // Get pixel.
67 imageData = ctx.getImageData(x, y, 1, 1);
68 data = imageData.data;
69 // Test pixel color components.
70 shouldBe('data[0]', r+'');
71 shouldBe('data[1]', g+'');
72 shouldBe('data[2]', b+'');
73 alphaTestFunction('data[3]', a+'');
74 // Plot test point.
75 ctx.fillRect(x, y, 3, 3);
76 }
77
78 print('Verifying alpha shadow...');
79 test(shouldBe, 400, 150, 0, 0, 0, 0);
80
81 test(shouldBe, 400, 75, 0, 0, 0, 0);
82 test(shouldBe, 400, 225, 0, 0, 0, 0);
83 test(shouldBe, 325, 150, 0, 0, 0, 0);
84 test(shouldBe, 475, 150, 0, 0, 0, 0);
85
86 test(shouldBeAround, 400, 50, 255, 0, 0, 64);
87 test(shouldBeAround, 500, 150, 255, 0, 0, 64);
88 test(shouldBeAround, 400, 250, 255, 0, 0, 64);
89 test(shouldBeAround, 300, 150, 255, 0, 0, 64);
90
91 test(shouldBe, 400, 25, 0, 0, 0, 0);
92 test(shouldBe, 525, 150, 0, 0, 0, 0);
93 test(shouldBe, 400, 275, 0, 0, 0, 0);
94 test(shouldBe, 275, 150, 0, 0, 0, 0);
95
96 print(' ');
97 print('Verifying blurry shadow...');
98 test(shouldBe, 400, 400, 0, 0, 0, 0);
99
100 test(shouldBe, 400, 325, 0, 0, 0, 0);
101 test(shouldBe, 475, 400, 0, 0, 0, 0);
102 test(shouldBe, 400, 475, 0, 0, 0, 0);
103 test(shouldBe, 325, 400, 0, 0, 0, 0);
104
105 test(shouldBeAround, 400, 300, 255, 0, 0, 64);
106 test(shouldBeAround, 400, 500, 255, 0, 0, 64);
107 test(shouldBeAround, 300, 400, 255, 0, 0, 64);
108 test(shouldBeAround, 500, 400, 255, 0, 0, 64);
109
110 test(shouldBe, 525, 400, 0, 0, 0, 0);
111 test(shouldBe, 275, 400, 0, 0, 0, 0);
112
113 print(' ');
114 print('Verifying rotated alpha shadow...');
115 test(shouldBe, 400, 650, 0, 0, 0, 0);
116
117 test(shouldBe, 400, 575, 0, 0, 0, 0);
118 test(shouldBe, 400, 725, 0, 0, 0, 0);
119 test(shouldBe, 325, 650, 0, 0, 0, 0);
120 test(shouldBe, 475, 650, 0, 0, 0, 0);
121
122 test(shouldBeAround, 400, 550, 255, 0, 0, 64);
123 test(shouldBeAround, 500, 650, 255, 0, 0, 64);
124 test(shouldBeAround, 400, 750, 255, 0, 0, 64);
125 test(shouldBeAround, 300, 650, 255, 0, 0, 64);
126
127 test(shouldBe, 400, 525, 0, 0, 0, 0);
128 test(shouldBe, 525, 650, 0, 0, 0, 0);
129 test(shouldBe, 400, 775, 0, 0, 0, 0);
130 test(shouldBe, 275, 650, 0, 0, 0, 0);
131
132 print(' ');
133 print('Verifying rotated blurry shadow...');
134 test(shouldBe, 400, 900, 0, 0, 0, 0);
135
136 test(shouldBe, 400, 825, 0, 0, 0, 0);
137 test(shouldBe, 475, 900, 0, 0, 0, 0);
138 test(shouldBe, 400, 975, 0, 0, 0, 0);
139 test(shouldBe, 325, 900, 0, 0, 0, 0);
140
141 test(shouldBeAround, 400, 800, 255, 0, 0, 64);
142 test(shouldBeAround, 400, 1000, 255, 0, 0, 64);
143 test(shouldBeAround, 300, 900, 255, 0, 0, 64);
144 test(shouldBeAround, 500, 900, 255, 0, 0, 64);
145
146 test(shouldBe, 525, 900, 0, 0, 0, 0);
147 test(shouldBe, 275, 900, 0, 0, 0, 0);
148 test(shouldBe, 400, 1025, 0, 0, 0, 0);
149
150 print(' ');
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