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1 description("Ensure correct behavior of canvas with path fill + shadow after sca
ling. 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', '1000'); | |
31 canvas.setAttribute('height', '1000'); | |
32 var ctx = canvas.getContext('2d'); | |
33 | |
34 ctx.scale(2, 2); | |
35 ctx.shadowOffsetX = 100; | |
36 ctx.shadowOffsetY = 100; | |
37 ctx.fillStyle = 'rgba(0, 0, 255, 1)'; | |
38 | |
39 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; | |
40 ctx.beginPath(); | |
41 ctx.moveTo(50, 50); | |
42 ctx.lineTo(100, 50); | |
43 ctx.lineTo(100, 100); | |
44 ctx.lineTo(50, 100); | |
45 ctx.fill(); | |
46 | |
47 ctx.shadowColor = 'rgba(255, 0, 0, 0.3)'; | |
48 ctx.beginPath(); | |
49 ctx.moveTo(50, 150); | |
50 ctx.lineTo(100, 150); | |
51 ctx.lineTo(100, 200); | |
52 ctx.lineTo(50, 200); | |
53 ctx.fill(); | |
54 | |
55 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; | |
56 ctx.shadowBlur = 10; | |
57 ctx.beginPath(); | |
58 ctx.moveTo(150, 50); | |
59 ctx.lineTo(200, 50); | |
60 ctx.lineTo(200, 100); | |
61 ctx.lineTo(150, 100); | |
62 ctx.fill(); | |
63 | |
64 ctx.shadowColor = 'rgba(255, 0, 0, 0.3)'; | |
65 ctx.beginPath(); | |
66 ctx.moveTo(150, 150); | |
67 ctx.lineTo(200, 150); | |
68 ctx.lineTo(200, 200); | |
69 ctx.lineTo(150, 200); | |
70 ctx.fill(); | |
71 | |
72 var d; // imageData.data | |
73 | |
74 // Verify solid shadow. | |
75 d = ctx.getImageData(201, 205, 1, 1).data; | |
76 shouldBe('d[0]', '255'); | |
77 shouldBe('d[1]', '0'); | |
78 shouldBe('d[2]', '0'); | |
79 shouldBe('d[3]', '255'); | |
80 | |
81 d = ctx.getImageData(298, 295, 1, 1).data; | |
82 shouldBe('d[0]', '255'); | |
83 shouldBe('d[1]', '0'); | |
84 shouldBe('d[2]', '0'); | |
85 shouldBe('d[3]', '255'); | |
86 | |
87 d = ctx.getImageData(201, 298, 1, 1).data; | |
88 shouldBe('d[0]', '255'); | |
89 shouldBe('d[1]', '0'); | |
90 shouldBe('d[2]', '0'); | |
91 shouldBe('d[3]', '255'); | |
92 | |
93 // Verify solid alpha shadow. | |
94 d = ctx.getImageData(201, 405, 1, 1).data; | |
95 shouldBe('d[0]', '255'); | |
96 shouldBe('d[1]', '0'); | |
97 shouldBe('d[2]', '0'); | |
98 shouldBeAround('d[3]', '76'); | |
99 | |
100 d = ctx.getImageData(298, 405, 1, 1).data; | |
101 shouldBe('d[0]', '255'); | |
102 shouldBe('d[1]', '0'); | |
103 shouldBe('d[2]', '0'); | |
104 shouldBeAround('d[3]', '76'); | |
105 | |
106 d = ctx.getImageData(205, 498, 1, 1).data; | |
107 shouldBe('d[0]', '255'); | |
108 shouldBe('d[1]', '0'); | |
109 shouldBe('d[2]', '0'); | |
110 shouldBeAround('d[3]', '76'); | |
111 | |
112 // Verify blurry shadow. | |
113 d = ctx.getImageData(398, 205, 1, 1).data; | |
114 shouldBe('d[0]', '255'); | |
115 shouldBe('d[1]', '0'); | |
116 shouldBe('d[2]', '0'); | |
117 shouldBeAround('d[3]', '83'); | |
118 | |
119 d = ctx.getImageData(501, 205, 1, 1).data; | |
120 shouldBe('d[0]', '255'); | |
121 shouldBe('d[1]', '0'); | |
122 shouldBe('d[2]', '0'); | |
123 shouldBeAround('d[3]', '83'); | |
124 | |
125 d = ctx.getImageData(500, 300, 1, 1).data; | |
126 shouldBe('d[0]', '255'); | |
127 shouldBe('d[1]', '0'); | |
128 shouldBe('d[2]', '0'); | |
129 shouldBeAround('d[3]', '53'); | |
130 | |
131 // Verify blurry alpha shadow. | |
132 d = ctx.getImageData(398, 405, 1, 1).data; | |
133 shouldBe('d[0]', '255'); | |
134 shouldBe('d[1]', '0'); | |
135 shouldBe('d[2]', '0'); | |
136 shouldBeAround('d[3]', '24'); | |
137 | |
138 d = ctx.getImageData(405, 501, 1, 1).data; | |
139 shouldBe('d[0]', '255'); | |
140 shouldBe('d[1]', '0'); | |
141 shouldBe('d[2]', '0'); | |
142 shouldBeAround('d[3]', '24'); | |
143 | |
144 d = ctx.getImageData(405, 501, 1, 1).data; | |
145 shouldBe('d[0]', '255'); | |
146 shouldBe('d[1]', '0'); | |
147 shouldBe('d[2]', '0'); | |
148 shouldBeAround('d[3]', '24'); | |
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