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1 description("Ensure that canvas shadowBlur is not affected by transformations.")
; | |
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) < 10) | |
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', '600'); | |
32 var ctx = canvas.getContext('2d'); | |
33 | |
34 ctx.shadowBlur = 25; | |
35 ctx.shadowOffsetX = 100; | |
36 ctx.shadowOffsetY = 100; | |
37 ctx.fillStyle = 'rgba(0, 0, 255, 1)'; | |
38 | |
39 // top left | |
40 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; | |
41 ctx.scale(4, 4); | |
42 ctx.rotate(Math.PI/2); | |
43 ctx.translate(25, -50); | |
44 ctx.fillRect(0, 0, 25, 25); | |
45 | |
46 // bottom left | |
47 ctx.shadowColor = 'rgba(255, 0, 0, 0.5)'; | |
48 ctx.setTransform(1, 0, 0, 1, 0, 0); | |
49 ctx.scale(0.5, 0.5); | |
50 ctx.fillRect(200, 600, 200, 200); | |
51 | |
52 // top right | |
53 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)'; | |
54 ctx.scale(2, 2); | |
55 ctx.fillRect(300, 100, 100, 100); | |
56 | |
57 // bottom right | |
58 ctx.shadowColor = 'rgba(255, 0, 0, 0.5)'; | |
59 ctx.fillRect(300, 300, 100, 100); | |
60 | |
61 var d; | |
62 | |
63 // top left | |
64 d = ctx.getImageData(250, 250, 1, 1).data; | |
65 shouldBe('d[0]', '255'); | |
66 shouldBe('d[1]', '0'); | |
67 shouldBe('d[2]', '0'); | |
68 shouldBeAround('d[3]', '255'); | |
69 | |
70 d = ctx.getImageData(250, 175, 1, 1).data; | |
71 shouldBe('d[0]', '0'); | |
72 shouldBe('d[1]', '0'); | |
73 shouldBe('d[2]', '0'); | |
74 shouldBe('d[3]', '0'); | |
75 | |
76 d = ctx.getImageData(250, 325, 1, 1).data; | |
77 shouldBe('d[0]', '0'); | |
78 shouldBe('d[1]', '0'); | |
79 shouldBe('d[2]', '0'); | |
80 shouldBe('d[3]', '0'); | |
81 | |
82 d = ctx.getImageData(175, 250, 1, 1).data; | |
83 shouldBe('d[0]', '0'); | |
84 shouldBe('d[1]', '0'); | |
85 shouldBe('d[2]', '0'); | |
86 shouldBe('d[3]', '0'); | |
87 | |
88 d = ctx.getImageData(325, 250, 1, 1).data; | |
89 shouldBe('d[0]', '0'); | |
90 shouldBe('d[1]', '0'); | |
91 shouldBe('d[2]', '0'); | |
92 shouldBe('d[3]', '0'); | |
93 | |
94 // bottom left | |
95 d = ctx.getImageData(250, 450, 1, 1).data; | |
96 shouldBe('d[0]', '255'); | |
97 shouldBe('d[1]', '0'); | |
98 shouldBe('d[2]', '0'); | |
99 shouldBeAround('d[3]', '126'); | |
100 | |
101 d = ctx.getImageData(250, 375, 1, 1).data; | |
102 shouldBe('d[0]', '0'); | |
103 shouldBe('d[1]', '0'); | |
104 shouldBe('d[2]', '0'); | |
105 shouldBe('d[3]', '0'); | |
106 | |
107 d = ctx.getImageData(250, 525, 1, 1).data; | |
108 shouldBe('d[0]', '0'); | |
109 shouldBe('d[1]', '0'); | |
110 shouldBe('d[2]', '0'); | |
111 shouldBe('d[3]', '0'); | |
112 | |
113 d = ctx.getImageData(175, 450, 1, 1).data; | |
114 shouldBe('d[0]', '0'); | |
115 shouldBe('d[1]', '0'); | |
116 shouldBe('d[2]', '0'); | |
117 shouldBe('d[3]', '0'); | |
118 | |
119 d = ctx.getImageData(325, 450, 1, 1).data; | |
120 shouldBe('d[0]', '0'); | |
121 shouldBe('d[1]', '0'); | |
122 shouldBe('d[2]', '0'); | |
123 shouldBe('d[3]', '0'); | |
124 | |
125 d = ctx.getImageData(250, 250, 1, 1).data; | |
126 shouldBe('d[0]', '255'); | |
127 shouldBe('d[1]', '0'); | |
128 shouldBe('d[2]', '0'); | |
129 shouldBeAround('d[3]', '255'); | |
130 | |
131 // top right | |
132 d = ctx.getImageData(450, 250, 1, 1).data; | |
133 shouldBe('d[0]', '255'); | |
134 shouldBe('d[1]', '0'); | |
135 shouldBe('d[2]', '0'); | |
136 shouldBeAround('d[3]', '255'); | |
137 | |
138 d = ctx.getImageData(450, 175, 1, 1).data; | |
139 shouldBe('d[0]', '0'); | |
140 shouldBe('d[1]', '0'); | |
141 shouldBe('d[2]', '0'); | |
142 shouldBe('d[3]', '0'); | |
143 | |
144 d = ctx.getImageData(450, 325, 1, 1).data; | |
145 shouldBe('d[0]', '0'); | |
146 shouldBe('d[1]', '0'); | |
147 shouldBe('d[2]', '0'); | |
148 shouldBe('d[3]', '0'); | |
149 | |
150 d = ctx.getImageData(375, 250, 1, 1).data; | |
151 shouldBe('d[0]', '0'); | |
152 shouldBe('d[1]', '0'); | |
153 shouldBe('d[2]', '0'); | |
154 shouldBe('d[3]', '0'); | |
155 | |
156 d = ctx.getImageData(525, 250, 1, 1).data; | |
157 shouldBe('d[0]', '0'); | |
158 shouldBe('d[1]', '0'); | |
159 shouldBe('d[2]', '0'); | |
160 shouldBe('d[3]', '0'); | |
161 | |
162 // top right | |
163 d = ctx.getImageData(450, 450, 1, 1).data; | |
164 shouldBe('d[0]', '255'); | |
165 shouldBe('d[1]', '0'); | |
166 shouldBe('d[2]', '0'); | |
167 shouldBeAround('d[3]', '126'); | |
168 | |
169 d = ctx.getImageData(450, 375, 1, 1).data; | |
170 shouldBe('d[0]', '0'); | |
171 shouldBe('d[1]', '0'); | |
172 shouldBe('d[2]', '0'); | |
173 shouldBe('d[3]', '0'); | |
174 | |
175 d = ctx.getImageData(450, 525, 1, 1).data; | |
176 shouldBe('d[0]', '0'); | |
177 shouldBe('d[1]', '0'); | |
178 shouldBe('d[2]', '0'); | |
179 shouldBe('d[3]', '0'); | |
180 | |
181 d = ctx.getImageData(375, 450, 1, 1).data; | |
182 shouldBe('d[0]', '0'); | |
183 shouldBe('d[1]', '0'); | |
184 shouldBe('d[2]', '0'); | |
185 shouldBe('d[3]', '0'); | |
186 | |
187 d = ctx.getImageData(525, 450, 1, 1).data; | |
188 shouldBe('d[0]', '0'); | |
189 shouldBe('d[1]', '0'); | |
190 shouldBe('d[2]', '0'); | |
191 shouldBe('d[3]', '0'); | |
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