1 description("Ensure correct behavior of canvas with fillRect shadow");
3 function print(message, color)
5 var paragraph = document.createElement("div");
6 paragraph.appendChild(document.createTextNode(message));
7 paragraph.style.fontFamily = "monospace";
9 paragraph.style.color = color;
10 document.getElementById("console").appendChild(paragraph);
13 function shouldBeAround(a, b)
22 if (Math.abs(evalA - b) < 5)
23 print("PASS " + a + " is around " + b , "green")
25 print("FAIL " + a + " is not around " + b + " (actual: " + evalA + ")", "red");
28 function shouldBeSmaller(a, b)
38 print("PASS " + a + " is smaller than " + b , "green")
40 print("FAIL " + a + " is not smaller than " + b + " (actual: " + evalA + ")", "red");
43 var canvas = document.createElement('canvas');
44 document.body.appendChild(canvas);
45 canvas.setAttribute('width', '400');
46 canvas.setAttribute('height', '650');
47 var ctx = canvas.getContext('2d');
49 ctx.shadowOffsetX = 200;
50 ctx.fillStyle = 'rgba(0, 0, 255, 1)';
52 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
53 ctx.fillRect(50, 50, 100, 100);
55 ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
56 ctx.fillRect(50, 200, 100, 100);
58 ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
60 ctx.fillRect(50, 350, 100, 100);
62 ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
63 ctx.fillRect(50, 500, 100, 100);
65 var d; // imageData.data
67 // Verify solid shadow.
68 d = ctx.getImageData(250, 50, 1, 1).data;
69 shouldBe('d[0]', '255');
70 shouldBe('d[1]', '0');
71 shouldBe('d[2]', '0');
72 shouldBe('d[3]', '255');
74 d = ctx.getImageData(250, 149, 1, 1).data;
75 shouldBe('d[0]', '255');
76 shouldBe('d[1]', '0');
77 shouldBe('d[2]', '0');
78 shouldBe('d[3]', '255');
80 d = ctx.getImageData(349, 50, 1, 1).data;
81 shouldBe('d[0]', '255');
82 shouldBe('d[1]', '0');
83 shouldBe('d[2]', '0');
84 shouldBe('d[3]', '255');
86 d = ctx.getImageData(349, 149, 1, 1).data;
87 shouldBe('d[0]', '255');
88 shouldBe('d[1]', '0');
89 shouldBe('d[2]', '0');
90 shouldBe('d[3]', '255');
92 // Verify solid alpha shadow.
93 d = ctx.getImageData(250, 200, 1, 1).data;
94 shouldBe('d[0]', '255');
95 shouldBe('d[1]', '0');
96 shouldBe('d[2]', '0');
97 shouldBeAround('d[3]', '76');
99 d = ctx.getImageData(250, 299, 1, 1).data;
100 shouldBe('d[0]', '255');
101 shouldBe('d[1]', '0');
102 shouldBe('d[2]', '0');
103 shouldBeAround('d[3]', '76');
105 d = ctx.getImageData(349, 200, 1, 1).data;
106 shouldBe('d[0]', '255');
107 shouldBe('d[1]', '0');
108 shouldBe('d[2]', '0');
109 shouldBeAround('d[3]', '76');
111 d = ctx.getImageData(349, 299, 1, 1).data;
112 shouldBe('d[0]', '255');
113 shouldBe('d[1]', '0');
114 shouldBe('d[2]', '0');
115 shouldBeAround('d[3]', '76');
117 // Verify blurry shadow.
118 d = ctx.getImageData(248, 348, 1, 1).data;
119 shouldBe('d[0]', '255');
120 shouldBe('d[1]', '0');
121 shouldBe('d[2]', '0');
122 shouldBeSmaller('d[3]', '25');
124 d = ctx.getImageData(248, 451, 1, 1).data;
125 shouldBe('d[0]', '255');
126 shouldBe('d[1]', '0');
127 shouldBe('d[2]', '0');
128 shouldBeSmaller('d[3]', '25');
130 d = ctx.getImageData(351, 348, 1, 1).data;
131 shouldBe('d[0]', '255');
132 shouldBe('d[1]', '0');
133 shouldBe('d[2]', '0');
134 shouldBeSmaller('d[3]', '25');
136 d = ctx.getImageData(351, 451, 1, 1).data;
137 shouldBe('d[0]', '255');
138 shouldBe('d[1]', '0');
139 shouldBe('d[2]', '0');
140 shouldBeSmaller('d[3]', '25');
142 // Verify blurry alpha shadow.
143 d = ctx.getImageData(248, 498, 1, 1).data;
144 shouldBe('d[0]', '255');
145 shouldBe('d[1]', '0');
146 shouldBe('d[2]', '0');
147 shouldBeSmaller('d[3]', '10');
149 d = ctx.getImageData(248, 601, 1, 1).data;
150 shouldBe('d[0]', '255');
151 shouldBe('d[1]', '0');
152 shouldBe('d[2]', '0');
153 shouldBeSmaller('d[3]', '10');
155 d = ctx.getImageData(351, 498, 1, 1).data;
156 shouldBe('d[0]', '255');
157 shouldBe('d[1]', '0');
158 shouldBe('d[2]', '0');
159 shouldBeSmaller('d[3]', '10');
161 d = ctx.getImageData(351, 601, 1, 1).data;
162 shouldBe('d[0]', '255');
163 shouldBe('d[1]', '0');
164 shouldBe('d[2]', '0');
165 shouldBeSmaller('d[3]', '10');