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Side by Side Diff: third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-blend-solid.js

Issue 2673013003: 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("Series of tests to ensure correct results on applying different ble nd modes.");
2
3 var tmpimg = document.createElement('canvas');
4 tmpimg.width = 200;
5 tmpimg.height = 200;
6 ctx = tmpimg.getContext('2d');
7
8 // Create the image for blending test with images.
9 var img = document.createElement('canvas');
10 img.width = 200;
11 img.height = 200;
12 var imgCtx = img.getContext('2d');
13 imgCtx.fillStyle = "red";
14 imgCtx.fillRect(0,0,100,100);
15 imgCtx.fillStyle = "yellow";
16 imgCtx.fillRect(100,0,100,100);
17 imgCtx.fillStyle = "green";
18 imgCtx.fillRect(100,100,100,100);
19 imgCtx.fillStyle = "blue";
20 imgCtx.fillRect(0,100,100,100);
21
22
23 // Create expected results.
24 var blendModes =
25 // [blendMode, expectations solid on solid, expectations solid on alpha, expecta tions alpha on solid, expectations alpha on alpha]
26 [
27 ['source-over',
28 [[255, 0, 0, 255],[255, 255, 0, 255],[0, 128, 0, 255],[0, 0, 255, 255]] ,
29 [[128, 0, 127, 255],[128, 128, 127, 255],[0, 64, 127, 255],[0, 0, 255, 255]],
30 [[255, 0, 0, 255],[255, 255, 0, 255],[0, 128, 0, 255],[0, 0, 255, 255]] ,
31 [[171, 0, 84, 191],[171, 171, 84, 191],[0, 85, 84, 191],[0, 0, 255, 191 ]]
32 ],
33 ['multiply',
34 [[0, 0, 0, 255],[0, 0, 0, 255],[0, 0, 0, 255],[0, 0, 255, 255]],
35 [[0, 0, 127, 255],[0, 0, 127, 255],[0, 0, 127, 255],[0, 0, 255, 255]],
36 [[128, 0, 0, 255],[128, 128, 0, 255],[0, 64, 0, 255],[0, 0, 255, 255]],
37 [[85, 0, 84, 191],[85, 85, 84, 191],[0, 43, 84, 191],[0, 0, 255, 191]]
38 ],
39 ['screen',
40 [[255, 0, 255, 255],[255, 255, 255, 255],[0, 128, 255, 255],[0, 0, 255, 255]],
41 [[128, 0, 255, 255],[128, 128, 255, 255],[0, 64, 255, 255],[0, 0, 255, 255]],
42 [[255, 0, 127, 255],[255, 255, 127, 255],[0, 128, 127, 255],[0, 0, 255, 255]],
43 [[171, 0, 170, 191],[171, 171, 170, 191],[0, 85, 170, 191],[0, 0, 255, 191]]
44 ],
45 ['overlay',
46 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
47 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
48 [[128, 0, 127, 255],[128, 128, 127, 255],[0, 64, 127, 255],[0, 0, 255, 255]],
49 [[85, 0, 170, 191],[85, 85, 170, 191],[0, 43, 170, 191],[0, 0, 255, 191 ]]
50 ],
51 ['darken',
52 [[0, 0, 0, 255],[0, 0, 0, 255],[0, 0, 0, 255],[0, 0, 255, 255]],
53 [[0, 0, 127, 255],[0, 0, 127, 255],[0, 0, 127, 255],[0, 0, 255, 255]],
54 [[128, 0, 0, 255],[128, 128, 0, 255],[0, 64, 0, 255],[0, 0, 255, 255]],
55 [[85, 0, 84, 191],[85, 85, 84, 191],[0, 43, 84, 191],[0, 0, 255, 191]]
56 ],
57 ['lighten',
58 [[255, 0, 255, 255],[255, 255, 255, 255],[0, 128, 255, 255],[0, 0, 255, 255]],
59 [[128, 0, 255, 255],[128, 128, 255, 255],[0, 64, 255, 255],[0, 0, 255, 255]],
60 [[255, 0, 127, 255],[255, 255, 127, 255],[0, 128, 127, 255],[0, 0, 255, 255]],
61 [[171, 0, 170, 191],[171, 171, 170, 191],[0, 85, 170, 191],[0, 0, 255, 191]]
62 ],
63 ['color-dodge',
64 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
65 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
66 [[128, 0, 127, 255],[128, 128, 127, 255],[0, 64, 127, 255],[0, 0, 255, 255]],
67 [[85, 0, 170, 191],[85, 85, 170, 191],[0, 43, 170, 191],[0, 0, 255, 191 ]]
68 ],
69 ['color-burn',
70 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
71 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
72 [[128, 0, 127, 255],[128, 128, 127, 255],[0, 64, 127, 255],[0, 0, 255, 255]],
73 [[85, 0, 170, 191],[85, 85, 170, 191],[0, 42, 170, 191],[0, 0, 255, 191 ]]
74
75 ],
76 ['hard-light',
77 [[255, 0, 0, 255],[255, 255, 0, 255],[0, 1, 0, 255],[0, 0, 255, 255]],
78 [[128, 0, 127, 255],[128, 128, 127, 255],[0, 0, 127, 255],[0, 0, 255, 2 55]],
79 [[255, 0, 0, 255],[255, 255, 0, 255],[0, 65, 0, 255],[0, 0, 255, 255]],
80 [[171, 0, 84, 191],[171, 171, 84, 191],[0, 43, 84, 191],[0, 0, 255, 191 ]]
81 ],
82 ['soft-light',
83 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
84 [[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255],[0, 0, 255, 255]],
85 [[128, 0, 127, 255],[128, 128, 127, 255],[0, 64, 127, 255],[0, 0, 255, 255]],
86 [[85, 0, 170, 191],[85, 85, 170, 191],[0, 43, 170, 191],[0, 0, 255, 191 ]]
87 ],
88 ['difference',
89 [[255, 0, 255, 255],[255, 255, 255, 255],[0, 128, 255, 255],[0, 0, 0, 2 55]],
90 [[128, 0, 255, 255],[128, 128, 255, 255],[0, 64, 255, 255],[0, 0, 127, 255]],
91 [[255, 0, 127, 255],[255, 255, 127, 255],[0, 128, 127, 255],[0, 0, 128, 255]],
92 [[171, 0, 170, 191],[171, 171, 170, 191],[0, 85, 170, 191],[0, 0, 171, 191]]
93 ],
94 ['exclusion',
95 [[255, 0, 255, 255],[255, 255, 255, 255],[0, 128, 255, 255],[0, 0, 0, 2 55]],
96 [[128, 0, 255, 255],[128, 128, 255, 255],[0, 64, 255, 255],[0, 0, 127, 255]],
97 [[255, 0, 127, 255],[255, 255, 127, 255],[0, 128, 127, 255],[0, 0, 128, 255]],
98 [[171, 0, 170, 191],[171, 171, 170, 191],[0, 85, 170, 191],[0, 0, 171, 191]]
99 ],
100 ['hue',
101 [[93, 0, 0, 255],[31, 31, 0, 255],[0, 46, 0, 255],[0, 0, 255, 255]],
102 [[49, 0, 127, 255],[16, 16, 127, 255],[0, 25, 127, 255],[0, 0, 255, 255 ]],
103 [[175, 0, 0, 255],[144, 144, 0, 255],[0, 88, 0, 255],[0, 0, 255, 255]],
104 [[116, 0, 84, 191],[96, 96, 84, 191],[0, 58, 84, 191],[0, 0, 255, 191]]
105 ],
106 ['saturation',
107 [[0, 0, 255, 255],[0, 0, 255, 255],[14, 14, 142, 255],[0, 0, 255, 255]] ,
108 [[0, 0, 255, 255],[0, 0, 255, 255],[7, 7, 198, 255],[0, 0, 255, 255]],
109 [[128, 0, 127, 255],[128, 128, 127, 255],[7, 71, 70, 255],[0, 0, 255, 2 55]],
110 [[85, 0, 167, 191],[85, 85, 167, 191],[0, 48, 130, 191],[0, 0, 255, 191 ]]
111 ],
112 ['color',
113 [[93, 0, 0, 255],[31, 31, 0, 255],[0, 47, 0, 255],[0, 0, 255, 255]],
114 [[49, 0, 127, 255],[16, 16, 127, 255],[0, 24, 127, 255],[0, 0, 255, 255 ]],
115 [[175, 0, 0, 255],[144, 144, 0, 255],[0, 88, 0, 255],[0, 0, 255, 255]],
116 [[116, 0, 84, 191],[96, 96, 84, 191],[0, 58, 84, 191],[0, 0, 255, 191]]
117 ],
118 ['luminosity',
119 [[55, 55, 255, 255],[224, 224, 255, 255],[54, 54, 255, 255],[0, 0, 255, 255]],
120 [[28, 28, 255, 255],[112, 112, 255, 255],[27, 27, 255, 255],[0, 0, 255, 255]],
121 [[155, 27, 127, 255],[239, 239, 127, 255],[26, 90, 127, 255],[0, 0, 255 , 255]],
122 [[104, 19, 167, 191],[158, 158, 167, 191],[16, 58, 167, 191],[0, 0, 255 , 191]]
123 ]];
124
125 // [Scenario, alpha on background, alpha on foreground]
126 var testScenario = [
127 ['solid on solid', 1, 1],
128 ['solid on alpha', 1, 0.5],
129 ['alpha on solid', 0.5, 1],
130 ['alpha on alpha', 0.5, 0.5]
131 ];
132
133 testPoints = [{x: 50, y: 50}, {x: 150, y: 50}, {x: 150, y: 150}, {x: 50, y: 150} ];
134
135 function pixelDataAtPoint(i, blend)
136 {
137 return ctx.getImageData(testPoints[i].x, testPoints[i].y , 1, 1).data;
138 }
139
140 function checkBlendModeResult(blendMode, testScenario, expectedColors, sigma) {
141 debug(testScenario);
142 for (var i = 0; i < testPoints.length; i++) {
143 var resultColor = "pixelDataAtPoint(" + i + ")";
144 shouldBeCloseTo(resultColor +"[0]", expectedColors[i][0], sigma);
145 shouldBeCloseTo(resultColor +"[1]", expectedColors[i][1], sigma);
146 shouldBeCloseTo(resultColor +"[2]", expectedColors[i][2], sigma);
147 shouldBeCloseTo(resultColor +"[3]", expectedColors[i][3], sigma);
148 }
149 }
150
151 // Execute test.
152 function prepareTestScenario(sigma) {
153 // Check each blend mode individually.
154 for (var i = 0; i < blendModes.length; i++) {
155 debug('Testing blend mode "' + blendModes[i][0] + '"');
156 for (var j = 0; j < testScenario.length; j++) {
157 ctx.globalCompositeOperation = 'clear';
158 ctx.fillRect(0,0,200,200);
159 ctx.globalCompositeOperation = 'source-over';
160 ctx.save();
161
162 // Draw backdrop.
163 ctx.fillStyle = 'rgba(0, 0, 255, ' + testScenario[j][1] + ')';
164 ctx.fillRect(0,0,200,200);
165
166 // Apply blend mode.
167 ctx.globalCompositeOperation = blendModes[i][0];
168 ctx.globalAlpha = testScenario[j][2];
169 ctx.fillStyle = "red";
170 ctx.fillRect(0,0,100,100);
171 ctx.fillStyle = "yellow";
172 ctx.fillRect(100,0,100,100);
173 ctx.fillStyle = "green";
174 ctx.fillRect(100,100,100,100);
175 ctx.fillStyle = "blue";
176 ctx.fillRect(0,100,100,100);
177 ctx.restore();
178
179 checkBlendModeResult(blendModes[i][0], testScenario[j][0], blendModes[ i][j+1], sigma);
180 ctx.restore();
181 }
182 debug('');
183 }
184 }
185
186 // Run test and allow variation of results.
187 prepareTestScenario(5);
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