1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
<!DOCTYPE HTML>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
function checkNoCrop(imageBitmap)
{
var canvas = document.createElement("canvas");
canvas.width = 50;
canvas.height = 50;
var ctx = canvas.getContext("2d");
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(imageBitmap, 0, 0);
var d = ctx.getImageData(0, 0, 1, 1).data;
assert_array_equals(d, [255, 0, 0, 255], "This pixel should be red.");
d = ctx.getImageData(39, 0, 1, 1).data;
assert_array_equals(d, [0, 255, 0, 255], "This pixel should be green.");
d = ctx.getImageData(0, 39, 1, 1).data;
assert_array_equals(d, [0, 0, 255, 255], "This pixel should be blue.");
d = ctx.getImageData(39, 39, 1, 1).data;
assert_array_equals(d, [0, 0, 0, 255], "This pixel should be black.");
d = ctx.getImageData(41, 41, 1, 1).data;
assert_array_equals(d, [0, 0, 0, 0], "This pixel should be transparent black.");
}
function checkCrop(imageBitmap)
{
var canvas = document.createElement("canvas");
canvas.width = 50;
canvas.height = 50;
var ctx = canvas.getContext("2d");
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(imageBitmap, 0, 0);
var d = ctx.getImageData(0, 0, 1, 1).data;
assert_array_equals(d, [255, 0, 0, 255], "This pixel should be red.");
d = ctx.getImageData(19, 0, 1, 1).data;
assert_array_equals(d, [0, 255, 0, 255], "This pixel should be green.");
d = ctx.getImageData(0, 19, 1, 1).data;
assert_array_equals(d, [0, 0, 255, 255], "This pixel should be blue.");
d = ctx.getImageData(19, 19, 1, 1).data;
assert_array_equals(d, [0, 0, 0, 255], "This pixel should be black.");
d = ctx.getImageData(21, 21, 1, 1).data;
assert_array_equals(d, [0, 0, 0, 0], "This pixel should be transparent black.");
}
function compareBitmaps(bitmap1, bitmap2)
{
var canvas1 = document.createElement("canvas");
var canvas2 = document.createElement("canvas");
canvas1.width = 50;
canvas1.height = 50;
canvas2.width = 50;
canvas2.height = 50;
var ctx1 = canvas1.getContext("2d");
var ctx2 = canvas2.getContext("2d");
ctx1.clearRect(0, 0, canvas1.width, canvas1.height);
ctx2.clearRect(0, 0, canvas2.width, canvas2.height);
ctx1.drawImage(bitmap1, 0, 0);
ctx2.drawImage(bitmap2, 0, 0);
var data1 = ctx1.getImageData(0, 0, 50, 50).data;
var data2 = ctx2.getImageData(0, 0, 50, 50).data;
var dataMatched = true;
for (var i = 0; i < data1.length; i++) {
if (data1[i] != data2[i]) {
dataMatched = false;
break;
}
}
assert_false(dataMatched);
}
function testImageBitmap(source)
{
return Promise.all([
createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "high"}),
createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "medium"}),
createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "low"}),
createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "pixelated"}),
createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "high"}),
createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "medium"}),
createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "low"}),
createImageBitmap(source, 5, 5, 10, 10, {resizeWidth: 20, resizeHeight: 20, resizeQuality: "pixelated"}),
]).then(([noCropHigh, noCropMedium, noCropLow, noCropPixelated, cropHigh, cropMedium, cropLow, cropPixelated]) => {
checkNoCrop(noCropHigh);
checkNoCrop(noCropMedium);
checkNoCrop(noCropLow);
checkNoCrop(noCropPixelated);
checkCrop(cropHigh);
checkCrop(cropMedium);
checkCrop(cropLow);
checkCrop(cropPixelated);
// Brute-force comparison among all bitmaps is too expensive
compareBitmaps(noCropHigh, noCropMedium);
compareBitmaps(noCropLow, noCropPixelated);
compareBitmaps(cropHigh, cropMedium);
compareBitmaps(cropLow, cropPixelated);
});
}
function initializeTestCanvas()
{
var testCanvas = document.createElement("canvas");
testCanvas.width = 20;
testCanvas.height = 20;
var testCtx = testCanvas.getContext("2d");
testCtx.fillStyle = "rgb(255, 0, 0)";
testCtx.fillRect(0, 0, 10, 10);
testCtx.fillStyle = "rgb(0, 255, 0)";
testCtx.fillRect(10, 0, 10, 10);
testCtx.fillStyle = "rgb(0, 0, 255)";
testCtx.fillRect(0, 10, 10, 10);
testCtx.fillStyle = "rgb(0, 0, 0)";
testCtx.fillRect(10, 10, 10, 10);
return testCanvas;
}
// Blob
promise_test(function() {
return new Promise((resolve, reject) => {
var xhr = new XMLHttpRequest();
xhr.open("GET", '/images/pattern.png');
xhr.responseType = 'blob';
xhr.send();
xhr.onload = function() {
resolve(xhr.response);
};
}).then(testImageBitmap);
}, 'createImageBitmap from a Blob with resize option.');
// HTMLCanvasElement
promise_test(function() {
var testCanvas = initializeTestCanvas();
return testImageBitmap(testCanvas);
}, 'createImageBitmap from a HTMLCanvasElement with resize option.');
// HTMLImageElement
promise_test(function() {
return new Promise((resolve, reject) => {
var image = new Image();
image.onload = function() {
resolve(image);
}
image.src = '/images/pattern.png'
}).then(testImageBitmap);
}, 'createImageBitmap from a HTMLImageElement with resize option.');
// HTMLImageElement of svg with no specified size
promise_test(function() {
return new Promise((resolve, reject) => {
var image = new Image();
image.onload = function() {
resolve(image);
}
image.src = '/images/pattern-nosize.svg'
}).then(testImageBitmap);
}, 'createImageBitmap from a HTMLImageElement of svg with no specified size with resize option.');
// ImageBitmap
promise_test(function() {
var testCanvas = initializeTestCanvas();
return createImageBitmap(testCanvas).then(testImageBitmap);
}, 'createImageBitmap from an ImageBitmap with resize option.');
// ImageData
promise_test(function() {
var canvas = initializeTestCanvas();
var ctx = canvas.getContext("2d");
var data = ctx.getImageData(0, 0, 20, 20);
return testImageBitmap(data);
}, 'createImageBitmap from an ImageData with resize option.');
</script>
|
