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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+</head>
+<body>
+<script type="text/javascript">
+var testFont = '40px sans-serif';
+
+function test(x, y, text, style, rotation, baseline) {
+ var canvas = document.createElement("canvas");
+ canvas.width = 400;
+ canvas.height = 400;
+ canvas.style.cssText = 'position:absolute;' + style;
+ document.getElementsByTagName('body')[0].appendChild(canvas);
+ var ctx = canvas.getContext('2d');
+ ctx.globalAlpha = 0.5;
+ ctx.beginPath();
+ ctx.moveTo(x - 20, y); ctx.lineTo(x + 20, y);
+ ctx.moveTo(x, y - 20); ctx.lineTo(x, y + 20);
+ ctx.stroke();
+ ctx.globalAlpha = 1.0;
+ ctx.font = testFont;
+ if (rotation != 0) {
+ ctx.translate(x,y);
+ ctx.rotate(rotation);
+ ctx.translate(-x,-y);
+ }
+ if (baseline != '') {
+ ctx.textBaseline = baseline;
+ }
+ ctx.fillText(text, x, y);
+}
+
+// Testcase: vertical text with various textBaselines
+// test(100, 50, 'Top', 'writing-mode:vertical-lr', 0, 'top');
+// test(150, 50, 'Middle', 'writing-mode:vertical-lr', 0, 'middle');
+// test(200, 50, 'Alphabetic', 'writing-mode:vertical-lr', 0, 'alphabetic');
+// test(250, 50, 'Bottom', 'writing-mode:vertical-lr', 0, 'bottom');
+
+// Reference: horizontal text with 90° rotation and the same baselines
+test(100, 50, 'Top', 'writing-mode:horizontal-tb', Math.PI/2, 'top');
+test(150, 50, 'Middle', 'writing-mode:horizontal-tb', Math.PI/2, 'middle');
+test(200, 50, 'Alphabetic', 'writing-mode:horizontal-tb', Math.PI/2, 'alphabetic');
+test(250, 50, 'Bottom', 'writing-mode:horizontal-tb', Math.PI/2, 'bottom');
+
+</script>