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<!--
Sample demonstrating different fonts used for text rendering using
the Canvas API.
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>
O3D Canvas
</title>
<!-- Include sample javascript library functions-->
<script type="text/javascript" src="o3djs/base.js"></script>
<!-- Our javascript code -->
<script type="text/javascript" id="o3dscript">
o3djs.require('o3djs.util');
o3djs.require('o3djs.math');
o3djs.require('o3djs.canvas');
o3djs.require('o3djs.rendergraph');
// Events
// init() once the page has finished loading.
// unload() when the page is unloaded.
window.onload = createClients;
// Globals
var g_client;
var g_pack;
var g_viewInfo;
var g_math;
var g_o3d;
var g_finished = false; // for selenium testing.
function createClients() {
o3djs.util.makeClients(init);
}
function init(clientElements) {
// Initialize global variables and libraries.
var o3dElement = clientElements[0];
g_o3d = o3dElement.o3d;
g_math = o3djs.math;
g_client = o3dElement.client;
// Create a pack to manage our resources/assets
g_pack = g_client.createPack();
g_viewInfo = o3djs.rendergraph.createBasicView(
g_pack,
g_client.root,
g_client.renderGraphRoot);
// Set the background color to blue.
g_viewInfo.clearBuffer.clearColor = [0.5, 0.1, 1, 1];
// Setup an orthographic projection camera.
g_viewInfo.drawContext.projection = g_math.matrix4.orthographic(
0 + 0.5,
g_client.width + 0.5,
g_client.height + 0.5,
0 + 0.5,
0.001,
1000);
g_viewInfo.drawContext.view = g_math.matrix4.lookAt(
[0, 0, 1], // Eye.
[0, 0, 0], // Target.
[0, 1, 0]); // Up.
// Create an instance of the canvas utilities library.
var canvasLib = o3djs.canvas.create(g_pack, g_client.root, g_viewInfo);
// Create a canvas surface to draw on.
var canvasQuad = canvasLib.createXYQuad(50, 50, -1, 700, 500, false);
canvasQuad.canvas.clear([1, 1, 1, 1]);
canvasQuad.updateTexture();
var backgroundPaint = g_pack.createObject('CanvasPaint');
backgroundPaint.color = [1, 0.94, 0.94, 1];
var textPaint = g_pack.createObject('CanvasPaint');
textPaint.color = [0, 0, 0, 1];
textPaint.textSize = 24;
// Set drawTextBox to true to display the box showing the text extents
// returned by CanvasPaint.measureText()
var drawTextBox = false;
var typefaceArray = [ 'Arial', 'Arial Black', 'Comic Sans MS', 'Courier New',
'Georgia', 'Impact', 'Palatino', 'Verdana',
'Webdings' ];
var verticalPosition = 10;
var horizontalPosition = 50;
for (var ii = 0; ii < typefaceArray.length; ii++) {
textPaint.textTypeface = typefaceArray[ii];
var lineDimensions = textPaint.measureText(typefaceArray[ii]);
// Add enough vertical spacing to clear the height of the text.
verticalPosition += lineDimensions[3] - lineDimensions[1] + 20;
if (drawTextBox) {
// Add the text origin position.
textSize[0] += horizontalPosition;
textSize[1] += verticalPosition;
textSize[2] += horizontalPosition;
textSize[3] += verticalPosition;
canvasQuad.canvas.drawRect(lineDimensions[0],
lineDimensions[1],
lineDimensions[2],
lineDimensions[3],
backgroundPaint);
}
canvasQuad.canvas.drawText(typefaceArray[ii],
horizontalPosition,
verticalPosition,
textPaint);
}
var internationalText = [ 'ελληνικά', 'Српски' ];
textPaint.textTypeface = 'Arial';
horizontalPosition = 400;
verticalPosition = 10;
for (var ii = 0; ii < internationalText.length; ii++) {
var lineDimensions = textPaint.measureText(typefaceArray[ii]);
// Add enough vertical spacing to clear the height of the text.
verticalPosition += lineDimensions[3] - lineDimensions[1] + 20;
canvasQuad.canvas.drawText(internationalText[ii],
horizontalPosition,
verticalPosition,
textPaint);
}
// Update the o3d texture associated with the canvas quad object.
canvasQuad.updateTexture();
g_finished = true;
}
</script>
</head>
<body>
<h1>O3D Canvas Sample: Fonts</h1>
<br/>
<!-- Start of O3D plugin -->
<div id="o3d" style="width: 800px; height: 600px;"></div>
<!-- End of O3D plugin -->
</body>
</html>