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<!--
Copyright 2009, Google Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->
<!--
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>
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