dreemgl
Version:
DreemGL is an open-source multi-screen prototyping framework for mediated environments, with a visual editor and shader styling for webGL and DALi runtimes written in JavaScript. As a toolkit for gpu-accelerated multiscreen development, DreemGL includes
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HTML
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>CodeRay output</title>
<style type="text/css">
.CodeRay .line-numbers a {
text-decoration: inherit;
color: inherit;
}
body {
background-color: white;
padding: 0;
margin: 0;
}
.CodeRay {
background-color: hsl(0,0%,95%);
border: 1px solid silver;
color: black;
}
.CodeRay pre {
margin: 0px;
}
span.CodeRay { white-space: pre; border: 0px; padding: 2px; }
table.CodeRay { border-collapse: collapse; width: 100%; padding: 2px; }
table.CodeRay td { padding: 2px 4px; vertical-align: top; }
.CodeRay .line-numbers {
background-color: hsl(180,65%,90%);
color: gray;
text-align: right;
-webkit-user-select: none;
-moz-user-select: none;
user-select: none;
}
.CodeRay .line-numbers a {
background-color: hsl(180,65%,90%) ;
color: gray ;
text-decoration: none ;
}
.CodeRay .line-numbers pre {
word-break: normal;
}
.CodeRay .line-numbers a:target { color: blue ; }
.CodeRay .line-numbers .highlighted { color: red ; }
.CodeRay .line-numbers .highlighted a { color: red ; }
.CodeRay span.line-numbers { padding: 0px 4px; }
.CodeRay .line { display: block; float: left; width: 100%; }
.CodeRay .code { width: 100%; }
.CodeRay .debug { color: white ; background: blue ; }
.CodeRay .annotation { color:#007 }
.CodeRay .attribute-name { color:#b48 }
.CodeRay .attribute-value { color:#700 }
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.CodeRay .constant { color:#036; font-weight:bold }
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.CodeRay .hex { color:#02b }
.CodeRay .id { color:#33D; font-weight:bold }
.CodeRay .include { color:#B44; font-weight:bold }
.CodeRay .inline { background-color: hsla(0,0%,0%,0.07); color: black }
.CodeRay .inline-delimiter { font-weight: bold; color: #666 }
.CodeRay .instance-variable { color:#33B }
.CodeRay .integer { color:#00D }
.CodeRay .imaginary { color:#f00 }
.CodeRay .important { color:#D00 }
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.CodeRay .label { color:#970; font-weight:bold }
.CodeRay .local-variable { color:#950 }
.CodeRay .map .content { color:#808 }
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.CodeRay .namespace { color:#707; font-weight:bold }
.CodeRay .octal { color:#40E }
.CodeRay .operator { }
.CodeRay .predefined { color:#369; font-weight:bold }
.CodeRay .predefined-constant { color:#069 }
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.CodeRay .preprocessor { color:#579 }
.CodeRay .pseudo-class { color:#00C; font-weight:bold }
.CodeRay .regexp { background-color:hsla(300,100%,50%,0.06); }
.CodeRay .regexp .content { color:#808 }
.CodeRay .regexp .delimiter { color:#404 }
.CodeRay .regexp .modifier { color:#C2C }
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.CodeRay .type { color:#339; font-weight:bold }
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.CodeRay .variable { color:#037 }
.CodeRay .insert { background: hsla(120,100%,50%,0.12) }
.CodeRay .delete { background: hsla(0,100%,50%,0.12) }
.CodeRay .change { color: #bbf; background: #007 }
.CodeRay .head { color: #f8f; background: #505 }
.CodeRay .head .filename { color: white; }
.CodeRay .delete .eyecatcher { background-color: hsla(0,100%,50%,0.2); border: 1px solid hsla(0,100%,45%,0.5); margin: -1px; border-bottom: none; border-top-left-radius: 5px; border-top-right-radius: 5px; }
.CodeRay .insert .eyecatcher { background-color: hsla(120,100%,50%,0.2); border: 1px solid hsla(120,100%,25%,0.5); margin: -1px; border-top: none; border-bottom-left-radius: 5px; border-bottom-right-radius: 5px; }
.CodeRay .insert .insert { color: #0c0; background:transparent; font-weight:bold }
.CodeRay .delete .delete { color: #c00; background:transparent; font-weight:bold }
.CodeRay .change .change { color: #88f }
.CodeRay .head .head { color: #f4f }
.CodeRay {
border: none;
}
</style>
</head>
<body>
<table class="CodeRay"><tr>
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</pre></td>
<td class="code"><pre><span class="comment">/* DreemGL is a collaboration between Teeming Society & Samsung Electronics, sponsored by Samsung and others.
Copyright 2015-2016 Teeming Society. Licensed under the Apache License, Version 2.0 (the "License"); You may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and limitations under the License.*/</span>
define.<span class="reserved">class</span>(<span class="keyword">function</span>(require, <span class="predefined">$ui$</span>, view, label, bargraphic){
<span class="comment">// Simple video player, without controls. Frames from a html5 video are</span>
<span class="comment">// copied into a canvas element. Each image is written to the view's texture.</span>
<span class="comment">// The view needs to use the hardimage shader, so the view is initialized</span>
<span class="comment">// with an empty texture. The video and canvas resources are allocated when</span>
<span class="comment">// the video plays, and released when the video is finished.</span>
<span class="keyword">var</span> Shader = require(<span class="string"><span class="delimiter">'</span><span class="content">$system/platform/$platform/shader$platform</span><span class="delimiter">'</span></span>)
<span class="keyword">var</span> emptytexture = Shader.Texture.fromArray(<span class="keyword">new</span> Uint8Array(<span class="integer">4</span>, <span class="integer">1</span>), <span class="integer">1</span>, <span class="integer">1</span>);
<span class="local-variable">this</span>.attributes = {
<span class="comment">// The URL to an video file to play</span>
<span class="key">url</span>: Config({<span class="key">type</span>:string, <span class="key">value</span>:<span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>})
<span class="comment">// When true (default), start the video track automatically.</span>
,<span class="key">autoplay</span>: Config({<span class="key">type</span>:bool, <span class="key">value</span>:<span class="predefined-constant">true</span>})
<span class="comment">// Video volume (0-1)</span>
,<span class="key">volume</span>: Config({<span class="key">type</span>:<span class="reserved">float</span>, <span class="key">value</span>:<span class="float">0.5</span>})
<span class="comment">// Event generated when screen updates</span>
,<span class="key">update</span>: Config({<span class="key">type</span>:Event}),
}
<span class="comment">// True if the video is playing</span>
<span class="local-variable">this</span>.playing = <span class="predefined-constant">false</span>;
<span class="comment">// True if the video is paused</span>
<span class="local-variable">this</span>.paused = <span class="predefined-constant">false</span>;
<span class="comment">// Length of video (seconds)</span>
<span class="local-variable">this</span>.duration = -<span class="integer">1</span>;
<span class="comment">// Dimensions of video vec2;</span>
<span class="local-variable">this</span>.dimensions = vec2(<span class="integer">0</span>,<span class="integer">0</span>);
<span class="comment">// Current location (time) of playback</span>
<span class="local-variable">this</span>.currenttime = -<span class="integer">1</span>;
<span class="comment">// We want to use the hardimage shader, so specifying a bgimage is needed.</span>
<span class="comment">// In our case, we specify a texture instead of an image.</span>
<span class="local-variable">this</span>.bgimage = emptytexture;
<span class="comment">// Play the video</span>
<span class="local-variable">this</span>.<span class="function">play</span> = <span class="keyword">function</span>() {
<span class="keyword">if</span> (!<span class="local-variable">this</span>.url)
<span class="keyword">return</span>;
<span class="local-variable">this</span>.videoinit();
<span class="comment">// play the video</span>
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">src</span><span class="delimiter">'</span></span>, <span class="local-variable">this</span>.url)
<span class="local-variable">this</span>.videoElement.load();
<span class="local-variable">this</span>.videoElement.currentTime = <span class="integer">0</span>;
<span class="local-variable">this</span>.currenttime = <span class="integer">0</span>;
<span class="local-variable">this</span>.videoElement.play();
<span class="local-variable">this</span>.playing = <span class="predefined-constant">true</span>;
<span class="comment">// Updating in the animation loop is better than waiting for</span>
<span class="comment">// the infrequent ontimeupdate events.</span>
<span class="local-variable">this</span>.<span class="function">animFrame</span> = <span class="keyword">function</span>(time){
<span class="local-variable">this</span>.updatevideo();
<span class="keyword">if</span> (<span class="local-variable">this</span>.playing)
window.requestAnimationFrame(<span class="local-variable">this</span>.animFrame)
}.bind(<span class="local-variable">this</span>);
window.requestAnimationFrame(<span class="local-variable">this</span>.animFrame)
}
<span class="comment">// Pause or restart the video</span>
<span class="local-variable">this</span>.<span class="function">pause</span> = <span class="keyword">function</span>() {
<span class="keyword">if</span> (<span class="local-variable">this</span>.playing) {
<span class="keyword">if</span> (<span class="local-variable">this</span>.paused) {
<span class="local-variable">this</span>.paused = <span class="predefined-constant">false</span>;
<span class="local-variable">this</span>.videoElement.play();
}
<span class="keyword">else</span> {
<span class="local-variable">this</span>.paused = <span class="predefined-constant">true</span>;
<span class="local-variable">this</span>.videoElement.pause();
}
}
}
<span class="comment">// Stop the video</span>
<span class="local-variable">this</span>.<span class="function">stop</span> = <span class="keyword">function</span>() {
<span class="keyword">if</span> (<span class="local-variable">this</span>.videoElement) {
<span class="local-variable">this</span>.videoElement.pause();
<span class="local-variable">this</span>.videoElement.currentTime = <span class="integer">0</span>;
<span class="local-variable">this</span>.currenttime = -<span class="integer">1</span>;
}
<span class="local-variable">this</span>.playing = <span class="predefined-constant">false</span>;
<span class="local-variable">this</span>.videocleanup ();
}
<span class="comment">// Update the texture with a current screenshot from the video.</span>
<span class="local-variable">this</span>.<span class="function">updatevideo</span> = <span class="keyword">function</span>() {
<span class="keyword">if</span> (!<span class="local-variable">this</span>.videoElement)
<span class="keyword">return</span>;
<span class="local-variable">this</span>.currenttime = <span class="local-variable">this</span>.videoElement.currentTime;
t0 = <span class="keyword">new</span> Date();
<span class="comment">// Create the canvas once the video frame size is known</span>
<span class="keyword">if</span> (<span class="local-variable">this</span>.dimensions.x === <span class="integer">0</span>)
<span class="keyword">return</span>;
<span class="keyword">if</span> (!<span class="local-variable">this</span>.canvas) {
<span class="local-variable">this</span>.canvas = document.createElement(<span class="string"><span class="delimiter">'</span><span class="content">canvas</span><span class="delimiter">'</span></span>);
<span class="local-variable">this</span>.canvas.width = <span class="local-variable">this</span>.dimensions.x;
<span class="local-variable">this</span>.canvas.height = <span class="local-variable">this</span>.dimensions.y;
<span class="local-variable">this</span>.canvasContext = <span class="local-variable">this</span>.canvas.getContext(<span class="string"><span class="delimiter">'</span><span class="content">2d</span><span class="delimiter">'</span></span>);
}
<span class="comment">// Draw the current video frame to the canvas</span>
<span class="local-variable">this</span>.canvasContext.drawImage(<span class="local-variable">this</span>.videoElement, <span class="integer">0</span>, <span class="integer">0</span>, <span class="local-variable">this</span>.canvas.width, <span class="local-variable">this</span>.canvas.height);
<span class="comment">// Retrieve the canvas image as a rgba buffer</span>
<span class="keyword">var</span> pels = <span class="local-variable">this</span>.canvasContext.getImageData(<span class="integer">0</span>, <span class="integer">0</span>, <span class="local-variable">this</span>.canvas.width, <span class="local-variable">this</span>.canvas.height);
<span class="comment">// Save to a texture and use as the background image</span>
<span class="keyword">var</span> texture = Shader.Texture.fromArray(pels.data, <span class="local-variable">this</span>.canvas.width, <span class="local-variable">this</span>.canvas.height);
<span class="local-variable">this</span>.setBgImage(texture);
pels = <span class="predefined-constant">null</span>;
texture = <span class="predefined-constant">null</span>;
t1 = <span class="keyword">new</span> Date();
<span class="comment">//console.log('update elapsed', (t1-t0));</span>
<span class="local-variable">this</span>.emit(<span class="string"><span class="delimiter">'</span><span class="content">update</span><span class="delimiter">'</span></span>)
}
<span class="comment">// Initialize the VideoContext</span>
<span class="local-variable">this</span>.<span class="function">videoinit</span> = <span class="keyword">function</span>() {
<span class="keyword">if</span> (!<span class="local-variable">this</span>.videoElement) {
<span class="local-variable">this</span>.videoElement = document.createElement(<span class="string"><span class="delimiter">'</span><span class="content">video</span><span class="delimiter">'</span></span>)
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">volume</span><span class="delimiter">'</span></span>, <span class="local-variable">this</span>.volume);
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">width</span><span class="delimiter">'</span></span>, <span class="local-variable">this</span>.width);
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">height</span><span class="delimiter">'</span></span>, <span class="local-variable">this</span>.height);
<span class="comment">// Try and prevent CORS issues when loading from another domain</span>
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">crossorigin</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">anonymous</span><span class="delimiter">'</span></span>);
<span class="keyword">if</span> (<span class="local-variable">this</span>.autoplay)
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">autoplay</span><span class="delimiter">'</span></span>, <span class="predefined-constant">true</span>);
<span class="comment">// On chrome, preload loads a lot of content, increasing memory usage.</span>
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">preload</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="content">none</span><span class="delimiter">'</span></span>);
<span class="local-variable">this</span>.videoElement.<span class="function">ondurationchange</span> = <span class="keyword">function</span>(data) {
<span class="keyword">if</span> (!<span class="local-variable">this</span>.videoElement)
<span class="keyword">return</span>;
<span class="comment">//console.log('ondurationchange', this.videoElement.duration)</span>
<span class="local-variable">this</span>.dimensions = vec2(<span class="local-variable">this</span>.videoElement.videoWidth, <span class="local-variable">this</span>.videoElement.videoHeight);
<span class="local-variable">this</span>.duration = <span class="local-variable">this</span>.videoElement.duration;
}.bind(<span class="local-variable">this</span>);
<span class="comment">// This event does not fire often enough. Use animation frame instead.</span>
<span class="comment">//this.videoElement.ontimeupdate = function(evt) {</span>
<span class="comment">// if (!this.videoElement)</span>
<span class="comment">// return;</span>
<span class="comment">//</span>
<span class="comment">// console.log('ontimeupdate', this.videoElement.currentTime);</span>
<span class="comment">// this.updatevideo();</span>
<span class="comment">//}.bind(this);</span>
<span class="comment">// When the video is done, stop the playback and delete the canvas and</span>
<span class="comment">// video element.</span>
<span class="local-variable">this</span>.videoElement.<span class="function">onended</span> = <span class="keyword">function</span>(evt) {
<span class="local-variable">this</span>.stop();
<span class="comment">//console.log('onended', evt);</span>
}.bind(<span class="local-variable">this</span>);
}
}
<span class="comment">// Cleanup the VideoContext and canvas</span>
<span class="local-variable">this</span>.<span class="function">videocleanup</span> = <span class="keyword">function</span>() {
<span class="keyword">if</span> (<span class="local-variable">this</span>.canvas) {
<span class="local-variable">this</span>.canvasContext = <span class="predefined-constant">null</span>;
<span class="local-variable">this</span>.canvas = <span class="predefined-constant">null</span>;
}
<span class="keyword">if</span> (<span class="local-variable">this</span>.videoElement) {
<span class="local-variable">this</span>.videoElement.setAttribute(<span class="string"><span class="delimiter">'</span><span class="content">src</span><span class="delimiter">'</span></span>, <span class="string"><span class="delimiter">'</span><span class="delimiter">'</span></span>);
<span class="local-variable">this</span>.videoElement = <span class="predefined-constant">null</span>;
}
<span class="local-variable">this</span>.currenttime = -<span class="integer">1</span>;
}
<span class="local-variable">this</span>.<span class="function">oninit</span> = <span class="keyword">function</span>(){
<span class="comment">// console.log('oninit');</span>
<span class="keyword">if</span> (<span class="local-variable">this</span>.autoplay)
<span class="local-variable">this</span>.play();
}
<span class="local-variable">this</span>.<span class="function">render</span> = <span class="keyword">function</span>(){
<span class="keyword">return</span> [
]
}
})
</pre></td>
</tr></table>
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