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Side by Side Diff: conformance/more/demos/video.html

Issue 8342021: Add webgl conformance tests r15841. (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/webgl/sdk/tests/
Patch Set: Created 9 years, 2 months ago
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Property Changes:
Added: svn:eol-style
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1 <html>
2 <head>
3 <meta charset="utf-8">
4 <script type="application/x-javascript" src="../util.js"></script>
5 <script>
6 var processor = {
7 lastTime : new Date,
8 timerCallback: function() {
9 if (this.video.paused || this.video.ended) {
10 return;
11 }
12 this.computeFrame();
13 var t = new Date;
14 var elapsed = t - this.lastTime;
15 this.lastTime = t;
16 var self = this;
17 setTimeout(function () {
18 self.timerCallback();
19 }, Math.max(0, 33-elapsed));
20 },
21
22 init: function() {
23 if (this.initDone) return;
24 this.c2 = document.getElementById("c2");
25 this.ctx2 = this.c2.getContext(GL_CONTEXT_ID);
26 this.greenScreen = new Filter(this.ctx2, 'identity-flip-vert', 'greenScreen' );
27 this.ctx2.activeTexture(this.ctx2.TEXTURE0);
28 this.tex = loadTexture(this.ctx2, this.c1, false);
29 this.ctx2.activeTexture(this.ctx2.TEXTURE1);
30 this.tex2 = loadTexture(this.ctx2, document.getElementById('i'), false);
31 this.ctx2.activeTexture(this.ctx2.TEXTURE0);
32 this.initDone = true;
33 },
34
35 doLoad: function() {
36 this.video = document.getElementById("video");
37 this.c1 = document.getElementById("c1");
38 this.ctx1 = this.c1.getContext("2d");
39 this.ctx1.globalCompositeOperation = 'copy';
40 this.ctx1.fillRect(0,0,this.c1.width, this.c1.height);
41 var self = this;
42 this.video.addEventListener("play", function() {
43 self.init();
44 self.width = self.video.videoWidth;
45 self.height = self.video.videoHeight;
46 self.lastTime = new Date;
47 self.timerCallback();
48 }, false);
49 },
50
51 computeFrame: function() {
52 // this.ctx1.drawImage(this.video, 0, 0, this.width, this.height);
53 this.ctx2.texImage2D(this.ctx2.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_ BYTE, this.video);
54 this.greenScreen.apply(function(s) {
55 s.uniform1i('Texture', 0);
56 s.uniform1i('Texture2', 1);
57 });
58
59 return;
60 }
61 };
62
63 </script>
64 <script id="identity-flip-vert" type="x-shader/x-vertex">
65 attribute vec3 Vertex;
66 attribute vec2 Tex;
67
68 varying vec4 texCoord0;
69 void main()
70 {
71 texCoord0 = vec4(Tex.s,1.0-Tex.t,0.0,0.0);
72 gl_Position = vec4(Vertex, 1.0);
73 }
74 </script>
75 <script id="greenScreen" type="x-shader/x-fragment">
76 precision mediump float;
77
78 uniform sampler2D Texture;
79 uniform sampler2D Texture2;
80
81 varying vec4 texCoord0;
82 void main()
83 {
84 vec4 c = texture2D(Texture, texCoord0.st);
85 float r = c.r * 0.5;
86 float a = c.g * 6.28;
87 float x = cos(a) * r;
88 float y = sin(a) * r;
89 vec4 c2 = texture2D(Texture2, vec2(0.7+x, 0.5+y));
90 // Shaders with branches are not allowed when dealing with non-SOP conte nt
91 // so instead of "if (b) c2.a = 0;", we use mix()
92 bool b = (c.g > 120.0/255.0 && c.r > 120.0/255.0 && c.b < 50.0/255.0);
93 c2.a = mix(c2.a, 0.0, float(b));
94 gl_FragColor = c2;
95 }
96 </script>
97 <style>
98 body {
99 background: black;
100 color:#CCCCCC;
101 }
102 a {
103 color: white;
104 }
105 #c2 {
106 background-image: url(http://www.mozbox.org/pub/green/foo.png);
107 background-repeat: repeat;
108 }
109 div {
110 float: left;
111 border :1px solid #444444;
112 padding:10px;
113 margin: 10px;
114 background:#3B3B3B;
115 }
116 img { display: none; }
117 </style>
118 </head>
119 <body onload="processor.doLoad()">
120 <div>
121 This is a port of Paul Rouget's <a href="http://blog.mozbox.org/post/200 9/02/25/video-canvas%3A-special-effects">Canvas+Video green screen demo</a>, plu s a texture lookup from the Firefox logo based on the values of the green and re d color channels.
122 </div>
123 <div>
124 <video id="video" controls="true">
125 <source src="http://www.mozbox.org/pub/green/video.ogv"></source>
126 <source src="http://cs.helsinki.fi/u/ilmarihe/c3d/demos/video.mp4"></sou rce>
127 </video>
128 <canvas id="c1" width="320" height="192"></canvas>
129 </div>
130 <div>
131 <canvas id="c2" width="640" height="384"></canvas>
132 </div>
133 <img id="i" src="http://www.mozbox.org/pub/green/foo.png">
134 </body>
135 </html>
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