mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
136 lines
4.0 KiB
HTML
136 lines
4.0 KiB
HTML
<html>
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<head>
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<script type="application/x-javascript" src="../util.js"></script>
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<script>
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var processor = {
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lastTime : new Date,
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timerCallback: function() {
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if (this.video.paused || this.video.ended) {
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return;
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}
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this.computeFrame();
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var t = new Date;
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var elapsed = t - this.lastTime;
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this.lastTime = t;
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var self = this;
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setTimeout(function () {
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self.timerCallback();
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}, Math.max(0, 33-elapsed));
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},
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init: function() {
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if (this.initDone) return;
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this.c2 = document.getElementById("c2");
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this.ctx2 = this.c2.getContext(GL_CONTEXT_ID);
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this.greenScreen = new Filter(this.ctx2, 'identity-flip-vert', 'greenScreen');
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this.ctx2.activeTexture(this.ctx2.TEXTURE0);
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this.tex = loadTexture(this.ctx2, this.c1, false);
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this.ctx2.activeTexture(this.ctx2.TEXTURE1);
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this.tex2 = loadTexture(this.ctx2, document.getElementById('i'), false);
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this.ctx2.activeTexture(this.ctx2.TEXTURE0);
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this.initDone = true;
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},
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doLoad: function() {
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this.video = document.getElementById("video");
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this.c1 = document.getElementById("c1");
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this.ctx1 = this.c1.getContext("2d");
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this.ctx1.globalCompositeOperation = 'copy';
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this.ctx1.fillRect(0,0,this.c1.width, this.c1.height);
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var self = this;
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this.video.addEventListener("play", function() {
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self.init();
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self.width = self.video.videoWidth;
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self.height = self.video.videoHeight;
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self.lastTime = new Date;
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self.timerCallback();
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}, false);
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},
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computeFrame: function() {
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// this.ctx1.drawImage(this.video, 0, 0, this.width, this.height);
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this.ctx2.texImage2D(this.ctx2.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, this.video);
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this.greenScreen.apply(function(s) {
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s.uniform1i('Texture', 0);
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s.uniform1i('Texture2', 1);
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});
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return;
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}
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};
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</script>
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<script id="identity-flip-vert" type="x-shader/x-vertex">
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attribute vec3 Vertex;
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attribute vec2 Tex;
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varying vec4 texCoord0;
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void main()
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{
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texCoord0 = vec4(Tex.s,1.0-Tex.t,0.0,0.0);
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gl_Position = vec4(Vertex, 1.0);
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}
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</script>
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<script id="greenScreen" type="x-shader/x-fragment">
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#ifdef GL_ES
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precision highp float;
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#endif
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uniform sampler2D Texture;
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uniform sampler2D Texture2;
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varying vec4 texCoord0;
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void main()
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{
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vec4 c = texture2D(Texture, texCoord0.st);
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float r = c.r * 0.5;
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float a = c.g * 6.28;
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float x = cos(a) * r;
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float y = sin(a) * r;
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vec4 c2 = texture2D(Texture2, vec2(0.7+x, 0.5+y));
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// Shaders with branches are not allowed when dealing with non-SOP content
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// so instead of "if (b) c2.a = 0;", we use mix()
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bool b = (c.g > 120.0/255.0 && c.r > 120.0/255.0 && c.b < 50.0/255.0);
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c2.a = mix(c2.a, 0.0, float(b));
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gl_FragColor = c2;
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}
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</script>
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<style>
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body {
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background: black;
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color:#CCCCCC;
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}
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a {
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color: white;
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}
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#c2 {
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background-image: url(http://www.mozbox.org/pub/green/foo.png);
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background-repeat: repeat;
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}
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div {
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float: left;
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border :1px solid #444444;
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padding:10px;
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margin: 10px;
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background:#3B3B3B;
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}
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img { display: none; }
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</style>
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</head>
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<body onload="processor.doLoad()">
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<div>
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This is a port of Paul Rouget's <a href="http://blog.mozbox.org/post/2009/02/25/video-canvas%3A-special-effects">Canvas+Video green screen demo</a>, plus a texture lookup from the Firefox logo based on the values of the green and red color channels.
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</div>
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<div>
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<video id="video" controls="true">
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<source src="http://www.mozbox.org/pub/green/video.ogv"></source>
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<source src="http://cs.helsinki.fi/u/ilmarihe/c3d/demos/video.mp4"></source>
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</video>
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<canvas id="c1" width="320" height="192"></canvas>
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</div>
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<div>
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<canvas id="c2" width="640" height="384"></canvas>
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</div>
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<img id="i" src="http://www.mozbox.org/pub/green/foo.png">
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</body>
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</html>
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