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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,121 +1,128 @@ | ||
| (function (app) { | ||
| var cam, intervalId, canvas, canvasCtx, ascii, btnStart, btnStop; | ||
|
|
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| var loopSpeed = 100; | ||
| var width = 160; | ||
| var height = 120; | ||
|
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| app.init = function () { | ||
| //Get all the page element we need | ||
| cam = document.getElementById('cam'); | ||
| ascii = document.getElementById("asciiText"); | ||
| canvas = document.createElement("canvas"); | ||
| canvasCtx = canvas.getContext("2d"); | ||
| btnStart = document.getElementById('startbtn'); | ||
| btnStop = document.getElementById('stopbtn'); | ||
|
|
||
| //Init events | ||
| btnStart.addEventListener('click',app.startCam); | ||
| btnStop.addEventListener('click',app.stopCam); | ||
| }; | ||
|
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||
| app.startCam = function (e) { | ||
| // Get specific vendor methods | ||
| navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia; | ||
| window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL; | ||
|
|
||
| // If browser supports user media | ||
| if (navigator.getUserMedia) { | ||
| navigator.getUserMedia({video: true, toString: function() { return "video"; } }, | ||
| function successCallback(stream) { | ||
| if(navigator.getUserMedia==navigator.mozGetUserMedia) { | ||
| cam.src = stream; | ||
| } else { | ||
| cam.src = window.URL.createObjectURL(stream) || stream; | ||
| } | ||
| cam.play(); | ||
| intervalId = setInterval(app.loop, loopSpeed); | ||
| btnStart.style.display = "none"; | ||
| btnStop.style.display = "inline-block"; | ||
| }, | ||
| function errorCallback(error) { | ||
| alert("An error ocurred getting user media. Code:" + error.code); | ||
| }); | ||
| } | ||
| else | ||
| { | ||
| //Browser doesn't support user media | ||
| alert("Your browser does not support user media"); | ||
| } | ||
|
|
||
| e.preventDefault(); | ||
| }; | ||
|
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| app.stopCam = function (e) { | ||
| clearInterval(intervalId); | ||
| cam.src = ""; | ||
| e.preventDefault(); | ||
| btnStop.style.display = "none"; | ||
| btnStart.style.display = "inline-block"; | ||
| }; | ||
|
|
||
| //The generation of the ascii text was taken from this great sample from thecodeplayer: | ||
| //http://thecodeplayer.com/walkthrough/cool-ascii-animation-using-an-image-sprite-canvas-and-javascript | ||
| app.loop = function () { | ||
| var r, g, b, gray; | ||
| var character, line = ""; | ||
|
|
||
| //clear canvas | ||
| canvasCtx.clearRect (0, 0, width, height); | ||
|
|
||
| //draw the video frame | ||
| canvasCtx.drawImage(cam, 0, 0, width, height); | ||
|
|
||
| //accessing pixel data | ||
| var pixels = canvasCtx.getImageData(0, 0, width, height); | ||
| var colordata = pixels.data; | ||
|
|
||
| //every pixel gives 4 integers -> r, g, b, a | ||
| //so length of colordata array is width*height*4 | ||
|
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| ascii.innerHTML = ''; //clear contents | ||
|
|
||
| for(var i = 0; i < colordata.length; i = i+4) | ||
| { | ||
| r = colordata[i]; | ||
| g = colordata[i+1]; | ||
| b = colordata[i+2]; | ||
| //converting the pixel into grayscale | ||
| gray = r*0.2126 + g*0.7152 + b*0.0722; | ||
| //overwriting the colordata array with grayscale values | ||
| //colordata[i] = colordata[i+1] = colordata[i+2] = gray; | ||
|
|
||
| //text for ascii art. | ||
| //blackish = dense characters like "W", "@" | ||
| //whitish = light characters like "`", "." | ||
| if(gray > 250) character = " "; //almost white | ||
| else if(gray > 230) character = "`"; | ||
| else if(gray > 200) character = ":"; | ||
| else if(gray > 175) character = "*"; | ||
| else if(gray > 150) character = "+"; | ||
| else if(gray > 125) character = "#"; | ||
| else if(gray > 50) character = "W"; | ||
| else character = "@"; //almost black | ||
|
|
||
| //newlines and injection into dom | ||
| if(i !== 0 && (i/4)%width === 0) //if the pointer reaches end of pixel-line | ||
| { | ||
| ascii.appendChild(document.createTextNode(line)); | ||
| //newline | ||
| ascii.appendChild(document.createElement("br")); | ||
| //emptying line for the next row of pixels. | ||
| line = ""; | ||
| } | ||
|
|
||
| line += character; | ||
| } | ||
| }; | ||
|
|
||
| app.init(); | ||
|
|
||
| }(window.asciicam = window.asciicam || {})); | ||
| /*jslint browser: true */ | ||
| (function (app) { | ||
| "use strict"; | ||
| var cam, intervalId, canvas, canvasCtx, ascii, btnStart, btnStop, | ||
| loopSpeed = 100, | ||
| width = 160, | ||
| height = 120; | ||
|
|
||
| app.init = function () { | ||
| //Get all the page element we need | ||
| cam = document.getElementById('cam'); | ||
| ascii = document.getElementById("asciiText"); | ||
| canvas = document.createElement("canvas"); | ||
| canvasCtx = canvas.getContext("2d"); | ||
| btnStart = document.getElementById('startbtn'); | ||
| btnStop = document.getElementById('stopbtn'); | ||
|
|
||
| //Init events | ||
| btnStart.addEventListener('click', app.startCam); | ||
| btnStop.addEventListener('click', app.stopCam); | ||
| }; | ||
|
|
||
| app.startCam = function (e) { | ||
| // Get specific vendor methods | ||
| navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia; | ||
| window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL; | ||
|
|
||
| // If browser supports user media | ||
| if (navigator.getUserMedia) { | ||
| navigator.getUserMedia({video: true, toString: function () { return "video"; } }, | ||
| function successCallback(stream) { | ||
| //if (navigator.getUserMedia === navigator.mozGetUserMedia) { | ||
| // cam.src = stream; | ||
| //} else { | ||
| cam.src = window.URL.createObjectURL(stream) || stream; | ||
| //} | ||
| cam.play(); | ||
| intervalId = setInterval(app.loop, loopSpeed); | ||
| btnStart.style.display = "none"; | ||
| btnStop.style.display = "inline-block"; | ||
| }, | ||
| function errorCallback(error) { | ||
| window.alert("An error ocurred getting user media. Code:" + error.code); | ||
| }); | ||
| } else { | ||
| //Browser doesn't support user media | ||
| window.alert("Your browser does not support user media"); | ||
| } | ||
|
|
||
| e.preventDefault(); | ||
| }; | ||
|
|
||
| app.stopCam = function (e) { | ||
| clearInterval(intervalId); | ||
| cam.src = ""; | ||
| e.preventDefault(); | ||
| btnStop.style.display = "none"; | ||
| btnStart.style.display = "inline-block"; | ||
| }; | ||
|
|
||
| //The generation of the ascii text was taken from this great sample from thecodeplayer: | ||
| //http://thecodeplayer.com/walkthrough/cool-ascii-animation-using-an-image-sprite-canvas-and-javascript | ||
| app.loop = function () { | ||
| var r, g, b, gray, pixels, colordata, character, | ||
| line = "", | ||
| i = 0; | ||
|
|
||
| //clear canvas | ||
| canvasCtx.clearRect(0, 0, width, height); | ||
|
|
||
| //draw the video frame | ||
| canvasCtx.drawImage(cam, 0, 0, width, height); | ||
|
|
||
| //accessing pixel data | ||
| pixels = canvasCtx.getImageData(0, 0, width, height); | ||
| colordata = pixels.data; | ||
|
|
||
| //every pixel gives 4 integers -> r, g, b, a | ||
| //so length of colordata array is width*height*4 | ||
|
|
||
| ascii.innerHTML = ''; //clear contents | ||
|
|
||
| for (i = 0; i < colordata.length; i = i + 4) { | ||
| r = colordata[i]; | ||
| g = colordata[i + 1]; | ||
| b = colordata[i + 2]; | ||
| //converting the pixel into grayscale | ||
| gray = r * 0.2126 + g * 0.7152 + b * 0.0722; | ||
| //overwriting the colordata array with grayscale values | ||
| //colordata[i] = colordata[i+1] = colordata[i+2] = gray; | ||
|
|
||
| //text for ascii art. | ||
| //blackish = dense characters like "W", "@" | ||
| //whitish = light characters like "`", "." | ||
| if (gray > 250) { | ||
| character = " "; //almost white | ||
| } else if (gray > 230) { | ||
| character = "`"; | ||
| } else if (gray > 200) { | ||
| character = ":"; | ||
| } else if (gray > 175) { | ||
| character = "*"; | ||
| } else if (gray > 150) { | ||
| character = "+"; | ||
| } else if (gray > 125) { | ||
| character = "#"; | ||
| } else if (gray > 50) { | ||
| character = "W"; | ||
| } else { | ||
| character = "@"; //almost black | ||
| } | ||
|
|
||
| //newlines and injection into dom | ||
| if (i !== 0 && (i / 4) % width === 0) {//if the pointer reaches end of pixel-line | ||
| ascii.appendChild(document.createTextNode(line)); | ||
| //newline | ||
| ascii.appendChild(document.createElement("br")); | ||
| //emptying line for the next row of pixels. | ||
| line = ""; | ||
| } | ||
|
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| line += character; | ||
| } | ||
| }; | ||
|
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||
| app.init(); | ||
|
|
||
| }(window.asciicam = window.asciicam || {})); |