HTML5 Canvas gets scaled in browser no matter what

Explorer ,
Apr 28, 2022 Apr 28, 2022

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I have this html5 canvas project which is 900x2000 px in size.

It is supposed to be taller than viewport height and you are supposed to scroll down to see all of it.

 

It is also supposed to be horizontally responsive, so that it shrinks proportionally when the window width is less than 900px.

 

So, I am trying to export the html5 project as responsive by width, and NOT scaled to fit, however when I open it in any browser, the content is stubbornly scaled to vertically fit into the browser.

 

Here is an example of such content:

http://www.yun0.net/animatehtml5/longcontent.html

 

My settings:

 

settings.jpg

 

The exported HTML file:

 

<!DOCTYPE html>
<!--
	NOTES:
	1. All tokens are represented by '$' sign in the template.
	2. You can write your code only wherever mentioned.
	3. All occurrences of existing tokens will be replaced by their appropriate values.
	4. Blank lines will be removed automatically.
	5. Remove unnecessary comments before creating your template.
-->
<html>
<head>
<meta charset="UTF-8">
<meta name="authoring-tool" content="Adobe_Animate_CC">
<title>longcontent</title>
<!-- write your code here -->
<script src="https://code.createjs.com/createjs-2015.11.26.min.js"></script>
<script src="longcontent.js"></script>
<script>
var canvas, stage, exportRoot, anim_container, dom_overlay_container, fnStartAnimation;
function init() {
	canvas = document.getElementById("canvas");
	anim_container = document.getElementById("animation_container");
	dom_overlay_container = document.getElementById("dom_overlay_container");
	handleComplete();
}
function handleComplete() {
	//This function is always called, irrespective of the content. You can use the variable "stage" after it is created in token create_stage.
	exportRoot = new lib.wtf();
	stage = new createjs.Stage(canvas);
	stage.addChild(exportRoot);	
	//Registers the "tick" event listener.
	fnStartAnimation = function() {
		createjs.Ticker.setFPS(lib.properties.fps);
		createjs.Ticker.addEventListener("tick", stage);
	}	    
	//Code to support hidpi screens and responsive scaling.
	function makeResponsive(isResp, respDim, isScale, scaleType) {		
		var lastW, lastH, lastS=1;		
		window.addEventListener('resize', resizeCanvas);		
		resizeCanvas();		
		function resizeCanvas() {			
			var w = lib.properties.width, h = lib.properties.height;			
			var iw = window.innerWidth, ih=window.innerHeight;			
			var pRatio = window.devicePixelRatio || 1, xRatio=iw/w, yRatio=ih/h, sRatio=1;			
			if(isResp) {                
				if((respDim=='width'&&lastW==iw) || (respDim=='height'&&lastH==ih)) {                    
					sRatio = lastS;                
				}				
				else if(!isScale) {					
					if(iw<w || ih<h)						
						sRatio = Math.min(xRatio, yRatio);				
				}				
				else if(scaleType==1) {					
					sRatio = Math.min(xRatio, yRatio);				
				}				
				else if(scaleType==2) {					
					sRatio = Math.max(xRatio, yRatio);				
				}			
			}			
			canvas.width = w*pRatio*sRatio;			
			canvas.height = h*pRatio*sRatio;
			canvas.style.width = dom_overlay_container.style.width = anim_container.style.width =  w*sRatio+'px';				
			canvas.style.height = anim_container.style.height = dom_overlay_container.style.height = h*sRatio+'px';
			stage.scaleX = pRatio*sRatio;			
			stage.scaleY = pRatio*sRatio;			
			lastW = iw; lastH = ih; lastS = sRatio;		
		}
	}
	makeResponsive(true,'width',false,1);	
	fnStartAnimation();
}
</script>
<!-- write your code here -->
</head>
<body onload="init();" style="margin:0px;">
	<div id="animation_container" style="background-color:rgba(153, 204, 204, 1.00); width:900px; height:2000px">
		<canvas id="canvas" width="900" height="2000" style="position: absolute; display: block; background-color:rgba(153, 204, 204, 1.00);"></canvas>
		<div id="dom_overlay_container" style="pointer-events:none; overflow:hidden; width:900px; height:2000px; position: absolute; left: 0px; top: 0px; display: block;">
		</div>
	</div>
</body>
</html>

 

Am I missing something? Is it possible that there is no way to generate a file that allows the canvas to be bigger than the viewport?

 

 

TOPICS
Import and export , Other

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Adobe Community Professional ,
Apr 29, 2022 Apr 29, 2022

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Hi.

 

Try this:

image.png

 

But please keep in mind that this is just a workaround as content published by Animate in HTML5 Canvas documents are meant to be scaled like images or videos. If you want a truly responsive experience, like an app or website, you're gonna need to rewrite the scaling code that Animate generates in the published JS file and then position and scale each instance in your project as you were using CSS.

 

Please let us know if you need further assistance.

 

Regards,

JC

 

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