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overhaul template to fix resize issues #383

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overhaul template to fix resize issues #383

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0b0412b
overhaul template to fix resize issues
Moros1138 Sep 12, 2024
e8544c0
viewport tag to ensure a decent mobile ux (good catch, Ciaran)
Moros1138 Sep 12, 2024
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145 changes: 74 additions & 71 deletions tools/wasm/basic_template.html
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Original file line number Diff line number Diff line change
@@ -1,77 +1,80 @@

<!doctype html>
<html lang="en-us">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Emscripten-Generated Code</title>
<style>
html,body { width: 100%; height: 100%; }
body { font-family: arial; margin: 0; padding: 0; background: #000; }

.emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
div.emscripten_border { border: none; }

/* the canvas *must not* have any border or padding, or mouse coords will be wrong */
canvas.emscripten { border: 0px none; background-color: black; }
</style>
</head>
<body>
<canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()" tabindex=-1></canvas>
<script type='text/javascript'>
var Module = {
preRun: [],
postRun: [],
canvas: (function() {
var canvas = document.getElementById('canvas');

// As a default initial behavior, pop up an alert when webgl context is lost. To make your
// application robust, you may want to override this behavior before shipping!
// See http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15.2
canvas.addEventListener("webglcontextlost", function(e) { alert('WebGL context lost. You will need to reload the page.'); e.preventDefault(); }, false);

return canvas;
})(),
};
</script>
<script async type="text/javascript" src="./pge.js"></script>
<script type="text/javascript">
Module.canvas.addEventListener("resize", (e) => {

var viewWidth = e.detail.width;
var viewHeight = e.detail.width / Module._olc_WindowAspectRatio;

if(viewHeight > e.detail.height)
{
viewHeight = e.detail.height;
viewWidth = e.detail.height * Module._olc_WindowAspectRatio;
}

// update dom attributes
Module.canvas.setAttribute("width", viewWidth);
Module.canvas.setAttribute("height", viewHeight);

var top = (e.detail.height - viewHeight) / 2;
var left = (e.detail.width - viewWidth) / 2;

// update styles
Module.canvas.style.position = "fixed";
Module.canvas.style.top = top.toString() + "px";
Module.canvas.style.left = left.toString() + "px";
Module.canvas.style.width = "";
Module.canvas.style.height = "";

// trigger PGE update
Module._olc_PGE_UpdateWindowSize(viewWidth, viewHeight);
<head>
<meta charset="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Emscripten-Generated Code</title>
<style>
html,
body {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
body {
font-family: arial;
background: #000;
color: #ded;
overflow: hidden;
display: flex;
align-items: center;
justify-items: center;
justify-content: center;
}
#container {
position: fixed;
display: flex;
justify-content: center;
align-items: center;
top: 0;
left: 0;
right: 0;
bottom: 0;
}
#canvas {
display: block;
border: 0px none;
background-color: black;
margin: 0 auto;
}
#canvas:focus {
outline: none;
}
</style>
</head>

// ensure canvas has focus
Module.canvas.focus();
e.preventDefault();
});
</script>
<body>
<div id="container">
<canvas id="canvas" oncontextmenu="event.preventDefault()" tabindex=-1></canvas>
</div>
<script type='text/javascript'>
var Module = {
print: (function () {
return (...args) => {
var text = args.join(' ');
console.log(text);
};
})(),
canvas: (() => {
var canvas = document.getElementById('canvas');

</body>
</html>
// As a default initial behavior, pop up an alert when webgl context is lost. To make your
// application robust, you may want to override this behavior before shipping!
// See http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15.2
canvas.addEventListener("webglcontextlost", (e) => { alert('WebGL context lost. You will need to reload the page.'); e.preventDefault(); }, false);

return canvas;
})(),
setStatus: (text) => {
},
totalDependencies: 0,
monitorRunDependencies: (left) => {
}
};
</script>
{{{ SCRIPT }}}
</body>

</html>