163 lines
5.4 KiB
HTML
163 lines
5.4 KiB
HTML
<!DOCTYPE html>
|
||
<html>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
||
<!-- Disable zooming: -->
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
|
||
|
||
<!-- TODO: read https://www.html5rocks.com/en/mobile/mobifying/#toc-meta-viewport -->
|
||
|
||
<head>
|
||
<title>Emigui – A experiment in an Immediate Mode GUI written in Rust</title>
|
||
<style>
|
||
html {
|
||
/* Remove touch delay: */
|
||
touch-action: manipulation;
|
||
}
|
||
|
||
body {
|
||
background: #000000;
|
||
}
|
||
|
||
html,
|
||
body {
|
||
overflow: hidden;
|
||
}
|
||
</style>
|
||
</head>
|
||
|
||
<body>
|
||
<script>
|
||
// The `--no-modules`-generated JS from `wasm-bindgen` attempts to use
|
||
// `WebAssembly.instantiateStreaming` to instantiate the wasm module,
|
||
// but this doesn't work with `file://` urls. This example is frequently
|
||
// viewed by simply opening `index.html` in a browser (with a `file://`
|
||
// url), so it would fail if we were to call this function!
|
||
//
|
||
// Work around this for now by deleting the function to ensure that the
|
||
// `no_modules.js` script doesn't have access to it. You won't need this
|
||
// hack when deploying over HTTP.
|
||
delete WebAssembly.instantiateStreaming;
|
||
</script>
|
||
|
||
<!-- this is the JS generated by the `wasm-bindgen` CLI tool -->
|
||
<script src="example.js"></script>
|
||
|
||
<script>
|
||
// we'll defer our execution until the wasm is ready to go
|
||
// here we tell bindgen the path to the wasm file so it can start
|
||
// initialization and return to us a promise when it's done
|
||
wasm_bindgen("./example_bg.wasm")
|
||
.then(on_wasm_loaded)["catch"](console.error);
|
||
// ----------------------------------------------------------------------------
|
||
var g_wasm_app = null;
|
||
|
||
function paint_gui(canvas, input) {
|
||
if (g_wasm_app === null) {
|
||
g_wasm_app = wasm_bindgen.new_webgl_gui("canvas", pixels_per_point());
|
||
}
|
||
wasm_bindgen.run_gui(g_wasm_app, JSON.stringify(input));
|
||
}
|
||
// ----------------------------------------------------------------------------
|
||
var g_mouse_pos = null;
|
||
var g_mouse_down = false;
|
||
|
||
function pixels_per_point() {
|
||
// return 1.0;
|
||
return window.devicePixelRatio || 1.0;
|
||
}
|
||
|
||
function auto_resize_canvas(canvas) {
|
||
canvas.style.width = window.innerWidth + "px";
|
||
canvas.style.height = window.innerHeight + "px";
|
||
canvas.width = window.innerWidth * pixels_per_point();
|
||
canvas.height = window.innerHeight * pixels_per_point();
|
||
}
|
||
|
||
function get_input(canvas) {
|
||
return {
|
||
mouse_down: g_mouse_down,
|
||
mouse_pos: g_mouse_pos,
|
||
screen_size: { x: window.innerWidth, y: window.innerHeight },
|
||
pixels_per_point: pixels_per_point(),
|
||
};
|
||
}
|
||
|
||
function mouse_pos_from_event(canvas, event) {
|
||
var rect = canvas.getBoundingClientRect();
|
||
return {
|
||
x: event.clientX - rect.left,
|
||
y: event.clientY - rect.top
|
||
};
|
||
}
|
||
|
||
function on_wasm_loaded() {
|
||
console.log("window.devicePixelRatio: " + window.devicePixelRatio);
|
||
var canvas = document.getElementById("canvas");
|
||
var repaint = function() {
|
||
auto_resize_canvas(canvas);
|
||
paint_gui(canvas, get_input(canvas));
|
||
};
|
||
|
||
canvas.addEventListener("mousedown", function(event) {
|
||
g_mouse_pos = mouse_pos_from_event(canvas, event);
|
||
g_mouse_down = true;
|
||
repaint();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("mousemove", function(event) {
|
||
g_mouse_pos = mouse_pos_from_event(canvas, event);
|
||
repaint();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("mouseup", function(event) {
|
||
g_mouse_pos = mouse_pos_from_event(canvas, event);
|
||
g_mouse_down = false;
|
||
repaint();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("mouseleave", function(event) {
|
||
g_mouse_pos = null;
|
||
repaint();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
|
||
canvas.addEventListener("touchstart", function(event) {
|
||
g_mouse_pos = { x: event.touches[0].pageX, y: event.touches[0].pageY };
|
||
g_mouse_down = true;
|
||
repaint();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("touchmove", function(event) {
|
||
g_mouse_pos = { x: event.touches[0].pageX, y: event.touches[0].pageY };
|
||
repaint();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
canvas.addEventListener("touchend", function(event) {
|
||
g_mouse_down = false;
|
||
repaint();
|
||
g_mouse_pos = null;
|
||
repaint();
|
||
event.stopPropagation();
|
||
event.preventDefault();
|
||
});
|
||
|
||
window.addEventListener("load", repaint);
|
||
window.addEventListener("pagehide", repaint);
|
||
window.addEventListener("pageshow", repaint);
|
||
window.addEventListener("resize", repaint);
|
||
// setInterval(repaint, 16);
|
||
repaint();
|
||
}
|
||
</script>
|
||
<!-- TODO: make this cover the entire screen, with resize and all -->
|
||
<canvas id="canvas" width="1024" height="1024"></canvas>
|
||
</body>
|
||
|
||
</html>
|