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Switch code to SDL2.

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Also simplify wasm html (now that it is suppported by all browsers).

Change-Id: I352b08594b93d3dd7d44832d4328b3546ccc1b90
This commit is contained in:
Vincent Rabaud
2023-09-28 10:18:23 +02:00
parent a429c0de64
commit 24d7f9cb6e
7 changed files with 83 additions and 120 deletions
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48
webp_js/index_wasm.html
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@ -9,6 +9,7 @@
noInitialRun : true
};
</script>
<script src="./webp_wasm.js"></script>
<script type="text/javascript">
'use strict';
@ -16,40 +17,25 @@
// main wrapper for the function decoding a WebP into a canvas object
var WebpToCanvas;
function init() {
var xhr = new XMLHttpRequest();
xhr.open('GET', 'webp_wasm.wasm', true);
xhr.responseType = 'arraybuffer';
xhr.onload = function() {
Module.wasmBinary = xhr.response;
var script = document.createElement('script');
script.src = "webp_wasm.js";
document.body.appendChild(script);
};
xhr.send(null);
}
window.onload = init;
Module.onRuntimeInitialized = async () => {
// wrapper for the function decoding a WebP into a canvas object
WebpToCanvas = Module.cwrap('WebPToSDL', 'number', ['array', 'number']);
};
function decode(webp_data, canvas_id) {
var result;
if (Module["asm"] != undefined) {
// wrapper for the function decoding a WebP into a canvas object
WebpToCanvas = Module.cwrap('WebPToSDL', 'number', ['array', 'number']);
// get the canvas to decode into
var canvas = document.getElementById(canvas_id);
if (canvas == null) return;
// clear previous picture (if any)
Module.canvas = canvas;
canvas.getContext('2d').clearRect(0, 0, canvas.width, canvas.height);
// decode and measure timing
var start = new Date();
var ret = WebpToCanvas(webp_data, webp_data.length);
var end = new Date();
var decode_time = end - start;
result = 'decoding time: ' + decode_time +' ms.';
} else {
result = "WASM module not finished loading! Please retry";
}
// get the canvas to decode into
var canvas = document.getElementById(canvas_id);
if (canvas == null) return;
// clear previous picture (if any)
Module.canvas = canvas;
canvas.getContext('2d').clearRect(0, 0, canvas.width, canvas.height);
// decode and measure timing
var start = new Date();
var ret = WebpToCanvas(webp_data, webp_data.length);
var end = new Date();
var decodeTime = end - start;
result = 'decoding time: ' + decodeTime +' ms.';
// display timing result
var speed_result = document.getElementById('timing');
if (speed_result != null) {