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<!doctype html>
<html lang="en-us">
<head>
<meta charset="utf-8">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Skia and WASM</title>
<style>
.emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
textarea.emscripten { font-family: monospace; width: 80%; }
div.emscripten { text-align: center; }
div.emscripten_border { border: 1px solid black; }
/* the canvas *must not* have any border or padding, or mouse coords will be wrong */
canvas.emscripten { border: 0px none; background-color: black; }
.spinner {
height: 50px;
width: 50px;
margin: 0px auto;
-webkit-animation: rotation .8s linear infinite;
-moz-animation: rotation .8s linear infinite;
-o-animation: rotation .8s linear infinite;
animation: rotation 0.8s linear infinite;
border-left: 10px solid rgb(0,150,240);
border-right: 10px solid rgb(0,150,240);
border-bottom: 10px solid rgb(0,150,240);
border-top: 10px solid rgb(100,0,200);
border-radius: 100%;
background-color: rgb(200,100,250);
}
@-webkit-keyframes rotation {
from {-webkit-transform: rotate(0deg);}
to {-webkit-transform: rotate(360deg);}
}
@-moz-keyframes rotation {
from {-moz-transform: rotate(0deg);}
to {-moz-transform: rotate(360deg);}
}
@-o-keyframes rotation {
from {-o-transform: rotate(0deg);}
to {-o-transform: rotate(360deg);}
}
@keyframes rotation {
from {transform: rotate(0deg);}
to {transform: rotate(360deg);}
}
</style>
</head>
<body>
<hr/>
<figure style="overflow:visible;" id="spinner"><div class="spinner"></div><center style="margin-top:0.5em"><strong>emscripten</strong></center></figure>
<div class="emscripten" id="status">Downloading...</div>
<div class="emscripten">
<progress value="0" max="100" id="progress" hidden=1></progress>
</div>
<div class="emscripten_border">
<canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
</div>
<svg id=svg xmlns='http://www.w3.org/2000/svg' width=50 height=50 viewPort='0 0 50 50'>
</svg>
<hr/>
<div class="emscripten">
<input type="checkbox" id="resize">Resize canvas
<input type="checkbox" id="pointerLock" checked>Lock/hide mouse pointer
<input type="button" value="Fullscreen" onclick="Module.requestFullscreen(document.getElementById('pointerLock').checked,
document.getElementById('resize').checked)">
</div>
<hr/>
<textarea class="emscripten" id="output" rows="8"></textarea>
<hr>
<script type='text/javascript'>
function entryPoint() {
// See https://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#call-compiled-c-c-code-directly-from-javascript
const FAST_TIMES = 100 + 11 /*warmups*/;
const SLOW_TIMES = 10 + 11 /*warmups*/;
var path;
for (let i = 0; i< FAST_TIMES; i++){
if (i === 10) {
// let it "warm up"
console.time('Path_with_calls'); // about 3.9s for 1M iterations
}
path = new Module.SkPath();
path.moveTo(0,0);
path.lineTo(40,0);
path.lineTo(20,20);
path.close();
path.moveTo(20,0);
path.lineTo(60,0);
path.lineTo(40,20);
path.close();
if (i < FAST_TIMES - 1) {
path.delete();
}
}
console.timeEnd('Path_with_calls');
var result;
for(let i = 0; i < SLOW_TIMES; i++) {
if (i === 10) {
console.time('simplify'); // about 5.4s for 100k iterations
}
result = Module.SimplifyPath(path);
if (i < SLOW_TIMES - 1) {
result.delete();
}
}
console.timeEnd('simplify');
var p2d;
for(let i = 0; i < FAST_TIMES; i++) {
if (i === 10) {
console.time('ToPath2D'); // about 6.3s for 1M iterations
}
p2d = Module.ToPath2D(result, new Path2D());
}
console.timeEnd('ToPath2D');
let ctx = Module.canvas.getContext('2d')
ctx.strokeStyle = 'red';
ctx.stroke(p2d);
var svgPtr;
for(let i=0; i < FAST_TIMES; i++) {
if (i === 10) {
console.time('ToSVGString (simple)'); // about 7.1s for 1M iterations
}
svgPtr = Module.ToSVGString(result);
}
console.timeEnd('ToSVGString (simple)');
Module.print('Got SVG Data: ' + svgPtr);
var mountains;
for(let i=0; i < FAST_TIMES; i++) {
if (i === 10) {
console.time('FromSVGString (simple)');
}
mountains = Module.FromSVGString(svgPtr);
if (i < FAST_TIMES - 1) {
mountains.delete();
}
}
console.timeEnd('FromSVGString (simple)');
path.delete();
result.delete();
mountains.delete();
//==============================================================================
function uint8TypedArray(arr) {
const ta = new Uint8ClampedArray(arr.length);
for (let i = 0; i < arr.length; i++){
ta[i] = arr[i];
}
retVal = Module._malloc(ta.length * ta.BYTES_PER_ELEMENT);
Module.HEAPU8.set(ta, retVal / ta.BYTES_PER_ELEMENT);
return retVal;
}
function floatTypedArray(arr) {
const ta = new Float32Array(arr.length);
for (let i = 0; i < arr.length; i++){
ta[i] = arr[i];
}
retVal = Module._malloc(ta.length * ta.BYTES_PER_ELEMENT);
Module.HEAPF32.set(ta, retVal / ta.BYTES_PER_ELEMENT);
return retVal;
}
var path4;
for (let i = 0; i< FAST_TIMES; i++) {
if (i === 10) {
console.time('path_with_typed_array'); // about 3.6s for 1M iterations
}
let verbs = [];
let args = [];
verbs.push(Module.MOVE_VERB);
args.push(100); args.push(0);
verbs.push(Module.LINE_VERB);
args.push(140); args.push(0);
verbs.push(Module.LINE_VERB);
args.push(120); args.push(20);
verbs.push(Module.CLOSE_VERB);
verbs.push(Module.MOVE_VERB);
args.push(120); args.push(0);
verbs.push(Module.LINE_VERB);
args.push(160); args.push(0);
verbs.push(Module.LINE_VERB);
args.push(140); args.push(20);
verbs.push(Module.CLOSE_VERB);
let tVerbs = uint8TypedArray(verbs);
let tArgs = floatTypedArray(args);
path4 = Module.SkPathFromVerbsArgsTyped(tVerbs, verbs.length,
tArgs, args.length);
if (i < FAST_TIMES - 1) {
path4.delete();
}
Module._free(tVerbs);
Module._free(tArgs);
}
console.timeEnd('path_with_typed_array');
//path4.dump();
var v4, a4;
for (let i = 0; i< FAST_TIMES; i++) {
if (i === 10) {
console.time('to_verbs_args_array'); // about 5.4s for 1M iterations
}
v4 = [];
a4 = [];
Module.SkPathToVerbsArgsArray(path4, v4, a4);
}
console.timeEnd('to_verbs_args_array');
Module.print(`Got path with ${v4.length} verbs and ${a4.length} args`);
Module.print(v4[0] + ' (0 for value is MoveTo, 1 for LineTo, etc)');
Module.print(a4[0], a4[1] + ' (coordinates)');
path4.delete();
//==============================================================================
let p1 = new Module.SkPath();
p1.moveTo(0,60);
p1.lineTo(40,60);
p1.lineTo(20,80);
p1.close();
let p2 = new Module.SkPath();
p2.moveTo(20,60);
p2.lineTo(60,60);
p2.lineTo(40,80);
p2.close();
var p3;
for (let i = 0; i< SLOW_TIMES; i++) {
if (i === 10) {
console.time('ApplyPathOp'); // about 5.2s for 100k iterations
}
p3 = Module.ApplyPathOp(p1, p2, Module.PathOp.INTERSECT);
if (i < SLOW_TIMES - 1) {
p3.delete();
}
}
console.timeEnd('ApplyPathOp');
ctx = Module.canvas.getContext('2d');
ctx.strokeStyle = 'green';
// Alternative way to use Path2D (potentially for browsers that
// don't support the Path2D?)
ctx.beginPath();
Module.ToPath2D(p3, ctx);
ctx.stroke();
var builder, p4;
for (let i = 0; i< SLOW_TIMES; i++) {
if (i === 10) {
console.time('PathOpBuilder'); // about 12.3s for 100k iterations
}
builder = new Module.SkOpBuilder();
builder.add(p1, Module.PathOp.UNION);
builder.add(p2, Module.PathOp.UNION);
builder.add(p3, Module.PathOp.DIFFERENCE);
p4 = Module.ResolveBuilder(builder);
if (i < SLOW_TIMES - 1) {
p4.delete();
}
builder.delete();
}
console.timeEnd('PathOpBuilder');
p2d = Module.ToPath2D(p4, new Path2D());
ctx = Module.canvas.getContext('2d');
ctx.fillStyle = 'purple';
ctx.strokeStyle = 'white';
ctx.fill(p2d);
ctx.stroke(p2d);
p1.delete();
p2.delete();
p3.delete();
p4.delete();
//=====================================================================================
function floatTypedArrayFrom2D(arr) {
// expects 2d array where index 0 is verb and index 1-n are args
let len = 0;
for (cmd of arr) {
len += cmd.length;
}
const ta = new Float32Array(len);
let i = 0;
for (cmd of arr) {
for (c of cmd) {
ta[i] = c;
i++;
}
}
retVal = Module._malloc(ta.length * ta.BYTES_PER_ELEMENT);
Module.HEAPF32.set(ta, retVal / ta.BYTES_PER_ELEMENT);
return [retVal, len];
}
function SkPathFromCmdTyped(cmdArr) {
let [cmd, len] = floatTypedArrayFrom2D(cmdArr);
let path = Module.SkPathFromCmdTyped(cmd, len);
Module._free(cmd);
return path;
}
var path5;
for (let i = 0; i< FAST_TIMES; i++) {
if (i === 10) {
console.time('path_cmd_typed (simple)'); // about 4.6s for 1M iterations
}
let commands = [];
commands.push([Module.MOVE_VERB, 100, 60]);
commands.push([Module.LINE_VERB, 140, 60]);
commands.push([Module.LINE_VERB, 120, 80]);
commands.push([Module.CLOSE_VERB]);
commands.push([Module.MOVE_VERB, 120, 60]);
commands.push([Module.LINE_VERB, 160, 60]);
commands.push([Module.LINE_VERB, 140, 80]);
commands.push([Module.CLOSE_VERB]);
path5 = SkPathFromCmdTyped(commands);
if (i < FAST_TIMES - 1) {
path5.delete();
}
}
console.timeEnd('path_cmd_typed (simple)');
p2d = Module.ToPath2D(path5, new Path2D());
ctx = Module.canvas.getContext('2d');
ctx.fillStyle = 'white';
ctx.fill(p2d);
var cmd5;
for (let i = 0; i< FAST_TIMES; i++) {
if (i === 10) {
console.time('to_cmd_array'); // about 9.1s for 1M iterations
}
cmd5 = Module.SkPathToCmdArray(path5);
}
console.timeEnd('to_cmd_array');
Module.print(`Got path with ${cmd5.length} commands`);
Module.print(cmd5[0][0] + ' (0 for value is MoveTo, 1 for LineTo, etc)');
Module.print(cmd5[0][1], cmd5[0][2] + ' (coordinates)');
//console.log(cmd5);
path5.delete();
//==========================================================
const svgPath = 'M6 18c0 .55.45 1 1 1h1v3.5c0 .83.67 1.5 1.5 1.5s1.5-.67 1.5-1.5V19h2v3.5c0 .83.67 1.5 1.5 1.5s1.5-.67 1.5-1.5V19h1c.55 0 1-.45 1-1V8H6v10zM3.5 8C2.67 8 2 8.67 2 9.5v7c0 .83.67 1.5 1.5 1.5S5 17.33 5 16.5v-7C5 8.67 4.33 8 3.5 8zm17 0c-.83 0-1.5.67-1.5 1.5v7c0 .83.67 1.5 1.5 1.5s1.5-.67 1.5-1.5v-7c0-.83-.67-1.5-1.5-1.5zm-4.97-5.84l1.3-1.3c.2-.2.2-.51 0-.71-.2-.2-.51-.2-.71 0l-1.48 1.48C13.85 1.23 12.95 1 12 1c-.96 0-1.86.23-2.66.63L7.85.15c-.2-.2-.51-.2-.71 0-.2.2-.2.51 0 .71l1.31 1.31C6.97 3.26 6 5.01 6 7h12c0-1.99-.97-3.75-2.47-4.84zM10 5H9V4h1v1zm5 0h-1V4h1v1z';
var android;
for(let i=0; i < SLOW_TIMES; i++) {
if (i === 10) {
console.time('FromSVGString (moderate)'); // about 6.8s for 100k iterations
}
android = Module.FromSVGString(svgPath);
if (i < SLOW_TIMES - 1) {
android.delete();
}
}
console.timeEnd('FromSVGString (moderate)');
result = Module.SimplifyPath(android);
//result.dump();
let androidSimple = Module.ToSVGString(result);
let newPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');
newPath.setAttribute('fill', 'rgb(0,200,0)');
newPath.setAttribute('d', androidSimple);
document.getElementById('svg').appendChild(newPath);
androidCMDs = Module.SkPathToCmdArray(android);
android.delete();
result.delete();
var android2;
for (let i = 0; i< FAST_TIMES; i++) {
if (i === 10) {
console.time('path_cmd_typed (moderate)'); // about 2.2s for 100k
}
android2 = SkPathFromCmdTyped(androidCMDs);
if (i < FAST_TIMES - 1) {
android2.delete();
}
}
console.timeEnd('path_cmd_typed (moderate)');
var android2Str;
for(let i=0; i < SLOW_TIMES; i++) {
if (i === 10) {
console.time('ToSVGString (moderate)');
}
android2Str = Module.ToSVGString(android2);
}
console.timeEnd('ToSVGString (moderate)');
newPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');
newPath.setAttribute('fill', 'rgb(0,0,200)');
newPath.setAttribute('d', android2Str);
newPath.setAttribute('transform', 'translate(25 0)');
document.getElementById('svg').appendChild(newPath);
android2.delete();
// ===========================================================
let float = Module.SkBits2Float(parseInt("0x3f2aaaab"));
Module.print('SkBits2Float(0x3f2aaaab) = 0.666667', float);
p1 = new Module.SkPath();
p1.moveTo(0,60);
p1.lineTo(40,60);
p1.lineTo(20,80);
p1.close();
p2 = new Module.SkPath();
p2.moveTo(20,60);
p2.lineTo(60,60);
p2.lineTo(40,80);
p2.close();
let rgnA = new Module.SkRegion();
let rgnB = new Module.SkRegion();
let openClip = new Module.SkRegion();
let rgnOut = new Module.SkRegion();
openClip.setRect(-16000, -16000, 16000, 16000);
rgnA.setPath(p1, openClip);
rgnB.setPath(p2, openClip);
rgnOut.opRegionAB(rgnA, rgnB, Module.RegionOp.INTERSECT);
let pathOut = Module.GetBoundaryPathFromRegion(rgnOut);
p1.delete();
p2.delete();
rgnA.delete();
rgnB.delete();
openClip.delete();
rgnOut.delete();
pathOut.delete();
}
</script>
<script type='text/javascript'>
var statusElement = document.getElementById('status');
var progressElement = document.getElementById('progress');
var spinnerElement = document.getElementById('spinner');
var Module = {
preRun: [],
postRun: [entryPoint],
print: (function() {
var element = document.getElementById('output');
if (element) element.value = ''; // clear browser cache
return function(text) {
if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
// These replacements are necessary if you render to raw HTML
//text = text.replace(/&/g, "&");
//text = text.replace(/</g, "<");
//text = text.replace(/>/g, ">");
//text = text.replace('\n', '<br>', 'g');
console.log(text);
if (element) {
element.value += text + "\n";
element.scrollTop = element.scrollHeight; // focus on bottom
}
};
})(),
printErr: function(text) {
if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
if (0) { // XXX disabled for safety typeof dump == 'function') {
dump(text + '\n'); // fast, straight to the real console
} else {
console.error(text);
}
},
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;
})(),
setStatus: function(text) {
if (!Module.setStatus.last) Module.setStatus.last = { time: Date.now(), text: '' };
if (text === Module.setStatus.last.text) return;
var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
var now = Date.now();
if (m && now - Module.setStatus.last.time < 30) return; // if this is a progress update, skip it if too soon
Module.setStatus.last.time = now;
Module.setStatus.last.text = text;
if (m) {
text = m[1];
progressElement.value = parseInt(m[2])*100;
progressElement.max = parseInt(m[4])*100;
progressElement.hidden = false;
spinnerElement.hidden = false;
} else {
progressElement.value = null;
progressElement.max = null;
progressElement.hidden = true;
if (!text) spinnerElement.hidden = true;
}
statusElement.innerHTML = text;
},
totalDependencies: 0,
monitorRunDependencies: function(left) {
this.totalDependencies = Math.max(this.totalDependencies, left);
Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
}
};
Module.setStatus('Downloading...');
window.onerror = function() {
Module.setStatus('Exception thrown, see JavaScript console');
spinnerElement.style.display = 'none';
Module.setStatus = function(text) {
if (text) Module.printErr('[post-exception status] ' + text);
};
};
</script>
{{{ SCRIPT }}}
</body>
</html>
|
