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Productionize PathKit

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- Remove some old API with VerbArgs that we didn't really like.
 - move from experimental/wasm -> experimental/pathkit and rename
wasm_main.cpp to pathkit_wasm_bindings (more descriptive).
 - Make compile.sh nicer to use (with some form of command line args).
 - Use MODULARIZE=1 to make this play nicer with other WASM libraries
and easier to import.
 - Add seperate ToCanvas() API
 - Move Region stuff behind the PATHKIT_TESTING flag (saves 100k on
binary size).
 - Add npm package for wasm version.  asm.js version should also be
supported for older browsers.
 - Remove shell.html, which was largely too complicated. Replace it with
example.html, which is more succinct and demos the more relevant APIs.

See https://www.npmjs.com/package/experimental-pathkit-wasm

Bug: skia:8216
Change-Id: I15f14dd8acd77331729998ae3e30d73e4b006761
Reviewed-on: https://skia-review.googlesource.com/144790
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
This commit is contained in:
Kevin Lubick 2018-08-02 11:30:33 -04:00 committed by Skia Commit-Bot
parent 8949c8a2f8
commit e1b36fe3e5
11 changed files with 545 additions and 716 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
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**/bin
node_modules/
package-lock.json

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build:
./compile.sh
npm:
mkdir -p ./npm-wasm/bin
mkdir -p ./npm-asmjs/bin
./compile.sh
cp ../../out/pathkit/pathkit.js ./npm-wasm/bin
cp ../../out/pathkit/pathkit.wasm ./npm-wasm/bin
#./compile.sh asm.js TODO
publish:
cd npm-wasm; npm publish
update-major:
cd npm-wasm; npm version major
echo "Don't forget to publish."
update-minor:
cd npm-wasm; npm version minor
echo "Don't forget to publish."
update-patch:
cd npm-wasm; npm version patch
echo "Don't forget to publish."
dev:
./compile.sh dev
dev-npm:
mkdir -p ./npm-wasm/bin
mkdir -p ./npm-asmjs/bin
./compile.sh dev
cp ../../out/pathkit/pathkit.js ./npm-wasm/bin
cp ../../out/pathkit/pathkit.wasm ./npm-wasm/bin
#./compile.sh asm.js TODO
example:
npm install experimental-pathkit-wasm
echo "Go check out localhost:8000/npm-wasm/example.html"
python serve.py

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PathKit WASM API
================
This library lets you use Skia's feature-rich PathOps API in the browser.
Compiling the source
--------------------
Download the [Enscriptem SDK](https://kripken.github.io/emscripten-site/docs/getting_started/downloads.html).
Set the EMSDK environment variable to the directory you installed it to.
Run `./experimental/pathkit/compile.sh` to compile a production, WASM build to `$SKIA_HOME/out/pathkit`.
Add "--help" for more options.

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@ -5,26 +5,62 @@
# found in the LICENSE file.
# Run this from $SKIA_HOME, not from the directory this file is in.
# This expects the environment variable EMSDK to be set
HTML_SHELL="./experimental/wasm/shell.html"
BASE_DIR=`cd $(dirname ${BASH_SOURCE[0]}) && pwd`
HTML_SHELL=$BASE_DIR/shell.html
BUILD_DIR="out/pathkit"
# This expects the environment variable EMSDK to be set
if [[ ! -d $EMSDK ]]; then
echo "Be sure to set the EMSDK environment variable."
exit 1
echo "Be sure to set the EMSDK environment variable."
exit 1
fi
# Navigate to SKIA_HOME from where this file is located.
pushd $BASE_DIR/../..
# Run this from $SKIA_HOME, not from the directory this file is in.
if [[ ! -d ./src ]]; then
echo "Cannot locate Skia source. Is the source checkout okay? Exiting."
exit 1
fi
if [[ $@ == *help* ]]; then
echo "By default, this script builds a production WASM build of PathKit."
echo ""
echo "This script takes several optional parameters:"
echo " dev = Make a build suitable for running tests or debugging"
echo " asm.js = Build for asm.js instead of WASM"
echo " serve = starts a webserver allowing a user to navigate to"
echo " localhost:8000/pathkit.html to view the demo page."
exit 0
fi
# Use -O0 for larger builds (but generally quicker)
# Use -Oz for (much slower, but smaller/faster) production builds
RELEASE_CONF="-Oz"
if [[ $@ == *dev* ]]; then
echo "Building a Debug/Testing build"
RELEASE_CONF="-O0 -s ASSERTIONS=1 -s DEMANGLE_SUPPORT=1 -g2 -DPATHKIT_TESTING"
fi
WASM_CONF="-s WASM=1"
if [[ $@ == *asm.js* ]]; then
echo "Building with asm.js instead of WASM"
WASM_CONF="-s WASM=0 -s ALLOW_MEMORY_GROWTH=1 --separate-asm"
fi
OUTPUT="-o $BUILD_DIR/pathkit.js"
source $EMSDK/emsdk_env.sh
echo "Compiling"
set -e
mkdir -p out/wasm
mkdir -p $BUILD_DIR
# Use -O0 for larger builds (but generally quicker)
# Use -Oz for (much slower, but smaller/faster) production builds
em++ -Oz -std=c++14 \
em++ $RELEASE_CONF -std=c++14 \
-Iinclude/config \
-Iinclude/core \
-Iinclude/gpu \
@ -36,13 +72,14 @@ em++ -Oz -std=c++14 \
-Isrc/shaders \
-Isrc/opts \
--bind \
-s WASM=1 \
$WASM_CONF \
-s MODULARIZE=1 \
-s EXPORT_NAME="PathKitInit" \
-s NO_EXIT_RUNTIME=1 \
-s ERROR_ON_UNDEFINED_SYMBOLS=1 \
-s ERROR_ON_MISSING_LIBRARIES=1 \
--shell-file $HTML_SHELL \
-o out/wasm/pathkit.html \
experimental/wasm/wasm_main.cpp \
$OUTPUT \
$BASE_DIR/pathkit_wasm_bindings.cpp \
src/core/SkAnalyticEdge.cpp \
src/core/SkArenaAlloc.cpp \
src/core/SkBlitter.cpp \
@ -74,15 +111,8 @@ src/ports/SkMemory_malloc.cpp \
src/utils/SkParse.cpp \
src/utils/SkParsePath.cpp
# Add the following for debugging (bloats production code size otherwise)
# list of all (most?) settings: https://github.com/kripken/emscripten/blob/incoming/src/settings.js
#-s ASSERTIONS=1 \
#-s DEMANGLE_SUPPORT=1 \
#-g2
if [[ $@ == *serve* ]]; then
pushd $BUILD_DIR
python serve.py
fi
# To build with ASM.js (instead of WASM)
# This doesn't give the same results as native c++ or wasm....
#-s WASM=0 \
#-s ALLOW_MEMORY_GROWTH=1 \
python -m SimpleHTTPServer 8000

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Copyright 2018 Google LLC
Licensed under the Apache License, Version 2.0 (the "License");
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@ -0,0 +1,54 @@
A WASM version of Skia's PathOps toolkit.
To use the library, run `npm install experimental-pathkit-wasm` and then simply include it:
<script src="/node_modules/experimental-pathkit-wasm/bin/pathkit.js"></script>
PathKitInit({
locateFile: (file) => '/node_modules/experimental-pathkit-wasm/bin/'+file,
}).then((PathKit) => {
// Code goes here using PathKit
});
PathKit comes in two parts, a JS loader and the actual WASM code. The JS loader creates
a global `PathKitInit` that can be called to load the WASM code. The `locateFile` function
is used to tell the JS loader where to find the .wasm file. By default, it will
look for /pathkit.wasm, so if this is not the case, use `locateFile` to configure
this properly.
The `PathKit` object returned through the .then() callback is fully loaded and ready to use.
See example.html for a fuller example of how to use the library.
Using PathKit and WebPack
-------------------------
WebPack's support for WASM is still somewhat experimental, but PathKit can be
used with a few configuration changes.
In the JS code, use require():
const PathKitInit = require('experimental-pathkit-wasm/bin/pathkit.js')
PathKitInit().then((PathKit) => {
// Code goes here using PathKit
})
Since WebPack does not expose the entire `/node_modules/` directory, but instead
packages only the needed pieces, we have to copy pathkit.wasm into the build directory.
One such solution is to use [CopyWebpackPlugin](https://github.com/webpack-contrib/copy-webpack-plugin)
For example, add the following plugin:
config.plugins.push(
new CopyWebpackPlugin([
{ from: 'node_modules/experimental-pathkit-wasm/bin/pathkit.wasm' }
])
);
If webpack gives an error similar to:
ERROR in ./node_modules/experimental-pathkit-wasm/bin/pathkit.js
Module not found: Error: Can't resolve 'fs' in '...'
Then, add the following configuration change to the node section of the config:
config.node = {
fs: 'empty'
};

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<!DOCTYPE html>
<title>PathKit (Skia + WASM)</title>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
svg, canvas {
border: 1px dashed #AAA;
}
canvas {
width: 200px;
height: 200px;
}
</style>
<svg id=svg xmlns='http://www.w3.org/2000/svg' width=200 height=200></svg>
<canvas id="canvas1"></canvas>
<canvas id="canvas2"></canvas>
<script type="text/javascript" src="/node_modules/experimental-pathkit-wasm/bin/pathkit.js"></script>
<script type="text/javascript" charset="utf-8">
PathKitInit({
locateFile: (file) => '/node_modules/experimental-pathkit-wasm/bin/'+file,
}).then((PathKit) => {
let firstPath = PathKit.FromSVGString('M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8zm.5-13H11v6l5.25 3.15.75-1.23-4.5-2.67z');
let secondPath = PathKit.NewPath();
// Acts somewhat like the Canvas API
secondPath.moveTo(1, 1);
secondPath.lineTo(20, 1);
secondPath.lineTo(10, 30);
secondPath.close();
let combinedPath = PathKit.ApplyPathOp(firstPath, secondPath, PathKit.PathOp.INTERSECT);
let simpleStr = PathKit.ToSVGString(combinedPath);
let newSVG = document.createElementNS('http://www.w3.org/2000/svg', 'path');
newSVG.setAttribute('stroke', 'rgb(0,0,200)');
newSVG.setAttribute('fill', 'white');
newSVG.setAttribute('transform', 'scale(5,5)');
newSVG.setAttribute('d', simpleStr);
document.getElementById('svg').appendChild(newSVG);
// Draw directly to Canvas
let ctx = document.getElementById('canvas1').getContext('2d');
ctx.strokeStyle = 'green';
ctx.fillStyle = 'white';
ctx.scale(8, 4);
ctx.beginPath();
PathKit.ToCanvas(combinedPath, ctx);
ctx.stroke();
// create Path2D object and use it in a Canvas.
let path2D = PathKit.ToPath2D(combinedPath);
ctx = document.getElementById('canvas2').getContext('2d');
ctx.scale(8, 4);
ctx.fillStyle = 'purple';
ctx.strokeStyle = 'orange';
ctx.fill(path2D);
ctx.stroke(path2D);
// clean up WASM memory
// See http://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/embind.html?highlight=memory#memory-management
firstPath.delete();
secondPath.delete();
combinedPath.delete();
});
</script>

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@ -0,0 +1,11 @@
{
"name": "experimental-pathkit-wasm",
"version": "0.0.4",
"description": "A WASM version of Skia's PathOps toolkit",
"main": "bin/pathkit.js",
"homepage": "https://github.com/google/skia/tree/master/experimental/pathkit",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"license": "Apache-2.0"
}

227
experimental/wasm/wasm_main.cpp → experimental/pathkit/pathkit_wasm_bindings.cpp
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@ -38,47 +38,9 @@ void VisitPath(const SkPath& p, VisitFunc&& f) {
}
}
void EMSCRIPTEN_KEEPALIVE SkPathToVerbsArgsArray(const SkPath& path,
emscripten::val /*Array*/ verbs,
emscripten::val /*Array*/ args) {
VisitPath(path, [&verbs, &args](SkPath::Verb verb, const SkPoint pts[4]) {
switch (verb) {
case SkPath::kMove_Verb:
verbs.call<void>("push", MOVE);
args.call<void>("push", pts[0].x(), pts[0].y());
break;
case SkPath::kLine_Verb:
verbs.call<void>("push", LINE);
args.call<void>("push", pts[1].x(), pts[1].y());
break;
case SkPath::kQuad_Verb:
verbs.call<void>("push", QUAD);
args.call<void>("push", pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y());
break;
case SkPath::kConic_Verb:
printf("unsupported conic verb\n");
// TODO(kjlubick): Port in the logic from SkParsePath::ToSVGString?
break;
case SkPath::kCubic_Verb:
verbs.call<void>("push", CUBIC);
args.call<void>("push",
pts[1].x(), pts[1].y(),
pts[2].x(), pts[2].y(),
pts[3].x(), pts[3].y());
break;
case SkPath::kClose_Verb:
verbs.call<void>("push", CLOSE);
break;
case SkPath::kDone_Verb:
SkASSERT(false);
break;
}
});
}
emscripten::val JSArray = emscripten::val::global("Array");
emscripten::val EMSCRIPTEN_KEEPALIVE SkPathToCmdArray(SkPath path) {
emscripten::val EMSCRIPTEN_KEEPALIVE ToCmds(SkPath path) {
val cmds = JSArray.new_();
VisitPath(path, [&cmds](SkPath::Verb verb, const SkPoint pts[4]) {
@ -125,62 +87,7 @@ emscripten::val EMSCRIPTEN_KEEPALIVE SkPathToCmdArray(SkPath path) {
// in our function type signatures. (this gives an error message like "Cannot call foo due to unbound
// types Pi, Pf"). But, we can just pretend they are numbers and cast them to be pointers and
// the compiler is happy.
SkPath EMSCRIPTEN_KEEPALIVE SkPathFromVerbsArgsTyped(uintptr_t /* uint8_t* */ vptr, int numVerbs,
uintptr_t /* float* */ aptr, int numArgs) {
const auto* verbs = reinterpret_cast<const uint8_t*>(vptr);
const auto* args = reinterpret_cast<const float*>(aptr);
SkPath path;
int argsIndex = 0;
float x1, y1, x2, y2, x3, y3;
// if there are not enough arguments, bail with the path we've constructed so far.
#define CHECK_NUM_ARGS(n) \
if ((argsIndex + n) > numArgs) { \
SkDebugf("Not enough args to match the verbs. Saw %d args\n", numArgs); \
return path; \
}
for(int i = 0; i < numVerbs; i++){
switch (verbs[i]) {
case MOVE:
CHECK_NUM_ARGS(2);
x1 = args[argsIndex++], y1 = args[argsIndex++];
path.moveTo(x1, y1);
break;
case LINE:
CHECK_NUM_ARGS(2);
x1 = args[argsIndex++], y1 = args[argsIndex++];
path.lineTo(x1, y1);
break;
case QUAD:
CHECK_NUM_ARGS(4);
x1 = args[argsIndex++], y1 = args[argsIndex++];
x2 = args[argsIndex++], y2 = args[argsIndex++];
path.quadTo(x1, y1, x2, y2);
break;
case CUBIC:
CHECK_NUM_ARGS(6);
x1 = args[argsIndex++], y1 = args[argsIndex++];
x2 = args[argsIndex++], y2 = args[argsIndex++];
x3 = args[argsIndex++], y3 = args[argsIndex++];
path.cubicTo(x1, y1, x2, y2, x3, y3);
break;
case CLOSE:
path.close();
break;
default:
SkDebugf(" path: UNKNOWN VERB %d, aborting dump...\n", verbs[i]);
return path;
}
}
#undef CHECK_NUM_ARGS
return path;
}
// See above comment for rational of pointer mess
SkPath EMSCRIPTEN_KEEPALIVE SkPathFromCmdTyped(uintptr_t /* float* */ cptr, int numCmds) {
SkPath EMSCRIPTEN_KEEPALIVE FromCmds(uintptr_t /* float* */ cptr, int numCmds) {
const auto* cmds = reinterpret_cast<const float*>(cptr);
SkPath path;
float x1, y1, x2, y2, x3, y3;
@ -231,6 +138,10 @@ SkPath EMSCRIPTEN_KEEPALIVE SkPathFromCmdTyped(uintptr_t /* float* */ cptr, int
return path;
}
SkPath EMSCRIPTEN_KEEPALIVE NewPath() {
return SkPath();
}
//========================================================================================
// SVG THINGS
//========================================================================================
@ -278,36 +189,43 @@ SkPath EMSCRIPTEN_KEEPALIVE ResolveBuilder(SkOpBuilder builder) {
// Canvas THINGS
//========================================================================================
emscripten::val EMSCRIPTEN_KEEPALIVE ToPath2D(SkPath path, val/* Path2D&*/ retVal) {
void EMSCRIPTEN_KEEPALIVE ToCanvas(SkPath path, val/* Path2D or Canvas*/ ctx) {
SkPath::Iter iter(path, false);
SkPoint pts[4];
SkPath::Verb verb;
while ((verb = iter.next(pts, false)) != SkPath::kDone_Verb) {
switch (verb) {
case SkPath::kMove_Verb:
retVal.call<void>("moveTo", pts[0].x(), pts[0].y());
ctx.call<void>("moveTo", pts[0].x(), pts[0].y());
break;
case SkPath::kLine_Verb:
retVal.call<void>("lineTo", pts[1].x(), pts[1].y());
ctx.call<void>("lineTo", pts[1].x(), pts[1].y());
break;
case SkPath::kQuad_Verb:
retVal.call<void>("quadraticCurveTo", pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y());
ctx.call<void>("quadraticCurveTo", pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y());
break;
case SkPath::kConic_Verb:
printf("unsupported conic verb\n");
// TODO(kjlubick): Port in the logic from SkParsePath::ToSVGString?
break;
case SkPath::kCubic_Verb:
retVal.call<void>("bezierCurveTo", pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y(),
ctx.call<void>("bezierCurveTo", pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y(),
pts[3].x(), pts[3].y());
break;
case SkPath::kClose_Verb:
retVal.call<void>("closePath");
ctx.call<void>("closePath");
break;
case SkPath::kDone_Verb:
break;
}
}
}
emscripten::val JSPath2D = emscripten::val::global("Path2D");
emscripten::val EMSCRIPTEN_KEEPALIVE ToPath2D(SkPath path) {
val retVal = JSPath2D.new_();
ToCanvas(path, retVal);
return retVal;
}
@ -315,11 +233,13 @@ emscripten::val EMSCRIPTEN_KEEPALIVE ToPath2D(SkPath path, val/* Path2D&*/ retVa
// Region things
//========================================================================================
#ifdef PATHKIT_TESTING
SkPath GetBoundaryPathFromRegion(SkRegion region) {
SkPath p;
region.getBoundaryPath(&p);
return p;
}
#endif
// Binds the classes to the JS
EMSCRIPTEN_BINDINGS(skia) {
@ -335,14 +255,69 @@ EMSCRIPTEN_BINDINGS(skia) {
.function("cubicTo",
select_overload<void(SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar)>(&SkPath::cubicTo))
.function("close", &SkPath::close)
// Uncomment below for debugging.
.function("dump", select_overload<void() const>(&SkPath::dump));
#ifdef PATHKIT_TESTING
.function("dump", select_overload<void() const>(&SkPath::dump))
#endif
;
class_<SkOpBuilder>("SkOpBuilder")
.constructor<>()
.function("add", &SkOpBuilder::add);
// Without these function() bindings, the function would be exposed but oblivious to
// our types (e.g. SkPath)
// Import
function("FromSVGString", &FromSVGString);
function("FromCmds", &FromCmds);
function("NewPath", &NewPath);
// Path2D is opaque, so we can't read in from it.
// Export
function("ToPath2D", &ToPath2D);
function("ToCanvas", &ToCanvas);
function("ToSVGString", &ToSVGString);
function("ToCmds", &ToCmds);
// PathOps
function("SimplifyPath", &SimplifyPath);
function("ApplyPathOp", &ApplyPathOp);
function("ResolveBuilder", &ResolveBuilder);
enum_<SkPathOp>("PathOp")
.value("DIFFERENCE", SkPathOp::kDifference_SkPathOp)
.value("INTERSECT", SkPathOp::kIntersect_SkPathOp)
.value("UNION", SkPathOp::kUnion_SkPathOp)
.value("XOR", SkPathOp::kXOR_SkPathOp)
.value("REVERSE_DIFFERENCE", SkPathOp::kReverseDifference_SkPathOp);
constant("MOVE_VERB", MOVE);
constant("LINE_VERB", LINE);
constant("QUAD_VERB", QUAD);
constant("CUBIC_VERB", CUBIC);
constant("CLOSE_VERB", CLOSE);
// coming soon - Stroke
// coming soon - Matrix
// coming soon - Bounds/Trim
#ifdef PATHKIT_TESTING
function("SkBits2Float", &SkBits2Float);
function("GetBoundaryPathFromRegion", &GetBoundaryPathFromRegion);
enum_<SkRegion::Op>("RegionOp")
.value("DIFFERENCE", SkRegion::Op::kDifference_Op)
.value("INTERSECT", SkRegion::Op::kIntersect_Op)
.value("UNION", SkRegion::Op::kUnion_Op)
.value("XOR", SkRegion::Op::kXOR_Op)
.value("REVERSE_DIFFERENCE", SkRegion::Op::kReverseDifference_Op)
.value("REPLACE", SkRegion::Op::kReplace_Op);
class_<SkRegion>("SkRegion")
.constructor<>()
@ -354,48 +329,6 @@ EMSCRIPTEN_BINDINGS(skia) {
.function("opRegion",
select_overload<bool(const SkRegion&, SkRegion::Op)>(&SkRegion::op))
.function("opRegionAB",
select_overload<bool(const SkRegion&, const SkRegion&, SkRegion::Op)>(&SkRegion::op))
;
// Without this, module._ToPath2D (yes with an underscore)
// would be exposed, but be unable to correctly handle the SkPath type.
function("ToPath2D", &ToPath2D);
function("ToSVGString", &ToSVGString);
function("FromSVGString", &FromSVGString);
function("SkPathToVerbsArgsArray", &SkPathToVerbsArgsArray);
function("SkPathFromVerbsArgsTyped", &SkPathFromVerbsArgsTyped);
function("SkPathFromCmdTyped", &SkPathFromCmdTyped);
function("SkPathToCmdArray", &SkPathToCmdArray);
function("SimplifyPath", &SimplifyPath);
function("ApplyPathOp", &ApplyPathOp);
function("ResolveBuilder", &ResolveBuilder);
function("SkBits2Float", &SkBits2Float);
function("GetBoundaryPathFromRegion", &GetBoundaryPathFromRegion);
enum_<SkPathOp>("PathOp")
.value("DIFFERENCE", SkPathOp::kDifference_SkPathOp)
.value("INTERSECT", SkPathOp::kIntersect_SkPathOp)
.value("UNION", SkPathOp::kUnion_SkPathOp)
.value("XOR", SkPathOp::kXOR_SkPathOp)
.value("REVERSE_DIFFERENCE", SkPathOp::kReverseDifference_SkPathOp);
enum_<SkRegion::Op>("RegionOp")
.value("DIFFERENCE", SkRegion::Op::kDifference_Op)
.value("INTERSECT", SkRegion::Op::kIntersect_Op)
.value("UNION", SkRegion::Op::kUnion_Op)
.value("XOR", SkRegion::Op::kXOR_Op)
.value("REVERSE_DIFFERENCE", SkRegion::Op::kReverseDifference_Op)
.value("REPLACE", SkRegion::Op::kReplace_Op);
constant("MOVE_VERB", MOVE);
constant("LINE_VERB", LINE);
constant("QUAD_VERB", QUAD);
constant("CUBIC_VERB", CUBIC);
constant("CLOSE_VERB", CLOSE);
select_overload<bool(const SkRegion&, const SkRegion&, SkRegion::Op)>(&SkRegion::op));
#endif
}

20
experimental/pathkit/serve.py Normal file
View File

@ -0,0 +1,20 @@
# Copyright 2018 Google LLC
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import SimpleHTTPServer
import SocketServer
PORT = 8000
class Handler(SimpleHTTPServer.SimpleHTTPRequestHandler):
pass
Handler.extensions_map['.js'] = 'application/javascript'
# Without the correct MIME type, async compilation doesn't work
Handler.extensions_map['.wasm'] = 'application/wasm'
httpd = SocketServer.TCPServer(("", PORT), Handler)
httpd.serve_forever()

545
experimental/wasm/shell.html
View File

@ -1,545 +0,0 @@
<!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
&nbsp;&nbsp;&nbsp;
<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, "&amp;");
//text = text.replace(/</g, "&lt;");
//text = text.replace(/>/g, "&gt;");
//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>