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/*
* Copyright 2018 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#if SK_SUPPORT_GPU
#include "GrBackendSurface.h"
#include "GrContext.h"
#include "GrGLInterface.h"
#include "GrGLTypes.h"
#endif
#include "SkBlendMode.h"
#include "SkBlurTypes.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkCornerPathEffect.h"
#include "SkDashPathEffect.h"
#include "SkData.h"
#include "SkDiscretePathEffect.h"
#include "SkEncodedImageFormat.h"
#include "SkFilterQuality.h"
#include "SkFontMgr.h"
#include "SkFontMgrPriv.h"
#include "SkGradientShader.h"
#include "SkImage.h"
#include "SkImageInfo.h"
#include "SkImageShader.h"
#include "SkMakeUnique.h"
#include "SkMaskFilter.h"
#include "SkPaint.h"
#include "SkParsePath.h"
#include "SkPath.h"
#include "SkPathEffect.h"
#include "SkPathOps.h"
#include "SkScalar.h"
#include "SkShader.h"
#include "SkShadowUtils.h"
#include "SkString.h"
#include "SkStrokeRec.h"
#include "SkSurface.h"
#include "SkSurfaceProps.h"
#include "SkTestFontMgr.h"
#include "SkTrimPathEffect.h"
#include "SkVertices.h"
#if SK_INCLUDE_SKOTTIE
#include "Skottie.h"
#if SK_INCLUDE_MANAGED_SKOTTIE
#include "SkottieProperty.h"
#include "SkottieUtils.h"
#endif // SK_INCLUDE_MANAGED_SKOTTIE
#endif // SK_INCLUDE_SKOTTIE
#include <iostream>
#include <string>
#include <emscripten.h>
#include <emscripten/bind.h>
#if SK_SUPPORT_GPU
#include <GL/gl.h>
#include <emscripten/html5.h>
#endif
using namespace emscripten;
// Self-documenting types
using JSArray = emscripten::val;
using JSColor = int32_t;
using JSObject = emscripten::val;
using JSString = emscripten::val;
using SkPathOrNull = emscripten::val;
using Uint8Array = emscripten::val;
// Aliases for less typing
using BoneIndices = SkVertices::BoneIndices;
using BoneWeights = SkVertices::BoneWeights;
using Bone = SkVertices::Bone;
void EMSCRIPTEN_KEEPALIVE initFonts() {
gSkFontMgr_DefaultFactory = &sk_tool_utils::MakePortableFontMgr;
}
#if SK_SUPPORT_GPU
// Wraps the WebGL context in an SkSurface and returns it.
// This function based on the work of
// https://github.com/Zubnix/skia-wasm-port/, used under the terms of the MIT license.
sk_sp<SkSurface> getWebGLSurface(std::string id, int width, int height) {
// Context configurations
EmscriptenWebGLContextAttributes attrs;
emscripten_webgl_init_context_attributes(&attrs);
attrs.alpha = true;
attrs.premultipliedAlpha = true;
attrs.majorVersion = 1;
attrs.enableExtensionsByDefault = true;
EMSCRIPTEN_WEBGL_CONTEXT_HANDLE context = emscripten_webgl_create_context(id.c_str(), &attrs);
if (context < 0) {
printf("failed to create webgl context %d\n", context);
return nullptr;
}
EMSCRIPTEN_RESULT r = emscripten_webgl_make_context_current(context);
if (r < 0) {
printf("failed to make webgl current %d\n", r);
return nullptr;
}
glClearColor(0, 0, 0, 0);
glClearStencil(0);
glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
// setup GrContext
auto interface = GrGLMakeNativeInterface();
// setup contexts
sk_sp<GrContext> grContext(GrContext::MakeGL(interface));
// Wrap the frame buffer object attached to the screen in a Skia render target so Skia can
// render to it
GrGLint buffer;
glGetIntegerv(GL_FRAMEBUFFER_BINDING, &buffer);
GrGLFramebufferInfo info;
info.fFBOID = (GrGLuint) buffer;
SkColorType colorType;
info.fFormat = GL_RGBA8;
colorType = kRGBA_8888_SkColorType;
GrBackendRenderTarget target(width, height, 0, 8, info);
sk_sp<SkSurface> surface(SkSurface::MakeFromBackendRenderTarget(grContext.get(), target,
kBottomLeft_GrSurfaceOrigin,
colorType, nullptr, nullptr));
return surface;
}
#endif
struct SimpleMatrix {
SkScalar scaleX, skewX, transX;
SkScalar skewY, scaleY, transY;
SkScalar pers0, pers1, pers2;
};
SkMatrix toSkMatrix(const SimpleMatrix& sm) {
return SkMatrix::MakeAll(sm.scaleX, sm.skewX , sm.transX,
sm.skewY , sm.scaleY, sm.transY,
sm.pers0 , sm.pers1 , sm.pers2);
}
struct SimpleImageInfo {
int width;
int height;
SkColorType colorType;
SkAlphaType alphaType;
// TODO color spaces?
};
SkImageInfo toSkImageInfo(const SimpleImageInfo& sii) {
return SkImageInfo::Make(sii.width, sii.height, sii.colorType, sii.alphaType);
}
#if SK_INCLUDE_SKOTTIE && SK_INCLUDE_MANAGED_SKOTTIE
namespace {
class ManagedAnimation final : public SkRefCnt {
public:
static sk_sp<ManagedAnimation> Make(const std::string& json) {
auto mgr = skstd::make_unique<skottie_utils::CustomPropertyManager>();
auto animation = skottie::Animation::Builder()
.setMarkerObserver(mgr->getMarkerObserver())
.setPropertyObserver(mgr->getPropertyObserver())
.make(json.c_str(), json.size());
return animation
? sk_sp<ManagedAnimation>(new ManagedAnimation(std::move(animation), std::move(mgr)))
: nullptr;
}
// skottie::Animation API
void render(SkCanvas* canvas) const { fAnimation->render(canvas, nullptr); }
void render(SkCanvas* canvas, const SkRect& dst) const { fAnimation->render(canvas, &dst); }
void seek(SkScalar t) { fAnimation->seek(t); }
SkScalar duration() const { return fAnimation->duration(); }
const SkSize& size() const { return fAnimation->size(); }
std::string version() const { return std::string(fAnimation->version().c_str()); }
// CustomPropertyManager API
JSArray getColorProps() const {
JSArray props = emscripten::val::array();
for (const auto& cp : fPropMgr->getColorProps()) {
JSObject prop = emscripten::val::object();
prop.set("key", cp);
prop.set("value", fPropMgr->getColor(cp));
props.call<void>("push", prop);
}
return props;
}
JSArray getOpacityProps() const {
JSArray props = emscripten::val::array();
for (const auto& op : fPropMgr->getOpacityProps()) {
JSObject prop = emscripten::val::object();
prop.set("key", op);
prop.set("value", fPropMgr->getOpacity(op));
props.call<void>("push", prop);
}
return props;
}
bool setColor(const std::string& key, JSColor c) {
return fPropMgr->setColor(key, static_cast<SkColor>(c));
}
bool setOpacity(const std::string& key, float o) {
return fPropMgr->setOpacity(key, o);
}
JSArray getMarkers() const {
JSArray markers = emscripten::val::array();
for (const auto& m : fPropMgr->markers()) {
JSObject marker = emscripten::val::object();
marker.set("name", m.name);
marker.set("t0" , m.t0);
marker.set("t1" , m.t1);
markers.call<void>("push", marker);
}
return markers;
}
private:
ManagedAnimation(sk_sp<skottie::Animation> animation,
std::unique_ptr<skottie_utils::CustomPropertyManager> propMgr)
: fAnimation(std::move(animation))
, fPropMgr(std::move(propMgr)) {}
sk_sp<skottie::Animation> fAnimation;
std::unique_ptr<skottie_utils::CustomPropertyManager> fPropMgr;
};
} // anonymous ns
#endif // SK_INCLUDE_SKOTTIE
//========================================================================================
// Path things
//========================================================================================
// All these Apply* methods are simple wrappers to avoid returning an object.
// The default WASM bindings produce code that will leak if a return value
// isn't assigned to a JS variable and has delete() called on it.
// These Apply methods, combined with the smarter binding code allow for chainable
// commands that don't leak if the return value is ignored (i.e. when used intuitively).
void ApplyAddArc(SkPath& orig, const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle) {
orig.addArc(oval, startAngle, sweepAngle);
}
void ApplyAddPath(SkPath& orig, const SkPath& newPath,
SkScalar scaleX, SkScalar skewX, SkScalar transX,
SkScalar skewY, SkScalar scaleY, SkScalar transY,
SkScalar pers0, SkScalar pers1, SkScalar pers2,
bool extendPath) {
SkMatrix m = SkMatrix::MakeAll(scaleX, skewX , transX,
skewY , scaleY, transY,
pers0 , pers1 , pers2);
orig.addPath(newPath, m, extendPath ? SkPath::kExtend_AddPathMode :
SkPath::kAppend_AddPathMode);
}
void ApplyAddRect(SkPath& path, SkScalar left, SkScalar top,
SkScalar right, SkScalar bottom, bool ccw) {
path.addRect(left, top, right, bottom,
ccw ? SkPath::Direction::kCW_Direction :
SkPath::Direction::kCCW_Direction);
}
void ApplyArcTo(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2,
SkScalar radius) {
p.arcTo(x1, y1, x2, y2, radius);
}
void ApplyClose(SkPath& p) {
p.close();
}
void ApplyConicTo(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2,
SkScalar w) {
p.conicTo(x1, y1, x2, y2, w);
}
void ApplyCubicTo(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2,
SkScalar x3, SkScalar y3) {
p.cubicTo(x1, y1, x2, y2, x3, y3);
}
void ApplyLineTo(SkPath& p, SkScalar x, SkScalar y) {
p.lineTo(x, y);
}
void ApplyMoveTo(SkPath& p, SkScalar x, SkScalar y) {
p.moveTo(x, y);
}
void ApplyQuadTo(SkPath& p, SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2) {
p.quadTo(x1, y1, x2, y2);
}
void ApplyTransform(SkPath& orig,
SkScalar scaleX, SkScalar skewX, SkScalar transX,
SkScalar skewY, SkScalar scaleY, SkScalar transY,
SkScalar pers0, SkScalar pers1, SkScalar pers2) {
SkMatrix m = SkMatrix::MakeAll(scaleX, skewX , transX,
skewY , scaleY, transY,
pers0 , pers1 , pers2);
orig.transform(m);
}
bool EMSCRIPTEN_KEEPALIVE ApplySimplify(SkPath& path) {
return Simplify(path, &path);
}
bool EMSCRIPTEN_KEEPALIVE ApplyPathOp(SkPath& pathOne, const SkPath& pathTwo, SkPathOp op) {
return Op(pathOne, pathTwo, op, &pathOne);
}
JSString EMSCRIPTEN_KEEPALIVE ToSVGString(const SkPath& path) {
SkString s;
SkParsePath::ToSVGString(path, &s);
return emscripten::val(s.c_str());
}
SkPathOrNull EMSCRIPTEN_KEEPALIVE MakePathFromOp(const SkPath& pathOne, const SkPath& pathTwo, SkPathOp op) {
SkPath out;
if (Op(pathOne, pathTwo, op, &out)) {
return emscripten::val(out);
}
return emscripten::val::null();
}
SkPath EMSCRIPTEN_KEEPALIVE CopyPath(const SkPath& a) {
SkPath copy(a);
return copy;
}
bool EMSCRIPTEN_KEEPALIVE Equals(const SkPath& a, const SkPath& b) {
return a == b;
}
//========================================================================================
// Path Effects
//========================================================================================
bool ApplyDash(SkPath& path, SkScalar on, SkScalar off, SkScalar phase) {
SkScalar intervals[] = { on, off };
auto pe = SkDashPathEffect::Make(intervals, 2, phase);
if (!pe) {
SkDebugf("Invalid args to dash()\n");
return false;
}
SkStrokeRec rec(SkStrokeRec::InitStyle::kHairline_InitStyle);
if (pe->filterPath(&path, path, &rec, nullptr)) {
return true;
}
SkDebugf("Could not make dashed path\n");
return false;
}
bool ApplyTrim(SkPath& path, SkScalar startT, SkScalar stopT, bool isComplement) {
auto mode = isComplement ? SkTrimPathEffect::Mode::kInverted : SkTrimPathEffect::Mode::kNormal;
auto pe = SkTrimPathEffect::Make(startT, stopT, mode);
if (!pe) {
SkDebugf("Invalid args to trim(): startT and stopT must be in [0,1]\n");
return false;
}
SkStrokeRec rec(SkStrokeRec::InitStyle::kHairline_InitStyle);
if (pe->filterPath(&path, path, &rec, nullptr)) {
return true;
}
SkDebugf("Could not trim path\n");
return false;
}
struct StrokeOpts {
// Default values are set in interface.js which allows clients
// to set any number of them. Otherwise, the binding code complains if
// any are omitted.
SkScalar width;
SkScalar miter_limit;
SkPaint::Join join;
SkPaint::Cap cap;
};
bool ApplyStroke(SkPath& path, StrokeOpts opts) {
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeCap(opts.cap);
p.setStrokeJoin(opts.join);
p.setStrokeWidth(opts.width);
p.setStrokeMiter(opts.miter_limit);
return p.getFillPath(path, &path);
}
// to map from raw memory to a uint8array
Uint8Array getSkDataBytes(const SkData *data) {
return Uint8Array(typed_memory_view(data->size(), data->bytes()));
}
// These objects have private destructors / delete mthods - I don't think
// we need to do anything other than tell emscripten to do nothing.
namespace emscripten {
namespace internal {
template<typename ClassType>
void raw_destructor(ClassType *);
template<>
void raw_destructor<SkData>(SkData *ptr) {
}
template<>
void raw_destructor<SkVertices>(SkVertices *ptr) {
}
}
}
// Some timesignatures below have uintptr_t instead of a pointer to a primative
// type (e.g. SkScalar). This is necessary because we can't use "bind" (EMSCRIPTEN_BINDINGS)
// and pointers to primitive types (Only bound types like SkPoint). We could if we used
// cwrap (see https://becominghuman.ai/passing-and-returning-webassembly-array-parameters-a0f572c65d97)
// but that requires us to stick to C code and, AFAIK, doesn't allow us to return nice things like
// SkPath or SkCanvas.
//
// So, basically, if we are using C++ and EMSCRIPTEN_BINDINGS, we can't have primative pointers
// 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.
EMSCRIPTEN_BINDINGS(Skia) {
function("initFonts", &initFonts);
#if SK_SUPPORT_GPU
function("_getWebGLSurface", &getWebGLSurface, allow_raw_pointers());
function("currentContext", &emscripten_webgl_get_current_context);
function("setCurrentContext", &emscripten_webgl_make_context_current);
constant("gpu", true);
#endif
function("_decodeImage", optional_override([](uintptr_t /* uint8_t* */ iptr,
size_t length)->sk_sp<SkImage> {
uint8_t* imgData = reinterpret_cast<uint8_t*>(iptr);
sk_sp<SkData> bytes = SkData::MakeWithoutCopy(imgData, length);
return SkImage::MakeFromEncoded(bytes);
}), allow_raw_pointers());
function("_getRasterDirectSurface", optional_override([](const SimpleImageInfo ii,
uintptr_t /* uint8_t* */ pPtr,
size_t rowBytes)->sk_sp<SkSurface> {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo imageInfo = toSkImageInfo(ii);
return SkSurface::MakeRasterDirect(imageInfo, pixels, rowBytes, nullptr);
}), allow_raw_pointers());
function("_getRasterN32PremulSurface", optional_override([](int width, int height)->sk_sp<SkSurface> {
return SkSurface::MakeRasterN32Premul(width, height, nullptr);
}), allow_raw_pointers());
function("getSkDataBytes", &getSkDataBytes, allow_raw_pointers());
function("MakeSkCornerPathEffect", &SkCornerPathEffect::Make, allow_raw_pointers());
function("MakeSkDiscretePathEffect", &SkDiscretePathEffect::Make, allow_raw_pointers());
function("MakeBlurMaskFilter", optional_override([](SkBlurStyle style, SkScalar sigma, bool respectCTM)->sk_sp<SkMaskFilter> {
// Adds a little helper because emscripten doesn't expose default params.
return SkMaskFilter::MakeBlur(style, sigma, respectCTM);
}), allow_raw_pointers());
function("MakePathFromOp", &MakePathFromOp);
// These won't be called directly, there's a JS helper to deal with typed arrays.
function("_MakeSkDashPathEffect", optional_override([](uintptr_t /* float* */ cptr, int count, SkScalar phase)->sk_sp<SkPathEffect> {
// See comment above for uintptr_t explanation
const float* intervals = reinterpret_cast<const float*>(cptr);
return SkDashPathEffect::Make(intervals, count, phase);
}), allow_raw_pointers());
function("_MakeImage", optional_override([](SimpleImageInfo ii,
uintptr_t /* uint8_t* */ pPtr, int plen,
size_t rowBytes)->sk_sp<SkImage> {
// See comment above for uintptr_t explanation
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo info = toSkImageInfo(ii);
sk_sp<SkData> pixelData = SkData::MakeFromMalloc(pixels, plen);
return SkImage::MakeRasterData(info, pixelData, rowBytes);
}), allow_raw_pointers());
function("_MakeImageShader", optional_override([](uintptr_t /* uint8_t* */ iPtr, int ilen,
SkShader::TileMode tx, SkShader::TileMode ty)->sk_sp<SkShader> {
// See comment above for uintptr_t explanation
const uint8_t* imgBytes = reinterpret_cast<const uint8_t*>(iPtr);
auto imgData = SkData::MakeFromMalloc(imgBytes, ilen);
auto img = SkImage::MakeFromEncoded(imgData);
if (!img) {
SkDebugf("Could not decode image\n");
return nullptr;
}
return SkImageShader::Make(img, tx, ty, nullptr);
}), allow_raw_pointers());
// Allow localMatrix to be optional, so we have 2 declarations of these gradients
function("_MakeLinearGradientShader", optional_override([](SkPoint start, SkPoint end,
uintptr_t /* SkColor* */ cPtr, uintptr_t /* SkScalar* */ pPtr,
int count, SkShader::TileMode mode, uint32_t flags)->sk_sp<SkShader> {
SkPoint points[] = { start, end };
// See comment above for uintptr_t explanation
const SkColor* colors = reinterpret_cast<const SkColor*> (cPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
return SkGradientShader::MakeLinear(points, colors, positions, count,
mode, flags, nullptr);
}), allow_raw_pointers());
function("_MakeLinearGradientShader", optional_override([](SkPoint start, SkPoint end,
uintptr_t /* SkColor* */ cPtr, uintptr_t /* SkScalar* */ pPtr,
int count, SkShader::TileMode mode, uint32_t flags,
const SimpleMatrix& lm)->sk_sp<SkShader> {
SkPoint points[] = { start, end };
// See comment above for uintptr_t explanation
const SkColor* colors = reinterpret_cast<const SkColor*> (cPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
SkMatrix localMatrix = toSkMatrix(lm);
return SkGradientShader::MakeLinear(points, colors, positions, count,
mode, flags, &localMatrix);
}), allow_raw_pointers());
function("_MakeRadialGradientShader", optional_override([](SkPoint center, SkScalar radius,
uintptr_t /* SkColor* */ cPtr, uintptr_t /* SkScalar* */ pPtr,
int count, SkShader::TileMode mode, uint32_t flags)->sk_sp<SkShader> {
// See comment above for uintptr_t explanation
const SkColor* colors = reinterpret_cast<const SkColor*> (cPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
return SkGradientShader::MakeRadial(center, radius, colors, positions, count,
mode, flags, nullptr);
}), allow_raw_pointers());
function("_MakeRadialGradientShader", optional_override([](SkPoint center, SkScalar radius,
uintptr_t /* SkColor* */ cPtr, uintptr_t /* SkScalar* */ pPtr,
int count, SkShader::TileMode mode, uint32_t flags,
const SimpleMatrix& lm)->sk_sp<SkShader> {
// See comment above for uintptr_t explanation
const SkColor* colors = reinterpret_cast<const SkColor*> (cPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
SkMatrix localMatrix = toSkMatrix(lm);
return SkGradientShader::MakeRadial(center, radius, colors, positions, count,
mode, flags, &localMatrix);
}), allow_raw_pointers());
function("_MakeTwoPointConicalGradientShader", optional_override([](
SkPoint start, SkScalar startRadius,
SkPoint end, SkScalar endRadius,
uintptr_t /* SkColor* */ cPtr, uintptr_t /* SkScalar* */ pPtr,
int count, SkShader::TileMode mode, uint32_t flags)->sk_sp<SkShader> {
// See comment above for uintptr_t explanation
const SkColor* colors = reinterpret_cast<const SkColor*> (cPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
return SkGradientShader::MakeTwoPointConical(start, startRadius, end, endRadius,
colors, positions, count, mode,
flags, nullptr);
}), allow_raw_pointers());
function("_MakeTwoPointConicalGradientShader", optional_override([](
SkPoint start, SkScalar startRadius,
SkPoint end, SkScalar endRadius,
uintptr_t /* SkColor* */ cPtr, uintptr_t /* SkScalar* */ pPtr,
int count, SkShader::TileMode mode, uint32_t flags,
const SimpleMatrix& lm)->sk_sp<SkShader> {
// See comment above for uintptr_t explanation
const SkColor* colors = reinterpret_cast<const SkColor*> (cPtr);
const SkScalar* positions = reinterpret_cast<const SkScalar*>(pPtr);
SkMatrix localMatrix = toSkMatrix(lm);
return SkGradientShader::MakeTwoPointConical(start, startRadius, end, endRadius,
colors, positions, count, mode,
flags, &localMatrix);
}), allow_raw_pointers());
function("_MakeSkVertices", optional_override([](SkVertices::VertexMode mode, int vertexCount,
uintptr_t /* SkPoint* */ pPtr, uintptr_t /* SkPoint* */ tPtr,
uintptr_t /* SkColor* */ cPtr,
uintptr_t /* BoneIndices* */ biPtr, uintptr_t /* BoneWeights* */ bwPtr,
int indexCount, uintptr_t /* uint16_t * */ iPtr)->sk_sp<SkVertices> {
// See comment above for uintptr_t explanation
const SkPoint* positions = reinterpret_cast<const SkPoint*>(pPtr);
const SkPoint* texs = reinterpret_cast<const SkPoint*>(tPtr);
const SkColor* colors = reinterpret_cast<const SkColor*>(cPtr);
const BoneIndices* boneIndices = reinterpret_cast<const BoneIndices*>(biPtr);
const BoneWeights* boneWeights = reinterpret_cast<const BoneWeights*>(bwPtr);
const uint16_t* indices = reinterpret_cast<const uint16_t*>(iPtr);
return SkVertices::MakeCopy(mode, vertexCount, positions, texs, colors,
boneIndices, boneWeights, indexCount, indices);
}), allow_raw_pointers());
class_<SkCanvas>("SkCanvas")
.constructor<>()
.function("clear", optional_override([](SkCanvas& self, JSColor color)->void {
// JS side gives us a signed int instead of an unsigned int for color
// Add a optional_override to change it out.
self.clear(SkColor(color));
}))
.function("clipPath", select_overload<void (const SkPath&, SkClipOp, bool)>(&SkCanvas::clipPath))
.function("clipRect", select_overload<void (const SkRect&, SkClipOp, bool)>(&SkCanvas::clipRect))
.function("concat", optional_override([](SkCanvas& self, const SimpleMatrix& m) {
self.concat(toSkMatrix(m));
}))
.function("drawImage", select_overload<void (const sk_sp<SkImage>&, SkScalar, SkScalar, const SkPaint*)>(&SkCanvas::drawImage), allow_raw_pointers())
.function("drawImageRect", optional_override([](SkCanvas& self, const sk_sp<SkImage>& image,
SkRect src, SkRect dst,
const SkPaint* paint, bool fastSample)->void {
self.drawImageRect(image, src, dst, paint,
fastSample ? SkCanvas::kFast_SrcRectConstraint :
SkCanvas::kStrict_SrcRectConstraint);
}), allow_raw_pointers())
.function("drawPaint", &SkCanvas::drawPaint)
.function("drawPath", &SkCanvas::drawPath)
.function("drawRect", &SkCanvas::drawRect)
.function("drawShadow", optional_override([](SkCanvas& self, const SkPath& path,
const SkPoint3& zPlaneParams,
const SkPoint3& lightPos, SkScalar lightRadius,
JSColor ambientColor, JSColor spotColor,
uint32_t flags) {
SkShadowUtils::DrawShadow(&self, path, zPlaneParams, lightPos, lightRadius,
SkColor(ambientColor), SkColor(spotColor), flags);
}))
.function("drawText", optional_override([](SkCanvas& self, std::string text, SkScalar x,
SkScalar y, const SkPaint& p) {
// TODO(kjlubick): This does not work well for non-ascii
// Need to maybe add a helper in interface.js that supports UTF-8
// Otherwise, go with std::wstring and set UTF-32 encoding.
self.drawText(text.c_str(), text.length(), x, y, p);
}))
.function("drawVertices", select_overload<void (const sk_sp<SkVertices>&, SkBlendMode, const SkPaint&)>(&SkCanvas::drawVertices))
.function("flush", &SkCanvas::flush)
.function("_readPixels", optional_override([](SkCanvas& self, SimpleImageInfo di,
uintptr_t /* uint8_t* */ pPtr,
size_t dstRowBytes, int srcX, int srcY) {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo dstInfo = toSkImageInfo(di);
return self.readPixels(dstInfo, pixels, dstRowBytes, srcX, srcY);
}))
.function("restore", &SkCanvas::restore)
.function("rotate", select_overload<void (SkScalar, SkScalar, SkScalar)>(&SkCanvas::rotate))
.function("save", &SkCanvas::save)
.function("scale", &SkCanvas::scale)
.function("skew", &SkCanvas::skew)
.function("translate", &SkCanvas::translate)
.function("_writePixels", optional_override([](SkCanvas& self, SimpleImageInfo di,
uintptr_t /* uint8_t* */ pPtr,
size_t srcRowBytes, int dstX, int dstY) {
uint8_t* pixels = reinterpret_cast<uint8_t*>(pPtr);
SkImageInfo dstInfo = toSkImageInfo(di);
return self.writePixels(dstInfo, pixels, srcRowBytes, dstX, dstY);
}))
;
class_<SkData>("SkData")
.smart_ptr<sk_sp<SkData>>("sk_sp<SkData>>")
.function("size", &SkData::size);
class_<SkImage>("SkImage")
.smart_ptr<sk_sp<SkImage>>("sk_sp<SkImage>")
.function("height", &SkImage::height)
.function("width", &SkImage::width)
.function("_encodeToData", select_overload<sk_sp<SkData>()const>(&SkImage::encodeToData))
.function("_encodeToDataWithFormat", select_overload<sk_sp<SkData>(SkEncodedImageFormat encodedImageFormat, int quality)const>(&SkImage::encodeToData));
class_<SkMaskFilter>("SkMaskFilter")
.smart_ptr<sk_sp<SkMaskFilter>>("sk_sp<SkMaskFilter>");
class_<SkPaint>("SkPaint")
.constructor<>()
.function("copy", optional_override([](const SkPaint& self)->SkPaint {
SkPaint p(self);
return p;
}))
.function("getBlendMode", &SkPaint::getBlendMode)
.function("getColor", optional_override([](SkPaint& self)->JSColor {
// JS side gives us a signed int instead of an unsigned int for color
// Add a optional_override to change it out.
return JSColor(self.getColor());
}))
.function("getFilterQuality", &SkPaint::getFilterQuality)
.function("getStrokeCap", &SkPaint::getStrokeCap)
.function("getStrokeJoin", &SkPaint::getStrokeJoin)
.function("getStrokeMiter", &SkPaint::getStrokeMiter)
.function("getStrokeWidth", &SkPaint::getStrokeWidth)
.function("getTextSize", &SkPaint::getTextSize)
.function("measureText", optional_override([](SkPaint& self, std::string text) {
// TODO(kjlubick): This does not work well for non-ascii
// Need to maybe add a helper in interface.js that supports UTF-8
// Otherwise, go with std::wstring and set UTF-32 encoding.
return self.measureText(text.c_str(), text.length());
}))
.function("setAntiAlias", &SkPaint::setAntiAlias)
.function("setBlendMode", &SkPaint::setBlendMode)
.function("setColor", optional_override([](SkPaint& self, JSColor color)->void {
// JS side gives us a signed int instead of an unsigned int for color
// Add a optional_override to change it out.
self.setColor(SkColor(color));
}))
.function("setFilterQuality", &SkPaint::setFilterQuality)
.function("setMaskFilter", &SkPaint::setMaskFilter)
.function("setPathEffect", &SkPaint::setPathEffect)
.function("setShader", &SkPaint::setShader)
.function("setStrokeCap", &SkPaint::setStrokeCap)
.function("setStrokeJoin", &SkPaint::setStrokeJoin)
.function("setStrokeMiter", &SkPaint::setStrokeMiter)
.function("setStrokeWidth", &SkPaint::setStrokeWidth)
.function("setStyle", &SkPaint::setStyle)
.function("setTextSize", &SkPaint::setTextSize);
class_<SkPathEffect>("SkPathEffect")
.smart_ptr<sk_sp<SkPathEffect>>("sk_sp<SkPathEffect>");
class_<SkPath>("SkPath")
.constructor<>()
.constructor<const SkPath&>()
.function("_addArc", &ApplyAddArc)
// interface.js has 3 overloads of addPath
.function("_addPath", &ApplyAddPath)
// interface.js has 4 overloads of addRect
.function("_addRect", &ApplyAddRect)
.function("_arcTo", &ApplyArcTo)
.function("_close", &ApplyClose)
.function("_conicTo", &ApplyConicTo)
.function("countPoints", &SkPath::countPoints)
.function("_cubicTo", &ApplyCubicTo)
.function("getPoint", &SkPath::getPoint)
.function("_lineTo", &ApplyLineTo)
.function("_moveTo", &ApplyMoveTo)
.function("_quadTo", &ApplyQuadTo)
.function("_transform", select_overload<void(SkPath&, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar)>(&ApplyTransform))
// PathEffects
.function("_dash", &ApplyDash)
.function("_trim", &ApplyTrim)
.function("_stroke", &ApplyStroke)
// PathOps
.function("_simplify", &ApplySimplify)
.function("_op", &ApplyPathOp)
// Exporting
.function("toSVGString", &ToSVGString)
.function("setFillType", &SkPath::setFillType)
.function("getFillType", &SkPath::getFillType)
.function("getBounds", &SkPath::getBounds)
.function("computeTightBounds", &SkPath::computeTightBounds)
.function("equals", &Equals)
.function("copy", &CopyPath)
#ifdef SK_DEBUG
.function("dump", select_overload<void() const>(&SkPath::dump))
.function("dumpHex", select_overload<void() const>(&SkPath::dumpHex))
#endif
;
class_<SkShader>("SkShader")
.smart_ptr<sk_sp<SkShader>>("sk_sp<SkShader>");
class_<SkSurface>("SkSurface")
.smart_ptr<sk_sp<SkSurface>>("sk_sp<SkSurface>")
.function("width", &SkSurface::width)
.function("height", &SkSurface::height)
.function("_flush", &SkSurface::flush)
.function("makeImageSnapshot", select_overload<sk_sp<SkImage>()>(&SkSurface::makeImageSnapshot))
.function("makeImageSnapshot", select_overload<sk_sp<SkImage>(const SkIRect& bounds)>(&SkSurface::makeImageSnapshot))
.function("getCanvas", &SkSurface::getCanvas, allow_raw_pointers());
class_<SkVertices>("SkVertices")
.smart_ptr<sk_sp<SkVertices>>("sk_sp<SkVertices>")
.function("_applyBones", optional_override([](SkVertices& self, uintptr_t /* Bone* */ bptr, int boneCount)->sk_sp<SkVertices> {
// See comment above for uintptr_t explanation
const Bone* bones = reinterpret_cast<const Bone*>(bptr);
return self.applyBones(bones, boneCount);
}))
.function("bounds", &SkVertices::bounds)
.function("mode", &SkVertices::mode)
.function("uniqueID", &SkVertices::uniqueID)
#ifdef SK_DEBUG
.function("dumpPositions", optional_override([](SkVertices& self)->void {
auto pos = self.positions();
for(int i = 0; i< self.vertexCount(); i++) {
SkDebugf("position[%d] = (%f, %f)\n", i, pos[i].x(), pos[i].y());
}
}))
#endif
.function("vertexCount", &SkVertices::vertexCount);
enum_<SkAlphaType>("AlphaType")
.value("Opaque", SkAlphaType::kOpaque_SkAlphaType)
.value("Premul", SkAlphaType::kPremul_SkAlphaType)
.value("Unpremul", SkAlphaType::kUnpremul_SkAlphaType);
enum_<SkBlendMode>("BlendMode")
.value("Clear", SkBlendMode::kClear)
.value("Src", SkBlendMode::kSrc)
.value("Dst", SkBlendMode::kDst)
.value("SrcOver", SkBlendMode::kSrcOver)
.value("DstOver", SkBlendMode::kDstOver)
.value("SrcIn", SkBlendMode::kSrcIn)
.value("DstIn", SkBlendMode::kDstIn)
.value("SrcOut", SkBlendMode::kSrcOut)
.value("DstOut", SkBlendMode::kDstOut)
.value("SrcATop", SkBlendMode::kSrcATop)
.value("DstATop", SkBlendMode::kDstATop)
.value("Xor", SkBlendMode::kXor)
.value("Plus", SkBlendMode::kPlus)
.value("Modulate", SkBlendMode::kModulate)
.value("Screen", SkBlendMode::kScreen)
.value("Overlay", SkBlendMode::kOverlay)
.value("Darken", SkBlendMode::kDarken)
.value("Lighten", SkBlendMode::kLighten)
.value("ColorDodge", SkBlendMode::kColorDodge)
.value("ColorBurn", SkBlendMode::kColorBurn)
.value("HardLight", SkBlendMode::kHardLight)
.value("SoftLight", SkBlendMode::kSoftLight)
.value("Difference", SkBlendMode::kDifference)
.value("Exclusion", SkBlendMode::kExclusion)
.value("Multiply", SkBlendMode::kMultiply)
.value("Hue", SkBlendMode::kHue)
.value("Saturation", SkBlendMode::kSaturation)
.value("Color", SkBlendMode::kColor)
.value("Luminosity", SkBlendMode::kLuminosity);
enum_<SkBlurStyle>("BlurStyle")
.value("Normal", SkBlurStyle::kNormal_SkBlurStyle)
.value("Solid", SkBlurStyle::kSolid_SkBlurStyle)
.value("Outer", SkBlurStyle::kOuter_SkBlurStyle)
.value("Inner", SkBlurStyle::kInner_SkBlurStyle);
enum_<SkClipOp>("ClipOp")
.value("Difference", SkClipOp::kDifference)
.value("Intersect", SkClipOp::kIntersect);
enum_<SkColorType>("ColorType")
.value("Alpha_8", SkColorType::kAlpha_8_SkColorType)
.value("RGB_565", SkColorType::kRGB_565_SkColorType)
.value("ARGB_4444", SkColorType::kARGB_4444_SkColorType)
.value("RGBA_8888", SkColorType::kRGBA_8888_SkColorType)
.value("RGB_888x", SkColorType::kRGB_888x_SkColorType)
.value("BGRA_8888", SkColorType::kBGRA_8888_SkColorType)
.value("RGBA_1010102", SkColorType::kRGBA_1010102_SkColorType)
.value("RGB_101010x", SkColorType::kRGB_101010x_SkColorType)
.value("Gray_8", SkColorType::kGray_8_SkColorType)
.value("RGBA_F16", SkColorType::kRGBA_F16_SkColorType)
.value("RGBA_F32", SkColorType::kRGBA_F32_SkColorType);
enum_<SkPath::FillType>("FillType")
.value("Winding", SkPath::FillType::kWinding_FillType)
.value("EvenOdd", SkPath::FillType::kEvenOdd_FillType)
.value("InverseWinding", SkPath::FillType::kInverseWinding_FillType)
.value("InverseEvenOdd", SkPath::FillType::kInverseEvenOdd_FillType);
enum_<SkFilterQuality>("FilterQuality")
.value("None", SkFilterQuality::kNone_SkFilterQuality)
.value("Low", SkFilterQuality::kLow_SkFilterQuality)
.value("Medium", SkFilterQuality::kMedium_SkFilterQuality)
.value("High", SkFilterQuality::kHigh_SkFilterQuality);
enum_<SkEncodedImageFormat>("ImageFormat")
.value("PNG", SkEncodedImageFormat::kPNG)
.value("JPEG", SkEncodedImageFormat::kJPEG);
enum_<SkPaint::Style>("PaintStyle")
.value("Fill", SkPaint::Style::kFill_Style)
.value("Stroke", SkPaint::Style::kStroke_Style)
.value("StrokeAndFill", SkPaint::Style::kStrokeAndFill_Style);
enum_<SkPathOp>("PathOp")
.value("Difference", SkPathOp::kDifference_SkPathOp)
.value("Intersect", SkPathOp::kIntersect_SkPathOp)
.value("Union", SkPathOp::kUnion_SkPathOp)
.value("XOR", SkPathOp::kXOR_SkPathOp)
.value("ReverseDifference", SkPathOp::kReverseDifference_SkPathOp);
enum_<SkPaint::Cap>("StrokeCap")
.value("Butt", SkPaint::Cap::kButt_Cap)
.value("Round", SkPaint::Cap::kRound_Cap)
.value("Square", SkPaint::Cap::kSquare_Cap);
enum_<SkPaint::Join>("StrokeJoin")
.value("Miter", SkPaint::Join::kMiter_Join)
.value("Round", SkPaint::Join::kRound_Join)
.value("Bevel", SkPaint::Join::kBevel_Join);
value_object<StrokeOpts>("StrokeOpts")
.field("width", &StrokeOpts::width)
.field("miter_limit", &StrokeOpts::miter_limit)
.field("join", &StrokeOpts::join)
.field("cap", &StrokeOpts::cap);
enum_<SkShader::TileMode>("TileMode")
.value("Clamp", SkShader::TileMode::kClamp_TileMode)
.value("Repeat", SkShader::TileMode::kRepeat_TileMode)
.value("Mirror", SkShader::TileMode::kMirror_TileMode);
enum_<SkVertices::VertexMode>("VertexMode")
.value("Triangles", SkVertices::VertexMode::kTriangles_VertexMode)
.value("TrianglesStrip", SkVertices::VertexMode::kTriangleStrip_VertexMode)
.value("TriangleFan", SkVertices::VertexMode::kTriangleFan_VertexMode);
// A value object is much simpler than a class - it is returned as a JS
// object and does not require delete().
// https://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/embind.html#value-types
value_object<SkRect>("SkRect")
.field("fLeft", &SkRect::fLeft)
.field("fTop", &SkRect::fTop)
.field("fRight", &SkRect::fRight)
.field("fBottom", &SkRect::fBottom);
value_object<SkIRect>("SkIRect")
.field("fLeft", &SkIRect::fLeft)
.field("fTop", &SkIRect::fTop)
.field("fRight", &SkIRect::fRight)
.field("fBottom", &SkIRect::fBottom);
value_object<SimpleImageInfo>("SkImageInfo")
.field("width", &SimpleImageInfo::width)
.field("height", &SimpleImageInfo::height)
.field("colorType", &SimpleImageInfo::colorType)
.field("alphaType", &SimpleImageInfo::alphaType);
// SkPoints can be represented by [x, y]
value_array<SkPoint>("SkPoint")
.element(&SkPoint::fX)
.element(&SkPoint::fY);
// SkPoint3s can be represented by [x, y, z]
value_array<SkPoint3>("SkPoint3")
.element(&SkPoint3::fX)
.element(&SkPoint3::fY)
.element(&SkPoint3::fZ);
// {"w": Number, "h", Number}
value_object<SkSize>("SkSize")
.field("w", &SkSize::fWidth)
.field("h", &SkSize::fHeight);
value_object<SkISize>("SkISize")
.field("w", &SkISize::fWidth)
.field("h", &SkISize::fHeight);
// Allows clients to supply a 1D array of 9 elements and the bindings
// will automatically turn it into a 3x3 2D matrix.
// e.g. path.transform([0,1,2,3,4,5,6,7,8])
// This is likely simpler for the client than exposing SkMatrix
// directly and requiring them to do a lot of .delete().
value_array<SimpleMatrix>("SkMatrix")
.element(&SimpleMatrix::scaleX)
.element(&SimpleMatrix::skewX)
.element(&SimpleMatrix::transX)
.element(&SimpleMatrix::skewY)
.element(&SimpleMatrix::scaleY)
.element(&SimpleMatrix::transY)
.element(&SimpleMatrix::pers0)
.element(&SimpleMatrix::pers1)
.element(&SimpleMatrix::pers2);
constant("TRANSPARENT", (JSColor) SK_ColorTRANSPARENT);
constant("RED", (JSColor) SK_ColorRED);
constant("BLUE", (JSColor) SK_ColorBLUE);
constant("YELLOW", (JSColor) SK_ColorYELLOW);
constant("CYAN", (JSColor) SK_ColorCYAN);
constant("BLACK", (JSColor) SK_ColorBLACK);
constant("WHITE", (JSColor) SK_ColorWHITE);
// TODO(?)
#if SK_INCLUDE_SKOTTIE
// Animation things (may eventually go in own library)
class_<skottie::Animation>("Animation")
.smart_ptr<sk_sp<skottie::Animation>>("sk_sp<Animation>")
.function("version", optional_override([](skottie::Animation& self)->std::string {
return std::string(self.version().c_str());
}))
.function("size", &skottie::Animation::size)
.function("duration", &skottie::Animation::duration)
.function("seek", &skottie::Animation::seek)
.function("render", optional_override([](skottie::Animation& self, SkCanvas* canvas)->void {
self.render(canvas, nullptr);
}), allow_raw_pointers())
.function("render", optional_override([](skottie::Animation& self, SkCanvas* canvas,
const SkRect r)->void {
self.render(canvas, &r);
}), allow_raw_pointers());
function("MakeAnimation", optional_override([](std::string json)->sk_sp<skottie::Animation> {
return skottie::Animation::Make(json.c_str(), json.length());
}));
constant("skottie", true);
#if SK_INCLUDE_MANAGED_SKOTTIE
class_<ManagedAnimation>("ManagedAnimation")
.smart_ptr<sk_sp<ManagedAnimation>>("sk_sp<ManagedAnimation>")
.function("version" , &ManagedAnimation::version)
.function("size" , &ManagedAnimation::size)
.function("duration" , &ManagedAnimation::duration)
.function("seek" , &ManagedAnimation::seek)
.function("render" , select_overload<void(SkCanvas*) const>
(&ManagedAnimation::render), allow_raw_pointers())
.function("render" , select_overload<void(SkCanvas*, const SkRect&) const>
(&ManagedAnimation::render), allow_raw_pointers())
.function("setColor" , &ManagedAnimation::setColor)
.function("setOpacity", &ManagedAnimation::setOpacity)
.function("getMarkers", &ManagedAnimation::getMarkers)
.function("getColorProps" , &ManagedAnimation::getColorProps)
.function("getOpacityProps", &ManagedAnimation::getOpacityProps);
function("MakeManagedAnimation", &ManagedAnimation::Make);
constant("managed_skottie", true);
#endif // SK_INCLUDE_MANAGED_SKOTTIE
#endif // SK_INCLUDE_SKOTTIE
}