| /* |
| * Copyright 2018 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkCubicMap.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkStrokeRec.h" |
| #include "include/effects/SkDashPathEffect.h" |
| #include "include/effects/SkTrimPathEffect.h" |
| #include "include/pathops/SkPathOps.h" |
| #include "include/private/SkFloatBits.h" |
| #include "include/private/SkFloatingPoint.h" |
| #include "include/utils/SkParsePath.h" |
| #include "src/core/SkPaintDefaults.h" |
| |
| #include <emscripten/emscripten.h> |
| #include <emscripten/bind.h> |
| |
| using namespace emscripten; |
| |
| static const int MOVE = 0; |
| static const int LINE = 1; |
| static const int QUAD = 2; |
| static const int CONIC = 3; |
| static const int CUBIC = 4; |
| static const int CLOSE = 5; |
| |
| // Just for self-documenting purposes where the main thing being returned is an |
| // SkPath, but in an error case, something of type null (which is val) could also be |
| // returned; |
| using SkPathOrNull = emscripten::val; |
| // Self-documenting for when we return a string |
| using JSString = emscripten::val; |
| using JSArray = emscripten::val; |
| |
| // ================================================================================= |
| // Creating/Exporting Paths with cmd arrays |
| // ================================================================================= |
| |
| template <typename VisitFunc> |
| void VisitPath(const SkPath& p, VisitFunc&& f) { |
| SkPath::RawIter iter(p); |
| SkPoint pts[4]; |
| SkPath::Verb verb; |
| while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { |
| f(verb, pts, iter); |
| } |
| } |
| |
| JSArray EMSCRIPTEN_KEEPALIVE ToCmds(const SkPath& path) { |
| JSArray cmds = emscripten::val::array(); |
| |
| VisitPath(path, [&cmds](SkPath::Verb verb, const SkPoint pts[4], SkPath::RawIter iter) { |
| JSArray cmd = emscripten::val::array(); |
| switch (verb) { |
| case SkPath::kMove_Verb: |
| cmd.call<void>("push", MOVE, pts[0].x(), pts[0].y()); |
| break; |
| case SkPath::kLine_Verb: |
| cmd.call<void>("push", LINE, pts[1].x(), pts[1].y()); |
| break; |
| case SkPath::kQuad_Verb: |
| cmd.call<void>("push", QUAD, pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y()); |
| break; |
| case SkPath::kConic_Verb: |
| cmd.call<void>("push", CONIC, |
| pts[1].x(), pts[1].y(), |
| pts[2].x(), pts[2].y(), iter.conicWeight()); |
| break; |
| case SkPath::kCubic_Verb: |
| cmd.call<void>("push", CUBIC, |
| pts[1].x(), pts[1].y(), |
| pts[2].x(), pts[2].y(), |
| pts[3].x(), pts[3].y()); |
| break; |
| case SkPath::kClose_Verb: |
| cmd.call<void>("push", CLOSE); |
| break; |
| case SkPath::kDone_Verb: |
| SkASSERT(false); |
| break; |
| } |
| cmds.call<void>("push", cmd); |
| }); |
| return cmds; |
| } |
| |
| // This type signature is a mess, but it's necessary. See, 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 SkOpBuilder. |
| // |
| // 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. |
| SkPathOrNull 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; |
| |
| // if there are not enough arguments, bail with the path we've constructed so far. |
| #define CHECK_NUM_ARGS(n) \ |
| if ((i + n) > numCmds) { \ |
| SkDebugf("Not enough args to match the verbs. Saw %d commands\n", numCmds); \ |
| return emscripten::val::null(); \ |
| } |
| |
| for(int i = 0; i < numCmds;){ |
| switch (sk_float_floor2int(cmds[i++])) { |
| case MOVE: |
| CHECK_NUM_ARGS(2); |
| x1 = cmds[i++], y1 = cmds[i++]; |
| path.moveTo(x1, y1); |
| break; |
| case LINE: |
| CHECK_NUM_ARGS(2); |
| x1 = cmds[i++], y1 = cmds[i++]; |
| path.lineTo(x1, y1); |
| break; |
| case QUAD: |
| CHECK_NUM_ARGS(4); |
| x1 = cmds[i++], y1 = cmds[i++]; |
| x2 = cmds[i++], y2 = cmds[i++]; |
| path.quadTo(x1, y1, x2, y2); |
| break; |
| case CONIC: |
| CHECK_NUM_ARGS(5); |
| x1 = cmds[i++], y1 = cmds[i++]; |
| x2 = cmds[i++], y2 = cmds[i++]; |
| x3 = cmds[i++]; // weight |
| path.conicTo(x1, y1, x2, y2, x3); |
| break; |
| case CUBIC: |
| CHECK_NUM_ARGS(6); |
| x1 = cmds[i++], y1 = cmds[i++]; |
| x2 = cmds[i++], y2 = cmds[i++]; |
| x3 = cmds[i++], y3 = cmds[i++]; |
| path.cubicTo(x1, y1, x2, y2, x3, y3); |
| break; |
| case CLOSE: |
| path.close(); |
| break; |
| default: |
| SkDebugf(" path: UNKNOWN command %f, aborting dump...\n", cmds[i-1]); |
| return emscripten::val::null(); |
| } |
| } |
| |
| #undef CHECK_NUM_ARGS |
| |
| return emscripten::val(path); |
| } |
| |
| SkPath EMSCRIPTEN_KEEPALIVE NewPath() { |
| return SkPath(); |
| } |
| |
| 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 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 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); |
| } |
| |
| |
| |
| //======================================================================================== |
| // SVG things |
| //======================================================================================== |
| |
| JSString EMSCRIPTEN_KEEPALIVE ToSVGString(const SkPath& path) { |
| SkString s; |
| SkParsePath::ToSVGString(path, &s); |
| // Wrapping it in val automatically turns it into a JS string. |
| // Not too sure on performance implications, but is is simpler than |
| // returning a raw pointer to const char * and then using |
| // UTF8ToString() on the calling side. |
| return emscripten::val(s.c_str()); |
| } |
| |
| |
| SkPathOrNull EMSCRIPTEN_KEEPALIVE FromSVGString(std::string str) { |
| SkPath path; |
| if (SkParsePath::FromSVGString(str.c_str(), &path)) { |
| return emscripten::val(path); |
| } |
| return emscripten::val::null(); |
| } |
| |
| //======================================================================================== |
| // PATHOP things |
| //======================================================================================== |
| |
| 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); |
| } |
| |
| SkPathOrNull EMSCRIPTEN_KEEPALIVE MakeFromOp(const SkPath& pathOne, const SkPath& pathTwo, SkPathOp op) { |
| SkPath out; |
| if (Op(pathOne, pathTwo, op, &out)) { |
| return emscripten::val(out); |
| } |
| return emscripten::val::null(); |
| } |
| |
| SkPathOrNull EMSCRIPTEN_KEEPALIVE ResolveBuilder(SkOpBuilder& builder) { |
| SkPath path; |
| if (builder.resolve(&path)) { |
| return emscripten::val(path); |
| } |
| return emscripten::val::null(); |
| } |
| |
| //======================================================================================== |
| // Canvas things |
| //======================================================================================== |
| |
| void EMSCRIPTEN_KEEPALIVE ToCanvas(const SkPath& path, emscripten::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: |
| ctx.call<void>("moveTo", pts[0].x(), pts[0].y()); |
| break; |
| case SkPath::kLine_Verb: |
| ctx.call<void>("lineTo", pts[1].x(), pts[1].y()); |
| break; |
| case SkPath::kQuad_Verb: |
| ctx.call<void>("quadraticCurveTo", pts[1].x(), pts[1].y(), pts[2].x(), pts[2].y()); |
| break; |
| case SkPath::kConic_Verb: |
| SkPoint quads[5]; |
| // approximate with 2^1=2 quads. |
| SkPath::ConvertConicToQuads(pts[0], pts[1], pts[2], iter.conicWeight(), quads, 1); |
| ctx.call<void>("quadraticCurveTo", quads[1].x(), quads[1].y(), quads[2].x(), quads[2].y()); |
| ctx.call<void>("quadraticCurveTo", quads[3].x(), quads[3].y(), quads[4].x(), quads[4].y()); |
| break; |
| case SkPath::kCubic_Verb: |
| 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: |
| ctx.call<void>("closePath"); |
| break; |
| case SkPath::kDone_Verb: |
| break; |
| } |
| } |
| } |
| |
| emscripten::val JSPath2D = emscripten::val::global("Path2D"); |
| |
| emscripten::val EMSCRIPTEN_KEEPALIVE ToPath2D(const SkPath& path) { |
| emscripten::val retVal = JSPath2D.new_(); |
| ToCanvas(path, retVal); |
| return retVal; |
| } |
| |
| // ====================================================================================== |
| // Path2D API things |
| // ====================================================================================== |
| void ApplyAddRect(SkPath& path, SkScalar x, SkScalar y, SkScalar width, SkScalar height) { |
| path.addRect(x, y, x+width, y+height); |
| } |
| |
| void ApplyAddArc(SkPath& path, SkScalar x, SkScalar y, SkScalar radius, |
| SkScalar startAngle, SkScalar endAngle, bool ccw) { |
| SkPath temp; |
| SkRect bounds = SkRect::MakeLTRB(x-radius, y-radius, x+radius, y+radius); |
| const auto sweep = SkRadiansToDegrees(endAngle - startAngle) - 360 * ccw; |
| temp.addArc(bounds, SkRadiansToDegrees(startAngle), sweep); |
| path.addPath(temp, SkPath::kExtend_AddPathMode); |
| } |
| |
| void ApplyEllipse(SkPath& path, SkScalar x, SkScalar y, SkScalar radiusX, SkScalar radiusY, |
| SkScalar rotation, SkScalar startAngle, SkScalar endAngle, bool ccw) { |
| // This is easiest to do by making a new path and then extending the current path |
| // (this properly catches the cases of if there's a moveTo before this call or not). |
| SkRect bounds = SkRect::MakeLTRB(x-radiusX, y-radiusY, x+radiusX, y+radiusY); |
| SkPath temp; |
| const auto sweep = SkRadiansToDegrees(endAngle - startAngle) - (360 * ccw); |
| temp.addArc(bounds, SkRadiansToDegrees(startAngle), sweep); |
| |
| SkMatrix m; |
| m.setRotate(SkRadiansToDegrees(rotation), x, y); |
| path.addPath(temp, m, SkPath::kExtend_AddPathMode); |
| } |
| |
| // Allows for full matix control. |
| 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) { |
| SkMatrix m = SkMatrix::MakeAll(scaleX, skewX , transX, |
| skewY , scaleY, transY, |
| pers0 , pers1 , pers2); |
| orig.addPath(newPath, m); |
| } |
| |
| JSString GetFillTypeString(const SkPath& path) { |
| if (path.getFillType() == SkPath::FillType::kWinding_FillType) { |
| return emscripten::val("nonzero"); |
| } else if (path.getFillType() == SkPath::FillType::kEvenOdd_FillType) { |
| return emscripten::val("evenodd"); |
| } else { |
| SkDebugf("warning: can't translate inverted filltype to HTML Canvas\n"); |
| return emscripten::val("nonzero"); //Use default |
| } |
| } |
| |
| //======================================================================================== |
| // 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 chaining.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); |
| } |
| |
| //======================================================================================== |
| // Matrix things |
| //======================================================================================== |
| |
| 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); |
| } |
| |
| void ApplyTransform(SkPath& orig, const SimpleMatrix& sm) { |
| orig.transform(toSkMatrix(sm)); |
| } |
| |
| 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); |
| } |
| |
| //======================================================================================== |
| // Testing things |
| //======================================================================================== |
| |
| // The use case for this is on the JS side is something like: |
| // PathKit.SkBits2FloatUnsigned(parseInt("0xc0a00000")) |
| // to have precise float values for tests. In the C++ tests, we can use SkBits2Float because |
| // it takes int32_t, but the JS parseInt basically returns an unsigned int. So, we add in |
| // this helper which casts for us on the way to SkBits2Float. |
| float SkBits2FloatUnsigned(uint32_t floatAsBits) { |
| return SkBits2Float((int32_t) floatAsBits); |
| } |
| |
| // Binds the classes to the JS |
| // |
| // See https://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/embind.html#non-member-functions-on-the-javascript-prototype |
| // for more on binding non-member functions to the JS object, allowing us to rewire |
| // various functions. That is, we can make the SkPath we expose appear to have methods |
| // that the original SkPath does not, like rect(x, y, width, height) and toPath2D(). |
| // |
| // An important detail for binding non-member functions is that the first argument |
| // must be SkPath& (the reference part is very important). |
| // |
| // Note that we can't expose default or optional arguments, but we can have multiple |
| // declarations of the same function that take different amounts of arguments. |
| // For example, see _transform |
| // Additionally, we are perfectly happy to handle default arguments and function |
| // overloads in the JS glue code (see chaining.js::addPath() for an example). |
| EMSCRIPTEN_BINDINGS(skia) { |
| class_<SkPath>("SkPath") |
| .constructor<>() |
| .constructor<const SkPath&>() |
| |
| // Path2D API |
| .function("_addPath", &ApplyAddPath) |
| // 3 additional overloads of addPath are handled in JS bindings |
| .function("_arc", &ApplyAddArc) |
| .function("_arcTo", &ApplyArcTo) |
| //"bezierCurveTo" alias handled in JS bindings |
| .function("_close", &ApplyClose) |
| //"closePath" alias handled in JS bindings |
| .function("_conicTo", &ApplyConicTo) |
| .function("_cubicTo", &ApplyCubicTo) |
| |
| .function("_ellipse", &ApplyEllipse) |
| .function("_lineTo", &ApplyLineTo) |
| .function("_moveTo", &ApplyMoveTo) |
| // "quadraticCurveTo" alias handled in JS bindings |
| .function("_quadTo", &ApplyQuadTo) |
| .function("_rect", &ApplyAddRect) |
| |
| // Extra features |
| .function("setFillType", &SkPath::setFillType) |
| .function("getFillType", &SkPath::getFillType) |
| .function("getFillTypeString", &GetFillTypeString) |
| .function("getBounds", &SkPath::getBounds) |
| .function("computeTightBounds", &SkPath::computeTightBounds) |
| .function("equals", &Equals) |
| .function("copy", &CopyPath) |
| |
| // PathEffects |
| .function("_dash", &ApplyDash) |
| .function("_trim", &ApplyTrim) |
| .function("_stroke", &ApplyStroke) |
| |
| // Matrix |
| .function("_transform", select_overload<void(SkPath& orig, const SimpleMatrix& sm)>(&ApplyTransform)) |
| .function("_transform", select_overload<void(SkPath& orig, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar, SkScalar)>(&ApplyTransform)) |
| |
| // PathOps |
| .function("_simplify", &ApplySimplify) |
| .function("_op", &ApplyPathOp) |
| |
| // Exporting |
| .function("toCmds", &ToCmds) |
| .function("toPath2D", &ToPath2D) |
| .function("toCanvas", &ToCanvas) |
| .function("toSVGString", &ToSVGString) |
| |
| #ifdef PATHKIT_TESTING |
| .function("dump", select_overload<void() const>(&SkPath::dump)) |
| .function("dumpHex", select_overload<void() const>(&SkPath::dumpHex)) |
| #endif |
| ; |
| |
| class_<SkOpBuilder>("SkOpBuilder") |
| .constructor<>() |
| |
| .function("add", &SkOpBuilder::add) |
| .function("make", &ResolveBuilder) |
| .function("resolve", &ResolveBuilder); |
| |
| // Without these function() bindings, the function would be exposed but oblivious to |
| // our types (e.g. SkPath) |
| |
| // Import |
| function("FromSVGString", &FromSVGString); |
| function("NewPath", &NewPath); |
| function("NewPath", &CopyPath); |
| // FromCmds is defined in helper.js to make use of TypedArrays transparent. |
| function("_FromCmds", &FromCmds); |
| // Path2D is opaque, so we can't read in from it. |
| |
| // PathOps |
| function("MakeFromOp", &MakeFromOp); |
| |
| 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_<SkPath::FillType>("FillType") |
| .value("WINDING", SkPath::FillType::kWinding_FillType) |
| .value("EVENODD", SkPath::FillType::kEvenOdd_FillType) |
| .value("INVERSE_WINDING", SkPath::FillType::kInverseWinding_FillType) |
| .value("INVERSE_EVENODD", SkPath::FillType::kInverseEvenOdd_FillType); |
| |
| constant("MOVE_VERB", MOVE); |
| constant("LINE_VERB", LINE); |
| constant("QUAD_VERB", QUAD); |
| constant("CONIC_VERB", CONIC); |
| constant("CUBIC_VERB", CUBIC); |
| constant("CLOSE_VERB", CLOSE); |
| |
| // 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); |
| |
| function("LTRBRect", &SkRect::MakeLTRB); |
| |
| // Stroke |
| enum_<SkPaint::Join>("StrokeJoin") |
| .value("MITER", SkPaint::Join::kMiter_Join) |
| .value("ROUND", SkPaint::Join::kRound_Join) |
| .value("BEVEL", SkPaint::Join::kBevel_Join); |
| |
| enum_<SkPaint::Cap>("StrokeCap") |
| .value("BUTT", SkPaint::Cap::kButt_Cap) |
| .value("ROUND", SkPaint::Cap::kRound_Cap) |
| .value("SQUARE", SkPaint::Cap::kSquare_Cap); |
| |
| value_object<StrokeOpts>("StrokeOpts") |
| .field("width", &StrokeOpts::width) |
| .field("miter_limit", &StrokeOpts::miter_limit) |
| .field("join", &StrokeOpts::join) |
| .field("cap", &StrokeOpts::cap); |
| |
| // Matrix |
| // 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); |
| |
| value_array<SkPoint>("SkPoint") |
| .element(&SkPoint::fX) |
| .element(&SkPoint::fY); |
| |
| // Not intended for external clients to call directly. |
| // See helper.js for the client-facing implementation. |
| class_<SkCubicMap>("_SkCubicMap") |
| .constructor<SkPoint, SkPoint>() |
| |
| .function("computeYFromX", &SkCubicMap::computeYFromX) |
| .function("computePtFromT", &SkCubicMap::computeFromT); |
| |
| |
| // Test Utils |
| function("SkBits2FloatUnsigned", &SkBits2FloatUnsigned); |
| } |