48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
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/*
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* Copyright 2021 Google LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SKIA_BINDINGS_H
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#define SKIA_BINDINGS_H
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#include <emscripten.h>
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#include <emscripten/bind.h>
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using namespace emscripten;
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// The following two macros allow for the generation of various support files to create
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// Canvaskit. The code inside the parentheses should be the Typescript declaration of whatever
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// the following line or lines of code are describing. There are 3 types of files created, the
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// ambient namespace files (e.g. core.d.ts; the public and private JS functions exposed by embind),
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// externs.js (used to tell the Closure compiler not to minify certain names in the interface
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// code) and the API Summary doc (index.d.ts). Types declared with TS_PRIVATE_EXPORT will
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// only appear in the first two; TS_EXPORT will show up in all three.
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//
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// Because TS_EXPORT will show up in the public API docs, it is required that all TS_EXPORT
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// declarations are preceded by docs starting with /** that will be copied into the final API
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// summary doc, otherwise the generation step will fail.
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//
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// The declarations will be normal TS, with the exception of having a ClassName:: as a prefix if
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// we are exposing a method on a class. This lets us properly group methods together.
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//
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// As an example:
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//
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// TS_PRIVATE_EXPORT("_privateFunction(x: number, y: number): number")
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// function("_privateFunction", optional_override([](int x, int y)->size_t {
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// return x * y;
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// }));
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//
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// /** See SkCanvas.h for more on this class */
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// class_<SkCanvas>("Canvas")
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// /**
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// * Draw the given paint using the current matrix and cli.
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// * @param p a paint to draw.
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// */
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// TS_EXPORT("Canvas::drawPaint(p: Paint): void")
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// .function("drawPaint", &SkCanvas::drawPaint)
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#define TS_PRIVATE_EXPORT(ts_code)
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#define TS_EXPORT(ts_code)
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#endif // SKIA_BINDINGS_H
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