Merge pull request #1 from macabeus/refac/splitting-repository

Convert original codebase into an isolated package

.gitignore

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+node_modules
+dist

.npmignore

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+node_modules
+dist
+sample

README.md

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+# react-gbajs
+
+> GBA emulator on your React project - easy and powerful to use!
+
+Just three steps to set it up ✨
+
+1 - Apply `GbaProvider`
+```jsx
+import { GbaProvider } from 'react-gbajs'
+
+const App = () => (
+  <GbaProvider>
+    ...
+  </GbaProvider>
+)
+```
+
+2 - Get `play` function from `GbaContext` and call it with the game ROM
+```jsx
+import { useContext } from 'react'
+import { GbaContext } from 'react-gbajs'
+
+const Component = () => {
+  const {
+    play,
+  } = useContext(GbaContext)
+
+  const onSomeHandle = () => {
+    const gameRom = getGameRom()
+    play(gameRom)
+  }
+
+  return (
+    <SomeComponent startGame={onSomeHandle}>
+  )
+}
+```
+
+3 - And render the emulator using the default export
+
+```js
+import ReactGbaJs from 'react-gbajs'
+
+const Emulator = () => (
+  <ReactGbaJs volume={0} />
+)
+```
+
+Check a full example in [`/sample`](sample).
+
+## How it works
+
+This package is a React wrapper for [GBA.js](https://github.com/endrift/gbajs).
+
+`GBA.js` is vendored, with new features over the original version:
+- save and restore state
+- freeze address with a given value
+
+## Who is using
+
+<table align="center">
+    <tr>
+        <td align="center" width="50%">
+          <img src="https://i.imgur.com/QxCoVPh.png"><br />
+          <strong><a href="https://github.com/macabeus/klo-gba.js">klo-gba.js</a></strong>, level editor for <strong>Klonoa: Empire of Dreams<strong>
+        </td>
+        <td align="center" width="50%">
+          <i><a href="https://github.com/macabeus/react-gbajs/issues/new">Add your project here</a></i>
+        </td>
+    </tr>
+</table>
+
+## Features
+
+`GbaContext` exports the following properties:
+
+#### `play(newRomBufferMemory)`
+
+Use this method to play the emulator, passing as its argument the game's ROM. Every time this function is called, it creates a new `GameBoyAdvance` instance, so all game progress is lost.
+
+#### `saveState()`
+
+Return the serializable state of the emulator.
+
+#### `updateState({ restoreState, newRomBuffer })`
+
+Use this function passing `restoreState` to restore to a previous state saved using `saveState`. You can also pass `newRomBuffer` to reset the emulator and then load a new ROM. If both are passed, the emulator will be reset with the new ROM and then restored to the given state.
+
+#### `addFreezeAddress({ address: number, size: 8 | 16 | 32, value: number })`
+
+Freeze an address with the given value.
+
+#### `removeFreezeAddress(address: number)`
+
+Remove the freeze value on the given address.
+
+#### `frozenAddresses()`
+
+Return the list of the addresses frozen in the following format:
+
+```ts
+{
+  [address in number]: { size: 8 | 16 | 32, value: number }
+}
+```
+
+# Contribution
+
+1 - Clone this repository
+
+```
+> git clone git@github.com:macabeus/react-gbajs.git
+> cd react-gbajs
+```
+
+2 - Build and watch the project
+
+```
+> npm run start
+```
+
+3 - In another terminal window, go to the [`/sample`](sample) project, then build and watch it
+
+```
+> cd sample
+> npm run start
+```
+
+Finished! Now you can develop the package and test it in real-time 🎉