ya-webadb/apps/demo/pages/framebuffer.tsx
2022-01-13 17:28:07 +08:00

132 lines
4.3 KiB
TypeScript

import { ICommandBarItemProps, Stack } from '@fluentui/react';
import { AdbFrameBuffer } from "@yume-chan/adb";
import { action, autorun, computed, makeAutoObservable } from "mobx";
import { observer } from "mobx-react-lite";
import { NextPage } from "next";
import Head from "next/head";
import React, { useCallback, useEffect, useRef } from 'react';
import { CommandBar, DemoMode, DeviceView } from '../components';
import { globalState } from "../state";
import { Icons, RouteStackProps } from "../utils";
class FrameBufferState {
width = 0;
height = 0;
imageData: ImageData | undefined = undefined;
demoModeVisible = false;
constructor() {
makeAutoObservable(this, {
toggleDemoModeVisible: action.bound,
});
}
setImage(image: AdbFrameBuffer) {
this.width = image.width;
this.height = image.height;
this.imageData = new ImageData(image.data, image.width, image.height);
}
toggleDemoModeVisible() {
this.demoModeVisible = !this.demoModeVisible;
}
}
const state = new FrameBufferState();
const FrameBuffer: NextPage = (): JSX.Element | null => {
const canvasRef = useRef<HTMLCanvasElement | null>(null);
const capture = useCallback(async () => {
if (!globalState.device) {
return;
}
try {
const framebuffer = await globalState.device.framebuffer();
state.setImage(framebuffer);
} catch (e) {
globalState.showErrorDialog(e instanceof Error ? e.message : `${e}`);
}
}, []);
useEffect(() => {
return autorun(() => {
const canvas = canvasRef.current;
if (canvas && state.imageData) {
canvas.width = state.width;
canvas.height = state.height;
const context = canvas.getContext("2d")!;
context.putImageData(state.imageData, 0, 0);
}
});
}, []);
const commandBarItems = computed(() => [
{
key: 'start',
disabled: !globalState.device,
iconProps: { iconName: Icons.Camera, style: { height: 20, fontSize: 20, lineHeight: 1.5 } },
text: 'Capture',
onClick: capture,
},
{
key: 'Save',
disabled: !state.imageData,
iconProps: { iconName: Icons.Save, style: { height: 20, fontSize: 20, lineHeight: 1.5 } },
text: 'Save',
onClick: () => {
const canvas = canvasRef.current;
if (!canvas) {
return;
}
const url = canvas.toDataURL();
const a = document.createElement('a');
a.href = url;
a.download = `Screenshot of ${globalState.device!.name}.png`;
a.click();
},
},
]);
const commandBarFarItems = computed((): ICommandBarItemProps[] => [
{
key: 'DemoMode',
iconProps: { iconName: Icons.Wand, style: { height: 20, fontSize: 20, lineHeight: 1.5 } },
checked: state.demoModeVisible,
text: 'Demo Mode',
onClick: state.toggleDemoModeVisible,
},
{
key: 'info',
iconProps: { iconName: Icons.Info, style: { height: 20, fontSize: 20, lineHeight: 1.5 } },
iconOnly: true,
tooltipHostProps: {
content: 'Use ADB FrameBuffer command to capture a full-size, high-resolution screenshot.',
calloutProps: {
calloutMaxWidth: 250,
}
},
}
]);
return (
<Stack {...RouteStackProps}>
<Head>
<title>Screen Capture - WebADB</title>
</Head>
<CommandBar items={commandBarItems.get()} farItems={commandBarFarItems.get()} />
<Stack horizontal grow styles={{ root: { height: 0 } }}>
<DeviceView width={state.width} height={state.height}>
<canvas ref={canvasRef} style={{ display: 'block' }} />
</DeviceView>
<DemoMode style={{ display: state.demoModeVisible ? 'block' : 'none' }} />
</Stack>
</Stack>
);
};
export default observer(FrameBuffer);