feat(webcam): canvas의 크기를 비디오 사이즈로 조정

BHyeonKim · BHyeonKim · commit a938251e053c · 2023-05-17T20:15:19.000+09:00
diff --git a/src/hooks/useWebcam.tsx b/src/hooks/useWebcam.tsx
@@ -1,5 +1,6 @@
 import { MutableRefObject, RefObject, useEffect, useRef, useState } from 'react'
 
+// &#54532;&#47112;&#51076;&#51012; &#51060;&#48120;&#51648;&#47196; &#51200;&#51109;&#54616;&#45716; &#54632;&#49688;
 export const captureFrame = (
   animationIdRef: MutableRefObject<number | undefined>,
   videoRef: RefObject<HTMLVideoElement>,
@@ -17,11 +18,28 @@ export const captureFrame = (
 }
 
 // &#48652;&#46972;&#50864;&#51200;&#50640; &#48708;&#46356;&#50724; &#54868;&#47732;&#51012; &#44536;&#47532;&#45716; &#54632;&#49688;
-const startVideo = async (videoRef: RefObject<HTMLVideoElement>) => {
+const startVideo = async (
+  videoRef: RefObject<HTMLVideoElement>,
+  canvasRef: RefObject<HTMLCanvasElement>,
+) => {
   const stream = await navigator.mediaDevices.getUserMedia({ video: true })
   if (!videoRef || !videoRef.current || videoRef.current.srcObject) return
   videoRef.current.srcObject = stream
   videoRef.current.play()
+
+  setCanvas(videoRef, canvasRef)
+}
+
+// &#48708;&#46356;&#50724;&#51032; &#53356;&#44592;&#50640; &#46384;&#47480; Canvas&#51032; &#53356;&#44592;&#47484; &#49444;&#51221;&#54616;&#45716; &#54632;&#49688;
+const setCanvas = (
+  videoRef: RefObject<HTMLVideoElement>,
+  canvasRef: RefObject<HTMLCanvasElement>,
+) => {
+  videoRef.current?.addEventListener('loadedmetadata', () => {
+    if (!canvasRef.current || !videoRef.current) return
+    canvasRef.current.width = videoRef.current.videoWidth
+    canvasRef.current.height = videoRef.current.videoHeight
+  })
 }
 
 const useWebcam = (videoRef: RefObject<HTMLVideoElement>) => {
@@ -30,7 +48,7 @@ const useWebcam = (videoRef: RefObject<HTMLVideoElement>) => {
   const [isCapturing, setIsCapturing] = useState(false)
 
   useEffect(() => {
-    startVideo(videoRef)
+    startVideo(videoRef, canvasRef)
 
     if (isCapturing) {
       animationFrameId.current = captureFrame(
