Vladimir Mazunin
2 years ago
committed by
GitHub
13 changed files with 269 additions and 52 deletions
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package example.imageviewer.view |
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import androidx.compose.foundation.background |
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import androidx.compose.foundation.layout.Box |
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import androidx.compose.foundation.layout.fillMaxSize |
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import androidx.compose.material3.Text |
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import androidx.compose.runtime.Composable |
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import androidx.compose.ui.Alignment |
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import androidx.compose.ui.Modifier |
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import androidx.compose.ui.graphics.Color |
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@Composable |
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internal actual fun CameraView(modifier: Modifier) { |
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Box(Modifier.fillMaxSize().background(Color.Black)) { |
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Text( |
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text = "Camera is not available on Android for now.", |
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color = Color.White, |
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modifier = Modifier.align(Alignment.Center) |
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) |
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} |
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} |
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@ -1,19 +1,27 @@
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package example.imageviewer.view |
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import androidx.compose.foundation.background |
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import androidx.compose.foundation.clickable |
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import androidx.compose.foundation.layout.Box |
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import androidx.compose.foundation.layout.fillMaxSize |
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import androidx.compose.material3.Text |
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import androidx.compose.foundation.layout.* |
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import androidx.compose.runtime.Composable |
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import androidx.compose.ui.Alignment |
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import androidx.compose.ui.Modifier |
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import androidx.compose.ui.graphics.Color |
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import androidx.compose.ui.text.style.TextAlign |
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import example.imageviewer.Localization |
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import org.jetbrains.compose.resources.ExperimentalResourceApi |
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import org.jetbrains.compose.resources.painterResource |
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@OptIn(ExperimentalResourceApi::class) |
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@Composable |
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internal fun CameraScreen(onBack: () -> Unit) { |
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Box(Modifier.fillMaxSize().background(Color.Black).clickable { onBack() }, contentAlignment = Alignment.Center) { |
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Text("Nothing here yet 📸", textAlign = TextAlign.Center, color = Color.White) |
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internal fun CameraScreen(localization: Localization, onBack: () -> Unit) { |
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Box(Modifier.fillMaxSize()) { |
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CameraView(Modifier.fillMaxSize()) |
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TopLayout( |
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alignLeftContent = { |
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Tooltip(localization.back) { |
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CircularButton( |
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painterResource("arrowleft.png"), |
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onClick = { onBack() } |
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) |
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} |
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}, |
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alignRightContent = {}, |
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) |
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} |
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} |
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} |
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@ -0,0 +1,7 @@
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package example.imageviewer.view |
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import androidx.compose.runtime.Composable |
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import androidx.compose.ui.Modifier |
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@Composable |
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internal expect fun CameraView(modifier: Modifier) |
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@ -0,0 +1,21 @@
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package example.imageviewer.view |
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import androidx.compose.foundation.background |
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import androidx.compose.foundation.layout.Box |
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import androidx.compose.foundation.layout.fillMaxSize |
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import androidx.compose.material3.Text |
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import androidx.compose.runtime.Composable |
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import androidx.compose.ui.Alignment |
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import androidx.compose.ui.Modifier |
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import androidx.compose.ui.graphics.Color |
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@Composable |
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internal actual fun CameraView(modifier: Modifier) { |
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Box(Modifier.fillMaxSize().background(Color.Black)) { |
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Text( |
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text = "Camera is not available on Desktop for now.", |
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color = Color.White, |
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modifier = Modifier.align(Alignment.Center) |
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) |
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} |
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} |
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@ -0,0 +1,176 @@
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package example.imageviewer.view |
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import androidx.compose.foundation.background |
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import androidx.compose.foundation.layout.Box |
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import androidx.compose.foundation.layout.BoxScope |
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import androidx.compose.foundation.layout.fillMaxSize |
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import androidx.compose.foundation.layout.padding |
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import androidx.compose.material3.* |
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import androidx.compose.runtime.* |
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import androidx.compose.ui.Alignment |
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import androidx.compose.ui.Modifier |
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import androidx.compose.ui.graphics.Color |
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import androidx.compose.ui.interop.UIKitInteropView |
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import androidx.compose.ui.unit.dp |
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import kotlinx.cinterop.CValue |
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import platform.AVFoundation.* |
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import platform.AVFoundation.AVCaptureDeviceDiscoverySession.Companion.discoverySessionWithDeviceTypes |
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import platform.AVFoundation.AVCaptureDeviceInput.Companion.deviceInputWithDevice |
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import platform.CoreGraphics.CGRect |
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import platform.Foundation.NSError |
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import platform.QuartzCore.CATransaction |
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import platform.QuartzCore.kCATransactionDisableActions |
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import platform.UIKit.UIDevice |
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import platform.UIKit.UIDeviceOrientation |
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import platform.UIKit.UIImage |
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import platform.UIKit.UIView |
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import platform.darwin.NSObject |
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private sealed interface CameraAccess { |
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object Undefined : CameraAccess |
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object Denied : CameraAccess |
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object Authorized : CameraAccess |
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} |
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@Composable |
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internal actual fun CameraView(modifier: Modifier) { |
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var cameraAccess: CameraAccess by remember { mutableStateOf(CameraAccess.Undefined) } |
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LaunchedEffect(Unit) { |
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when (AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo)) { |
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AVAuthorizationStatusAuthorized -> { |
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cameraAccess = CameraAccess.Authorized |
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} |
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AVAuthorizationStatusDenied, AVAuthorizationStatusRestricted -> { |
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cameraAccess = CameraAccess.Denied |
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} |
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AVAuthorizationStatusNotDetermined -> { |
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AVCaptureDevice.requestAccessForMediaType( |
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mediaType = AVMediaTypeVideo |
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) { success -> |
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cameraAccess = if (success) CameraAccess.Authorized else CameraAccess.Denied |
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} |
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} |
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} |
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} |
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Box( |
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Modifier.fillMaxSize().background(Color.Black), |
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contentAlignment = Alignment.Center |
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) { |
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when (cameraAccess) { |
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CameraAccess.Undefined -> { |
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// Waiting for the user to accept permission |
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} |
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CameraAccess.Denied -> { |
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Text("Camera access denied", color = Color.White) |
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} |
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CameraAccess.Authorized -> { |
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AuthorizedCamera() |
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} |
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} |
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} |
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} |
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@Composable |
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private fun BoxScope.AuthorizedCamera() { |
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val capturePhotoOutput = remember { AVCapturePhotoOutput() } |
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val photoCaptureDelegate = remember { |
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object : NSObject(), AVCapturePhotoCaptureDelegateProtocol { |
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override fun captureOutput( |
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output: AVCapturePhotoOutput, |
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didFinishProcessingPhoto: AVCapturePhoto, |
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error: NSError? |
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) { |
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val photoData = didFinishProcessingPhoto.fileDataRepresentation() |
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?: error("fileDataRepresentation is null") |
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val uiImage = UIImage(photoData) |
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//todo pass image to gallery page |
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} |
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} |
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} |
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val camera: AVCaptureDevice? = remember { |
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discoverySessionWithDeviceTypes( |
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deviceTypes = listOf(AVCaptureDeviceTypeBuiltInWideAngleCamera), |
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mediaType = AVMediaTypeVideo, |
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position = AVCaptureDevicePositionFront, |
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).devices.firstOrNull() as? AVCaptureDevice |
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} |
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if (camera != null) { |
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val captureSession: AVCaptureSession = remember { |
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AVCaptureSession().also { captureSession -> |
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captureSession.sessionPreset = AVCaptureSessionPresetPhoto |
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val captureDeviceInput: AVCaptureDeviceInput = |
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deviceInputWithDevice(device = camera, error = null)!! |
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captureSession.addInput(captureDeviceInput) |
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captureSession.addOutput(capturePhotoOutput) |
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} |
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} |
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val cameraPreviewLayer = remember { |
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AVCaptureVideoPreviewLayer(session = captureSession) |
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} |
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UIKitInteropView( |
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modifier = Modifier.fillMaxSize(), |
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background = Color.Black, |
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resize = { view: UIView, rect: CValue<CGRect> -> |
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cameraPreviewLayer.connection?.apply { |
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videoOrientation = when (UIDevice.currentDevice.orientation) { |
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UIDeviceOrientation.UIDeviceOrientationPortrait -> |
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AVCaptureVideoOrientationPortrait |
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UIDeviceOrientation.UIDeviceOrientationLandscapeLeft -> |
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AVCaptureVideoOrientationLandscapeRight |
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UIDeviceOrientation.UIDeviceOrientationLandscapeRight -> |
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AVCaptureVideoOrientationLandscapeLeft |
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UIDeviceOrientation.UIDeviceOrientationPortraitUpsideDown -> |
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AVCaptureVideoOrientationPortraitUpsideDown |
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else -> videoOrientation |
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} |
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} |
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CATransaction.begin() |
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CATransaction.setValue(true, kCATransactionDisableActions) |
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view.layer.setFrame(rect) |
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cameraPreviewLayer.setFrame(rect) |
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CATransaction.commit() |
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}, |
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) { |
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val cameraContainer = UIView() |
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cameraContainer.layer.addSublayer(cameraPreviewLayer) |
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cameraPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill |
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captureSession.startRunning() |
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cameraContainer |
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} |
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Button( |
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modifier = Modifier.align(Alignment.BottomCenter).padding(20.dp), |
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onClick = { |
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val photoSettings = AVCapturePhotoSettings.photoSettingsWithFormat( |
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format = mapOf(AVVideoCodecKey to AVVideoCodecTypeJPEG) |
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) |
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photoSettings.setHighResolutionPhotoEnabled(true) |
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capturePhotoOutput.setHighResolutionCaptureEnabled(true) |
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capturePhotoOutput.capturePhotoWithSettings( |
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settings = photoSettings, |
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delegate = photoCaptureDelegate |
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) |
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}) { |
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Text("Compose Button - take a photo 📸") |
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} |
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} else { |
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SimulatorStub() |
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} |
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} |
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@Composable |
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private fun SimulatorStub() { |
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Text( |
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""" |
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Camera is not available on simulator. |
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Please try to run on a real iOS device. |
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""".trimIndent(), color = Color.White |
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) |
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} |
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