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[Sample] [Graphics] [Compose] UltraHDR image rendering in Compose. (#89)
* Render an UltraHDR image in Compose. Added two views (ImageView (Regular android view)) and Image (Compose)) to display functionality and support of rendering an ultrahdr. * (1) Loading asset and image decoding on a background thread (2) Add activity color mode controls for hdr and sdr (3) Remove fragment class and use the Sample annotation (4) Resolve minor readability comments * Removed dependencies which are not required * Update DisplayUltraHDRScreen logic to be Compose friendly (#116) * Update DisplayUltraHDRScreen logic to be Compose friendly * Add ImageView below to Compose Image composable Fetch colorMode details when screen is rendered * Update README.md --------- Co-authored-by: Yacine Rezgui <[email protected]>
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...hdr/src/main/java/com/example/platform/graphics/ultrahdr/display/DisplayUltraHDRScreen.kt
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| /* | ||
| * Copyright 2023 The Android Open Source Project | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.example.platform.graphics.ultrahdr.display | ||
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| import android.app.Activity | ||
| import android.content.Context | ||
| import android.content.ContextWrapper | ||
| import android.content.pm.ActivityInfo | ||
| import android.graphics.Bitmap | ||
| import android.graphics.BitmapFactory | ||
| import android.os.Build | ||
| import android.util.Log | ||
| import android.view.Display | ||
| import android.view.Window | ||
| import android.widget.ImageView | ||
| import androidx.annotation.RequiresApi | ||
| import androidx.compose.foundation.Image | ||
| import androidx.compose.foundation.layout.Arrangement | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.Row | ||
| import androidx.compose.foundation.layout.Spacer | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.layout.width | ||
| import androidx.compose.material3.Button | ||
| import androidx.compose.material3.Divider | ||
| import androidx.compose.material3.MaterialTheme | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.DisposableEffect | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.asImageBitmap | ||
| import androidx.compose.ui.platform.LocalContext | ||
| import androidx.compose.ui.platform.LocalView | ||
| import androidx.compose.ui.res.dimensionResource | ||
| import androidx.compose.ui.res.stringResource | ||
| import androidx.compose.ui.unit.dp | ||
| import androidx.compose.ui.viewinterop.AndroidView | ||
| import androidx.compose.ui.window.DialogWindowProvider | ||
| import com.example.platform.graphics.ultrahdr.R | ||
| import com.google.android.catalog.framework.annotations.Sample | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.withContext | ||
| import java.util.function.Consumer | ||
|
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||
| @RequiresApi(34) | ||
| @Sample( | ||
| name = "Displaying UltraHDR (Compose)", | ||
| description = "This sample demonstrates displaying an UltraHDR image in a Compose View and an Android View", | ||
| documentation = "https://developer.android.com/guide/topics/media/hdr-image-format", | ||
| tags = ["UltraHDR", "Compose"], | ||
| ) | ||
|
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| @Composable | ||
| fun DisplayUltraHDRScreen() { | ||
| var bitmap by remember { mutableStateOf<Bitmap?>(null) } | ||
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| val context = LocalContext.current | ||
| var colorMode by remember { mutableStateOf<ColorMode>(ColorMode.Default) } | ||
| val window = findWindow() | ||
| val display = LocalView.current.display | ||
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| // Load asset and bitmap on background thread | ||
| LaunchedEffect(Unit) { | ||
| window?.let { | ||
| colorMode = getColorMode(it, display) | ||
| } | ||
|
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| // Same bitmap is used to load image in an image view and image (Compose) | ||
| bitmap = withContext(Dispatchers.IO) { | ||
| val ultraHdrImage = "gainmaps/night_highrise.jpg" | ||
| context.assets.open(ultraHdrImage).use { inputStream -> | ||
| BitmapFactory.decodeStream(inputStream) | ||
| } | ||
| } | ||
| } | ||
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| val hdrSdrRatioChangeListener = Consumer<Display> { display -> | ||
| if (window == null) return@Consumer | ||
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| Log.d(TAG, "HDR/SDR Ratio Changed ${display.hdrSdrRatio}") | ||
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| colorMode = getColorMode(window, display) | ||
| } | ||
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| DisposableEffect(window, display) { | ||
| if (display.isHdrSdrRatioAvailable) { | ||
| display.registerHdrSdrRatioChangedListener( | ||
| { executable -> executable.run() }, | ||
| hdrSdrRatioChangeListener, | ||
| ) | ||
| } | ||
| // When the effect leaves the Composition, remove the observer | ||
| onDispose { | ||
| display.unregisterHdrSdrRatioChangedListener(hdrSdrRatioChangeListener) | ||
| } | ||
| } | ||
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| Column( | ||
| modifier = Modifier.fillMaxWidth(), | ||
| verticalArrangement = Arrangement.SpaceEvenly, | ||
| horizontalAlignment = Alignment.CenterHorizontally, | ||
| ) { | ||
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| val details = when (colorMode) { | ||
| is ColorMode.Default -> stringResource(R.string.color_mode_sdr) | ||
| is ColorMode.Unknown -> stringResource(R.string.color_mode_unknown) | ||
| is ColorMode.Hdr -> stringResource( | ||
| R.string.color_mode_hdr_with_ratio, | ||
| (colorMode as ColorMode.Hdr).hdrSdrRatio, | ||
| ) | ||
| } | ||
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| Text(stringResource(R.string.color_mode_details, details)) | ||
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| // Add SDR/HDR Color mode controls | ||
| Row( | ||
| horizontalArrangement = Arrangement.Center, | ||
| modifier = Modifier.padding(dimensionResource(R.dimen.ultrahdr_color_mode_current_mode_padding)), | ||
| ) { | ||
| Button( | ||
| modifier = Modifier.weight(1f), | ||
| onClick = { window?.colorMode = ActivityInfo.COLOR_MODE_DEFAULT }, | ||
| ) { | ||
| Text(stringResource(R.string.color_mode_sdr)) | ||
| } | ||
| Spacer(Modifier.width(dimensionResource(R.dimen.ultrahdr_color_mode_current_mode_padding))) | ||
| Button( | ||
| modifier = Modifier.weight(1f), | ||
| onClick = { window?.colorMode = ActivityInfo.COLOR_MODE_HDR }, | ||
| ) { | ||
| Text(stringResource(R.string.color_mode_hdr)) | ||
| } | ||
| } | ||
|
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| // Render UltraHDR in a Compose Image | ||
| Text(text = "Image (Compose)") | ||
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| if (bitmap != null) { | ||
| Image( | ||
| bitmap = bitmap!!.asImageBitmap(), | ||
| contentDescription = null, | ||
| modifier = Modifier.weight(1f), | ||
| ) | ||
| } | ||
|
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| Divider( | ||
| modifier = Modifier | ||
| .fillMaxWidth() | ||
| .padding(vertical = 4.dp), | ||
| thickness = 1.dp, | ||
| color = MaterialTheme.colorScheme.primary, | ||
| ) | ||
|
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| // Render UltraHDR in View (ImageView) | ||
| Text(text = "ImageView (Android View)") | ||
| AndroidView( | ||
| modifier = Modifier.weight(1f), | ||
| factory = { | ||
| ImageView(it).apply { | ||
| setImageBitmap(bitmap) | ||
| } | ||
| }, | ||
| update = { | ||
| it.setImageBitmap(bitmap) | ||
| }, | ||
| ) | ||
| } | ||
| } | ||
|
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| private const val TAG = "DisplayUltraHDRScreen" | ||
|
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| private sealed interface ColorMode { | ||
| object Default : ColorMode | ||
| object Unknown : ColorMode | ||
|
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| @JvmInline | ||
| value class Hdr(val hdrSdrRatio: Float) : ColorMode | ||
| } | ||
|
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| @Composable | ||
| private fun findWindow(): Window? = | ||
| (LocalView.current.parent as? DialogWindowProvider)?.window ?: LocalContext.current.findWindow() | ||
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| private tailrec fun Context.findWindow(): Window? = | ||
| when (this) { | ||
| is Activity -> window | ||
| is ContextWrapper -> baseContext.findWindow() | ||
| else -> null | ||
| } | ||
|
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| @RequiresApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE) | ||
| private fun getColorMode(window: Window, display: Display) = when (window.colorMode) { | ||
| ActivityInfo.COLOR_MODE_DEFAULT -> ColorMode.Default | ||
| ActivityInfo.COLOR_MODE_HDR -> ColorMode.Hdr(display.hdrSdrRatio) | ||
| else -> ColorMode.Unknown | ||
| } |
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