MediaView: Move HDR gain map reading to IO.

It should help with media view scrolling lag (#578, #518) Signed-off-by: IacobIonut01 <[email protected]>
IacobIonut01 · Feb 4, 2025 · 8afe53e · 8afe53e
1 parent 4df3d45
commit 8afe53e
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/app/src/main/kotlin/com/dot/gallery/feature_node/presentation/mediaview/MediaViewScreen.kt b/app/src/main/kotlin/com/dot/gallery/feature_node/presentation/mediaview/MediaViewScreen.kt
@@ -325,6 +325,7 @@ fun <T : Media> MediaViewScreen(
     // set HDR Gain map
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
         LaunchedEffect(mediaState.value) {
+            withContext(Dispatchers.IO) {
             snapshotFlow { pagerState.currentPage }.collectLatest {
                 printWarning("Trying to set HDR mode for page $it")
                 if (currentMedia?.isImage == true) {
@@ -338,17 +339,20 @@ fun <T : Media> MediaViewScreen(
                             value = currentMedia?.mimeType,
                         )
                     }
-                    val result = withContext(Dispatchers.IO) {
-                        context.sketch.execute(request)
-                    }
+                        val result = context.sketch.execute(request)
                     (result.image as? BitmapImage)?.bitmap?.let { bitmap ->
                         val hasGainmap = bitmap.hasGainmap()
+                            withContext(Dispatchers.Main.immediate) {
                         context.setHdrMode(hasGainmap)
+                            }
                         printWarning("Setting HDR Mode to $hasGainmap")
                     } ?: printWarning("Resulting image null")
                 } else {
+                        withContext(Dispatchers.Main.immediate) {
                     context.setHdrMode(false)
+                        }
                     printWarning("Not an image, skipping")
+                    }
                 }
             }
         }