Merge pull request #56 from tconns/fix/thumbhash-android

fix: 🐛 thumbhash android
candlefinance · Sep 13, 2024 · 14e0422 · 14e0422
2 parents 3773c7a + b3eb118
commit 14e0422
Showing 1 changed file with 10 additions and 10 deletions.
diff --git a/android/src/main/java/com/candlefinance/fasterimage/FasterImageViewManager.kt b/android/src/main/java/com/candlefinance/fasterimage/FasterImageViewManager.kt
@@ -230,17 +230,17 @@ import com.facebook.react.uimanager.events.RCTEventEmitter
 
       private fun makeThumbHash(view: AppCompatImageView, hash: String): Drawable {
         val thumbHash = ThumbHash.thumbHashToRGBA(Base64.decode(hash, Base64.DEFAULT))
-        val bitmap = Bitmap.createBitmap(thumbHash.width, thumbHash.height, Bitmap.Config.ARGB_8888)
-        bitmap.setPixels(toIntArray(thumbHash.rgba), 0, thumbHash.width, 0, 0, thumbHash.width, thumbHash.height)
-        return BitmapDrawable(view.context.resources, bitmap)
-      }
-
-      private fun toIntArray(byteArray: ByteArray): IntArray {
-        val intArray = IntArray(byteArray.size)
-        for (i in byteArray.indices) {
-          intArray[i] = byteArray[i].toInt() and 0xFF
+        val intArray = IntArray(thumbHash.width * thumbHash.height)
+        for (i in intArray.indices) {
+          val r = thumbHash.rgba[i * 4].toInt() and 0xFF
+          val g = thumbHash.rgba[i * 4 + 1].toInt() and 0xFF
+          val b = thumbHash.rgba[i * 4 + 2].toInt() and 0xFF
+          val a = thumbHash.rgba[i * 4 + 3].toInt() and 0xFF
+          intArray[i] =
+            ((a and 0xff) shl 24) or ((r and 0xff) shl 16) or ((g and 0xff) shl 8) or (b and 0xff)
         }
-        return intArray
+        val bitmap = Bitmap.createBitmap(intArray, thumbHash.width, thumbHash.height, Bitmap.Config.ARGB_8888)
+        return BitmapDrawable(view.context.resources, bitmap)
       }
 
     companion object {