Scale and crop background on user details screen so to respect the aspect...

Scale and crop background on user details screen so to respect the aspect ratio of the original image

app/src/main/java/chat/rocket/android/userdetails/ui/UserDetailsActivity.kt

@@ -109,7 +109,9 @@ class UserDetailsActivity : AppCompatActivity(), UserDetailsView, HasSupportFrag
                     .get().also { showLoadingView(false) }
             }
 
-            toolbar.background = BitmapDrawable(resources, image.blurred(this@UserDetailsActivity))
+            val blurredBitmap = image.blurred(context = this@UserDetailsActivity,
+                newWidth = toolbar.measuredWidth, newHeight =  toolbar.measuredHeight)
+            toolbar.background = BitmapDrawable(resources, blurredBitmap)
             GlideApp.with(this@UserDetailsActivity)
                 .asBitmap()
                 .transforms(RoundedCorners(25), CenterCrop())

app/src/main/java/chat/rocket/android/util/extensions/Graphics.kt

@@ -6,14 +6,22 @@ import android.renderscript.RenderScript
 import android.renderscript.ScriptIntrinsicBlur
 
 
-fun Bitmap.blurred(context: Context, intensity: Float = 25f): Bitmap {
+fun Bitmap.blurred(context: Context, intensity: Float = 25f, newWidth: Int = -1, newHeight: Int = -1): Bitmap {
     if (intensity <= 0 || intensity > 25) {
         throw IllegalStateException("Intensity out of range (0 < intensity <= 25).")
     }
-    val bitmap = copy(config, true)
-
+    val nonScaledBitmap = copy(config, true)
+    val bitmap = if (newWidth > 0 && newHeight > 0) {
+        val height = nonScaledBitmap.height
+        val width = nonScaledBitmap.width
+        val aspectRadio = width / height
+        val adjustedWidth = newHeight * aspectRadio
+        val adjustedHeight = newWidth * height / width
+        val scaledBitmap = Bitmap.createScaledBitmap(nonScaledBitmap, adjustedWidth, adjustedHeight, false)
+        Bitmap.createBitmap(scaledBitmap, 0, 0, adjustedWidth, newHeight)
+    } else nonScaledBitmap
     val rs = RenderScript.create(context)
-    val input = Allocation.createFromBitmap(rs, this, Allocation.MipmapControl.MIPMAP_NONE,
+    val input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_NONE,
         Allocation.USAGE_SCRIPT)
     val output = Allocation.createTyped(rs, input.type)
     val script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs))