base: Let's shrink file headers bigger than the device size

Custom headers and new cameras with bigger resolution sizes aren't a good match.
This might put a stop to those who put a 4K image as their header and complains about SysUI struggling :)

Change-Id: I4a9ade0008f532d84160f44c57efdaa3e1fdeb30
Signed-off-by: NurKeinNeid <mralexman3000@gmail.com>

Author: eldainosor

core/java/com/android/internal/util/fh/ImageHelper.java

@@ -55,10 +55,12 @@
 import android.renderscript.Allocation;
 import android.renderscript.ScriptIntrinsicBlur;
 import android.renderscript.RenderScript;
+import android.util.DisplayMetrics;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.TypedValue;
 import android.util.Xml;
+import android.view.WindowManager;
 
 public class ImageHelper {
     private static final int VECTOR_WIDTH = 512;
@@ -174,6 +176,42 @@ public static Drawable resize(Context context, Drawable image, int size) {
         }
     }
 
+    public static Bitmap resizeMaxDeviceSize(Context context, Drawable image) {
+        Bitmap i2b = ((BitmapDrawable) image).getBitmap();
+        return resizeMaxDeviceSize(context, i2b);
+    }
+
+    public static Bitmap resizeMaxDeviceSize(Context context, Bitmap image) {
+        Bitmap imageToBitmap;
+        DisplayMetrics metrics = new DisplayMetrics();
+        WindowManager wm = context.getSystemService(WindowManager.class);
+        wm.getDefaultDisplay().getRealMetrics(metrics);
+        int maxHeight = metrics.heightPixels;
+        int maxWidth = metrics.widthPixels;
+        try {
+            imageToBitmap = RGB565toARGB888(image);
+            if (maxHeight > 0 && maxWidth > 0) {
+                int width = imageToBitmap.getWidth();
+                int height = imageToBitmap.getHeight();
+                float ratioBitmap = (float) width / (float) height;
+                float ratioMax = (float) maxWidth / (float) maxHeight;
+
+                int finalWidth = maxWidth;
+                int finalHeight = maxHeight;
+                if (ratioMax > ratioBitmap) {
+                    finalWidth = (int) ((float)maxHeight * ratioBitmap);
+                } else {
+                    finalHeight = (int) ((float)maxWidth / ratioBitmap);
+                }
+                imageToBitmap = Bitmap.createScaledBitmap(imageToBitmap, finalWidth, finalHeight, true);
+                return imageToBitmap;
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+        return image;
+    }
+
     public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
         if (bitmap == null) {
             return null;

packages/SystemUI/src/com/android/systemui/fh/header/FileHeaderProvider.java

@@ -37,6 +37,7 @@
 import java.io.InputStream;
 import java.util.Calendar;
 
+import com.android.internal.util.fh.ImageHelper;
 import com.android.systemui.R;
 
 public class FileHeaderProvider implements
@@ -115,7 +116,7 @@ private void loadHeaderImage() {
         if (file.exists()) {
             if (DEBUG) Log.i(TAG, "Load header image");
             final Bitmap image = BitmapFactory.decodeFile(file.getAbsolutePath());
-            mImage = new BitmapDrawable(mContext.getResources(), image);
+            mImage = new BitmapDrawable(mContext.getResources(), ImageHelper.resizeMaxDeviceSize(mContext, image));
         }
     }