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Commit cd0a68e5 authored by Aurélien Pomini's avatar Aurélien Pomini
Browse files

More fine-grained sampling 

Flag: android.app.accurate_wallpaper_downsampling
Bug: 355665230
Test: atest WallpaperManagerTest
Change-Id: I25ff8a85d07bfd000935865a455a9198179c5a4b
parent 86b7e8d0

core/java/android/app/wallpaper.aconfig

+10 −0
Original line number Diff line number Diff line
@@ -30,3 +30,13 @@ flag { 
    description: "Move APIs related to bitmap and crops to @SystemApi."

    bug: "372344184"

}



flag {

  name: "accurate_wallpaper_downsampling"

  namespace: "systemui"

  description: "Accurate downsampling of wallpaper bitmap for high resolution images"

  bug: "355665230"

  metadata {

    purpose: PURPOSE_BUGFIX

  }

}

services/core/java/com/android/server/wallpaper/WallpaperCropper.java

+14 −1
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ package com.android.server.wallpaper; 
import static android.app.WallpaperManager.ORIENTATION_UNKNOWN;

import static android.app.WallpaperManager.getOrientation;

import static android.app.WallpaperManager.getRotatedOrientation;

import static android.app.Flags.accurateWallpaperDownsampling;

import static android.view.Display.DEFAULT_DISPLAY;



import static com.android.server.wallpaper.WallpaperUtils.RECORD_FILE;
@@ -378,7 +379,14 @@ public class WallpaperCropper { 
        for (int i = 0; i < wallpaper.mCropHints.size(); i++) {

            Rect adjustedRect = new Rect(wallpaper.mCropHints.valueAt(i));

            adjustedRect.offset(-wallpaper.cropHint.left, -wallpaper.cropHint.top);

            if (accurateWallpaperDownsampling()) {

                adjustedRect.left = (int) (0.5f + adjustedRect.left / wallpaper.mSampleSize);

                adjustedRect.top = (int) (0.5f + adjustedRect.top / wallpaper.mSampleSize);

                adjustedRect.right = (int) Math.floor(adjustedRect.right / wallpaper.mSampleSize);

                adjustedRect.bottom = (int) Math.floor(adjustedRect.bottom / wallpaper.mSampleSize);

            } else {

                adjustedRect.scale(1f / wallpaper.mSampleSize);

            }

            result.put(wallpaper.mCropHints.keyAt(i), adjustedRect);

        }

        return result;
@@ -603,6 +611,11 @@ public class WallpaperCropper { 
                    float sampleSizeForThisOrientation = Math.max(1f, Math.min(

                            crop.width() / displayForThisOrientation.x,

                            crop.height() / displayForThisOrientation.y));

                    if (accurateWallpaperDownsampling()) {

                        sampleSizeForThisOrientation = Math.max(1f, Math.min(

                                (float) crop.width() / displayForThisOrientation.x,

                                (float) crop.height() / displayForThisOrientation.y));

                    }

                    sampleSize = Math.min(sampleSize, sampleSizeForThisOrientation);

                }

                // If the total crop has more width or height than either the max texture size