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Implment local color extraction for image wallpapers

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Fixes: 182480441
Test: ImageWallpaperTest
Change-Id: Ia3ce8a3e5d7bc39fa00850d2fdcf67e0d40d46c2
This commit is contained in:
Jay Aliomer
2021-03-11 13:16:15 -05:00
parent 8b685d078e
commit ef842426ed
1 changed files with 91 additions and 4 deletions
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95
packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
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@@ -25,9 +25,12 @@ import android.os.HandlerThread;
import android.os.SystemClock;
import android.os.Trace;
import android.service.wallpaper.WallpaperService;
import android.util.ArraySet;
import android.util.Log;
import android.util.MathUtils;
import android.util.Size;
import android.view.SurfaceHolder;
import android.view.WindowManager;
import androidx.annotation.NonNull;
@@ -54,7 +57,10 @@ public class ImageWallpaper extends WallpaperService {
private static final @android.annotation.NonNull RectF LOCAL_COLOR_BOUNDS =
new RectF(0, 0, 1, 1);
private static final boolean DEBUG = false;
private ArrayList<RectF> mLocalColorsToAdd = new ArrayList<>();
private final ArrayList<RectF> mLocalColorsToAdd = new ArrayList<>();
private final ArraySet<RectF> mColorAreas = new ArraySet<>();
private float mShift;
private volatile int mPages;
private HandlerThread mWorker;
// scaled down version
private Bitmap mMiniBitmap;
@@ -96,6 +102,10 @@ public class ImageWallpaper extends WallpaperService {
private EglHelper mEglHelper;
private final Runnable mFinishRenderingTask = this::finishRendering;
private boolean mNeedRedraw;
private int mWidth = 1;
private int mHeight = 1;
private int mImgWidth = 1;
private int mImgHeight = 1;
GLEngine() {
}
@@ -111,8 +121,13 @@ public class ImageWallpaper extends WallpaperService {
// Deferred init renderer because we need to get wallpaper by display context.
mRenderer = getRendererInstance();
setFixedSizeAllowed(true);
setOffsetNotificationsEnabled(false);
updateSurfaceSize();
Rect window = getDisplayContext()
.getSystemService(WindowManager.class)
.getCurrentWindowMetrics()
.getBounds();
mHeight = window.height();
mWidth = window.width();
mMiniBitmap = null;
if (mWorker != null && mWorker.getThreadHandler() != null) {
mWorker.getThreadHandler().post(this::updateMiniBitmap);
@@ -127,6 +142,41 @@ public class ImageWallpaper extends WallpaperService {
return new ImageWallpaperRenderer(getDisplayContext());
}
@Override
public void onOffsetsChanged(float xOffset, float yOffset,
float xOffsetStep, float yOffsetStep,
int xPixelOffset, int yPixelOffset) {
if (mMiniBitmap == null || mMiniBitmap.isRecycled()) return;
final int pages;
if (xOffsetStep > 0 && xOffsetStep <= 1) {
pages = (int) (1 / xOffsetStep + 1);
} else {
pages = 1;
}
if (pages == mPages) return;
mPages = pages;
updateShift();
mWorker.getThreadHandler().post(() ->
computeAndNotifyLocalColors(new ArrayList<>(mColorAreas), mMiniBitmap));
}
private void updateShift() {
if (mImgHeight == 0) {
mShift = 0;
return;
}
// calculate shift
float imgWidth = (float) mImgWidth / (float) mImgHeight;
float displayWidth =
(float) mWidth / (float) mHeight;
// if need to shift
if (imgWidth > displayWidth) {
mShift = imgWidth / imgWidth - displayWidth / imgWidth;
} else {
mShift = 0;
}
}
private void updateMiniBitmap() {
mRenderer.useBitmap(b -> {
int size = Math.min(b.getWidth(), b.getHeight());
@@ -134,6 +184,8 @@ public class ImageWallpaper extends WallpaperService {
if (size > MIN_SURFACE_WIDTH) {
scale = (float) MIN_SURFACE_WIDTH / (float) size;
}
mImgHeight = b.getHeight();
mImgWidth = b.getWidth();
mMiniBitmap = Bitmap.createScaledBitmap(b, Math.round(scale * b.getWidth()),
Math.round(scale * b.getHeight()), false);
computeAndNotifyLocalColors(mLocalColorsToAdd, mMiniBitmap);
@@ -173,6 +225,9 @@ public class ImageWallpaper extends WallpaperService {
@Override
public void addLocalColorsAreas(@NonNull List<RectF> regions) {
mWorker.getThreadHandler().post(() -> {
if (mColorAreas.size() + mLocalColorsToAdd.size() == 0) {
setOffsetNotificationsEnabled(true);
}
Bitmap bitmap = mMiniBitmap;
if (bitmap == null) {
mLocalColorsToAdd.addAll(regions);
@@ -184,6 +239,7 @@ public class ImageWallpaper extends WallpaperService {
private void computeAndNotifyLocalColors(@NonNull List<RectF> regions, Bitmap b) {
List<WallpaperColors> colors = getLocalWallpaperColors(regions, b);
mColorAreas.addAll(regions);
try {
notifyLocalColorsChanged(regions, colors);
} catch (RuntimeException e) {
@@ -193,14 +249,45 @@ public class ImageWallpaper extends WallpaperService {
@Override
public void removeLocalColorsAreas(@NonNull List<RectF> regions) {
// No-OP
mWorker.getThreadHandler().post(() -> {
mColorAreas.removeAll(regions);
mLocalColorsToAdd.removeAll(regions);
if (mColorAreas.size() + mLocalColorsToAdd.size() == 0) {
setOffsetNotificationsEnabled(false);
}
});
}
private RectF pageToImgRect(RectF area) {
float pageWidth = 1f / (float) mPages;
if (pageWidth < 1 && pageWidth >= 0) pageWidth = 1;
float imgWidth = (float) mImgWidth / (float) mImgHeight;
float displayWidth =
(float) mWidth / (float) mHeight;
float expansion = imgWidth > displayWidth ? displayWidth / imgWidth : 1;
int page = (int) Math.floor(area.centerX() / pageWidth);
float shiftWidth = mShift * page * pageWidth;
RectF imgArea = new RectF();
imgArea.bottom = area.bottom;
imgArea.top = area.top;
imgArea.left = MathUtils.constrain(area.left % pageWidth, 0, 1)
* expansion + shiftWidth;
imgArea.right = MathUtils.constrain(area.right % pageWidth, 0, 1)
* expansion + shiftWidth;
if (imgArea.left > imgArea.right) {
// take full page
imgArea.left = shiftWidth;
imgArea.right = 1 - (mShift - shiftWidth);
}
return imgArea;
}
private List<WallpaperColors> getLocalWallpaperColors(@NonNull List<RectF> areas,
Bitmap b) {
List<WallpaperColors> colors = new ArrayList<>(areas.size());
updateShift();
for (int i = 0; i < areas.size(); i++) {
RectF area = areas.get(i);
RectF area = pageToImgRect(areas.get(i));
if (area == null || !LOCAL_COLOR_BOUNDS.contains(area)) {
colors.add(null);
continue;