Using BitmapRegionDecoder to only parse partial bitmap during color extraction (1b997d33) · Commits · e / os / android_packages_apps_Trebuchet

src/com/android/launcher3/dynamicui/ColorExtractionService.java

+43 −10

Original line number	Diff line number	Diff line
		@@ -16,24 +16,35 @@

		package com.android.launcher3.dynamicui;

		import android.annotation.TargetApi;
		import android.app.IntentService;
		import android.app.WallpaperManager;
		import android.content.Intent;
		import android.graphics.Bitmap;
		import android.graphics.BitmapRegionDecoder;
		import android.graphics.Rect;
		import android.graphics.drawable.BitmapDrawable;
		import android.os.Build;
		import android.os.Bundle;
		import android.os.ParcelFileDescriptor;
		import android.support.v7.graphics.Palette;
		import android.util.Log;

		import com.android.launcher3.LauncherProvider;
		import com.android.launcher3.LauncherSettings;
		import com.android.launcher3.R;
		import com.android.launcher3.Utilities;
		import com.android.launcher3.config.FeatureFlags;

		import java.io.IOException;

		/**
		* Extracts colors from the wallpaper, and saves results to {@link LauncherProvider}.
		*/
		public class ColorExtractionService extends IntentService {

		private static final String TAG = "ColorExtractionService";

		/** The fraction of the wallpaper to extract colors for use on the hotseat. */
		private static final float HOTSEAT_FRACTION = 1f / 4;

		@@ -45,27 +56,20 @@ public class ColorExtractionService extends IntentService {
		protected void onHandleIntent(Intent intent) {
		WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
		int wallpaperId = ExtractionUtils.getWallpaperId(wallpaperManager);

		ExtractedColors extractedColors = new ExtractedColors();
		if (wallpaperManager.getWallpaperInfo() != null) {
		// We can't extract colors from live wallpapers, so just use the default color always.
		extractedColors.updatePalette(null);
		extractedColors.updateHotseatPalette(null);
		} else {
		Bitmap wallpaper = ((BitmapDrawable) wallpaperManager.getDrawable()).getBitmap();
		Palette palette = Palette.from(wallpaper).generate();
		extractedColors.updatePalette(palette);
		// We extract colors for the hotseat and status bar separately,
		// since they only consider part of the wallpaper.
		Palette hotseatPalette = Palette.from(wallpaper)
		.setRegion(0, (int) (wallpaper.getHeight() * (1f - HOTSEAT_FRACTION)),
		wallpaper.getWidth(), wallpaper.getHeight())
		.clearFilters()
		.generate();
		extractedColors.updateHotseatPalette(hotseatPalette);
		extractedColors.updateHotseatPalette(getHotseatPallete());

		if (FeatureFlags.LIGHT_STATUS_BAR) {
		int statusBarHeight = getResources()
		.getDimensionPixelSize(R.dimen.status_bar_height);
		Bitmap wallpaper = ((BitmapDrawable) wallpaperManager.getDrawable()).getBitmap();
		Palette statusBarPalette = Palette.from(wallpaper)
		.setRegion(0, 0, wallpaper.getWidth(), statusBarHeight)
		.clearFilters()
		@@ -84,4 +88,33 @@ public class ColorExtractionService extends IntentService {
		LauncherSettings.Settings.METHOD_SET_EXTRACTED_COLORS_AND_WALLPAPER_ID,
		null, extras);
		}

		@TargetApi(Build.VERSION_CODES.N)
		private Palette getHotseatPallete() {
		WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
		if (Utilities.ATLEAST_NOUGAT) {
		try (ParcelFileDescriptor fd = wallpaperManager
		.getWallpaperFile(WallpaperManager.FLAG_SYSTEM)) {
		BitmapRegionDecoder decoder = BitmapRegionDecoder
		.newInstance(fd.getFileDescriptor(), false);
		int height = decoder.getHeight();
		Rect decodeRegion = new Rect(0, (int) (height * (1f - HOTSEAT_FRACTION)),
		decoder.getWidth(), height);
		Bitmap bitmap = decoder.decodeRegion(decodeRegion, null);
		decoder.recycle();
		if (bitmap != null) {
		return Palette.from(bitmap).clearFilters().generate();
		}
		} catch (IOException e) {
		Log.e(TAG, "Fetching partial bitmap failed, trying old method", e);
		}
		}

		Bitmap wallpaper = ((BitmapDrawable) wallpaperManager.getDrawable()).getBitmap();
		return Palette.from(wallpaper)
		.setRegion(0, (int) (wallpaper.getHeight() * (1f - HOTSEAT_FRACTION)),
		wallpaper.getWidth(), wallpaper.getHeight())
		.clearFilters()
		.generate();
		}
		}

src/com/android/launcher3/dynamicui/ExtractedColors.java

+0 −28

Original line number	Diff line number	Diff line
		@@ -112,34 +112,6 @@ public class ExtractedColors {
		return defaultColor;
		}

		/**
		* Updates colors based on the palette.
		* If the palette is null, the default color is used in all cases.
		*/
		public void updatePalette(Palette palette) {
		if (palette == null) {
		for (int i = 0; i < NUM_COLOR_PROFILES; i++) {
		setColorAtIndex(i, ExtractedColors.DEFAULT_COLOR);
		}
		} else {
		// We currently don't use any of the colors defined by the Palette API,
		// but this is how we would add them if we ever need them.

		// setColorAtIndex(ExtractedColors.VIBRANT_INDEX,
		// palette.getVibrantColor(ExtractedColors.DEFAULT_COLOR));
		// setColorAtIndex(ExtractedColors.VIBRANT_DARK_INDEX,
		// palette.getDarkVibrantColor(ExtractedColors.DEFAULT_DARK));
		// setColorAtIndex(ExtractedColors.VIBRANT_LIGHT_INDEX,
		// palette.getLightVibrantColor(ExtractedColors.DEFAULT_LIGHT));
		// setColorAtIndex(ExtractedColors.MUTED_INDEX,
		// palette.getMutedColor(DEFAULT_COLOR));
		// setColorAtIndex(ExtractedColors.MUTED_DARK_INDEX,
		// palette.getDarkMutedColor(ExtractedColors.DEFAULT_DARK));
		// setColorAtIndex(ExtractedColors.MUTED_LIGHT_INDEX,
		// palette.getLightVibrantColor(ExtractedColors.DEFAULT_LIGHT));
		}
		}

		/**
		* The hotseat's color is defined as follows:
		* - 12% black for super light wallpaper