The Tor Browser: comparison mobile/android/base/gfx/BitmapUtils.java

--1:000000000000
+:413f7d3b406e
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+package org.mozilla.gecko.gfx;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.Field;
+import java.net.MalformedURLException;
+import java.net.URL;
+import org.mozilla.gecko.R;
+import org.mozilla.gecko.util.GeckoJarReader;
+import org.mozilla.gecko.util.ThreadUtils;
+import org.mozilla.gecko.util.UiAsyncTask;
+import org.mozilla.gecko.Tab;
+import org.mozilla.gecko.Tabs;
+import org.mozilla.gecko.ThumbnailHelper;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.text.TextUtils;
+import android.util.Base64;
+import android.util.Log;
+public final class BitmapUtils {
+private static final String LOGTAG = "GeckoBitmapUtils";
+private BitmapUtils() {}
+public interface BitmapLoader {
+public void onBitmapFound(Drawable d);
+}
+private static void runOnBitmapFoundOnUiThread(final BitmapLoader loader, final Drawable d) {
+if (ThreadUtils.isOnUiThread()) {
+loader.onBitmapFound(d);
+return;
+}
+ThreadUtils.postToUiThread(new Runnable() {
+@Override
+public void run() {
+loader.onBitmapFound(d);
+}
+});
+}
+/**
+* Attempts to find a drawable associated with a given string, using its URI scheme to determine
+* how to load the drawable. The BitmapLoader's `onBitmapFound` method is always called, and
+* will be called with `null` if no drawable is found.
+*
+* The BitmapLoader `onBitmapFound` method always runs on the UI thread.
+*/
+public static void getDrawable(final Context context, final String data, final BitmapLoader loader) {
+if (TextUtils.isEmpty(data)) {
+runOnBitmapFoundOnUiThread(loader, null);
+return;
+}
+if (data.startsWith("data")) {
+final BitmapDrawable d = new BitmapDrawable(context.getResources(), getBitmapFromDataURI(data));
+runOnBitmapFoundOnUiThread(loader, d);
+return;
+}
+if (data.startsWith("thumbnail:")) {
+getThumbnailDrawable(context, data, loader);
+return;
+}
+if (data.startsWith("jar:") || data.startsWith("file://")) {
+(new UiAsyncTask<Void, Void, Drawable>(ThreadUtils.getBackgroundHandler()) {
+@Override
+public Drawable doInBackground(Void... params) {
+try {
+if (data.startsWith("jar:jar")) {
+return GeckoJarReader.getBitmapDrawable(context.getResources(), data);
+}
+// Don't attempt to validate the JAR signature when loading an add-on icon
+if (data.startsWith("jar:file")) {
+return GeckoJarReader.getBitmapDrawable(context.getResources(), Uri.decode(data));
+}
+final URL url = new URL(data);
+final InputStream is = (InputStream) url.getContent();
+try {
+return Drawable.createFromStream(is, "src");
+} finally {
+is.close();
+}
+} catch (Exception e) {
+Log.w(LOGTAG, "Unable to set icon", e);
+}
+return null;
+}
+@Override
+public void onPostExecute(Drawable drawable) {
+loader.onBitmapFound(drawable);
+}
+}).execute();
+return;
+}
+if (data.startsWith("-moz-icon://")) {
+final Uri imageUri = Uri.parse(data);
+final String ssp = imageUri.getSchemeSpecificPart();
+final String resource = ssp.substring(ssp.lastIndexOf('/') + 1);
+try {
+final Drawable d = context.getPackageManager().getApplicationIcon(resource);
+runOnBitmapFoundOnUiThread(loader, d);
+} catch(Exception ex) { }
+return;
+}
+if (data.startsWith("drawable://")) {
+final Uri imageUri = Uri.parse(data);
+final int id = getResource(imageUri, R.drawable.ic_status_logo);
+final Drawable d = context.getResources().getDrawable(id);
+runOnBitmapFoundOnUiThread(loader, d);
+return;
+}
+runOnBitmapFoundOnUiThread(loader, null);
+}
+public static void getThumbnailDrawable(final Context context, final String data, final BitmapLoader loader) {
+int id = Integer.parseInt(data.substring(10), 10);
+final Tab tab = Tabs.getInstance().getTab(id);
+runOnBitmapFoundOnUiThread(loader, tab.getThumbnail());
+Tabs.registerOnTabsChangedListener(new Tabs.OnTabsChangedListener() {
+public void onTabChanged(Tab t, Tabs.TabEvents msg, Object data) {
+if (tab == t && msg == Tabs.TabEvents.THUMBNAIL) {
+Tabs.unregisterOnTabsChangedListener(this);
+runOnBitmapFoundOnUiThread(loader, t.getThumbnail());
+}
+}
+});
+ThumbnailHelper.getInstance().getAndProcessThumbnailFor(tab);
+}
+public static Bitmap decodeByteArray(byte[] bytes) {
+return decodeByteArray(bytes, null);
+}
+public static Bitmap decodeByteArray(byte[] bytes, BitmapFactory.Options options) {
+return decodeByteArray(bytes, 0, bytes.length, options);
+}
+public static Bitmap decodeByteArray(byte[] bytes, int offset, int length) {
+return decodeByteArray(bytes, offset, length, null);
+}
+public static Bitmap decodeByteArray(byte[] bytes, int offset, int length, BitmapFactory.Options options) {
+if (bytes.length <= 0) {
+throw new IllegalArgumentException("bytes.length " + bytes.length
++ " must be a positive number");
+}
+Bitmap bitmap = null;
+try {
+bitmap = BitmapFactory.decodeByteArray(bytes, offset, length, options);
+} catch (OutOfMemoryError e) {
+Log.e(LOGTAG, "decodeByteArray(bytes.length=" + bytes.length
++ ", options= " + options + ") OOM!", e);
+return null;
+}
+if (bitmap == null) {
+Log.w(LOGTAG, "decodeByteArray() returning null because BitmapFactory returned null");
+return null;
+}
+if (bitmap.getWidth() <= 0 || bitmap.getHeight() <= 0) {
+Log.w(LOGTAG, "decodeByteArray() returning null because BitmapFactory returned "
++ "a bitmap with dimensions " + bitmap.getWidth()
++ "x" + bitmap.getHeight());
+return null;
+}
+return bitmap;
+}
+public static Bitmap decodeStream(InputStream inputStream) {
+try {
+return BitmapFactory.decodeStream(inputStream);
+} catch (OutOfMemoryError e) {
+Log.e(LOGTAG, "decodeStream() OOM!", e);
+return null;
+}
+}
+public static Bitmap decodeUrl(Uri uri) {
+return decodeUrl(uri.toString());
+}
+public static Bitmap decodeUrl(String urlString) {
+URL url;
+try {
+url = new URL(urlString);
+} catch(MalformedURLException e) {
+Log.w(LOGTAG, "decodeUrl: malformed URL " + urlString);
+return null;
+}
+return decodeUrl(url);
+}
+public static Bitmap decodeUrl(URL url) {
+InputStream stream = null;
+try {
+stream = url.openStream();
+} catch(IOException e) {
+Log.w(LOGTAG, "decodeUrl: IOException downloading " + url);
+return null;
+}
+if (stream == null) {
+Log.w(LOGTAG, "decodeUrl: stream not found downloading " + url);
+return null;
+}
+Bitmap bitmap = decodeStream(stream);
+try {
+stream.close();
+} catch(IOException e) {
+Log.w(LOGTAG, "decodeUrl: IOException closing stream " + url, e);
+}
+return bitmap;
+}
+public static Bitmap decodeResource(Context context, int id) {
+return decodeResource(context, id, null);
+}
+public static Bitmap decodeResource(Context context, int id, BitmapFactory.Options options) {
+Resources resources = context.getResources();
+try {
+return BitmapFactory.decodeResource(resources, id, options);
+} catch (OutOfMemoryError e) {
+Log.e(LOGTAG, "decodeResource() OOM! Resource id=" + id, e);
+return null;
+}
+}
+public static int getDominantColor(Bitmap source) {
+return getDominantColor(source, true);
+}
+public static int getDominantColor(Bitmap source, boolean applyThreshold) {
+if (source == null)
+return Color.argb(255,255,255,255);
+// Keep track of how many times a hue in a given bin appears in the image.
+// Hue values range [0 .. 360), so dividing by 10, we get 36 bins.
+int[] colorBins = new int[36];
+// The bin with the most colors. Initialize to -1 to prevent accidentally
+// thinking the first bin holds the dominant color.
+int maxBin = -1;
+// Keep track of sum hue/saturation/value per hue bin, which we'll use to
+// compute an average to for the dominant color.
+float[] sumHue = new float[36];
+float[] sumSat = new float[36];
+float[] sumVal = new float[36];
+float[] hsv = new float[3];
+int height = source.getHeight();
+int width = source.getWidth();
+int[] pixels = new int[width * height];
+source.getPixels(pixels, 0, width, 0, 0, width, height);
+for (int row = 0; row < height; row++) {
+for (int col = 0; col < width; col++) {
+int c = pixels[col + row * width];
+// Ignore pixels with a certain transparency.
+if (Color.alpha(c) < 128)
+continue;
+Color.colorToHSV(c, hsv);
+// If a threshold is applied, ignore arbitrarily chosen values for "white" and "black".
+if (applyThreshold && (hsv[1] <= 0.35f || hsv[2] <= 0.35f))
+continue;
+// We compute the dominant color by putting colors in bins based on their hue.
+int bin = (int) Math.floor(hsv[0] / 10.0f);
+// Update the sum hue/saturation/value for this bin.
+sumHue[bin] = sumHue[bin] + hsv[0];
+sumSat[bin] = sumSat[bin] + hsv[1];
+sumVal[bin] = sumVal[bin] + hsv[2];
+// Increment the number of colors in this bin.
+colorBins[bin]++;
+// Keep track of the bin that holds the most colors.
+if (maxBin < 0 || colorBins[bin] > colorBins[maxBin])
+maxBin = bin;
+}
+}
+// maxBin may never get updated if the image holds only transparent and/or black/white pixels.
+if (maxBin < 0)
+return Color.argb(255,255,255,255);
+// Return a color with the average hue/saturation/value of the bin with the most colors.
+hsv[0] = sumHue[maxBin]/colorBins[maxBin];
+hsv[1] = sumSat[maxBin]/colorBins[maxBin];
+hsv[2] = sumVal[maxBin]/colorBins[maxBin];
+return Color.HSVToColor(hsv);
+}
+/**
+* Decodes a bitmap from a Base64 data URI.
+*
+* @param dataURI a Base64-encoded data URI string
+* @return        the decoded bitmap, or null if the data URI is invalid
+*/
+public static Bitmap getBitmapFromDataURI(String dataURI) {
+String base64 = dataURI.substring(dataURI.indexOf(',') + 1);
+try {
+byte[] raw = Base64.decode(base64, Base64.DEFAULT);
+return BitmapUtils.decodeByteArray(raw);
+} catch (Exception e) {
+Log.e(LOGTAG, "exception decoding bitmap from data URI: " + dataURI, e);
+}
+return null;
+}
+public static Bitmap getBitmapFromDrawable(Drawable drawable) {
+if (drawable instanceof BitmapDrawable) {
+return ((BitmapDrawable) drawable).getBitmap();
+}
+int width = drawable.getIntrinsicWidth();
+width = width > 0 ? width : 1;
+int height = drawable.getIntrinsicHeight();
+height = height > 0 ? height : 1;
+Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
+Canvas canvas = new Canvas(bitmap);
+drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
+drawable.draw(canvas);
+return bitmap;
+}
+public static int getResource(Uri resourceUrl, int defaultIcon) {
+int icon = defaultIcon;
+final String scheme = resourceUrl.getScheme();
+if ("drawable".equals(scheme)) {
+String resource = resourceUrl.getSchemeSpecificPart();
+resource = resource.substring(resource.lastIndexOf('/') + 1);
+try {
+return Integer.parseInt(resource);
+} catch(NumberFormatException ex) {
+// This isn't a resource id, try looking for a string
+}
+try {
+final Class<R.drawable> drawableClass = R.drawable.class;
+final Field f = drawableClass.getField(resource);
+icon = f.getInt(null);
+} catch (final NoSuchFieldException e1) {
+// just means the resource doesn't exist for fennec. Check in Android resources
+try {
+final Class<android.R.drawable> drawableClass = android.R.drawable.class;
+final Field f = drawableClass.getField(resource);
+icon = f.getInt(null);
+} catch (final NoSuchFieldException e2) {
+// This drawable doesn't seem to exist...
+} catch(Exception e3) {
+Log.i(LOGTAG, "Exception getting drawable", e3);
+}
+} catch (Exception e4) {
+Log.i(LOGTAG, "Exception getting drawable", e4);
+}
+resourceUrl = null;
+}
+return icon;
+}
+}

The Tor Browser / file comparison

comparison: mobile/android/base/gfx/BitmapUtils.java

mobile/android/base/gfx/BitmapUtils.java