The Tor Browser: mobile/android/base/gfx/BitmapUtils.java@fc2d59ddac77 (annotated)

mobile/android/base/gfx/BitmapUtils.java@fc2d59ddac77 (annotated)

mobile/android/base/gfx/BitmapUtils.java

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /* -*- 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 / annotate

mobile/android/base/gfx/BitmapUtils.java@fc2d59ddac77 (annotated)

mobile/android/base/gfx/BitmapUtils.java