1 files changed, 524 insertions, 0 deletions
diff --git a/WallpaperPicker/src/com/android/photos/BitmapRegionTileSource.java b/WallpaperPicker/src/com/android/photos/BitmapRegionTileSource.java
new file mode 100644
index 000000000..8511de2da
--- /dev/null
+++ b/WallpaperPicker/src/com/android/photos/BitmapRegionTileSource.java
@@ -0,0 +1,524 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.photos;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Bitmap.Config;
+import android.graphics.BitmapFactory;
+import android.graphics.BitmapRegionDecoder;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.Rect;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Build.VERSION_CODES;
+import android.util.Log;
+
+import com.android.gallery3d.common.BitmapUtils;
+import com.android.gallery3d.common.Utils;
+import com.android.gallery3d.exif.ExifInterface;
+import com.android.gallery3d.glrenderer.BasicTexture;
+import com.android.gallery3d.glrenderer.BitmapTexture;
+import com.android.photos.views.TiledImageRenderer;
+
+import java.io.BufferedInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+interface SimpleBitmapRegionDecoder {
+    int getWidth();
+    int getHeight();
+    Bitmap decodeRegion(Rect wantRegion, BitmapFactory.Options options);
+}
+
+class SimpleBitmapRegionDecoderWrapper implements SimpleBitmapRegionDecoder {
+    BitmapRegionDecoder mDecoder;
+    private SimpleBitmapRegionDecoderWrapper(BitmapRegionDecoder decoder) {
+        mDecoder = decoder;
+    }
+    public static SimpleBitmapRegionDecoderWrapper newInstance(
+            String pathName, boolean isShareable) {
+        try {
+            BitmapRegionDecoder d = BitmapRegionDecoder.newInstance(pathName, isShareable);
+            if (d != null) {
+                return new SimpleBitmapRegionDecoderWrapper(d);
+            }
+        } catch (IOException e) {
+            Log.w("BitmapRegionTileSource", "getting decoder failed for path " + pathName, e);
+            return null;
+        }
+        return null;
+    }
+    public static SimpleBitmapRegionDecoderWrapper newInstance(
+            InputStream is, boolean isShareable) {
+        try {
+            BitmapRegionDecoder d = BitmapRegionDecoder.newInstance(is, isShareable);
+            if (d != null) {
+                return new SimpleBitmapRegionDecoderWrapper(d);
+            }
+        } catch (IOException e) {
+            Log.w("BitmapRegionTileSource", "getting decoder failed", e);
+            return null;
+        }
+        return null;
+    }
+    public int getWidth() {
+        return mDecoder.getWidth();
+    }
+    public int getHeight() {
+        return mDecoder.getHeight();
+    }
+    public Bitmap decodeRegion(Rect wantRegion, BitmapFactory.Options options) {
+        return mDecoder.decodeRegion(wantRegion, options);
+    }
+}
+
+class DumbBitmapRegionDecoder implements SimpleBitmapRegionDecoder {
+    Bitmap mBuffer;
+    Canvas mTempCanvas;
+    Paint mTempPaint;
+    private DumbBitmapRegionDecoder(Bitmap b) {
+        mBuffer = b;
+    }
+    public static DumbBitmapRegionDecoder newInstance(String pathName) {
+        Bitmap b = BitmapFactory.decodeFile(pathName);
+        if (b != null) {
+            return new DumbBitmapRegionDecoder(b);
+        }
+        return null;
+    }
+    public static DumbBitmapRegionDecoder newInstance(InputStream is) {
+        Bitmap b = BitmapFactory.decodeStream(is);
+        if (b != null) {
+            return new DumbBitmapRegionDecoder(b);
+        }
+        return null;
+    }
+    public int getWidth() {
+        return mBuffer.getWidth();
+    }
+    public int getHeight() {
+        return mBuffer.getHeight();
+    }
+    public Bitmap decodeRegion(Rect wantRegion, BitmapFactory.Options options) {
+        if (mTempCanvas == null) {
+            mTempCanvas = new Canvas();
+            mTempPaint = new Paint();
+            mTempPaint.setFilterBitmap(true);
+        }
+        int sampleSize = Math.max(options.inSampleSize, 1);
+        Bitmap newBitmap = Bitmap.createBitmap(
+                wantRegion.width() / sampleSize,
+                wantRegion.height() / sampleSize,
+                Bitmap.Config.ARGB_8888);
+        mTempCanvas.setBitmap(newBitmap);
+        mTempCanvas.save();
+        mTempCanvas.scale(1f / sampleSize, 1f / sampleSize);
+        mTempCanvas.drawBitmap(mBuffer, -wantRegion.left, -wantRegion.top, mTempPaint);
+        mTempCanvas.restore();
+        mTempCanvas.setBitmap(null);
+        return newBitmap;
+    }
+}
+
+/**
+ * A {@link com.android.photos.views.TiledImageRenderer.TileSource} using
+ * {@link BitmapRegionDecoder} to wrap a local file
+ */
+@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)
+public class BitmapRegionTileSource implements TiledImageRenderer.TileSource {
+
+    private static final String TAG = "BitmapRegionTileSource";
+
+    private static final boolean REUSE_BITMAP =
+            Build.VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN;
+    private static final int GL_SIZE_LIMIT = 2048;
+    // This must be no larger than half the size of the GL_SIZE_LIMIT
+    // due to decodePreview being allowed to be up to 2x the size of the target
+    public static final int MAX_PREVIEW_SIZE = GL_SIZE_LIMIT / 2;
+
+    public static abstract class BitmapSource {
+        private SimpleBitmapRegionDecoder mDecoder;
+        private Bitmap mPreview;
+        private int mPreviewSize;
+        private int mRotation;
+        public enum State { NOT_LOADED, LOADED, ERROR_LOADING };
+        private State mState = State.NOT_LOADED;
+        public BitmapSource(int previewSize) {
+            mPreviewSize = previewSize;
+        }
+        public boolean loadInBackground() {
+            ExifInterface ei = new ExifInterface();
+            if (readExif(ei)) {
+                Integer ori = ei.getTagIntValue(ExifInterface.TAG_ORIENTATION);
+                if (ori != null) {
+                    mRotation = ExifInterface.getRotationForOrientationValue(ori.shortValue());
+                }
+            }
+            mDecoder = loadBitmapRegionDecoder();
+            if (mDecoder == null) {
+                mState = State.ERROR_LOADING;
+                return false;
+            } else {
+                int width = mDecoder.getWidth();
+                int height = mDecoder.getHeight();
+                if (mPreviewSize != 0) {
+                    int previewSize = Math.min(mPreviewSize, MAX_PREVIEW_SIZE);
+                    BitmapFactory.Options opts = new BitmapFactory.Options();
+                    opts.inPreferredConfig = Bitmap.Config.ARGB_8888;
+                    opts.inPreferQualityOverSpeed = true;
+
+                    float scale = (float) previewSize / Math.max(width, height);
+                    opts.inSampleSize = BitmapUtils.computeSampleSizeLarger(scale);
+                    opts.inJustDecodeBounds = false;
+                    mPreview = loadPreviewBitmap(opts);
+                }
+                mState = State.LOADED;
+                return true;
+            }
+        }
+
+        public State getLoadingState() {
+            return mState;
+        }
+
+        public SimpleBitmapRegionDecoder getBitmapRegionDecoder() {
+            return mDecoder;
+        }
+
+        public Bitmap getPreviewBitmap() {
+            return mPreview;
+        }
+
+        public int getPreviewSize() {
+            return mPreviewSize;
+        }
+
+        public int getRotation() {
+            return mRotation;
+        }
+
+        public abstract boolean readExif(ExifInterface ei);
+        public abstract SimpleBitmapRegionDecoder loadBitmapRegionDecoder();
+        public abstract Bitmap loadPreviewBitmap(BitmapFactory.Options options);
+    }
+
+    public static class FilePathBitmapSource extends BitmapSource {
+        private String mPath;
+        public FilePathBitmapSource(String path, int previewSize) {
+            super(previewSize);
+            mPath = path;
+        }
+        @Override
+        public SimpleBitmapRegionDecoder loadBitmapRegionDecoder() {
+            SimpleBitmapRegionDecoder d;
+            d = SimpleBitmapRegionDecoderWrapper.newInstance(mPath, true);
+            if (d == null) {
+                d = DumbBitmapRegionDecoder.newInstance(mPath);
+            }
+            return d;
+        }
+        @Override
+        public Bitmap loadPreviewBitmap(BitmapFactory.Options options) {
+            return BitmapFactory.decodeFile(mPath, options);
+        }
+        @Override
+        public boolean readExif(ExifInterface ei) {
+            try {
+                ei.readExif(mPath);
+                return true;
+            } catch (IOException e) {
+                Log.w("BitmapRegionTileSource", "getting decoder failed", e);
+                return false;
+            }
+        }
+    }
+
+    public static class UriBitmapSource extends BitmapSource {
+        private Context mContext;
+        private Uri mUri;
+        public UriBitmapSource(Context context, Uri uri, int previewSize) {
+            super(previewSize);
+            mContext = context;
+            mUri = uri;
+        }
+        private InputStream regenerateInputStream() throws FileNotFoundException {
+            InputStream is = mContext.getContentResolver().openInputStream(mUri);
+            return new BufferedInputStream(is);
+        }
+        @Override
+        public SimpleBitmapRegionDecoder loadBitmapRegionDecoder() {
+            try {
+                InputStream is = regenerateInputStream();
+                SimpleBitmapRegionDecoder regionDecoder =
+                        SimpleBitmapRegionDecoderWrapper.newInstance(is, false);
+                Utils.closeSilently(is);
+                if (regionDecoder == null) {
+                    is = regenerateInputStream();
+                    regionDecoder = DumbBitmapRegionDecoder.newInstance(is);
+                    Utils.closeSilently(is);
+                }
+                return regionDecoder;
+            } catch (FileNotFoundException e) {
+                Log.e("BitmapRegionTileSource", "Failed to load URI " + mUri, e);
+                return null;
+            } catch (IOException e) {
+                Log.e("BitmapRegionTileSource", "Failure while reading URI " + mUri, e);
+                return null;
+            }
+        }
+        @Override
+        public Bitmap loadPreviewBitmap(BitmapFactory.Options options) {
+            try {
+                InputStream is = regenerateInputStream();
+                Bitmap b = BitmapFactory.decodeStream(is, null, options);
+                Utils.closeSilently(is);
+                return b;
+            } catch (FileNotFoundException e) {
+                Log.e("BitmapRegionTileSource", "Failed to load URI " + mUri, e);
+                return null;
+            }
+        }
+        @Override
+        public boolean readExif(ExifInterface ei) {
+            InputStream is = null;
+            try {
+                is = regenerateInputStream();
+                ei.readExif(is);
+                Utils.closeSilently(is);
+                return true;
+            } catch (FileNotFoundException e) {
+                Log.e("BitmapRegionTileSource", "Failed to load URI " + mUri, e);
+                return false;
+            } catch (IOException e) {
+                Log.e("BitmapRegionTileSource", "Failed to load URI " + mUri, e);
+                return false;
+            } finally {
+                Utils.closeSilently(is);
+            }
+        }
+    }
+
+    public static class ResourceBitmapSource extends BitmapSource {
+        private Resources mRes;
+        private int mResId;
+        public ResourceBitmapSource(Resources res, int resId, int previewSize) {
+            super(previewSize);
+            mRes = res;
+            mResId = resId;
+        }
+        private InputStream regenerateInputStream() {
+            InputStream is = mRes.openRawResource(mResId);
+            return new BufferedInputStream(is);
+        }
+        @Override
+        public SimpleBitmapRegionDecoder loadBitmapRegionDecoder() {
+            InputStream is = regenerateInputStream();
+            SimpleBitmapRegionDecoder regionDecoder =
+                    SimpleBitmapRegionDecoderWrapper.newInstance(is, false);
+            Utils.closeSilently(is);
+            if (regionDecoder == null) {
+                is = regenerateInputStream();
+                regionDecoder = DumbBitmapRegionDecoder.newInstance(is);
+                Utils.closeSilently(is);
+            }
+            return regionDecoder;
+        }
+        @Override
+        public Bitmap loadPreviewBitmap(BitmapFactory.Options options) {
+            return BitmapFactory.decodeResource(mRes, mResId, options);
+        }
+        @Override
+        public boolean readExif(ExifInterface ei) {
+            try {
+                InputStream is = regenerateInputStream();
+                ei.readExif(is);
+                Utils.closeSilently(is);
+                return true;
+            } catch (IOException e) {
+                Log.e("BitmapRegionTileSource", "Error reading resource", e);
+                return false;
+            }
+        }
+    }
+
+    SimpleBitmapRegionDecoder mDecoder;
+    int mWidth;
+    int mHeight;
+    int mTileSize;
+    private BasicTexture mPreview;
+    private final int mRotation;
+
+    // For use only by getTile
+    private Rect mWantRegion = new Rect();
+    private Rect mOverlapRegion = new Rect();
+    private BitmapFactory.Options mOptions;
+    private Canvas mCanvas;
+
+    public BitmapRegionTileSource(Context context, BitmapSource source) {
+        mTileSize = TiledImageRenderer.suggestedTileSize(context);
+        mRotation = source.getRotation();
+        mDecoder = source.getBitmapRegionDecoder();
+        if (mDecoder != null) {
+            mWidth = mDecoder.getWidth();
+            mHeight = mDecoder.getHeight();
+            mOptions = new BitmapFactory.Options();
+            mOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;
+            mOptions.inPreferQualityOverSpeed = true;
+            mOptions.inTempStorage = new byte[16 * 1024];
+            int previewSize = source.getPreviewSize();
+            if (previewSize != 0) {
+                previewSize = Math.min(previewSize, MAX_PREVIEW_SIZE);
+                // Although this is the same size as the Bitmap that is likely already
+                // loaded, the lifecycle is different and interactions are on a different
+                // thread. Thus to simplify, this source will decode its own bitmap.
+                Bitmap preview = decodePreview(source, previewSize);
+                if (preview.getWidth() <= GL_SIZE_LIMIT && preview.getHeight() <= GL_SIZE_LIMIT) {
+                    mPreview = new BitmapTexture(preview);
+                } else {
+                    Log.w(TAG, String.format(
+                            "Failed to create preview of apropriate size! "
+                            + " in: %dx%d, out: %dx%d",
+                            mWidth, mHeight,
+                            preview.getWidth(), preview.getHeight()));
+                }
+            }
+        }
+    }
+
+    @Override
+    public int getTileSize() {
+        return mTileSize;
+    }
+
+    @Override
+    public int getImageWidth() {
+        return mWidth;
+    }
+
+    @Override
+    public int getImageHeight() {
+        return mHeight;
+    }
+
+    @Override
+    public BasicTexture getPreview() {
+        return mPreview;
+    }
+
+    @Override
+    public int getRotation() {
+        return mRotation;
+    }
+
+    @Override
+    public Bitmap getTile(int level, int x, int y, Bitmap bitmap) {
+        int tileSize = getTileSize();
+        if (!REUSE_BITMAP) {
+            return getTileWithoutReusingBitmap(level, x, y, tileSize);
+        }
+
+        int t = tileSize << level;
+        mWantRegion.set(x, y, x + t, y + t);
+
+        if (bitmap == null) {
+            bitmap = Bitmap.createBitmap(tileSize, tileSize, Bitmap.Config.ARGB_8888);
+        }
+
+        mOptions.inSampleSize = (1 << level);
+        mOptions.inBitmap = bitmap;
+
+        try {
+            bitmap = mDecoder.decodeRegion(mWantRegion, mOptions);
+        } finally {
+            if (mOptions.inBitmap != bitmap && mOptions.inBitmap != null) {
+                mOptions.inBitmap = null;
+            }
+        }
+
+        if (bitmap == null) {
+            Log.w("BitmapRegionTileSource", "fail in decoding region");
+        }
+        return bitmap;
+    }
+
+    private Bitmap getTileWithoutReusingBitmap(
+            int level, int x, int y, int tileSize) {
+
+        int t = tileSize << level;
+        mWantRegion.set(x, y, x + t, y + t);
+
+        mOverlapRegion.set(0, 0, mWidth, mHeight);
+
+        mOptions.inSampleSize = (1 << level);
+        Bitmap bitmap = mDecoder.decodeRegion(mOverlapRegion, mOptions);
+
+        if (bitmap == null) {
+            Log.w(TAG, "fail in decoding region");
+        }
+
+        if (mWantRegion.equals(mOverlapRegion)) {
+            return bitmap;
+        }
+
+        Bitmap result = Bitmap.createBitmap(tileSize, tileSize, Config.ARGB_8888);
+        if (mCanvas == null) {
+            mCanvas = new Canvas();
+        }
+        mCanvas.setBitmap(result);
+        mCanvas.drawBitmap(bitmap,
+                (mOverlapRegion.left - mWantRegion.left) >> level,
+                (mOverlapRegion.top - mWantRegion.top) >> level, null);
+        mCanvas.setBitmap(null);
+        return result;
+    }
+
+    /**
+     * Note that the returned bitmap may have a long edge that's longer
+     * than the targetSize, but it will always be less than 2x the targetSize
+     */
+    private Bitmap decodePreview(BitmapSource source, int targetSize) {
+        Bitmap result = source.getPreviewBitmap();
+        if (result == null) {
+            return null;
+        }
+
+        // We need to resize down if the decoder does not support inSampleSize
+        // or didn't support the specified inSampleSize (some decoders only do powers of 2)
+        float scale = (float) targetSize / (float) (Math.max(result.getWidth(), result.getHeight()));
+
+        if (scale <= 0.5) {
+            result = BitmapUtils.resizeBitmapByScale(result, scale, true);
+        }
+        return ensureGLCompatibleBitmap(result);
+    }
+
+    private static Bitmap ensureGLCompatibleBitmap(Bitmap bitmap) {
+        if (bitmap == null || bitmap.getConfig() != null) {
+            return bitmap;
+        }
+        Bitmap newBitmap = bitmap.copy(Config.ARGB_8888, false);
+        bitmap.recycle();
+        return newBitmap;
+    }
+}