1 files changed, 137 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java b/src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java
new file mode 100644
index 000000000..bc17a6e03
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/provider/SharedImageProvider.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2012 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.gallery3d.filtershow.provider;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.database.MatrixCursor;
+import android.net.Uri;
+import android.os.ConditionVariable;
+import android.os.ParcelFileDescriptor;
+import android.provider.BaseColumns;
+import android.provider.MediaStore;
+import android.provider.OpenableColumns;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+
+public class SharedImageProvider extends ContentProvider {
+
+    private static final String LOGTAG = "SharedImageProvider";
+
+    public static final String MIME_TYPE = "image/jpeg";
+    public static final String AUTHORITY = "com.android.gallery3d.filtershow.provider.SharedImageProvider";
+    public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/image");
+    public static final String PREPARE = "prepare";
+
+    private final String[] mMimeStreamType = {
+            MIME_TYPE
+    };
+
+    private static ConditionVariable mImageReadyCond = new ConditionVariable(false);
+
+    @Override
+    public int delete(Uri arg0, String arg1, String[] arg2) {
+        return 0;
+    }
+
+    @Override
+    public String getType(Uri arg0) {
+        return MIME_TYPE;
+    }
+
+    @Override
+    public String[] getStreamTypes(Uri arg0, String mimeTypeFilter) {
+        return mMimeStreamType;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        if (values.containsKey(PREPARE)) {
+            if (values.getAsBoolean(PREPARE)) {
+                mImageReadyCond.close();
+            } else {
+                mImageReadyCond.open();
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) {
+        return 0;
+    }
+
+    @Override
+    public boolean onCreate() {
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
+        String uriPath = uri.getLastPathSegment();
+        if (uriPath == null) {
+            return null;
+        }
+        if (projection == null) {
+            projection = new String[] {
+                    BaseColumns._ID,
+                    MediaStore.MediaColumns.DATA,
+                    OpenableColumns.DISPLAY_NAME,
+                    OpenableColumns.SIZE
+            };
+        }
+        // If we receive a query on display name or size,
+        // we should block until the image is ready
+        mImageReadyCond.block();
+
+        File path = new File(uriPath);
+
+        MatrixCursor cursor = new MatrixCursor(projection);
+        Object[] columns = new Object[projection.length];
+        for (int i = 0; i < projection.length; i++) {
+            if (projection[i].equalsIgnoreCase(BaseColumns._ID)) {
+                columns[i] = 0;
+            } else if (projection[i].equalsIgnoreCase(MediaStore.MediaColumns.DATA)) {
+                columns[i] = uri;
+            } else if (projection[i].equalsIgnoreCase(OpenableColumns.DISPLAY_NAME)) {
+                columns[i] = path.getName();
+            } else if (projection[i].equalsIgnoreCase(OpenableColumns.SIZE)) {
+                columns[i] = path.length();
+            }
+        }
+        cursor.addRow(columns);
+
+        return cursor;
+    }
+
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode)
+            throws FileNotFoundException {
+        String uriPath = uri.getLastPathSegment();
+        if (uriPath == null) {
+            return null;
+        }
+        // Here we need to block until the image is ready
+        mImageReadyCond.block();
+        File path = new File(uriPath);
+        int imode = 0;
+        imode |= ParcelFileDescriptor.MODE_READ_ONLY;
+        return ParcelFileDescriptor.open(path, imode);
+    }
+}