LayoutLib: Replace custom BitmapFactory by a simpler delegate

Change-Id: Ie61a0a5b4426e64bb71a22d76d05efa4c0865e5e

1 files changed, 117 insertions, 0 deletions

diff --git a/tools/layoutlib/bridge/src/android/graphics/BitmapFactory_Delegate.java b/tools/layoutlib/bridge/src/android/graphics/BitmapFactory_Delegate.java
new file mode 100644
index 0000000..44b14dc
--- /dev/null
+++ b/tools/layoutlib/bridge/src/android/graphics/BitmapFactory_Delegate.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2011 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 android.graphics;
+
+import com.android.layoutlib.bridge.Bridge;
+import com.android.layoutlib.bridge.android.BridgeResources.NinePatchInputStream;
+import com.android.layoutlib.bridge.impl.DelegateManager;
+import com.android.ninepatch.NinePatchChunk;
+import com.android.resources.Density;
+
+import android.graphics.BitmapFactory.Options;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * Delegate implementing the native methods of android.graphics.BitmapFactory
+ *
+ * Through the layoutlib_create tool, the original native methods of BitmapFactory have been
+ * replaced by calls to methods of the same name in this delegate class.
+ *
+ * Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager}
+ * around to map int to instance of the delegate.
+ *
+ */
+/*package*/ class BitmapFactory_Delegate {
+
+    // ------ Native Delegates ------
+
+    /*package*/ static void nativeSetDefaultConfig(int nativeConfig) {
+        // pass
+    }
+
+    /*package*/ static Bitmap nativeDecodeStream(InputStream is, byte[] storage,
+            Rect padding, Options opts) {
+        Bitmap bm = null;
+
+        Density density = Density.MEDIUM;
+        if (opts != null) {
+            density = Density.getEnum(opts.inDensity);
+        }
+
+        try {
+            if (is instanceof NinePatchInputStream) {
+                NinePatchInputStream npis = (NinePatchInputStream) is;
+                npis.disableFakeMarkSupport();
+
+                // load the bitmap as a nine patch
+                com.android.ninepatch.NinePatch ninePatch = com.android.ninepatch.NinePatch.load(
+                        npis, true /*is9Patch*/, false /*convert*/);
+
+                // get the bitmap and chunk objects.
+                bm = Bitmap_Delegate.createBitmap(ninePatch.getImage(), true /*isMutable*/,
+                        density);
+                NinePatchChunk chunk = ninePatch.getChunk();
+
+                // put the chunk in the bitmap
+                bm.setNinePatchChunk(NinePatch_Delegate.serialize(chunk));
+
+                // read the padding
+                int[] paddingarray = chunk.getPadding();
+                padding.left = paddingarray[0];
+                padding.top = paddingarray[1];
+                padding.right = paddingarray[2];
+                padding.bottom = paddingarray[3];
+            } else {
+                // load the bitmap directly.
+                bm = Bitmap_Delegate.createBitmap(is, true, density);
+            }
+        } catch (IOException e) {
+            Bridge.getLog().error(null,"Failed to load image" , e, null);
+        }
+
+        return bm;
+    }
+
+    /*package*/ static Bitmap nativeDecodeFileDescriptor(FileDescriptor fd,
+            Rect padding, Options opts) {
+        opts.inBitmap = null;
+        return null;
+    }
+
+    /*package*/ static Bitmap nativeDecodeAsset(int asset, Rect padding, Options opts) {
+        opts.inBitmap = null;
+        return null;
+    }
+
+    /*package*/ static Bitmap nativeDecodeByteArray(byte[] data, int offset,
+            int length, Options opts) {
+        opts.inBitmap = null;
+        return null;
+    }
+
+    /*package*/ static byte[] nativeScaleNinePatch(byte[] chunk, float scale, Rect pad) {
+        // don't scale for now.
+        return chunk;
+    }
+
+    /*package*/ static boolean nativeIsSeekable(FileDescriptor fd) {
+        return true;
+    }
+}