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/*
* 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.impl.DelegateManager;
import com.android.ninepatch.NinePatchChunk;
import com.android.resources.Density;
import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
import android.content.res.BridgeResources.NinePatchInputStream;
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 {
// ------ Java delegates ------
@LayoutlibDelegate
/*package*/ static Bitmap finishDecode(Bitmap bm, Rect outPadding, Options opts) {
if (bm == null || opts == null) {
return bm;
}
final int density = opts.inDensity;
if (density == 0) {
return bm;
}
bm.setDensity(density);
final int targetDensity = opts.inTargetDensity;
if (targetDensity == 0 || density == targetDensity || density == opts.inScreenDensity) {
return bm;
}
byte[] np = bm.getNinePatchChunk();
final boolean isNinePatch = np != null && NinePatch.isNinePatchChunk(np);
// DELEGATE CHANGE: never scale 9-patch
if (opts.inScaled && isNinePatch == false) {
float scale = targetDensity / (float)density;
// TODO: This is very inefficient and should be done in native by Skia
final Bitmap oldBitmap = bm;
bm = Bitmap.createScaledBitmap(oldBitmap, (int) (bm.getWidth() * scale + 0.5f),
(int) (bm.getHeight() * scale + 0.5f), true);
oldBitmap.recycle();
if (isNinePatch) {
np = nativeScaleNinePatch(np, scale, outPadding);
bm.setNinePatchChunk(np);
}
bm.setDensity(targetDensity);
}
return bm;
}
// ------ Native Delegates ------
@LayoutlibDelegate
/*package*/ static void nativeSetDefaultConfig(int nativeConfig) {
// pass
}
@LayoutlibDelegate
/*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;
}
@LayoutlibDelegate
/*package*/ static Bitmap nativeDecodeFileDescriptor(FileDescriptor fd,
Rect padding, Options opts) {
opts.inBitmap = null;
return null;
}
@LayoutlibDelegate
/*package*/ static Bitmap nativeDecodeAsset(int asset, Rect padding, Options opts) {
opts.inBitmap = null;
return null;
}
@LayoutlibDelegate
/*package*/ static Bitmap nativeDecodeByteArray(byte[] data, int offset,
int length, Options opts) {
opts.inBitmap = null;
return null;
}
@LayoutlibDelegate
/*package*/ static byte[] nativeScaleNinePatch(byte[] chunk, float scale, Rect pad) {
// don't scale for now. This should not be called anyway since we re-implement
// BitmapFactory.finishDecode();
return chunk;
}
@LayoutlibDelegate
/*package*/ static boolean nativeIsSeekable(FileDescriptor fd) {
return true;
}
}
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