| /* |
| * 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.ide.eclipse.gltrace.state.transforms; |
| |
| import com.android.ide.eclipse.gltrace.GLProtoBuf.GLMessage.Function; |
| import com.android.ide.eclipse.gltrace.state.IGLProperty; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * A {@link BufferSubDataTransform} updates a portion of the buffer data as specified by |
| * the {@link Function#glBufferSubData} function. |
| */ |
| public class BufferSubDataTransform implements IStateTransform { |
| private final IGLPropertyAccessor mAccessor; |
| private final int mOffset; |
| |
| private final byte[] mSubData; |
| private byte[] mOldData; |
| private byte[] mNewData; |
| |
| public BufferSubDataTransform(IGLPropertyAccessor accessor, int offset, byte[] data) { |
| mAccessor = accessor; |
| mOffset = offset; |
| mSubData = data; |
| } |
| |
| @Override |
| public void apply(IGLProperty state) { |
| IGLProperty property = mAccessor.getProperty(state); |
| mOldData = (byte[]) property.getValue(); |
| |
| if (mOldData != null) { |
| mNewData = new byte[mOldData.length]; |
| ByteBuffer bb = ByteBuffer.wrap(mNewData); |
| |
| // copy all of the old buffer |
| bb.put(mOldData); |
| bb.rewind(); |
| |
| // update with the sub buffer data at specified offset |
| bb.position(mOffset); |
| bb.put(mSubData); |
| } |
| |
| property.setValue(mNewData); |
| } |
| |
| @Override |
| public void revert(IGLProperty state) { |
| if (mOldData != null) { |
| IGLProperty property = mAccessor.getProperty(state); |
| property.setValue(mOldData); |
| mOldData = null; |
| } |
| } |
| |
| @Override |
| public IGLProperty getChangedProperty(IGLProperty state) { |
| return mAccessor.getProperty(state); |
| } |
| } |