4632N/A * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. 4632N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4632N/A * This code is free software; you can redistribute it and/or modify it 4632N/A * under the terms of the GNU General Public License version 2 only, as 4632N/A * published by the Free Software Foundation. Oracle designates this 4632N/A * particular file as subject to the "Classpath" exception as provided 4632N/A * by Oracle in the LICENSE file that accompanied this code. 4632N/A * This code is distributed in the hope that it will be useful, but WITHOUT 4632N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 4632N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 4632N/A * version 2 for more details (a copy is included in the LICENSE file that 4632N/A * You should have received a copy of the GNU General Public License version 4632N/A * 2 along with this work; if not, write to the Free Software Foundation, 4632N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 4632N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 4632N/A// if there is no image created for isdo.imgRef, it creates and image using the isdo.dataProvider 4632N/A// If there is an image present, this is a no-op 4632N/A // parameters specifying this BufferedImage given to us from Java 4632N/A // needed by TYPE_BYTE_INDEXED 4632N/A // Used as a cached image ref created from the isdo.dataprovider. This is only a chached image, and it might become invalid 4632N/A // if somebody draws on the bitmap context, or the pixels are changed in java. In that case, we need to NULL out 4632N/A // this image and recreate it from the data provider. 4632N/A // Cached instance of CGDataProvider. dataProvider is alloced the first time a bitmap context is created, providing the 4632N/A // native pixels as a source of the data. The dataProviders life cycle is the same as ISDO. The reference gets 4632N/A // released when we are done with the ISDO. 4632N/A // Pointer in memory that is used for create the CGBitmapContext and the CGDataProvider (used for imgRef). This is a native 4632N/A // copy of the pixels for the Image. There is a spearate copy of the pixels that lives in Java heap. There are two main 4632N/A // reasons why we keep those pixels spearate: 1) CG doesn't support all the Java pixel formats 2) The Garbage collector can 4632N/A // move the java pixels at any time. There are possible workarounds for both problems. Number 2) seems to be a more serious issue, since 4632N/A // we can solve 1) by only supporting certain image types.