| /* |
| * Copyright (c) 1996, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt.image; |
| |
| import java.awt.Component; |
| import java.awt.Color; |
| import java.awt.SystemColor; |
| import java.awt.Font; |
| import java.awt.Graphics; |
| import java.awt.Graphics2D; |
| import java.awt.GraphicsEnvironment; |
| import java.awt.image.BufferedImage; |
| import java.awt.image.ImageProducer; |
| import java.awt.image.ColorModel; |
| import java.awt.image.WritableRaster; |
| import sun.java2d.SunGraphics2D; |
| import sun.java2d.SurfaceData; |
| |
| /** |
| * This is a special variant of BufferedImage that keeps a reference to |
| * a Component. The Component's foreground and background colors and |
| * default font are used as the defaults for this image. |
| */ |
| public class OffScreenImage extends BufferedImage { |
| |
| protected Component c; |
| private OffScreenImageSource osis; |
| private Font defaultFont; |
| |
| /** |
| * Constructs an OffScreenImage given a color model and tile, |
| * for offscreen rendering to be used with a given component. |
| * The component is used to obtain the foreground color, background |
| * color and font. |
| */ |
| public OffScreenImage(Component c, ColorModel cm, WritableRaster raster, |
| boolean isRasterPremultiplied) |
| { |
| super(cm, raster, isRasterPremultiplied, null); |
| this.c = c; |
| initSurface(raster.getWidth(), raster.getHeight()); |
| } |
| |
| public Graphics getGraphics() { |
| return createGraphics(); |
| } |
| |
| public Graphics2D createGraphics() { |
| if (c == null) { |
| GraphicsEnvironment env = |
| GraphicsEnvironment.getLocalGraphicsEnvironment(); |
| return env.createGraphics(this); |
| } |
| |
| Color bg = c.getBackground(); |
| if (bg == null) { |
| bg = SystemColor.window; |
| } |
| |
| Color fg = c.getForeground(); |
| if (fg == null) { |
| fg = SystemColor.windowText; |
| } |
| |
| Font font = c.getFont(); |
| if (font == null) { |
| if (defaultFont == null) { |
| defaultFont = new Font("Dialog", Font.PLAIN, 12); |
| } |
| font = defaultFont; |
| } |
| |
| return new SunGraphics2D(SurfaceData.getPrimarySurfaceData(this), |
| fg, bg, font); |
| } |
| |
| private void initSurface(int width, int height) { |
| Graphics2D g2 = createGraphics(); |
| try { |
| g2.clearRect(0, 0, width, height); |
| } finally { |
| g2.dispose(); |
| } |
| } |
| |
| public ImageProducer getSource() { |
| if (osis == null) { |
| osis = new OffScreenImageSource(this); |
| } |
| return osis; |
| } |
| } |