mirror of
https://github.com/openjdk/jdk.git
synced 2026-04-25 06:10:44 +00:00
116 lines
3.7 KiB
Java
116 lines
3.7 KiB
Java
/*
|
|
* 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;
|
|
}
|
|
}
|