| /* BufferedImageGraphics.java |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.awt.peer.gtk; |
| |
| import java.awt.Color; |
| import java.awt.Graphics; |
| import java.awt.GraphicsConfiguration; |
| import java.awt.Image; |
| import java.awt.Rectangle; |
| import java.awt.Shape; |
| import java.awt.font.GlyphVector; |
| import java.awt.geom.AffineTransform; |
| import java.awt.geom.Rectangle2D; |
| import java.awt.image.BufferedImage; |
| import java.awt.image.DataBuffer; |
| import java.awt.image.DataBufferInt; |
| import java.awt.image.ColorModel; |
| import java.awt.image.DirectColorModel; |
| import java.awt.image.RenderedImage; |
| import java.awt.image.ImageObserver; |
| import java.util.WeakHashMap; |
| |
| /** |
| * Implementation of Graphics2D on a Cairo surface. |
| * |
| * Simutanously maintains a CairoSurface and updates the |
| * BufferedImage from that after each drawing operation. |
| */ |
| public class BufferedImageGraphics extends CairoGraphics2D |
| { |
| /** |
| * the buffered Image. |
| */ |
| private BufferedImage image; |
| |
| /** |
| * Image size. |
| */ |
| private int imageWidth, imageHeight; |
| |
| /** |
| * The cairo surface that we actually draw on. |
| */ |
| CairoSurface surface; |
| |
| /** |
| * Cache BufferedImageGraphics surfaces. |
| */ |
| static WeakHashMap bufferedImages = new WeakHashMap(); |
| |
| /** |
| * Its corresponding cairo_t. |
| */ |
| private long cairo_t; |
| |
| /** |
| * Colormodels we recognize for fast copying. |
| */ |
| static ColorModel rgb32 = new DirectColorModel(32, 0xFF0000, 0xFF00, 0xFF); |
| static ColorModel argb32 = new DirectColorModel(32, 0xFF0000, 0xFF00, 0xFF, |
| 0xFF000000); |
| private boolean hasFastCM; |
| private boolean hasAlpha; |
| |
| |
| public BufferedImageGraphics(BufferedImage bi) |
| { |
| this.image = bi; |
| imageWidth = bi.getWidth(); |
| imageHeight = bi.getHeight(); |
| if(bi.getColorModel().equals(rgb32)) |
| { |
| hasFastCM = true; |
| hasAlpha = false; |
| } |
| else if(bi.getColorModel().equals(argb32)) |
| { |
| hasFastCM = true; |
| hasAlpha = false; |
| } |
| else |
| hasFastCM = false; |
| |
| // Cache surfaces. |
| if( bufferedImages.get( bi ) != null ) |
| surface = (CairoSurface)bufferedImages.get( bi ); |
| else |
| { |
| surface = new CairoSurface( imageWidth, imageHeight ); |
| bufferedImages.put(bi, surface); |
| } |
| |
| cairo_t = surface.newCairoContext(); |
| |
| DataBuffer db = bi.getRaster().getDataBuffer(); |
| int[] pixels; |
| // get pixels |
| |
| if(db instanceof CairoSurface) |
| pixels = ((CairoSurface)db).getPixels(imageWidth * imageHeight); |
| else |
| { |
| if( hasFastCM ) |
| { |
| pixels = ((DataBufferInt)db).getData(); |
| if( !hasAlpha ) |
| for(int i = 0; i < pixels.length; i++) |
| pixels[i] &= 0xFFFFFFFF; |
| } |
| else |
| { |
| pixels = CairoGraphics2D.findSimpleIntegerArray |
| (image.getColorModel(),image.getData()); |
| } |
| } |
| surface.setPixels( pixels ); |
| |
| setup( cairo_t ); |
| setClip(0, 0, imageWidth, imageHeight); |
| } |
| |
| BufferedImageGraphics(BufferedImageGraphics copyFrom) |
| { |
| surface = copyFrom.surface; |
| cairo_t = surface.newCairoContext(); |
| imageWidth = copyFrom.imageWidth; |
| imageHeight = copyFrom.imageHeight; |
| copy( copyFrom, cairo_t ); |
| setClip(0, 0, surface.width, surface.height); |
| } |
| |
| /** |
| * Update a rectangle of the bufferedImage. This can be improved upon a lot. |
| */ |
| private void updateBufferedImage(int x, int y, int width, int height) |
| { |
| int[] pixels = surface.getPixels(imageWidth * imageHeight); |
| |
| if( x > imageWidth || y > imageHeight ) |
| return; |
| // Clip edges. |
| if( x < 0 ){ width = width + x; x = 0; } |
| if( y < 0 ){ height = height + y; y = 0; } |
| if( x + width > imageWidth ) |
| width = imageWidth - x; |
| if( y + height > imageHeight ) |
| height = imageHeight - y; |
| |
| if( !hasFastCM ) |
| image.setRGB(x, y, width, height, pixels, |
| x + y * imageWidth, imageWidth); |
| else |
| System.arraycopy(pixels, y * imageWidth, |
| ((DataBufferInt)image.getRaster().getDataBuffer()). |
| getData(), y * imageWidth, height * imageWidth); |
| } |
| |
| /** |
| * Abstract methods. |
| */ |
| public Graphics create() |
| { |
| return new BufferedImageGraphics(this); |
| } |
| |
| public GraphicsConfiguration getDeviceConfiguration() |
| { |
| return null; |
| } |
| |
| protected Rectangle2D getRealBounds() |
| { |
| return new Rectangle2D.Double(0.0, 0.0, imageWidth, imageHeight); |
| } |
| |
| public void copyAreaImpl(int x, int y, int width, int height, int dx, int dy) |
| { |
| surface.copyAreaNative(x, y, width, height, dx, dy, surface.width); |
| updateBufferedImage(x + dx, y + dy, width, height); |
| } |
| |
| /** |
| * Overloaded methods that do actual drawing need to enter the gdk threads |
| * and also do certain things before and after. |
| */ |
| public void draw(Shape s) |
| { |
| super.draw(s); |
| Rectangle r = s.getBounds(); |
| updateBufferedImage(r.x, r.y, r.width, r.height); |
| } |
| |
| public void fill(Shape s) |
| { |
| super.fill(s); |
| Rectangle r = s.getBounds(); |
| updateBufferedImage(r.x, r.y, r.width, r.height); |
| } |
| |
| public void drawRenderedImage(RenderedImage image, AffineTransform xform) |
| { |
| super.drawRenderedImage(image, xform); |
| updateBufferedImage(0, 0, imageWidth, imageHeight); |
| } |
| |
| protected boolean drawImage(Image img, AffineTransform xform, |
| Color bgcolor, ImageObserver obs) |
| { |
| boolean rv = super.drawImage(img, xform, bgcolor, obs); |
| updateBufferedImage(0, 0, imageWidth, imageHeight); |
| return rv; |
| } |
| |
| public void drawGlyphVector(GlyphVector gv, float x, float y) |
| { |
| super.drawGlyphVector(gv, x, y); |
| updateBufferedImage(0, 0, imageWidth, imageHeight); |
| } |
| } |
| |