| /* Copyright (C) 2000 Free Software Foundation |
| |
| This file is part of libgcj. |
| |
| This software is copyrighted work licensed under the terms of the |
| Libgcj License. Please consult the file "LIBGCJ_LICENSE" for |
| details. */ |
| |
| package gnu.gcj.awt; |
| |
| import java.awt.geom.*; |
| import java.awt.image.*; |
| import java.awt.RenderingHints; |
| |
| /** |
| * This raster copy operation assumes that both source and destination |
| * sample models are tightly pixel packed and contain the same number |
| * of bands. |
| * |
| * @throws java.lang.ClassCastException if the sample models of the |
| * rasters are not of type ComponentSampleModel. |
| * |
| * @author Rolf W. Rasmussen <rolfwr@ii.uib.no> |
| */ |
| public class ComponentDataBlitOp implements RasterOp |
| { |
| public static ComponentDataBlitOp INSTANCE = new ComponentDataBlitOp(); |
| |
| public WritableRaster filter(Raster src, WritableRaster dest) |
| { |
| if (dest == null) |
| dest = createCompatibleDestRaster(src); |
| |
| DataBuffer srcDB = src.getDataBuffer(); |
| DataBuffer destDB = dest.getDataBuffer(); |
| |
| ComponentSampleModel srcSM = (ComponentSampleModel) src.getSampleModel(); |
| ComponentSampleModel destSM = (ComponentSampleModel) dest.getSampleModel(); |
| |
| |
| // Calculate offset to data in the underlying arrays: |
| |
| int srcScanlineStride = srcSM.getScanlineStride(); |
| int destScanlineStride = destSM.getScanlineStride(); |
| int srcX = src.getMinX() - src.getSampleModelTranslateX(); |
| int srcY = src.getMinY() - src.getSampleModelTranslateY(); |
| int destX = dest.getMinX() - dest.getSampleModelTranslateX(); |
| int destY = dest.getMinY() - dest.getSampleModelTranslateY(); |
| |
| int numBands = srcSM.getNumBands(); |
| |
| /* We can't use getOffset(x, y) from the sample model since we |
| don't want the band offset added in. */ |
| |
| int srcOffset = |
| numBands*srcX + srcScanlineStride*srcY + // from sample model |
| srcDB.getOffset(); // from data buffer |
| |
| int destOffset = |
| numBands*destX + destScanlineStride*destY + // from sample model |
| destDB.getOffset(); // from data buffer |
| |
| // Determine how much, and how many times to blit. |
| |
| int rowSize = src.getWidth()*numBands; |
| int h = src.getHeight(); |
| |
| if ((rowSize == srcScanlineStride) && |
| (rowSize == destScanlineStride)) |
| { |
| // collapse scan line blits to one large blit. |
| rowSize *= h; |
| h = 1; |
| } |
| |
| |
| // Do blitting |
| |
| Object srcArray = Buffers.getData(srcDB); |
| Object destArray = Buffers.getData(destDB); |
| |
| for (int yd = 0; yd<h; yd++) |
| { |
| System.arraycopy(srcArray, srcOffset, |
| destArray, destOffset, |
| rowSize); |
| srcOffset += srcScanlineStride; |
| destOffset += destScanlineStride; |
| } |
| |
| |
| return dest; |
| } |
| |
| public Rectangle2D getBounds2D(Raster src) |
| { |
| return src.getBounds(); |
| } |
| |
| public WritableRaster createCompatibleDestRaster(Raster src) { |
| |
| /* FIXME: Maybe we should explicitly create a raster with a |
| tightly pixel packed sample model, rather than assuming |
| that the createCompatibleWritableRaster() method in Raster |
| will create one. */ |
| |
| return src.createCompatibleWritableRaster(); |
| } |
| |
| public Point2D getPoint2D(Point2D srcPoint, Point2D destPoint) |
| { |
| if (destPoint == null) |
| return (Point2D) srcPoint.clone(); |
| |
| destPoint.setLocation(srcPoint); |
| return destPoint; |
| } |
| |
| public RenderingHints getRenderingHints() |
| { |
| throw new UnsupportedOperationException("not implemented"); |
| } |
| } |