diff options
Diffstat (limited to 'libjava/classpath/java/awt/image/AffineTransformOp.java')
| -rw-r--r-- | libjava/classpath/java/awt/image/AffineTransformOp.java | 106 |
1 files changed, 53 insertions, 53 deletions
diff --git a/libjava/classpath/java/awt/image/AffineTransformOp.java b/libjava/classpath/java/awt/image/AffineTransformOp.java index df9db7d9636..460804f9012 100644 --- a/libjava/classpath/java/awt/image/AffineTransformOp.java +++ b/libjava/classpath/java/awt/image/AffineTransformOp.java @@ -1,4 +1,4 @@ -/* AffineTransformOp.java -- This class performs affine +/* AffineTransformOp.java -- This class performs affine transformation between two images or rasters in 2 dimensions. Copyright (C) 2004, 2006 Free Software Foundation @@ -51,19 +51,19 @@ import java.util.Arrays; /** * AffineTransformOp performs matrix-based transformations (translations, * scales, flips, rotations, and shears). - * + * * If interpolation is required, nearest neighbour, bilinear, and bicubic * methods are available. * - * @author Olga Rodimina (rodimina@redhat.com) + * @author Olga Rodimina (rodimina@redhat.com) * @author Francis Kung (fkung@redhat.com) */ public class AffineTransformOp implements BufferedImageOp, RasterOp { public static final int TYPE_NEAREST_NEIGHBOR = 1; - + public static final int TYPE_BILINEAR = 2; - + /** * @since 1.5.0 */ @@ -71,13 +71,13 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp private AffineTransform transform; private RenderingHints hints; - + /** * Construct AffineTransformOp with the given xform and interpolationType. * Interpolation type can be TYPE_BILINEAR, TYPE_BICUBIC or * TYPE_NEAREST_NEIGHBOR. * - * @param xform AffineTransform that will applied to the source image + * @param xform AffineTransform that will applied to the source image * @param interpolationType type of interpolation used * @throws ImagingOpException if the transform matrix is noninvertible */ @@ -90,12 +90,12 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp switch (interpolationType) { case TYPE_BILINEAR: - hints = new RenderingHints (RenderingHints.KEY_INTERPOLATION, + hints = new RenderingHints (RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); break; case TYPE_BICUBIC: - hints = new RenderingHints (RenderingHints.KEY_INTERPOLATION, - RenderingHints.VALUE_INTERPOLATION_BICUBIC); + hints = new RenderingHints (RenderingHints.KEY_INTERPOLATION, + RenderingHints.VALUE_INTERPOLATION_BICUBIC); break; default: hints = new RenderingHints (RenderingHints.KEY_INTERPOLATION, @@ -105,7 +105,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp /** * Construct AffineTransformOp with the given xform and rendering hints. - * + * * @param xform AffineTransform that will applied to the source image * @param hints rendering hints that will be used during transformation * @throws ImagingOpException if the transform matrix is noninvertible @@ -119,9 +119,9 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp } /** - * Creates a new BufferedImage with the size equal to that of the - * transformed image and the correct number of bands. The newly created - * image is created with the specified ColorModel. + * Creates a new BufferedImage with the size equal to that of the + * transformed image and the correct number of bands. The newly created + * image is created with the specified ColorModel. * If a ColorModel is not specified, an appropriate ColorModel is used. * * @param src the source image. @@ -149,7 +149,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp } /** - * Creates a new WritableRaster with the size equal to the transformed + * Creates a new WritableRaster with the size equal to the transformed * source raster and correct number of bands . * * @param src the source raster. @@ -159,18 +159,18 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp public WritableRaster createCompatibleDestRaster (Raster src) { Rectangle2D rect = getBounds2D(src); - - if (rect.getWidth() == 0 || rect.getHeight() == 0) + + if (rect.getWidth() == 0 || rect.getHeight() == 0) throw new RasterFormatException("width or height is 0"); - return src.createCompatibleWritableRaster((int) rect.getWidth(), + return src.createCompatibleWritableRaster((int) rect.getWidth(), (int) rect.getHeight()); } /** * Transforms source image using transform specified at the constructor. * The resulting transformed image is stored in the destination image if one - * is provided; otherwise a new BufferedImage is created and returned. + * is provided; otherwise a new BufferedImage is created and returned. * * @param src source image * @param dst destination image @@ -218,7 +218,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp if (src.getNumBands() != dst.getNumBands()) throw new IllegalArgumentException("src and dst must have same number" + " of bands"); - + // Optimization for rasters that can be represented in the RGB colormodel: // wrap the rasters in images, and let Cairo do the transformation if (ColorModel.getRGBdefault().isCompatibleSampleModel(src.getSampleModel()) @@ -232,7 +232,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp src2, false, null); BufferedImage iDst = new BufferedImage(ColorModel.getRGBdefault(), dst, false, null); - + return filter(iSrc, iDst).getRaster(); } @@ -256,7 +256,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp // Use an inverse transform to map each point in the destination to // a point in the source. Note that, while all points in the destination // matrix are integers, this is not necessarily true for points in the - // source (hence why interpolation is required) + // source (hence why interpolation is required) try { AffineTransform inverseTx = transform.createInverse(); @@ -271,18 +271,18 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp // Different interpolation methods... if (hints.containsValue(RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR)) filterNearest(src, dst, dstPts, srcPts); - + else if (hints.containsValue(RenderingHints.VALUE_INTERPOLATION_BILINEAR)) filterBilinear(src, dst, dstPts, srcPts); - + else // bicubic filterBicubic(src, dst, dstPts, srcPts); - return dst; + return dst; } /** - * Transforms source image using transform specified at the constructor and + * Transforms source image using transform specified at the constructor and * returns bounds of the transformed image. * * @param src image to be transformed @@ -292,7 +292,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp { return getBounds2D (src.getRaster()); } - + /** * Returns bounds of the transformed raster. * @@ -313,18 +313,18 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp { if (hints.containsValue(RenderingHints.VALUE_INTERPOLATION_BILINEAR)) return TYPE_BILINEAR; - + else if (hints.containsValue(RenderingHints.VALUE_INTERPOLATION_BICUBIC)) return TYPE_BICUBIC; - - else + + else return TYPE_NEAREST_NEIGHBOR; } - /** - * Returns location of the transformed source point. The resulting point + /** + * Returns location of the transformed source point. The resulting point * is stored in the dstPt if one is specified. - * + * * @param srcPt point to be transformed * @param dstPt destination point * @return the location of the transformed source point. @@ -354,10 +354,10 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp { return transform; } - + /** * Perform nearest-neighbour filtering - * + * * @param src the source raster * @param dst the destination raster * @param dpts array of points on the destination raster @@ -367,14 +367,14 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp double[] pts) { Rectangle srcbounds = src.getBounds(); - + // For all points on the destination raster, copy the value from the // corrosponding (rounded) source point for (int i = 0; i < dpts.length; i += 2) { int srcX = (int) Math.round(pts[i]) + src.getMinX(); int srcY = (int) Math.round(pts[i + 1]) + src.getMinY(); - + if (srcbounds.contains(srcX, srcY)) dst.setDataElements((int) dpts[i] + dst.getMinX(), (int) dpts[i + 1] + dst.getMinY(), @@ -384,7 +384,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp /** * Perform bilinear filtering - * + * * @param src the source raster * @param dst the destination raster * @param dpts array of points on the destination raster @@ -394,26 +394,26 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp double[] pts) { Rectangle srcbounds = src.getBounds(); - + Object xyarr = null; Object xp1arr = null; Object yp1arr = null; Object xyp1arr = null; - + double xy; double xp1; double yp1; double xyp1; double[] result = new double[src.getNumBands()]; - + // For all points in the destination raster, use bilinear interpolation // to find the value from the corrosponding source points for (int i = 0; i < dpts.length; i += 2) { int srcX = (int) Math.round(pts[i]) + src.getMinX(); int srcY = (int) Math.round(pts[i + 1]) + src.getMinY(); - + if (srcbounds.contains(srcX, srcY)) { // Corner case at the bottom or right edge; use nearest neighbour @@ -422,7 +422,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp dst.setDataElements((int) dpts[i] + dst.getMinX(), (int) dpts[i + 1] + dst.getMinY(), src.getDataElements(srcX, srcY, null)); - + // Standard case, apply the bilinear formula else { @@ -448,11 +448,11 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp yp1arr = src.getPixel(x, y+1, (int[])yp1arr); xyp1arr = src.getPixel(x+1, y+1, (int[])xyp1arr); } - // using + // using // array[] pixels = src.getPixels(x, y, 2, 2, pixels); // instead of doing four individual src.getPixel() calls // should be faster, but benchmarking shows that it's not... - + // Run interpolation for each band for (int j = 0; j < src.getNumBands(); j++) { @@ -472,16 +472,16 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp yp1 = ((int[])yp1arr)[j]; xyp1 = ((int[])xyp1arr)[j]; } - - // If all four samples are identical, there's no need to + + // If all four samples are identical, there's no need to // calculate anything if (xy == xp1 && xy == yp1 && xy == xyp1) result[j] = xy; - + // Run bilinear interpolation formula else - result[j] = (xy * (1-xdiff) + xp1 * xdiff) - * (1-ydiff) + result[j] = (xy * (1-xdiff) + xp1 * xdiff) + * (1-ydiff) + (yp1 * (1-xdiff) + xyp1 * xdiff) * ydiff; } @@ -497,7 +497,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp /** * Perform bicubic filtering * based on http://local.wasp.uwa.edu.au/~pbourke/colour/bicubic/ - * + * * @param src the source raster * @param dst the destination raster * @param dpts array of points on the destination raster @@ -522,7 +522,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp double dx = pts[i] + src.getMinX() - x; double dy = pts[i + 1] + src.getMinY() - y; Arrays.fill(result, 0); - + for (int m = - 1; m < 3; m++) for (int n = - 1; n < 3; n++) { @@ -597,7 +597,7 @@ public class AffineTransformOp implements BufferedImageOp, RasterOp result[j] += ((int[])pixels)[j] * r1 * r2; } } - + // Put it all together dst.setPixel((int)dpts[i] + dst.getMinX(), (int)dpts[i+1] + dst.getMinY(), |
