diff options
author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
---|---|---|
committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/awt/image/ReplicateScaleFilter.java | |
download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz |
obtained gcc-4.6.4.tar.bz2 from upstream website;upstream
verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.
downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.
if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
Diffstat (limited to 'libjava/classpath/java/awt/image/ReplicateScaleFilter.java')
-rw-r--r-- | libjava/classpath/java/awt/image/ReplicateScaleFilter.java | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/image/ReplicateScaleFilter.java b/libjava/classpath/java/awt/image/ReplicateScaleFilter.java new file mode 100644 index 000000000..94aad85dd --- /dev/null +++ b/libjava/classpath/java/awt/image/ReplicateScaleFilter.java @@ -0,0 +1,257 @@ +/* ReplicateScaleFilter.java -- Java class for filtering images + Copyright (C) 1999 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 java.awt.image; + +import java.util.Hashtable; + +/** + * This filter should be used for fast scaling of images where the result + * does not need to ensure straight lines are still straight, etc. The + * exact method is not defined by Sun but some sort of fast Box filter should + * probably be correct. + * <br> + * Currently this filter does nothing and needs to be implemented. + * + * @author C. Brian Jones (cbj@gnu.org) + */ +public class ReplicateScaleFilter extends ImageFilter +{ + public ReplicateScaleFilter(int width, int height) { + destHeight = height; + destWidth = width; + } + + /** + * The height of the destination image. + */ + protected int destHeight; + + /** + * The width of the destination image. + */ + protected int destWidth; + + /** + * The height of the source image. + */ + protected int srcHeight; + + /** + * The width of the source image. + */ + protected int srcWidth; + + /** + * + */ + protected int srcrows[]; + + /** + * + */ + protected int srccols[]; + + /** + * + */ + protected Object outpixbuf; + + /** + * An <code>ImageProducer</code> indicates the size of the image + * being produced using this method. A filter can override this + * method to intercept these calls from the producer in order to + * change either the width or the height before in turn calling + * the consumer's <code>setDimensions</code> method. + * + * @param width the width of the image + * @param height the height of the image + */ + public void setDimensions(int width, int height) + { + srcWidth = width; + srcHeight = height; + + /* If either destHeight or destWidth is < 0, the image should + maintain its original aspect ratio. When both are < 0, + just maintain the original width and height. */ + if (destWidth < 0 && destHeight < 0) + { + destWidth = width; + destHeight = height; + } + else if (destWidth < 0) + { + destWidth = width * destHeight / srcHeight; + } + else if (destHeight < 0) + { + destHeight = height * destWidth / srcWidth; + } + + if (consumer != null) + consumer.setDimensions(destWidth, destHeight); + } + + /** + * An <code>ImageProducer</code> can set a list of properties + * associated with this image by using this method. + * + * @param props the list of properties associated with this image + */ + public void setProperties(Hashtable<?, ?> props) + { + Hashtable<Object, Object> prop2 = (Hashtable<Object, Object>) props; + prop2.put("filters", "ReplicateScaleFilter"); + if (consumer != null) + consumer.setProperties(prop2); + } + + /** + * This function delivers a rectangle of pixels where any + * pixel(m,n) is stored in the array as a <code>byte</code> at + * index (n * scansize + m + offset). + * + * @param x the x coordinate of the rectangle + * @param y the y coordinate of the rectangle + * @param w the width of the rectangle + * @param h the height of the rectangle + * @param model the <code>ColorModel</code> used to translate the pixels + * @param pixels the array of pixel values + * @param offset the index of the first pixels in the <code>pixels</code> array + * @param scansize the width to use in extracting pixels from the <code>pixels</code> array + */ + public void setPixels(int x, int y, int w, int h, + ColorModel model, byte[] pixels, int offset, int scansize) + { + if (srcrows == null || srccols == null) + setupSources(); + int dx1 = (2 * x * destWidth + srcWidth - 1) / (2 * destWidth); + int dy1 = (2 * y * destHeight + srcHeight - 1) / (2 * destHeight); + byte[] pix; + if (outpixbuf != null && outpixbuf instanceof byte[]) + { + pix = (byte[]) outpixbuf; + } + else + { + pix = new byte[destWidth]; + outpixbuf = pix; + } + int sy, sx; + for (int yy = dy1; (sy = srcrows[yy]) < y + h; yy++) + { + int offs = offset + scansize * (sy - y); + int xx; + for (xx = dx1; (sx = srccols[xx]) < x + w; xx++) + { + pix[xx] = pixels[offs + sx - x]; + } + if (xx > dx1) + { + consumer.setPixels(dx1, yy, xx - dx1, 1, model, pix, dx1, + destWidth); + } + } + } + + /** + * This function delivers a rectangle of pixels where any + * pixel(m,n) is stored in the array as an <code>int</code> at + * index (n * scansize + m + offset). + * + * @param x the x coordinate of the rectangle + * @param y the y coordinate of the rectangle + * @param w the width of the rectangle + * @param h the height of the rectangle + * @param model the <code>ColorModel</code> used to translate the pixels + * @param pixels the array of pixel values + * @param offset the index of the first pixels in the <code>pixels</code> array + * @param scansize the width to use in extracting pixels from the <code>pixels</code> array + */ + public void setPixels(int x, int y, int w, int h, + ColorModel model, int[] pixels, int offset, int scansize) + { + if (srcrows == null || srccols == null) + setupSources(); + int dx1 = (2 * x * destWidth + srcWidth - 1) / (2 * destWidth); + int dy1 = (2 * y * destHeight + srcHeight - 1) / (2 * destHeight); + int[] pix; + if (outpixbuf != null && outpixbuf instanceof int[]) + { + pix = (int[]) outpixbuf; + } + else + { + pix = new int[destWidth]; + outpixbuf = pix; + } + int sy, sx; + for (int yy = dy1; (sy = srcrows[yy]) < y + h; yy++) + { + int offs = offset + scansize * (sy - y); + int xx; + for (xx = dx1; (sx = srccols[xx]) < x + w; xx++) + { + pix[xx] = pixels[offs + sx - x]; + } + if (xx > dx1) + { + consumer.setPixels(dx1, yy, xx - dx1, 1, model, pix, dx1, + destWidth); + } + } + } + + /** + * Sets up the srcrows and srccols arrays. + */ + private void setupSources() + { + srcrows = new int[destHeight + 1]; + for (int y = 0; y <= destHeight; y++) + { + srcrows[y] = (2 * y * srcHeight + srcHeight) / (2 * destHeight); + } + srccols = new int[destWidth + 1]; + for (int x = 0; x <= destWidth; x++) + { + srccols[x] = (2 * x * srcWidth + srcWidth) / (2 * destWidth); + } + } +} |