| /* |
| * Copyright (c) 1997, 2000, 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 java.awt.image; |
| |
| import java.util.Hashtable; |
| import java.awt.image.ImageConsumer; |
| import java.awt.image.ImageFilter; |
| |
| /** |
| * The <code>BufferedImageFilter</code> class subclasses an |
| * <code>ImageFilter</code> to provide a simple means of |
| * using a single-source/single-destination image operator |
| * ({@link BufferedImageOp}) to filter a <code>BufferedImage</code> |
| * in the Image Producer/Consumer/Observer |
| * paradigm. Examples of these image operators are: {@link ConvolveOp}, |
| * {@link AffineTransformOp} and {@link LookupOp}. |
| * |
| * @see ImageFilter |
| * @see BufferedImage |
| * @see BufferedImageOp |
| */ |
| |
| public class BufferedImageFilter extends ImageFilter implements Cloneable { |
| BufferedImageOp bufferedImageOp; |
| ColorModel model; |
| int width; |
| int height; |
| byte[] bytePixels; |
| int[] intPixels; |
| |
| /** |
| * Constructs a <code>BufferedImageFilter</code> with the |
| * specified single-source/single-destination operator. |
| * @param op the specified <code>BufferedImageOp</code> to |
| * use to filter a <code>BufferedImage</code> |
| * @throws NullPointerException if op is null |
| */ |
| public BufferedImageFilter (BufferedImageOp op) { |
| super(); |
| if (op == null) { |
| throw new NullPointerException("Operation cannot be null"); |
| } |
| bufferedImageOp = op; |
| } |
| |
| /** |
| * Returns the <code>BufferedImageOp</code>. |
| * @return the operator of this <code>BufferedImageFilter</code>. |
| */ |
| public BufferedImageOp getBufferedImageOp() { |
| return bufferedImageOp; |
| } |
| |
| /** |
| * Filters the information provided in the |
| * {@link ImageConsumer#setDimensions(int, int) setDimensions } method |
| * of the {@link ImageConsumer} interface. |
| * <p> |
| * Note: This method is intended to be called by the |
| * {@link ImageProducer} of the <code>Image</code> whose pixels are |
| * being filtered. Developers using this class to retrieve pixels from |
| * an image should avoid calling this method directly since that |
| * operation could result in problems with retrieving the requested |
| * pixels. |
| * <p> |
| * @param width the width to which to set the width of this |
| * <code>BufferedImageFilter</code> |
| * @param height the height to which to set the height of this |
| * <code>BufferedImageFilter</code> |
| * @see ImageConsumer#setDimensions |
| */ |
| public void setDimensions(int width, int height) { |
| if (width <= 0 || height <= 0) { |
| imageComplete(STATICIMAGEDONE); |
| return; |
| } |
| this.width = width; |
| this.height = height; |
| } |
| |
| /** |
| * Filters the information provided in the |
| * {@link ImageConsumer#setColorModel(ColorModel) setColorModel} method |
| * of the <code>ImageConsumer</code> interface. |
| * <p> |
| * If <code>model</code> is <code>null</code>, this |
| * method clears the current <code>ColorModel</code> of this |
| * <code>BufferedImageFilter</code>. |
| * <p> |
| * Note: This method is intended to be called by the |
| * <code>ImageProducer</code> of the <code>Image</code> |
| * whose pixels are being filtered. Developers using this |
| * class to retrieve pixels from an image |
| * should avoid calling this method directly since that |
| * operation could result in problems with retrieving the |
| * requested pixels. |
| * @param model the {@link ColorModel} to which to set the |
| * <code>ColorModel</code> of this <code>BufferedImageFilter</code> |
| * @see ImageConsumer#setColorModel |
| */ |
| public void setColorModel(ColorModel model) { |
| this.model = model; |
| } |
| |
| private void convertToRGB() { |
| int size = width * height; |
| int newpixels[] = new int[size]; |
| if (bytePixels != null) { |
| for (int i = 0; i < size; i++) { |
| newpixels[i] = this.model.getRGB(bytePixels[i] & 0xff); |
| } |
| } else if (intPixels != null) { |
| for (int i = 0; i < size; i++) { |
| newpixels[i] = this.model.getRGB(intPixels[i]); |
| } |
| } |
| bytePixels = null; |
| intPixels = newpixels; |
| this.model = ColorModel.getRGBdefault(); |
| } |
| |
| /** |
| * Filters the information provided in the <code>setPixels</code> |
| * method of the <code>ImageConsumer</code> interface which takes |
| * an array of bytes. |
| * <p> |
| * Note: This method is intended to be called by the |
| * <code>ImageProducer</code> of the <code>Image</code> whose pixels |
| * are being filtered. Developers using |
| * this class to retrieve pixels from an image should avoid calling |
| * this method directly since that operation could result in problems |
| * with retrieving the requested pixels. |
| * @throws IllegalArgumentException if width or height are less than |
| * zero. |
| * @see ImageConsumer#setPixels(int, int, int, int, ColorModel, byte[], |
| int, int) |
| */ |
| public void setPixels(int x, int y, int w, int h, |
| ColorModel model, byte pixels[], int off, |
| int scansize) { |
| // Fix 4184230 |
| if (w < 0 || h < 0) { |
| throw new IllegalArgumentException("Width ("+w+ |
| ") and height ("+h+ |
| ") must be > 0"); |
| } |
| // Nothing to do |
| if (w == 0 || h == 0) { |
| return; |
| } |
| if (y < 0) { |
| int diff = -y; |
| if (diff >= h) { |
| return; |
| } |
| off += scansize * diff; |
| y += diff; |
| h -= diff; |
| } |
| if (y + h > height) { |
| h = height - y; |
| if (h <= 0) { |
| return; |
| } |
| } |
| if (x < 0) { |
| int diff = -x; |
| if (diff >= w) { |
| return; |
| } |
| off += diff; |
| x += diff; |
| w -= diff; |
| } |
| if (x + w > width) { |
| w = width - x; |
| if (w <= 0) { |
| return; |
| } |
| } |
| int dstPtr = y*width + x; |
| if (intPixels == null) { |
| if (bytePixels == null) { |
| bytePixels = new byte[width*height]; |
| this.model = model; |
| } else if (this.model != model) { |
| convertToRGB(); |
| } |
| if (bytePixels != null) { |
| for (int sh = h; sh > 0; sh--) { |
| System.arraycopy(pixels, off, bytePixels, dstPtr, w); |
| off += scansize; |
| dstPtr += width; |
| } |
| } |
| } |
| if (intPixels != null) { |
| int dstRem = width - w; |
| int srcRem = scansize - w; |
| for (int sh = h; sh > 0; sh--) { |
| for (int sw = w; sw > 0; sw--) { |
| intPixels[dstPtr++] = model.getRGB(pixels[off++]&0xff); |
| } |
| off += srcRem; |
| dstPtr += dstRem; |
| } |
| } |
| } |
| /** |
| * Filters the information provided in the <code>setPixels</code> |
| * method of the <code>ImageConsumer</code> interface which takes |
| * an array of integers. |
| * <p> |
| * Note: This method is intended to be called by the |
| * <code>ImageProducer</code> of the <code>Image</code> whose |
| * pixels are being filtered. Developers using this class to |
| * retrieve pixels from an image should avoid calling this method |
| * directly since that operation could result in problems |
| * with retrieving the requested pixels. |
| * @throws IllegalArgumentException if width or height are less than |
| * zero. |
| * @see ImageConsumer#setPixels(int, int, int, int, ColorModel, int[], |
| int, int) |
| */ |
| public void setPixels(int x, int y, int w, int h, |
| ColorModel model, int pixels[], int off, |
| int scansize) { |
| // Fix 4184230 |
| if (w < 0 || h < 0) { |
| throw new IllegalArgumentException("Width ("+w+ |
| ") and height ("+h+ |
| ") must be > 0"); |
| } |
| // Nothing to do |
| if (w == 0 || h == 0) { |
| return; |
| } |
| if (y < 0) { |
| int diff = -y; |
| if (diff >= h) { |
| return; |
| } |
| off += scansize * diff; |
| y += diff; |
| h -= diff; |
| } |
| if (y + h > height) { |
| h = height - y; |
| if (h <= 0) { |
| return; |
| } |
| } |
| if (x < 0) { |
| int diff = -x; |
| if (diff >= w) { |
| return; |
| } |
| off += diff; |
| x += diff; |
| w -= diff; |
| } |
| if (x + w > width) { |
| w = width - x; |
| if (w <= 0) { |
| return; |
| } |
| } |
| |
| if (intPixels == null) { |
| if (bytePixels == null) { |
| intPixels = new int[width * height]; |
| this.model = model; |
| } else { |
| convertToRGB(); |
| } |
| } |
| int dstPtr = y*width + x; |
| if (this.model == model) { |
| for (int sh = h; sh > 0; sh--) { |
| System.arraycopy(pixels, off, intPixels, dstPtr, w); |
| off += scansize; |
| dstPtr += width; |
| } |
| } else { |
| if (this.model != ColorModel.getRGBdefault()) { |
| convertToRGB(); |
| } |
| int dstRem = width - w; |
| int srcRem = scansize - w; |
| for (int sh = h; sh > 0; sh--) { |
| for (int sw = w; sw > 0; sw--) { |
| intPixels[dstPtr++] = model.getRGB(pixels[off++]); |
| } |
| off += srcRem; |
| dstPtr += dstRem; |
| } |
| } |
| } |
| |
| /** |
| * Filters the information provided in the <code>imageComplete</code> |
| * method of the <code>ImageConsumer</code> interface. |
| * <p> |
| * Note: This method is intended to be called by the |
| * <code>ImageProducer</code> of the <code>Image</code> whose pixels |
| * are being filtered. Developers using |
| * this class to retrieve pixels from an image should avoid calling |
| * this method directly since that operation could result in problems |
| * with retrieving the requested pixels. |
| * @param status the status of image loading |
| * @throws ImagingOpException if there was a problem calling the filter |
| * method of the <code>BufferedImageOp</code> associated with this |
| * instance. |
| * @see ImageConsumer#imageComplete |
| */ |
| public void imageComplete(int status) { |
| WritableRaster wr; |
| switch(status) { |
| case IMAGEERROR: |
| case IMAGEABORTED: |
| // reinitialize the params |
| model = null; |
| width = -1; |
| height = -1; |
| intPixels = null; |
| bytePixels = null; |
| break; |
| |
| case SINGLEFRAMEDONE: |
| case STATICIMAGEDONE: |
| if (width <= 0 || height <= 0) break; |
| if (model instanceof DirectColorModel) { |
| if (intPixels == null) break; |
| wr = createDCMraster(); |
| } |
| else if (model instanceof IndexColorModel) { |
| int[] bandOffsets = {0}; |
| if (bytePixels == null) break; |
| DataBufferByte db = new DataBufferByte(bytePixels, |
| width*height); |
| wr = Raster.createInterleavedRaster(db, width, height, width, |
| 1, bandOffsets, null); |
| } |
| else { |
| convertToRGB(); |
| if (intPixels == null) break; |
| wr = createDCMraster(); |
| } |
| BufferedImage bi = new BufferedImage(model, wr, |
| model.isAlphaPremultiplied(), |
| null); |
| bi = bufferedImageOp.filter(bi, null); |
| WritableRaster r = bi.getRaster(); |
| ColorModel cm = bi.getColorModel(); |
| int w = r.getWidth(); |
| int h = r.getHeight(); |
| consumer.setDimensions(w, h); |
| consumer.setColorModel(cm); |
| if (cm instanceof DirectColorModel) { |
| DataBufferInt db = (DataBufferInt) r.getDataBuffer(); |
| consumer.setPixels(0, 0, w, h, |
| cm, db.getData(), 0, w); |
| } |
| else if (cm instanceof IndexColorModel) { |
| DataBufferByte db = (DataBufferByte) r.getDataBuffer(); |
| consumer.setPixels(0, 0, w, h, |
| cm, db.getData(), 0, w); |
| } |
| else { |
| throw new InternalError("Unknown color model "+cm); |
| } |
| break; |
| } |
| consumer.imageComplete(status); |
| } |
| |
| private final WritableRaster createDCMraster() { |
| WritableRaster wr; |
| DirectColorModel dcm = (DirectColorModel) model; |
| boolean hasAlpha = model.hasAlpha(); |
| int[] bandMasks = new int[3+(hasAlpha ? 1 : 0)]; |
| bandMasks[0] = dcm.getRedMask(); |
| bandMasks[1] = dcm.getGreenMask(); |
| bandMasks[2] = dcm.getBlueMask(); |
| if (hasAlpha) { |
| bandMasks[3] = dcm.getAlphaMask(); |
| } |
| DataBufferInt db = new DataBufferInt(intPixels, width*height); |
| wr = Raster.createPackedRaster(db, width, height, width, |
| bandMasks, null); |
| return wr; |
| } |
| |
| } |
