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Diffstat (limited to 'libjava/classpath/gnu/java/awt/peer/gtk/GdkPixbufDecoder.java')
| -rw-r--r-- | libjava/classpath/gnu/java/awt/peer/gtk/GdkPixbufDecoder.java | 681 |
1 files changed, 681 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/peer/gtk/GdkPixbufDecoder.java b/libjava/classpath/gnu/java/awt/peer/gtk/GdkPixbufDecoder.java new file mode 100644 index 00000000000..57d5a36da3a --- /dev/null +++ b/libjava/classpath/gnu/java/awt/peer/gtk/GdkPixbufDecoder.java @@ -0,0 +1,681 @@ +/* GdkPixbufDecoder.java -- Image data decoding object + Copyright (C) 2003, 2004, 2005 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 gnu.classpath.Configuration; + +import java.awt.image.BufferedImage; +import java.awt.image.ColorModel; +import java.awt.image.DirectColorModel; +import java.awt.image.ImageConsumer; +import java.awt.image.ImageProducer; +import java.awt.image.Raster; +import java.awt.image.RenderedImage; +import java.io.DataOutput; +import java.io.IOException; +import java.io.InputStream; +import java.net.URL; +import java.util.ArrayList; +import java.util.Hashtable; +import java.util.Iterator; +import java.util.Locale; +import java.util.Vector; + +import javax.imageio.IIOImage; +import javax.imageio.ImageReadParam; +import javax.imageio.ImageReader; +import javax.imageio.ImageTypeSpecifier; +import javax.imageio.ImageWriteParam; +import javax.imageio.ImageWriter; +import javax.imageio.metadata.IIOMetadata; +import javax.imageio.spi.IIORegistry; +import javax.imageio.spi.ImageReaderSpi; +import javax.imageio.spi.ImageWriterSpi; +import javax.imageio.stream.ImageInputStream; +import javax.imageio.stream.ImageOutputStream; + +public class GdkPixbufDecoder extends gnu.java.awt.image.ImageDecoder +{ + static + { + if (Configuration.INIT_LOAD_LIBRARY) + { + System.loadLibrary("gtkpeer"); + } + initStaticState (); + } + + static native void initStaticState(); + private final int native_state = GtkGenericPeer.getUniqueInteger (); + + // initState() has been called, but pumpDone() has not yet been called. + private boolean needsClose = false; + + // the current set of ImageConsumers for this decoder + Vector curr; + + // interface to GdkPixbuf + native void initState (); + native void pumpBytes (byte[] bytes, int len) throws IOException; + native void pumpDone () throws IOException; + native void finish (boolean needsClose); + static native void streamImage(int[] bytes, String format, int width, int height, boolean hasAlpha, DataOutput sink); + + // gdk-pixbuf provids data in RGBA format + static final ColorModel cm = new DirectColorModel (32, 0xff000000, + 0x00ff0000, + 0x0000ff00, + 0x000000ff); + public GdkPixbufDecoder (InputStream in) + { + super (in); + } + + public GdkPixbufDecoder (String filename) + { + super (filename); + } + + public GdkPixbufDecoder (URL url) + { + super (url); + } + + public GdkPixbufDecoder (byte[] imagedata, int imageoffset, int imagelength) + { + super (imagedata, imageoffset, imagelength); + } + + // called back by native side + void areaPrepared (int width, int height) + { + + if (curr == null) + return; + + for (int i = 0; i < curr.size (); i++) + { + ImageConsumer ic = (ImageConsumer) curr.elementAt (i); + ic.setDimensions (width, height); + ic.setColorModel (cm); + ic.setHints (ImageConsumer.RANDOMPIXELORDER); + } + } + + // called back by native side + void areaUpdated (int x, int y, int width, int height, + int pixels[], int scansize) + { + if (curr == null) + return; + + for (int i = 0; i < curr.size (); i++) + { + ImageConsumer ic = (ImageConsumer) curr.elementAt (i); + ic.setPixels (x, y, width, height, cm, pixels, 0, scansize); + } + } + + // called from an async image loader of one sort or another, this method + // repeatedly reads bytes from the input stream and passes them through a + // GdkPixbufLoader using the native method pumpBytes. pumpBytes in turn + // decodes the image data and calls back areaPrepared and areaUpdated on + // this object, feeding back decoded pixel blocks, which we pass to each + // of the ImageConsumers in the provided Vector. + + public void produce (Vector v, InputStream is) throws IOException + { + curr = v; + + byte bytes[] = new byte[4096]; + int len = 0; + initState(); + needsClose = true; + while ((len = is.read (bytes)) != -1) + pumpBytes (bytes, len); + pumpDone(); + needsClose = false; + + for (int i = 0; i < curr.size (); i++) + { + ImageConsumer ic = (ImageConsumer) curr.elementAt (i); + ic.imageComplete (ImageConsumer.STATICIMAGEDONE); + } + + curr = null; + } + + public void finalize() + { + finish(needsClose); + } + + + public static class ImageFormatSpec + { + public String name; + public boolean writable = false; + public ArrayList mimeTypes = new ArrayList(); + public ArrayList extensions = new ArrayList(); + + public ImageFormatSpec(String name, boolean writable) + { + this.name = name; + this.writable = writable; + } + + public synchronized void addMimeType(String m) + { + mimeTypes.add(m); + } + + public synchronized void addExtension(String e) + { + extensions.add(e); + } + } + + static ArrayList imageFormatSpecs; + + public static ImageFormatSpec registerFormat(String name, boolean writable) + { + ImageFormatSpec ifs = new ImageFormatSpec(name, writable); + synchronized(GdkPixbufDecoder.class) + { + if (imageFormatSpecs == null) + imageFormatSpecs = new ArrayList(); + imageFormatSpecs.add(ifs); + } + return ifs; + } + + static String[] getFormatNames(boolean writable) + { + ArrayList names = new ArrayList(); + synchronized (imageFormatSpecs) + { + Iterator i = imageFormatSpecs.iterator(); + while (i.hasNext()) + { + ImageFormatSpec ifs = (ImageFormatSpec) i.next(); + if (writable && !ifs.writable) + continue; + names.add(ifs.name); + + /* + * In order to make the filtering code work, we need to register + * this type under every "format name" likely to be used as a synonym. + * This generally means "all the extensions people might use". + */ + + Iterator j = ifs.extensions.iterator(); + while (j.hasNext()) + names.add((String) j.next()); + } + } + Object[] objs = names.toArray(); + String[] strings = new String[objs.length]; + for (int i = 0; i < objs.length; ++i) + strings[i] = (String) objs[i]; + return strings; + } + + static String[] getFormatExtensions(boolean writable) + { + ArrayList extensions = new ArrayList(); + synchronized (imageFormatSpecs) + { + Iterator i = imageFormatSpecs.iterator(); + while (i.hasNext()) + { + ImageFormatSpec ifs = (ImageFormatSpec) i.next(); + if (writable && !ifs.writable) + continue; + Iterator j = ifs.extensions.iterator(); + while (j.hasNext()) + extensions.add((String) j.next()); + } + } + Object[] objs = extensions.toArray(); + String[] strings = new String[objs.length]; + for (int i = 0; i < objs.length; ++i) + strings[i] = (String) objs[i]; + return strings; + } + + static String[] getFormatMimeTypes(boolean writable) + { + ArrayList mimeTypes = new ArrayList(); + synchronized (imageFormatSpecs) + { + Iterator i = imageFormatSpecs.iterator(); + while (i.hasNext()) + { + ImageFormatSpec ifs = (ImageFormatSpec) i.next(); + if (writable && !ifs.writable) + continue; + Iterator j = ifs.mimeTypes.iterator(); + while (j.hasNext()) + mimeTypes.add((String) j.next()); + } + } + Object[] objs = mimeTypes.toArray(); + String[] strings = new String[objs.length]; + for (int i = 0; i < objs.length; ++i) + strings[i] = (String) objs[i]; + return strings; + } + + + static String findFormatName(Object ext, boolean needWritable) + { + if (ext == null) + throw new IllegalArgumentException("extension is null"); + + if (!(ext instanceof String)) + throw new IllegalArgumentException("extension is not a string"); + + String str = (String) ext; + + Iterator i = imageFormatSpecs.iterator(); + while (i.hasNext()) + { + ImageFormatSpec ifs = (ImageFormatSpec) i.next(); + + if (needWritable && !ifs.writable) + continue; + + if (ifs.name.equals(str)) + return str; + + Iterator j = ifs.extensions.iterator(); + while (j.hasNext()) + { + String extension = (String)j.next(); + if (extension.equals(str)) + return ifs.name; + } + + j = ifs.mimeTypes.iterator(); + while (j.hasNext()) + { + String mimeType = (String)j.next(); + if (mimeType.equals(str)) + return ifs.name; + } + } + throw new IllegalArgumentException("unknown extension '" + str + "'"); + } + + private static GdkPixbufReaderSpi readerSpi; + private static GdkPixbufWriterSpi writerSpi; + + public static synchronized GdkPixbufReaderSpi getReaderSpi() + { + if (readerSpi == null) + readerSpi = new GdkPixbufReaderSpi(); + return readerSpi; + } + + public static synchronized GdkPixbufWriterSpi getWriterSpi() + { + if (writerSpi == null) + writerSpi = new GdkPixbufWriterSpi(); + return writerSpi; + } + + public static void registerSpis(IIORegistry reg) + { + reg.registerServiceProvider(getReaderSpi(), ImageReaderSpi.class); + reg.registerServiceProvider(getWriterSpi(), ImageWriterSpi.class); + } + + public static class GdkPixbufWriterSpi extends ImageWriterSpi + { + public GdkPixbufWriterSpi() + { + super("GdkPixbuf", "2.x", + GdkPixbufDecoder.getFormatNames(true), + GdkPixbufDecoder.getFormatExtensions(true), + GdkPixbufDecoder.getFormatMimeTypes(true), + "gnu.java.awt.peer.gtk.GdkPixbufDecoder$GdkPixbufWriter", + new Class[] { ImageOutputStream.class }, + new String[] { "gnu.java.awt.peer.gtk.GdkPixbufDecoder$GdkPixbufReaderSpi" }, + false, null, null, null, null, + false, null, null, null, null); + } + + public boolean canEncodeImage(ImageTypeSpecifier ts) + { + return true; + } + + public ImageWriter createWriterInstance(Object ext) + { + return new GdkPixbufWriter(this, ext); + } + + public String getDescription(java.util.Locale loc) + { + return "GdkPixbuf Writer SPI"; + } + + } + + public static class GdkPixbufReaderSpi extends ImageReaderSpi + { + public GdkPixbufReaderSpi() + { + super("GdkPixbuf", "2.x", + GdkPixbufDecoder.getFormatNames(false), + GdkPixbufDecoder.getFormatExtensions(false), + GdkPixbufDecoder.getFormatMimeTypes(false), + "gnu.java.awt.peer.gtk.GdkPixbufDecoder$GdkPixbufReader", + new Class[] { ImageInputStream.class }, + new String[] { "gnu.java.awt.peer.gtk.GdkPixbufDecoder$GdkPixbufWriterSpi" }, + false, null, null, null, null, + false, null, null, null, null); + } + + public boolean canDecodeInput(Object obj) + { + return true; + } + + public ImageReader createReaderInstance(Object ext) + { + return new GdkPixbufReader(this, ext); + } + + public String getDescription(Locale loc) + { + return "GdkPixbuf Reader SPI"; + } + } + + private static class GdkPixbufWriter + extends ImageWriter + { + String ext; + public GdkPixbufWriter(GdkPixbufWriterSpi ownerSpi, Object ext) + { + super(ownerSpi); + this.ext = findFormatName(ext, true); + } + + public IIOMetadata convertImageMetadata (IIOMetadata inData, + ImageTypeSpecifier imageType, + ImageWriteParam param) + { + return null; + } + + public IIOMetadata convertStreamMetadata (IIOMetadata inData, + ImageWriteParam param) + { + return null; + } + + public IIOMetadata getDefaultImageMetadata (ImageTypeSpecifier imageType, + ImageWriteParam param) + { + return null; + } + + public IIOMetadata getDefaultStreamMetadata (ImageWriteParam param) + { + return null; + } + + public void write (IIOMetadata streamMetadata, IIOImage i, ImageWriteParam param) + throws IOException + { + RenderedImage image = i.getRenderedImage(); + Raster ras = image.getData(); + int width = ras.getWidth(); + int height = ras.getHeight(); + ColorModel model = image.getColorModel(); + int[] pixels = GdkGraphics2D.findSimpleIntegerArray (image.getColorModel(), ras); + + if (pixels == null) + { + BufferedImage img = new BufferedImage(width, height, + (model != null && model.hasAlpha() ? + BufferedImage.TYPE_INT_ARGB + : BufferedImage.TYPE_INT_RGB)); + int[] pix = new int[4]; + for (int y = 0; y < height; ++y) + for (int x = 0; x < width; ++x) + img.setRGB(x, y, model.getRGB(ras.getPixel(x, y, pix))); + pixels = GdkGraphics2D.findSimpleIntegerArray (img.getColorModel(), + img.getRaster()); + model = img.getColorModel(); + } + + processImageStarted(1); + streamImage(pixels, this.ext, width, height, model.hasAlpha(), + (DataOutput) this.getOutput()); + processImageComplete(); + } + } + + private static class GdkPixbufReader + extends ImageReader + implements ImageConsumer + { + // ImageConsumer parts + GdkPixbufDecoder dec; + BufferedImage bufferedImage; + ColorModel defaultModel; + int width; + int height; + String ext; + + public GdkPixbufReader(GdkPixbufReaderSpi ownerSpi, Object ext) + { + super(ownerSpi); + this.ext = findFormatName(ext, false); + } + + public GdkPixbufReader(GdkPixbufReaderSpi ownerSpi, Object ext, GdkPixbufDecoder d) + { + this(ownerSpi, ext); + dec = d; + } + + public void setDimensions(int w, int h) + { + processImageStarted(1); + width = w; + height = h; + } + + public void setProperties(Hashtable props) {} + + public void setColorModel(ColorModel model) + { + defaultModel = model; + } + + public void setHints(int flags) {} + + public void setPixels(int x, int y, int w, int h, + ColorModel model, byte[] pixels, + int offset, int scansize) + { + } + + public void setPixels(int x, int y, int w, int h, + ColorModel model, int[] pixels, + int offset, int scansize) + { + if (model == null) + model = defaultModel; + + if (bufferedImage == null) + { + bufferedImage = new BufferedImage (width, height, (model != null && model.hasAlpha() ? + BufferedImage.TYPE_INT_ARGB + : BufferedImage.TYPE_INT_RGB)); + } + + int pixels2[]; + if (model != null) + { + pixels2 = new int[pixels.length]; + for (int yy = 0; yy < h; yy++) + for (int xx = 0; xx < w; xx++) + { + int i = yy * scansize + xx; + pixels2[i] = model.getRGB (pixels[i]); + } + } + else + pixels2 = pixels; + + bufferedImage.setRGB (x, y, w, h, pixels2, offset, scansize); + processImageProgress(y / (height == 0 ? 1 : height)); + } + + public void imageComplete(int status) + { + processImageComplete(); + } + + public BufferedImage getBufferedImage() + { + if (bufferedImage == null && dec != null) + dec.startProduction (this); + return bufferedImage; + } + + // ImageReader parts + + public int getNumImages(boolean allowSearch) + throws IOException + { + return 1; + } + + public IIOMetadata getImageMetadata(int i) + { + return null; + } + + public IIOMetadata getStreamMetadata() + throws IOException + { + return null; + } + + public Iterator getImageTypes(int imageIndex) + throws IOException + { + BufferedImage img = getBufferedImage(); + Vector vec = new Vector(); + vec.add(new ImageTypeSpecifier(img)); + return vec.iterator(); + } + + public int getHeight(int imageIndex) + throws IOException + { + return getBufferedImage().getHeight(); + } + + public int getWidth(int imageIndex) + throws IOException + { + return getBufferedImage().getWidth(); + } + + public void setInput(Object input, + boolean seekForwardOnly, + boolean ignoreMetadata) + { + super.setInput(input, seekForwardOnly, ignoreMetadata); + dec = new GdkPixbufDecoder((InputStream) getInput()); + } + + public BufferedImage read(int imageIndex, ImageReadParam param) + throws IOException + { + return getBufferedImage (); + } + } + + // remaining helper class and static method is a convenience for the Gtk + // peers, for loading a BufferedImage in off a disk file without going + // through the whole imageio system. + + public static BufferedImage createBufferedImage (String filename) + { + GdkPixbufReader r = new GdkPixbufReader (getReaderSpi(), + "png", // reader auto-detects, doesn't matter + new GdkPixbufDecoder (filename)); + return r.getBufferedImage (); + } + + public static BufferedImage createBufferedImage (URL u) + { + GdkPixbufReader r = new GdkPixbufReader (getReaderSpi(), + "png", // reader auto-detects, doesn't matter + new GdkPixbufDecoder (u)); + return r.getBufferedImage (); + } + + public static BufferedImage createBufferedImage (byte[] imagedata, int imageoffset, + int imagelength) + { + GdkPixbufReader r = new GdkPixbufReader (getReaderSpi(), + "png", // reader auto-detects, doesn't matter + new GdkPixbufDecoder (imagedata, + imageoffset, + imagelength)); + return r.getBufferedImage (); + } + + public static BufferedImage createBufferedImage (ImageProducer producer) + { + GdkPixbufReader r = new GdkPixbufReader (getReaderSpi(), "png" /* ignored */, null); + producer.startProduction(r); + return r.getBufferedImage (); + } + +} |