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+/* QtVolatileImage.java --
+ Copyright (C) 2005, 2006 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.qt;
+
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Color;
+import java.awt.Image;
+import java.awt.ImageCapabilities;
+import java.awt.GraphicsConfiguration;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.DirectColorModel;
+import java.awt.image.MemoryImageSource;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+import java.awt.image.VolatileImage;
+import java.util.Hashtable;
+import java.util.WeakHashMap;
+
+/**
+ * QtVolatileImage - wraps a QImage
+ *
+ */
+public class QtVolatileImage extends VolatileImage
+{
+ int width = -1, height = -1;
+
+ /**
+ * Properties.
+ */
+ Hashtable props;
+
+ /**
+ * Pointer to the QImage
+ */
+ long nativeObject;
+
+ /*
+ * The 32-bit AARRGGBB format the uses.
+ */
+ static ColorModel nativeModel = new DirectColorModel(32,
+ 0x00FF0000,
+ 0x0000FF00,
+ 0x000000FF,
+ 0xFF000000);
+
+ /**
+ * Clears the image to RGBA 0
+ */
+ public native void clear();
+
+ /**
+ * Returns a copy of the pixel data as a java array.
+ */
+ private native int[] getPixels();
+
+ /**
+ * Allocates a QImage
+ */
+ private native void createImage();
+
+ /**
+ * HashMap of Graphics objects painting on this Image.
+ */
+ WeakHashMap painters;
+
+ /**
+ * Flags if this image is to be destroyed.
+ */
+ boolean killFlag;
+
+ /**
+ * Frees the above.
+ */
+ private native void freeImage();
+
+ /**
+ * Blit a QImage
+ */
+ public native void blit(QtImage i);
+ public native void blit(QtImage i, int x, int y, int w, int h);
+
+ /**
+ * Sets the image to scaled copy of src image. hints are rendering hints.
+ */
+ private native void createScaledImage(QtVolatileImage src, int hints);
+
+ /**
+ * Draws the image optionally composited.
+ */
+ private native void drawPixels (QtGraphics gc,
+ int bg_red, int bg_green, int bg_blue,
+ int x, int y,
+ boolean composite);
+ /**
+ * Draws the image, optionally scaled and composited.
+ */
+ private native void drawPixelsScaled (QtGraphics gc,
+ int bg_red, int bg_green, int bg_blue,
+ int x, int y, int width, int height,
+ boolean composite);
+
+ /**
+ * Draws the image transformed.
+ */
+ private native void drawPixelsTransformed (QtGraphics gc, QMatrix transform);
+
+ /**
+ * Draws the image scaled flipped and optionally composited.
+ */
+ native void drawPixelsScaledFlipped (QtGraphics gc,
+ int bg_red, int bg_green,
+ int bg_blue,
+ boolean flipX, boolean flipY,
+ int srcX, int srcY,
+ int srcWidth, int srcHeight,
+ int dstX, int dstY,
+ int dstWidth, int dstHeight,
+ boolean composite);
+
+ /**
+ * Constructs an empty QtVolatileImage.
+ */
+ public QtVolatileImage (int width, int height)
+ {
+ this.width = width;
+ this.height = height;
+ props = new Hashtable();
+ createImage();
+ clear();
+ }
+
+ /**
+ * Constructs a scaled version of the src bitmap, using Qt
+ */
+ private QtVolatileImage (QtVolatileImage src, int width, int height,
+ int hints)
+ {
+ this.width = width;
+ this.height = height;
+ props = new Hashtable();
+
+ createScaledImage(src, hints);
+ }
+
+
+ public void finalize()
+ {
+ dispose();
+ }
+
+ public void dispose()
+ {
+ if( painters == null || painters.isEmpty() )
+ freeImage();
+ else
+ killFlag = true; // can't destroy image yet.
+ // Do so when all painters are gone.
+ }
+
+ // java.awt.Image methods ////////////////////////////////////////////////
+
+ public int getWidth (ImageObserver observer)
+ {
+ return getWidth();
+ }
+
+ public int getHeight (ImageObserver observer)
+ {
+ return getHeight();
+ }
+
+ public Object getProperty (String name, ImageObserver observer)
+ {
+ Object value = props.get (name);
+ return (value == null) ? UndefinedProperty : value;
+ }
+
+ /**
+ * Returns the source of this image.
+ */
+ public ImageProducer getSource ()
+ {
+ return new MemoryImageSource(width, height, nativeModel, getPixels(),
+ 0, width);
+ }
+
+ void putPainter(QtImageGraphics g)
+ {
+ if( painters == null )
+ painters = new WeakHashMap();
+ painters.put( g, "dummy" );
+ }
+
+ void removePainter(QtImageGraphics g)
+ {
+ painters.remove( g );
+ if( killFlag && painters.isEmpty() )
+ freeImage();
+ }
+
+ /**
+ * Creates a Graphics context for this image.
+ */
+ public Graphics getGraphics ()
+ {
+ QtImageGraphics g = new QtImageGraphics( this );
+ putPainter( g );
+ return g;
+ }
+
+ /**
+ * Returns a scaled instance of this image.
+ */
+ public Image getScaledInstance(int width,
+ int height,
+ int hints)
+ {
+ if (width <= 0 || height <= 0)
+ throw new IllegalArgumentException("Width and height of scaled bitmap"+
+ "must be >= 0");
+
+ return new QtVolatileImage(this, width, height, hints);
+ }
+
+ /**
+ */
+ public void flush ()
+ {
+ // FIXME ?
+ }
+
+ /**
+ * Returns the image status, used by QtToolkit
+ */
+ public int checkImage (ImageObserver observer)
+ {
+ return ImageObserver.ALLBITS | ImageObserver.WIDTH | ImageObserver.HEIGHT;
+ }
+
+ // Drawing methods ////////////////////////////////////////////////
+
+ /**
+ * Draws an image with eventual scaling/transforming.
+ */
+ public boolean drawImage (QtGraphics g, QMatrix matrix,
+ ImageObserver observer)
+ {
+ drawPixelsTransformed (g, matrix);
+ return true;
+ }
+
+ /**
+ * Draws an image to the QtGraphics context, at (x,y) with optional
+ * compositing with a background color.
+ */
+ public boolean drawImage (QtGraphics g, int x, int y,
+ Color bgcolor, ImageObserver observer)
+ {
+ if(bgcolor != null)
+ drawPixels(g, bgcolor.getRed (), bgcolor.getGreen (),
+ bgcolor.getBlue (), x, y, true);
+ else
+ drawPixels(g, 0, 0, 0, x, y, false);
+
+ return true;
+ }
+
+ /**
+ * Draws an image to the QtGraphics context, at (x,y) scaled to
+ * width and height, with optional compositing with a background color.
+ */
+ public boolean drawImage (QtGraphics g, int x, int y, int width, int height,
+ Color bgcolor, ImageObserver observer)
+ {
+ if(bgcolor != null)
+ drawPixelsScaled(g, bgcolor.getRed (), bgcolor.getGreen (),
+ bgcolor.getBlue (), x, y, width, height, true);
+ else
+ drawPixelsScaled(g, 0, 0, 0, x, y, width, height, false);
+
+ return true;
+ }
+
+ /**
+ * Draws an image with eventual scaling/transforming.
+ */
+ public boolean drawImage (QtGraphics g, int dx1, int dy1, int dx2, int dy2,
+ int sx1, int sy1, int sx2, int sy2,
+ Color bgcolor, ImageObserver observer)
+ {
+ boolean flipX = (dx1 > dx2)^(sx1 > sx2);
+ boolean flipY = (dy1 > dy2)^(sy1 > sy2);
+ int dstWidth = Math.abs (dx2 - dx1);
+ int dstHeight = Math.abs (dy2 - dy1);
+ int srcWidth = Math.abs (sx2 - sx1);
+ int srcHeight = Math.abs (sy2 - sy1);
+ int srcX = (sx1 < sx2) ? sx1 : sx2;
+ int srcY = (sy1 < sy2) ? sy1 : sy2;
+ int dstX = (dx1 < dx2) ? dx1 : dx2;
+ int dstY = (dy1 < dy2) ? dy1 : dy2;
+
+ // Clipping. This requires the dst to be scaled as well,
+ if (srcWidth > width)
+ {
+ dstWidth = (int)((double)dstWidth*((double)width/(double)srcWidth));
+ srcWidth = width - srcX;
+ }
+
+ if (srcHeight > height)
+ {
+ dstHeight = (int)((double)dstHeight*((double)height/(double)srcHeight));
+ srcHeight = height - srcY;
+ }
+
+ if (srcWidth + srcX > width)
+ {
+ dstWidth = (int)((double)dstWidth * (double)(width - srcX)/(double)srcWidth);
+ srcWidth = width - srcX;
+ }
+
+ if (srcHeight + srcY > height)
+ {
+ dstHeight = (int)((double)dstHeight * (double)(width - srcY)/(double)srcHeight);
+ srcHeight = height - srcY;
+ }
+
+ if ( srcWidth <= 0 || srcHeight <= 0 || dstWidth <= 0 || dstHeight <= 0)
+ return true;
+
+ if(bgcolor != null)
+ drawPixelsScaledFlipped (g, bgcolor.getRed (), bgcolor.getGreen (),
+ bgcolor.getBlue (),
+ flipX, flipY,
+ srcX, srcY,
+ srcWidth, srcHeight,
+ dstX, dstY,
+ dstWidth, dstHeight,
+ true);
+ else
+ drawPixelsScaledFlipped (g, 0, 0, 0, flipX, flipY,
+ srcX, srcY, srcWidth, srcHeight,
+ dstX, dstY, dstWidth, dstHeight,
+ false);
+ return true;
+ }
+
+ public native void copyArea(int x, int y, int width, int height,
+ int dx, int dy);
+
+ //******************** VolatileImage stuff ********************
+
+ public boolean contentsLost()
+ {
+ return false;
+ }
+
+ public Graphics2D createGraphics()
+ {
+ QtImageGraphics g = new QtImageGraphics(this);
+ putPainter( g );
+ return g;
+ }
+
+ public ImageCapabilities getCapabilities()
+ {
+ return new ImageCapabilities(false)
+ {
+ public boolean isTrueVolatile()
+ {
+ return false;
+ }
+ };
+ }
+
+ public int getHeight()
+ {
+ return height;
+ }
+
+ public BufferedImage getSnapshot()
+ {
+ BufferedImage bi = new BufferedImage(width, height,
+ BufferedImage.TYPE_INT_ARGB_PRE);
+ bi.setRGB( 0, 0, width, height, getPixels(), 0, width);
+ return bi;
+ }
+
+ public int getWidth()
+ {
+ return width;
+ }
+
+ public int validate(GraphicsConfiguration gc)
+ {
+ return IMAGE_OK;
+ }
+}