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/* GtkImage.java |
/* GtkImage.java |
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Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc. |
Copyright (C) 2005 Free Software Foundation, Inc. |
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This file is part of GNU Classpath. |
This file is part of GNU Classpath. |
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package gnu.java.awt.peer.gtk; |
package gnu.java.awt.peer.gtk; |
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import java.awt.Graphics; |
import java.awt.Graphics; |
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import java.awt.Color; |
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import java.awt.Image; |
import java.awt.Image; |
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import java.awt.image.ColorModel; |
import java.awt.image.ColorModel; |
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import java.awt.image.DirectColorModel; |
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import java.awt.image.MemoryImageSource; |
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import java.awt.image.ImageConsumer; |
import java.awt.image.ImageConsumer; |
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import java.awt.image.ImageObserver; |
import java.awt.image.ImageObserver; |
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import java.awt.image.ImageProducer; |
import java.awt.image.ImageProducer; |
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import java.io.File; |
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import java.io.IOException; |
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import java.util.Hashtable; |
import java.util.Hashtable; |
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import java.util.Vector; |
import java.util.Vector; |
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import gnu.classpath.RawData; |
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public class GtkImage extends Image implements ImageConsumer |
/** |
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* GtkImage - wraps a GdkPixbuf or GdkPixmap. |
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* |
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* The constructor GtkImage(int, int) creates an 'off-screen' GdkPixmap, |
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* this can be drawn to (it's a GdkDrawable), and correspondingly, you can |
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* create a GdkGraphics object for it. |
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* |
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* This corresponds to the Image implementation returned by |
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* Component.createImage(int, int). |
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* |
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* A GdkPixbuf is 'on-screen' and the gdk cannot draw to it, |
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* this is used for the other constructors (and other createImage methods), and |
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* corresponds to the Image implementations returned by the Toolkit.createImage |
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* methods, and is basically immutable. |
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* |
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* @author Sven de Marothy |
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*/ |
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public class GtkImage extends Image |
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{ |
{ |
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int width = -1, height = -1; |
int width = -1, height = -1; |
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Hashtable props = null; |
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boolean isLoaded = false; |
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boolean isCacheable = true; |
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boolean loading = false; |
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Vector widthObservers = new Vector (); |
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Vector heightObservers = new Vector (); |
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Vector propertyObservers = new Vector (); |
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/** |
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* Properties. |
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*/ |
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Hashtable props; |
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/** |
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* Loaded or not flag, for asynchronous compatibility. |
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*/ |
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boolean isLoaded; |
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/** |
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* Pointer to the GdkPixbuf |
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*/ |
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RawData pixmap; |
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/** |
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* Observer queue. |
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*/ |
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Vector observers; |
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/** |
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* If offScreen is set, a GdkBitmap is wrapped and not a Pixbuf. |
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*/ |
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boolean offScreen; |
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/** |
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* Original source, if created from an ImageProducer. |
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*/ |
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ImageProducer source; |
ImageProducer source; |
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ImageObserver observer; |
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Graphics g; |
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/* Variables in which we stored cached data, if possible. |
/* |
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* The 32-bit AABBGGRR format the GDK uses. |
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An image is cached if the following properties are true: |
*/ |
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1. The ColorModel passed into setColorModel is the same ColorModel |
static ColorModel nativeModel = new DirectColorModel(32, |
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passed to all invocations of setPixels. |
0x000000FF, |
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2. The image contains a single frame. |
0x0000FF00, |
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0x00FF0000, |
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*/ |
0xFF000000); |
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int[] pixelCache; |
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ColorModel model; |
/** |
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* Returns a copy of the pixel data as a java array. |
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public |
*/ |
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GtkImage (ImageProducer producer, Graphics g) |
private native int[] getPixels(); |
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/** |
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* Sets the pixel data from a java array. |
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*/ |
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private native void setPixels(int[] pixels); |
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/** |
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* Loads an image using gdk-pixbuf. |
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*/ |
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private native boolean loadPixbuf(String name); |
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/** |
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* Allocates a Gtk Pixbuf or pixmap |
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*/ |
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private native void createPixmap(); |
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/** |
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* Frees the above. |
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*/ |
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private native void freePixmap(); |
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/** |
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* Sets the pixmap to scaled copy of src image. hints are rendering hints. |
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*/ |
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private native void createScaledPixmap(GtkImage src, int hints); |
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/** |
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* Draws the image, optionally scaled and composited. |
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*/ |
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private native void drawPixelsScaled (GdkGraphics gc, |
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int bg_red, int bg_green, int bg_blue, |
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int x, int y, int width, int height, |
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boolean composite); |
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/** |
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* Draws the image, optionally scaled flipped and composited. |
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*/ |
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private native void drawPixelsScaledFlipped (GdkGraphics gc, |
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int bg_red, int bg_green, |
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int bg_blue, |
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boolean flipX, boolean flipY, |
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int srcX, int srcY, |
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int srcWidth, int srcHeight, |
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int dstX, int dstY, |
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int dstWidth, int dstHeight, |
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boolean composite); |
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/** |
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* Constructs a GtkImage from an ImageProducer. Asynchronity is handled in |
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* the following manner: |
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* A GtkImageConsumer gets the image data, and calls setImage() when |
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* completely finished. The GtkImage is not considered loaded until the |
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* GtkImageConsumer is completely finished. We go for all "all or nothing". |
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*/ |
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public GtkImage (ImageProducer producer) |
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{ |
{ |
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isLoaded = false; |
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observers = new Vector(); |
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source = producer; |
source = producer; |
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this.g = g; |
source.startProduction(new GtkImageConsumer(this, source)); |
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offScreen = false; |
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} |
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if (source != null) |
/** |
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source.addConsumer (this); |
* Constructs a GtkImage by loading a given file. |
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* |
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* @throws IllegalArgumentException if the image could not be loaded. |
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*/ |
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public GtkImage (String filename) |
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{ |
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File f = new File(filename); |
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try |
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{ |
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if (loadPixbuf(f.getCanonicalPath()) != true) |
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throw new IllegalArgumentException("Couldn't load image: "+filename); |
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} |
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catch(IOException e) |
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{ |
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throw new IllegalArgumentException("Couldn't load image: "+filename); |
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} |
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isLoaded = true; |
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observers = null; |
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offScreen = false; |
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props = new Hashtable(); |
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} |
} |
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public void setObserver (ImageObserver observer) |
/** |
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* Constructs an empty GtkImage. |
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*/ |
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public GtkImage (int width, int height) |
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{ |
{ |
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this.observer = observer; |
this.width = width; |
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this.height = height; |
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props = new Hashtable(); |
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isLoaded = true; |
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observers = null; |
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offScreen = true; |
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createPixmap(); |
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} |
} |
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public synchronized int[] |
/** |
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getPixelCache () |
* Constructs a scaled version of the src bitmap, using the GDK. |
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*/ |
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private GtkImage (GtkImage src, int width, int height, int hints) |
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{ |
{ |
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return pixelCache; |
this.width = width; |
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this.height = height; |
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props = new Hashtable(); |
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isLoaded = true; |
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observers = null; |
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offScreen = false; |
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// Use the GDK scaling method. |
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createScaledPixmap(src, hints); |
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} |
} |
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public synchronized ColorModel |
/** |
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getColorModel () |
* Callback from the image consumer. |
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*/ |
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public void setImage(int width, int height, |
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int[] pixels, Hashtable properties) |
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{ |
{ |
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return model; |
this.width = width; |
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this.height = height; |
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props = (properties != null) ? properties : new Hashtable(); |
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isLoaded = true; |
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deliver(); |
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createPixmap(); |
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setPixels(pixels); |
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} |
} |
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public synchronized int |
// java.awt.Image methods //////////////////////////////////////////////// |
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getWidth (ImageObserver observer) |
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public synchronized int getWidth (ImageObserver observer) |
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{ |
{ |
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if (width == -1) |
if (addObserver(observer)) |
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widthObservers.addElement (observer); |
return -1; |
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return width; |
return width; |
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} |
} |
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public synchronized int |
public synchronized int getHeight (ImageObserver observer) |
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getHeight (ImageObserver observer) |
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{ |
{ |
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if (height == -1) |
if (addObserver(observer)) |
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heightObservers.addElement (observer); |
return -1; |
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return height; |
return height; |
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} |
} |
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public ImageProducer |
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getSource () |
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{ |
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return source; |
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} |
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public Graphics |
public synchronized Object getProperty (String name, ImageObserver observer) |
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getGraphics () |
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{ |
{ |
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return g; |
if (addObserver(observer)) |
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} |
return UndefinedProperty; |
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public synchronized Object |
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getProperty (String name, ImageObserver observer) |
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{ |
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if (props == null) |
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{ |
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propertyObservers.addElement (observer); |
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return null; |
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} |
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Object value = props.get (name); |
Object value = props.get (name); |
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return (value == null) ? UndefinedProperty : value; |
return (value == null) ? UndefinedProperty : value; |
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} |
} |
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public synchronized void |
/** |
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flush () |
* Returns the source of this image. |
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{ |
*/ |
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isLoaded = false; |
public ImageProducer getSource () |
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isCacheable = true; |
{ |
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width = height = -1; |
return new MemoryImageSource(width, height, nativeModel, getPixels(), |
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props = null; |
0, width); |
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pixelCache = null; |
} |
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model = null; |
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/** |
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if (source != null) |
* Creates a GdkGraphics context for this pixmap. |
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{ |
*/ |
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source.removeConsumer (this); |
public Graphics getGraphics () |
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source.addConsumer (this); |
{ |
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} |
if (!isLoaded) |
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} |
return null; |
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if (offScreen) |
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public boolean |
return new GdkGraphics(this); |
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isLoaded () |
else |
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{ |
throw new IllegalAccessError("This method only works for off-screen" |
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return isLoaded; |
+" Images."); |
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} |
} |
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/* ImageConsumer methods */ |
/** |
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* Returns a scaled instance of this pixmap. |
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public synchronized void |
*/ |
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setDimensions (int width, int height) |
public Image getScaledInstance(int width, |
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int height, |
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int hints) |
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{ |
{ |
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pixelCache = new int[width*height]; |
if (width <= 0 || height <= 0) |
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throw new IllegalArgumentException("Width and height of scaled bitmap"+ |
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this.width = width; |
"must be >= 0"); |
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this.height = height; |
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for (int i = 0; i < widthObservers.size (); i++) |
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{ |
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ImageObserver io = (ImageObserver) widthObservers.elementAt (i); |
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if (io != null) |
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io.imageUpdate (this, ImageObserver.WIDTH, -1, -1, width, height); |
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} |
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for (int i = 0; i < heightObservers.size (); i++) |
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{ |
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ImageObserver io = (ImageObserver) heightObservers.elementAt (i); |
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if (io != null) |
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io.imageUpdate (this, ImageObserver.HEIGHT, -1, -1, width, height); |
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} |
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if (observer != null) |
return new GtkImage(this, width, height, hints); |
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observer.imageUpdate (this, |
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(ImageObserver.WIDTH |
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| ImageObserver.HEIGHT), |
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-1, -1, width, height); |
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} |
} |
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public synchronized void |
/** |
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setProperties (Hashtable props) |
* If the image is loaded and comes from an ImageProducer, |
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* regenerate the image from there. |
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* |
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* I have no idea if this is ever actually used. Since GtkImage can't be |
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* instantiated directly, how is the user to know if it was created from |
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* an ImageProducer or not? |
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*/ |
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public synchronized void flush () |
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{ |
{ |
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this.props = props; |
if (isLoaded && source != null) |
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for (int i = 0; i < propertyObservers.size (); i++) |
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{ |
{ |
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ImageObserver io = (ImageObserver) propertyObservers.elementAt (i); |
observers = new Vector(); |
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if (io != null) |
isLoaded = false; |
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io.imageUpdate (this, ImageObserver.PROPERTIES, -1, -1, width, height); |
freePixmap(); |
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source.startProduction(new GtkImageConsumer(this, source)); |
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} |
} |
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} |
} |
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public synchronized void |
public void finalize() |
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setColorModel (ColorModel model) |
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{ |
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if (this.model == null || this.model.equals(model)) |
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this.model = model; |
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else |
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isCacheable = false; |
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} |
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public synchronized void |
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setHints (int flags) |
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{ |
{ |
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if (isLoaded) |
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freePixmap(); |
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} |
} |
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public synchronized void |
/** |
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setPixels (int x, int y, int width, int height, ColorModel cm, byte[] pixels, |
* Returns the image status, used by GtkToolkit |
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int offset, int scansize) |
*/ |
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public int checkImage (ImageObserver observer) |
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{ |
{ |
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setPixels (x, y, width, height, cm, convertPixels (pixels), offset, |
if (addObserver(observer)) |
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scansize); |
return 0; |
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if (observer != null) |
return ImageObserver.ALLBITS | ImageObserver.WIDTH | ImageObserver.HEIGHT; |
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observer.imageUpdate (this, |
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ImageObserver.SOMEBITS, |
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x, y, width, height); |
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} |
} |
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public synchronized void |
// Drawing methods //////////////////////////////////////////////// |
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setPixels (int x, int y, int width, int height, ColorModel cm, int[] pixels, |
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int offset, int scansize) |
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{ |
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loading = true; |
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if (!isCacheable) |
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return; |
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if (!cm.equals(model) || pixelCache == null) |
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{ |
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isCacheable = false; |
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return; |
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} |
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if (scansize == width && height == 1) |
/** |
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{ |
* Draws an image with eventual scaling/transforming. |
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// Copy contents of pixels array into pixel cache. |
*/ |
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System.arraycopy (pixels, offset, |
public boolean drawImage (GdkGraphics g, int dx1, int dy1, int dx2, int dy2, |
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pixelCache, y * this.width + x, |
int sx1, int sy1, int sx2, int sy2, |
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pixels.length - offset); |
Color bgcolor, ImageObserver observer) |
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} |
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else // skip over scansize-width for each row |
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{ |
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for (int i = 0; i < height; i++) |
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System.arraycopy (pixels, offset + (i * scansize), |
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pixelCache, (y + i) * this.width + x, |
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width); |
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} |
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} |
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public synchronized void |
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imageComplete (int status) |
|
360 |
{ |
{ |
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if (status == ImageConsumer.STATICIMAGEDONE && isCacheable) |
if (addObserver(observer)) |
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isLoaded = true; |
return false; |
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if (status == ImageConsumer.SINGLEFRAME) |
boolean flipX = (dx1 > dx2)^(sx1 > sx2); |
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isCacheable = false; |
boolean flipY = (dy1 > dy2)^(sy1 > sy2); |
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int dstWidth = Math.abs (dx2 - dx1); |
367 |
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int dstHeight = Math.abs (dy2 - dy1); |
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int srcWidth = Math.abs (sx2 - sx1); |
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int srcHeight = Math.abs (sy2 - sy1); |
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int srcX = (sx1 < sx2) ? sx1 : sx2; |
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int srcY = (sy1 < sy2) ? sy1 : sy2; |
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int dstX = (dx1 < dx2) ? dx1 : dx2; |
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int dstY = (dy1 < dy2) ? dy1 : dy2; |
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|
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if (observer != null) |
// Clipping. This requires the dst to be scaled as well, |
376 |
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if (srcWidth + srcX > width) |
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{ |
{ |
378 |
if (status == ImageConsumer.IMAGEERROR) |
dstWidth = (int)((double)dstWidth * (double)(width - srcX)/(double)srcWidth); |
379 |
observer.imageUpdate (null, |
srcWidth = width - srcX; |
380 |
ImageObserver.ERROR, |
} |
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-1, -1, -1, -1); |
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else |
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observer.imageUpdate (null, |
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ImageObserver.ALLBITS, |
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-1, -1, -1, -1); |
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} |
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if (source != null && status != ImageConsumer.SINGLEFRAME) |
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source.removeConsumer (this); |
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} |
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382 |
public synchronized void |
if (srcHeight + srcY > height) |
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startProduction (GtkImagePainter painter) |
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{ |
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if (isLoaded) |
|
383 |
{ |
{ |
384 |
painter.setDimensions (width, height); |
dstHeight = (int)((double)dstHeight * (double)(width - srcY)/(double)srcHeight); |
385 |
painter.setPixels (0, 0, width, height, model, pixelCache, 0, width); |
srcHeight = height - srcY; |
386 |
} |
} |
387 |
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388 |
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if(bgcolor != null) |
389 |
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drawPixelsScaledFlipped (g, bgcolor.getRed (), bgcolor.getGreen (), |
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bgcolor.getBlue (), |
391 |
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flipX, flipY, |
392 |
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srcX, srcY, |
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srcWidth, srcHeight, |
394 |
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dstX, dstY, |
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dstWidth, dstHeight, |
396 |
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true); |
397 |
else |
else |
398 |
{ |
drawPixelsScaledFlipped (g, 0, 0, 0, flipX, flipY, |
399 |
if (source != null) |
srcX, srcY, srcWidth, srcHeight, |
400 |
{ |
dstX, dstY, dstWidth, dstHeight, |
401 |
source.startProduction (painter); |
false); |
402 |
source.removeConsumer (painter); |
return true; |
403 |
} |
} |
404 |
} |
|
405 |
} |
/** |
406 |
|
* Draws an image to the GdkGraphics context, at (x,y) scaled to |
407 |
private int[] |
* width and height, with optional compositing with a background color. |
408 |
convertPixels (byte[] pixels) |
*/ |
409 |
{ |
public boolean drawImage (GdkGraphics g, int x, int y, int width, int height, |
410 |
int ret[] = new int[pixels.length]; |
Color bgcolor, ImageObserver observer) |
411 |
|
{ |
412 |
|
if (addObserver(observer)) |
413 |
|
return false; |
414 |
|
|
415 |
|
if(bgcolor != null) |
416 |
|
drawPixelsScaled(g, bgcolor.getRed (), bgcolor.getGreen (), |
417 |
|
bgcolor.getBlue (), x, y, width, height, true); |
418 |
|
else |
419 |
|
drawPixelsScaled(g, 0, 0, 0, x, y, width, height, false); |
420 |
|
|
421 |
for (int i = 0; i < pixels.length; i++) |
return true; |
|
ret[i] = pixels[i]; |
|
|
|
|
|
return ret; |
|
422 |
} |
} |
423 |
|
|
424 |
synchronized int |
// Private methods //////////////////////////////////////////////// |
425 |
checkImage () |
|
426 |
|
/** |
427 |
|
* Delivers notifications to all queued observers. |
428 |
|
*/ |
429 |
|
private void deliver() |
430 |
{ |
{ |
431 |
int bits = 0; |
int flags = ImageObserver.HEIGHT | |
432 |
|
ImageObserver.WIDTH | |
433 |
|
ImageObserver.PROPERTIES | |
434 |
|
ImageObserver.ALLBITS; |
435 |
|
|
436 |
if (width != -1) |
for(int i=0; i < observers.size(); i++) |
437 |
bits |= ImageObserver.WIDTH; |
((ImageObserver)observers.elementAt(i)). |
438 |
if (height != -1) |
imageUpdate(this, flags, 0, 0, width, height); |
|
bits |= ImageObserver.HEIGHT; |
|
|
if (props != null) |
|
|
bits |= ImageObserver.PROPERTIES; |
|
|
if (loading) |
|
|
bits |= ImageObserver.SOMEBITS; |
|
|
if (isLoaded) |
|
|
bits |= ImageObserver.ALLBITS; |
|
439 |
|
|
440 |
return bits; |
observers = null; |
441 |
|
} |
442 |
|
|
443 |
|
/** |
444 |
|
* Adds an observer, if we need to. |
445 |
|
* @return true if an observer was added. |
446 |
|
*/ |
447 |
|
private boolean addObserver(ImageObserver observer) |
448 |
|
{ |
449 |
|
if (!isLoaded) |
450 |
|
{ |
451 |
|
if(observer != null) |
452 |
|
if (!observers.contains (observer)) |
453 |
|
observers.addElement (observer); |
454 |
|
return true; |
455 |
|
} |
456 |
|
return false; |
457 |
} |
} |
458 |
} |
} |