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Diffstat (limited to 'gnu/java/awt/peer/gtk/ComponentGraphics.java')
| -rw-r--r-- | gnu/java/awt/peer/gtk/ComponentGraphics.java | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/gnu/java/awt/peer/gtk/ComponentGraphics.java b/gnu/java/awt/peer/gtk/ComponentGraphics.java new file mode 100644 index 000000000..5f17d7bef --- /dev/null +++ b/gnu/java/awt/peer/gtk/ComponentGraphics.java @@ -0,0 +1,220 @@ +/* ComponentGraphics.java -- + Copyright (C) 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.gtk; + +import java.awt.Color; +import java.awt.Font; +import java.awt.Graphics; +import java.awt.Graphics2D; +import java.awt.GraphicsConfiguration; +import java.awt.Image; +import java.awt.Rectangle; +import java.awt.Shape; +import java.awt.font.FontRenderContext; +import java.awt.font.GlyphVector; +import java.awt.geom.AffineTransform; +import java.awt.geom.Rectangle2D; +import java.awt.image.BufferedImage; +import java.awt.image.ImageObserver; +import java.awt.image.ImagingOpException; +import java.awt.image.RenderedImage; + +/** + * ComponentGraphics - context for drawing directly to a component, + * as this is an X drawable, it requires that we use GTK locks. + * + * This context draws directly to the drawable and requires xrender. + */ +public class ComponentGraphics extends CairoGraphics2D +{ + private GtkComponentPeer component; + private long cairo_t; + + private ComponentGraphics(GtkComponentPeer component) + { + this.component = component; + cairo_t = initState(component); + setup( cairo_t ); + Rectangle bounds = component.awtComponent.getBounds(); + setClip( new Rectangle( 0, 0, bounds.width, bounds.height) ); + setBackground(component.awtComponent.getBackground()); + setColor(component.awtComponent.getForeground()); + } + + private ComponentGraphics(ComponentGraphics cg) + { + component = cg.component; + cairo_t = initState(component); + copy( cg, cairo_t ); + Rectangle bounds = component.awtComponent.getBounds(); + setClip( new Rectangle( 0, 0, bounds.width, bounds.height) ); + setBackground(component.awtComponent.getBackground()); + setColor(component.awtComponent.getForeground()); + } + + /** + * Creates a cairo_t for the component surface and return it. + */ + private native long initState(GtkComponentPeer component); + + /** + * Grab lock + */ + private native void start_gdk_drawing(); + + /** + * Release lock + */ + private native void end_gdk_drawing(); + + /** + * Query if the system has the XRender extension. + */ + public static native boolean hasXRender(); + + + private native void copyAreaNative(GtkComponentPeer component, int x, int y, + int width, int height, int dx, int dy); + + private native void drawVolatile(GtkComponentPeer component, + Image vimg, int x, int y, + int width, int height); + + /** + * Returns a Graphics2D object for a component, either an instance of this + * class (if xrender is supported), or a context which copies. + */ + public static Graphics2D getComponentGraphics(GtkComponentPeer component) + { + if( hasXRender() ) + return new ComponentGraphics(component); + + Rectangle r = component.awtComponent.getBounds(); + return new ComponentGraphicsCopy(r.width, r.height, component); + } + + public GraphicsConfiguration getDeviceConfiguration() + { + return component.getGraphicsConfiguration(); + } + + public Graphics create() + { + return new ComponentGraphics(this); + } + + protected Rectangle2D getRealBounds() + { + return component.awtComponent.getBounds(); + } + + public void copyAreaImpl(int x, int y, int width, int height, int dx, int dy) + { + copyAreaNative(component, x, y, width, height, dx, dy); + } + + /** + * Overloaded methods that do actual drawing need to enter the gdk threads + * and also do certain things before and after. + */ + public void draw(Shape s) + { + start_gdk_drawing(); + super.draw(s); + end_gdk_drawing(); + } + + public void fill(Shape s) + { + start_gdk_drawing(); + super.fill(s); + end_gdk_drawing(); + } + + public void drawRenderedImage(RenderedImage image, AffineTransform xform) + { + start_gdk_drawing(); + super.drawRenderedImage(image, xform); + end_gdk_drawing(); + } + + protected boolean drawImage(Image img, AffineTransform xform, + Color bgcolor, ImageObserver obs) + { + start_gdk_drawing(); + boolean rv = super.drawImage(img, xform, bgcolor, obs); + end_gdk_drawing(); + return rv; + } + + public void drawGlyphVector(GlyphVector gv, float x, float y) + { + start_gdk_drawing(); + super.drawGlyphVector(gv, x, y); + end_gdk_drawing(); + } + + public boolean drawImage(Image img, int x, int y, ImageObserver observer) + { + if( img instanceof GtkVolatileImage ) + { + ((GtkVolatileImage)img).validate( null ); + drawVolatile( component, img, x, y-20 , + ((GtkVolatileImage)img).width, + ((GtkVolatileImage)img).height ); + return true; + } + return super.drawImage( img, x, y, observer ); + } + + public boolean drawImage(Image img, int x, int y, int width, int height, + ImageObserver observer) + { + if( img instanceof GtkVolatileImage ) + { + ((GtkVolatileImage)img).validate( null ); + drawVolatile( component, img, x, y-20, + width, height ); + return true; + } + return super.drawImage( img, x, y, width, height, observer ); + } + +} + |