diff options
Diffstat (limited to 'libjava/classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java')
| -rw-r--r-- | libjava/classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java | 941 |
1 files changed, 941 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java b/libjava/classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java new file mode 100644 index 000000000..50161b2b7 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/peer/gtk/ComponentGraphics.java @@ -0,0 +1,941 @@ +/* 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 gnu.classpath.Pointer; + +import java.awt.AlphaComposite; +import java.awt.Color; +import java.awt.Graphics; +import java.awt.Graphics2D; +import java.awt.GraphicsConfiguration; +import java.awt.Image; +import java.awt.Point; +import java.awt.Rectangle; +import java.awt.Shape; +import java.awt.Toolkit; +import java.awt.font.GlyphVector; +import java.awt.geom.AffineTransform; +import java.awt.geom.Point2D; +import java.awt.geom.Rectangle2D; +import java.awt.image.BufferedImage; +import java.awt.image.ColorModel; +import java.awt.image.ImageObserver; +import java.awt.image.ImageProducer; +import java.awt.image.Raster; +import java.awt.image.RenderedImage; +import java.awt.image.WritableRaster; +import java.util.Hashtable; + +/** + * 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 static final boolean hasXRenderExtension = hasXRender(); + + private GtkComponentPeer component; + protected long cairo_t; + private BufferedImage buffer, componentBuffer; + + private static ThreadLocal<Integer> hasLock = new ThreadLocal<Integer>(); + private static Integer ONE = Integer.valueOf(1); + + ComponentGraphics() + { + } + + 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); + + /** + * Obtain and hold a GDK lock, which is required for all drawing operations + * in this graphics context (since it is backed by an X surface). + * + * This method causes the GDK locking behaviour to be re-entrant. No race + * conditions are caused since a ThreadLocal is used and each thread has its + * own lock counter. + */ + private void lock() + { + Integer i = hasLock.get(); + if (i == null) + { + start_gdk_drawing(); + hasLock.set(ONE); + } + else + hasLock.set(Integer.valueOf(i.intValue() + 1)); + } + + /** + * Release the re-entrant GDK lock. + */ + private void unlock() + { + Integer i = hasLock.get(); + if (i == null) + throw new IllegalStateException(); + if (i == ONE) + { + hasLock.set(null); + end_gdk_drawing(); + } + else if (i.intValue() == 2) + hasLock.set(ONE); + else + hasLock.set(Integer.valueOf(i.intValue() - 1)); + } + + /** + * Creates a cairo_t for a volatile image + */ + protected native long initFromVolatile( long pixmapPtr); + + /** + * 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(); + + /** + * This is a utility method (used by GtkComponentPeer) for grabbing the + * image of a component. + */ + private static native Pointer nativeGrab(GtkComponentPeer component); + + private native void copyAreaNative(GtkComponentPeer component, int x, int y, + int width, int height, int dx, int dy); + + private native void drawVolatile(GtkComponentPeer component, + long vimg, int x, int y, + int width, int height, int cx, int cy, + int cw, int ch); + + /** + * Not really related (moveme?). Utility method used by GtkComponent. + */ + public static GtkImage grab( GtkComponentPeer component ) + { + return new GtkImage( nativeGrab( component ) ); + } + + /** + * 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( hasXRenderExtension ) + 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) + { + if (comp == null || comp instanceof AlphaComposite) + super.draw(s); + + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setStroke(this.getStroke()); + g2d.setColor(this.getColor()); + g2d.draw(s); + + drawComposite(s.getBounds2D(), null); + } + } + + public void fill(Shape s) + { + if (comp == null || comp instanceof AlphaComposite) + super.fill(s); + + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setPaint(this.getPaint()); + g2d.setColor(this.getColor()); + g2d.fill(s); + + drawComposite(s.getBounds2D(), null); + } + } + + public void drawRenderedImage(RenderedImage image, AffineTransform xform) + { + if (comp == null || comp instanceof AlphaComposite) + super.drawRenderedImage(image, xform); + + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setRenderingHints(this.getRenderingHints()); + g2d.drawRenderedImage(image, xform); + + drawComposite(buffer.getRaster().getBounds(), null); + } + } + + protected boolean drawImage(Image img, AffineTransform xform, + Color bgcolor, ImageObserver obs) + { + boolean rv; + if (comp == null || comp instanceof AlphaComposite) + rv = super.drawImage(img, xform, bgcolor, obs); + + else + { + // Get buffered image of source + if( !(img instanceof BufferedImage) ) + { + ImageProducer source = img.getSource(); + if (source == null) + return false; + img = Toolkit.getDefaultToolkit().createImage(source); + } + BufferedImage bImg = (BufferedImage) img; + + // Find translated bounds + Point2D origin = new Point2D.Double(bImg.getMinX(), bImg.getMinY()); + Point2D pt = new Point2D.Double(bImg.getWidth() + bImg.getMinX(), + bImg.getHeight() + bImg.getMinY()); + if (xform != null) + { + origin = xform.transform(origin, origin); + pt = xform.transform(pt, pt); + } + + // Create buffer and draw image + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setRenderingHints(this.getRenderingHints()); + g2d.drawImage(img, xform, obs); + + // Perform compositing + rv = drawComposite(new Rectangle2D.Double(origin.getX(), + origin.getY(), + pt.getX(), pt.getY()), + obs); + } + return rv; + } + + public void drawGlyphVector(GlyphVector gv, float x, float y) + { + if (comp == null || comp instanceof AlphaComposite) + super.drawGlyphVector(gv, x, y); + + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setPaint(this.getPaint()); + g2d.setStroke(this.getStroke()); + g2d.drawGlyphVector(gv, x, y); + + Rectangle2D bounds = gv.getLogicalBounds(); + bounds = new Rectangle2D.Double(x + bounds.getX(), y + bounds.getY(), + bounds.getWidth(), bounds.getHeight()); + drawComposite(bounds, null); + } + } + + public boolean drawImage(Image img, int x, int y, ImageObserver observer) + { + // If it is a GtkVolatileImage with an "easy" transform then + // draw directly. Always pass a BufferedImage to super to avoid + // deadlock (see Note in CairoGraphics.drawImage()). + if (img instanceof GtkVolatileImage) + { + GtkVolatileImage vimg = (GtkVolatileImage) img; + int type = transform.getType(); + if ((type == AffineTransform.TYPE_IDENTITY + || type == AffineTransform.TYPE_TRANSLATION) + && (clip == null || clip instanceof Rectangle2D)) + { + Rectangle2D r = (Rectangle2D) clip; + if (r == null) + r = getRealBounds(); + x += transform.getTranslateX(); + y += transform.getTranslateY(); + drawVolatile(component, vimg.nativePointer, + x, y, vimg.width, vimg.height, + (int) (r.getX() + transform.getTranslateX()), + (int) (r.getY() + transform.getTranslateY()), + (int) r.getWidth(), + (int) r.getHeight()); + return true; + } + else + return super.drawImage(vimg.getSnapshot(), x, y, observer); + } + + BufferedImage bimg; + if (img instanceof BufferedImage) + bimg = (BufferedImage) img; + else + { + ImageProducer source = img.getSource(); + if (source == null) + return false; + bimg = (BufferedImage) Toolkit.getDefaultToolkit().createImage(source); + } + return super.drawImage(bimg, x, y, observer); + } + + public boolean drawImage(Image img, int x, int y, int width, int height, + ImageObserver observer) + { + // If it is a GtkVolatileImage with an "easy" transform then + // draw directly. Always pass a BufferedImage to super to avoid + // deadlock (see Note in CairoGraphics.drawImage()). + if (img instanceof GtkVolatileImage + && (clip == null || clip instanceof Rectangle2D)) + { + GtkVolatileImage vimg = (GtkVolatileImage) img; + int type = transform.getType(); + if ((type == AffineTransform.TYPE_IDENTITY + || type == AffineTransform.TYPE_TRANSLATION) + && (clip == null || clip instanceof Rectangle2D)) + { + Rectangle2D r = (Rectangle2D) clip; + if (r == null) + r = getRealBounds(); + x += transform.getTranslateX(); + y += transform.getTranslateY(); + drawVolatile(component, vimg.nativePointer, + x, y, width, height, + (int) (r.getX() + transform.getTranslateX()), + (int) (r.getY() + transform.getTranslateY()), + (int) r.getWidth(), + (int) r.getHeight()); + return true; + } + else + return super.drawImage(vimg.getSnapshot(), x, y, + width, height, observer); + } + + BufferedImage bimg; + img = AsyncImage.realImage(img, observer); + if (img instanceof BufferedImage) + bimg = (BufferedImage) img; + else + { + ImageProducer source = img.getSource(); + if (source == null) + return false; + bimg = (BufferedImage) Toolkit.getDefaultToolkit().createImage(source); + } + return super.drawImage(bimg, x, y, width, height, observer); + } + + private boolean drawComposite(Rectangle2D bounds, ImageObserver observer) + { + // Clip source to visible areas that need updating + Rectangle2D clip = this.getClipBounds(); + Rectangle2D.intersect(bounds, clip, bounds); + clip = new Rectangle(buffer.getMinX(), buffer.getMinY(), + buffer.getWidth(), buffer.getHeight()); + Rectangle2D.intersect(bounds, clip, bounds); + + BufferedImage buffer2 = buffer; + if (!bounds.equals(buffer2.getRaster().getBounds())) + buffer2 = buffer2.getSubimage((int)bounds.getX(), (int)bounds.getY(), + (int)bounds.getWidth(), + (int)bounds.getHeight()); + + // Get destination clip to bounds + double[] points = new double[] {bounds.getX(), bounds.getY(), + bounds.getMaxX(), bounds.getMaxY()}; + transform.transform(points, 0, points, 0, 2); + + Rectangle2D deviceBounds = new Rectangle2D.Double(points[0], points[1], + points[2] - points[0], + points[3] - points[1]); + + Rectangle2D.intersect(deviceBounds, this.getClipInDevSpace(), deviceBounds); + + // Get current image on the component + GtkImage img = grab(component); + Graphics gr = componentBuffer.createGraphics(); + gr.drawImage(img, 0, 0, null); + gr.dispose(); + + BufferedImage cBuffer = componentBuffer; + if (!deviceBounds.equals(cBuffer.getRaster().getBounds())) + cBuffer = cBuffer.getSubimage((int)deviceBounds.getX(), + (int)deviceBounds.getY(), + (int)deviceBounds.getWidth(), + (int)deviceBounds.getHeight()); + + // Perform actual composite operation + compCtx.compose(buffer2.getRaster(), cBuffer.getRaster(), + cBuffer.getRaster()); + + // This MUST call directly into the "action" method in CairoGraphics2D, + // not one of the wrappers, to ensure that the composite isn't processed + // more than once! + boolean rv = super.drawImage(cBuffer, + AffineTransform.getTranslateInstance(bounds.getX(), + bounds.getY()), + null, null); + return rv; + } + + private void createBuffer() + { + if (buffer == null) + { + WritableRaster rst; + rst = Raster.createWritableRaster(GtkVolatileImage.createGdkSampleModel(component.awtComponent.getWidth(), + component.awtComponent.getHeight()), + new Point(0,0)); + + buffer = new BufferedImage(GtkVolatileImage.gdkColorModel, rst, + GtkVolatileImage.gdkColorModel.isAlphaPremultiplied(), + new Hashtable()); + } + else + { + Graphics2D g2d = ((Graphics2D)buffer.getGraphics()); + + g2d.setBackground(new Color(0,0,0,0)); + g2d.clearRect(0, 0, buffer.getWidth(), buffer.getHeight()); + } + + if (componentBuffer == null) + { + WritableRaster rst; + rst = Raster.createWritableRaster(GtkVolatileImage.createGdkSampleModel(component.awtComponent.getWidth(), + component.awtComponent.getHeight()), + new Point(0,0)); + + componentBuffer = new BufferedImage(GtkVolatileImage.gdkColorModel, rst, + GtkVolatileImage.gdkColorModel.isAlphaPremultiplied(), + new Hashtable()); + } + } + + protected ColorModel getNativeCM() + { + return GtkVolatileImage.gdkColorModel; + } + + /* --- START OVERRIDDEN NATIVE METHODS ---- + * All native methods in CairoGraphics2D should be overridden here and + * enclosed in locks, since the cairo surface is backed by an X surface + * in this graphics context and the X surface requires external locking. + * + * We lock everything "just in case", since it's difficult to know which + * calls are and aren't thread-safe. Overriding and locking the native + * methods allows superclass code in CairoGraphics2D to execute properly, + * without the need to override every single method. + * + * CAVEAT: if native code obtains a lock (using gdk_threads_enter(), not the + * lock() method provided here) and then calls back into Java and one of these + * methods ends up being called, we will deadlock. The lock is only reentrant + * when called via our lock() method. + */ + + /* These methods are already locked in the superclass CairoGraphics2D + * so they do not need to be overridden: + * + * public void disposeNative + * + * protected void cairoDrawGlyphVector + * + * protected void cairoSetFont + */ + + @Override + protected long init(long pointer) + { + long ret; + + try + { + lock(); + ret = super.init(pointer); + } + finally + { + unlock(); + } + + return ret; + } + + @Override + protected void drawPixels(long pointer, int[] pixels, int w, int h, + int stride, double[] i2u, double alpha, + int interpolation) + { + try + { + lock(); + super.drawPixels(pointer, pixels, w, h, stride, i2u, alpha, + interpolation); + } + finally + { + unlock(); + } + } + + @Override + protected void setGradient(long pointer, double x1, double y1, + double x2, double y2, + int r1, int g1, int b1, int a1, + int r2, int g2, int b2, int a2, boolean cyclic) + { + try + { + lock(); + super.setGradient(pointer, x1, y1, x2, y2, r1, g1, b1, a1, r2, g2, b2, a2, + cyclic); + } + finally + { + unlock(); + } + } + + @Override + protected void setPaintPixels(long pointer, int[] pixels, int w, int h, + int stride, boolean repeat, int x, int y) + { + try + { + lock(); + super.setPaintPixels(pointer, pixels, w, h, stride, repeat, x, y); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSetMatrix(long pointer, double[] m) + { + try + { + lock(); + super.cairoSetMatrix(pointer, m); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoScale(long pointer, double x, double y) + { + try + { + lock(); + super.cairoScale(pointer, x, y); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSetOperator(long pointer, int cairoOperator) + { + try + { + lock(); + super.cairoSetOperator(pointer, cairoOperator); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSetRGBAColor(long pointer, double red, double green, + double blue, double alpha) + { + try + { + lock(); + super.cairoSetRGBAColor(pointer, red, green, blue, alpha); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSetFillRule(long pointer, int cairoFillRule) + { + try + { + lock(); + super.cairoSetFillRule(pointer, cairoFillRule); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSetLine(long pointer, double width, int cap, int join, + double miterLimit) + { + try + { + lock(); + super.cairoSetLine(pointer, width, cap, join, miterLimit); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSetDash(long pointer, double[] dashes, int ndash, + double offset) + { + try + { + lock(); + super.cairoSetDash(pointer, dashes, ndash, offset); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoRectangle(long pointer, double x, double y, + double width, double height) + { + try + { + lock(); + super.cairoRectangle(pointer, x, y, width, height); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoArc(long pointer, double x, double y, + double radius, double angle1, double angle2) + { + try + { + lock(); + super.cairoArc(pointer, x, y, radius, angle1, angle2); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSave(long pointer) + { + try + { + lock(); + super.cairoSave(pointer); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoRestore(long pointer) + { + try + { + lock(); + super.cairoRestore(pointer); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoNewPath(long pointer) + { + try + { + lock(); + super.cairoNewPath(pointer); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoClosePath(long pointer) + { + try + { + lock(); + super.cairoClosePath(pointer); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoMoveTo(long pointer, double x, double y) + { + try + { + lock(); + super.cairoMoveTo(pointer, x, y); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoLineTo(long pointer, double x, double y) + { + try + { + lock(); + super.cairoLineTo(pointer, x, y); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoCurveTo(long pointer, double x1, double y1, double x2, + double y2, double x3, double y3) + { + try + { + lock(); + super.cairoCurveTo(pointer, x1, y1, x2, y2, x3, y3); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoStroke(long pointer) + { + try + { + lock(); + super.cairoStroke(pointer); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoFill(long pointer, double alpha) + { + try + { + lock(); + super.cairoFill(pointer, alpha); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoClip(long pointer) + { + try + { + lock(); + super.cairoClip(pointer); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoResetClip(long pointer) + { + try + { + lock(); + super.cairoResetClip(pointer); + } + finally + { + unlock(); + } + } + + @Override + protected void cairoSetAntialias(long pointer, boolean aa) + { + try + { + lock(); + super.cairoSetAntialias(pointer, aa); + } + finally + { + unlock(); + } + } + + @Override + protected void drawCairoSurface(CairoSurface surface, AffineTransform tx, + double alpha, int interpolation) + { + try + { + lock(); + super.drawCairoSurface(surface, tx, alpha, interpolation); + } + finally + { + unlock(); + } + } +} |