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Diffstat (limited to 'libjava/classpath/gnu/java/awt/peer/x/XGraphics.java')
-rw-r--r-- | libjava/classpath/gnu/java/awt/peer/x/XGraphics.java | 792 |
1 files changed, 792 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/peer/x/XGraphics.java b/libjava/classpath/gnu/java/awt/peer/x/XGraphics.java new file mode 100644 index 00000000000..134d7d3305e --- /dev/null +++ b/libjava/classpath/gnu/java/awt/peer/x/XGraphics.java @@ -0,0 +1,792 @@ +/* XGraphics.java -- The Graphics implementation for X + 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.x; + +import gnu.x11.Colormap; +import gnu.x11.Data; +import gnu.x11.Display; +import gnu.x11.Drawable; +import gnu.x11.GC; +import gnu.x11.Pixmap; +import gnu.x11.Point; +import gnu.x11.image.ZPixmap; + +import java.awt.AWTError; +import java.awt.Color; +import java.awt.Font; +import java.awt.FontMetrics; +import java.awt.Graphics; +import java.awt.Image; +import java.awt.Rectangle; +import java.awt.Shape; +import java.awt.Toolkit; +import java.awt.Transparency; +import java.awt.image.BufferedImage; +import java.awt.image.ImageObserver; +import java.awt.image.ImageProducer; +import java.text.AttributedCharacterIterator; +import java.util.HashMap; + +public class XGraphics + extends Graphics + implements Cloneable +{ + + /** + * The X Drawable to draw on. + */ + private Drawable xdrawable; + + /** + * The X graphics context (GC). + */ + private GC xgc; + + /** + * The current translation. + */ + private int translateX; + private int translateY; + + /** + * The current clip. Possibly null. + */ + private Rectangle clip; + + /** + * The current font, possibly null. + */ + private Font font; + + /** + * The current foreground color, possibly null. + */ + private Color foreground; + + /** + * Indicates if this object has been disposed. + */ + private boolean disposed = false; + + // TODO: Workaround for limitation in current Escher. + private Pixmap.Format pixmapFormat; + private int imageByteOrder; + private int pixelByteCount; + + /** + * Creates a new XGraphics on the specified X Drawable. + * + * @param d the X Drawable for which we create the Graphics + */ + XGraphics(Drawable d) + { + xdrawable = d; + xgc = new GC(d); + translateX = 0; + translateY = 0; + clip = new Rectangle(0, 0, d.width, d.height); + + Display display = xdrawable.display; + pixmapFormat = display.default_pixmap_format; + imageByteOrder = display.image_byte_order; + pixelByteCount = pixmapFormat.bits_per_pixel () / 8; + } + + /** + * Creates an exact copy of this graphics context. + * + * @return an exact copy of this graphics context + */ + public Graphics create() + { + XGraphics copy = (XGraphics) clone(); + return copy; + } + + /** + * Translates the origin by (x, y). + */ + public void translate(int x, int y) + { + translateX += x; + translateY += y; + if (clip != null) + { + clip.x -= x; + clip.y -= y; + } + } + + /** + * Returns the current foreground color, possibly <code>null</code>. + * + * @return the current foreground color, possibly <code>null</code> + */ + public Color getColor() + { + return foreground; + } + + /** + * Sets the current foreground color. A <code>null</code> value doesn't + * change the current setting. + * + * @param c the foreground color to set + */ + public void setColor(Color c) + { + if (c != null) + { + XToolkit tk = (XToolkit) Toolkit.getDefaultToolkit(); + HashMap colorMap = tk.colorMap; + gnu.x11.Color col = (gnu.x11.Color) colorMap.get(c); + if (col == null) + { + Colormap map = xdrawable.display.default_colormap; + col = map.alloc_color (c.getRed() * 256, + c.getGreen() * 256, + c.getBlue() * 256); + colorMap.put(c, col); + } + xgc.set_foreground(col); + foreground = c; + } + } + + public void setPaintMode() + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public void setXORMode(Color color) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + /** + * Returns the current font, possibly <code>null</code>. + * + * @return the current font, possibly <code>null</code> + */ + public Font getFont() + { + return font; + } + + /** + * Sets the font on the graphics context. A <code>null</code> value doesn't + * change the current setting. + * + * @param f the font to set + */ + public void setFont(Font f) + { + if (f != null) + { + XFontPeer xFontPeer = (XFontPeer) f.getPeer(); + xgc.set_font(xFontPeer.getXFont()); + font = f; + } + } + + /** + * Returns the font metrics for the specified font. + * + * @param font the font for which we want the font metrics + * + * @return the font metrics for the specified font + */ + public FontMetrics getFontMetrics(Font font) + { + if (font == null) + { + if (this.font == null) + setFont(new Font("Dialog", Font.PLAIN, 12)); + font = this.font; + } + XFontPeer xFontPeer = (XFontPeer) font.getPeer(); + return xFontPeer.getFontMetrics(font); + } + + /** + * Returns the bounds of the current clip. + * + * @return the bounds of the current clip + */ + public Rectangle getClipBounds() + { + return clip != null ? clip.getBounds() : null; + } + + /** + * Clips the current clip with the specified clip. + */ + public void clipRect(int x, int y, int width, int height) + { + if (clip == null) + { + clip = new Rectangle(x, y, width, height); + } + else + { + computeIntersection(x, y, width, height, clip); + } + // Update the X clip setting. + setXClip(clip.x, clip.y, clip.width, clip.height); + } + + /** + * Returns <code>true</code> when the specified rectangle intersects with + * the current clip, <code>false</code> otherwise. This is overridden to + * avoid unnecessary creation of Rectangles via getBounds(). + * + * @param x the x coordinate of the rectangle + * @param y the y coordinate of the rectangle + * @param w the width of the rectangle + * @param h the height of the rectangle + * + * @return <code>true</code> when the specified rectangle intersects with + * the current clip, <code>false</code> otherwise + */ + public boolean hitClip(int x, int y, int w, int h) + { + boolean hit; + if (clip == null) + { + hit = true; + } + else + { + // It's easier to determine if the rectangle lies outside the clip, + // so we determine that and reverse the result (if it's not completely + // outside, it most likely hits the clip rectangle). + int x2 = x + w; + int y2 = y + h; + int clipX2 = clip.x + clip.width; + int clipY2 = clip.y + clip.height; + boolean outside = (x < clip.x && x2 < clip.x) // Left. + || (x > clipX2 && x2 > clipX2) // Right. + || (y < clip.y && y2 < clip.y) // Top. + || (y > clipY2 && y2 > clipY2); // Bottom. + hit = ! outside; + } + return hit; + } + + public void setClip(int x, int y, int width, int height) + { + if (clip != null) + clip.setBounds(x, y, width, height); + else + clip = new Rectangle(x, y, width, height); + setXClip(clip.x, clip.y, clip.width, clip.height); + } + + /** + * Sets the clip on the X server GC. The coordinates are not yet translated, + * this will be performed by the X server. + * + * @param x the clip, X coordinate + * @param y the clip, Y coordinate + * @param w the clip, width + * @param h the clip, height + */ + private void setXClip(int x, int y, int w, int h) + { + gnu.x11.Rectangle[] clipRects = new gnu.x11.Rectangle[] { + new gnu.x11.Rectangle(x, y, w, h) }; + xgc.set_clip_rectangles(translateX, translateY, clipRects, GC.YX_BANDED); + } + + public Shape getClip() + { + // Return a copy here, so nobody can trash our clip. + return clip == null ? null : clip.getBounds(); + } + + /** + * Sets the current clip. + * + * @param c the clip to set + */ + public void setClip(Shape c) + { + if (c != null) + { + Rectangle b; + if (c instanceof Rectangle) + { + b = (Rectangle) c; + } + else + { + b = c.getBounds(); + } + clip.setBounds(b); + setXClip(b.x, b.y, b.width, b.height); + } + else + { + clip.setBounds(0, 0, xdrawable.width, xdrawable.height); + setXClip(0, 0, xdrawable.width, xdrawable.height); + } + } + + public void copyArea(int x, int y, int width, int height, int dx, int dy) + { + // Clip and translate src rectangle. + int srcX = Math.min(Math.max(x, clip.x), clip.x + clip.width) + + translateX; + int srcY = Math.min(Math.max(y, clip.y), clip.y + clip.height) + + translateY; + int srcWidth = Math.min(Math.max(x + width, clip.x), + clip.x + clip.width) - x; + int srcHeight = Math.min(Math.max(y + height, clip.y), + clip.y + clip.height) - y; + xdrawable.copy_area(xdrawable, xgc, srcX, srcY, srcWidth, srcHeight, + srcX + dx, srcY + dy); + } + + /** + * Draws a line from point (x1, y1) to point (x2, y2). + */ + public void drawLine(int x1, int y1, int x2, int y2) + { + //System.err.println("drawLine: " + (x1 + translateX) + ", " + ( y1 + translateY) + ", " + (x2 + translateX) + ", " + (y2 + translateY) + " on: " + xdrawable); + xdrawable.line(xgc, x1 + translateX, y1 + translateY, + x2 + translateX, y2 + translateY); + } + + /** + * Fills the specified rectangle. + */ + public void fillRect(int x, int y, int width, int height) + { + xdrawable.rectangle(xgc, x + translateX, y + translateY, + width, height, true); + } + + public void clearRect(int x, int y, int width, int height) + { + xgc.set_foreground(Color.WHITE.getRGB()); + xdrawable.rectangle(xgc, x, y, width, height, true); + if (foreground != null) + xgc.set_foreground(foreground.getRGB()); + } + + public void drawRoundRect(int x, int y, int width, int height, int arcWidth, + int arcHeight) + { + // Draw 4 lines. + int arcRadiusX = arcWidth / 2; + int arcRadiusY = arcHeight / 2; + drawLine(x + arcRadiusX, y, x + width - arcRadiusX, y); + drawLine(x, y + arcRadiusY, x, y + height - arcRadiusY); + drawLine(x + arcRadiusX, y + height, x + width - arcRadiusX, y + height); + drawLine(x + width, y + arcRadiusY, x + width, y + height - arcRadiusY); + + // Draw the 4 arcs at the corners. + // Upper left. + drawArc(x, y, arcWidth, arcHeight, 90, 90); + // Lower left. + drawArc(x, y + height - arcHeight, arcWidth, arcHeight, 180, 90); + // Upper right. + drawArc(x + width - arcWidth, y, arcWidth, arcHeight, 0, 90); + // Lower right. + drawArc(x + width - arcWidth, y + height - arcHeight, arcWidth, arcHeight, + 270, 90); + } + + public void fillRoundRect(int x, int y, int width, int height, int arcWidth, + int arcHeight) + { + // Fill the 3 rectangles that make up the inner area. + int arcRadiusX = arcWidth / 2; + int arcRadiusY = arcHeight / 2; + // Left. + fillRect(x, y + arcRadiusY, arcRadiusX, height - arcHeight); + // Middle. + fillRect(x + arcRadiusX, y, width - arcWidth, height); + // Right. + fillRect(x + width - arcRadiusX, y + arcRadiusY, arcRadiusX, + height - arcHeight); + + // Fill the 4 arcs in the corners. + // Upper left. + fillArc(x, y, arcWidth, arcHeight, 90, 90); + // Lower left. + fillArc(x, y + height - arcHeight, arcWidth, arcHeight, 180, 90); + // Upper right. + fillArc(x + width - arcWidth, y, arcWidth, arcHeight, 0, 90); + // Lower right. + fillArc(x + width - arcWidth, y + height - arcHeight, arcWidth, arcHeight, + 270, 90); + } + + public void drawOval(int x, int y, int width, int height) + { + xdrawable.arc(xgc, x, y, width, height, 0, 360 * 64, false); + } + + public void fillOval(int x, int y, int width, int height) + { + xdrawable.arc(xgc, x, y, width, height, 0, 360 * 64, true); + } + + public void drawArc(int x, int y, int width, int height, int arcStart, + int arcAngle) + { + xdrawable.arc(xgc, x, y, width, height, arcStart * 64, arcAngle * 64, false); + } + + public void fillArc(int x, int y, int width, int height, int arcStart, + int arcAngle) + { + xdrawable.arc(xgc, x, y, width, height, arcStart * 64, arcAngle * 64, true); + } + + public void drawPolyline(int[] xPoints, int[] yPoints, int npoints) + { + int numPoints = Math.min(xPoints.length, yPoints.length); + Point[] points = new Point[numPoints]; + // FIXME: Improve Escher API to accept arrays to avoid creation + // of many Point objects. + for (int i = 0; i < numPoints; i++) + points[i] = new Point(xPoints[i], yPoints[i]); + xdrawable.poly_line(xgc, points, Drawable.ORIGIN); + } + + public void drawPolygon(int[] xPoints, int[] yPoints, int npoints) + { + int numPoints = Math.min(xPoints.length, yPoints.length); + Point[] points = new Point[numPoints]; + // FIXME: Improve Escher API to accept arrays to avoid creation + // of many Point objects. + for (int i = 0; i < numPoints; i++) + points[i] = new Point(xPoints[i], yPoints[i]); + xdrawable.poly_line(xgc, points, Drawable.ORIGIN); + } + + public void fillPolygon(int[] xPoints, int[] yPoints, int npoints) + { + int numPoints = Math.min(xPoints.length, yPoints.length); + Point[] points = new Point[numPoints]; + // FIXME: Improve Escher API to accept arrays to avoid creation + // of many Point objects. + for (int i = 0; i < numPoints; i++) + points[i] = new Point(xPoints[i], yPoints[i]); + xdrawable.fill_poly(xgc, points, Drawable.COMPLEX, Drawable.ORIGIN); + } + + /** + * Draws the specified string at (x, y). + */ + public void drawString(String string, int x, int y) + { + if (disposed) + throw new AWTError("XGraphics already disposed"); + + xdrawable.text(xgc, x + translateX, y + translateY, string); + } + + public void drawString(AttributedCharacterIterator ci, int x, int y) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + /** + * Draws the specified image on the drawable at position (x,y). + */ + public boolean drawImage(Image image, int x, int y, ImageObserver observer) + { + if (image instanceof XImage) + { + XImage xim = (XImage) image; + Pixmap pm = xim.pixmap; + xdrawable.copy_area(pm, xgc, 0, 0, pm.width, pm.height, + x + translateX, y + translateY); + } + else if (image instanceof BufferedImage + && ((BufferedImage) image).getTransparency() != Transparency.OPAQUE) + { + BufferedImage bi = (BufferedImage) image; + int width = bi.getWidth(); + int height = bi.getHeight(); + Data img = xdrawable.image(x + translateX, y + translateY, + width, height, 0xFFFFFFFF, 2); + + // Compute line byte count. + int lineBitCount = width * pixmapFormat.bits_per_pixel (); + int rem = lineBitCount % pixmapFormat.scanline_pad (); + int linePadCount = lineBitCount / pixmapFormat.scanline_pad () + + (rem == 0 ? 0 : 1); + int lineByteCount = linePadCount * pixmapFormat.scanline_pad () / 8; + + // Composite source and destination pixel data. + int[] trgb = new int[3]; // The device rgb pixels. + for (int yy = 0; yy < height; yy++) + { + for (int xx = 0; xx < width; xx++) + { + getRGB(xx, yy, img, trgb, lineByteCount); + int srgb = bi.getRGB(xx, yy); + float alpha = ((srgb >> 24) & 0xff) / 256F; + float tAlpha = 1.F - alpha; + int red = (srgb >> 16) & 0xFF; + int green = (srgb >> 8) & 0xFF; + int blue = (srgb) & 0xFF; + trgb[0] = (int) (trgb[0] * tAlpha + red * alpha); + trgb[1] = (int) (trgb[1] * tAlpha + green * alpha); + trgb[2] = (int) (trgb[2] * tAlpha + blue * alpha); + setRGB(xx, yy, img, trgb, lineByteCount); + } + } + + // Now we have the transparent image composited onto the target + // Image, now we only must copy it to the Drawable. + ZPixmap pm = new ZPixmap(xdrawable.display); + pm.width = width; + pm.height = height; + pm.init(); + System.arraycopy(img.data, 32, pm.data, 0, img.data.length - 32); + xdrawable.put_image(xgc, pm, x + translateX, y + translateY); + } + else + { + // Pre-render the image into an XImage. + ImageProducer source = image.getSource(); + ImageConverter conv = new ImageConverter(); + source.startProduction(conv); + XImage xim = conv.getXImage(); + Pixmap pm = xim.pixmap; + xdrawable.copy_area(pm, xgc, 0, 0, pm.width, pm.height, + x + translateX, y + translateY); + } + return true; + } + + /** + * Helper method to work around limitation in the current Escher impl. + * + * @param x the x position + * @param y the y position + * @param img the image data + * @param rgb an 3-size array that holds the rgb values on method exit + */ + private void getRGB(int x, int y, Data img, int[] rgb, int lineByteCount) + { + // TODO: Does this also work on non-RGB devices? + int i = y * lineByteCount + pixelByteCount * x; + if (imageByteOrder == gnu.x11.image.Image.LSB_FIRST) + {//if (i >= 5716-33) System.err.println("lbc: " + lineByteCount + ", " + pixelByteCount); + rgb[2] = img.data[32 + i]; + rgb[1] = img.data[32 + i + 1]; + rgb[0] = img.data[32 + i + 2]; + } + else + { // MSB_FIRST + rgb[0] = img.data[32 + i]; + rgb[1] = img.data[32 + i + 1]; + rgb[2] = img.data[32 + i + 2]; + } + + } + + /** + * Helper method to work around limitation in the current Escher impl. + * + * @param x the x position + * @param y the y position + * @param img the image data + * @param rgb an 3-size array that holds the rgb values on method exit + */ + private void setRGB(int x, int y, Data img, int[] rgb, int lineByteCount) + { + // TODO: Does this also work on non-RGB devices? + int i = y * lineByteCount + pixelByteCount * x; + if (imageByteOrder == gnu.x11.image.Image.LSB_FIRST) + { + img.data[32 + i] = (byte) rgb[2]; + img.data[32 + i + 1] = (byte) rgb[1]; + img.data[32 + i + 2] = (byte) rgb[0]; + } + else + { // MSB_FIRST + img.data[32 + i] = (byte) rgb[0]; + img.data[32 + i + 1] = (byte) rgb[1]; + img.data[32 + i + 2] = (byte) rgb[2]; + } + } + + public boolean drawImage(Image image, int x, int y, int width, int height, + ImageObserver observer) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public boolean drawImage(Image image, int x, int y, Color bgcolor, + ImageObserver observer) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public boolean drawImage(Image image, int x, int y, int width, int height, + Color bgcolor, ImageObserver observer) + { + // FIXME: Implement this. + throw new UnsupportedOperationException("Not yet implemented"); + } + + public boolean drawImage(Image image, int dx1, int dy1, int dx2, int dy2, + int sx1, int sy1, int sx2, int sy2, + ImageObserver observer) + { + return drawImage(image, dx1, dy1, dx2, dy2, sx1, sy1, sx2, sy2, null, + observer); + } + + public boolean drawImage(Image image, int dx1, int dy1, int dx2, int dy2, + int sx1, int sy1, int sx2, int sy2, Color bgcolor, + ImageObserver observer) + { + + // FIXME: What to do with bgcolor? + + // Scale the image. + int sw = image.getWidth(observer); + int sh = image.getHeight(observer); + double scaleX = Math.abs(dx2 - dx1) / (double) Math.abs(sx2 - sx1); + double scaleY = Math.abs(dy2 - dy1) / (double) Math.abs(sy2 - sy1); + Image scaled = image.getScaledInstance((int) (scaleX * sw), + (int) (scaleY * sh), + Image.SCALE_FAST); + + // Scaled source coordinates. + int sx1s = (int) (scaleX * Math.min(sx1, sx2)); + int sx2s = (int) (scaleX * Math.max(sx1, sx2)); + + // Temporarily clip to the target rectangle. + Rectangle old = clip; + clipRect(dx1, dy1, dx2 - dx1, dy2 - dy1); + + // Draw scaled image. + boolean res = drawImage(scaled, dx1 - sx1s, dy1 - sx2s, observer); + + // Reset clip. + setClip(old); + + return res; + } + + /** + * Frees any resources associated with this object. + */ + public void dispose() + { + if (! disposed) + { + xgc.free(); + xdrawable.display.flush(); + disposed = true; + } + } + + // Additional helper methods. + + /** + * Creates and returns an exact copy of this XGraphics. + */ + protected Object clone() + { + try + { + XGraphics copy = (XGraphics) super.clone(); + copy.xgc = xgc.copy(); + if (clip != null) + { + copy.clip = new Rectangle(clip); + copy.setXClip(clip.x, clip.y, clip.width, clip.height); + } + return copy; + } + catch (CloneNotSupportedException ex) + { + assert false; + } + return null; + } + + /** + * Computes the intersection between two rectangles and stores the result + * int the second rectangle. + * + * This method has been copied from {@link javax.swing.SwingUtilities}. + * + * @param x the x coordinate of the rectangle #1 + * @param y the y coordinate of the rectangle #1 + * @param w the width of the rectangle #1 + * @param h the height of the rectangle #1 + * @param rect the rectangle #2 and output rectangle + */ + private static void computeIntersection(int x, int y, int w, int h, + Rectangle rect) + { + int x2 = (int) rect.x; + int y2 = (int) rect.y; + int w2 = (int) rect.width; + int h2 = (int) rect.height; + + int dx = (x > x2) ? x : x2; + int dy = (y > y2) ? y : y2; + int dw = (x + w < x2 + w2) ? (x + w - dx) : (x2 + w2 - dx); + int dh = (y + h < y2 + h2) ? (y + h - dy) : (y2 + h2 - dy); + + if (dw >= 0 && dh >= 0) + rect.setBounds(dx, dy, dw, dh); + else + rect.setBounds(0, 0, 0, 0); + } + + +} |