libjava/gnu/java/awt/peer/gtk/GtkImagePainter.java

   1 /* GtkImagePainter.java
   2    Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package gnu.java.awt.peer.gtk;
  39
  40 import java.awt.*;
  41 import java.awt.image.*;
  42 import java.util.*;
  43
  44 public class GtkImagePainter implements Runnable, ImageConsumer
  45 {
  46   GtkImage image;
  47   GdkGraphics gc;
  48   int startX, startY;
  49   int redBG;
  50   int greenBG;
  51   int blueBG;
  52   double affine[];
  53   int width, height;
  54   boolean flipX, flipY;
  55   Rectangle clip;
  56   int s_width, s_height;
  57
  58   public
  59   GtkImagePainter (GtkImage image, GdkGraphics gc, int x, int y,
  60                    int width, int height, Color bgcolor)
  61   {
  62     this.image = image;
  63     this.gc = (GdkGraphics) gc.create ();
  64     startX = x;
  65     startY = y;
  66     redBG = bgcolor.getRed ();
  67     greenBG = bgcolor.getGreen ();
  68     blueBG = bgcolor.getBlue ();
  69     this.width = width;
  70     this.height = height;
  71     flipX = flipY = false;
  72     s_width = s_height = 0;
  73     clip = null;
  74
  75     new Thread (this).start ();
  76   }
  77
  78   public
  79   GtkImagePainter (GtkImage image, GdkGraphics gc,
  80                    int dx1, int dy1, int dx2, int dy2,
  81                    int sx1, int sy1, int sx2, int sy2,
  82                    Color bgcolor)
  83   {
  84     this.image = image;
  85     this.gc = (GdkGraphics) gc.create ();
  86     startX = (dx1 < dx2) ? dx1 : dx2;
  87     startY = dy1;
  88     redBG = bgcolor.getRed ();
  89     greenBG = bgcolor.getGreen ();
  90     blueBG = bgcolor.getBlue ();
  91
  92     this.width = Math.abs (dx2 - dx1);
  93     this.height = Math.abs (dy2 - dy1);
  94
  95     flipX = ((dx1 > dx2 && sx2 > sx1)
  96              || (dx1 < dx2 && sx2 < sx1));
  97
  98     flipY = ((dy1 > dy2 && sy2 > sy1)
  99              || (dy1 < dy2 && sy2 < sy1));
 100
 101     s_width = Math.abs (sx2 - sx1);
 102     s_height = Math.abs (sy2 - sy1);
 103     clip = new Rectangle (sx1, sy1, s_width, s_height);
 104
 105     new Thread (this).start ();
 106   }
 107
 108   public void
 109   run ()
 110   {
 111     image.startProduction (this);
 112     gc.dispose ();
 113   }
 114
 115   /* Convert pixel data into a format that gdkrgb can understand */
 116   static int[]
 117   convertPixels (int[] pixels, ColorModel model)
 118   {
 119     if (model.equals (ColorModel.getRGBdefault ()))
 120       return pixels;
 121
 122     int ret[] = new int[pixels.length];
 123
 124     for (int i = 0; i < pixels.length; i++)
 125       ret[i] = model.getRGB (pixels[i]);
 126
 127     return ret;
 128   }
 129
 130   static int[]
 131   convertPixels (byte[] pixels, ColorModel model)
 132   {
 133     int ret[] = new int[pixels.length];
 134
 135     for (int i = 0; i < pixels.length; i++)
 136       ret[i] = model.getRGB (pixels[i]);
 137
 138     return ret;
 139   }
 140
 141   native void
 142   drawPixels (GdkGraphics gc, int bg_red, int bg_green, int bg_blue,
 143               int x, int y, int width, int height, int[] pixels, int offset,
 144               int scansize, double affine[]);
 145
 146
 147   public void
 148   setPixels (int x, int y, int width, int height, ColorModel model,
 149              int[] pixels, int offset, int scansize)
 150   {
 151     if (clip != null)
 152       {
 153         Rectangle r;
 154         r = clip.intersection (new Rectangle (x, y, width, height));
 155         if (r.width == 0 && r.height == 0)
 156           return;
 157
 158         offset += r.y * scansize + r.x;
 159
 160         r.translate (-Math.abs (clip.x - startX), -Math.abs (clip.y - startY));
 161
 162         width = r.width;
 163         height = r.height;
 164         x = r.x;
 165         y = r.y;
 166       }
 167
 168     drawPixels (gc, redBG, greenBG, blueBG,
 169                 startX + x, startY + y,
 170                 width, height, convertPixels (pixels, model), offset,
 171                 scansize, affine);
 172   }
 173
 174   public void
 175   setPixels (int x, int y, int width, int height, ColorModel model,
 176              byte[] pixels, int offset, int scansize)
 177   {
 178     setPixels (x, y, width, height, model, convertPixels (pixels, model),
 179                offset, scansize);
 180   }
 181
 182   public void
 183   setDimensions (int width, int height)
 184   {
 185     if (!flipX && !flipY &&
 186         ((this.width == -1 && this.height == -1)
 187          || (this.width == width && this.height == height)))
 188       return;
 189
 190     affine = new double[6];
 191     affine[1] = affine[2] = affine[4] = affine[5] = 0;
 192
 193     if (clip != null)
 194       {
 195         affine[0] = this.width / (double) s_width;
 196         affine[3] = this.height / (double) s_height;
 197       }
 198     else
 199       {
 200         affine[0] = this.width / (double) width;
 201         affine[3] = this.height / (double) height;
 202       }
 203
 204     if (flipX)
 205       {
 206         affine[0] = -affine[0];
 207         affine[4] = this.width;
 208       }
 209
 210     if (flipY)
 211       {
 212         affine[3] = -affine[3];
 213         affine[5] = this.height;
 214       }
 215
 216     if (affine[0] == 1 && affine[3] == 1)
 217       affine = null;
 218   }
 219
 220   public void
 221   setProperties (Hashtable props)
 222   {
 223   }
 224
 225   public void
 226   setColorModel (ColorModel model)
 227   {
 228   }
 229
 230   public void
 231   setHints (int flags)
 232   {
 233   }
 234
 235   public void
 236   imageComplete (int status)
 237   {
 238   }
 239 }