Esempio n. 1
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 /**
  * Create possibly volatile scratch image for fast painting. A scratch image can become
  * invalidated, when this happens any actions involving it are ignored, and it needs to be
  * recreated. Use isScratchImageValid() to check this.
  */
 public static Image createScratchImage(int width, int height) {
   try {
     Image img =
         (Image)
             tryMethod(
                 output_comp,
                 "createVolatileImage",
                 new Object[] {new Integer(width), new Integer(height)});
     if (img == null) {
       // no such method -> create regular image
       return output_comp.createImage(width, height);
     }
     // if (img.validate(output_comp.getGraphicsConfiguration())
     // == VolatileImage.IMAGE_INCOMPATIBLE) {
     GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
     GraphicsDevice gs = ge.getDefaultScreenDevice();
     GraphicsConfiguration gc = gs.getDefaultConfiguration();
     Integer valid = (Integer) tryMethod(img, "validate", new Object[] {gc});
     // output_comp.getGraphicsConfiguration() });
     if (valid.intValue() == 2) { // I checked, IMAGE_INCOMPATIBLE=2
       // Hmm, somehow it didn't work. Create regular image.
       return output_comp.createImage(width, height);
     }
     return img;
   } catch (java.security.AccessControlException e) {
     // we're not allowed to do this (we're probably an applet)
     return output_comp.createImage(width, height);
   }
 }
Esempio n. 2
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 public JGImage flip(boolean horiz, boolean vert) {
   @SuppressWarnings("unused")
   Image flipped = null;
   JGPoint size = getSize();
   int[] buffer = getPixels();
   int[] flipbuf = new int[size.x * size.y];
   if (vert && !horiz) {
     for (int y = 0; y < size.y; y++) {
       for (int x = 0; x < size.x; x++) {
         flipbuf[(size.y - y - 1) * size.x + x] = buffer[(y * size.x) + x];
       }
     }
   } else if (horiz && !vert) {
     for (int y = 0; y < size.y; y++) {
       for (int x = 0; x < size.x; x++) {
         flipbuf[y * size.x + (size.x - x - 1)] = buffer[(y * size.x) + x];
       }
     }
   } else if (horiz && vert) {
     for (int y = 0; y < size.y; y++) {
       for (int x = 0; x < size.x; x++) {
         flipbuf[(size.y - y - 1) * size.x + (size.x - x - 1)] = buffer[(y * size.x) + x];
       }
     }
   }
   return new JREImage(
       output_comp.createImage(new MemoryImageSource(size.x, size.y, flipbuf, 0, size.x)));
 }
Esempio n. 3
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 public JGImage crop(int x, int y, int width, int height) {
   @SuppressWarnings("unused")
   JGPoint size = getSize();
   int[] buffer = getPixels(x, y, width, height);
   return new JREImage(
       output_comp.createImage(new MemoryImageSource(width, height, buffer, 0, width)));
 }
Esempio n. 4
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 /** for angle, only increments of 90 are allowed */
 public JGImage rotate(int angle) {
   @SuppressWarnings("unused")
   Image rot = null;
   JGPoint size = getSize();
   int[] buffer = getPixels();
   int[] rotate = new int[size.x * size.y];
   int angletype = (angle / 90) & 3;
   if (angletype == 0) return this;
   if (angletype == 1) {
     /* 1 2 3 4    9 5 1
      * 5 6 7 8 => a 6 2
      * 9 a b c    b 7 3
      *            c 8 4 */
     for (int y = 0; y < size.y; y++) {
       for (int x = 0; x < size.x; x++) {
         rotate[x * size.y + (size.y - 1 - y)] = buffer[(y * size.x) + x];
       }
     }
     return new JREImage(
         output_comp.createImage(new MemoryImageSource(size.y, size.x, rotate, 0, size.y)));
   }
   if (angletype == 3) {
     /* 1 2 3 4    4 8 c
      * 5 6 7 8 => 3 7 b
      * 9 a b c    2 6 a
      *            1 5 9 */
     for (int y = 0; y < size.y; y++) {
       for (int x = 0; x < size.x; x++) {
         rotate[(size.x - x - 1) * size.y + y] = buffer[(y * size.x) + x];
       }
     }
     return new JREImage(
         output_comp.createImage(new MemoryImageSource(size.y, size.x, rotate, 0, size.y)));
   }
   if (angletype == 2) {
     /* 1 2 3 4    c b a 9
      * 5 6 7 8 => 8 7 6 5
      * 9 a b c    4 3 2 1 */
     for (int y = 0; y < size.y; y++) {
       for (int x = 0; x < size.x; x++) {
         rotate[((size.y - y - 1) * size.x) + (size.x - x - 1)] = buffer[(y * size.x) + x];
       }
     }
   }
   return new JREImage(
       output_comp.createImage(new MemoryImageSource(size.x, size.y, rotate, 0, size.x)));
 }
Esempio n. 5
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 /**
  * Turn a (possibly) translucent or indexed image into a display-compatible bitmask image using
  * the given alpha threshold and render-to-background colour, or display-compatible translucent
  * image. The alpha values in the image are set to either 0 (below threshold) or 255 (above
  * threshold). The render-to-background colour bg_col is used to determine how the pixels
  * overlapping transparent pixels should be rendered. The fast algorithm just sets the colour
  * behind the transparent pixels in the image (for bitmask source images); the slow algorithm
  * actually renders the image to a background of bg_col (for translucent sources).
  *
  * @param thresh alpha threshold between 0 and 255
  * @param fast use fast algorithm (only set bg_col behind transp. pixels)
  * @param bitmask true=use bitmask, false=use translucent
  */
 public JGImage toDisplayCompatible(int thresh, JGColor bg_col, boolean fast, boolean bitmask) {
   Color bgcol = new Color(bg_col.r, bg_col.g, bg_col.b);
   int bgcol_rgb = (bgcol.getRed() << 16) | (bgcol.getGreen() << 8) | bgcol.getBlue();
   JGPoint size = getSize();
   int[] buffer = getPixels();
   // render image to bg depending on bgcol
   BufferedImage img_bg;
   if (bitmask) {
     img_bg = createCompatibleImage(size.x, size.y, Transparency.BITMASK);
   } else {
     img_bg = createCompatibleImage(size.x, size.y, Transparency.TRANSLUCENT);
   }
   int[] bg_buf;
   if (!fast) {
     Graphics g = img_bg.getGraphics();
     g.setColor(bgcol);
     // the docs say I could use bgcol in the drawImage as an
     // equivalent to the following two lines, but this
     // doesn't handle translucency properly and is _slower_
     g.fillRect(0, 0, size.x, size.y);
     g.drawImage(img, 0, 0, null);
     bg_buf = new JREImage(img_bg).getPixels();
   } else {
     bg_buf = buffer;
   }
   // g.dispose();
   // ColorModel rgb_bitmask = ColorModel.getRGBdefault();
   // rgb_bitmask = new PackedColorModel(
   //		rgb_bitmask.getColorSpace(),25,0xff0000,0x00ff00,0x0000ff,
   //		0x1000000, false, Transparency.BITMASK, DataBuffer.TYPE_INT);
   //		ColorSpace space, int bits, int rmask, int gmask, int bmask, int amask, boolean
   // isAlphaPremultiplied, int trans, int transferType)
   int[] thrsbuf = new int[size.x * size.y];
   for (int y = 0; y < size.y; y++) {
     for (int x = 0; x < size.x; x++) {
       if (((buffer[y * size.x + x] >> 24) & 0xff) >= thresh) {
         thrsbuf[y * size.x + x] = bg_buf[y * size.x + x] | (0xff << 24);
       } else {
         // explicitly set the colour of the transparent pixel.
         // This makes a difference when scaling!
         // thrsbuf[y*size.x+x]=bg_buf[y*size.x+x]&~(0xff<<24);
         thrsbuf[y * size.x + x] = bgcol_rgb;
       }
     }
   }
   return new JREImage(
       output_comp.createImage(
           new MemoryImageSource(
               size.x,
               size.y,
               // rgb_bitmask,
               img_bg.getColorModel(), // display compatible bitmask
               bitmask ? thrsbuf : bg_buf,
               0,
               size.x)));
 }