List of usage examples for java.awt.image PixelGrabber status
public synchronized int status()
From source file:MainClass.java
public void init() { MediaTracker mt = new MediaTracker(this); i = getImage(getDocumentBase(), "ora-icon.gif"); mt.addImage(i, 0);// www . j av a 2 s. co m try { mt.waitForAll(); int width = i.getWidth(this); int height = i.getHeight(this); int pixels[] = new int[width * height]; PixelGrabber pg = new PixelGrabber(i, 0, 0, width, height, pixels, 0, width); if (pg.grabPixels() && ((pg.status() & ImageObserver.ALLBITS) != 0)) { j = createImage( new MemoryImageSource(width, height, rowFlipPixels(pixels, width, height), 0, width)); k = createImage( new MemoryImageSource(width, height, colFlipPixels(pixels, width, height), 0, width)); l = createImage( new MemoryImageSource(height, width, rot90Pixels(pixels, width, height), 0, height)); } } catch (InterruptedException e) { e.printStackTrace(); } }
From source file:GIFEncoder.java
/** * Construct a GIFEncoder. The constructor will convert the image to * an indexed color array. <B>This may take some time.</B><P> * /*w w w . j av a 2 s . c om*/ * @param image The image to encode. The image <B>must</B> be * completely loaded. * @exception AWTException Will be thrown if the pixel grab fails. This * can happen if Java runs out of memory. It may also indicate that the image * contains more than 256 colors. * */ public GIFEncoder(Image image) throws AWTException { width_ = (short) image.getWidth(null); height_ = (short) image.getHeight(null); int values[] = new int[width_ * height_]; PixelGrabber grabber = new PixelGrabber(image, 0, 0, width_, height_, values, 0, width_); try { if (grabber.grabPixels() != true) throw new AWTException("Grabber returned false: " + grabber.status()); } catch (InterruptedException e) { ; } byte r[][] = new byte[width_][height_]; byte g[][] = new byte[width_][height_]; byte b[][] = new byte[width_][height_]; int index = 0; for (int y = 0; y < height_; ++y) for (int x = 0; x < width_; ++x) { r[x][y] = (byte) ((values[index] >> 16) & 0xFF); g[x][y] = (byte) ((values[index] >> 8) & 0xFF); b[x][y] = (byte) ((values[index]) & 0xFF); ++index; } ToIndexedColor(r, g, b); }
From source file:no.geosoft.cc.io.GifEncoder.java
/** * Constructing a GIF encoder.// w w w . ja va2 s. co m * * @param image The image to encode. The image must be * completely loaded. * @throws AWTException If memory is exhausted or image contains * more than 256 colors. */ public GifEncoder(Image image) throws AWTException { imageWidth_ = (short) image.getWidth(null); imageHeight_ = (short) image.getHeight(null); int values[] = new int[imageWidth_ * imageHeight_]; PixelGrabber grabber = new PixelGrabber(image, 0, 0, imageWidth_, imageHeight_, values, 0, imageWidth_); try { if (grabber.grabPixels() != true) throw new AWTException("Grabber returned false: " + grabber.status()); } catch (InterruptedException exception) { } byte[][] r = new byte[imageWidth_][imageHeight_]; byte[][] g = new byte[imageWidth_][imageHeight_]; byte[][] b = new byte[imageWidth_][imageHeight_]; int index = 0; for (int y = 0; y < imageHeight_; y++) { for (int x = 0; x < imageWidth_; x++, index++) { r[x][y] = (byte) ((values[index] >> 16) & 0xFF); g[x][y] = (byte) ((values[index] >> 8) & 0xFF); b[x][y] = (byte) ((values[index] >> 0) & 0xFF); } } toIndexColor(r, g, b); }
From source file:com.greenline.guahao.biz.manager.image.codes.gif.GifEncoder.java
/** * Convenience constructor for class <CODE>GIFEncoder</CODE>. The argument * will be converted to an indexed color array. <B>This may take some * time.</B>//from w w w .j a v a 2s . co m * * @param image The image to encode. The image <B>must</B> be completely * loaded. * @exception AWTException Will be thrown if the pixel grab fails. This can * happen if Java runs out of memory. It may also indicate * that the image contains more than 256 colors. */ public GifEncoder(Image image) throws AWTException { this.imageWidth = (short) image.getWidth(null); this.imageHeight = (short) image.getHeight(null); int values[] = new int[this.imageWidth * this.imageHeight]; PixelGrabber grabber = new PixelGrabber(image, 0, 0, this.imageWidth, this.imageHeight, values, 0, this.imageWidth); try { if (grabber.grabPixels() != true) { log.error("GifEncoder#GifEncoder Grabber returned false: " + grabber.status()); throw new AWTException("Grabber returned false: " + grabber.status()); } } // ends try catch (InterruptedException ie) { log.error("GifEncoder#GifEncoder " + ie.getMessage(), ie); } byte[][] r = new byte[this.imageWidth][this.imageHeight]; byte[][] g = new byte[this.imageWidth][this.imageHeight]; byte[][] b = new byte[this.imageWidth][this.imageHeight]; int index = 0; for (int y = 0; y < this.imageHeight; y++) { for (int x = 0; x < this.imageWidth; x++, index++) { r[x][y] = (byte) ((values[index] >> 16) & 0xFF); g[x][y] = (byte) ((values[index] >> 8) & 0xFF); b[x][y] = (byte) ((values[index]) & 0xFF); } // ends for } // ends for this.toIndexColor(r, g, b); }
From source file:Jpeg.java
private void getYCCArray() { int values[] = new int[imageWidth * imageHeight]; int r, g, b, y, x; // In order to minimize the chance that grabPixels will throw an exception // it may be necessary to grab some pixels every few scanlines and process // those before going for more. The time expense may be prohibitive. // However, for a situation where memory overhead is a concern, this may be // the only choice. PixelGrabber grabber = new PixelGrabber(imageobj.getSource(), 0, 0, imageWidth, imageHeight, values, 0, imageWidth);//from w w w. ja v a2s .c o m MaxHsampFactor = 1; MaxVsampFactor = 1; for (y = 0; y < NumberOfComponents; y++) { MaxHsampFactor = Math.max(MaxHsampFactor, HsampFactor[y]); MaxVsampFactor = Math.max(MaxVsampFactor, VsampFactor[y]); } for (y = 0; y < NumberOfComponents; y++) { compWidth[y] = (((imageWidth % 8 != 0) ? ((int) Math.ceil(imageWidth / 8.0)) * 8 : imageWidth) / MaxHsampFactor) * HsampFactor[y]; if (compWidth[y] != ((imageWidth / MaxHsampFactor) * HsampFactor[y])) { lastColumnIsDummy[y] = true; } // results in a multiple of 8 for compWidth // this will make the rest of the program fail for the unlikely // event that someone tries to compress an 16 x 16 pixel image // which would of course be worse than pointless BlockWidth[y] = (int) Math.ceil(compWidth[y] / 8.0); compHeight[y] = (((imageHeight % 8 != 0) ? ((int) Math.ceil(imageHeight / 8.0)) * 8 : imageHeight) / MaxVsampFactor) * VsampFactor[y]; if (compHeight[y] != ((imageHeight / MaxVsampFactor) * VsampFactor[y])) { lastRowIsDummy[y] = true; } BlockHeight[y] = (int) Math.ceil(compHeight[y] / 8.0); } try { if (grabber.grabPixels() != true) { try { throw new AWTException("Grabber returned false: " + grabber.status()); } catch (Exception e) { } } } catch (InterruptedException e) { } float Y[][] = new float[compHeight[0]][compWidth[0]]; float Cr1[][] = new float[compHeight[0]][compWidth[0]]; float Cb1[][] = new float[compHeight[0]][compWidth[0]]; // float Cb2[][] = new float[compHeight[1]][compWidth[1]]; // float Cr2[][] = new float[compHeight[2]][compWidth[2]]; int index = 0; for (y = 0; y < imageHeight; ++y) { for (x = 0; x < imageWidth; ++x) { r = ((values[index] >> 16) & 0xff); g = ((values[index] >> 8) & 0xff); b = (values[index] & 0xff); // The following three lines are a more correct color conversion but // the current conversion technique is sufficient and results in a // higher // compression rate. // Y[y][x] = 16 + (float)(0.8588*(0.299 * (float)r + 0.587 * (float)g + // 0.114 * (float)b )); // Cb1[y][x] = 128 + (float)(0.8784*(-0.16874 * (float)r - 0.33126 * // (float)g + 0.5 * (float)b)); // Cr1[y][x] = 128 + (float)(0.8784*(0.5 * (float)r - 0.41869 * (float)g // - 0.08131 * (float)b)); Y[y][x] = (float) ((0.299 * r + 0.587 * g + 0.114 * b)); Cb1[y][x] = 128 + (float) ((-0.16874 * r - 0.33126 * g + 0.5 * b)); Cr1[y][x] = 128 + (float) ((0.5 * r - 0.41869 * g - 0.08131 * b)); index++; } } // Need a way to set the H and V sample factors before allowing // downsampling. // For now (04/04/98) downsampling must be hard coded. // Until a better downsampler is implemented, this will not be done. // Downsampling is currently supported. The downsampling method here // is a simple box filter. Components[0] = Y; // Cb2 = DownSample(Cb1, 1); Components[1] = Cb1; // Cr2 = DownSample(Cr1, 2); Components[2] = Cr1; }