public Iterator handlePixels(Image img, Rectangle rect) {
int x = rect.x;
int y = rect.y;
int w = rect.width;
int h = rect.height;
int[] pixels = new int[w * h];
PixelGrabber pg = new PixelGrabber(img, x, y, w, h, pixels, 0, w);
try {
pg.grabPixels();
} catch (InterruptedException e) {
System.err.println("interrupted waiting for pixels!");
return null;
}
if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
System.err.println("image fetch aborted or errored");
return null;
}
ArrayList tmpList = new ArrayList();
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
tmpList.add(handleSinglePixel(x + i, y + j, pixels[j * w + i]));
}
}
return tmpList.iterator();
}
/**
* Construct a GIFEncoder. The constructor will convert the image to an indexed color array.
* <B>This may take some time.</B>
*
* <p>
*
* @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);
}
/**
* Return the Image pixels in default Java int ARGB format.
*
* @return
*/
public static int[] getImagePixels(Image image) {
int[] pixelsARGB = null;
if (image != null) {
int imgw = image.getWidth(null);
int imgh = image.getHeight(null);
pixelsARGB = new int[imgw * imgh];
PixelGrabber pg = new PixelGrabber(image, 0, 0, imgw, imgh, pixelsARGB, 0, imgw);
try {
pg.grabPixels();
} catch (Exception e) {
GLApp.err("Pixel Grabbing interrupted!");
return null;
}
}
return pixelsARGB;
}
private void grabPixels(PixelGrabber grabber) {
try {
grabber.grabPixels();
} catch (InterruptedException e) {
e.printStackTrace();
}
// if (grabber.getColorModel() != ColorModel.getRGBdefault()) {
// System.err.println("Warning: found other colormodel than default.");
// }
}
// This method returns true if the specified image has transparent pixels
// Source: http://www.exampledepot.com/egs/java.awt.image/HasAlpha.html
public static boolean hasAlpha(Image image) {
// If buffered image, the color model is readily available
if (image instanceof BufferedImage) {
BufferedImage bimage = (BufferedImage) image;
return bimage.getColorModel().hasAlpha();
}
// Use a pixel grabber to retrieve the image's color model;
// grabbing a single pixel is usually sufficient
PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
try {
pg.grabPixels();
} catch (InterruptedException e) {
}
// Get the image's color model
ColorModel cm = pg.getColorModel();
return cm.hasAlpha();
}
private void createImage2() {
java.awt.Image img2 = createImage(height, width);
Graphics g = img2.getGraphics();
g.setColor(Color.lightGray);
g.fillRect(0, 0, height, width);
g.setColor(Color.black);
FontMetrics fm = g.getFontMetrics();
String str = "Work Unit keyrate (kkeys/sec)";
int length = fm.stringWidth(str);
g.drawString(str, (height / 2) - length / 2, fm.getHeight());
g.dispose();
g.finalize();
img2.flush();
int[] pixels = new int[height * width];
PixelGrabber pg = new PixelGrabber(img2, 0, 0, height, width, pixels, 0, height);
try {
pg.grabPixels();
} catch (InterruptedException e) {
System.err.println("interrupted waiting for pixels!");
return;
}
/* Rotate the Image */
int pixels2[] = new int[height * width];
for (int x = 0; x < width; x++)
for (int y = 0; y < height; y++) {
int c = pixels[y + (x) * height];
// Due a bug in the MS-JavaVM the Background for Images are not the same
// as for Panel's so. mark it as non-opaque ..
if (c != 0xff000000) {
c = 0;
}
pixels2[x + (height - y - 1) * width] = c;
}
img = createImage(new MemoryImageSource(width, height, pixels2, 0, width));
repaint();
}
public getPicInfo(Frame father) {
try {
FileDialog diag = new FileDialog(father);
diag.setVisible(true);
m_Img =
getToolkit()
.getImage(diag.getDirectory() + diag.getFile())
.getScaledInstance(W, H, Image.SCALE_SMOOTH);
MediaTracker mt = new MediaTracker(this);
mt.addImage(m_Img, 0);
mt.waitForAll();
PixelGrabber grab = new PixelGrabber(m_Img, 0, 0, W, H, m_Pix, 0, W);
grab.grabPixels();
m_ImgSrc = new MemoryImageSource(W, H, m_Pix, 0, W);
m_Img = createImage(m_ImgSrc);
System.out.println("Wait HERE !");
} catch (InterruptedException e) {
}
}
public void init() {
MediaTracker mt = new MediaTracker(this);
URL url = getClass().getResource("tiger.gif");
try {
image = createImage((ImageProducer) url.getContent());
mt.addImage(image, 0);
mt.waitForID(0);
} catch (Exception e) {
e.printStackTrace();
}
imw = image.getWidth(this);
imh = image.getWidth(this);
pixels = new int[imw * imh];
try {
PixelGrabber pg = new PixelGrabber(image, 0, 0, imw, imh, pixels, 0, imw);
pg.grabPixels();
} catch (InterruptedException e) {
e.printStackTrace();
}
addMouseMotionListener(
new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
int mx = e.getX(), my = e.getY();
if (mx > 0 && mx < imw && my > 0 && my < imh) {
int pixel = ((int[]) pixels)[my * imw + mx];
int red = defaultRGB.getRed(pixel),
green = defaultRGB.getGreen(pixel),
blue = defaultRGB.getBlue(pixel),
alpha = defaultRGB.getAlpha(pixel);
showStatus("red=" + red + " green=" + green + " blue=" + blue + " alpha=" + alpha);
}
}
});
}
private static int[] makeGradientPallet() {
BufferedImage image = new BufferedImage(100, 1, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
Point2D start = new Point2D.Float(0f, 0f);
Point2D end = new Point2D.Float(99f, 0f);
float[] dist = {0f, .5f, 1f};
Color[] colors = {Color.RED, Color.YELLOW, Color.GREEN};
g2.setPaint(new LinearGradientPaint(start, end, dist, colors));
g2.fillRect(0, 0, 100, 1);
g2.dispose();
int width = image.getWidth(null);
int[] pallet = new int[width];
PixelGrabber pg = new PixelGrabber(image, 0, 0, width, 1, pallet, 0, width);
try {
pg.grabPixels();
} catch (InterruptedException ex) {
ex.printStackTrace();
}
return pallet;
}
/** *************** Grab Pixels and Convert to gray scale ************** */
int[] pixel_grab(Image img, int width, int height) {
int pixSrc[] = new int[w * h];
try {
PixelGrabber pg = new PixelGrabber(img, 0, 0, w, h, pixSrc, 0, w);
pg.grabPixels();
} catch (Exception e) {
System.out.println("Exception at Pixel Grabbing");
}
for (int i = 0; i < w * h; i++) // Convertion of pixle form to normal single Value...
{
int a = pixSrc[i];
int r = (0xff & (a >> 16));
int g = (0xff & (a >> 8));
int b = (0xff & a);
int avg = (int) ((.33 * r + .56 * g + .11 * b)); // Add a constant to each pixel
pixSrc[i] = avg;
}
return (pixSrc);
}
/**
* PS see http://astronomy.swin.edu.au/~pbourke/geomformats/postscript/ Java
* http://show.docjava.com:8086/book/cgij/doc/ip/graphics/SimpleImageFrame.java.html
*/
public boolean drawImage(
Image img, int x, int y, int width, int height, Color bgcolor, ImageObserver observer) {
try {
// get data from image
int[] pixels = new int[width * height];
PixelGrabber grabber = new PixelGrabber(img, 0, 0, width, height, pixels, 0, width);
grabber.grabPixels();
ColorModel model = ColorModel.getRGBdefault();
// print data to ps
m_printstream.println("gsave");
m_printstream.println(
xTransform(xScale(x)) + " " + (yTransform(yScale(y)) - yScale(height)) + " translate");
m_printstream.println(xScale(width) + " " + yScale(height) + " scale");
m_printstream.println(
width + " " + height + " " + "8" + " [" + width + " 0 0 " + (-height) + " 0 " + height
+ "]");
m_printstream.println("{<");
int index;
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
index = i * width + j;
m_printstream.print(toHex(model.getRed(pixels[index])));
m_printstream.print(toHex(model.getGreen(pixels[index])));
m_printstream.print(toHex(model.getBlue(pixels[index])));
}
m_printstream.println();
}
m_printstream.println(">}");
m_printstream.println("false 3 colorimage");
m_printstream.println("grestore");
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** Convert standard img to a buffered image. */
public static BufferedImage convertImage(Image img) {
int height = img.getHeight(null), width = img.getWidth(null);
// FloatMatrix fm = new FloatMatrix( height, width ) ;
PixelGrabber grabber = new PixelGrabber(img, 0, 0, width, height, false);
try {
grabber.grabPixels();
} catch (InterruptedException e) {
System.out.println(e);
}
Object pixels = grabber.getPixels();
ColorModel cm = grabber.getColorModel();
BufferedImage bimg = null;
// REVISIT Makes some unwarranted assumptions about the layout of the PixelGrabber data
// as being either int (ARGB?) or byte (gray scale?)
if (pixels instanceof int[]) {
int[] arr = (int[]) pixels;
byte[] barray = new byte[arr.length * 3];
int k = 0;
for (int j = 0; j < arr.length; j++) {
int l = arr[j];
barray[k++] = (byte) (l & 0xFF);
barray[k++] = (byte) ((l >>> 8) & 0xFF);
barray[k++] = (byte) ((l >>> 16) & 0xFF);
}
ColorModel ccm =
new ComponentColorModel(
ICC_ColorSpace.getInstance(ICC_ColorSpace.CS_sRGB),
new int[] {8, 8, 8},
false,
false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
DataBuffer bbuf = new DataBufferByte(barray, barray.length);
SampleModel bmodel =
new PixelInterleavedSampleModel(
DataBuffer.TYPE_BYTE, width, height, 3, 3 * width, new int[] {2, 1, 0});
WritableRaster raster = Raster.createWritableRaster(bmodel, bbuf, new Point(0, 0));
bimg = new BufferedImage(ccm, raster, false, new Hashtable());
} else if (pixels instanceof byte[]) { // Assume gray scale model?
byte[] arr = (byte[]) pixels;
byte[] barray = new byte[arr.length * 3];
int k = 0;
for (int j = 0; j < arr.length; j++) {
byte l = arr[j];
barray[k++] = l;
barray[k++] = l;
barray[k++] = l;
}
ColorModel ccm =
new ComponentColorModel(
ICC_ColorSpace.getInstance(ICC_ColorSpace.CS_sRGB),
new int[] {8, 8, 8},
false,
false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE);
DataBuffer bbuf = new DataBufferByte(barray, barray.length);
SampleModel bmodel =
new PixelInterleavedSampleModel(
DataBuffer.TYPE_BYTE, width, height, 3, 3 * width, new int[] {2, 1, 0});
WritableRaster raster = Raster.createWritableRaster(bmodel, bbuf, new Point(0, 0));
bimg = new BufferedImage(ccm, raster, false, new Hashtable());
} else {
throw new RuntimeException("Unexpected data.");
}
return bimg;
}
/*
* This method creates and fills three arrays, Y, Cb, and Cr using the
* input image.
*/
private void getYCCArray() {
int[] values = new int[imageWidth * imageHeight];
int r;
int g;
int b;
int y;
int 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);
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((double) 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((double) compWidth[y] / 8.0);
compHeight[y] =
((((imageHeight % 8) != 0)
? (((int) Math.ceil((double) imageHeight / 8.0)) * 8)
: imageHeight)
/ MaxVsampFactor)
* VsampFactor[y];
if (compHeight[y] != ((imageHeight / MaxVsampFactor) * VsampFactor[y])) {
lastRowIsDummy[y] = true;
}
BlockHeight[y] = (int) Math.ceil((double) compHeight[y] / 8.0);
}
try {
if (grabber.grabPixels() != true) {
try {
throw new AWTException("Grabber returned false: " + grabber.status());
} catch (Exception e) {
String2.log(MustBe.throwableToString(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 * (float) r) + (0.587 * (float) g) + (0.114 * (float) b)));
Cb1[y][x] =
128 + (float) (((-0.16874 * (float) r) - (0.33126 * (float) g) + (0.5 * (float) b)));
Cr1[y][x] =
128 + (float) (((0.5 * (float) r) - (0.41869 * (float) g) - (0.08131 * (float) 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;
}
