package testejavadesktop;
import java.awt.*;
import java.awt.image.*;
import java.io.FileInputStream;
import javax.swing.ImageIcon;
public class ImageProcessor extends java.applet.Applet {
/**
loadbitmap() method converted from Windows C code.
Reads only uncompressed 24- and 8-bit images. Tested with
images saved using Microsoft Paint in Windows 95. If the image
is not a 24- or 8-bit image, the program refuses to even try.
I guess one could include 4-bit images by masking the byte
by first 1100 and then 0011. I am not really
interested in such images. If a compressed image is attempted,
the routine will probably fail by generating an IOException.
Look for variable ncompression to be different from 0 to indicate
compression is present.
Arguments:
sdir and sfile are the result of the FileDialog()
getDirectory() and getFile() methods.
Returns:
Image Object, be sure to check for (Image)null !!!!
*/
public Image loadbitmap(String str_file) {
Image image;
//System.out.println("loading:" + str_file);
try {
FileInputStream fs = new FileInputStream(str_file);
int bflen = 14; // 14 byte BITMAPFILEHEADER
byte bf[] = new byte[bflen];
fs.read(bf, 0, bflen);
int bilen = 40; // 40-byte BITMAPINFOHEADER
byte bi[] = new byte[bilen];
fs.read(bi, 0, bilen);
// Interperet data.
int nsize = (((int) bf[5] & 0xff) << 24) | (((int) bf[4] & 0xff) << 16) | (((int) bf[3] & 0xff) << 8) | (int) bf[2] & 0xff;
//System.out.println("File type is :" + (char) bf[0] + (char) bf[1]);
//System.out.println("Size of file is :" + nsize);
int nbisize = (((int) bi[3] & 0xff) << 24) | (((int) bi[2] & 0xff) << 16) | (((int) bi[1] & 0xff) << 8) | (int) bi[0] & 0xff;
//System.out.println("Size of bitmapinfoheader is :" + nbisize);
int nwidth = (((int) bi[7] & 0xff) << 24) | (((int) bi[6] & 0xff) << 16) | (((int) bi[5] & 0xff) << 8) | (int) bi[4] & 0xff;
//System.out.println("Width is :" + nwidth);
int nheight = (((int) bi[11] & 0xff) << 24) | (((int) bi[10] & 0xff) << 16) | (((int) bi[9] & 0xff) << 8) | (int) bi[8] & 0xff;
//System.out.println("Height is :" + nheight);
int nplanes = (((int) bi[13] & 0xff) << 8) | (int) bi[12] & 0xff;
//System.out.println("Planes is :" + nplanes);
int nbitcount = (((int) bi[15] & 0xff) << 8) | (int) bi[14] & 0xff;
//System.out.println("BitCount is :" + nbitcount);
// Look for non-zero values to indicate compression
int ncompression = (((int) bi[19]) << 24) | (((int) bi[18]) << 16) | (((int) bi[17]) << 8) | (int) bi[16];
//System.out.println("Compression is :" + ncompression);
int nsizeimage = (((int) bi[23] & 0xff) << 24) | (((int) bi[22] & 0xff) << 16) | (((int) bi[21] & 0xff) << 8) | (int) bi[20] & 0xff;
//System.out.println("SizeImage is :" + nsizeimage);
int nxpm = (((int) bi[27] & 0xff) << 24) | (((int) bi[26] & 0xff) << 16) | (((int) bi[25] & 0xff) << 8) | (int) bi[24] & 0xff;
//System.out.println("X-Pixels per meter is :" + nxpm);
int nypm = (((int) bi[31] & 0xff) << 24) | (((int) bi[30] & 0xff) << 16) | (((int) bi[29] & 0xff) << 8) | (int) bi[28] & 0xff;
//System.out.println("Y-Pixels per meter is :" + nypm);
int nclrused = (((int) bi[35] & 0xff) << 24) | (((int) bi[34] & 0xff) << 16) | (((int) bi[33] & 0xff) << 8) | (int) bi[32] & 0xff;
//System.out.println("Colors used are :" + nclrused);
int nclrimp = (((int) bi[39] & 0xff) << 24) | (((int) bi[38] & 0xff) << 16) | (((int) bi[37] & 0xff) << 8) | (int) bi[36] & 0xff;
//System.out.println("Colors important are :" + nclrimp);
if (nbitcount == 24) {
// No Palatte data for 24-bit format but scan lines are
// padded out to even 4-byte boundaries.
int npad = (nsizeimage / nheight) - nwidth * 3;
int ndata[] = new int[nheight * nwidth];
byte brgb[] = new byte[(nwidth + npad) * 3 * nheight];
fs.read(brgb, 0, (nwidth + npad) * 3 * nheight);
int nindex = 0;
for (int j = 0; j < nheight; j++) {
for (int i = 0; i < nwidth; i++) {
ndata[nwidth * (nheight - j - 1) + i] =
(255 & 0xff) << 24 | (((int) brgb[nindex + 2] & 0xff) << 16) | (((int) brgb[nindex + 1] & 0xff) << 8) | (int) brgb[nindex] & 0xff;
nindex += 3;
}
nindex += npad;
}
image = createImage(new MemoryImageSource(nwidth, nheight, ndata, 0, nwidth));
} else if (nbitcount == 8) {
// Have to determine the number of colors, the clrsused
// parameter is dominant if it is greater than zero. If
// zero, calculate colors based on bitsperpixel.
int nNumColors = 0;
if (nclrused > 0) {
nNumColors = nclrused;
} else {
nNumColors = (1 & 0xff) << nbitcount;
}
//System.out.println("The number of Colors is" + nNumColors);
// Some bitmaps do not have the sizeimage field calculated
// Ferret out these cases and fix 'em.
if (nsizeimage == 0) {
nsizeimage = ((((nwidth * nbitcount) + 31) & 31) >> 3);
nsizeimage *= nheight;
//System.out.println("nsizeimage (backup) is" + nsizeimage);
}
// Read the palatte colors.
int npalette[] = new int[nNumColors];
byte bpalette[] = new byte[nNumColors * 4];
fs.read(bpalette, 0, nNumColors * 4);
int nindex8 = 0;
for (int n = 0; n < nNumColors; n++) {
npalette[n] = (255 & 0xff) << 24 | (((int) bpalette[nindex8 + 2] & 0xff) << 16) | (((int) bpalette[nindex8 + 1] & 0xff) << 8) | (int) bpalette[nindex8] & 0xff;
nindex8 += 4;
}
// Read the image data (actually indices into the palette)
// Scan lines are still padded out to even 4-byte
// boundaries.
int npad8 = (nsizeimage / nheight) - nwidth;
//System.out.println("nPad is:" + npad8);
int ndata8[] = new int[nwidth * nheight];
byte bdata[] = new byte[(nwidth + npad8) * nheight];
fs.read(bdata, 0, (nwidth + npad8) * nheight);
nindex8 = 0;
for (int j8 = 0; j8 < nheight; j8++) {
for (int i8 = 0; i8 < nwidth; i8++) {
ndata8[nwidth * (nheight - j8 - 1) + i8] =
npalette[((int) bdata[nindex8] & 0xff)];
nindex8++;
}
nindex8 += npad8;
}
image = createImage(new MemoryImageSource(nwidth, nheight, ndata8, 0, nwidth));
} else {
//System.out.println("Not a 24-bit or 8-bit Windows Bitmap, aborting...");
image = (Image) null;
}
fs.close();
return image;
} catch (Exception e) {
//System.out.println("Caught exception in loadbitmap!");
}
return (Image) null;
}
// This method returns a buffered image with the contents of an image
public static BufferedImage toBufferedImage(Image image) {
if (image instanceof BufferedImage) {
return (BufferedImage) image;
}
// This code ensures that all the pixels in the image are loaded
image = new ImageIcon(image).getImage();
// Determine if the image has transparent pixels; for this method's
// implementation, see e661 Determining If an Image Has Transparent Pixels
boolean hasAlpha = false;//hasAlpha(image);
// Create a buffered image with a format that's compatible with the screen
BufferedImage bimage = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
try {
// Determine the type of transparency of the new buffered image
int transparency = Transparency.OPAQUE;
if (hasAlpha) {
transparency = Transparency.BITMASK;
}
// Create the buffered image
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
bimage = gc.createCompatibleImage(
image.getWidth(null), image.getHeight(null), transparency);
} catch (HeadlessException e) {
// The system does not have a screen
}
if (bimage == null) {
// Create a buffered image using the default color model
int type = BufferedImage.TYPE_INT_RGB;
if (hasAlpha) {
type = BufferedImage.TYPE_INT_ARGB;
}
bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
}
// Copy image to buffered image
Graphics g = bimage.createGraphics();
// Paint the image onto the buffered image
g.drawImage(image, 0, 0, null);
g.dispose();
return bimage;
}
//---------------------------------------------------------------------------
}