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Diffstat (limited to 'src/classes/com/sun/opengl/utils/SGIImage.java')
| -rwxr-xr-x | src/classes/com/sun/opengl/utils/SGIImage.java | 671 |
1 files changed, 0 insertions, 671 deletions
diff --git a/src/classes/com/sun/opengl/utils/SGIImage.java b/src/classes/com/sun/opengl/utils/SGIImage.java deleted file mode 100755 index f06c10b56..000000000 --- a/src/classes/com/sun/opengl/utils/SGIImage.java +++ /dev/null @@ -1,671 +0,0 @@ -/* - * Portions Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * - Redistribution of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * - Redistribution in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * Neither the name of Sun Microsystems, Inc. or the names of - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * This software is provided "AS IS," without a warranty of any kind. ALL - * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, - * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A - * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN - * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR - * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR - * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR - * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR - * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE - * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, - * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF - * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. - * - * You acknowledge that this software is not designed or intended for use - * in the design, construction, operation or maintenance of any nuclear - * facility. - * - * Sun gratefully acknowledges that this software was originally authored - * and developed by Kenneth Bradley Russell and Christopher John Kline. - */ - -package com.sun.opengl.utils; - -import java.io.*; -import javax.media.opengl.*; -import com.sun.opengl.utils.*; - -// Test harness -import java.awt.image.*; -import javax.swing.*; - -/** <p> Reads and writes SGI RGB/RGBA images. </p> - - <p> Written from <a href = - "http://astronomy.swin.edu.au/~pbourke/dataformats/sgirgb/">Paul - Bourke's adaptation</a> of the <a href = - "http://astronomy.swin.edu.au/~pbourke/dataformats/sgirgb/sgiversion.html">SGI - specification</a>. </p> -*/ - -public class SGIImage { - private Header header; - private int format; - private byte[] data; - // Used for decoding RLE-compressed images - private int[] rowStart; - private int[] rowSize; - private int rleEnd; - private byte[] tmpData; - private byte[] tmpRead; - - private static final int MAGIC = 474; - - static class Header { - short magic; // IRIS image file magic number - // This should be decimal 474 - byte storage; // Storage format - // 0 for uncompressed - // 1 for RLE compression - byte bpc; // Number of bytes per pixel channel - // Legally 1 or 2 - short dimension; // Number of dimensions - // Legally 1, 2, or 3 - // 1 means a single row, XSIZE long - // 2 means a single 2D image - // 3 means multiple 2D images - short xsize; // X size in pixels - short ysize; // Y size in pixels - short zsize; // Number of channels - // 1 indicates greyscale - // 3 indicates RGB - // 4 indicates RGB and Alpha - int pixmin; // Minimum pixel value - // This is the lowest pixel value in the image - int pixmax; // Maximum pixel value - // This is the highest pixel value in the image - int dummy; // Ignored - // Normally set to 0 - String imagename; // Image name; 80 bytes long - // Must be null terminated, therefore at most 79 bytes - int colormap; // Colormap ID - // 0 - normal mode - // 1 - dithered, 3 mits for red and green, 2 for blue, obsolete - // 2 - index colour, obsolete - // 3 - not an image but a colourmap - // 404 bytes char DUMMY Ignored - // Should be set to 0, makes the header 512 bytes. - - Header() { - magic = MAGIC; - } - - Header(DataInputStream in) throws IOException { - magic = in.readShort(); - storage = in.readByte(); - bpc = in.readByte(); - dimension = in.readShort(); - xsize = in.readShort(); - ysize = in.readShort(); - zsize = in.readShort(); - pixmin = in.readInt(); - pixmax = in.readInt(); - dummy = in.readInt(); - byte[] tmpname = new byte[80]; - in.read(tmpname); - int numChars = 0; - while (tmpname[numChars++] != 0); - imagename = new String(tmpname, 0, numChars); - colormap = in.readInt(); - byte[] tmp = new byte[404]; - in.read(tmp); - } - - public String toString() { - return ("magic: " + magic + - " storage: " + (int) storage + - " bpc: " + (int) bpc + - " dimension: " + dimension + - " xsize: " + xsize + - " ysize: " + ysize + - " zsize: " + zsize + - " pixmin: " + pixmin + - " pixmax: " + pixmax + - " imagename: " + imagename + - " colormap: " + colormap); - } - } - - private SGIImage(Header header) { - this.header = header; - } - - /** Reads an SGI image from the specified file. */ - public static SGIImage read(String filename) throws IOException { - return read(new FileInputStream(filename)); - } - - /** Reads an SGI image from the specified InputStream. */ - public static SGIImage read(InputStream in) throws IOException { - DataInputStream dIn = new DataInputStream(new BufferedInputStream(in)); - - Header header = new Header(dIn); - SGIImage res = new SGIImage(header); - res.decodeImage(dIn); - return res; - } - - /** Writes this SGIImage to the specified file name. If - flipVertically is set, outputs the scanlines from top to bottom - rather than the default bottom to top order. */ - public void write(String filename, boolean flipVertically) throws IOException { - write(new File(filename), flipVertically); - } - - /** Writes this SGIImage to the specified file. If flipVertically is - set, outputs the scanlines from top to bottom rather than the - default bottom to top order. */ - public void write(File file, boolean flipVertically) throws IOException { - writeImage(file, data, header.xsize, header.ysize, header.zsize, flipVertically); - } - - /** Creates an SGIImage from the specified data in either RGB or - RGBA format. */ - public static SGIImage createFromData(int width, - int height, - boolean hasAlpha, - byte[] data) { - Header header = new Header(); - header.xsize = (short) width; - header.ysize = (short) height; - header.zsize = (short) (hasAlpha ? 4 : 3); - SGIImage image = new SGIImage(header); - image.data = data; - return image; - } - - /** Determines from the magic number whether the given InputStream - points to an SGI RGB image. The given InputStream must return - true from markSupported() and support a minimum of two bytes - of read-ahead. */ - public static boolean isSGIImage(InputStream in) throws IOException { - if (!(in instanceof BufferedInputStream)) { - in = new BufferedInputStream(in); - } - if (!in.markSupported()) { - throw new IOException("Can not test non-destructively whether given InputStream is an SGI RGB image"); - } - DataInputStream dIn = new DataInputStream(in); - dIn.mark(4); - short magic = dIn.readShort(); - dIn.reset(); - return (magic == MAGIC); - } - - /** Returns the width of the image. */ - public int getWidth() { - return header.xsize; - } - - /** Returns the height of the image. */ - public int getHeight() { - return header.ysize; - } - - /** Returns the OpenGL format for this texture; e.g. GL.GL_RGB or GL.GL_RGBA. */ - public int getFormat() { - return format; - } - - /** Returns the raw data for this texture in the correct - (bottom-to-top) order for calls to glTexImage2D. */ - public byte[] getData() { return data; } - - public String toString() { - return header.toString(); - } - - //---------------------------------------------------------------------- - // Internals only below this point - // - - private void decodeImage(DataInputStream in) throws IOException { - if (header.storage == 1) { - // Read RLE compression data; row starts and sizes - int x = header.ysize * header.zsize; - rowStart = new int[x]; - rowSize = new int[x]; - rleEnd = 4 * 2 * x + 512; - for (int i = 0; i < x; i++) { - rowStart[i] = in.readInt(); - } - for (int i = 0; i < x; i++) { - rowSize[i] = in.readInt(); - } - tmpRead = new byte[header.xsize * 256]; - } - tmpData = readAll(in); - - int xsize = header.xsize; - int ysize = header.ysize; - int zsize = header.zsize; - int lptr = 0; - - data = new byte[xsize * ysize * 4]; - byte[] rbuf = new byte[xsize]; - byte[] gbuf = new byte[xsize]; - byte[] bbuf = new byte[xsize]; - byte[] abuf = new byte[xsize]; - for (int y = 0; y < ysize; y++) { - if (zsize >= 4) { - getRow(rbuf, y, 0); - getRow(gbuf, y, 1); - getRow(bbuf, y, 2); - getRow(abuf, y, 3); - rgbatorgba(rbuf, gbuf, bbuf, abuf, data, lptr); - } else if (zsize == 3) { - getRow(rbuf, y, 0); - getRow(gbuf, y, 1); - getRow(bbuf, y, 2); - rgbtorgba(rbuf, gbuf, bbuf, data, lptr); - } else if (zsize == 2) { - getRow(rbuf, y, 0); - getRow(abuf, y, 1); - latorgba(rbuf, abuf, data, lptr); - } else { - getRow(rbuf, y, 0); - bwtorgba(rbuf, data, lptr); - } - lptr += 4 * xsize; - } - rowStart = null; - rowSize = null; - tmpData = null; - tmpRead = null; - format = GL.GL_RGBA; - header.zsize = 4; - } - - private void getRow(byte[] buf, int y, int z) { - if (header.storage == 1) { - int offs = rowStart[y + z * header.ysize] - rleEnd; - System.arraycopy(tmpData, offs, tmpRead, 0, rowSize[y + z * header.ysize]); - int iPtr = 0; - int oPtr = 0; - for (;;) { - byte pixel = tmpRead[iPtr++]; - int count = (int) (pixel & 0x7F); - if (count == 0) { - return; - } - if ((pixel & 0x80) != 0) { - while ((count--) > 0) { - buf[oPtr++] = tmpRead[iPtr++]; - } - } else { - pixel = tmpRead[iPtr++]; - while ((count--) > 0) { - buf[oPtr++] = pixel; - } - } - } - } else { - int offs = (y * header.xsize) + (z * header.xsize * header.ysize); - System.arraycopy(tmpData, offs, buf, 0, header.xsize); - } - } - - private void bwtorgba(byte[] b, byte[] dest, int lptr) { - for (int i = 0; i < b.length; i++) { - dest[4 * i + lptr + 0] = b[i]; - dest[4 * i + lptr + 1] = b[i]; - dest[4 * i + lptr + 2] = b[i]; - dest[4 * i + lptr + 3] = (byte) 0xFF; - } - } - - private void latorgba(byte[] b, byte[] a, byte[] dest, int lptr) { - for (int i = 0; i < b.length; i++) { - dest[4 * i + lptr + 0] = b[i]; - dest[4 * i + lptr + 1] = b[i]; - dest[4 * i + lptr + 2] = b[i]; - dest[4 * i + lptr + 3] = a[i]; - } - } - - private void rgbtorgba(byte[] r, byte[] g, byte[] b, byte[] dest, int lptr) { - for (int i = 0; i < b.length; i++) { - dest[4 * i + lptr + 0] = r[i]; - dest[4 * i + lptr + 1] = g[i]; - dest[4 * i + lptr + 2] = b[i]; - dest[4 * i + lptr + 3] = (byte) 0xFF; - } - } - - private void rgbatorgba(byte[] r, byte[] g, byte[] b, byte[] a, byte[] dest, int lptr) { - for (int i = 0; i < b.length; i++) { - dest[4 * i + lptr + 0] = r[i]; - dest[4 * i + lptr + 1] = g[i]; - dest[4 * i + lptr + 2] = b[i]; - dest[4 * i + lptr + 3] = a[i]; - } - } - - private static byte imgref(byte[] i, - int x, - int y, - int z, - int xs, - int ys, - int zs) { - return i[(xs*ys*z)+(xs*y)+x]; - } - - - private void writeHeader(DataOutputStream stream, - int xsize, int ysize, int zsize, boolean rle) throws IOException { - // effects: outputs the 512-byte IRIS RGB header to STREAM, using xsize, - // ysize, and depth as the dimensions of the image. NOTE that - // the following defaults are used: - // STORAGE = 1 (storage format = RLE) - // BPC = 1 (# bytes/channel) - // DIMENSION = 3 - // PIXMIN = 0 - // PIXMAX = 255 - // IMAGENAME = <80 nulls> - // COLORMAP = 0 - // See ftp://ftp.sgi.com/pub/sgi/SGIIMAGESPEC for more details. - - // write out MAGIC, STORAGE, BPC - stream.writeShort(474); - stream.write((rle ? 1 : 0)); - stream.write(1); - - // write out DIMENSION - stream.writeShort(3); - - // write XSIZE, YSIZE, ZSIZE - stream.writeShort(xsize); - stream.writeShort(ysize); - stream.writeShort(zsize); - - // write PIXMIN, PIXMAX - stream.writeInt(0); - stream.writeInt(255); - - // write DUMMY - stream.writeInt(0); - - // write IMAGENAME - for (int i = 0; i < 80; i++) - stream.write(0); - - // write COLORMAP - stream.writeInt(0); - - // write DUMMY (404 bytes) - for (int i = 0; i < 404; i++) - stream.write(0); - } - - private void writeImage(File file, - byte[] data, - int xsize, - int ysize, - int zsize, - boolean yflip) throws IOException { - // Input data is in RGBRGBRGB or RGBARGBARGBA format; first unswizzle it - byte[] tmpData = new byte[xsize * ysize * zsize]; - int dest = 0; - for (int i = 0; i < zsize; i++) { - for (int j = i; j < (xsize * ysize * zsize); j += zsize) { - tmpData[dest++] = data[j]; - } - } - data = tmpData; - - // requires: DATA must be an array of size XSIZE * YSIZE * ZSIZE, - // indexed in the following manner: - // data[0] ...data[xsize-1] == first row of first channel - // data[xsize]...data[2*xsize-1] == second row of first channel - // ... data[(ysize - 1) * xsize]...data[(ysize * xsize) - 1] == - // last row of first channel - // Later channels follow the same format. - // *** NOTE that "first row" is defined by the BOTTOM ROW of - // the image. That is, the origin is in the lower left corner. - // effects: writes out an SGI image to FILE, RLE-compressed, INCLUDING - // header, of dimensions (xsize, ysize, zsize), and containing - // the data in DATA. If YFLIP is set, outputs the data in DATA - // in reverse order vertically (equivalent to a flip about the - // x axis). - - // Build the offset tables - int[] starttab = new int[ysize * zsize]; - int[] lengthtab = new int[ysize * zsize]; - - // Temporary buffer for holding RLE data. - // Note that this makes the assumption that RLE-compressed data will - // never exceed twice the size of the input data. - // There are surely formal proofs about how big the RLE buffer should - // be, as well as what the optimal look-ahead size is (i.e. don't switch - // copy/repeat modes for less than N repeats). However, I'm going from - // empirical evidence here; the break-even point seems to be a look- - // ahead of 3. (That is, if the three values following this one are all - // the same as the current value, switch to repeat mode.) - int lookahead = 3; - byte[] rlebuf = new byte[2 * xsize * ysize * zsize]; - - int cur_loc = 0; // current offset location. - int ptr = 0; - int total_size = 0; - int ystart = 0; - int yincr = 1; - int yend = ysize; - - if (yflip) { - ystart = ysize - 1; - yend = -1; - yincr = -1; - } - - boolean DEBUG = false; - - for (int z = 0; z < zsize; z++) { - for (int y = ystart; y != yend; y += yincr) { - // RLE-compress each row. - - int x = 0; - byte count = 0; - boolean repeat_mode = false; - boolean should_switch = false; - int start_ptr = ptr; - int num_ptr = ptr++; - byte repeat_val = 0; - - while (x < xsize) { - // see if we should switch modes - should_switch = false; - if (repeat_mode) { - if (imgref(data, x, y, z, xsize, ysize, zsize) != repeat_val) { - should_switch = true; - } - } else { - // look ahead to see if we should switch to repeat mode. - // stay within the scanline for the lookahead - if ((x + lookahead) < xsize) { - should_switch = true; - for (int i = 1; i <= lookahead; i++) { - if (DEBUG) - System.err.println("left side was " + ((int) imgref(data, x, y, z, xsize, ysize, zsize)) + - ", right side was " + (int)imgref(data, x+i, y, z, xsize, ysize, zsize)); - - if (imgref(data, x, y, z, xsize, ysize, zsize) != - imgref(data, x+i, y, z, xsize, ysize, zsize)) - should_switch = false; - } - } - } - - if (should_switch || (count == 127)) { - // update the number of elements we repeated/copied - if (x > 0) { - if (repeat_mode) - rlebuf[num_ptr] = count; - else - rlebuf[num_ptr] = (byte) (count | 0x80); - } - // perform mode switch if necessary; output repeat_val if - // switching FROM repeat mode, and set it if switching - // TO repeat mode. - if (repeat_mode) { - if (should_switch) - repeat_mode = false; - rlebuf[ptr++] = repeat_val; - } else { - if (should_switch) - repeat_mode = true; - repeat_val = imgref(data, x, y, z, xsize, ysize, zsize); - } - - if (x > 0) { - // reset the number pointer - num_ptr = ptr++; - // reset number of bytes copied - count = 0; - } - } - - // if not in repeat mode, copy element to ptr - if (!repeat_mode) { - rlebuf[ptr++] = imgref(data, x, y, z, xsize, ysize, zsize); - } - count++; - - if (x == xsize - 1) { - // Need to store the number of pixels we copied/repeated. - if (repeat_mode) { - rlebuf[num_ptr] = count; - // If we ended the row in repeat mode, store the - // repeated value - rlebuf[ptr++] = repeat_val; - } - else - rlebuf[num_ptr] = (byte) (count | 0x80); - - // output zero counter for the last value in the row - rlebuf[ptr++] = 0; - } - - x++; - } - // output this row's length into the length table - int rowlen = ptr - start_ptr; - if (yflip) - lengthtab[ysize*z+(ysize-y-1)] = rowlen; - else - lengthtab[ysize*z+y] = rowlen; - // add to the start table, and update the current offset - if (yflip) - starttab[ysize*z+(ysize-y-1)] = cur_loc; - else - starttab[ysize*z+y] = cur_loc; - cur_loc += rowlen; - } - } - - // Now we have the offset tables computed, as well as the RLE data. - // Output this information to the file. - total_size = ptr; - - if (DEBUG) - System.err.println("total_size was " + total_size); - - DataOutputStream stream = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file))); - - writeHeader(stream, xsize, ysize, zsize, true); - - int SIZEOF_INT = 4; - for (int i = 0; i < (ysize * zsize); i++) - stream.writeInt(starttab[i] + 512 + (2 * ysize * zsize * SIZEOF_INT)); - for (int i = 0; i < (ysize * zsize); i++) - stream.writeInt(lengthtab[i]); - for (int i = 0; i < total_size; i++) - stream.write(rlebuf[i]); - - stream.close(); - } - - private byte[] readAll(DataInputStream in) throws IOException { - byte[] dest = new byte[16384]; - int pos = 0; - int numRead = 0; - - boolean done = false; - - do { - numRead = in.read(dest, pos, dest.length - pos); - if (pos == dest.length) { - // Resize destination buffer - byte[] newDest = new byte[2 * dest.length]; - System.arraycopy(dest, 0, newDest, 0, pos); - dest = newDest; - } - if (numRead > 0) { - pos += numRead; - } - - done = ((numRead == -1) || (in.available() == 0)); - } while (!done); - - // Trim destination buffer - if (pos != dest.length) { - byte[] finalDest = new byte[pos]; - System.arraycopy(dest, 0, finalDest, 0, pos); - dest = finalDest; - } - - return dest; - } - - // Test case - /* - public static void main(String[] args) { - for (int i = 0; i < args.length; i++) { - try { - System.out.println(args[i] + ":"); - SGIImage image = SGIImage.read(args[i]); - System.out.println(image); - BufferedImage img = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_4BYTE_ABGR); - WritableRaster raster = img.getRaster(); - DataBufferByte db = (DataBufferByte) raster.getDataBuffer(); - byte[] src = image.getData(); - byte[] dest = db.getData(); - for (int j = 0; j < src.length; j += 4) { - dest[j + 0] = src[j + 3]; - dest[j + 1] = src[j + 2]; - dest[j + 2] = src[j + 1]; - dest[j + 3] = src[j + 0]; - } - // System.arraycopy(src, 0, dest, 0, src.length); - ImageIcon icon = new ImageIcon(img); - JLabel label = new JLabel(); - label.setIcon(icon); - JFrame frame = new JFrame(args[i]); - frame.getContentPane().add(label); - frame.pack(); - frame.show(); - } catch (IOException e) { - e.printStackTrace(); - } - } - } - */ -} |