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-/*
- * Copyright (c) 2003-2005 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 java.nio.*;
-import java.nio.channels.*;
-import javax.media.opengl.*;
-import com.sun.opengl.utils.*;
-
-/**
- * Targa image reader and writer adapted from sources of the <a href =
- * "http://java.sun.com/products/jimi/">Jimi</a> image I/O class library.
- *
- * <P>
- *
- * Image decoder for image data stored in TGA file format.
- * Currently only the original TGA file format is supported. This is
- * because the new TGA format has data at the end of the file, getting
- * to the end of a file in an InputStream orient environment presents
- * several difficulties which are avoided at the moment.
- *
- * <P>
- *
- * This is a simple decoder and is only setup to load a single image
- * from the input stream
- *
- * <P>
- *
- * @author Robin Luiten
- * @author Kenneth Russell
- * @version $Revision$
- */
-
-public class TGAImage {
- private Header header;
- private int format;
- private ByteBuffer data;
-
- private TGAImage(Header header) {
- this.header = header;
- }
-
- /**
- * This class reads in all of the TGA image header in addition it also
- * reads in the imageID field as it is convenient to handle that here.
- *
- * @author Robin Luiten
- * @version 1.1
- */
- public static class Header {
- /** Set of possible file format TGA types */
- public final static int TYPE_NEW = 0;
- public final static int TYPE_OLD = 1;
- public final static int TYPE_UNK = 2; // cant rewind stream so unknown for now.
-
- /** Set of possible image types in TGA file */
- public final static int NO_IMAGE = 0; // no image data
- public final static int UCOLORMAPPED = 1; // uncompressed color mapped image
- public final static int UTRUECOLOR = 2; // uncompressed true color image
- public final static int UBLACKWHITE = 3; // uncompressed black and white image
- public final static int COLORMAPPED = 9; // compressed color mapped image
- public final static int TRUECOLOR = 10; // compressed true color image
- public final static int BLACKWHITE = 11; // compressed black and white image
-
- /** Field image descriptor bitfield values definitions */
- public final static int ID_ATTRIBPERPIXEL = 0xF;
- public final static int ID_RIGHTTOLEFT = 0x10;
- public final static int ID_TOPTOBOTTOM = 0x20;
- public final static int ID_INTERLEAVE = 0xC0;
-
- /** Field image descriptor / interleave values */
- public final static int I_NOTINTERLEAVED = 0;
- public final static int I_TWOWAY = 1;
- public final static int I_FOURWAY = 2;
-
- /** Type of this TGA file format */
- private int tgaType;
-
- /** initial TGA image data fields */
- private int idLength; // byte value
- private int colorMapType; // byte value
- private int imageType; // byte value
-
- /** TGA image colour map fields */
- private int firstEntryIndex;
- private int colorMapLength;
- private byte colorMapEntrySize;
-
- /** TGA image specification fields */
- private int xOrigin;
- private int yOrigin;
- private int width;
- private int height;
- private byte pixelDepth;
- private byte imageDescriptor;
-
- private byte[] imageIDbuf;
- private String imageID;
-
- // For construction from user data
- Header() {
- tgaType = TYPE_OLD; // dont try and get footer.
- }
-
- Header(LEDataInputStream in) throws IOException {
- int ret;
-
- tgaType = TYPE_OLD; // dont try and get footer.
-
- // initial header fields
- idLength = in.readUnsignedByte();
- colorMapType = in.readUnsignedByte();
- imageType = in.readUnsignedByte();
-
- // color map header fields
- firstEntryIndex = in.readUnsignedShort();
- colorMapLength = in.readUnsignedShort();
- colorMapEntrySize = in.readByte();
-
- // TGA image specification fields
- xOrigin = in.readUnsignedShort();
- yOrigin = in.readUnsignedShort();
- width = in.readUnsignedShort();
- height = in.readUnsignedShort();
- pixelDepth = in.readByte();
- imageDescriptor = in.readByte();
-
- if (idLength > 0) {
- imageIDbuf = new byte[idLength];
- in.read(imageIDbuf, 0, idLength);
- imageID = new String(imageIDbuf, "US-ASCII");
- }
- }
-
- public int tgaType() { return tgaType; }
-
- /** initial TGA image data fields */
- public int idLength() { return idLength; }
- public int colorMapType() { return colorMapType; }
- public int imageType() { return imageType; }
-
- /** TGA image colour map fields */
- public int firstEntryIndex() { return firstEntryIndex; }
- public int colorMapLength() { return colorMapLength; }
- public byte colorMapEntrySize() { return colorMapEntrySize; }
-
- /** TGA image specification fields */
- public int xOrigin() { return xOrigin; }
- public int yOrigin() { return yOrigin; }
- public int width() { return width; }
- public int height() { return height; }
- public byte pixelDepth() { return pixelDepth; }
- public byte imageDescriptor() { return imageDescriptor; }
-
- /** bitfields in imageDescriptor */
- public byte attribPerPixel() { return (byte)(imageDescriptor & ID_ATTRIBPERPIXEL); }
- public boolean rightToLeft() { return ((imageDescriptor & ID_RIGHTTOLEFT) != 0); }
- public boolean topToBottom() { return ((imageDescriptor & ID_TOPTOBOTTOM) != 0); }
- public byte interleave() { return (byte)((imageDescriptor & ID_INTERLEAVE) >> 6); }
-
- public byte[] imageIDbuf() { return imageIDbuf; }
- public String imageID() { return imageID; }
-
- public String toString() {
- return "TGA Header " +
- " id length: " + idLength +
- " color map type: "+ colorMapType +
- " image type: "+ imageType +
- " first entry index: " + firstEntryIndex +
- " color map length: " + colorMapLength +
- " color map entry size: " + colorMapEntrySize +
- " x Origin: " + xOrigin +
- " y Origin: " + yOrigin +
- " width: "+ width +
- " height: "+ height +
- " pixel depth: "+ pixelDepth +
- " image descriptor: "+ imageDescriptor +
- (imageIDbuf == null ? "" : (" ID String: " + imageID));
- }
-
- public int size() { return 18 + idLength; }
-
- // buf must be in little-endian byte order
- private void write(ByteBuffer buf) {
- buf.put((byte) idLength);
- buf.put((byte) colorMapType);
- buf.put((byte) imageType);
- buf.putShort((short) firstEntryIndex);
- buf.putShort((short) colorMapLength);
- buf.put((byte) colorMapEntrySize);
- buf.putShort((short) xOrigin);
- buf.putShort((short) yOrigin);
- buf.putShort((short) width);
- buf.putShort((short) height);
- buf.put((byte) pixelDepth);
- buf.put((byte) imageDescriptor);
- if (idLength > 0) {
- try {
- byte[] chars = imageID.getBytes("US-ASCII");
- buf.put(chars);
- } catch (UnsupportedEncodingException e) {
- throw new RuntimeException(e);
- }
- }
- }
- }
-
-
- /**
- * Identifies the image type of the tga image data and loads
- * it into the JimiImage structure. This was taken from the
- * prototype and modified for the new Jimi structure
- */
- private void decodeImage(LEDataInputStream dIn) throws IOException {
- switch (header.imageType()) {
- case Header.UCOLORMAPPED:
- throw new IOException("TGADecoder Uncompressed Colormapped images not supported");
-
- case Header.UTRUECOLOR: // pixelDepth 15, 16, 24 and 32
- switch (header.pixelDepth) {
- case 16:
- throw new IOException("TGADecoder Compressed 16-bit True Color images not supported");
-
- case 24:
- case 32:
- decodeRGBImageU24_32(dIn);
- break;
- }
- break;
-
- case Header.UBLACKWHITE:
- throw new IOException("TGADecoder Uncompressed Grayscale images not supported");
-
- case Header.COLORMAPPED:
- throw new IOException("TGADecoder Compressed Colormapped images not supported");
-
- case Header.TRUECOLOR:
- throw new IOException("TGADecoder Compressed True Color images not supported");
-
- case Header.BLACKWHITE:
- throw new IOException("TGADecoder Compressed Grayscale images not supported");
- }
- }
-
- /**
- * This assumes that the body is for a 24 bit or 32 bit for a
- * RGB or ARGB image respectively.
- */
- private void decodeRGBImageU24_32(LEDataInputStream dIn) throws IOException {
- int i; // row index
- int j; // column index
- int y; // output row index
- int raw; // index through the raw input buffer
- int rawWidth = header.width() * (header.pixelDepth() / 8);
- byte[] rawBuf = new byte[rawWidth];
- byte[] tmpData = new byte[rawWidth * header.height()];
-
- if (header.pixelDepth() == 24) {
- format = GL.GL_BGR;
- } else {
- assert header.pixelDepth() == 32;
- format = GL.GL_BGRA;
- }
-
- for (i = 0; i < header.height(); ++i) {
- dIn.readFully(rawBuf, 0, rawWidth);
-
- if (header.topToBottom())
- y = header.height - i - 1; // range 0 to (header.height - 1)
- else
- y = i;
-
- System.arraycopy(rawBuf, 0, tmpData, y * rawWidth, rawBuf.length);
- }
-
- data = ByteBuffer.wrap(tmpData);
- }
-
- /** Returns the width of the image. */
- public int getWidth() { return header.width(); }
-
- /** Returns the height of the image. */
- public int getHeight() { return header.height(); }
-
- /** Returns the OpenGL format for this texture; e.g. GL.GL_BGR or GL.GL_BGRA. */
- public int getGLFormat() { return format; }
-
- /** Returns the raw data for this texture in the correct
- (bottom-to-top) order for calls to glTexImage2D. */
- public ByteBuffer getData() { return data; }
-
- /** Reads a Targa image from the specified file. */
- public static TGAImage read(String filename) throws IOException {
- return read(new FileInputStream(filename));
- }
-
- /** Reads a Targa image from the specified InputStream. */
- public static TGAImage read(InputStream in) throws IOException {
- LEDataInputStream dIn = new LEDataInputStream(new BufferedInputStream(in));
-
- Header header = new Header(dIn);
- TGAImage res = new TGAImage(header);
- res.decodeImage(dIn);
- return res;
- }
-
- /** Writes the image in Targa format to the specified file name. */
- public void write(String filename) throws IOException {
- write(new File(filename));
- }
-
- /** Writes the image in Targa format to the specified file. */
- public void write(File file) throws IOException {
- FileOutputStream stream = new FileOutputStream(file);
- FileChannel chan = stream.getChannel();
- ByteBuffer buf = ByteBuffer.allocate(header.size());
- buf.order(ByteOrder.LITTLE_ENDIAN);
- header.write(buf);
- buf.rewind();
- chan.write(buf);
- chan.write(data);
- data.rewind();
- chan.force(true);
- chan.close();
- stream.close();
- }
-
- /** Creates a TGAImage from data supplied by the end user. Shares
- data with the passed ByteBuffer. Assumes the data is already in
- the correct byte order for writing to disk, i.e., BGR or
- BGRA. */
- public static TGAImage createFromData(int width,
- int height,
- boolean hasAlpha,
- boolean topToBottom,
- ByteBuffer data) {
- Header header = new Header();
- header.imageType = Header.UTRUECOLOR;
- header.width = width;
- header.height = height;
- header.pixelDepth = (byte) (hasAlpha ? 32 : 24);
- header.imageDescriptor = (byte) (topToBottom ? Header.ID_TOPTOBOTTOM : 0);
- // Note ID not supported
- TGAImage ret = new TGAImage(header);
- ret.data = data;
- return ret;
- }
-}