From b464faaae70ba12e5842b901a6c6d1601af0e1c7 Mon Sep 17 00:00:00 2001
From: Kenneth Russel <kbrussel@alum.mit.edu>
Date: Mon, 9 Jan 2006 02:37:43 +0000
Subject: Added output support to TGAImage, SGIImage and newly-renamed DDSImage
classes. Added support to TextureIO for writing textures back to disk via new
TextureWriter plug-in interface. Added TextureConvert demo which shows how an
application might convert between arbitrary file formats using these APIs,
including automatic compression to DXT3 format when available.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@525 232f8b59-042b-4e1e-8c03-345bb8c30851
---
src/classes/com/sun/opengl/utils/TGAImage.java | 112 ++++++++++++++++++++-----
1 file changed, 89 insertions(+), 23 deletions(-)
(limited to 'src/classes/com/sun/opengl/utils/TGAImage.java')
diff --git a/src/classes/com/sun/opengl/utils/TGAImage.java b/src/classes/com/sun/opengl/utils/TGAImage.java
index d5505afd5..c676d1a6a 100755
--- a/src/classes/com/sun/opengl/utils/TGAImage.java
+++ b/src/classes/com/sun/opengl/utils/TGAImage.java
@@ -40,11 +40,13 @@
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 adapted from sources of the <a href =
+ * 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>
@@ -70,7 +72,7 @@ import com.sun.opengl.utils.*;
public class TGAImage {
private Header header;
private int format;
- private byte[] data;
+ private ByteBuffer data;
private TGAImage(Header header) {
this.header = header;
@@ -100,7 +102,7 @@ public class TGAImage {
/** Field image descriptor bitfield values definitions */
public final static int ID_ATTRIBPERPIXEL = 0xF;
- public final static int ID_LEFTTORIGHT = 0x10;
+ public final static int ID_RIGHTTOLEFT = 0x10;
public final static int ID_TOPTOBOTTOM = 0x20;
public final static int ID_INTERLEAVE = 0xC0;
@@ -130,15 +132,14 @@ public class TGAImage {
private byte pixelDepth;
private byte imageDescriptor;
- /** bitfields in imageDescriptor */
- private byte attribPerPixel; // how many attribute bits per pixel
- private boolean leftToRight; // order of data on scan line
- private boolean topToBottom; // order scan lines stored
- private byte interleave; // how rows are stored in image data
-
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;
@@ -146,7 +147,7 @@ public class TGAImage {
// initial header fields
idLength = in.readUnsignedByte();
- colorMapType = in.readUnsignedByte();
+ colorMapType = in.readUnsignedByte();
imageType = in.readUnsignedByte();
// color map header fields
@@ -162,11 +163,6 @@ public class TGAImage {
pixelDepth = in.readByte();
imageDescriptor = in.readByte();
- attribPerPixel = (byte)(imageDescriptor & ID_ATTRIBPERPIXEL);
- leftToRight = (imageDescriptor & ID_LEFTTORIGHT) != 0; // not used ?
- topToBottom = (imageDescriptor & ID_TOPTOBOTTOM) != 0;
- interleave = (byte)((imageDescriptor & ID_INTERLEAVE) >> 6);
-
if (idLength > 0) {
imageIDbuf = new byte[idLength];
in.read(imageIDbuf, 0, idLength);
@@ -195,10 +191,10 @@ public class TGAImage {
public byte imageDescriptor() { return imageDescriptor; }
/** bitfields in imageDescriptor */
- public byte attribPerPixel() { return attribPerPixel; }
- public boolean leftToRight() { return leftToRight; }
- public boolean topToBottom() { return topToBottom; }
- public byte interleave() { return interleave; }
+ 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; }
@@ -219,6 +215,32 @@ public class TGAImage {
" 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);
+ }
+ }
+ }
}
@@ -269,7 +291,7 @@ public class TGAImage {
int raw; // index through the raw input buffer
int rawWidth = header.width() * (header.pixelDepth() / 8);
byte[] rawBuf = new byte[rawWidth];
- data = new byte[rawWidth * header.height()];
+ byte[] tmpData = new byte[rawWidth * header.height()];
if (header.pixelDepth() == 24) {
format = GL.GL_BGR;
@@ -281,13 +303,15 @@ public class TGAImage {
for (i = 0; i < header.height(); ++i) {
dIn.readFully(rawBuf, 0, rawWidth);
- if (header.topToBottom)
+ if (header.topToBottom())
y = header.height - i - 1; // range 0 to (header.height - 1)
else
y = i;
- System.arraycopy(rawBuf, 0, data, y * rawWidth, rawBuf.length);
+ System.arraycopy(rawBuf, 0, tmpData, y * rawWidth, rawBuf.length);
}
+
+ data = ByteBuffer.wrap(tmpData);
}
/** Returns the width of the image. */
@@ -301,7 +325,7 @@ public class TGAImage {
/** Returns the raw data for this texture in the correct
(bottom-to-top) order for calls to glTexImage2D. */
- public byte[] getData() { return data; }
+ public ByteBuffer getData() { return data; }
/** Reads a Targa image from the specified file. */
public static TGAImage read(String filename) throws IOException {
@@ -317,4 +341,46 @@ public class TGAImage {
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;
+ }
}
--
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