diff options
author | Kenneth Russel <[email protected]> | 2008-12-30 21:30:16 +0000 |
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committer | Kenneth Russel <[email protected]> | 2008-12-30 21:30:16 +0000 |
commit | c8e79f576c54217c66ddef52e53b10f55f3c3721 (patch) | |
tree | d49e6e5b87c903d25fc2a736d29a8363068adbe1 /src/classes/com/sun/opengl/util/TGAWriter.java | |
parent | c4a88c8fa63ca94e50e4cd3d695b50563fee6ace (diff) |
Moved FileUtil and StreamUtil classes back into com.sun.opengl.util
package. Moved TGAWriter back into com.sun.opengl.util package to
prevent creating a new package for a single class. Updated
implementation and demos.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1836 232f8b59-042b-4e1e-8c03-345bb8c30851
Diffstat (limited to 'src/classes/com/sun/opengl/util/TGAWriter.java')
-rwxr-xr-x | src/classes/com/sun/opengl/util/TGAWriter.java | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/classes/com/sun/opengl/util/TGAWriter.java b/src/classes/com/sun/opengl/util/TGAWriter.java new file mode 100755 index 000000000..c5b1041a0 --- /dev/null +++ b/src/classes/com/sun/opengl/util/TGAWriter.java @@ -0,0 +1,118 @@ +/* + * 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. + */ + +package com.sun.opengl.util; + +import java.io.*; +import java.nio.*; +import java.nio.channels.*; + +/** + * Utility class which helps take fast screenshots of OpenGL rendering + * results into Targa-format files. Used by the {@link + * com.sun.opengl.util.gl2.Screenshot Screenshot} class; can also be used + * in conjunction with the {@link com.sun.opengl.util.gl2.TileRenderer + * TileRenderer} class. <P> + */ + +public class TGAWriter { + private static final int TARGA_HEADER_SIZE = 18; + + private FileChannel ch; + private ByteBuffer buf; + + /** Constructor for the TGAWriter. */ + public TGAWriter() { + } + + /** + * Opens the specified Targa file for writing, overwriting any + * existing file, and sets up the header of the file expecting the + * data to be filled in before closing it. + * + * @param file the file to write containing the screenshot + * @param width the width of the current drawable + * @param height the height of the current drawable + * @param alpha whether the alpha channel should be saved. If true, + * requires GL_EXT_abgr extension to be present. + * + * @throws IOException if an I/O error occurred while writing the + * file + */ + public void open(File file, + int width, + int height, + boolean alpha) throws IOException { + RandomAccessFile out = new RandomAccessFile(file, "rw"); + ch = out.getChannel(); + int pixelSize = (alpha ? 32 : 24); + int numChannels = (alpha ? 4 : 3); + + int fileLength = TARGA_HEADER_SIZE + width * height * numChannels; + out.setLength(fileLength); + MappedByteBuffer image = ch.map(FileChannel.MapMode.READ_WRITE, 0, fileLength); + + // write the TARGA header + image.put(0, (byte) 0).put(1, (byte) 0); + image.put(2, (byte) 2); // uncompressed type + image.put(12, (byte) (width & 0xFF)); // width + image.put(13, (byte) (width >> 8)); // width + image.put(14, (byte) (height & 0xFF)); // height + image.put(15, (byte) (height >> 8)); // height + image.put(16, (byte) pixelSize); // pixel size + + // go to image data position + image.position(TARGA_HEADER_SIZE); + // jogl needs a sliced buffer + buf = image.slice(); + } + + /** + * Returns the ByteBuffer corresponding to the data for the image. + * This must be filled in with data in either BGR or BGRA format + * depending on whether an alpha channel was specified during + * open(). + */ + public ByteBuffer getImageData() { + return buf; + } + + public void close() throws IOException { + // close the file channel + ch.close(); + buf = null; + } +} |