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authorFirst Last <[email protected]>2005-02-26 01:41:28 +0000
committerFirst Last <[email protected]>2005-02-26 01:41:28 +0000
commit2bb02ad536c5404f008ff71c6d4ca013abaff683 (patch)
tree81b87f2bc3bd4bfbb005eb0a7c4cb1da54080d92 /src/net/java/games/jogl/impl/mipmap/Extract1555rev.java
parent167641d406619ba710e2d50005b6886d2874a251 (diff)
This commit was manufactured by cvs2svn to create branch 'JSR-231'.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JSR-231@244 232f8b59-042b-4e1e-8c03-345bb8c30851
Diffstat (limited to 'src/net/java/games/jogl/impl/mipmap/Extract1555rev.java')
-rw-r--r--src/net/java/games/jogl/impl/mipmap/Extract1555rev.java87
1 files changed, 87 insertions, 0 deletions
diff --git a/src/net/java/games/jogl/impl/mipmap/Extract1555rev.java b/src/net/java/games/jogl/impl/mipmap/Extract1555rev.java
new file mode 100644
index 000000000..10a132417
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+++ b/src/net/java/games/jogl/impl/mipmap/Extract1555rev.java
@@ -0,0 +1,87 @@
+/*
+ * License Applicability. Except to the extent portions of this file are
+ * made subject to an alternative license as permitted in the SGI Free
+ * Software License B, Version 1.1 (the "License"), the contents of this
+ * file are subject only to the provisions of the License. You may not use
+ * this file except in compliance with the License. You may obtain a copy
+ * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+ * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+ *
+ * http://oss.sgi.com/projects/FreeB
+ *
+ * Note that, as provided in the License, the Software is distributed on an
+ * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+ * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+ * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+ * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+ *
+ * Original Code. The Original Code is: OpenGL Sample Implementation,
+ * Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+ * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+ * Copyright in any portions created by third parties is as indicated
+ * elsewhere herein. All Rights Reserved.
+ *
+ * Additional Notice Provisions: The application programming interfaces
+ * established by SGI in conjunction with the Original Code are The
+ * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+ * April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+ * 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+ * Window System(R) (Version 1.3), released October 19, 1998. This software
+ * was created using the OpenGL(R) version 1.2.1 Sample Implementation
+ * published by SGI, but has not been independently verified as being
+ * compliant with the OpenGL(R) version 1.2.1 Specification.
+ */
+
+package net.java.games.jogl.impl.mipmap;
+
+import java.nio.ByteBuffer;
+
+/**
+ *
+ * @author Administrator
+ */
+public class Extract1555rev implements Extract {
+
+ /** Creates a new instance of Extract1555rev */
+ public Extract1555rev() {
+ }
+
+ public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
+ int ushort = 0;
+
+ if( isSwap ) {
+ ushort = 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( packedPixel.getShort() );
+ } else {
+ ushort = 0x0000FFFF & packedPixel.getShort();
+ }
+
+ // 00000000,00011111 == 0x001F
+ // 00000011,11100000 == 0x03E0
+ // 01111100,00000000 == 0x7C00
+ // 10000000,00000000 == 0x8000
+
+ extractComponents[0] = (float)( ( ushort & 0x001F ) ) / 31.0f;
+ extractComponents[1] = (float)( ( ushort & 0x003E ) >> 5 ) / 31.0f;
+ extractComponents[2] = (float)( ( ushort & 0x7C00 ) >> 10) / 31.0f;
+ extractComponents[3] = (float)( ( ushort & 0x8000 ) >> 15);
+ }
+
+ public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
+ // 00000000,00011111 == 0x001F
+ // 00000011,11100000 == 0x03E0
+ // 01111100,00000000 == 0x7C00
+ // 10000000,00000000 == 0x8000
+
+ assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
+ assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
+ assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
+ assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
+
+ // due to limited precision, need to round before shoving
+ int ushort = (((int)((shoveComponents[0] * 31) + 0.5f) ) & 0x0000001F );
+ ushort |= (((int)((shoveComponents[1] * 31) + 0.5f) << 5) & 0x000003E0 );
+ ushort |= (((int)((shoveComponents[2] * 31) + 0.5f) << 10) & 0x00007C00 );
+ ushort |= (((int)((shoveComponents[3]) + 0.5f) << 15) & 0x00008000 );
+ packedPixel.asShortBuffer().put( index, (short)ushort );
+ }
+}