/* * 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. * * NOTE: The Original Code (as defined below) has been licensed to Sun * Microsystems, Inc. ("Sun") under the SGI Free Software License B * (Version 1.1), shown above ("SGI License"). Pursuant to Section * 3.2(3) of the SGI License, Sun is distributing the Covered Code to * you under an alternative license ("Alternative License"). This * Alternative License includes all of the provisions of the SGI License * except that Section 2.2 and 11 are omitted. Any differences between * the Alternative License and the SGI License are offered solely by Sun * and not by SGI. * * 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 com.sun.opengl.impl.glu.mipmap; import javax.media.opengl.GL; import javax.media.opengl.GL2; import javax.media.opengl.glu.GLU; import javax.media.opengl.util.BufferUtil; import java.nio.*; /** * * @author Administrator */ public class ScaleInternal { public static final float UINT_MAX = (float)(0x00000000FFFFFFFF); public static void scale_internal( int components, int widthin, int heightin, ShortBuffer datain, int widthout, int heightout, ShortBuffer dataout ) { float x, lowx, highx, convx, halfconvx; float y, lowy, highy, convy, halfconvy; float xpercent, ypercent; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, yint, xint, xindex, yindex; int temp; if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage( components, widthin, heightin, datain, dataout ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; halfconvx = convx / 2; halfconvy = convy / 2; for( i = 0; i < heightout; i++ ) { y = convy * ( i + 0.5f ); if( heightin > heightout ) { highy = y + halfconvy; lowy = y - halfconvy; } else { highy = y + 0.5f; lowy = y - 0.5f; } for( j = 0; j < widthout; j++ ) { x = convx * ( j + 0.5f ); if( widthin > widthout ) { highx = x + halfconvx; lowx = x - halfconvx; } else { highx = x + 0.5f; lowx = x - 0.5f; } // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; area = 0.0f; y = lowy; yint = (int)Math.floor( y ); while( y < highy ) { yindex = ( yint + heightin ) % heightin; if( highy < yint + 1 ) { ypercent = highy - y; } else { ypercent = yint + 1 - y; } x = lowx; xint = (int)Math.floor( x ); while( x < highx ) { xindex = ( xint + widthin ) % widthin; if( highx < xint + 1 ) { xpercent = highx -x; } else { xpercent = xint + 1 - x; } percent = xpercent * ypercent; area += percent; temp = ( xindex + ( yindex * widthin) ) * components; for( k = 0; k < components; k++ ) { totals[k] += datain.get( temp + k ) * percent; } xint++; x = xint; } yint++; y = yint; } temp = ( j + ( i * widthout ) ) * components; for( k = 0; k < components; k++ ) { // totals[] should be rounded in the case of enlarging an RGB // ramp when the type is 332 or 4444 dataout.put( temp + k, (short)((totals[k] + 0.5f) / area) ); } } } } public static void scale_internal_ubyte( int components, int widthin, int heightin, ByteBuffer datain, int widthout, int heightout, ByteBuffer dataout, int element_size, int ysize, int group_size ) { float x, convx; float y, convy; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outindex; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage_ubyte( components, widthin, heightin, datain, dataout, element_size, ysize, group_size ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convy_float; for( i = 0; i < heightout; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightin) highy_int = heightin - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthout; j++ ) { // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // caulate the value for pixels in the 1st row xindex = lowx_int * group_size; if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * ysize; percent = y_percent * ( 1 - lowx_float ); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * y_percent; } } temp += group_size; right = temp; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * y_percent; } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } // calculate the value for the pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += ysize; right += ysize; for( k = 0; k < components; k++, left += element_size, right += element_size ) { float f = 0.0f; datain.position( left ); f = ( 0x000000FF & datain.get() ) * ( 1.0f - lowx_float ); datain.position( right ); f += ( 0x000000FF & datain.get() ) * highx_float; totals[k] += f; } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float) * x_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * x_percent; } } percent = x_percent * highy_float; temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * y_percent; } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ) * percent; } } // this is for the pixels in the body temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += ( 0x000000FF & datain.get() ); } temp += group_size; } temp0 += ysize; } outindex = ( j + ( i * widthout ) ) * components; for( k = 0; k < components; k++ ) { dataout.position( outindex + k ); dataout.put( (byte)(totals[k] / area) ); } lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthin - 1) { int delta = (highx_int - widthin + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } } public static void scale_internal_byte( int components, int widthin, int heightin, ByteBuffer datain, int widthout, int heightout, ByteBuffer dataout, int element_size, int ysize, int group_size ) { float x, convx; float y, convy; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outindex; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage_byte( components, widthin, heightin, datain, dataout, element_size, ysize, group_size ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convy_float; for( i = 0; i < heightout; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightin) highy_int = heightin - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthout; j++ ) { // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // caulate the value for pixels in the 1st row xindex = lowx_int * group_size; if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * ysize; percent = y_percent * ( 1 - lowx_float ); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * y_percent; } } temp += group_size; right = temp; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * y_percent; } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } // calculate the value for the pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += ysize; right += ysize; for( k = 0; k < components; k++, left += element_size, right += element_size ) { float f = 0.0f; datain.position( left ); f = datain.get() * ( 1 - lowx_float ); datain.position( right ); f += datain.get() * highx_float; totals[k] += f; } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float) * x_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * x_percent; } } percent = x_percent * highy_float; temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * y_percent; } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get() * percent; } } // this is for the pixels in the body temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); totals[k] += datain.get(); } temp += group_size; } temp0 += ysize; } outindex = ( j + ( i * widthout ) ) * components; for( k = 0; k < components; k++ ) { dataout.position( outindex + k ); dataout.put( (byte)(totals[k] / area) ); } lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthin - 1) { int delta = (highx_int - widthin + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } } public static void scale_internal_ushort( int components, int widthin, int heightin, ByteBuffer datain, int widthout, int heightout, ShortBuffer dataout, int element_size, int ysize, int group_size, boolean myswap_bytes ) { float x, convx; float y, convy; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outindex; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage_ushort( components, widthin, heightin, datain, dataout, element_size, ysize, group_size, myswap_bytes ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convy_float; for( i = 0; i < heightout; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightin) highy_int = heightin - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthout; j++ ) { // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // caulate the value for pixels in the 1st row xindex = lowx_int * group_size; if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * ysize; percent = y_percent * ( 1 - lowx_float ); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += ( 0x0000FFFF & ((int)Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ))) * percent; } else { totals[k] += ( 0x0000FFFF & datain.getShort() ) * percent; } } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += ( 0x0000FFFF & ((int)Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ))) * y_percent; } else { totals[k] += ( 0x0000FFFF & datain.getShort()) * y_percent; } } } temp += group_size; right = temp; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += ( 0x0000FFFF & (Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ))) * percent; } else { totals[k] += ( 0x0000FFFF & datain.getShort()) * percent; } } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * percent; } else { totals[k] += ( 0x0000FFFF & datain.getShort() ) * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * y_percent; } else { totals[k] += ( 0x0000FFFF & datain.getShort()) * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += ( 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * percent; } else { totals[k] += ( 0x0000FFFF & datain.getShort()) * percent; } } // calculate the value for the pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += ysize; right += ysize; for( k = 0; k < components; k++, left += element_size, right += element_size ) { if( myswap_bytes ) { datain.position( left ); float f = (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES(datain.getShort())) * ( 1 - lowx_float ); datain.position( right ); f += ((0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES(datain.getShort())) * highx_float); totals[k] += f; } else { datain.position( left ); float f = ((0x0000FFFF & datain.getShort()) * ( 1 - lowx_float )); datain.position( right ); f += ((0x0000FFFF & datain.getShort()) * highx_float); totals[k] += f; } } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float) * x_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() )) * percent; } else { totals[k] += (0x0000FFFF & datain.getShort()) * percent; } } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * x_percent; } else { totals[k] += (0x0000FFFF & datain.getShort()) * x_percent; } } } percent = x_percent * highy_float; temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort() )) * percent; } else { totals[k] += (0x0000FFFF & datain.getShort()) * percent; } } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * percent; } else { totals[k] += (0x0000FFFF & datain.getShort()) * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * y_percent; } else { totals[k] += (0x0000FFFF & datain.getShort()) * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * percent; } else { totals[k] += (0x0000FFFF & datain.getShort()) * percent; } } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort()) ) * percent; } else { totals[k] += (0x0000FFFF & datain.getShort()) * percent; } } } // this is for the pixels in the body temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( datain.getShort())); } else { totals[k] += (0x0000FFFF & datain.getShort()); } } temp += group_size; } temp0 += ysize; } outindex = ( j + ( i * widthout ) ) * components; for( k = 0; k < components; k++ ) { dataout.position( outindex + k ); dataout.put( (short)(totals[k] / area) ); } lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthin - 1) { int delta = (highx_int - widthin + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } } public static void scale_internal_short( int components, int widthin, int heightin, ByteBuffer datain, int widthout, int heightout, ShortBuffer dataout, int element_size, int ysize, int group_size, boolean myswap_bytes ) { float x, convx; float y, convy; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outindex; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; int swapbuf; // unsigned buffer if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage_short( components, widthin, heightin, datain, dataout, element_size, ysize, group_size, myswap_bytes ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convy_float; for( i = 0; i < heightout; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightin) highy_int = heightin - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthout; j++ ) { // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // caulate the value for pixels in the 1st row xindex = lowx_int * group_size; if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * ysize; percent = y_percent * ( 1 - lowx_float ); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getShort() * y_percent; } } } temp += group_size; right = temp; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getShort() * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } // calculate the value for the pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += ysize; right += ysize; for( k = 0; k < components; k++, left += element_size, right += element_size ) { if( myswap_bytes ) { datain.position( left ); swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * ( 1 - lowx_float ); datain.position( right ); swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * highx_float; } else { datain.position( left ); totals[k] += datain.getShort() * ( 1 - lowx_float ); datain.position( right ); totals[k] += datain.getShort() * highx_float; } } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float) * x_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort()); totals[k] += swapbuf * x_percent; } else { totals[k] += datain.getShort() * x_percent; } } } percent = x_percent * highy_float; temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getShort() * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getShort() * percent; } } } // this is for the pixels in the body temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_2_BYTES( datain.getShort() ); totals[k] += swapbuf; } else { totals[k] += datain.getShort(); } } temp += group_size; } temp0 += ysize; } outindex = ( j + ( i * widthout ) ) * components; for( k = 0; k < components; k++ ) { dataout.position( outindex + k ); dataout.put( (short)(totals[k] / area) ); } lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthin - 1) { int delta = (highx_int - widthin + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } } public static void scale_internal_uint( int components, int widthin, int heightin, ByteBuffer datain, int widthout, int heightout, IntBuffer dataout, int element_size, int ysize, int group_size, boolean myswap_bytes ) { float x, convx; float y, convy; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outindex; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage_uint( components, widthin, heightin, datain, dataout, element_size, ysize, group_size, myswap_bytes ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convy_float; for( i = 0; i < heightout; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightin) highy_int = heightin - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthout; j++ ) { // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // caulate the value for pixels in the 1st row xindex = lowx_int * group_size; if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * ysize; percent = y_percent * ( 1 - lowx_float ); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt()) ) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt()) ) * y_percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * y_percent; } } } temp += group_size; right = temp; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt()) ) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt()) ) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt()) ) * y_percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt()) ) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } // calculate the value for the pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += ysize; right += ysize; for( k = 0; k < components; k++, left += element_size, right += element_size ) { if( myswap_bytes ) { datain.position( left ); totals[k] += ((0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES(datain.getInt())) * ( 1 - lowx_float )); datain.position( right ); totals[k] += ((0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES(datain.getInt())) * highx_float); } else { datain.position( left ); totals[k] += ((0x00000000FFFFFFFF & datain.getInt()) * ( 1 - lowx_float )); datain.position( right ); totals[k] += ((0x00000000FFFFFFFF & datain.getInt()) * highx_float); } } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float) * x_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())) * x_percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * x_percent; } } } percent = x_percent * highy_float; temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())) * y_percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { long tempInt0 = ( 0xFFFFFFFFL & datain.getInt( temp_index ) ); datain.position( temp_index ); long tempInt1 = ( 0xFFFFFFFFL & datain.getInt() ); datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())) * percent; } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent; } } } // this is for the pixels in the body temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { totals[k] += (0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( datain.getInt())); } else { totals[k] += (0x00000000FFFFFFFF & datain.getInt()); } } temp += group_size; } temp0 += ysize; } outindex = ( j + ( i * widthout ) ) * components; float value = 0.0f; for( k = 0; k < components; k++ ) { value = totals[k] / area; dataout.position( outindex + k ); if( value >= UINT_MAX ) { dataout.put( (int)value ); } else { dataout.put( (int)(totals[k] / area) ); } } lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthin - 1) { int delta = (highx_int - widthin + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } } public static void scale_internal_int( int components, int widthin, int heightin, ByteBuffer datain, int widthout, int heightout, IntBuffer dataout, int element_size, int ysize, int group_size, boolean myswap_bytes ) { float x, convx; float y, convy; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outindex; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; long swapbuf; // unsigned buffer if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage_int( components, widthin, heightin, datain, dataout, element_size, ysize, group_size, myswap_bytes ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convy_float; for( i = 0; i < heightout; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightin) highy_int = heightin - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthout; j++ ) { // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // caulate the value for pixels in the 1st row xindex = lowx_int * group_size; if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * ysize; percent = y_percent * ( 1 - lowx_float ); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getInt() * y_percent; } } } temp += group_size; right = temp; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getInt() * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } // calculate the value for the pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += ysize; right += ysize; for( k = 0; k < components; k++, left += element_size, right += element_size ) { if( myswap_bytes ) { datain.position( left ); swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * ( 1 - lowx_float ); datain.position( right ); swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * highx_float; } else { datain.position( left ); totals[k] += (datain.getInt() * ( 1 - lowx_float )); datain.position( right ); totals[k] += (datain.getInt() * highx_float); } } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float) * x_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * x_percent; } else { totals[k] += datain.getInt() * x_percent; } } } percent = x_percent * highy_float; temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getInt() * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getInt() * percent; } } } // this is for the pixels in the body temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getInt() ); totals[k] += swapbuf; } else { totals[k] += datain.getInt(); } } temp += group_size; } temp0 += ysize; } outindex = ( j + ( i * widthout ) ) * components; for( k = 0; k < components; k++ ) { dataout.position( outindex + k ); dataout.put( (int)(totals[k] / area) ); } lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthin - 1) { int delta = (highx_int - widthin + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } } public static void scale_internal_float( int components, int widthin, int heightin, ByteBuffer datain, int widthout, int heightout, FloatBuffer dataout, int element_size, int ysize, int group_size, boolean myswap_bytes ) { float x, convx; float y, convy; float percent; // Max components in a format is 4, so... float[] totals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outindex; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; float swapbuf; // unsigned buffer if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) { HalveImage.halveImage_float( components, widthin, heightin, datain, dataout, element_size, ysize, group_size, myswap_bytes ); return; } convy = (float)heightin / heightout; convx = (float)widthin / widthout; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convy_float; for( i = 0; i < heightout; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightin) highy_int = heightin - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthout; j++ ) { // Ok, now apply box filter to box that goes from (lowx, lowy) // to (highx, highy) on input data into this pixel on output // data. totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // caulate the value for pixels in the 1st row xindex = lowx_int * group_size; if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * ysize; percent = y_percent * ( 1 - lowx_float ); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getFloat() * y_percent; } } } temp += group_size; right = temp; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getFloat() * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } // calculate the value for the pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += ysize; right += ysize; for( k = 0; k < components; k++, left += element_size, right += element_size ) { if( myswap_bytes ) { datain.position( left ); swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * ( 1 - lowx_float ); datain.position( right ); swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * highx_float; } else { datain.position( left ); totals[k] += (datain.getFloat() * ( 1 - lowx_float )); datain.position( right ); totals[k] += (datain.getFloat() * highx_float); } } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float) * x_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * x_percent; } else { totals[k] += datain.getFloat() * x_percent; } } } percent = x_percent * highy_float; temp += ysize; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += group_size; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * y_percent; } else { totals[k] += datain.getFloat() * y_percent; } } } temp += group_size; percent = y_percent * highx_float; for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + (lowy_int * ysize); for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf * percent; } else { totals[k] += datain.getFloat() * percent; } } } // this is for the pixels in the body temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { for( k = 0, temp_index = temp; k < components; k++, temp_index += element_size ) { datain.position( temp_index ); if( myswap_bytes ) { swapbuf = Mipmap.GLU_SWAP_4_BYTES( datain.getFloat() ); totals[k] += swapbuf; } else { totals[k] += datain.getFloat(); } } temp += group_size; } temp0 += ysize; } outindex = ( j + ( i * widthout ) ) * components; for( k = 0; k < components; k++ ) { dataout.position( outindex + k ); dataout.put( (totals[k] / area) ); } lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthin - 1) { int delta = (highx_int - widthin + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } } public static void scaleInternalPackedPixel( int components, Extract extract, int widthIn, int heightIn, ByteBuffer dataIn, int widthOut, int heightOut, ByteBuffer dataOut, int pixelSizeInBytes, int rowSizeInBytes, boolean isSwap ) { float x, convx; float y, convy; float percent; // max components in a format is 4, so float[] totals = new float[4]; float[] extractTotals = new float[4]; float[] extractMoreTotals = new float[4]; float[] shoveTotals = new float[4]; float area; int i, j, k, xindex; int temp, temp0; int temp_index; int outIndex = 0; int lowx_int, highx_int, lowy_int, highy_int; float x_percent, y_percent; float lowx_float, highx_float, lowy_float, highy_float; float convy_float, convx_float; int convy_int, convx_int; int l, m; int left, right; if( widthIn == widthOut * 2 && heightIn == heightOut * 2 ) { HalveImage.halveImagePackedPixel( components, extract, widthIn, heightIn, dataIn, dataOut, pixelSizeInBytes, rowSizeInBytes, isSwap ); return; } convy = (float)heightIn / (float)heightOut; convx = (float)widthIn / (float)widthOut; convy_int = (int)Math.floor( convy ); convy_float = convy - convy_int; convx_int = (int)Math.floor( convx ); convx_float = convx - convx_int; area = convx * convy; lowy_int = 0; lowy_float = 0.0f; highy_int = convy_int; highy_float = convx_float; for( i = 0; i < heightOut; i++ ) { // Clamp here to be sure we don't read beyond input buffer. if (highy_int >= heightIn) highy_int = heightIn - 1; lowx_int = 0; lowx_float = 0.0f; highx_int = convx_int; highx_float = convx_float; for( j = 0; j < widthOut; j++ ) { // ok now apply box filter to box that goes from( lowx, lowy ) // to ( highx, highy ) on input data into this pixel on output data totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; // calculate that value for pixels in the 1st row xindex = lowx_int * pixelSizeInBytes; if( (highy_int > lowy_int) && (highx_int > lowx_int) ) { y_percent = 1 - lowy_float; temp = xindex + lowy_int * rowSizeInBytes; percent = y_percent * ( 1 - lowx_float ); dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } left = temp; for( l = lowx_int + 1; l < highx_int; l++ ) { temp += pixelSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * y_percent; } } temp += pixelSizeInBytes; right = temp; percent = y_percent * highx_float; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } // calculate the value for pixels in the last row y_percent = highy_float; percent = y_percent * ( 1 - lowx_float ); temp = xindex + highy_int * rowSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += pixelSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * y_percent; } } temp += pixelSizeInBytes; percent = y_percent * highx_float; dataIn.position( temp ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } // calculate the value for pixels in the 1st and last column for( m = lowy_int + 1; m < highy_int; m++ ) { left += rowSizeInBytes; right += rowSizeInBytes; dataIn.position( left ); extract.extract( isSwap, dataIn, extractTotals ); dataIn.position( right ); extract.extract( isSwap, dataIn, extractMoreTotals ); for( k = 0; k < components; k++ ) { totals[k] += ( extractTotals[k] * ( 1 - lowx_float ) + extractMoreTotals[k] * highx_float ); } } } else if( highy_int > lowy_int ) { x_percent = highx_float - lowx_float; percent = ( 1 - lowy_float ) * x_percent; temp = xindex + lowy_int * rowSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } for( m = lowy_int + 1; m < highy_int; m++ ) { temp += rowSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * x_percent; } } percent = x_percent * highy_float; temp += rowSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } } else if( highx_int > lowx_int ) { y_percent = highy_float - lowy_float; percent = ( 1 - lowx_float ) * y_percent; temp = xindex + lowy_int * rowSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } for( l = lowx_int + 1; l < highx_int; l++ ) { temp += pixelSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * y_percent; } } temp += pixelSizeInBytes; percent = y_percent * highx_float; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } } else { percent = ( highy_float - lowy_float ) * ( highx_float - lowx_float ); temp = xindex + lowy_int * rowSizeInBytes; dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } } // this is for the pixels in the body temp0 = xindex + pixelSizeInBytes + ( lowy_int + 1 ) * rowSizeInBytes; for( m = lowy_int + 1; m < highy_int; m++ ) { temp = temp0; for( l = lowx_int + 1; l < highx_int; l++ ) { dataIn.position( temp ); extract.extract( isSwap, dataIn, extractTotals ); for( k = 0; k < components; k++ ) { totals[k] += extractTotals[k] * percent; } temp += pixelSizeInBytes; } temp0 += rowSizeInBytes; } outIndex = ( j + ( i * widthOut ) ); for( k = 0; k < components; k++ ) { shoveTotals[k] = totals[k] / area; } extract.shove( shoveTotals, outIndex, dataOut ); lowx_int = highx_int; lowx_float = highx_float; highx_int += convx_int; highx_float += convx_float; if( highx_float > 1.0f ) { highx_float -= 1.0f; highx_int++; } // Clamp to make sure we don't run off the right edge if (highx_int > widthIn - 1) { int delta = (highx_int - widthIn + 1); lowx_int -= delta; highx_int -= delta; } } lowy_int = highy_int; lowy_float = highy_float; highy_int += convy_int; highy_float += convy_float; if( highy_float > 1.0f ) { highy_float -= 1.0f; highy_int++; } } assert( outIndex == ( widthOut * heightOut - 1) ); } public static void scaleInternal3D( int components, int widthIn, int heightIn, int depthIn, ShortBuffer dataIn, int widthOut, int heightOut, int depthOut, ShortBuffer dataOut ) { float x, lowx, highx, convx, halfconvx; float y, lowy, highy, convy, halfconvy; float z, lowz, highz, convz, halfconvz; float xpercent, ypercent, zpercent; float percent; // max compnents in a format is 4 float[] totals = new float[4]; float volume; int i, j, d, k, zint, yint, xint, xindex, yindex, zindex; int temp; lowy = highy = lowx = highx = 0.0f; convz = (float)depthIn / depthOut; convy = (float)heightIn / heightOut; convx = (float)widthIn / widthOut; halfconvz = convz / 2.0f; halfconvy = convy / 2.0f; halfconvx = convx / 2.0f; for( d = 0; d < depthOut; d++ ) { z = convz * ( d + 0.5f ); if( depthIn > depthOut ) { highz = z + halfconvz; lowz = z - halfconvz; } else { highz = z + 0.5f; lowz = z - 0.5f; } for( i = 0; i < heightOut; i++ ) { y = convy * ( i + 0.5f ); if( heightIn > heightOut ) { highz = y + halfconvy; lowz = y - halfconvy; } else { highz = y + 0.5f; lowz = y - 0.5f; } for( j = 0; j < widthOut; j++ ) { x = convx * ( j + 0.5f ); if( depthIn > depthOut ) { highz = x + halfconvx; lowz = x - halfconvx; } else { highz = x + 0.5f; lowz = x - 0.5f; } // Ok, now apply box filter to box that goes from ( lowx, lowy, lowz ) // to ( highx, highy, highz ) on input data into this pixel on output data totals[0] = totals[1] = totals[2] = totals[3] = 0.0f; volume = 0.0f; z = lowz; zint = (int)(Math.floor( z ) ); while( z < highz ) { zindex = ( zint + depthIn ) % depthIn; if( highz < zint + 1 ) { zpercent = highz - z; } else { zpercent = zint + 1 - z; } y = lowy; yint = (int)(Math.floor( y ) ); while( y < highy ) { yindex = ( yint + heightIn ) % heightIn; if( highy < yint + 1 ) { ypercent = highy - y; } else { ypercent = yint + 1 - y; } x = lowx; xint = (int)(Math.floor( x ) ); while( x < highx ) { xindex = (xint + widthIn ) % widthIn; if( highx < xint + 1 ) { xpercent = highx - x; } else { xpercent = xint + 1 - x; } percent = xpercent * ypercent * zpercent; volume += percent; temp = (xindex + ( yindex *widthIn) + (zindex * widthIn *heightIn)) * components; for( k = 0; k < components; k++ ) { assert( 0 <= (temp+k) && (temp+k) < (widthIn * heightIn * depthIn * components) ); totals[k] += dataIn.get( temp + k ) * percent; } xint++; x = xint; } // while x yint++; y = yint; } // while y zint++; z = zint; } // while z temp = ( j + ( i * widthOut ) + (d * widthOut * heightOut ) ) * components; for( k = 0; k < components; k++ ) { // totals should be rounded in the case of enlarging an rgb ramp when the type is 332 or 4444 assert( 0 <= ( temp + k ) && ( temp + k ) < (widthOut * heightOut* depthOut * components) ); dataOut.put( temp + k, (short)((totals[k] + 0.5f) / volume ) ); } } } } } public static int gluScaleImage3D( GL gl, int format, int widthIn, int heightIn, int depthIn, int typeIn, ByteBuffer dataIn, int widthOut, int heightOut, int depthOut, int typeOut, ByteBuffer dataOut ) { int components; ShortBuffer beforeImage, afterImage; PixelStorageModes psm = new PixelStorageModes(); if( widthIn == 0 || heightIn == 0 || depthIn == 0 || widthOut == 0 || heightOut == 0 || depthOut == 0 ) { return( 0 ); } if( widthIn < 0 || heightIn < 0 || depthIn < 0 || widthOut < 0 || heightOut < 0 || depthOut < 0 ) { return( GLU.GLU_INVALID_VALUE ); } if( !Mipmap.legalFormat(format) || !Mipmap.legalType(typeIn) || !Mipmap.legalType(typeOut) || typeIn == GL2.GL_BITMAP || typeOut == GL2.GL_BITMAP ) { return( GLU.GLU_INVALID_ENUM ); } if( !Mipmap.isLegalFormatForPackedPixelType( format, typeIn ) ) { return( GLU.GLU_INVALID_OPERATION ); } if( !Mipmap.isLegalFormatForPackedPixelType( format, typeOut ) ) { return( GLU.GLU_INVALID_OPERATION ); } try { beforeImage = BufferUtil.nativeOrder(ByteBuffer.allocateDirect( Mipmap.imageSize3D( widthIn, heightIn, depthIn, format, GL2.GL_UNSIGNED_SHORT ) )).asShortBuffer(); afterImage = BufferUtil.nativeOrder(ByteBuffer.allocateDirect( Mipmap.imageSize3D( widthIn, heightIn, depthIn, format, GL2.GL_UNSIGNED_SHORT ) )).asShortBuffer(); } catch( OutOfMemoryError err ) { return( GLU.GLU_OUT_OF_MEMORY ); } Mipmap.retrieveStoreModes3D( gl, psm ); Image.fillImage3D( psm, widthIn, heightIn, depthIn, format, typeIn, Mipmap.is_index( format ), dataIn, beforeImage ); components = Mipmap.elements_per_group( format, 0 ); ScaleInternal.scaleInternal3D( components, widthIn, heightIn, depthIn, beforeImage, widthOut, heightOut, depthOut, afterImage ); Image.emptyImage3D( psm, widthOut, heightOut, depthOut, format, typeOut, Mipmap.is_index( format ), afterImage, dataOut ); return( 0 ); } }