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/*
* Copyright 1998-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package javax.media.j3d;
/**
* A 2D array of depth (Z) values in floating point format in the range [0,1].
* A value of 0.0 indicates the closest Z value to the user while a value of
* 1.0 indicates the farthest Z value.
*/
class DepthComponentFloatRetained extends DepthComponentRetained {
float depthData[];
/**
* Constructs a new floating-point depth (z-buffer) component object with
* the specified width and height.
* @param width the width of the array of depth values
* @param height the height of the array of depth values
*/
void initialize(int width, int height) {
type = DEPTH_COMPONENT_TYPE_FLOAT;
depthData = new float[width * height];
this.width = width;
this.height = height;
}
/**
* Copies the specified depth data to this object.
* @param depthData array of floats containing the depth data
*/
void setDepthData(float[] depthData) {
int i;
for (i = 0; i < depthData.length; i++)
this.depthData[i] = depthData[i];
}
/**
* Copies the depth data from this object to the specified array.
* @param depthData array of floats that will receive a copy of
* the depth data
*/
void getDepthData(float[] depthData) {
int i;
for (i = 0; i < this.depthData.length; i++)
depthData[i] = this.depthData[i];
}
/*
* retrieve depth data from input buffer
*/
final void retrieveDepth(float[] buf, int wRead, int hRead) {
int srcOffset, dstOffset, i;
// Yup -> Ydown
for (srcOffset = (hRead - 1) * wRead, dstOffset = 0,
i = 0; i < hRead; i++,
srcOffset -= wRead, dstOffset += width) {
System.arraycopy(buf, srcOffset, depthData, dstOffset, wRead);
}
}
}
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