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/*
* Copyright (c) 2008, 2013, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.scenario.effect;
import java.nio.FloatBuffer;
import java.util.HashMap;
import java.util.Map;
import com.sun.scenario.effect.impl.Renderer;
/**
* A buffer that contains floating point data, intended for use as a parameter
* to effects such as {@code DisplacementMap}.
*/
public class FloatMap {
private final int width;
private final int height;
private final FloatBuffer buf;
private boolean cacheValid;
/**
* Constructs a new {@code FloatMap} of the given width and height.
*
* @param width the width of the map, in pixels
* @param height the height of the map, in pixels
* @throws IllegalArgumentException if either {@code width} or
* {@code height} is outside the range [1, 4096]
*/
public FloatMap(int width, int height) {
if (width <= 0 || width > 4096 || height <= 0 || height > 4096) {
throw new IllegalArgumentException("Width and height must be in the range [1, 4096]");
}
this.width = width;
this.height = height;
int size = width * height * 4;
// We allocate a heap-based (indirect) FloatBuffer here because
// some Decora backends aren't yet prepared to deal with direct
// FloatBuffers (and to that end we've exposed the getData() method,
// whose return value is float[]). Note that we use wrap() instead of
// allocate() since the latter is not supported on CDC (specifically
// the NIO subset from JSR 239). The byte order of the FloatBuffer
// will be the native order of the underlying hardware, which is what
// the various Decora backends expect.
this.buf = FloatBuffer.wrap(new float[size]);
}
/**
* Returns the width of the map, in pixels.
*
* @return the width of the map, in pixels
*/
public int getWidth() {
return width;
}
/**
* Returns the height of the map, in pixels.
*
* @return the height of the map, in pixels
*/
public int getHeight() {
return height;
}
public float[] getData() {
// we only use heap-based FloatBuffers (see comment in constructor
// above) so the following is safe
return buf.array();
}
public FloatBuffer getBuffer() {
return buf;
}
/**
* Gets the sample for a specific band from the given {@code (x,y)} location.
*
* @param x the x location
* @param y the y location
* @param band the band to get (must be 1, 2, 3, or 4)
* @return the sample of the specified band at the specified location
*/
public float getSample(int x, int y, int band) {
return buf.get(((x+(y*width))*4)+band);
}
/**
* Sets the sample for a specific band at the given (x,y) location.
*
* @param x the x location
* @param y the y location
* @param band the band to set (must be 1, 2, 3, or 4)
* @param sample the sample value to set
*/
public void setSample(int x, int y, int band, float sample) {
buf.put(((x+(y*width))*4)+band, sample);
cacheValid = false;
}
/**
* Sets the sample for the first band at the given (x,y) location.
*
* @param x the x location
* @param y the y location
* @param s0 the sample value to set for the first band
*/
public void setSamples(int x, int y, float s0) {
int index = (x+(y*width))*4;
buf.put(index+0, s0);
cacheValid = false;
}
/**
* Sets the sample for the first two bands at the given (x,y) location.
*
* @param x the x location
* @param y the y location
* @param s0 the sample value to set for the first band
* @param s1 the sample value to set for the second band
*/
public void setSamples(int x, int y, float s0, float s1) {
int index = (x+(y*width))*4;
buf.put(index+0, s0);
buf.put(index+1, s1);
cacheValid = false;
}
/**
* Sets the sample for the first three bands at the given (x,y) location.
*
* @param x the x location
* @param y the y location
* @param s0 the sample value to set for the first band
* @param s1 the sample value to set for the second band
* @param s2 the sample value to set for the third band
*/
public void setSamples(int x, int y, float s0, float s1, float s2) {
int index = (x+(y*width))*4;
buf.put(index+0, s0);
buf.put(index+1, s1);
buf.put(index+2, s2);
cacheValid = false;
}
/**
* Sets the sample for each of the four bands at the given (x,y) location.
*
* @param x the x location
* @param y the y location
* @param s0 the sample value to set for the first band
* @param s1 the sample value to set for the second band
* @param s2 the sample value to set for the third band
* @param s3 the sample value to set for the fourth band
*/
public void setSamples(int x, int y, float s0, float s1, float s2, float s3) {
int index = (x+(y*width))*4;
buf.put(index+0, s0);
buf.put(index+1, s1);
buf.put(index+2, s2);
buf.put(index+3, s3);
cacheValid = false;
}
public void put(float[] floatBuf) {
buf.rewind();
buf.put(floatBuf);
buf.rewind();
cacheValid = false;
}
private Map cache;
public LockableResource getAccelData(FilterContext fctx) {
if (cache == null) {
cache = new HashMap();
} else if (!cacheValid) {
for (Entry entry : cache.values()) {
entry.valid = false;
}
cacheValid = true;
}
// RT-27553
// TODO: ideally this method wouldn't be public in the first place,
// but even worse, we're assuming that it is called on the QFT from
// HWTwoSamplerPeer.filter()...
Renderer renderer = Renderer.getRenderer(fctx);
Entry entry = cache.get(fctx);
if (entry != null) {
entry.texture.lock();
if (entry.texture.isLost()) {
entry.texture.unlock();
cache.remove(fctx);
entry = null;
}
}
if (entry == null) {
LockableResource texture = renderer.createFloatTexture(width, height);
entry = new Entry(texture);
cache.put(fctx, entry);
}
if (!entry.valid) {
renderer.updateFloatTexture(entry.texture, this);
entry.valid = true;
}
return entry.texture;
}
private static class Entry {
LockableResource texture;
boolean valid;
Entry(LockableResource texture) {
this.texture = texture;
}
}
}
