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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.renderscript;
import android.content.Context;
import android.content.res.Resources;
import android.util.Log;
/**
* Intrinsic for applying a 3x3 convolve to an allocation.
*
**/
public final class ScriptIntrinsicConvolve3x3 extends ScriptIntrinsic {
private final float[] mValues = new float[9];
private Allocation mInput;
private ScriptIntrinsicConvolve3x3(int id, RenderScript rs) {
super(id, rs);
}
/**
* Supported elements types are {@link Element#U8_4}
*
* The default coefficients are.
*
* <code>
* <p> [ 0, 0, 0 ]
* <p> [ 0, 1, 0 ]
* <p> [ 0, 0, 0 ]
* </code>
*
* @param rs The Renderscript context
* @param e Element type for intputs and outputs
*
* @return ScriptIntrinsicConvolve3x3
*/
public static ScriptIntrinsicConvolve3x3 create(RenderScript rs, Element e) {
float f[] = { 0, 0, 0, 0, 1, 0, 0, 0, 0};
if (e != Element.U8_4(rs)) {
throw new RSIllegalArgumentException("Unsuported element type.");
}
int id = rs.nScriptIntrinsicCreate(1, e.getID(rs));
ScriptIntrinsicConvolve3x3 si = new ScriptIntrinsicConvolve3x3(id, rs);
si.setCoefficients(f);
return si;
}
/**
* Set the input of the blur.
* Must match the element type supplied during create.
*
* @param ain The input allocation.
*/
public void setInput(Allocation ain) {
mInput = ain;
bindAllocation(ain, 1);
}
/**
* Set the coefficients for the convolve.
*
* The convolve layout is
* <code>
* <p> [ 0, 1, 2 ]
* <p> [ 3, 4, 5 ]
* <p> [ 6, 7, 8 ]
* </code>
*
* @param v The array of coefficients to set
*/
public void setCoefficients(float v[]) {
FieldPacker fp = new FieldPacker(9*4);
for (int ct=0; ct < mValues.length; ct++) {
mValues[ct] = v[ct];
fp.addF32(mValues[ct]);
}
setVar(0, fp);
}
/**
* Apply the filter to the input and save to the specified
* allocation.
*
* @param aout Output allocation. Must match creation element
* type.
*/
public void forEach(Allocation aout) {
forEach(0, null, aout, null);
}
}
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