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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;
/**
* Intrinsic Gausian blur filter. Applies a gaussian blur of the
* specified radius to all elements of an allocation.
*
*
**/
public final class ScriptIntrinsicBlur extends ScriptIntrinsic {
private final float[] mValues = new float[9];
private Allocation mInput;
private ScriptIntrinsicBlur(long id, RenderScript rs) {
super(id, rs);
}
/**
* Create an intrinsic for applying a blur to an allocation. The
* default radius is 5.0.
*
* Supported elements types are {@link Element#U8},
* {@link Element#U8_4}.
*
* @param rs The RenderScript context
* @param e Element type for inputs and outputs
*
* @return ScriptIntrinsicBlur
*/
public static ScriptIntrinsicBlur create(RenderScript rs, Element e) {
if ((!e.isCompatible(Element.U8_4(rs))) && (!e.isCompatible(Element.U8(rs)))) {
throw new RSIllegalArgumentException("Unsupported element type.");
}
long id = rs.nScriptIntrinsicCreate(5, e.getID(rs));
ScriptIntrinsicBlur sib = new ScriptIntrinsicBlur(id, rs);
sib.setRadius(5.f);
return sib;
}
/**
* Set the input of the blur.
* Must match the element type supplied during create.
*
* @param ain The input allocation
*/
public void setInput(Allocation ain) {
if (ain.getType().getY() == 0) {
throw new RSIllegalArgumentException("Input set to a 1D Allocation");
}
mInput = ain;
setVar(1, ain);
}
/**
* Set the radius of the Blur.
*
* Supported range 0 < radius <= 25
*
* @param radius The radius of the blur
*/
public void setRadius(float radius) {
if (radius <= 0 || radius > 25) {
throw new RSIllegalArgumentException("Radius out of range (0 < r <= 25).");
}
setVar(0, radius);
}
/**
* 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) {
if (aout.getType().getY() == 0) {
throw new RSIllegalArgumentException("Output is a 1D Allocation");
}
forEach(0, (Allocation) null, aout, null);
}
/**
* Apply the filter to the input and save to the specified
* allocation.
*
* @param aout Output allocation. Must match creation element
* type.
* @param opt LaunchOptions for clipping
*/
public void forEach(Allocation aout, Script.LaunchOptions opt) {
if (aout.getType().getY() == 0) {
throw new RSIllegalArgumentException("Output is a 1D Allocation");
}
forEach(0, (Allocation) null, aout, null, opt);
}
/**
* Get a KernelID for this intrinsic kernel.
*
* @return Script.KernelID The KernelID object.
*/
public Script.KernelID getKernelID() {
return createKernelID(0, 2, null, null);
}
/**
* Get a FieldID for the input field of this intrinsic.
*
* @return Script.FieldID The FieldID object.
*/
public Script.FieldID getFieldID_Input() {
return createFieldID(1, null);
}
}
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