ScriptIntrinsicBlur.java revision 355707e4f665904e31d9f5fcff1e3921f7db8cdd
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.renderscript; 18 19import android.content.Context; 20import android.content.res.Resources; 21import android.util.Log; 22 23/** 24 * Intrinsic Gausian blur filter. Applies a gaussian blur of the 25 * specified radius to all elements of an allocation. 26 * 27 * 28 **/ 29public final class ScriptIntrinsicBlur extends ScriptIntrinsic { 30 private final float[] mValues = new float[9]; 31 private Allocation mInput; 32 33 private ScriptIntrinsicBlur(long id, RenderScript rs) { 34 super(id, rs); 35 } 36 37 /** 38 * Create an intrinsic for applying a blur to an allocation. The 39 * default radius is 5.0. 40 * 41 * Supported elements types are {@link Element#U8_4} 42 * 43 * @param rs The RenderScript context 44 * @param e Element type for inputs and outputs 45 * 46 * @return ScriptIntrinsicBlur 47 */ 48 public static ScriptIntrinsicBlur create(RenderScript rs, Element e) { 49 if ((!e.isCompatible(Element.U8_4(rs))) && (!e.isCompatible(Element.U8(rs)))) { 50 throw new RSIllegalArgumentException("Unsuported element type."); 51 } 52 long id = rs.nScriptIntrinsicCreate(5, e.getID(rs)); 53 ScriptIntrinsicBlur sib = new ScriptIntrinsicBlur(id, rs); 54 sib.setRadius(5.f); 55 return sib; 56 } 57 58 /** 59 * Set the input of the blur. 60 * Must match the element type supplied during create. 61 * 62 * @param ain The input allocation 63 */ 64 public void setInput(Allocation ain) { 65 mInput = ain; 66 setVar(1, ain); 67 } 68 69 /** 70 * Set the radius of the Blur. 71 * 72 * Supported range 0 < radius <= 25 73 * 74 * @param radius The radius of the blur 75 */ 76 public void setRadius(float radius) { 77 if (radius <= 0 || radius > 25) { 78 throw new RSIllegalArgumentException("Radius out of range (0 < r <= 25)."); 79 } 80 setVar(0, radius); 81 } 82 83 /** 84 * Apply the filter to the input and save to the specified 85 * allocation. 86 * 87 * @param aout Output allocation. Must match creation element 88 * type. 89 */ 90 public void forEach(Allocation aout) { 91 forEach(0, null, aout, null); 92 } 93 94 /** 95 * Get a KernelID for this intrinsic kernel. 96 * 97 * @return Script.KernelID The KernelID object. 98 */ 99 public Script.KernelID getKernelID() { 100 return createKernelID(0, 2, null, null); 101 } 102 103 /** 104 * Get a FieldID for the input field of this intrinsic. 105 * 106 * @return Script.FieldID The FieldID object. 107 */ 108 public Script.FieldID getFieldID_Input() { 109 return createFieldID(1, null); 110 } 111} 112 113