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 17 package android.renderscript; 18 19 /** 20 * Intrinsic Gausian blur filter. Applies a gaussian blur of the 21 * specified radius to all elements of an allocation. 22 * 23 * 24 **/ 25 public final class ScriptIntrinsicBlur extends ScriptIntrinsic { 26 private final float[] mValues = new float[9]; 27 private Allocation mInput; 28 ScriptIntrinsicBlur(long id, RenderScript rs)29 private ScriptIntrinsicBlur(long id, RenderScript rs) { 30 super(id, rs); 31 } 32 33 /** 34 * Create an intrinsic for applying a blur to an allocation. The 35 * default radius is 5.0. 36 * 37 * Supported elements types are {@link Element#U8}, 38 * {@link Element#U8_4}. 39 * 40 * @param rs The RenderScript context 41 * @param e Element type for inputs and outputs 42 * 43 * @return ScriptIntrinsicBlur 44 */ create(RenderScript rs, Element e)45 public static ScriptIntrinsicBlur create(RenderScript rs, Element e) { 46 if ((!e.isCompatible(Element.U8_4(rs))) && (!e.isCompatible(Element.U8(rs)))) { 47 throw new RSIllegalArgumentException("Unsupported element type."); 48 } 49 long id = rs.nScriptIntrinsicCreate(5, e.getID(rs)); 50 ScriptIntrinsicBlur sib = new ScriptIntrinsicBlur(id, rs); 51 sib.setRadius(5.f); 52 return sib; 53 } 54 55 /** 56 * Set the input of the blur. 57 * Must match the element type supplied during create. 58 * 59 * @param ain The input allocation 60 */ setInput(Allocation ain)61 public void setInput(Allocation ain) { 62 if (ain.getType().getY() == 0) { 63 throw new RSIllegalArgumentException("Input set to a 1D Allocation"); 64 } 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 */ setRadius(float radius)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 */ forEach(Allocation aout)90 public void forEach(Allocation aout) { 91 if (aout.getType().getY() == 0) { 92 throw new RSIllegalArgumentException("Output is a 1D Allocation"); 93 } 94 forEach(0, (Allocation) null, aout, null); 95 } 96 97 /** 98 * Apply the filter to the input and save to the specified 99 * allocation. 100 * 101 * @param aout Output allocation. Must match creation element 102 * type. 103 * @param opt LaunchOptions for clipping 104 */ forEach(Allocation aout, Script.LaunchOptions opt)105 public void forEach(Allocation aout, Script.LaunchOptions opt) { 106 if (aout.getType().getY() == 0) { 107 throw new RSIllegalArgumentException("Output is a 1D Allocation"); 108 } 109 forEach(0, (Allocation) null, aout, null, opt); 110 } 111 112 113 /** 114 * Get a KernelID for this intrinsic kernel. 115 * 116 * @return Script.KernelID The KernelID object. 117 */ getKernelID()118 public Script.KernelID getKernelID() { 119 return createKernelID(0, 2, null, null); 120 } 121 122 /** 123 * Get a FieldID for the input field of this intrinsic. 124 * 125 * @return Script.FieldID The FieldID object. 126 */ getFieldID_Input()127 public Script.FieldID getFieldID_Input() { 128 return createFieldID(1, null); 129 } 130 } 131