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(int 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 != Element.U8_4(rs)) {
50            throw new RSIllegalArgumentException("Unsuported element type.");
51        }
52        int 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