ScriptIntrinsicConvolve3x3.java revision 099deb8fb1715e62bcb24513f8e9305ab4f7743a 
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.support.v8.renderscript;
18
19import android.util.Log;
20
21/**
22 * Intrinsic for applying a 3x3 convolve to an allocation.
23 *
24 **/
25public class ScriptIntrinsicConvolve3x3 extends ScriptIntrinsic {
26    private final float[] mValues = new float[9];
27    private Allocation mInput;
28
29    ScriptIntrinsicConvolve3x3(int id, RenderScript rs) {
30        super(id, rs);
31    }
32
33    /**
34     * Supported elements types are {@link Element#U8_4}
35     *
36     * The default coefficients are.
37     *
38     * <code>
39     * <p> [ 0,  0,  0 ]
40     * <p> [ 0,  1,  0 ]
41     * <p> [ 0,  0,  0 ]
42     * </code>
43     *
44     * @param rs The Renderscript context
45     * @param e Element type for intputs and outputs
46     *
47     * @return ScriptIntrinsicConvolve3x3
48     */
49    public static ScriptIntrinsicConvolve3x3 create(RenderScript rs, Element e) {
50        if (rs.isNative) {
51            RenderScriptThunker rst = (RenderScriptThunker) rs;
52            return ScriptIntrinsicConvolve3x3Thunker.create(rs, e);
53        }
54
55        float f[] = { 0, 0, 0, 0, 1, 0, 0, 0, 0};
56        if (!e.isCompatible(Element.U8_4(rs))) {
57            throw new RSIllegalArgumentException("Unsuported element type.");
58        }
59        int id = rs.nScriptIntrinsicCreate(1, e.getID(rs));
60        ScriptIntrinsicConvolve3x3 si = new ScriptIntrinsicConvolve3x3(id, rs);
61        si.setCoefficients(f);
62        return si;
63
64    }
65
66    /**
67     * Set the input of the blur.
68     * Must match the element type supplied during create.
69     *
70     * @param ain The input allocation.
71     */
72    public void setInput(Allocation ain) {
73        mInput = ain;
74        setVar(1, ain);
75    }
76
77    /**
78     * Set the coefficients for the convolve.
79     *
80     * The convolve layout is
81     * <code>
82     * <p> [ 0,  1,  2 ]
83     * <p> [ 3,  4,  5 ]
84     * <p> [ 6,  7,  8 ]
85     * </code>
86     *
87     * @param v The array of coefficients to set
88     */
89    public void setCoefficients(float v[]) {
90        FieldPacker fp = new FieldPacker(9*4);
91        for (int ct=0; ct < mValues.length; ct++) {
92            mValues[ct] = v[ct];
93            fp.addF32(mValues[ct]);
94        }
95        setVar(0, fp);
96    }
97
98    /**
99     * Apply the filter to the input and save to the specified
100     * allocation.
101     *
102     * @param aout Output allocation. Must match creation element
103     *             type.
104     */
105    public void forEach(Allocation aout) {
106        forEach(0, null, aout, null);
107    }
108
109    /**
110     * Get a KernelID for this intrinsic kernel.
111     *
112     * @return Script.KernelID The KernelID object.
113     */
114    public Script.KernelID getKernelID() {
115        return createKernelID(0, 2, null, null);
116    }
117
118    /**
119     * Get a FieldID for the input field of this intrinsic.
120     *
121     * @return Script.FieldID The FieldID object.
122     */
123    public Script.FieldID getFieldID_Input() {
124        return createFieldID(1, null);
125    }
126
127}
128
129