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 5x5 convolve to an allocation.
23 *
24 **/
25public final class ScriptIntrinsicConvolve5x5 extends ScriptIntrinsic {
26    private final float[] mValues = new float[25];
27    private Allocation mInput;
28
29    private ScriptIntrinsicConvolve5x5(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     * <code>
38     * <p> [ 0,  0,  0,  0,  0  ]
39     * <p> [ 0,  0,  0,  0,  0  ]
40     * <p> [ 0,  0,  1,  0,  0  ]
41     * <p> [ 0,  0,  0,  0,  0  ]
42     * <p> [ 0,  0,  0,  0,  0  ]
43     * </code>
44     *
45     * @param rs The Renderscript context
46     * @param e Element type for intputs and outputs
47     *
48     * @return ScriptIntrinsicConvolve5x5
49     */
50    public static ScriptIntrinsicConvolve5x5 create(RenderScript rs, Element e) {
51        int id = rs.nScriptIntrinsicCreate(4, e.getID(rs));
52        return new ScriptIntrinsicConvolve5x5(id, rs);
53
54    }
55
56    /**
57     * Set the input of the blur.
58     * Must match the element type supplied during create.
59     *
60     * @param ain The input allocation.
61     */
62    public void setInput(Allocation ain) {
63        mInput = ain;
64        bindAllocation(ain, 1);
65    }
66
67    /**
68    * Set the coefficients for the convolve.
69    *
70    * The convolve layout is
71    * <code>
72    * <p> [ 0,  1,  2,  3,  4  ]
73    * <p> [ 5,  6,  7,  8,  9  ]
74    * <p> [ 10, 11, 12, 13, 14 ]
75    * <p> [ 15, 16, 17, 18, 19 ]
76    * <p> [ 20, 21, 22, 23, 24 ]
77    * </code>
78    *
79    * @param v The array of coefficients to set
80    */
81    public void setCoefficients(float v[]) {
82        FieldPacker fp = new FieldPacker(25*4);
83        for (int ct=0; ct < mValues.length; ct++) {
84            mValues[ct] = v[ct];
85            fp.addF32(mValues[ct]);
86        }
87        setVar(0, fp);
88    }
89
90    /**
91     * Apply the filter to the input and save to the specified
92     * allocation.
93     *
94     * @param aout Output allocation. Must match creation element
95     *             type.
96     */
97    public void forEach(Allocation aout) {
98        forEach(0, null, aout, null);
99    }
100
101    /**
102     * Get a KernelID for this intrinsic kernel.
103     *
104     * @return Script.KernelID The KernelID object.
105     */
106    public Script.KernelID getKernelID() {
107        return createKernelID(0, 2, null, null);
108    }
109
110    /**
111     * Get a FieldID for the input field of this intrinsic.
112     *
113     * @return Script.FieldID The FieldID object.
114     */
115    public Script.FieldID getFieldID_Input() {
116        return createFieldID(1, null);
117    }
118}
119
120