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 *
23 * Intrinsic for converting RGB to RGBA by using a 3D lookup table.  The
24 * incoming r,g,b values are use as normalized x,y,z coordinates into a 3D
25 * allocation.  The 8 nearest values are sampled and linearly interpolated.  The
26 * result is placed in the output.
27 *
28 **/
29public class ScriptIntrinsic3DLUT extends ScriptIntrinsic {
30    private Allocation mLUT;
31    private Element mElement;
32    // API level for the intrinsic
33    private static final int INTRINSIC_API_LEVEL = 19;
34
35    protected ScriptIntrinsic3DLUT(long id, RenderScript rs, Element e) {
36        super(id, rs);
37        mElement = e;
38    }
39
40    /**
41     * Supported elements types are {@link Element#U8_4}
42     *
43     * The defaults tables are identity.
44     *
45     * @param rs The RenderScript context
46     * @param e Element type for intputs and outputs
47     *
48     * @return ScriptIntrinsic3DLUT
49     */
50    public static ScriptIntrinsic3DLUT create(RenderScript rs, Element e) {
51        if (!e.isCompatible(Element.U8_4(rs))) {
52            throw new RSIllegalArgumentException("Element must be compatible with uchar4.");
53        }
54        long id;
55        boolean mUseIncSupp = rs.isUseNative() &&
56                              android.os.Build.VERSION.SDK_INT < INTRINSIC_API_LEVEL;
57
58        id = rs.nScriptIntrinsicCreate(8, e.getID(rs), mUseIncSupp);
59
60        ScriptIntrinsic3DLUT si = new ScriptIntrinsic3DLUT(id, rs, e);
61        si.setIncSupp(mUseIncSupp);
62        return si;
63    }
64
65    /**
66     * Sets the {@link android.support.v8.renderscript.Allocation} to be used as
67     * the lookup table.
68     *
69     * The lookup table must use the same
70     * {@link android.support.v8.renderscript.Element} as the intrinsic.
71     *
72     */
73
74    public void setLUT(Allocation lut) {
75        final Type t = lut.getType();
76
77        if (t.getZ() == 0) {
78            throw new RSIllegalArgumentException("LUT must be 3d.");
79        }
80
81        if (!t.getElement().isCompatible(mElement)) {
82            throw new RSIllegalArgumentException("LUT element type must match.");
83        }
84
85        mLUT = lut;
86        setVar(0, mLUT);
87    }
88
89
90    /**
91     * Invoke the kernel and apply the lookup to each cell of ain
92     * and copy to aout.
93     *
94     * @param ain Input allocation
95     * @param aout Output allocation
96     */
97    public void forEach(Allocation ain, Allocation aout) {
98        forEach(0, ain, 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, 3, null, null);
108    }
109}
110
111