ScriptIntrinsic3DLUT.java revision 02d56d90e01e20db8424de94a14fe59dc94f19c0 
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.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 final class ScriptIntrinsic3DLUT extends ScriptIntrinsic {
30    private Allocation mLUT;
31    private Element mElement;
32
33    private ScriptIntrinsic3DLUT(int id, RenderScript rs, Element e) {
34        super(id, rs);
35        mElement = e;
36    }
37
38    /**
39     * Supported elements types are {@link Element#U8_4}
40     *
41     * The defaults tables are identity.
42     *
43     * @param rs The Renderscript context
44     * @param e Element type for intputs and outputs
45     *
46     * @return ScriptIntrinsic3DLUT
47     */
48    public static ScriptIntrinsic3DLUT create(RenderScript rs, Element e) {
49        int id = rs.nScriptIntrinsicCreate(8, e.getID(rs));
50
51        if (!e.isCompatible(Element.U8_4(rs))) {
52            throw new RSIllegalArgumentException("Element must be compatible with uchar4.");
53        }
54
55        return new ScriptIntrinsic3DLUT(id, rs, e);
56    }
57
58    public void setLUT(Allocation lut) {
59        final Type t = lut.getType();
60
61        if (t.getZ() == 0) {
62            throw new RSIllegalArgumentException("LUT must be 3d.");
63        }
64
65        if (!t.getElement().isCompatible(mElement)) {
66            throw new RSIllegalArgumentException("LUT element type must match.");
67        }
68
69        mLUT = lut;
70        setVar(0, mLUT);
71    }
72
73
74    /**
75     * Invoke the kernel and apply the lookup to each cell of ain
76     * and copy to aout.
77     *
78     * @param ain Input allocation
79     * @param aout Output allocation
80     */
81    public void forEach(Allocation ain, Allocation aout) {
82        forEach(0, ain, aout, null);
83    }
84
85    /**
86     * Get a KernelID for this intrinsic kernel.
87     *
88     * @return Script.KernelID The KernelID object.
89     */
90    public Script.KernelID getKernelID() {
91        return createKernelID(0, 3, null, null);
92    }
93}
94
95