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
19
20/**
21 * Intrinsic for converting an Android YUV buffer to RGB.
22 *
23 * The input allocation is supplied in NV21 format as a U8
24 * element type. The output is RGBA, the alpha channel will be
25 * set to 255.
26 */
27public class ScriptIntrinsicYuvToRGB extends ScriptIntrinsic {
28    private Allocation mInput;
29
30    ScriptIntrinsicYuvToRGB(int id, RenderScript rs) {
31        super(id, rs);
32    }
33
34    /**
35     * Create an intrinsic for converting YUV to RGB.
36     *
37     * Supported elements types are {@link Element#U8_4}
38     *
39     * @param rs The RenderScript context
40     * @param e Element type for output
41     *
42     * @return ScriptIntrinsicYuvToRGB
43     */
44    public static ScriptIntrinsicYuvToRGB create(RenderScript rs, Element e) {
45        if (rs.isNative) {
46            RenderScriptThunker rst = (RenderScriptThunker) rs;
47            return ScriptIntrinsicYuvToRGBThunker.create(rs, e);
48        }
49
50        // 6 comes from RS_SCRIPT_INTRINSIC_YUV_TO_RGB in rsDefines.h
51        int id = rs.nScriptIntrinsicCreate(6, e.getID(rs));
52        ScriptIntrinsicYuvToRGB si = new ScriptIntrinsicYuvToRGB(id, rs);
53        return si;
54    }
55
56
57    /**
58     * Set the input yuv allocation, must be {@link Element#U8}.
59     *
60     * @param ain The input allocation.
61     */
62    public void setInput(Allocation ain) {
63        mInput = ain;
64        setVar(0, ain);
65    }
66
67    /**
68     * Convert the image to RGB.
69     *
70     * @param aout Output allocation. Must match creation element
71     *             type.
72     */
73    public void forEach(Allocation aout) {
74        forEach(0, null, aout, null);
75    }
76
77    /**
78     * Get a KernelID for this intrinsic kernel.
79     *
80     * @return Script.KernelID The KernelID object.
81     */
82    public Script.KernelID getKernelID() {
83        return createKernelID(0, 2, null, null);
84    }
85
86    /**
87     * Get a FieldID for the input field of this intrinsic.
88     *
89     * @return Script.FieldID The FieldID object.
90     */
91    public Script.FieldID getFieldID_Input() {
92        return createFieldID(0, null);
93    }
94}
95