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 
17 package androidx.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  */
27 public class ScriptIntrinsicYuvToRGB extends ScriptIntrinsic {
28     private Allocation mInput;
29     // API level for the intrinsic
30     private static final int INTRINSIC_API_LEVEL = 19;
31 
ScriptIntrinsicYuvToRGB(long id, RenderScript rs)32     ScriptIntrinsicYuvToRGB(long id, RenderScript rs) {
33         super(id, rs);
34     }
35 
36     /**
37      * Create an intrinsic for converting YUV to RGB.
38      *
39      * Supported elements types are {@link Element#U8_4}
40      *
41      * @param rs The RenderScript context
42      * @param e Element type for output
43      *
44      * @return ScriptIntrinsicYuvToRGB
45      */
create(RenderScript rs, Element e)46     public static ScriptIntrinsicYuvToRGB create(RenderScript rs, Element e) {
47         // 6 comes from RS_SCRIPT_INTRINSIC_YUV_TO_RGB in rsDefines.h
48         long id;
49         boolean mUseIncSupp = rs.isUseNative() &&
50                               android.os.Build.VERSION.SDK_INT < INTRINSIC_API_LEVEL;
51 
52         id = rs.nScriptIntrinsicCreate(6, e.getID(rs), mUseIncSupp);
53 
54         ScriptIntrinsicYuvToRGB si = new ScriptIntrinsicYuvToRGB(id, rs);
55         si.setIncSupp(mUseIncSupp);
56         return si;
57     }
58 
59 
60     /**
61      * Set the input yuv allocation, must be {@link Element#U8}.
62      *
63      * @param ain The input allocation.
64      */
65     public void setInput(Allocation ain) {
66         mInput = ain;
67         setVar(0, ain);
68     }
69 
70     /**
71      * Convert the image to RGB.
72      *
73      * @param aout Output allocation. Must match creation element
74      *             type.
75      */
76     public void forEach(Allocation aout) {
77         forEach(0, (Allocation) null, aout, null);
78     }
79 
80     /**
81      * Get a KernelID for this intrinsic kernel.
82      *
83      * @return Script.KernelID The KernelID object.
84      */
85     public Script.KernelID getKernelID() {
86         return createKernelID(0, 2, null, null);
87     }
88 
89     /**
90      * Get a FieldID for the input field of this intrinsic.
91      *
92      * @return Script.FieldID The FieldID object.
93      */
94     public Script.FieldID getFieldID_Input() {
95         return createFieldID(0, null);
96     }
97 }
98