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      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 android.renderscript;
     18 
     19 
     20 /**
     21  * Intrinsic for converting an Android YUV buffer to RGB.
     22  *
     23  * The input allocation should be supplied in a supported YUV format
     24  * as a YUV element Allocation. The output is RGBA; the alpha channel
     25  * will be set to 255.
     26  */
     27 public final class ScriptIntrinsicYuvToRGB extends ScriptIntrinsic {
     28     private Allocation mInput;
     29 
     30     ScriptIntrinsicYuvToRGB(long 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         // 6 comes from RS_SCRIPT_INTRINSIC_YUV_TO_RGB in rsDefines.h
     46         long id = rs.nScriptIntrinsicCreate(6, e.getID(rs));
     47         ScriptIntrinsicYuvToRGB si = new ScriptIntrinsicYuvToRGB(id, rs);
     48         return si;
     49     }
     50 
     51 
     52     /**
     53      * Set the input yuv allocation, must be {@link Element#U8}.
     54      *
     55      * @param ain The input allocation.
     56      */
     57     public void setInput(Allocation ain) {
     58         mInput = ain;
     59         setVar(0, ain);
     60     }
     61 
     62     /**
     63      * Convert the image to RGB.
     64      *
     65      * @param aout Output allocation. Must match creation element
     66      *             type.
     67      */
     68     public void forEach(Allocation aout) {
     69         forEach(0, (Allocation) null, aout, null);
     70     }
     71 
     72     /**
     73      * Get a KernelID for this intrinsic kernel.
     74      *
     75      * @return Script.KernelID The KernelID object.
     76      */
     77     public Script.KernelID getKernelID() {
     78         return createKernelID(0, 2, null, null);
     79     }
     80 
     81     /**
     82      * Get a FieldID for the input field of this intrinsic.
     83      *
     84      * @return Script.FieldID The FieldID object.
     85      */
     86     public Script.FieldID getFieldID_Input() {
     87         return createFieldID(0, null);
     88     }
     89 }
     90