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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 androidx.renderscript;
     18 
     19 import 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  **/
     29 public 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 androidx.renderscript.Allocation} to be used as
     67      * the lookup table.
     68      *
     69      * The lookup table must use the same
     70      * {@link androidx.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