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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 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 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     /**
     59      * Sets the {@link android.renderscript.Allocation} to be used as the lookup table.
     60      *
     61      * The lookup table must use the same {@link android.renderscript.Element} as the intrinsic.
     62      *
     63      */
     64 
     65     public void setLUT(Allocation lut) {
     66         final Type t = lut.getType();
     67 
     68         if (t.getZ() == 0) {
     69             throw new RSIllegalArgumentException("LUT must be 3d.");
     70         }
     71 
     72         if (!t.getElement().isCompatible(mElement)) {
     73             throw new RSIllegalArgumentException("LUT element type must match.");
     74         }
     75 
     76         mLUT = lut;
     77         setVar(0, mLUT);
     78     }
     79 
     80 
     81     /**
     82      * Invoke the kernel and apply the lookup to each cell of ain
     83      * and copy to aout.
     84      *
     85      * @param ain Input allocation
     86      * @param aout Output allocation
     87      */
     88     public void forEach(Allocation ain, Allocation aout) {
     89         forEach(0, ain, aout, null);
     90     }
     91 
     92     /**
     93      * Get a KernelID for this intrinsic kernel.
     94      *
     95      * @return Script.KernelID The KernelID object.
     96      */
     97     public Script.KernelID getKernelID() {
     98         return createKernelID(0, 3, null, null);
     99     }
    100 }
    101 
    102