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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 RGB to RGBA by using a 3D lookup table.  The
     22  * incoming r,g,b values are use as normalized x,y,z coordinates into a 3D
     23  * allocation.  The 8 nearest values are sampled and linearly interpolated.  The
     24  * result is placed in the output.
     25  *
     26  **/
     27 public final class ScriptIntrinsic3DLUT extends ScriptIntrinsic {
     28     private Allocation mLUT;
     29     private Element mElement;
     30 
     31     private ScriptIntrinsic3DLUT(long id, RenderScript rs, Element e) {
     32         super(id, rs);
     33         mElement = e;
     34     }
     35 
     36     /**
     37      * Supported elements types are {@link Element#U8_4}
     38      *
     39      * The defaults tables are identity.
     40      *
     41      * @param rs The RenderScript context
     42      * @param e Element type for intputs and outputs
     43      *
     44      * @return ScriptIntrinsic3DLUT
     45      */
     46     public static ScriptIntrinsic3DLUT create(RenderScript rs, Element e) {
     47         long id = rs.nScriptIntrinsicCreate(8, e.getID(rs));
     48 
     49         if (!e.isCompatible(Element.U8_4(rs))) {
     50             throw new RSIllegalArgumentException("Element must be compatible with uchar4.");
     51         }
     52 
     53         return new ScriptIntrinsic3DLUT(id, rs, e);
     54     }
     55 
     56     /**
     57      * Sets the {@link android.renderscript.Allocation} to be used as the lookup table.
     58      *
     59      * The lookup table must use the same {@link android.renderscript.Element} as the intrinsic.
     60      *
     61      */
     62 
     63     public void setLUT(Allocation lut) {
     64         final Type t = lut.getType();
     65 
     66         if (t.getZ() == 0) {
     67             throw new RSIllegalArgumentException("LUT must be 3d.");
     68         }
     69 
     70         if (!t.getElement().isCompatible(mElement)) {
     71             throw new RSIllegalArgumentException("LUT element type must match.");
     72         }
     73 
     74         mLUT = lut;
     75         setVar(0, mLUT);
     76     }
     77 
     78 
     79     /**
     80      * Invoke the kernel and apply the lookup to each cell of ain
     81      * and copy to aout.
     82      *
     83      * @param ain Input allocation
     84      * @param aout Output allocation
     85      */
     86     public void forEach(Allocation ain, Allocation aout) {
     87         forEach(ain, aout, null);
     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      * @param opt Launch options for kernel
     97      */
     98     public void forEach(Allocation ain, Allocation aout, Script.LaunchOptions opt) {
     99         forEach(0, ain, aout, null, opt);
    100     }
    101 
    102 
    103     /**
    104      * Get a KernelID for this intrinsic kernel.
    105      *
    106      * @return Script.KernelID The KernelID object.
    107      */
    108     public Script.KernelID getKernelID() {
    109         return createKernelID(0, 3, null, null);
    110     }
    111 }
    112 
    113