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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ip.rsh"
#pragma rs_fp_relaxed
static rs_allocation gCube;
static int4 gDims;
static int4 gCoordMul;
void setCube(rs_allocation c) {
gCube = c;
gDims.x = rsAllocationGetDimX(gCube);
gDims.y = rsAllocationGetDimY(gCube);
gDims.z = rsAllocationGetDimZ(gCube);
gDims.w = 0;
float4 m = (float4)(1.f / 255.f) * convert_float4(gDims - 1);
gCoordMul = convert_int4(m * (float4)0x10000);
}
uchar4 RS_KERNEL root(uchar4 in) {
int4 baseCoord = convert_int4(in) * gCoordMul;
int4 coord1 = baseCoord >> (int4)16;
int4 coord2 = min(coord1 + 1, gDims - 1);
int4 weight2 = baseCoord & 0xffff;
int4 weight1 = (int4)0x10000 - weight2;
uint4 v000 = convert_uint4(rsGetElementAt_uchar4(gCube, coord1.x, coord1.y, coord1.z));
uint4 v100 = convert_uint4(rsGetElementAt_uchar4(gCube, coord2.x, coord1.y, coord1.z));
uint4 v010 = convert_uint4(rsGetElementAt_uchar4(gCube, coord1.x, coord2.y, coord1.z));
uint4 v110 = convert_uint4(rsGetElementAt_uchar4(gCube, coord2.x, coord2.y, coord1.z));
uint4 v001 = convert_uint4(rsGetElementAt_uchar4(gCube, coord1.x, coord1.y, coord2.z));
uint4 v101 = convert_uint4(rsGetElementAt_uchar4(gCube, coord2.x, coord1.y, coord2.z));
uint4 v011 = convert_uint4(rsGetElementAt_uchar4(gCube, coord1.x, coord2.y, coord2.z));
uint4 v111 = convert_uint4(rsGetElementAt_uchar4(gCube, coord2.x, coord2.y, coord2.z));
uint4 yz00 = ((v000 * weight1.x) + (v100 * weight2.x)) >> (uint4)8;
uint4 yz10 = ((v010 * weight1.x) + (v110 * weight2.x)) >> (uint4)8;
uint4 yz01 = ((v001 * weight1.x) + (v101 * weight2.x)) >> (uint4)8;
uint4 yz11 = ((v011 * weight1.x) + (v111 * weight2.x)) >> (uint4)8;
uint4 z0 = ((yz00 * weight1.y) + (yz10 * weight2.y)) >> (uint4)16;
uint4 z1 = ((yz01 * weight1.y) + (yz11 * weight2.y)) >> (uint4)16;
uint4 v = ((z0 * weight1.z) + (z1 * weight2.z)) >> (uint4)16;
uint4 v2 = (v + 0x7f) >> (uint4)8;
uchar4 o = convert_uchar4(v2);
o.a = 0xff;
return o;
}
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