| /* |
| * 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; |
| } |
| |