| /* |
| * 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. |
| */ |
| |
| #pragma version(1) |
| #pragma rs java_package_name(com.android.gallery3d.filtershow.filters) |
| #pragma rs_fp_relaxed |
| |
| int32_t gWidth; |
| int32_t gHeight; |
| const uchar4 *gPixels; |
| rs_allocation gIn; |
| |
| float gCoeffs[9]; |
| |
| void root(const uchar4 *in, uchar4 *out, const void *usrData, uint32_t x, uint32_t y) { |
| uint32_t x1 = min((int32_t)x+1, gWidth-1); |
| uint32_t x2 = max((int32_t)x-1, 0); |
| uint32_t y1 = min((int32_t)y+1, gHeight-1); |
| uint32_t y2 = max((int32_t)y-1, 0); |
| |
| float4 p00 = rsUnpackColor8888(gPixels[x1 + gWidth * y1]); |
| float4 p01 = rsUnpackColor8888(gPixels[x + gWidth * y1]); |
| float4 p02 = rsUnpackColor8888(gPixels[x2 + gWidth * y1]); |
| float4 p10 = rsUnpackColor8888(gPixels[x1 + gWidth * y]); |
| float4 p11 = rsUnpackColor8888(gPixels[x + gWidth * y]); |
| float4 p12 = rsUnpackColor8888(gPixels[x2 + gWidth * y]); |
| float4 p20 = rsUnpackColor8888(gPixels[x1 + gWidth * y2]); |
| float4 p21 = rsUnpackColor8888(gPixels[x + gWidth * y2]); |
| float4 p22 = rsUnpackColor8888(gPixels[x2 + gWidth * y2]); |
| |
| p00 *= gCoeffs[0]; |
| p01 *= gCoeffs[1]; |
| p02 *= gCoeffs[2]; |
| p10 *= gCoeffs[3]; |
| p11 *= gCoeffs[4]; |
| p12 *= gCoeffs[5]; |
| p20 *= gCoeffs[6]; |
| p21 *= gCoeffs[7]; |
| p22 *= gCoeffs[8]; |
| |
| p00 += p01; |
| p02 += p10; |
| p11 += p12; |
| p20 += p21; |
| |
| p22 += p00; |
| p02 += p11; |
| |
| p20 += p22; |
| p20 += p02; |
| |
| p20 = clamp(p20, 0.f, 1.f); |
| *out = rsPackColorTo8888(p20.r, p20.g, p20.b); |
| } |