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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.
*/
#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);
}
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