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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.rs.image)
#pragma rs_fp_relaxed
int32_t gWidth;
int32_t gHeight;
rs_allocation gIn;
float gCoeffs[25];
void root(uchar4 *out, uint32_t x, uint32_t y) {
uint32_t x0 = max((int32_t)x-2, 0);
uint32_t x1 = max((int32_t)x-1, 0);
uint32_t x2 = x;
uint32_t x3 = min((int32_t)x+1, gWidth-1);
uint32_t x4 = min((int32_t)x+2, gWidth-1);
uint32_t y0 = max((int32_t)y-2, 0);
uint32_t y1 = max((int32_t)y-1, 0);
uint32_t y2 = y;
uint32_t y3 = min((int32_t)y+1, gHeight-1);
uint32_t y4 = min((int32_t)y+2, gHeight-1);
float4 p0 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y0)) * gCoeffs[0]
+ convert_float4(rsGetElementAt_uchar4(gIn, x1, y0)) * gCoeffs[1]
+ convert_float4(rsGetElementAt_uchar4(gIn, x2, y0)) * gCoeffs[2]
+ convert_float4(rsGetElementAt_uchar4(gIn, x3, y0)) * gCoeffs[3]
+ convert_float4(rsGetElementAt_uchar4(gIn, x4, y0)) * gCoeffs[4];
float4 p1 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y1)) * gCoeffs[5]
+ convert_float4(rsGetElementAt_uchar4(gIn, x1, y1)) * gCoeffs[6]
+ convert_float4(rsGetElementAt_uchar4(gIn, x2, y1)) * gCoeffs[7]
+ convert_float4(rsGetElementAt_uchar4(gIn, x3, y1)) * gCoeffs[8]
+ convert_float4(rsGetElementAt_uchar4(gIn, x4, y1)) * gCoeffs[9];
float4 p2 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y2)) * gCoeffs[10]
+ convert_float4(rsGetElementAt_uchar4(gIn, x1, y2)) * gCoeffs[11]
+ convert_float4(rsGetElementAt_uchar4(gIn, x2, y2)) * gCoeffs[12]
+ convert_float4(rsGetElementAt_uchar4(gIn, x3, y2)) * gCoeffs[13]
+ convert_float4(rsGetElementAt_uchar4(gIn, x4, y2)) * gCoeffs[14];
float4 p3 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y3)) * gCoeffs[15]
+ convert_float4(rsGetElementAt_uchar4(gIn, x1, y3)) * gCoeffs[16]
+ convert_float4(rsGetElementAt_uchar4(gIn, x2, y3)) * gCoeffs[17]
+ convert_float4(rsGetElementAt_uchar4(gIn, x3, y3)) * gCoeffs[18]
+ convert_float4(rsGetElementAt_uchar4(gIn, x4, y3)) * gCoeffs[19];
float4 p4 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y4)) * gCoeffs[20]
+ convert_float4(rsGetElementAt_uchar4(gIn, x1, y4)) * gCoeffs[21]
+ convert_float4(rsGetElementAt_uchar4(gIn, x2, y4)) * gCoeffs[22]
+ convert_float4(rsGetElementAt_uchar4(gIn, x3, y4)) * gCoeffs[23]
+ convert_float4(rsGetElementAt_uchar4(gIn, x4, y4)) * gCoeffs[24];
p0 = clamp(p0 + p1 + p2 + p3 + p4, 0.f, 255.f);
*out = convert_uchar4(p0);
}
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