1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#pragma version(1) 18#pragma rs java_package_name(com.android.rs.image) 19#pragma rs_fp_relaxed 20 21int32_t gWidth; 22int32_t gHeight; 23rs_allocation gIn; 24 25float gCoeffs[25]; 26 27uchar4 __attribute__((kernel)) root(uint32_t x, uint32_t y) { 28 uint32_t x0 = max((int32_t)x-2, 0); 29 uint32_t x1 = max((int32_t)x-1, 0); 30 uint32_t x2 = x; 31 uint32_t x3 = min((int32_t)x+1, gWidth-1); 32 uint32_t x4 = min((int32_t)x+2, gWidth-1); 33 34 uint32_t y0 = max((int32_t)y-2, 0); 35 uint32_t y1 = max((int32_t)y-1, 0); 36 uint32_t y2 = y; 37 uint32_t y3 = min((int32_t)y+1, gHeight-1); 38 uint32_t y4 = min((int32_t)y+2, gHeight-1); 39 40 float4 p0 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y0)) * gCoeffs[0] 41 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y0)) * gCoeffs[1] 42 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y0)) * gCoeffs[2] 43 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y0)) * gCoeffs[3] 44 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y0)) * gCoeffs[4]; 45 46 float4 p1 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y1)) * gCoeffs[5] 47 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y1)) * gCoeffs[6] 48 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y1)) * gCoeffs[7] 49 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y1)) * gCoeffs[8] 50 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y1)) * gCoeffs[9]; 51 52 float4 p2 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y2)) * gCoeffs[10] 53 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y2)) * gCoeffs[11] 54 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y2)) * gCoeffs[12] 55 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y2)) * gCoeffs[13] 56 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y2)) * gCoeffs[14]; 57 58 float4 p3 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y3)) * gCoeffs[15] 59 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y3)) * gCoeffs[16] 60 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y3)) * gCoeffs[17] 61 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y3)) * gCoeffs[18] 62 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y3)) * gCoeffs[19]; 63 64 float4 p4 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y4)) * gCoeffs[20] 65 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y4)) * gCoeffs[21] 66 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y4)) * gCoeffs[22] 67 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y4)) * gCoeffs[23] 68 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y4)) * gCoeffs[24]; 69 70 p0 = clamp(p0 + p1 + p2 + p3 + p4, 0.f, 255.f); 71 return convert_uchar4(p0); 72} 73 74 75