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 #include "ip.rsh" 18 19 int32_t gWidth; 20 int32_t gHeight; 21 rs_allocation gIn; 22 23 float gCoeffs[25]; 24 25 uchar4 __attribute__((kernel)) root(uint32_t x, uint32_t y) { 26 uint32_t x0 = max((int32_t)x-2, 0); 27 uint32_t x1 = max((int32_t)x-1, 0); 28 uint32_t x2 = x; 29 uint32_t x3 = min((int32_t)x+1, gWidth-1); 30 uint32_t x4 = min((int32_t)x+2, gWidth-1); 31 32 uint32_t y0 = max((int32_t)y-2, 0); 33 uint32_t y1 = max((int32_t)y-1, 0); 34 uint32_t y2 = y; 35 uint32_t y3 = min((int32_t)y+1, gHeight-1); 36 uint32_t y4 = min((int32_t)y+2, gHeight-1); 37 38 float4 p0 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y0)) * gCoeffs[0] 39 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y0)) * gCoeffs[1] 40 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y0)) * gCoeffs[2] 41 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y0)) * gCoeffs[3] 42 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y0)) * gCoeffs[4]; 43 44 float4 p1 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y1)) * gCoeffs[5] 45 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y1)) * gCoeffs[6] 46 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y1)) * gCoeffs[7] 47 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y1)) * gCoeffs[8] 48 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y1)) * gCoeffs[9]; 49 50 float4 p2 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y2)) * gCoeffs[10] 51 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y2)) * gCoeffs[11] 52 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y2)) * gCoeffs[12] 53 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y2)) * gCoeffs[13] 54 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y2)) * gCoeffs[14]; 55 56 float4 p3 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y3)) * gCoeffs[15] 57 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y3)) * gCoeffs[16] 58 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y3)) * gCoeffs[17] 59 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y3)) * gCoeffs[18] 60 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y3)) * gCoeffs[19]; 61 62 float4 p4 = convert_float4(rsGetElementAt_uchar4(gIn, x0, y4)) * gCoeffs[20] 63 + convert_float4(rsGetElementAt_uchar4(gIn, x1, y4)) * gCoeffs[21] 64 + convert_float4(rsGetElementAt_uchar4(gIn, x2, y4)) * gCoeffs[22] 65 + convert_float4(rsGetElementAt_uchar4(gIn, x3, y4)) * gCoeffs[23] 66 + convert_float4(rsGetElementAt_uchar4(gIn, x4, y4)) * gCoeffs[24]; 67 68 p0 = clamp(p0 + p1 + p2 + p3 + p4, 0.f, 255.f); 69 return convert_uchar4(p0); 70 } 71 72 73
