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.sample) 19 #include "rs_graphics.rsh" 20 21 static rs_allocation sourceAlloc; 22 static rs_allocation destAlloc; 23 static rs_sampler allocSampler; 24 25 void setSampleData(rs_allocation dest, rs_allocation source, rs_sampler sampler) { 26 destAlloc = dest; 27 sourceAlloc = source; 28 allocSampler = sampler; 29 } 30 31 void root(uchar4 *out, uint32_t x, uint32_t y) { 32 33 float destX = (float)rsAllocationGetDimX(destAlloc) - 1.0f; 34 float destY = (float)rsAllocationGetDimY(destAlloc) - 1.0f; 35 36 float2 uv; 37 uv.x = (float)x / destX; 38 uv.y = (float)y / destY; 39 40 out->xyz = convert_uchar3(rsSample(sourceAlloc, allocSampler, uv * 2.0f).xyz * 255.0f); 41 out->w = 0xff; 42 } 43 44