1// Copyright 2019 The Android Open Source Project 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15// This file contains common code used by the image decompression shaders. 16 17// DIM is preprocessor macro set by the build script that determines whether the shader will 18// process 1D, 2D or 3D images 19#if DIM == 1 20#define IMG_TYPE 1DArray 21#elif DIM == 2 22#define IMG_TYPE 2DArray 23#elif DIM == 3 24#define IMG_TYPE 3D 25#else 26#error "Please set the `DIM` preprocessor macro to 1, 2 or 3. Example: glslc -DDIM=2" 27#endif 28 29// Concatenates 2 tokens while also performing macro replacement 30// 31// For example: 32// #define FOO world 33// CONCAT(hello, FOO) 34// 35// Becomes: 36// helloworld 37#define CONCAT_(x, y) x##y // concatenation 38#define CONCAT(x, y) CONCAT_(x, y) // macro replacement 39 40// Appends the correct image type ("1DArray", "2DArray", or "3D") to x 41#define WITH_TYPE(x) CONCAT(x, IMG_TYPE) 42