| // Copyright 2019 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. |
| |
| // This file contains common code used by the image decompression shaders. |
| |
| // DIM is preprocessor macro set by the build script that determines whether the shader will |
| // process 1D, 2D or 3D images |
| #if DIM == 1 |
| #define IMG_TYPE 1DArray |
| #elif DIM == 2 |
| #define IMG_TYPE 2DArray |
| #elif DIM == 3 |
| #define IMG_TYPE 3D |
| #else |
| #error "Please set the `DIM` preprocessor macro to 1, 2 or 3. Example: glslc -DDIM=2" |
| #endif |
| |
| // Concatenates 2 tokens while also performing macro replacement |
| // |
| // For example: |
| // #define FOO world |
| // CONCAT(hello, FOO) |
| // |
| // Becomes: |
| // helloworld |
| #define CONCAT_(x, y) x##y // concatenation |
| #define CONCAT(x, y) CONCAT_(x, y) // macro replacement |
| |
| // Appends the correct image type ("1DArray", "2DArray", or "3D") to x |
| #define WITH_TYPE(x) CONCAT(x, IMG_TYPE) |
| |
| // TODO(gregschlom): do we actually use 1DArray images? |
| ivec2 getPos1DArray(ivec3 pos) { return pos.xz; } |
| ivec3 getPos2DArray(ivec3 pos) { return pos; } |
| ivec3 getPos3D(ivec3 pos) { return pos; } |
