42 lines
1.4 KiB
Plaintext
42 lines
1.4 KiB
Plaintext
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// Copyright 2019 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// This file contains common code used by the image decompression shaders.
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// DIM is preprocessor macro set by the build script that determines whether the shader will
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// process 1D, 2D or 3D images
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#if DIM == 1
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#define IMG_TYPE 1DArray
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#elif DIM == 2
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#define IMG_TYPE 2DArray
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#elif DIM == 3
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#define IMG_TYPE 3D
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#else
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#error "Please set the `DIM` preprocessor macro to 1, 2 or 3. Example: glslc -DDIM=2"
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#endif
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// Concatenates 2 tokens while also performing macro replacement
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//
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// For example:
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// #define FOO world
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// CONCAT(hello, FOO)
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//
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// Becomes:
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// helloworld
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#define CONCAT_(x, y) x##y // concatenation
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#define CONCAT(x, y) CONCAT_(x, y) // macro replacement
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// Appends the correct image type ("1DArray", "2DArray", or "3D") to x
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#define WITH_TYPE(x) CONCAT(x, IMG_TYPE)
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