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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
use rust_gtest_interop::prelude::*;
use std::simd::prelude::*;
chromium::import! {
"//ui/android:texture_compressor";
}
use texture_compressor::{interleave_etc1, load_input_block};
#[gtest(TextureCompressorTest, InterleaveEtc1)]
fn test_interleave_etc1() {
let input =
[Simd::splat(0x1234), Simd::splat(0x5678), Simd::splat(0x9ABC), Simd::splat(0xDEF0)];
let expected = [Simd::splat(0x3412_7856_BC9A_F0DE); 4];
let result = interleave_etc1(input);
expect_eq!(result, expected);
}
#[gtest(TextureCompressorTest, LoadInputMirror)]
fn test_load_input_mirror() {
// Skip rustfmt to keep this formatted as a 6x2 image.
#[rustfmt::skip]
let input = [
0xFFFFFF, 0xEEEEEE, 0xDDDDDD, 0xCCCCCC, 0xBBBBBB, 0xAAAAAA,
0x999999, 0x888888, 0x777777, 0x666666, 0x555555, 0x444444,
];
let expected0 = [
[0xFF, 0xEE, 0xDD, 0xCC],
[0x99, 0x88, 0x77, 0x66],
[0x99, 0x88, 0x77, 0x66],
[0xFF, 0xEE, 0xDD, 0xCC],
];
let expected1 = [
[0xBB, 0xAA, 0xAA, 0xBB],
[0x55, 0x44, 0x44, 0x55],
[0x55, 0x44, 0x44, 0x55],
[0xBB, 0xAA, 0xAA, 0xBB],
];
let result = load_input_block(&input, 6, 2, 6, 0, 0);
for ch in 0..3 {
expect_eq!(result.map(|row| row.map(|x| x[ch].as_array()[0])), expected0);
expect_eq!(result.map(|row| row.map(|x| x[ch].as_array()[1])), expected1);
}
}
#[gtest(TextureCompressorTest, LoadInputMirror1x1)]
fn test_load_input_mirror_1x1() {
let input = [0x999999];
let expected = 0x99;
let result = load_input_block(&input, 1, 1, 1, 0, 0);
for y in 0..4 {
for x in 0..4 {
for ch in 0..3 {
expect_eq!(result[y][x][ch].as_array()[0], expected);
}
}
}
}
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