1/*
2 * Copyright (C) 2022 Alyssa Rosenzweig
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24#include "agx_pack.h"
25
26#include <gtest/gtest.h>
27
28const struct {
29   float f;
30   uint16_t encoded;
31   bool inexact;
32} lod_cases[] = {
33   /* Lower bound clamp */
34   { -INFINITY, 0x00, true },
35   { -0.1, 0x00, true },
36   { -0.0, 0x00, true },
37
38   /* Exact bounds */
39   { 0.0, 0x00 },
40   { 14.0, 0x380 },
41
42   /* Upper bound clamp */
43   { 14.1, 0x380, true },
44   { 18.1, 0x380, true },
45   { INFINITY, 0x380, true },
46};
47
48class LODClamp : public testing::Test {
49};
50
51TEST_F(LODClamp, Encode)
52{
53   for (unsigned i = 0; i < ARRAY_SIZE(lod_cases); ++i)
54      ASSERT_EQ(__float_to_lod(lod_cases[i].f), lod_cases[i].encoded);
55}
56
57TEST_F(LODClamp, Decode)
58{
59   for (unsigned i = 0; i < ARRAY_SIZE(lod_cases); ++i) {
60      if (lod_cases[i].inexact)
61         continue;
62
63      uint8_t cl[4] = { 0 };
64      memcpy(cl, &lod_cases[i].encoded, sizeof(lod_cases[i].encoded));
65
66      ASSERT_EQ(__gen_unpack_lod(cl, 0, 10), lod_cases[i].f);
67   }
68}
69