6178ba4a6b
* Add Transcoder API for C++ clients. We will add JavaScript and Java support in a later PR. * Transcoder: use fixed inner loop in some cases. This lets clang produce better ARM code for common cases. * Transcoder: stronger typing in Config, etc. * Transcoder: add UTILS_RESTRICT and noexcept.
131 lines
3.3 KiB
C++
131 lines
3.3 KiB
C++
/*
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* Copyright 2021 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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*/
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#include <geometry/Transcoder.h>
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#include <math/half.h>
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#include <gtest/gtest.h>
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using filament::math::half;
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using filament::geometry::Transcoder;
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using filament::geometry::ComponentType;
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class TranscoderTest : public testing::Test {};
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struct Vertex {
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uint8_t b0, b1, b2, b3;
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uint16_t s0, s1, s2;
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half h0;
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};
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static constexpr int count = 2;
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static const Vertex vbuffer[count] = {
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{
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0x00, 0xff, 0x7f, 0x81,
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0x0000, 0xffff, 0x7fff,
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half(-0.5f)
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},
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{
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0x00, 0xff, 0x7f, 0x80, // 0x80 is -128 when interpreted as int8_t
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0x0000, 0x8000, 0x7fff,
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half(1.0f)
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}
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};
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TEST_F(TranscoderTest, Normalized) {
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float result[count * 4];
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// UNSIGNED BYTES
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Transcoder transcodeBytes({
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.componentType = ComponentType::UBYTE,
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.normalized = true,
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.componentCount = 4u,
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.inputStrideBytes = sizeof(Vertex)
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});
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transcodeBytes(result, vbuffer, count);
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ASSERT_EQ(result[0], 0.0f);
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ASSERT_EQ(result[1], 1.0f);
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ASSERT_NEAR(result[2], 0.50f, 0.005f);
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ASSERT_NEAR(result[3], 0.51f, 0.005f);
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ASSERT_EQ(result[4], 0.0f);
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ASSERT_EQ(result[5], 1.0f);
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ASSERT_NEAR(result[6], 0.50f, 0.005f);
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ASSERT_NEAR(result[7], 0.50f, 0.005f);
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// SIGNED BYTES (twos-complement)
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Transcoder transcodeSignedBytes({
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.componentType = ComponentType::BYTE,
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.normalized = true,
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.componentCount = 4u,
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.inputStrideBytes = sizeof(Vertex)
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});
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transcodeSignedBytes(result, vbuffer, count);
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ASSERT_EQ(result[0], 0.0f);
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ASSERT_NEAR(result[1], -0.01f, 0.005f);
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ASSERT_EQ(result[2], +1.0f);
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ASSERT_EQ(result[3], -1.0f);
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ASSERT_EQ(result[7], -1.0f);
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}
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TEST_F(TranscoderTest, NonNormalized) {
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float result[count * 3];
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char const* srcBytes = (char const*) vbuffer;
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// SIGNED SHORTS (twos-complement)
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Transcoder transcodeShorts({
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.componentType = ComponentType::SHORT,
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.normalized = false,
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.componentCount = 3u,
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.inputStrideBytes = sizeof(Vertex)
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});
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size_t written = transcodeShorts(result, srcBytes + 4, count);
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ASSERT_EQ(written, sizeof(result));
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ASSERT_EQ(result[0], 0.0f);
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ASSERT_EQ(result[1], -1.0f);
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ASSERT_EQ(result[2], 32767.0f);
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ASSERT_EQ(result[4], -32768.0f);
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// HALF
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Transcoder transcodeHalf({
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.componentType = ComponentType::HALF,
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.normalized = false, // <= this field is ignored for HALF
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.componentCount = 1u,
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.inputStrideBytes = sizeof(Vertex)
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});
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transcodeHalf(result, srcBytes + 10, count);
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ASSERT_EQ(result[0], -0.5f);
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ASSERT_EQ(result[1], 1.0f);
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}
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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