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/*
* Copyright 2019-2021 Diligent Graphics LLC
* Copyright 2015-2019 Egor Yusov
*
* 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.
*
* In no event and under no legal theory, whether in tort (including negligence),
* contract, or otherwise, unless required by applicable law (such as deliberate
* and grossly negligent acts) or agreed to in writing, shall any Contributor be
* liable for any damages, including any direct, indirect, special, incidental,
* or consequential damages of any character arising as a result of this License or
* out of the use or inability to use the software (including but not limited to damages
* for loss of goodwill, work stoppage, computer failure or malfunction, or any and
* all other commercial damages or losses), even if such Contributor has been advised
* of the possibility of such damages.
*/
#include "../include/PNGCodec.h"
#include "png.h"
#include "gtest/gtest.h"
#include <vector>
#include "DataBlobImpl.hpp"
using namespace Diligent;
namespace
{
TEST(Tools_TextureLoader, PNGCodec)
{
constexpr Uint32 TestImgWidth = 256;
constexpr Uint32 TestImgHeight = 128;
for (int EncodeAlpha = 0; EncodeAlpha <= 1; ++EncodeAlpha)
{
const Uint32 NumComponents = EncodeAlpha ? 4u : 3u;
std::vector<Uint8> RefPixels(TestImgWidth * TestImgHeight * NumComponents);
for (Uint32 y = 0; y < TestImgHeight; ++y)
{
for (Uint32 x = 0; x < TestImgWidth; ++x)
{
auto idx = x + y * TestImgWidth;
RefPixels[idx * NumComponents + 0] = (16 + idx) & 0xFF;
RefPixels[idx * NumComponents + 1] = (32 + idx) & 0xFF;
RefPixels[idx * NumComponents + 2] = (64 + idx) & 0xFF;
if (NumComponents == 4)
RefPixels[idx * NumComponents + 3] = (96 + idx) & 0xFF;
}
}
RefCntAutoPtr<IDataBlob> pPngData{MakeNewRCObj<DataBlobImpl>()(0)};
auto Res = EncodePng(RefPixels.data(), TestImgWidth, TestImgHeight, TestImgWidth * NumComponents,
EncodeAlpha ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB,
pPngData);
ASSERT_EQ(Res, ENCODE_PNG_RESULT_OK);
RefCntAutoPtr<IDataBlob> pDecodedPixelsBlob{MakeNewRCObj<DataBlobImpl>()(0)};
ImageDesc DecodedImgDesc;
DecodePng(pPngData, pDecodedPixelsBlob, &DecodedImgDesc);
ASSERT_EQ(DecodedImgDesc.Width, TestImgWidth);
ASSERT_EQ(DecodedImgDesc.Height, TestImgHeight);
ASSERT_EQ(DecodedImgDesc.NumComponents, NumComponents);
ASSERT_EQ(DecodedImgDesc.ComponentType, VT_UINT8);
const Uint8* pTestPixels = reinterpret_cast<const Uint8*>(pDecodedPixelsBlob->GetDataPtr());
for (Uint32 y = 0; y < TestImgHeight; ++y)
{
for (Uint32 x = 0; x < TestImgWidth; ++x)
{
for (Uint32 c = 0; c < NumComponents; ++c)
{
auto RefVal = RefPixels[(x + y * TestImgWidth) * NumComponents + c];
auto TestVal = pTestPixels[x * DecodedImgDesc.NumComponents + c + y * DecodedImgDesc.RowStride];
EXPECT_EQ(static_cast<Uint32>(RefVal), static_cast<Uint32>(TestVal)) << "[" << x << "," << y << "][" << c << "]";
}
}
}
}
}
} // namespace
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