From 0b7d07f841d8ed1f6da94a8f4a2900c2eff6355d Mon Sep 17 00:00:00 2001
From: assiduous <assiduous@diligentgraphics.com>
Date: Tue, 7 Apr 2020 18:14:11 -0700
Subject: Reworked PNG and JPEG image decoding to fix incompatibility of setjmp
 with c++ destructors. Added JPEG and PNG encoding/decoding tests

---
 Tests/DiligentToolsTest/src/PNGCodecTest.cpp | 99 ++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 Tests/DiligentToolsTest/src/PNGCodecTest.cpp

(limited to 'Tests/DiligentToolsTest/src/PNGCodecTest.cpp')

diff --git a/Tests/DiligentToolsTest/src/PNGCodecTest.cpp b/Tests/DiligentToolsTest/src/PNGCodecTest.cpp
new file mode 100644
index 0000000..cdb1f0e
--- /dev/null
+++ b/Tests/DiligentToolsTest/src/PNGCodecTest.cpp
@@ -0,0 +1,99 @@
+/*
+ *  Copyright 2019-2020 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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