PFM image loader + tests

tests/Image/ImageLoaderPfmTest.cpp

@@ -0,0 +1,84 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <catch2/catch_test_macros.hpp>
+#include <sstream>
+#include <vector>
+
+#include "Image/ImageLoaderPfm.hpp"
+#include "Scene/DataFormat.hpp"
+
+using namespace OpenVulkano;
+using namespace OpenVulkano::Image;
+
+TEST_CASE("ImageLoaderPfm loads PFM images", "[ImageLoaderPfm]")
+{
+	ImageLoaderPfm loader;
+
+	SECTION("Grayscale Pf image")
+	{
+		std::ostringstream pfStream;
+		pfStream << "Pf\n"
+		         << "4 2\n"
+		         << "-1.0\n";
+
+		for (int i = 0; i < 8; ++i)
+		{
+			float pixelValue = 1.0f;
+			pfStream.write(reinterpret_cast<const char*>(&pixelValue), sizeof(float));
+		}
+
+		std::string pfData = pfStream.str();
+		std::vector<uint8_t> pfBuffer(pfData.begin(), pfData.end());
+
+		auto image = loader.loadFromMemory(pfBuffer);
+
+		REQUIRE(image != nullptr);
+		REQUIRE(image->resolution.x == 4);
+		REQUIRE(image->resolution.y == 2);
+		REQUIRE(image->dataFormat == DataFormat::Format::R32_SFLOAT);
+
+		const float expectedValue = 1.0f;
+		for (size_t i = 0; i < image->data.Size(); i += sizeof(float))
+		{
+			float value;
+			std::memcpy(&value, &image->data[i], sizeof(float));
+			REQUIRE(value == expectedValue);
+		}
+	}
+
+	SECTION("Color PF image")
+	{
+        std::ostringstream pfStream;
+        pfStream << "PF\n"
+                 << "3 2\n"
+                 << "-1.0\n";
+
+		for (int i = 0; i < 6 * 3; ++i)
+		{
+			float pixelValue = 1.0f;
+			pfStream.write(reinterpret_cast<const char*>(&pixelValue), sizeof(float));
+		}
+
+		std::string pfData = pfStream.str();
+		std::vector<uint8_t> pfBuffer(pfData.begin(), pfData.end());
+
+		auto image = loader.loadFromMemory(pfBuffer);
+
+		REQUIRE(image != nullptr);
+		REQUIRE(image->resolution.x == 3);
+		REQUIRE(image->resolution.y == 2);
+		REQUIRE(image->dataFormat == DataFormat::Format::R32G32B32_SFLOAT);
+
+		const float expectedValue = 1.0f;
+		for (size_t i = 0; i < image->data.Size(); i += sizeof(float))
+		{
+			float value;
+			std::memcpy(&value, &image->data[i], sizeof(float));
+			REQUIRE(value == expectedValue);
+		}
+	}
+}