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Runtime/Sources/Graphics/Loaders/BMP.cpp

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+#include <Graphics/Loaders/BMP.h>
+#include <Maths/Vec3.h>
+
+#include <fstream>
+
+namespace Scop
+{
+	CPUBuffer LoadBMPFile(const std::filesystem::path& path, Vec2ui32& dimensions)
+	{
+		if(path.extension() != ".bmp")
+		{
+			Error("BMP loader: not a BMP file, %", path);
+			return {};
+		}
+		std::ifstream file(path, std::ios::binary);
+		if(!file.is_open())
+		{
+			Error("BMP loader: could not open %", path);
+			return {};
+		}
+		std::int16_t bpp;
+		file.seekg(18, std::ios_base::beg);
+		file.read(reinterpret_cast<char*>(&dimensions.x), sizeof(dimensions.x));
+		file.read(reinterpret_cast<char*>(&dimensions.y), sizeof(dimensions.y));
+		file.seekg(28, std::ios_base::beg);
+		file.read(reinterpret_cast<char*>(&bpp), sizeof(bpp));
+		file.seekg(54, std::ios_base::beg);
+		if(bpp != 24)
+			Warning("BMP loader: warning while loading %, cannot handle yet different color palette sizes", path);
+		CPUBuffer buffer{ dimensions.x * dimensions.y * 4 };
+		for(std::size_t i = 0; i < buffer.GetSize(); i += 4)
+		{
+			Vec3b data{ 0, 0, 0 };
+			data.x = (file.eof() ? 0x00 : file.get());
+			data.y = (file.eof() ? 0x00 : file.get());
+			data.z = (file.eof() ? 0x00 : file.get());
+			buffer.GetData()[i + 0] = data.z;
+			buffer.GetData()[i + 1] = data.y;
+			buffer.GetData()[i + 2] = data.x;
+			buffer.GetData()[i + 3] = 0xFF;
+		}
+		Message("BMP Loader: loaded %", path);
+		return buffer;
+	}
+}