- sanitized dependencies of the softpoly render backend.

This included half the game state and lots of unneeded parts of the software renderer.
The two modules that are shared between softpoly and the classic software renderer have been moved to a neutral place.

src/common/utility/r_memory.cpp

@@ -0,0 +1,101 @@
+/*
+**  Render memory allocation
+**  Copyright (c) 2016-2020 Magnus Norddahl
+**
+**  This software is provided 'as-is', without any express or implied
+**  warranty.  In no event will the authors be held liable for any damages
+**  arising from the use of this software.
+**
+**  Permission is granted to anyone to use this software for any purpose,
+**  including commercial applications, and to alter it and redistribute it
+**  freely, subject to the following restrictions:
+**
+**  1. The origin of this software must not be misrepresented; you must not
+**     claim that you wrote the original software. If you use this software
+**     in a product, an acknowledgment in the product documentation would be
+**     appreciated but is not required.
+**  2. Altered source versions must be plainly marked as such, and must not be
+**     misrepresented as being the original software.
+**  3. This notice may not be removed or altered from any source distribution.
+**
+*/
+
+#include <stdlib.h>
+#include "templates.h"
+#include "r_memory.h"
+#include <stdlib.h>
+
+void *RenderMemory::AllocBytes(int size)
+{
+	size = (size + 15) / 16 * 16; // 16-byte align
+		
+	if (UsedBlocks.empty() || UsedBlocks.back()->Position + size > BlockSize)
+	{
+		if (!FreeBlocks.empty())
+		{
+			auto block = std::move(FreeBlocks.back());
+			block->Position = 0;
+			FreeBlocks.pop_back();
+			UsedBlocks.push_back(std::move(block));
+		}
+		else
+		{
+			UsedBlocks.push_back(std::unique_ptr<MemoryBlock>(new MemoryBlock()));
+		}
+	}
+		
+	auto &block = UsedBlocks.back();
+	void *data = block->Data + block->Position;
+	block->Position += size;
+
+	return data;
+}
+	
+void RenderMemory::Clear()
+{
+	while (!UsedBlocks.empty())
+	{
+		auto block = std::move(UsedBlocks.back());
+		UsedBlocks.pop_back();
+		FreeBlocks.push_back(std::move(block));
+	}
+}
+
+static void* Aligned_Alloc(size_t alignment, size_t size)
+{
+	void* ptr;
+#if defined (_MSC_VER) || defined (__MINGW32__)
+	ptr = _aligned_malloc(size, alignment);
+	if (!ptr)
+		throw std::bad_alloc();
+#else
+	// posix_memalign required alignment to be a min of sizeof(void *)
+	if (alignment < sizeof(void*))
+		alignment = sizeof(void*);
+
+	if (posix_memalign((void**)&ptr, alignment, size))
+		throw std::bad_alloc();
+#endif
+	return ptr;
+}
+
+static void Aligned_Free(void* ptr)
+{
+	if (ptr)
+	{
+#if defined _MSC_VER
+		_aligned_free(ptr);
+#else
+		free(ptr);
+#endif
+	}
+}
+
+RenderMemory::MemoryBlock::MemoryBlock() : Data(static_cast<uint8_t*>(Aligned_Alloc(16, BlockSize))), Position(0)
+{
+}
+
+RenderMemory::MemoryBlock::~MemoryBlock()
+{
+	Aligned_Free(Data);
+}