- added the softpoly and Vulkan backend code fron GZDoom.

Not hooked up yet.

source/common/rendering/polyrenderer/backend/poly_hwtexture.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#ifdef LoadImage
+#undef LoadImage
+#endif
+
+#define SHADED_TEXTURE -1
+#define DIRECT_PALETTE -2
+
+#include "tarray.h"
+#include "hw_ihwtexture.h"
+#include "volk/volk.h"
+
+struct FMaterialState;
+class PolyBuffer;
+
+class PolyHardwareTexture : public IHardwareTexture
+{
+public:
+	PolyHardwareTexture();
+	~PolyHardwareTexture();
+
+	static void ResetAll();
+	void Reset();
+
+	DCanvas *GetImage(FTexture *tex, int translation, int flags);
+	PolyDepthStencil *GetDepthStencil(FTexture *tex);
+
+	// Software renderer stuff
+	void AllocateBuffer(int w, int h, int texelsize) override;
+	uint8_t *MapBuffer() override;
+	unsigned int CreateTexture(unsigned char * buffer, int w, int h, int texunit, bool mipmap, const char *name) override;
+
+	// Wipe screen
+	void CreateWipeTexture(int w, int h, const char *name);
+
+private:
+	void CreateImage(FTexture *tex, int translation, int flags);
+
+	static PolyHardwareTexture *First;
+	PolyHardwareTexture *Prev = nullptr;
+	PolyHardwareTexture *Next = nullptr;
+	std::unique_ptr<DCanvas> mCanvas;
+	std::unique_ptr<PolyDepthStencil> mDepthStencil;
+};