- added Build's NPOT emulation to the backend.

For GZDoom this is completely disabled, of course, because the Doom engine does not need it, but in order to have the same backend code in both engines it needs to be present.

src/common/rendering/hwrenderer/data/hw_renderstate.h

@@ -4,6 +4,7 @@
 #include "matrix.h"
 #include "hw_material.h"
 #include "texmanip.h"
+#include "version.h"
 
 struct FColormap;
 class IVertexBuffer;
@@ -198,6 +199,9 @@ struct StreamData
 	FVector4 uSplitBottomPlane;
 
 	FVector4 uDetailParms;
+#ifdef NPOT_EMULATION
+	FVector2 uNpotEmulation;
+#endif
 };
 
 class FRenderState
@@ -289,7 +293,9 @@ public:
 		mStreamData.uSplitBottomPlane = { 0.0f, 0.0f, 0.0f, 0.0f };
 		mStreamData.uDynLightColor = { 0.0f, 0.0f, 0.0f, 0.0f };
 		mStreamData.uDetailParms = { 0.0f, 0.0f, 0.0f, 0.0f };
-
+#ifdef NPOT_EMULATION
+		mStreamData.uNpotEmulation = { 0,0 };
+#endif
 		mModelMatrix.loadIdentity();
 		mTextureMatrix.loadIdentity();
 		ClearClipSplit();
@@ -472,6 +478,13 @@ public:
 		mStreamData.uAddColor = pe;
 	}
 
+	void SetNpotEmulation(float factor, float offset)
+	{
+#ifdef NPOT_EMULATION
+		mStreamData.uNpotEmulation = { offset, factor };
+#endif
+	}
+
 	void ApplyTextureManipulation(TextureManipulation* texfx)
 	{
 		if (!texfx || texfx->AddColor.a == 0)