Move openings to r_memory

src/swrenderer/r_memory.cpp

@@ -0,0 +1,52 @@
+
+#include <stdlib.h>
+#include "templates.h"
+#include "doomdef.h"
+#include "m_bbox.h"
+#include "i_system.h"
+#include "p_lnspec.h"
+#include "p_setup.h"
+#include "swrenderer/r_main.h"
+#include "swrenderer/drawers/r_draw.h"
+#include "a_sharedglobal.h"
+#include "g_level.h"
+#include "p_effect.h"
+#include "doomstat.h"
+#include "r_state.h"
+#include "v_palette.h"
+#include "r_sky.h"
+#include "po_man.h"
+#include "r_data/colormaps.h"
+#include "r_memory.h"
+
+namespace swrenderer
+{
+	short *openings;
+
+	namespace
+	{
+		size_t maxopenings;
+		ptrdiff_t lastopening;
+	}
+
+	ptrdiff_t R_NewOpening(ptrdiff_t len)
+	{
+		ptrdiff_t res = lastopening;
+		len = (len + 1) & ~1;	// only return DWORD aligned addresses because some code stores fixed_t's and floats in openings... 
+		lastopening += len;
+		if ((size_t)lastopening > maxopenings)
+		{
+			do
+				maxopenings = maxopenings ? maxopenings * 2 : 16384;
+			while ((size_t)lastopening > maxopenings);
+			openings = (short *)M_Realloc(openings, maxopenings * sizeof(*openings));
+			DPrintf(DMSG_NOTIFY, "MaxOpenings increased to %zu\n", maxopenings);
+		}
+		return res;
+	}
+
+	void R_FreeOpenings()
+	{
+		lastopening = 0;
+	}
+}