Initial commit.

code/win32/win_stencilshadow.h

@@ -0,0 +1,63 @@
+//
+//
+// win_stencilshadow.h
+//
+// Declaration for stencil shadowing class
+//
+//
+
+#ifndef _WIN_STENCILSHADOW_H_
+#define _WIN_STENCILSHADOW_H_
+
+// Quick way turn off all stencilshadow code, and get back 170k of memory:
+//#define DISABLE_STENCILSHADOW
+
+// Enable this to enable Carmack's stencil reverse method
+#define _STENCIL_REVERSE
+
+typedef struct 
+{
+	// facing is only one bit, but we can't do better than 4 bytes without
+	// packing all the data we need into a single unsigned short, which
+	// isn't really worth it. (unless we REALLY need 64k at some point).
+	unsigned short	i2;
+	byte	facing;
+} edgeDef_t;
+
+#define	MAX_EDGE_DEFS	16
+
+
+class StencilShadow
+{
+public:
+
+#ifndef DISABLE_STENCILSHADOW
+	edgeDef_t		m_edgeDefs[SHADER_MAX_VERTEXES][MAX_EDGE_DEFS];
+	short			m_numEdgeDefs[SHADER_MAX_VERTEXES];
+	byte			m_facing[SHADER_MAX_INDEXES/3];
+	unsigned short  m_shadowIndexes[SHADER_MAX_INDEXES];
+	unsigned short	m_nIndexes;
+	float			m_extrusionIndicators[SHADER_MAX_VERTEXES/2];
+#ifdef _STENCIL_REVERSE
+	unsigned short  m_shadowIndexesCap[SHADER_MAX_INDEXES];
+	unsigned short  m_nIndexesCap;
+#endif
+
+#endif
+	DWORD		m_dwVertexShaderShadow;
+	DWORD		*pVerts;	// For reusing vertices in multiple shadow renderings
+	DWORD		*pExtrusions;
+
+	StencilShadow();
+	~StencilShadow();
+	bool Initialize();
+	void AddEdge( unsigned short i1, unsigned short i2, byte facing );
+	void BuildEdges();
+	bool BuildFromLight();
+	void RenderShadow();
+	void FinishShadows();
+};
+
+extern StencilShadow StencilShadower;
+
+#endif