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vguimatsurface/Clip2D.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Contains 2D clipping routines
+//
+// $Revision: $
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef CLIP2D_H
+#define CLIP2D_H
+
+namespace vgui
+{
+	struct Vertex_t;
+}
+
+//-----------------------------------------------------------------------------
+// Enable/disable scissoring...
+//-----------------------------------------------------------------------------
+void EnableScissor( bool enable );
+
+//-----------------------------------------------------------------------------
+// For simulated scissor tests...
+//-----------------------------------------------------------------------------
+void SetScissorRect( int left, int top, int right, int bottom );
+void GetScissorRect( int &left, int &top, int &right, int &bottom, bool &enabled );
+
+//-----------------------------------------------------------------------------
+// Clips a line segment to the current scissor rectangle
+//-----------------------------------------------------------------------------
+bool ClipLine( const vgui::Vertex_t *pInVerts, vgui::Vertex_t* pOutVerts );
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Does a scissor clip of the input rectangle.  
+// Returns false if it is completely clipped off.
+//-----------------------------------------------------------------------------
+bool ClipRect( const vgui::Vertex_t &inUL, const vgui::Vertex_t &inLR, 
+			   vgui::Vertex_t *pOutUL, vgui::Vertex_t *pOutLR );
+
+//-----------------------------------------------------------------------------
+// Clips a polygon to the screen area
+//-----------------------------------------------------------------------------
+int ClipPolygon( int iCount, vgui::Vertex_t *pVerts, int iTranslateX, int iTranslateY, vgui::Vertex_t ***pppOutVertex ); 
+
+#endif // CLIP2D_H