1 files changed, 113 insertions, 0 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/internals/backend.h b/mesalib/src/glu/sgi/libnurbs/internals/backend.h
new file mode 100644
index 000000000..6840cb19e
--- /dev/null
+++ b/mesalib/src/glu/sgi/libnurbs/internals/backend.h
@@ -0,0 +1,113 @@
+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+
+/*
+ * backend.h
+ *
+ */
+
+#ifndef __glubackend_h_
+#define __glubackend_h_
+
+#include "trimvertex.h"
+#include "gridvertex.h"
+#include "gridtrimvertex.h"
+
+class BasicCurveEvaluator;
+class BasicSurfaceEvaluator;
+
+class Backend {
+private:
+    BasicCurveEvaluator&	curveEvaluator;
+    BasicSurfaceEvaluator&	surfaceEvaluator;
+public:
+  			Backend( BasicCurveEvaluator &c, BasicSurfaceEvaluator& e )
+			: curveEvaluator(c), surfaceEvaluator(e) {}
+
+    /* surface backend routines */
+    void		bgnsurf( int, int, long  );
+    void		patch( REAL, REAL, REAL, REAL );
+    void		surfpts( long, REAL *, long, long, int, int,
+          			 REAL, REAL, REAL, REAL );
+    void		surfbbox( long, REAL *, REAL * );
+    void		surfgrid( REAL, REAL, long, REAL, REAL, long ); 
+    void		surfmesh( long, long, long, long ); 
+    void		bgntmesh( const char * );
+    void		endtmesh( void );
+    void		swaptmesh( void );
+    void		tmeshvert( GridTrimVertex * );
+    void		tmeshvert( TrimVertex * );
+    void		tmeshvert( GridVertex * );
+    void		tmeshvert( REAL u,  REAL v );
+    void		linevert( TrimVertex * );
+    void		linevert( GridVertex * );
+    void		bgnoutline( void );
+    void		endoutline( void );
+    void		endsurf( void );
+    void		triangle( TrimVertex*, TrimVertex*, TrimVertex* );
+
+    void                bgntfan();
+    void                endtfan();
+    void                bgnqstrip();
+    void                endqstrip();
+    void                evalUStrip(int n_upper, REAL v_upper, REAL* upper_val, 
+				   int n_lower, REAL v_lower, REAL* lower_val
+				   );
+    void                evalVStrip(int n_left, REAL u_left, REAL* left_val, 
+				   int n_right, REAL v_right, REAL* right_val
+				   );
+    void                tmeshvertNOGE(TrimVertex *t);
+    void                tmeshvertNOGE_BU(TrimVertex *t);
+    void                tmeshvertNOGE_BV(TrimVertex *t);
+    void                preEvaluateBU(REAL u);
+    void                preEvaluateBV(REAL v);
+	
+
+    /* curve backend routines */
+    void		bgncurv( void );
+    void		segment( REAL, REAL );
+    void		curvpts( long, REAL *, long, int, REAL, REAL );
+    void		curvgrid( REAL, REAL, long );
+    void		curvmesh( long, long );
+    void		curvpt( REAL  );  
+    void		bgnline( void );
+    void		endline( void );
+    void		endcurv( void );
+private:
+#ifndef NOWIREFRAME
+    int			wireframetris;
+    int			wireframequads;
+    int			npts;
+    REAL		mesh[3][4];
+    int			meshindex;
+#endif
+};
+
+#endif /* __glubackend_h_ */