From 5df82c82bd53db90eb72c5aad4dd20cf6f1116b1 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 22 Aug 2003 20:11:43 +0000
Subject: patch to import Jon Smirl's work from Bitkeeper

---
 src/mesa/tnl_dd/t_dd_rendertmp.h | 437 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 437 insertions(+)
 create mode 100644 src/mesa/tnl_dd/t_dd_rendertmp.h

(limited to 'src/mesa/tnl_dd/t_dd_rendertmp.h')

diff --git a/src/mesa/tnl_dd/t_dd_rendertmp.h b/src/mesa/tnl_dd/t_dd_rendertmp.h
new file mode 100644
index 0000000000..fc00e76934
--- /dev/null
+++ b/src/mesa/tnl_dd/t_dd_rendertmp.h
@@ -0,0 +1,437 @@
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.5
+ *
+ * Copyright (C) 1999-2001  Brian Paul   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 and this permission notice 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
+ * BRIAN PAUL 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.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#ifndef POSTFIX
+#define POSTFIX
+#endif
+
+#ifndef INIT
+#define INIT(x)
+#endif
+
+#ifndef NEED_EDGEFLAG_SETUP
+#define NEED_EDGEFLAG_SETUP 0
+#define EDGEFLAG_GET(a) 0
+#define EDGEFLAG_SET(a,b) (void)b
+#endif
+
+#ifndef RESET_STIPPLE
+#define RESET_STIPPLE
+#endif
+
+#ifndef RESET_OCCLUSION
+#define RESET_OCCLUSION
+#endif
+
+#ifndef TEST_PRIM_END
+#define TEST_PRIM_END(flags) (flags & PRIM_END)
+#define TEST_PRIM_BEGIN(flags) (flags & PRIM_BEGIN)
+#define TEST_PRIM_PARITY(flags) (flags & PRIM_PARITY)
+#endif
+
+#ifndef ELT
+#define ELT(x) x
+#endif
+
+#ifndef RENDER_TAB_QUALIFIER
+#define RENDER_TAB_QUALIFIER static
+#endif
+
+static void TAG(render_points)( GLcontext *ctx,
+				GLuint start,
+				GLuint count,
+				GLuint flags )
+{
+   LOCAL_VARS;
+   (void) flags;
+
+   RESET_OCCLUSION;
+   INIT(GL_POINTS);
+   RENDER_POINTS( start, count );
+   POSTFIX;
+}
+
+static void TAG(render_lines)( GLcontext *ctx,
+			       GLuint start,
+			       GLuint count,
+			       GLuint flags )
+{
+   GLuint j;
+   LOCAL_VARS;
+   (void) flags;
+
+   RESET_OCCLUSION;
+   INIT(GL_LINES);
+   for (j=start+1; j<count; j+=2 ) {
+      RENDER_LINE( ELT(j-1), ELT(j) );
+      RESET_STIPPLE;
+   }
+   POSTFIX;
+}
+
+
+static void TAG(render_line_strip)( GLcontext *ctx,
+				    GLuint start,
+				    GLuint count,
+				    GLuint flags )
+{
+   GLuint j;
+   LOCAL_VARS;
+   (void) flags;
+
+   RESET_OCCLUSION;
+   INIT(GL_LINE_STRIP);
+
+   for (j=start+1; j<count; j++ )
+      RENDER_LINE( ELT(j-1), ELT(j) );
+
+   if (TEST_PRIM_END(flags))
+      RESET_STIPPLE;
+
+   POSTFIX;
+}
+
+
+static void TAG(render_line_loop)( GLcontext *ctx,
+				   GLuint start,
+				   GLuint count,
+				   GLuint flags )
+{
+   GLuint i;
+   LOCAL_VARS;
+
+   (void) flags;
+
+   RESET_OCCLUSION;
+   INIT(GL_LINE_LOOP);
+
+   if (start+1 < count) {
+      if (TEST_PRIM_BEGIN(flags)) {
+	 RENDER_LINE( ELT(start), ELT(start+1) );
+      }
+
+      for ( i = start+2 ; i < count ; i++) {
+	 RENDER_LINE( ELT(i-1), ELT(i) );
+      }
+
+      if ( TEST_PRIM_END(flags)) {
+	 RENDER_LINE( ELT(count-1), ELT(start) );
+	 RESET_STIPPLE;
+      }
+   }
+
+   POSTFIX;
+}
+
+
+static void TAG(render_triangles)( GLcontext *ctx,
+				   GLuint start,
+				   GLuint count,
+				   GLuint flags )
+{
+   GLuint j;
+   LOCAL_VARS;
+   (void) flags;
+
+   INIT(GL_TRIANGLES);
+   if (NEED_EDGEFLAG_SETUP) {
+      for (j=start+2; j<count; j+=3) {
+	 /* Leave the edgeflags as supplied by the user.
+	  */
+	 RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) );
+	 RESET_STIPPLE;
+      }
+   } else {
+      for (j=start+2; j<count; j+=3) {
+	 RENDER_TRI( ELT(j-2), ELT(j-1), ELT(j) );
+      }
+   }
+   POSTFIX;
+}
+
+
+
+static void TAG(render_tri_strip)( GLcontext *ctx,
+				   GLuint start,
+				   GLuint count,
+				   GLuint flags )
+{
+   GLuint j;
+   GLuint parity = 0;
+   LOCAL_VARS;
+
+   if (TEST_PRIM_PARITY(flags))
+      parity = 1;
+
+   INIT(GL_TRIANGLE_STRIP);
+   if (NEED_EDGEFLAG_SETUP) {
+      for (j=start+2;j<count;j++,parity^=1) {
+	 GLuint ej2 = ELT(j-2+parity);
+	 GLuint ej1 = ELT(j-1-parity);
+	 GLuint ej = ELT(j);
+	 GLboolean ef2 = EDGEFLAG_GET( ej2 );
+	 GLboolean ef1 = EDGEFLAG_GET( ej1 );
+	 GLboolean ef = EDGEFLAG_GET( ej );
+	 EDGEFLAG_SET( ej2, GL_TRUE );
+	 EDGEFLAG_SET( ej1, GL_TRUE );
+	 EDGEFLAG_SET( ej, GL_TRUE );
+	 RENDER_TRI( ej2, ej1, ej );
+	 EDGEFLAG_SET( ej2, ef2 );
+	 EDGEFLAG_SET( ej1, ef1 );
+	 EDGEFLAG_SET( ej, ef );
+	 RESET_STIPPLE;
+      }
+   } else {
+      for (j=start+2; j<count ; j++, parity^=1) {
+	 RENDER_TRI( ELT(j-2+parity), ELT(j-1-parity), ELT(j) );
+      }
+   }
+   POSTFIX;
+}
+
+
+static void TAG(render_tri_fan)( GLcontext *ctx,
+				 GLuint start,
+				 GLuint count,
+				 GLuint flags )
+{
+   GLuint j;
+   LOCAL_VARS;
+   (void) flags;
+
+   INIT(GL_TRIANGLE_FAN);
+   if (NEED_EDGEFLAG_SETUP) {
+      for (j=start+2;j<count;j++) {
+	 /* For trifans, all edges are boundary.
+	  */
+	 GLuint ejs = ELT(start);
+	 GLuint ej1 = ELT(j-1);
+	 GLuint ej = ELT(j);
+	 GLboolean efs = EDGEFLAG_GET( ejs );
+	 GLboolean ef1 = EDGEFLAG_GET( ej1 );
+	 GLboolean ef = EDGEFLAG_GET( ej );
+	 EDGEFLAG_SET( ejs, GL_TRUE );
+	 EDGEFLAG_SET( ej1, GL_TRUE );
+	 EDGEFLAG_SET( ej, GL_TRUE );
+	 RENDER_TRI( ejs, ej1, ej);
+	 EDGEFLAG_SET( ejs, efs );
+	 EDGEFLAG_SET( ej1, ef1 );
+	 EDGEFLAG_SET( ej, ef );
+	 RESET_STIPPLE;
+      }
+   } else {
+      for (j=start+2;j<count;j++) {
+	 RENDER_TRI( ELT(start), ELT(j-1), ELT(j) );
+      }
+   }
+
+   POSTFIX;
+}
+
+
+static void TAG(render_poly)( GLcontext *ctx,
+			      GLuint start,
+			      GLuint count,
+			      GLuint flags )
+{
+   GLuint j = start+2;
+   LOCAL_VARS;
+   (void) flags;
+
+   INIT(GL_POLYGON);
+   if (NEED_EDGEFLAG_SETUP) {
+      GLboolean efstart = EDGEFLAG_GET( ELT(start) );
+      GLboolean efcount = EDGEFLAG_GET( ELT(count-1) );
+
+      /* If the primitive does not begin here, the first edge
+       * is non-boundary.
+       */
+      if (!TEST_PRIM_BEGIN(flags))
+	 EDGEFLAG_SET( ELT(start), GL_FALSE );
+
+      /* If the primitive does not end here, the final edge is
+       * non-boundary.
+       */
+      if (!TEST_PRIM_END(flags))
+	 EDGEFLAG_SET( ELT(count-1), GL_FALSE );
+
+      /* Draw the first triangles (possibly zero)
+       */
+      if (j<count-1) {
+	 GLboolean ef = EDGEFLAG_GET( ELT(j) );
+	 EDGEFLAG_SET( ELT(j), GL_FALSE );
+	 RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
+	 EDGEFLAG_SET( ELT(j), ef );
+	 j++;
+
+	 /* Don't render the first edge again:
+	  */
+	 EDGEFLAG_SET( ELT(start), GL_FALSE );
+
+	 for (;j<count-1;j++) {
+	    GLboolean efj = EDGEFLAG_GET( ELT(j) );
+	    EDGEFLAG_SET( ELT(j), GL_FALSE );
+	    RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
+	    EDGEFLAG_SET( ELT(j), efj );
+	 }
+      }
+
+      /* Draw the last or only triangle
+       */
+      if (j < count)
+	 RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
+
+      /* Restore the first and last edgeflags:
+       */
+      EDGEFLAG_SET( ELT(count-1), efcount );
+      EDGEFLAG_SET( ELT(start), efstart );
+
+      if (TEST_PRIM_END(flags)) {
+	 RESET_STIPPLE;
+      }
+   }
+   else {
+      for (j=start+2;j<count;j++) {
+	 RENDER_TRI( ELT(j-1), ELT(j), ELT(start) );
+      }
+   }
+   POSTFIX;
+}
+
+static void TAG(render_quads)( GLcontext *ctx,
+			       GLuint start,
+			       GLuint count,
+			       GLuint flags )
+{
+   GLuint j;
+   LOCAL_VARS;
+   (void) flags;
+
+   INIT(GL_QUADS);
+   if (NEED_EDGEFLAG_SETUP) {
+      for (j=start+3; j<count; j+=4) {
+	 /* Use user-specified edgeflags for quads.
+	  */
+	 RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) );
+	 RESET_STIPPLE;
+      }
+   } else {
+      for (j=start+3; j<count; j+=4) {
+	 RENDER_QUAD( ELT(j-3), ELT(j-2), ELT(j-1), ELT(j) );
+      }
+   }
+   POSTFIX;
+}
+
+static void TAG(render_quad_strip)( GLcontext *ctx,
+				    GLuint start,
+				    GLuint count,
+				    GLuint flags )
+{
+   GLuint j;
+   LOCAL_VARS;
+   (void) flags;
+
+   INIT(GL_QUAD_STRIP);
+   if (NEED_EDGEFLAG_SETUP) {
+      for (j=start+3;j<count;j+=2) {
+	 /* All edges are boundary.  Set edgeflags to 1, draw the
+	  * quad, and restore them to the original values.
+	  */
+	 GLboolean ef3 = EDGEFLAG_GET( ELT(j-3) );
+	 GLboolean ef2 = EDGEFLAG_GET( ELT(j-2) );
+	 GLboolean ef1 = EDGEFLAG_GET( ELT(j-1) );
+	 GLboolean ef = EDGEFLAG_GET( ELT(j) );
+	 EDGEFLAG_SET( ELT(j-3), GL_TRUE );
+	 EDGEFLAG_SET( ELT(j-2), GL_TRUE );
+	 EDGEFLAG_SET( ELT(j-1), GL_TRUE );
+	 EDGEFLAG_SET( ELT(j), GL_TRUE );
+	 RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) );
+	 EDGEFLAG_SET( ELT(j-3), ef3 );
+	 EDGEFLAG_SET( ELT(j-2), ef2 );
+	 EDGEFLAG_SET( ELT(j-1), ef1 );
+	 EDGEFLAG_SET( ELT(j), ef );
+	 RESET_STIPPLE;
+      }
+   } else {
+      for (j=start+3;j<count;j+=2) {
+	 RENDER_QUAD( ELT(j-1), ELT(j-3), ELT(j-2), ELT(j) );
+      }
+   }
+   POSTFIX;
+}
+
+static void TAG(render_noop)( GLcontext *ctx,
+			      GLuint start,
+			      GLuint count,
+			      GLuint flags )
+{
+   (void)(ctx && start && count && flags);
+}
+
+RENDER_TAB_QUALIFIER void (*TAG(render_tab)[GL_POLYGON+2])(GLcontext *,
+							   GLuint,
+							   GLuint,
+							   GLuint) =
+{
+   TAG(render_points),
+   TAG(render_lines),
+   TAG(render_line_loop),
+   TAG(render_line_strip),
+   TAG(render_triangles),
+   TAG(render_tri_strip),
+   TAG(render_tri_fan),
+   TAG(render_quads),
+   TAG(render_quad_strip),
+   TAG(render_poly),
+   TAG(render_noop),
+};
+
+
+
+#ifndef PRESERVE_VB_DEFS
+#undef RENDER_TRI
+#undef RENDER_QUAD
+#undef RENDER_LINE
+#undef RENDER_POINTS
+#undef LOCAL_VARS
+#undef INIT
+#undef POSTFIX
+#undef RESET_STIPPLE
+#undef DBG
+#undef ELT
+#undef RENDER_TAB_QUALIFIER
+#endif
+
+#ifndef PRESERVE_TAG
+#undef TAG
+#endif
+
+#undef PRESERVE_VB_DEFS
+#undef PRESERVE_TAG
-- 
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