Added MesaLib-7.6

1 files changed, 190 insertions, 0 deletions

diff --git a/mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc
new file mode 100644
index 000000000..26d05342f
--- /dev/null
+++ b/mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc
@@ -0,0 +1,190 @@
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+** 
+** http://oss.sgi.com/projects/FreeB
+** 
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+** 
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+** 
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+/*
+*/
+
+#include "gluos.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <GL/gl.h> 
+
+#include "primitiveStream.h"
+
+Int primStream::num_triangles()
+{
+  Int i;
+  Int ret=0;
+  for(i=0; i<index_lengths; i++)
+    {
+      ret += lengths[i]-2;
+    }
+  return ret;
+}
+
+	  
+
+/*the begining of inserting a new primitive. 
+ *reset counter to be 0.
+ */
+void primStream::begin()
+{
+  counter = 0;
+}
+
+void primStream::insert(Real u, Real v)
+{
+  /*if the space cannot hold u and v,
+   *we have to expand the array
+   */
+  if(index_vertices+1 >= size_vertices) {
+    Real* temp = (Real*) malloc (sizeof(Real) * (2*size_vertices + 2));
+    assert(temp);
+    
+    /*copy*/
+    for(Int i=0; i<index_vertices; i++)
+      temp[i] = vertices[i];
+    
+    free(vertices);
+    vertices = temp;
+    size_vertices = 2*size_vertices + 2;
+  }
+
+  vertices[index_vertices++] = u;
+  vertices[index_vertices++] = v;
+  counter++;
+}
+
+/*the end of a primitive.
+ *increase index_lengths 
+ */
+void primStream::end(Int type)
+{
+  Int i;
+  /*if there is no vertex in this primitive, 
+   *nothing needs to be done
+   */
+  if(counter == 0) return ;
+
+  if(index_lengths >= size_lengths){
+    Int* temp = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
+    assert(temp);
+    Int* tempTypes = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
+    assert(tempTypes);
+    
+    /*copy*/
+    for(i=0; i<index_lengths; i++){
+      temp[i] = lengths[i];
+      tempTypes[i] = types[i];
+    }
+    
+    free(lengths);
+    free(types);
+    lengths = temp;
+    types = tempTypes;
+    size_lengths = 2*size_lengths + 2;
+  }
+  lengths[index_lengths] = counter;
+  types[index_lengths] = type;
+  index_lengths++;
+}
+
+void primStream::print()
+{
+  Int i,j,k;
+  printf("index_lengths=%i,size_lengths=%i\n", index_lengths, size_lengths);
+  printf("index_vertices=%i,size_vertices=%i\n", index_vertices, size_vertices);
+  k=0;
+  for(i=0; i<index_lengths; i++)
+    {
+      if(types[i] == PRIMITIVE_STREAM_FAN)
+	printf("primitive-FAN:\n");
+      else 
+	printf("primitive-STRIP:\n");
+      for(j=0; j<lengths[i]; j++)
+	{
+	  printf("(%f,%f) ", vertices[k], vertices[k+1]);
+	  k += 2;	  
+	}
+      printf("\n");
+    }
+}
+
+primStream::primStream(Int sizeLengths, Int sizeVertices)
+{
+  lengths = (Int*)malloc (sizeof(Int) * sizeLengths);
+  assert(lengths);
+  types = (Int*)malloc (sizeof(Int) * sizeLengths);
+  assert(types);
+  
+  vertices = (Real*) malloc(sizeof(Real) * sizeVertices);
+  assert(vertices);
+  
+  index_lengths = 0;
+  index_vertices = 0;
+  size_lengths = sizeLengths;
+  size_vertices = sizeVertices; 
+}
+
+primStream::~primStream()
+{
+  free(lengths);
+  free(types);
+  free(vertices);
+}
+
+void primStream::draw()
+{
+  Int i,j,k;
+  k=0;
+  for(i=0; i<index_lengths; i++)
+    {
+      switch(types[i]){
+      case PRIMITIVE_STREAM_FAN:
+	glBegin(GL_TRIANGLE_FAN);
+	break;
+      case PRIMITIVE_STREAM_STRIP:
+	glBegin(GL_TRIANGLE_STRIP);
+	break;
+      }
+      
+      for(j=0; j<lengths[i]; j++){
+	glVertex2fv(vertices+k);
+	k += 2;
+      }
+      glEnd();
+    }
+}
+