From a0c4815433ccd57322f4f7703ca35e9ccfa59250 Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Thu, 8 Oct 2009 13:15:52 +0000
Subject: Added MesaLib-7.6

---
 mesalib/src/mesa/main/eval.c | 962 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 962 insertions(+)
 create mode 100644 mesalib/src/mesa/main/eval.c

(limited to 'mesalib/src/mesa/main/eval.c')

diff --git a/mesalib/src/mesa/main/eval.c b/mesalib/src/mesa/main/eval.c
new file mode 100644
index 000000000..3f89f9c1e
--- /dev/null
+++ b/mesalib/src/mesa/main/eval.c
@@ -0,0 +1,962 @@
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  5.1
+ *
+ * Copyright (C) 1999-2003  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.
+ */
+
+
+/*
+ * eval.c was written by
+ * Bernd Barsuhn (bdbarsuh@cip.informatik.uni-erlangen.de) and
+ * Volker Weiss (vrweiss@cip.informatik.uni-erlangen.de).
+ *
+ * My original implementation of evaluators was simplistic and didn't
+ * compute surface normal vectors properly.  Bernd and Volker applied
+ * used more sophisticated methods to get better results.
+ *
+ * Thanks guys!
+ */
+
+
+#include "glheader.h"
+#include "imports.h"
+#include "colormac.h"
+#include "context.h"
+#include "eval.h"
+#include "macros.h"
+#include "mtypes.h"
+
+
+/*
+ * Return the number of components per control point for any type of
+ * evaluator.  Return 0 if bad target.
+ * See table 5.1 in the OpenGL 1.2 spec.
+ */
+GLuint _mesa_evaluator_components( GLenum target )
+{
+   switch (target) {
+      case GL_MAP1_VERTEX_3:		return 3;
+      case GL_MAP1_VERTEX_4:		return 4;
+      case GL_MAP1_INDEX:		return 1;
+      case GL_MAP1_COLOR_4:		return 4;
+      case GL_MAP1_NORMAL:		return 3;
+      case GL_MAP1_TEXTURE_COORD_1:	return 1;
+      case GL_MAP1_TEXTURE_COORD_2:	return 2;
+      case GL_MAP1_TEXTURE_COORD_3:	return 3;
+      case GL_MAP1_TEXTURE_COORD_4:	return 4;
+      case GL_MAP2_VERTEX_3:		return 3;
+      case GL_MAP2_VERTEX_4:		return 4;
+      case GL_MAP2_INDEX:		return 1;
+      case GL_MAP2_COLOR_4:		return 4;
+      case GL_MAP2_NORMAL:		return 3;
+      case GL_MAP2_TEXTURE_COORD_1:	return 1;
+      case GL_MAP2_TEXTURE_COORD_2:	return 2;
+      case GL_MAP2_TEXTURE_COORD_3:	return 3;
+      case GL_MAP2_TEXTURE_COORD_4:	return 4;
+      default:				break;
+   }
+
+   /* XXX need to check for the vertex program extension
+   if (!ctx->Extensions.NV_vertex_program)
+      return 0;
+   */
+
+   if (target >= GL_MAP1_VERTEX_ATTRIB0_4_NV &&
+       target <= GL_MAP1_VERTEX_ATTRIB15_4_NV)
+      return 4;
+
+   if (target >= GL_MAP2_VERTEX_ATTRIB0_4_NV &&
+       target <= GL_MAP2_VERTEX_ATTRIB15_4_NV)
+      return 4;
+
+   return 0;
+}
+
+
+/*
+ * Return pointer to the gl_1d_map struct for the named target.
+ */
+static struct gl_1d_map *
+get_1d_map( GLcontext *ctx, GLenum target )
+{
+   switch (target) {
+      case GL_MAP1_VERTEX_3:
+         return &ctx->EvalMap.Map1Vertex3;
+      case GL_MAP1_VERTEX_4:
+         return &ctx->EvalMap.Map1Vertex4;
+      case GL_MAP1_INDEX:
+         return &ctx->EvalMap.Map1Index;
+      case GL_MAP1_COLOR_4:
+         return &ctx->EvalMap.Map1Color4;
+      case GL_MAP1_NORMAL:
+         return &ctx->EvalMap.Map1Normal;
+      case GL_MAP1_TEXTURE_COORD_1:
+         return &ctx->EvalMap.Map1Texture1;
+      case GL_MAP1_TEXTURE_COORD_2:
+         return &ctx->EvalMap.Map1Texture2;
+      case GL_MAP1_TEXTURE_COORD_3:
+         return &ctx->EvalMap.Map1Texture3;
+      case GL_MAP1_TEXTURE_COORD_4:
+         return &ctx->EvalMap.Map1Texture4;
+      case GL_MAP1_VERTEX_ATTRIB0_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB1_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB2_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB3_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB4_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB5_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB6_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB7_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB8_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB9_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB10_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB11_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB12_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB13_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB14_4_NV:
+      case GL_MAP1_VERTEX_ATTRIB15_4_NV:
+         if (!ctx->Extensions.NV_vertex_program)
+            return NULL;
+         return &ctx->EvalMap.Map1Attrib[target - GL_MAP1_VERTEX_ATTRIB0_4_NV];
+      default:
+         return NULL;
+   }
+}
+
+
+/*
+ * Return pointer to the gl_2d_map struct for the named target.
+ */
+static struct gl_2d_map *
+get_2d_map( GLcontext *ctx, GLenum target )
+{
+   switch (target) {
+      case GL_MAP2_VERTEX_3:
+         return &ctx->EvalMap.Map2Vertex3;
+      case GL_MAP2_VERTEX_4:
+         return &ctx->EvalMap.Map2Vertex4;
+      case GL_MAP2_INDEX:
+         return &ctx->EvalMap.Map2Index;
+      case GL_MAP2_COLOR_4:
+         return &ctx->EvalMap.Map2Color4;
+      case GL_MAP2_NORMAL:
+         return &ctx->EvalMap.Map2Normal;
+      case GL_MAP2_TEXTURE_COORD_1:
+         return &ctx->EvalMap.Map2Texture1;
+      case GL_MAP2_TEXTURE_COORD_2:
+         return &ctx->EvalMap.Map2Texture2;
+      case GL_MAP2_TEXTURE_COORD_3:
+         return &ctx->EvalMap.Map2Texture3;
+      case GL_MAP2_TEXTURE_COORD_4:
+         return &ctx->EvalMap.Map2Texture4;
+      case GL_MAP2_VERTEX_ATTRIB0_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB1_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB2_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB3_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB4_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB5_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB6_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB7_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB8_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB9_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB10_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB11_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB12_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB13_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB14_4_NV:
+      case GL_MAP2_VERTEX_ATTRIB15_4_NV:
+         if (!ctx->Extensions.NV_vertex_program)
+            return NULL;
+         return &ctx->EvalMap.Map2Attrib[target - GL_MAP2_VERTEX_ATTRIB0_4_NV];
+      default:
+         return NULL;
+   }
+}
+
+
+/**********************************************************************/
+/***            Copy and deallocate control points                  ***/
+/**********************************************************************/
+
+
+/*
+ * Copy 1-parametric evaluator control points from user-specified
+ * memory space to a buffer of contiguous control points.
+ * \param see glMap1f for details
+ * \return pointer to buffer of contiguous control points or NULL if out
+ *          of memory.
+ */
+GLfloat *_mesa_copy_map_points1f( GLenum target, GLint ustride, GLint uorder,
+                                  const GLfloat *points )
+{
+   GLfloat *buffer, *p;
+   GLint i, k, size = _mesa_evaluator_components(target);
+
+   if (!points || !size)
+      return NULL;
+
+   buffer = (GLfloat *) MALLOC(uorder * size * sizeof(GLfloat));
+
+   if (buffer)
+      for (i = 0, p = buffer; i < uorder; i++, points += ustride)
+	for (k = 0; k < size; k++)
+	  *p++ = points[k];
+
+   return buffer;
+}
+
+
+
+/*
+ * Same as above but convert doubles to floats.
+ */
+GLfloat *_mesa_copy_map_points1d( GLenum target, GLint ustride, GLint uorder,
+                                  const GLdouble *points )
+{
+   GLfloat *buffer, *p;
+   GLint i, k, size = _mesa_evaluator_components(target);
+
+   if (!points || !size)
+      return NULL;
+
+   buffer = (GLfloat *) MALLOC(uorder * size * sizeof(GLfloat));
+
+   if (buffer)
+      for (i = 0, p = buffer; i < uorder; i++, points += ustride)
+	for (k = 0; k < size; k++)
+	  *p++ = (GLfloat) points[k];
+
+   return buffer;
+}
+
+
+
+/*
+ * Copy 2-parametric evaluator control points from user-specified
+ * memory space to a buffer of contiguous control points.
+ * Additional memory is allocated to be used by the horner and
+ * de Casteljau evaluation schemes.
+ *
+ * \param see glMap2f for details
+ * \return pointer to buffer of contiguous control points or NULL if out
+ *          of memory.
+ */
+GLfloat *_mesa_copy_map_points2f( GLenum target,
+                                  GLint ustride, GLint uorder,
+                                  GLint vstride, GLint vorder,
+                                  const GLfloat *points )
+{
+   GLfloat *buffer, *p;
+   GLint i, j, k, size, dsize, hsize;
+   GLint uinc;
+
+   size = _mesa_evaluator_components(target);
+
+   if (!points || size==0) {
+      return NULL;
+   }
+
+   /* max(uorder, vorder) additional points are used in      */
+   /* horner evaluation and uorder*vorder additional */
+   /* values are needed for de Casteljau                     */
+   dsize = (uorder == 2 && vorder == 2)? 0 : uorder*vorder;
+   hsize = (uorder > vorder ? uorder : vorder)*size;
+
+   if(hsize>dsize)
+     buffer = (GLfloat *) MALLOC((uorder*vorder*size+hsize)*sizeof(GLfloat));
+   else
+     buffer = (GLfloat *) MALLOC((uorder*vorder*size+dsize)*sizeof(GLfloat));
+
+   /* compute the increment value for the u-loop */
+   uinc = ustride - vorder*vstride;
+
+   if (buffer)
+      for (i=0, p=buffer; i<uorder; i++, points += uinc)
+	 for (j=0; j<vorder; j++, points += vstride)
+	    for (k=0; k<size; k++)
+	       *p++ = points[k];
+
+   return buffer;
+}
+
+
+
+/*
+ * Same as above but convert doubles to floats.
+ */
+GLfloat *_mesa_copy_map_points2d(GLenum target,
+                                 GLint ustride, GLint uorder,
+                                 GLint vstride, GLint vorder,
+                                 const GLdouble *points )
+{
+   GLfloat *buffer, *p;
+   GLint i, j, k, size, hsize, dsize;
+   GLint uinc;
+
+   size = _mesa_evaluator_components(target);
+
+   if (!points || size==0) {
+      return NULL;
+   }
+
+   /* max(uorder, vorder) additional points are used in      */
+   /* horner evaluation and uorder*vorder additional */
+   /* values are needed for de Casteljau                     */
+   dsize = (uorder == 2 && vorder == 2)? 0 : uorder*vorder;
+   hsize = (uorder > vorder ? uorder : vorder)*size;
+
+   if(hsize>dsize)
+     buffer = (GLfloat *) MALLOC((uorder*vorder*size+hsize)*sizeof(GLfloat));
+   else
+     buffer = (GLfloat *) MALLOC((uorder*vorder*size+dsize)*sizeof(GLfloat));
+
+   /* compute the increment value for the u-loop */
+   uinc = ustride - vorder*vstride;
+
+   if (buffer)
+      for (i=0, p=buffer; i<uorder; i++, points += uinc)
+	 for (j=0; j<vorder; j++, points += vstride)
+	    for (k=0; k<size; k++)
+	       *p++ = (GLfloat) points[k];
+
+   return buffer;
+}
+
+
+
+
+/**********************************************************************/
+/***                      API entry points                          ***/
+/**********************************************************************/
+
+
+/*
+ * This does the work of glMap1[fd].
+ */
+static void
+map1(GLenum target, GLfloat u1, GLfloat u2, GLint ustride,
+     GLint uorder, const GLvoid *points, GLenum type )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint k;
+   GLfloat *pnts;
+   struct gl_1d_map *map = NULL;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   ASSERT(type == GL_FLOAT || type == GL_DOUBLE);
+
+   if (u1 == u2) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap1(u1,u2)" );
+      return;
+   }
+   if (uorder < 1 || uorder > MAX_EVAL_ORDER) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap1(order)" );
+      return;
+   }
+   if (!points) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap1(points)" );
+      return;
+   }
+
+   k = _mesa_evaluator_components( target );
+   if (k == 0) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glMap1(target)" );
+   }
+
+   if (ustride < k) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap1(stride)" );
+      return;
+   }
+
+   if (ctx->Texture.CurrentUnit != 0) {
+      /* See OpenGL 1.2.1 spec, section F.2.13 */
+      _mesa_error( ctx, GL_INVALID_OPERATION, "glMap2(ACTIVE_TEXTURE != 0)" );
+      return;
+   }
+
+   map = get_1d_map(ctx, target);
+   if (!map) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glMap1(target)" );
+      return;
+   }
+
+   /* make copy of the control points */
+   if (type == GL_FLOAT)
+      pnts = _mesa_copy_map_points1f(target, ustride, uorder, (GLfloat*) points);
+   else
+      pnts = _mesa_copy_map_points1d(target, ustride, uorder, (GLdouble*) points);
+
+
+   FLUSH_VERTICES(ctx, _NEW_EVAL);
+   map->Order = uorder;
+   map->u1 = u1;
+   map->u2 = u2;
+   map->du = 1.0F / (u2 - u1);
+   if (map->Points)
+      FREE( map->Points );
+   map->Points = pnts;
+}
+
+
+
+void GLAPIENTRY
+_mesa_Map1f( GLenum target, GLfloat u1, GLfloat u2, GLint stride,
+             GLint order, const GLfloat *points )
+{
+   map1(target, u1, u2, stride, order, points, GL_FLOAT);
+}
+
+
+void GLAPIENTRY
+_mesa_Map1d( GLenum target, GLdouble u1, GLdouble u2, GLint stride,
+             GLint order, const GLdouble *points )
+{
+   map1(target, (GLfloat) u1, (GLfloat) u2, stride, order, points, GL_DOUBLE);
+}
+
+
+static void
+map2( GLenum target, GLfloat u1, GLfloat u2, GLint ustride, GLint uorder,
+      GLfloat v1, GLfloat v2, GLint vstride, GLint vorder,
+      const GLvoid *points, GLenum type )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLint k;
+   GLfloat *pnts;
+   struct gl_2d_map *map = NULL;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+   ASSERT(type == GL_FLOAT || type == GL_DOUBLE);
+
+   if (u1==u2) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap2(u1,u2)" );
+      return;
+   }
+
+   if (v1==v2) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap2(v1,v2)" );
+      return;
+   }
+
+   if (uorder<1 || uorder>MAX_EVAL_ORDER) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap2(uorder)" );
+      return;
+   }
+
+   if (vorder<1 || vorder>MAX_EVAL_ORDER) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap2(vorder)" );
+      return;
+   }
+
+   k = _mesa_evaluator_components( target );
+   if (k==0) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glMap2(target)" );
+   }
+
+   if (ustride < k) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap2(ustride)" );
+      return;
+   }
+   if (vstride < k) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMap2(vstride)" );
+      return;
+   }
+
+   if (ctx->Texture.CurrentUnit != 0) {
+      /* See OpenGL 1.2.1 spec, section F.2.13 */
+      _mesa_error( ctx, GL_INVALID_OPERATION, "glMap2(ACTIVE_TEXTURE != 0)" );
+      return;
+   }
+
+   map = get_2d_map(ctx, target);
+   if (!map) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glMap2(target)" );
+      return;
+   }
+
+   /* make copy of the control points */
+   if (type == GL_FLOAT)
+      pnts = _mesa_copy_map_points2f(target, ustride, uorder,
+                                  vstride, vorder, (GLfloat*) points);
+   else
+      pnts = _mesa_copy_map_points2d(target, ustride, uorder,
+                                  vstride, vorder, (GLdouble*) points);
+
+
+   FLUSH_VERTICES(ctx, _NEW_EVAL);
+   map->Uorder = uorder;
+   map->u1 = u1;
+   map->u2 = u2;
+   map->du = 1.0F / (u2 - u1);
+   map->Vorder = vorder;
+   map->v1 = v1;
+   map->v2 = v2;
+   map->dv = 1.0F / (v2 - v1);
+   if (map->Points)
+      FREE( map->Points );
+   map->Points = pnts;
+}
+
+
+void GLAPIENTRY
+_mesa_Map2f( GLenum target,
+             GLfloat u1, GLfloat u2, GLint ustride, GLint uorder,
+             GLfloat v1, GLfloat v2, GLint vstride, GLint vorder,
+             const GLfloat *points)
+{
+   map2(target, u1, u2, ustride, uorder, v1, v2, vstride, vorder,
+        points, GL_FLOAT);
+}
+
+
+void GLAPIENTRY
+_mesa_Map2d( GLenum target,
+             GLdouble u1, GLdouble u2, GLint ustride, GLint uorder,
+             GLdouble v1, GLdouble v2, GLint vstride, GLint vorder,
+             const GLdouble *points )
+{
+   map2(target, (GLfloat) u1, (GLfloat) u2, ustride, uorder, 
+	(GLfloat) v1, (GLfloat) v2, vstride, vorder, points, GL_DOUBLE);
+}
+
+
+
+void GLAPIENTRY
+_mesa_GetMapdv( GLenum target, GLenum query, GLdouble *v )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_1d_map *map1d;
+   struct gl_2d_map *map2d;
+   GLint i, n;
+   GLfloat *data;
+   GLuint comps;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   comps = _mesa_evaluator_components(target);
+   if (!comps) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetMapdv(target)" );
+      return;
+   }
+
+   map1d = get_1d_map(ctx, target);
+   map2d = get_2d_map(ctx, target);
+   ASSERT(map1d || map2d);
+
+   switch (query) {
+      case GL_COEFF:
+         if (map1d) {
+            data = map1d->Points;
+            n = map1d->Order * comps;
+         }
+         else {
+            data = map2d->Points;
+            n = map2d->Uorder * map2d->Vorder * comps;
+         }
+	 if (data) {
+	    for (i=0;i<n;i++) {
+	       v[i] = data[i];
+	    }
+	 }
+         break;
+      case GL_ORDER:
+         if (map1d) {
+            v[0] = (GLdouble) map1d->Order;
+         }
+         else {
+            v[0] = (GLdouble) map2d->Uorder;
+            v[1] = (GLdouble) map2d->Vorder;
+         }
+         break;
+      case GL_DOMAIN:
+         if (map1d) {
+            v[0] = (GLdouble) map1d->u1;
+            v[1] = (GLdouble) map1d->u2;
+         }
+         else {
+            v[0] = (GLdouble) map2d->u1;
+            v[1] = (GLdouble) map2d->u2;
+            v[2] = (GLdouble) map2d->v1;
+            v[3] = (GLdouble) map2d->v2;
+         }
+         break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetMapdv(query)" );
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetMapfv( GLenum target, GLenum query, GLfloat *v )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_1d_map *map1d;
+   struct gl_2d_map *map2d;
+   GLint i, n;
+   GLfloat *data;
+   GLuint comps;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   comps = _mesa_evaluator_components(target);
+   if (!comps) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetMapfv(target)" );
+      return;
+   }
+
+   map1d = get_1d_map(ctx, target);
+   map2d = get_2d_map(ctx, target);
+   ASSERT(map1d || map2d);
+
+   switch (query) {
+      case GL_COEFF:
+         if (map1d) {
+            data = map1d->Points;
+            n = map1d->Order * comps;
+         }
+         else {
+            data = map2d->Points;
+            n = map2d->Uorder * map2d->Vorder * comps;
+         }
+	 if (data) {
+	    for (i=0;i<n;i++) {
+	       v[i] = data[i];
+	    }
+	 }
+         break;
+      case GL_ORDER:
+         if (map1d) {
+            v[0] = (GLfloat) map1d->Order;
+         }
+         else {
+            v[0] = (GLfloat) map2d->Uorder;
+            v[1] = (GLfloat) map2d->Vorder;
+         }
+         break;
+      case GL_DOMAIN:
+         if (map1d) {
+            v[0] = map1d->u1;
+            v[1] = map1d->u2;
+         }
+         else {
+            v[0] = map2d->u1;
+            v[1] = map2d->u2;
+            v[2] = map2d->v1;
+            v[3] = map2d->v2;
+         }
+         break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetMapfv(query)" );
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetMapiv( GLenum target, GLenum query, GLint *v )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_1d_map *map1d;
+   struct gl_2d_map *map2d;
+   GLuint i, n;
+   GLfloat *data;
+   GLuint comps;
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   comps = _mesa_evaluator_components(target);
+   if (!comps) {
+      _mesa_error( ctx, GL_INVALID_ENUM, "glGetMapiv(target)" );
+      return;
+   }
+
+   map1d = get_1d_map(ctx, target);
+   map2d = get_2d_map(ctx, target);
+   ASSERT(map1d || map2d);
+
+   switch (query) {
+      case GL_COEFF:
+         if (map1d) {
+            data = map1d->Points;
+            n = map1d->Order * comps;
+         }
+         else {
+            data = map2d->Points;
+            n = map2d->Uorder * map2d->Vorder * comps;
+         }
+	 if (data) {
+	    for (i=0;i<n;i++) {
+	       v[i] = IROUND(data[i]);
+	    }
+	 }
+         break;
+      case GL_ORDER:
+         if (map1d) {
+            v[0] = map1d->Order;
+         }
+         else {
+            v[0] = map2d->Uorder;
+            v[1] = map2d->Vorder;
+         }
+         break;
+      case GL_DOMAIN:
+         if (map1d) {
+            v[0] = IROUND(map1d->u1);
+            v[1] = IROUND(map1d->u2);
+         }
+         else {
+            v[0] = IROUND(map2d->u1);
+            v[1] = IROUND(map2d->u2);
+            v[2] = IROUND(map2d->v1);
+            v[3] = IROUND(map2d->v2);
+         }
+         break;
+      default:
+         _mesa_error( ctx, GL_INVALID_ENUM, "glGetMapiv(query)" );
+   }
+}
+
+
+
+void GLAPIENTRY
+_mesa_MapGrid1f( GLint un, GLfloat u1, GLfloat u2 )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (un<1) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMapGrid1f" );
+      return;
+   }
+   FLUSH_VERTICES(ctx, _NEW_EVAL);
+   ctx->Eval.MapGrid1un = un;
+   ctx->Eval.MapGrid1u1 = u1;
+   ctx->Eval.MapGrid1u2 = u2;
+   ctx->Eval.MapGrid1du = (u2 - u1) / (GLfloat) un;
+}
+
+
+void GLAPIENTRY
+_mesa_MapGrid1d( GLint un, GLdouble u1, GLdouble u2 )
+{
+   _mesa_MapGrid1f( un, (GLfloat) u1, (GLfloat) u2 );
+}
+
+
+void GLAPIENTRY
+_mesa_MapGrid2f( GLint un, GLfloat u1, GLfloat u2,
+                 GLint vn, GLfloat v1, GLfloat v2 )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (un<1) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMapGrid2f(un)" );
+      return;
+   }
+   if (vn<1) {
+      _mesa_error( ctx, GL_INVALID_VALUE, "glMapGrid2f(vn)" );
+      return;
+   }
+
+   FLUSH_VERTICES(ctx, _NEW_EVAL);
+   ctx->Eval.MapGrid2un = un;
+   ctx->Eval.MapGrid2u1 = u1;
+   ctx->Eval.MapGrid2u2 = u2;
+   ctx->Eval.MapGrid2du = (u2 - u1) / (GLfloat) un;
+   ctx->Eval.MapGrid2vn = vn;
+   ctx->Eval.MapGrid2v1 = v1;
+   ctx->Eval.MapGrid2v2 = v2;
+   ctx->Eval.MapGrid2dv = (v2 - v1) / (GLfloat) vn;
+}
+
+
+void GLAPIENTRY
+_mesa_MapGrid2d( GLint un, GLdouble u1, GLdouble u2,
+                 GLint vn, GLdouble v1, GLdouble v2 )
+{
+   _mesa_MapGrid2f( un, (GLfloat) u1, (GLfloat) u2, 
+		    vn, (GLfloat) v1, (GLfloat) v2 );
+}
+
+
+
+/**********************************************************************/
+/*****                      Initialization                        *****/
+/**********************************************************************/
+
+/**
+ * Initialize a 1-D evaluator map.
+ */
+static void
+init_1d_map( struct gl_1d_map *map, int n, const float *initial )
+{
+   map->Order = 1;
+   map->u1 = 0.0;
+   map->u2 = 1.0;
+   map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
+   if (map->Points) {
+      GLint i;
+      for (i=0;i<n;i++)
+         map->Points[i] = initial[i];
+   }
+}
+
+
+/**
+ * Initialize a 2-D evaluator map 
+ */
+static void
+init_2d_map( struct gl_2d_map *map, int n, const float *initial )
+{
+   map->Uorder = 1;
+   map->Vorder = 1;
+   map->u1 = 0.0;
+   map->u2 = 1.0;
+   map->v1 = 0.0;
+   map->v2 = 1.0;
+   map->Points = (GLfloat *) MALLOC(n * sizeof(GLfloat));
+   if (map->Points) {
+      GLint i;
+      for (i=0;i<n;i++)
+         map->Points[i] = initial[i];
+   }
+}
+
+
+void _mesa_init_eval( GLcontext *ctx )
+{
+   int i;
+
+   /* Evaluators group */
+   ctx->Eval.Map1Color4 = GL_FALSE;
+   ctx->Eval.Map1Index = GL_FALSE;
+   ctx->Eval.Map1Normal = GL_FALSE;
+   ctx->Eval.Map1TextureCoord1 = GL_FALSE;
+   ctx->Eval.Map1TextureCoord2 = GL_FALSE;
+   ctx->Eval.Map1TextureCoord3 = GL_FALSE;
+   ctx->Eval.Map1TextureCoord4 = GL_FALSE;
+   ctx->Eval.Map1Vertex3 = GL_FALSE;
+   ctx->Eval.Map1Vertex4 = GL_FALSE;
+   MEMSET(ctx->Eval.Map1Attrib, 0, sizeof(ctx->Eval.Map1Attrib));
+   ctx->Eval.Map2Color4 = GL_FALSE;
+   ctx->Eval.Map2Index = GL_FALSE;
+   ctx->Eval.Map2Normal = GL_FALSE;
+   ctx->Eval.Map2TextureCoord1 = GL_FALSE;
+   ctx->Eval.Map2TextureCoord2 = GL_FALSE;
+   ctx->Eval.Map2TextureCoord3 = GL_FALSE;
+   ctx->Eval.Map2TextureCoord4 = GL_FALSE;
+   ctx->Eval.Map2Vertex3 = GL_FALSE;
+   ctx->Eval.Map2Vertex4 = GL_FALSE;
+   MEMSET(ctx->Eval.Map2Attrib, 0, sizeof(ctx->Eval.Map2Attrib));
+   ctx->Eval.AutoNormal = GL_FALSE;
+   ctx->Eval.MapGrid1un = 1;
+   ctx->Eval.MapGrid1u1 = 0.0;
+   ctx->Eval.MapGrid1u2 = 1.0;
+   ctx->Eval.MapGrid2un = 1;
+   ctx->Eval.MapGrid2vn = 1;
+   ctx->Eval.MapGrid2u1 = 0.0;
+   ctx->Eval.MapGrid2u2 = 1.0;
+   ctx->Eval.MapGrid2v1 = 0.0;
+   ctx->Eval.MapGrid2v2 = 1.0;
+
+   /* Evaluator data */
+   {
+      static GLfloat vertex[4] = { 0.0, 0.0, 0.0, 1.0 };
+      static GLfloat normal[3] = { 0.0, 0.0, 1.0 };
+      static GLfloat index[1] = { 1.0 };
+      static GLfloat color[4] = { 1.0, 1.0, 1.0, 1.0 };
+      static GLfloat texcoord[4] = { 0.0, 0.0, 0.0, 1.0 };
+      static GLfloat attrib[4] = { 0.0, 0.0, 0.0, 1.0 };
+
+      init_1d_map( &ctx->EvalMap.Map1Vertex3, 3, vertex );
+      init_1d_map( &ctx->EvalMap.Map1Vertex4, 4, vertex );
+      init_1d_map( &ctx->EvalMap.Map1Index, 1, index );
+      init_1d_map( &ctx->EvalMap.Map1Color4, 4, color );
+      init_1d_map( &ctx->EvalMap.Map1Normal, 3, normal );
+      init_1d_map( &ctx->EvalMap.Map1Texture1, 1, texcoord );
+      init_1d_map( &ctx->EvalMap.Map1Texture2, 2, texcoord );
+      init_1d_map( &ctx->EvalMap.Map1Texture3, 3, texcoord );
+      init_1d_map( &ctx->EvalMap.Map1Texture4, 4, texcoord );
+      for (i = 0; i < 16; i++)
+         init_1d_map( ctx->EvalMap.Map1Attrib + i, 4, attrib );
+
+      init_2d_map( &ctx->EvalMap.Map2Vertex3, 3, vertex );
+      init_2d_map( &ctx->EvalMap.Map2Vertex4, 4, vertex );
+      init_2d_map( &ctx->EvalMap.Map2Index, 1, index );
+      init_2d_map( &ctx->EvalMap.Map2Color4, 4, color );
+      init_2d_map( &ctx->EvalMap.Map2Normal, 3, normal );
+      init_2d_map( &ctx->EvalMap.Map2Texture1, 1, texcoord );
+      init_2d_map( &ctx->EvalMap.Map2Texture2, 2, texcoord );
+      init_2d_map( &ctx->EvalMap.Map2Texture3, 3, texcoord );
+      init_2d_map( &ctx->EvalMap.Map2Texture4, 4, texcoord );
+      for (i = 0; i < 16; i++)
+         init_2d_map( ctx->EvalMap.Map2Attrib + i, 4, attrib );
+   }
+}
+
+
+void _mesa_free_eval_data( GLcontext *ctx )
+{
+   int i;
+
+   /* Free evaluator data */
+   if (ctx->EvalMap.Map1Vertex3.Points)
+      FREE( ctx->EvalMap.Map1Vertex3.Points );
+   if (ctx->EvalMap.Map1Vertex4.Points)
+      FREE( ctx->EvalMap.Map1Vertex4.Points );
+   if (ctx->EvalMap.Map1Index.Points)
+      FREE( ctx->EvalMap.Map1Index.Points );
+   if (ctx->EvalMap.Map1Color4.Points)
+      FREE( ctx->EvalMap.Map1Color4.Points );
+   if (ctx->EvalMap.Map1Normal.Points)
+      FREE( ctx->EvalMap.Map1Normal.Points );
+   if (ctx->EvalMap.Map1Texture1.Points)
+      FREE( ctx->EvalMap.Map1Texture1.Points );
+   if (ctx->EvalMap.Map1Texture2.Points)
+      FREE( ctx->EvalMap.Map1Texture2.Points );
+   if (ctx->EvalMap.Map1Texture3.Points)
+      FREE( ctx->EvalMap.Map1Texture3.Points );
+   if (ctx->EvalMap.Map1Texture4.Points)
+      FREE( ctx->EvalMap.Map1Texture4.Points );
+   for (i = 0; i < 16; i++)
+      FREE((ctx->EvalMap.Map1Attrib[i].Points));
+
+   if (ctx->EvalMap.Map2Vertex3.Points)
+      FREE( ctx->EvalMap.Map2Vertex3.Points );
+   if (ctx->EvalMap.Map2Vertex4.Points)
+      FREE( ctx->EvalMap.Map2Vertex4.Points );
+   if (ctx->EvalMap.Map2Index.Points)
+      FREE( ctx->EvalMap.Map2Index.Points );
+   if (ctx->EvalMap.Map2Color4.Points)
+      FREE( ctx->EvalMap.Map2Color4.Points );
+   if (ctx->EvalMap.Map2Normal.Points)
+      FREE( ctx->EvalMap.Map2Normal.Points );
+   if (ctx->EvalMap.Map2Texture1.Points)
+      FREE( ctx->EvalMap.Map2Texture1.Points );
+   if (ctx->EvalMap.Map2Texture2.Points)
+      FREE( ctx->EvalMap.Map2Texture2.Points );
+   if (ctx->EvalMap.Map2Texture3.Points)
+      FREE( ctx->EvalMap.Map2Texture3.Points );
+   if (ctx->EvalMap.Map2Texture4.Points)
+      FREE( ctx->EvalMap.Map2Texture4.Points );
+   for (i = 0; i < 16; i++)
+      FREE((ctx->EvalMap.Map2Attrib[i].Points));
+}
-- 
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