New files to provide glEvalPoint, glEvalCoord implementations for

driver tnl modules.

1 files changed, 324 insertions, 0 deletions

diff --git a/src/mesa/main/api_eval.c b/src/mesa/main/api_eval.c
new file mode 100644
index 00000000000..f25ede9bdaf
--- /dev/null
+++ b/src/mesa/main/api_eval.c
@@ -0,0 +1,324 @@
+/* $Id: api_eval.c,v 1.1 2001/06/04 13:57:35 keithw Exp $ */
+
+/*
+ * 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 <[email protected]>
+ */
+
+#include "glheader.h"
+#include "api_eval.h"
+#include "context.h"
+#include "macros.h"
+#include "mmath.h"
+#include "math/m_eval.h"
+
+static void do_EvalCoord1f(GLcontext* ctx, GLfloat u)
+{
+
+   /** Color Index **/
+   if (ctx->Eval.Map1Index) 
+   {
+      GLfloat findex;
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Index;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, &findex, uu, 1, map->Order);
+      glIndexi( (GLint) findex );
+   }
+
+   /** Color **/
+   if (ctx->Eval.Map1Color4) {
+      GLfloat fcolor[4];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Color4;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, fcolor, uu, 4, map->Order);
+      glColor4fv( fcolor );
+   }
+
+   /** Normal Vector **/
+   if (ctx->Eval.Map1Normal) {
+      GLfloat normal[3];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Normal;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, normal, uu, 3, map->Order);
+      glNormal3fv( normal );
+   }
+
+   /** Texture Coordinates **/
+   if (ctx->Eval.Map1TextureCoord4) {
+      GLfloat texcoord[4];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Texture4;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, texcoord, uu, 4, map->Order);
+      glTexCoord4fv( texcoord );
+   }
+   else if (ctx->Eval.Map1TextureCoord3) {
+      GLfloat texcoord[4];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Texture3;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, texcoord, uu, 3, map->Order);
+      glTexCoord3fv( texcoord );
+   }
+   else if (ctx->Eval.Map1TextureCoord2) {
+      GLfloat texcoord[4];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Texture2;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, texcoord, uu, 2, map->Order);
+      glTexCoord2fv( texcoord );
+   }
+   else if (ctx->Eval.Map1TextureCoord1) {
+      GLfloat texcoord[4];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Texture1;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, texcoord, uu, 1, map->Order);
+      glTexCoord1fv( texcoord );
+   }
+  
+   /** Vertex **/
+   if (ctx->Eval.Map1Vertex4) 
+   {
+      GLfloat vertex[4];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Vertex4;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, vertex, uu, 4, map->Order);
+      glVertex4fv( vertex );
+   }
+   else if (ctx->Eval.Map1Vertex3) 
+   {
+      GLfloat vertex[4];
+      struct gl_1d_map *map = &ctx->EvalMap.Map1Vertex3;
+      GLfloat uu = (u - map->u1) * map->du;
+      _math_horner_bezier_curve(map->Points, vertex, uu, 3, map->Order);
+      glVertex3fv( vertex );
+   }
+}
+
+#define CROSS_PROD(n, u, v) \
+  (n)[0] = (u)[1]*(v)[2] - (u)[2]*(v)[1]; \
+  (n)[1] = (u)[2]*(v)[0] - (u)[0]*(v)[2]; \
+  (n)[2] = (u)[0]*(v)[1] - (u)[1]*(v)[0]
+
+
+static void do_EvalCoord2f( GLcontext* ctx, GLfloat u, GLfloat v )
+{   
+   /** Color Index **/
+   if (ctx->Eval.Map2Index) {
+      GLfloat findex;
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Index;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      _math_horner_bezier_surf(map->Points, &findex, uu, vv, 1,
+                         map->Uorder, map->Vorder);
+      glIndexi( (GLuint) (GLint) findex );
+   }
+
+   /** Color **/
+   if (ctx->Eval.Map2Color4) {
+      GLfloat fcolor[4];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Color4;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      _math_horner_bezier_surf(map->Points, fcolor, uu, vv, 4,
+                         map->Uorder, map->Vorder);
+      glColor4fv( fcolor );
+   }
+
+   /** Normal **/
+   if (ctx->Eval.Map2Normal &&
+       (!ctx->Eval.AutoNormal || (!ctx->Eval.Map2Vertex3 && 
+				  !ctx->Eval.Map2Vertex4))) {
+      GLfloat normal[3];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Normal;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      _math_horner_bezier_surf(map->Points, normal, uu, vv, 3,
+			 map->Uorder, map->Vorder);
+      glNormal3fv( normal );
+   }
+
+   /** Texture Coordinates **/
+   if (ctx->Eval.Map2TextureCoord4) {
+      GLfloat texcoord[4];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Texture4;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 4,
+                         map->Uorder, map->Vorder);
+      glTexCoord4fv( texcoord );
+   }
+   else if (ctx->Eval.Map2TextureCoord3) {
+      GLfloat texcoord[4];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Texture3;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 3,
+                         map->Uorder, map->Vorder);
+      glTexCoord3fv( texcoord );
+   }
+   else if (ctx->Eval.Map2TextureCoord2) {
+      GLfloat texcoord[4];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Texture2;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 2,
+                         map->Uorder, map->Vorder);
+      glTexCoord2fv( texcoord );
+   }
+   else if (ctx->Eval.Map2TextureCoord1) {
+      GLfloat texcoord[4];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Texture1;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      _math_horner_bezier_surf(map->Points, texcoord, uu, vv, 1,
+                         map->Uorder, map->Vorder);
+      glTexCoord1fv( texcoord );
+   }
+
+   /** Vertex **/
+   if(ctx->Eval.Map2Vertex4) {
+      GLfloat vertex[4];
+      GLfloat normal[3];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex4;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+
+      if (ctx->Eval.AutoNormal) {
+         GLfloat du[4], dv[4];
+
+         _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 4,
+				 map->Uorder, map->Vorder);
+
+         CROSS_PROD(normal, du, dv);
+         NORMALIZE_3FV(normal);
+      }
+      else {
+         _math_horner_bezier_surf(map->Points, vertex, uu, vv, 4,
+                            map->Uorder, map->Vorder);
+      }
+   }
+   else if (ctx->Eval.Map2Vertex3) {
+      GLfloat vertex[4];
+      struct gl_2d_map *map = &ctx->EvalMap.Map2Vertex3;
+      GLfloat uu = (u - map->u1) * map->du;
+      GLfloat vv = (v - map->v1) * map->dv;
+      if (ctx->Eval.AutoNormal) {
+         GLfloat du[3], dv[3];
+	 GLfloat normal[3];
+         _math_de_casteljau_surf(map->Points, vertex, du, dv, uu, vv, 3,
+				 map->Uorder, map->Vorder);
+         CROSS_PROD(normal, du, dv);
+         NORMALIZE_3FV(normal);
+	 glNormal3fv( normal );
+	 glVertex3fv( vertex );
+      }
+      else {
+         _math_horner_bezier_surf(map->Points, vertex, uu, vv, 3,
+                            map->Uorder, map->Vorder);
+	 glVertex3fv( vertex );
+      }
+   }
+}
+
+
+void _mesa_EvalPoint1( GLint i )
+{
+   GET_CURRENT_CONTEXT( ctx );
+   GLfloat du = ((ctx->Eval.MapGrid1u2 - ctx->Eval.MapGrid1u1) /
+		 (GLfloat) ctx->Eval.MapGrid1un);
+   GLfloat u = i * du + ctx->Eval.MapGrid1u1;
+
+   glEvalCoord1f( u );
+}
+
+
+void _mesa_EvalPoint2( GLint i, GLint j )
+{
+   GET_CURRENT_CONTEXT( ctx );
+   GLfloat du = ((ctx->Eval.MapGrid2u2 - ctx->Eval.MapGrid2u1) / 
+		 (GLfloat) ctx->Eval.MapGrid2un);
+   GLfloat dv = ((ctx->Eval.MapGrid2v2 - ctx->Eval.MapGrid2v1) / 
+		 (GLfloat) ctx->Eval.MapGrid2vn);
+   GLfloat u = i * du + ctx->Eval.MapGrid2u1;
+   GLfloat v = j * dv + ctx->Eval.MapGrid2v1;
+
+   glEvalCoord2f( u, v );
+}
+
+/* Wierd thing about eval is that it doesn't affect 'current' values.
+ * This technique of saving and resetting current values requires
+ * that: 
+ *
+ *   1) Current values are updated immediately in the glColor,
+ *   etc. functions.
+ *
+ *   2) Hardware color values are stored seperately from ctx->Current, 
+ *      for example in dma buffers, or direct emit to registers.
+ */
+void _mesa_EvalCoord1f( GLfloat u )
+{
+   GET_CURRENT_CONTEXT( ctx );
+   GLfloat normal[3], texcoord[4], color[4];
+   GLuint index;
+
+   COPY_3FV( normal, ctx->Current.Normal );
+   COPY_4FV( texcoord, ctx->Current.Texcoord[0] );
+   COPY_4FV( color, ctx->Current.Color );
+   index = ctx->Current.Index;
+
+   do_EvalCoord1f( ctx, u );
+
+   COPY_3FV( ctx->Current.Normal, normal );
+   COPY_4FV( ctx->Current.Texcoord[0], texcoord );
+   COPY_4FV( ctx->Current.Color, color );
+   ctx->Current.Index = index;
+}
+
+void _mesa_EvalCoord2f( GLfloat u, GLfloat v )
+{
+   GET_CURRENT_CONTEXT( ctx );
+   GLfloat normal[3], texcoord[4], color[4];
+   GLuint index;
+
+   COPY_3FV( normal, ctx->Current.Normal );
+   COPY_4FV( texcoord, ctx->Current.Texcoord[0] );
+   COPY_4FV( color, ctx->Current.Color );
+   index = ctx->Current.Index;
+
+   do_EvalCoord2f( ctx, u, v );
+
+   COPY_3FV( ctx->Current.Normal, normal );
+   COPY_4FV( ctx->Current.Texcoord[0], texcoord );
+   COPY_4FV( ctx->Current.Color, color );
+   ctx->Current.Index = index;
+}
+
+void _mesa_EvalCoord1fv( const GLfloat *u )
+{
+   glEvalCoord1f( u[0] );
+}
+
+void _mesa_EvalCoord2fv( const GLfloat *u )
+{
+   glEvalCoord2f( u[0], u[1] );
+}