Initial import.

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diff --git a/src/mesa/tnl/t_context.h b/src/mesa/tnl/t_context.h
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+/*
+ * mesa 3-D graphics library
+ * Version:  6.2.2
+ *
+ * Copyright (C) 1999-2005  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.
+ */
+
+/**
+ * \file t_context.h
+ * \brief TnL module datatypes and definitions.
+ * \author Keith Whitwell
+ */
+
+
+/**
+ * \mainpage The TNL-module
+ *
+ * TNL stands for "transform and lighting", i.e. this module implements
+ * a pipeline that receives as input a buffer of vertices and does all
+ * necessary transformations (rotations, clipping, vertex shader etc.)
+ * and passes then the output to the rasterizer.
+ *
+ * The tnl_pipeline contains the array of all stages, which should be
+ * applied. Each stage is a black-box, which is described by an
+ * tnl_pipeline_stage. The function ::_tnl_run_pipeline applies all the
+ * stages to the vertex_buffer TNLcontext::vb, where the vertex data
+ * is stored. The last stage in the pipeline is the rasterizer.
+ *
+ * The initial vertex_buffer data may either come from an ::immediate
+ * structure or client vertex_arrays or display lists:
+ *
+ *
+ * - The ::immediate structure records all the GL commands issued between
+ * glBegin and glEnd.  \n
+ * The structure accumulates data, until it is either full or it is
+ * flushed (usually by a state change). Before starting then the pipeline,
+ * the collected vertex data in ::immediate has to be pushed into
+ * TNLcontext::vb.
+ * This happens in ::_tnl_vb_bind_immediate. The pipeline is then run by
+ * calling tnl_device_driver::RunPipeline = ::_tnl_run_pipeline, which
+ * is stored in TNLcontext::Driver.   \n
+ * An ::immediate does (for performance reasons) usually not finish with a
+ * glEnd, and hence it also does not need to start with a glBegin.
+ * This means that the last vertices of one ::immediate may need to be
+ * saved for the next one.
+ *
+ *
+ * - NOT SURE ABOUT THIS: The vertex_arrays structure is used to handle
+ * glDrawArrays etc.  \n
+ * Here, the data of the vertex_arrays is copied by ::_tnl_vb_bind_arrays
+ * into TNLcontext::vb, so that the pipeline can be started.
+ */
+
+
+#ifndef _T_CONTEXT_H
+#define _T_CONTEXT_H
+
+#include "glheader.h"
+#include "mtypes.h"
+
+#include "math/m_matrix.h"
+#include "math/m_vector.h"
+#include "math/m_xform.h"
+
+
+#define MAX_PIPELINE_STAGES     30
+
+
+/*
+ * Note: The first attributes match the VERT_ATTRIB_* definitions
+ * in mtypes.h.  However, the tnl module has additional attributes
+ * for materials, color indexes, edge flags, etc.
+ */
+/* Note: These are currently being used to define both inputs and
+ * outputs from the tnl pipeline.  A better solution (which would also
+ * releive the congestion to slightly prolong the life of the bitmask
+ * below) is to have the fixed function pipeline populate a set of
+ * arrays named after those produced by the vertex program stage, and
+ * have the rest the mesa backend work on those.
+ */
+enum {
+	_TNL_ATTRIB_POS = 0,
+	_TNL_ATTRIB_WEIGHT = 1,
+	_TNL_ATTRIB_NORMAL = 2,
+	_TNL_ATTRIB_COLOR0 = 3,
+	_TNL_ATTRIB_COLOR1 = 4,
+	_TNL_ATTRIB_FOG = 5,
+	_TNL_ATTRIB_SIX = 6,
+	_TNL_ATTRIB_SEVEN = 7,
+	_TNL_ATTRIB_TEX0 = 8,
+	_TNL_ATTRIB_TEX1 = 9,
+	_TNL_ATTRIB_TEX2 = 10,
+	_TNL_ATTRIB_TEX3 = 11,
+	_TNL_ATTRIB_TEX4 = 12,
+	_TNL_ATTRIB_TEX5 = 13,
+	_TNL_ATTRIB_TEX6 = 14,
+	_TNL_ATTRIB_TEX7 = 15,
+	_TNL_ATTRIB_MAT_FRONT_AMBIENT = 16,
+	_TNL_ATTRIB_MAT_BACK_AMBIENT = 17,
+	_TNL_ATTRIB_MAT_FRONT_DIFFUSE = 18,
+	_TNL_ATTRIB_MAT_BACK_DIFFUSE = 19,
+	_TNL_ATTRIB_MAT_FRONT_SPECULAR = 20,
+	_TNL_ATTRIB_MAT_BACK_SPECULAR = 21,
+	_TNL_ATTRIB_MAT_FRONT_EMISSION = 22,
+	_TNL_ATTRIB_MAT_BACK_EMISSION = 23,
+	_TNL_ATTRIB_MAT_FRONT_SHININESS = 24,
+	_TNL_ATTRIB_MAT_BACK_SHININESS = 25,
+	_TNL_ATTRIB_MAT_FRONT_INDEXES = 26,
+	_TNL_ATTRIB_MAT_BACK_INDEXES = 27, 
+	_TNL_ATTRIB_INDEX = 28,        
+	_TNL_ATTRIB_EDGEFLAG = 29,     
+	_TNL_ATTRIB_POINTSIZE = 30,
+	_TNL_ATTRIB_MAX = 31
+} ;
+
+/* Will probably have to revise this scheme fairly shortly, eg. by
+ * compacting all the MAT flags down to one bit, or by using two
+ * dwords to store the flags.
+ */
+#define _TNL_BIT_POS                 (1<<0)
+#define _TNL_BIT_WEIGHT              (1<<1)
+#define _TNL_BIT_NORMAL              (1<<2)
+#define _TNL_BIT_COLOR0              (1<<3)
+#define _TNL_BIT_COLOR1              (1<<4)
+#define _TNL_BIT_FOG                 (1<<5)
+#define _TNL_BIT_SIX                 (1<<6)
+#define _TNL_BIT_SEVEN               (1<<7)
+#define _TNL_BIT_TEX0                (1<<8)
+#define _TNL_BIT_TEX1                (1<<9)
+#define _TNL_BIT_TEX2                (1<<10)
+#define _TNL_BIT_TEX3                (1<<11)
+#define _TNL_BIT_TEX4                (1<<12)
+#define _TNL_BIT_TEX5                (1<<13)
+#define _TNL_BIT_TEX6                (1<<14)
+#define _TNL_BIT_TEX7                (1<<15)
+#define _TNL_BIT_MAT_FRONT_AMBIENT   (1<<16)
+#define _TNL_BIT_MAT_BACK_AMBIENT    (1<<17)
+#define _TNL_BIT_MAT_FRONT_DIFFUSE   (1<<18)
+#define _TNL_BIT_MAT_BACK_DIFFUSE    (1<<19)
+#define _TNL_BIT_MAT_FRONT_SPECULAR  (1<<20)
+#define _TNL_BIT_MAT_BACK_SPECULAR   (1<<21)
+#define _TNL_BIT_MAT_FRONT_EMISSION  (1<<22)
+#define _TNL_BIT_MAT_BACK_EMISSION   (1<<23)
+#define _TNL_BIT_MAT_FRONT_SHININESS (1<<24)
+#define _TNL_BIT_MAT_BACK_SHININESS  (1<<25)
+#define _TNL_BIT_MAT_FRONT_INDEXES   (1<<26)
+#define _TNL_BIT_MAT_BACK_INDEXES    (1<<27)
+#define _TNL_BIT_INDEX               (1<<28)
+#define _TNL_BIT_EDGEFLAG            (1<<29)
+#define _TNL_BIT_POINTSIZE           (1<<30)
+
+#define _TNL_BIT_TEX(u)  (1 << (_TNL_ATTRIB_TEX0 + (u)))
+
+
+
+#define _TNL_BITS_MAT_ANY  (_TNL_BIT_MAT_FRONT_AMBIENT   | 	\
+			    _TNL_BIT_MAT_BACK_AMBIENT    | 	\
+			    _TNL_BIT_MAT_FRONT_DIFFUSE   | 	\
+			    _TNL_BIT_MAT_BACK_DIFFUSE    | 	\
+			    _TNL_BIT_MAT_FRONT_SPECULAR  | 	\
+			    _TNL_BIT_MAT_BACK_SPECULAR   | 	\
+			    _TNL_BIT_MAT_FRONT_EMISSION  | 	\
+			    _TNL_BIT_MAT_BACK_EMISSION   | 	\
+			    _TNL_BIT_MAT_FRONT_SHININESS | 	\
+			    _TNL_BIT_MAT_BACK_SHININESS  | 	\
+			    _TNL_BIT_MAT_FRONT_INDEXES   | 	\
+			    _TNL_BIT_MAT_BACK_INDEXES)
+
+
+#define _TNL_BITS_TEX_ANY  (_TNL_BIT_TEX0 |	\
+                            _TNL_BIT_TEX1 |	\
+                            _TNL_BIT_TEX2 |	\
+                            _TNL_BIT_TEX3 |	\
+                            _TNL_BIT_TEX4 |	\
+                            _TNL_BIT_TEX5 |	\
+                            _TNL_BIT_TEX6 |	\
+                            _TNL_BIT_TEX7)
+
+
+#define _TNL_BITS_PROG_ANY   (_TNL_BIT_POS    |		\
+			      _TNL_BIT_WEIGHT |		\
+			      _TNL_BIT_NORMAL |		\
+			      _TNL_BIT_COLOR0 |		\
+			      _TNL_BIT_COLOR1 |		\
+			      _TNL_BIT_FOG    |		\
+			      _TNL_BIT_SIX    |		\
+			      _TNL_BIT_SEVEN  |		\
+			      _TNL_BITS_TEX_ANY)
+
+
+
+#define PRIM_BEGIN     0x10
+#define PRIM_END       0x20
+#define PRIM_WEAK      0x40
+#define PRIM_MODE_MASK 0x0f
+
+/* 
+ */
+struct tnl_prim {
+   GLuint mode;
+   GLuint start;
+   GLuint count;
+};
+
+
+
+struct tnl_eval1_map {
+   struct gl_1d_map *map;
+   GLuint sz;
+};
+
+struct tnl_eval2_map {
+   struct gl_2d_map *map;
+   GLuint sz;
+};
+
+struct tnl_eval {
+   GLuint new_state;
+   struct tnl_eval1_map map1[_TNL_ATTRIB_INDEX + 1];
+   struct tnl_eval2_map map2[_TNL_ATTRIB_INDEX + 1];
+};
+
+
+#define TNL_MAX_PRIM 16
+#define TNL_MAX_COPIED_VERTS 3
+
+struct tnl_copied_vtx {
+   GLfloat buffer[_TNL_ATTRIB_MAX * 4 * TNL_MAX_COPIED_VERTS];
+   GLuint nr;
+};
+
+#define VERT_BUFFER_SIZE 2048	/* 8kbytes */
+
+
+typedef void (*tnl_attrfv_func)( const GLfloat * );
+
+struct _tnl_dynfn {
+   struct _tnl_dynfn *next, *prev;
+   GLuint key;
+   char *code;
+};
+
+struct _tnl_dynfn_lists {
+   struct _tnl_dynfn Vertex[4];
+   struct _tnl_dynfn Attribute[4];
+};
+
+struct _tnl_dynfn_generators {
+   struct _tnl_dynfn *(*Vertex[4])( GLcontext *ctx, int key );
+   struct _tnl_dynfn *(*Attribute[4])( GLcontext *ctx, int key );
+};
+
+#define _TNL_MAX_ATTR_CODEGEN 16 
+
+
+/* The assembly of vertices in immediate mode is separated from
+ * display list compilation.  This allows a simpler immediate mode
+ * treatment and a display list compiler better suited to
+ * hardware-acceleration.
+ */
+struct tnl_vtx {
+   GLfloat buffer[VERT_BUFFER_SIZE];
+   GLubyte attrsz[_TNL_ATTRIB_MAX];
+   GLuint vertex_size;
+   struct tnl_prim prim[TNL_MAX_PRIM];
+   GLuint prim_count;
+   GLfloat *vbptr;		      /* cursor, points into buffer */
+   GLfloat vertex[_TNL_ATTRIB_MAX*4]; /* current vertex */
+   GLfloat *attrptr[_TNL_ATTRIB_MAX]; /* points into vertex */
+   GLfloat *current[_TNL_ATTRIB_MAX]; /* points into ctx->Current, etc */
+   GLuint counter, initial_counter;
+   struct tnl_copied_vtx copied;
+
+   tnl_attrfv_func tabfv[_TNL_MAX_ATTR_CODEGEN+1][4]; /* plus 1 for ERROR_ATTRIB */
+
+   struct _tnl_dynfn_lists cache;
+   struct _tnl_dynfn_generators gen;
+
+   struct tnl_eval eval;
+   GLboolean *edgeflag_tmp;
+   GLboolean have_materials;
+};
+
+
+
+
+/* For display lists, this structure holds a run of vertices of the
+ * same format, and a strictly well-formed set of begin/end pairs,
+ * starting on the first vertex and ending at the last.  Vertex
+ * copying on buffer breaks is precomputed according to these
+ * primitives, though there are situations where the copying will need
+ * correction at execute-time, perhaps by replaying the list as
+ * immediate mode commands.
+ *
+ * On executing this list, the 'current' values may be updated with
+ * the values of the final vertex, and often no fixup of the start of
+ * the vertex list is required.
+ *
+ * Eval and other commands that don't fit into these vertex lists are
+ * compiled using the fallback opcode mechanism provided by dlist.c.
+ */
+struct tnl_vertex_list {
+   GLubyte attrsz[_TNL_ATTRIB_MAX];
+   GLuint vertex_size;
+
+   GLfloat *buffer;
+   GLuint count;
+   GLuint wrap_count;		/* number of copied vertices at start */
+   GLboolean have_materials;	/* bit of a hack - quick check for materials */
+   GLboolean dangling_attr_ref;	/* current attr implicitly referenced 
+				   outside the list */
+
+   GLfloat *normal_lengths;
+   struct tnl_prim *prim;
+   GLuint prim_count;
+
+   struct tnl_vertex_store *vertex_store;
+   struct tnl_primitive_store *prim_store;
+};
+
+/* These buffers should be a reasonable size to support upload to
+ * hardware?  Maybe drivers should stitch them back together, or
+ * specify a desired size?
+ */
+#define SAVE_BUFFER_SIZE (16*1024)
+#define SAVE_PRIM_SIZE   128
+
+/* Storage to be shared among several vertex_lists.
+ */
+struct tnl_vertex_store {
+   GLfloat buffer[SAVE_BUFFER_SIZE];
+   GLuint used;
+   GLuint refcount;
+};
+
+struct tnl_primitive_store {
+   struct tnl_prim buffer[SAVE_PRIM_SIZE];
+   GLuint used;
+   GLuint refcount;
+};
+
+
+struct tnl_save {
+   GLubyte attrsz[_TNL_ATTRIB_MAX];
+   GLuint vertex_size;
+
+   GLfloat *buffer;
+   GLuint count;
+   GLuint wrap_count;
+
+   struct tnl_prim *prim;
+   GLuint prim_count, prim_max;
+
+   struct tnl_vertex_store *vertex_store;
+   struct tnl_primitive_store *prim_store;
+
+   GLfloat *vbptr;		   /* cursor, points into buffer */
+   GLfloat vertex[_TNL_ATTRIB_MAX*4];	   /* current values */
+   GLfloat *attrptr[_TNL_ATTRIB_MAX];
+   GLuint counter, initial_counter;
+   GLboolean dangling_attr_ref;
+   GLboolean have_materials;
+
+   GLuint opcode_vertex_list;
+
+   struct tnl_copied_vtx copied;
+
+   GLfloat *current[_TNL_ATTRIB_MAX]; /* points into ctx->ListState */
+   GLubyte *currentsz[_TNL_ATTRIB_MAX];
+
+   void (*tabfv[_TNL_ATTRIB_MAX][4])( const GLfloat * );
+};
+
+
+struct tnl_vertex_arrays
+{
+   /* Conventional vertex attribute arrays */
+   GLvector4f  Obj;
+   GLvector4f  Normal;
+   GLvector4f  Color;
+   GLvector4f  SecondaryColor;
+   GLvector4f  FogCoord;
+   GLvector4f  TexCoord[MAX_TEXTURE_COORD_UNITS];
+   GLvector4f  Index;
+
+   GLubyte     *EdgeFlag;
+   GLuint      *Elt;
+
+   /* These attributes don't alias with the conventional attributes.
+    * The GL_NV_vertex_program extension defines 16 extra sets of vertex
+    * arrays which have precedent over the conventional arrays when enabled.
+    */
+   GLvector4f  Attribs[_TNL_ATTRIB_MAX];
+};
+
+
+/**
+ * Contains the current state of a running pipeline.
+ */
+struct vertex_buffer
+{
+   /* Constant over life of the vertex_buffer.
+    */
+   GLuint      Size;
+
+   /* Constant over the pipeline.
+    */
+   GLuint      Count;		              /* for everything except Elts */
+
+   /* Pointers to current data.
+    */
+   GLuint      *Elts;		                
+   GLvector4f  *ObjPtr;		                /* _TNL_BIT_POS */
+   GLvector4f  *EyePtr;		                /* _TNL_BIT_POS */
+   GLvector4f  *ClipPtr;	                /* _TNL_BIT_POS */
+   GLvector4f  *NdcPtr;                         /* _TNL_BIT_POS */
+   GLubyte     ClipOrMask;	                /* _TNL_BIT_POS */
+   GLubyte     ClipAndMask;	                /* _TNL_BIT_POS */
+   GLubyte     *ClipMask;		        /* _TNL_BIT_POS */
+   GLvector4f  *NormalPtr;	                /* _TNL_BIT_NORMAL */
+   GLfloat     *NormalLengthPtr;	        /* _TNL_BIT_NORMAL */
+   GLboolean   *EdgeFlag;	                /* _TNL_BIT_EDGEFLAG */
+   GLvector4f  *TexCoordPtr[MAX_TEXTURE_COORD_UNITS]; /* VERT_TEX_0..n */
+   GLvector4f  *IndexPtr[2];	                /* _TNL_BIT_INDEX */
+   GLvector4f  *ColorPtr[2];	                /* _TNL_BIT_COLOR0 */
+   GLvector4f  *SecondaryColorPtr[2];           /* _TNL_BIT_COLOR1 */
+   GLvector4f  *PointSizePtr;	                /* _TNL_BIT_POS */
+   GLvector4f  *FogCoordPtr;	                /* _TNL_BIT_FOG */
+
+   struct tnl_prim  *Primitive;	              
+   GLuint      PrimitiveCount;	      
+
+   /* Inputs to the vertex program stage */
+   GLvector4f *AttribPtr[_TNL_ATTRIB_MAX];      /* GL_NV_vertex_program */
+
+   GLuint LastClipped;
+   /* Private data from _tnl_render_stage that has no business being
+    * in this struct.
+    */
+};
+
+
+/** Describes an individual operation on the pipeline.
+ */
+struct tnl_pipeline_stage
+{
+   const char *name;
+   GLuint check_state;		/* All state referenced in check() --
+				 * When is the pipeline_stage struct
+				 * itself invalidated?  Must be
+				 * constant.
+				 */
+
+   /* Usually constant or set by the 'check' callback:
+    */
+   GLuint run_state;		/* All state referenced in run() --
+				 * When is the cached output of the
+				 * stage invalidated?
+				 */
+
+   GLboolean active;		/* True if runnable in current state */
+   GLuint inputs;		/* VERT_* inputs to the stage */
+   GLuint outputs;		/* VERT_* outputs of the stage */
+
+   /* Set in _tnl_run_pipeline():
+    */
+   GLuint changed_inputs;	/* Generated value -- inputs to the
+				 * stage that have changed since last
+				 * call to 'run'.
+				 */
+
+
+   /* Private data for the pipeline stage:
+    */
+   void *privatePtr;
+
+   /* Free private data.  May not be null.
+    */
+   void (*destroy)( struct tnl_pipeline_stage * );
+
+   /* Called from _tnl_validate_pipeline().  Must update all fields in
+    * the pipeline_stage struct for the current state.
+    */
+   void (*check)( GLcontext *ctx, struct tnl_pipeline_stage * );
+
+   /* Called from _tnl_run_pipeline().  The stage.changed_inputs value
+    * encodes all inputs to thee struct which have changed.  If
+    * non-zero, recompute all affected outputs of the stage, otherwise
+    * execute any 'sideeffects' of the stage.
+    *
+    * Return value: GL_TRUE - keep going
+    *               GL_FALSE - finished pipeline
+    */
+   GLboolean (*run)( GLcontext *ctx, struct tnl_pipeline_stage * );
+};
+
+/** Contains the array of all pipeline stages.
+ * The default values are defined at the end of t_pipeline.c */
+struct tnl_pipeline {
+   GLuint build_state_trigger;	  /**< state changes which require build */
+   GLuint build_state_changes;    /**< state changes since last build */
+   GLuint run_state_changes;	  /**< state changes since last run */
+   GLuint run_input_changes;	  /**< VERT_* changes since last run */
+   GLuint inputs;		  /**< VERT_* inputs to pipeline */
+   /** This array has to end with a NULL-pointer. */
+   struct tnl_pipeline_stage stages[MAX_PIPELINE_STAGES+1];
+   GLuint nr_stages;
+};
+
+struct tnl_clipspace;
+struct tnl_clipspace_attr;
+
+typedef void (*tnl_extract_func)( const struct tnl_clipspace_attr *a, 
+				  GLfloat *out, 
+				  const GLubyte *v );
+
+typedef void (*tnl_insert_func)( const struct tnl_clipspace_attr *a, 
+				 GLubyte *v, 
+				 const GLfloat *in );
+
+typedef void (*tnl_emit_func)( GLcontext *ctx, 
+			       GLuint start, 
+			       GLuint end, void *dest );
+
+
+/**
+ * Describes how to convert/move a vertex attribute from a vertex array
+ * to a vertex structure.
+ */
+struct tnl_clipspace_attr
+{
+   GLuint attrib;          /* which vertex attrib (0=position, etc) */
+   GLuint format;
+   GLuint vertoffset;      /* position of the attrib in the vertex struct */
+   GLuint vertattrsize;    /* size of the attribute in bytes */
+   GLubyte *inputptr;
+   GLuint inputstride;
+   tnl_insert_func *insert;
+   tnl_insert_func emit;
+   tnl_extract_func extract;
+   const GLfloat *vp;   /* NDC->Viewport mapping matrix */
+};
+
+
+struct tnl_clipspace_codegen {
+   GLboolean (*emit_header)( struct tnl_clipspace_codegen *,
+			     struct tnl_clipspace *);
+   GLboolean (*emit_footer)( struct tnl_clipspace_codegen * );
+   GLboolean (*emit_attr_header)( struct tnl_clipspace_codegen *,
+				  struct tnl_clipspace_attr *,
+				  GLint j, GLenum out_type, 
+				  GLboolean need_vp );
+   GLboolean (*emit_attr_footer)( struct tnl_clipspace_codegen * );
+   GLboolean (*emit_mov)( struct tnl_clipspace_codegen *, 
+			  GLint, GLint );
+   GLboolean (*emit_const)( struct tnl_clipspace_codegen *, 
+			    GLint, GLfloat );
+   GLboolean (*emit_mad)( struct tnl_clipspace_codegen *,
+			  GLint, GLint, GLint, GLint );
+   GLboolean (*emit_float_to_chan)( struct tnl_clipspace_codegen *, 
+				    GLint, GLint );
+   GLboolean (*emit_const_chan)( struct tnl_clipspace_codegen *, 
+				 GLint, GLchan );
+   GLboolean (*emit_float_to_ubyte)( struct tnl_clipspace_codegen *, 
+				     GLint, GLint );
+   GLboolean (*emit_const_ubyte)( struct tnl_clipspace_codegen *, 
+				  GLint, GLubyte );
+   tnl_emit_func (*emit_store_func)( struct tnl_clipspace_codegen * );
+   
+   struct _tnl_dynfn codegen_list;
+   
+   char *buf;
+   int buf_size;
+   int buf_used;
+   int out_offset;
+};
+
+
+
+typedef void (*tnl_points_func)( GLcontext *ctx, GLuint first, GLuint last );
+typedef void (*tnl_line_func)( GLcontext *ctx, GLuint v1, GLuint v2 );
+typedef void (*tnl_triangle_func)( GLcontext *ctx,
+				   GLuint v1, GLuint v2, GLuint v3 );
+typedef void (*tnl_quad_func)( GLcontext *ctx, GLuint v1, GLuint v2,
+			       GLuint v3, GLuint v4 );
+typedef void (*tnl_render_func)( GLcontext *ctx, GLuint start, GLuint count,
+				 GLuint flags );
+typedef void (*tnl_interp_func)( GLcontext *ctx,
+				 GLfloat t, GLuint dst, GLuint out, GLuint in,
+				 GLboolean force_boundary );
+typedef void (*tnl_copy_pv_func)( GLcontext *ctx, GLuint dst, GLuint src );
+typedef void (*tnl_setup_func)( GLcontext *ctx,
+				GLuint start, GLuint end,
+				GLuint new_inputs);
+
+
+/**
+ * Used to describe conversion of vertex arrays to vertex structures.
+ * I.e. Structure of arrays to arrays of structs.
+ */
+struct tnl_clipspace
+{
+   GLboolean need_extras;
+   
+   GLuint new_inputs;
+
+   GLubyte *vertex_buf;
+   GLuint vertex_size;
+   GLuint max_vertex_size;
+
+   struct tnl_clipspace_attr attr[_TNL_ATTRIB_MAX];
+   GLuint attr_count;
+
+   tnl_emit_func emit;
+   tnl_interp_func interp;
+   tnl_copy_pv_func copy_pv;
+
+   struct tnl_clipspace_codegen codegen;
+};
+
+
+struct tnl_device_driver
+{
+   /***
+    *** TNL Pipeline
+    ***/
+
+   void (*RunPipeline)(GLcontext *ctx);
+   /* Replaces PipelineStart/PipelineFinish -- intended to allow
+    * drivers to wrap _tnl_run_pipeline() with code to validate state
+    * and grab/release hardware locks.  
+    */
+
+   void (*NotifyMaterialChange)(GLcontext *ctx);
+   /* Alert tnl-aware drivers of changes to material.
+    */
+
+   GLboolean (*NotifyBegin)(GLcontext *ctx, GLenum p);
+   /* Allow drivers to hook in optimized begin/end engines.
+    * Return value:  GL_TRUE - driver handled the begin
+    *                GL_FALSE - driver didn't handle the begin
+    */
+
+   /***
+    *** Rendering -- These functions called only from t_vb_render.c
+    ***/
+   struct
+   {
+      void (*Start)(GLcontext *ctx);
+      void (*Finish)(GLcontext *ctx);
+      /* Called before and after all rendering operations, including DrawPixels,
+       * ReadPixels, Bitmap, span functions, and CopyTexImage, etc commands.
+       * These are a suitable place for grabbing/releasing hardware locks.
+       */
+
+      void (*PrimitiveNotify)(GLcontext *ctx, GLenum mode);
+      /* Called between RenderStart() and RenderFinish() to indicate the
+       * type of primitive we're about to draw.  Mode will be one of the
+       * modes accepted by glBegin().
+       */
+
+      tnl_interp_func Interp;
+      /* The interp function is called by the clipping routines when we need
+       * to generate an interpolated vertex.  All pertinant vertex ancilliary
+       * data should be computed by interpolating between the 'in' and 'out'
+       * vertices.
+       */
+
+      tnl_copy_pv_func CopyPV;
+      /* The copy function is used to make a copy of a vertex.  All pertinant
+       * vertex attributes should be copied.
+       */
+
+      void (*ClippedPolygon)( GLcontext *ctx, const GLuint *elts, GLuint n );
+      /* Render a polygon with <n> vertices whose indexes are in the <elts>
+       * array.
+       */
+
+      void (*ClippedLine)( GLcontext *ctx, GLuint v0, GLuint v1 );
+      /* Render a line between the two vertices given by indexes v0 and v1. */
+
+      tnl_points_func           Points; /* must now respect vb->elts */
+      tnl_line_func             Line;
+      tnl_triangle_func         Triangle;
+      tnl_quad_func             Quad;
+      /* These functions are called in order to render points, lines,
+       * triangles and quads.  These are only called via the T&L module.
+       */
+
+      tnl_render_func          *PrimTabVerts;
+      tnl_render_func          *PrimTabElts;
+      /* Render whole unclipped primitives (points, lines, linestrips,
+       * lineloops, etc).  The tables are indexed by the GL enum of the
+       * primitive to be rendered.  RenderTabVerts is used for non-indexed
+       * arrays of vertices.  RenderTabElts is used for indexed arrays of
+       * vertices.
+       */
+
+      void (*ResetLineStipple)( GLcontext *ctx );
+      /* Reset the hardware's line stipple counter.
+       */
+
+      tnl_setup_func BuildVertices;
+      /* This function is called whenever new vertices are required for
+       * rendering.  The vertices in question are those n such that start
+       * <= n < end.  The new_inputs parameter indicates those fields of
+       * the vertex which need to be updated, if only a partial repair of
+       * the vertex is required.
+       *
+       * This function is called only from _tnl_render_stage in tnl/t_render.c.
+       */
+      
+
+      GLboolean (*Multipass)( GLcontext *ctx, GLuint passno );
+      /* Driver may request additional render passes by returning GL_TRUE
+       * when this function is called.  This function will be called
+       * after the first pass, and passes will be made until the function
+       * returns GL_FALSE.  If no function is registered, only one pass
+       * is made.
+       *
+       * This function will be first invoked with passno == 1.
+       */
+   } Render;
+};
+   
+
+/**
+ * Context state for T&L context.
+ */
+typedef struct
+{
+   /* Driver interface.
+    */
+   struct tnl_device_driver Driver;
+
+   /* Execute:
+    */
+   struct tnl_vtx vtx;
+   
+   /* Compile:
+    */
+   struct tnl_save save;
+
+   /* Pipeline
+    */
+   struct tnl_pipeline pipeline;
+   struct vertex_buffer vb;
+
+   /* GLvectors for binding to vb:
+    */
+   struct tnl_vertex_arrays vtx_inputs;
+   struct tnl_vertex_arrays save_inputs;
+   struct tnl_vertex_arrays current;
+   struct tnl_vertex_arrays array_inputs;
+
+   /* Clipspace/ndc/window vertex managment:
+    */
+   struct tnl_clipspace clipspace;
+
+   /* Probably need a better configuration mechanism:
+    */
+   GLboolean NeedNdcCoords;
+   GLboolean LoopbackDListCassettes;
+   GLboolean CalcDListNormalLengths;
+   GLboolean IsolateMaterials;
+   GLboolean AllowVertexFog;
+   GLboolean AllowPixelFog;
+   GLboolean AllowCodegen;
+
+   GLboolean _DoVertexFog;  /* eval fog function at each vertex? */
+
+   GLuint render_inputs;
+
+   GLvertexformat exec_vtxfmt;
+   GLvertexformat save_vtxfmt;
+
+} TNLcontext;
+
+
+
+#define TNL_CONTEXT(ctx) ((TNLcontext *)((ctx)->swtnl_context))
+
+
+#define TYPE_IDX(t) ((t) & 0xf)
+#define MAX_TYPES TYPE_IDX(GL_DOUBLE)+1      /* 0xa + 1 */
+
+extern void _tnl_MakeCurrent( GLcontext *ctx,
+			      GLframebuffer *drawBuffer,
+			      GLframebuffer *readBuffer );
+
+
+
+
+#endif