vbo_exec.h

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/**************************************************************************

Copyright 2002 Tungsten Graphics Inc., Cedar Park, Texas.

All Rights Reserved.

Permission is hereby granted, free of charge, to any person obtaining a
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/*
 * Authors:
 *   Keith Whitwell <keith@tungstengraphics.com>
 *
 */

#ifndef __VBO_EXEC_H__
#define __VBO_EXEC_H__

#include "main/mtypes.h"
#include "vbo.h"
#include "vbo_attrib.h"


#define VBO_MAX_PRIM 64

/* Wierd implementation stuff:
 */
#define VBO_VERT_BUFFER_SIZE (1024*16)  /* dwords == 64k */
#define VBO_MAX_ATTR_CODEGEN 16 
#define ERROR_ATTRIB 16




struct vbo_exec_eval1_map {
   struct gl_1d_map *map;
   GLuint sz;
};

struct vbo_exec_eval2_map {
   struct gl_2d_map *map;
   GLuint sz;
};



struct vbo_exec_copied_vtx {
   GLfloat buffer[VBO_ATTRIB_MAX * 4 * VBO_MAX_COPIED_VERTS];
   GLuint nr;
};


typedef void (*vbo_attrfv_func)( const GLfloat * );


struct vbo_exec_context
{
   GLcontext *ctx;   
   GLvertexformat vtxfmt;

   struct {
      struct gl_buffer_object *bufferobj;
      GLubyte *buffer_map;

      GLuint vertex_size;

      struct _mesa_prim prim[VBO_MAX_PRIM];
      GLuint prim_count;

      GLfloat *vbptr;            /* cursor, points into buffer */
      GLfloat vertex[VBO_ATTRIB_MAX*4]; /* current vertex */

      GLuint vert_count;
      GLuint max_vert;
      struct vbo_exec_copied_vtx copied;

      GLubyte attrsz[VBO_ATTRIB_MAX];
      GLubyte active_sz[VBO_ATTRIB_MAX];

      GLfloat *attrptr[VBO_ATTRIB_MAX]; 
      struct gl_client_array arrays[VBO_ATTRIB_MAX];

      /* According to program mode, the values above plus current
       * values are squashed down to the 32 attributes passed to the
       * vertex program below:
       */
      GLuint program_mode;
      GLuint enabled_flags;
      const struct gl_client_array *inputs[VERT_ATTRIB_MAX];
   } vtx;

   
   struct {
      GLboolean recalculate_maps;
      struct vbo_exec_eval1_map map1[VERT_ATTRIB_MAX];
      struct vbo_exec_eval2_map map2[VERT_ATTRIB_MAX];
   } eval;

   struct {
      GLuint program_mode;
      GLuint enabled_flags;
      GLuint array_obj;

      /* These just mirror the current arrayobj (todo: make arrayobj
       * look like this and remove the mirror):
       */
      const struct gl_client_array *legacy_array[16];
      const struct gl_client_array *generic_array[16];

      /* Arrays and current values manipulated according to program
       * mode, etc.  These are the attributes as seen by vertex
       * programs:
       */
      const struct gl_client_array *inputs[VERT_ATTRIB_MAX];
   } array;
};



/* External API:
 */
void vbo_exec_init( GLcontext *ctx );
void vbo_exec_destroy( GLcontext *ctx );
void vbo_exec_invalidate_state( GLcontext *ctx, GLuint new_state );
void vbo_exec_FlushVertices( GLcontext *ctx, GLuint flags );


/* Internal functions:
 */
void vbo_exec_array_init( struct vbo_exec_context *exec );
void vbo_exec_array_destroy( struct vbo_exec_context *exec );


void vbo_exec_vtx_init( struct vbo_exec_context *exec );
void vbo_exec_vtx_destroy( struct vbo_exec_context *exec );
void vbo_exec_vtx_flush( struct vbo_exec_context *exec );
void vbo_exec_vtx_wrap( struct vbo_exec_context *exec );

void vbo_exec_eval_update( struct vbo_exec_context *exec );

void vbo_exec_do_EvalCoord2f( struct vbo_exec_context *exec, 
                     GLfloat u, GLfloat v );

void vbo_exec_do_EvalCoord1f( struct vbo_exec_context *exec,
                     GLfloat u);

extern GLboolean 
vbo_validate_shaders(GLcontext *ctx);

#endif