src/mesa/vbo/vbo_exec.h

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

Copyright 2002 VMware, Inc.

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"),
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The above copyright notice and this permission notice (including the next
paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
VMWARE AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
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USE OR OTHER DEALINGS IN THE SOFTWARE.

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

/*
 * Authors:
 *   Keith Whitwell <keithw@vmware.com>
 *
 */

#ifndef VBO_EXEC_H
#define VBO_EXEC_H

#include "main/dd.h"
#include "main/imports.h"
#include "vbo.h"
#include "vbo_attrib.h"


/**
 * Max number of primitives (number of glBegin/End pairs) per VBO.
 */
#define VBO_MAX_PRIM 64


/**
 * Size (in bytes) of the VBO to use for glBegin/glVertex/glEnd-style rendering.
 */
#define VBO_VERT_BUFFER_SIZE (1024 * 512)


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 {
   fi_type buffer[VBO_ATTRIB_MAX * 4 * VBO_MAX_COPIED_VERTS];
   GLuint nr;
};


struct vbo_exec_context
{
   struct gl_context *ctx;
   GLvertexformat vtxfmt;
   GLvertexformat vtxfmt_noop;

   struct {
      struct gl_buffer_object *bufferobj;

      GLuint vertex_size;       /* in dwords */
      GLuint vertex_size_no_pos;

      struct _mesa_prim prim[VBO_MAX_PRIM];
      GLuint prim_count;

      fi_type *buffer_map;
      fi_type *buffer_ptr;              /* cursor, points into buffer */
      GLuint   buffer_used;             /* in bytes */
      unsigned buffer_offset;           /* only for persistent mappings */
      fi_type vertex[VBO_ATTRIB_MAX*4]; /* current vertex */

      GLuint vert_count;   /**< Number of vertices currently in buffer */
      GLuint max_vert;     /**< Max number of vertices allowed in buffer */
      struct vbo_exec_copied_vtx copied;

      GLbitfield64 enabled;             /**< mask of enabled vbo arrays. */

      /* Keep these packed in a structure for faster access. */
      struct {
         GLenum16 type;       /**< GL_FLOAT, GL_DOUBLE, GL_INT, etc */
         GLubyte active_size; /**< number of components, but can shrink */
         GLubyte size;        /**< number of components (1..4) */
      } attr[VBO_ATTRIB_MAX];

      /** pointers into the current 'vertex' array, declared above */
      fi_type *attrptr[VBO_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;

#ifndef NDEBUG
   GLint flush_call_depth;
#endif
};



void
vbo_exec_init(struct gl_context *ctx);

void
vbo_exec_destroy(struct gl_context *ctx);

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_map(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);

#endif