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  1. /*
  2.  * mesa 3-D graphics library
  3.  * Version:  6.5
  4.  *
  5.  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
  6.  *
  7.  * Permission is hereby granted, free of charge, to any person obtaining a
  8.  * copy of this software and associated documentation files (the "Software"),
  9.  * to deal in the Software without restriction, including without limitation
  10.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11.  * and/or sell copies of the Software, and to permit persons to whom the
  12.  * Software is furnished to do so, subject to the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice shall be included
  15.  * in all copies or substantial portions of the Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20.  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21.  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22.  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23.  */
  24.  
  25. /**
  26.  * \file vbo_context.h
  27.  * \brief VBO builder module datatypes and definitions.
  28.  * \author Keith Whitwell
  29.  */
  30.  
  31.  
  32. /**
  33.  * \mainpage The VBO builder module
  34.  *
  35.  * This module hooks into the GL dispatch table and catches all vertex
  36.  * building and drawing commands, such as glVertex3f, glBegin and
  37.  * glDrawArrays.  The module stores all incoming vertex data as arrays
  38.  * in GL vertex buffer objects (VBOs), and translates all drawing
  39.  * commands into calls to a driver supplied DrawPrimitives() callback.
  40.  *
  41.  * The module captures both immediate mode and display list drawing,
  42.  * and manages the allocation, reference counting and deallocation of
  43.  * vertex buffer objects itself.
  44.  *
  45.  * The DrawPrimitives() callback can be either implemented by the
  46.  * driver itself or hooked to the tnl module's _tnl_draw_primitives()
  47.  * function for hardware without tnl capablilties or during fallbacks.
  48.  */
  49.  
  50.  
  51. #ifndef _VBO_CONTEXT_H
  52. #define _VBO_CONTEXT_H
  53.  
  54. #include "vbo.h"
  55. #include "vbo_attrib.h"
  56. #include "vbo_exec.h"
  57. #include "vbo_save.h"
  58.  
  59.  
  60. struct vbo_context {
  61.    struct gl_client_array currval[VBO_ATTRIB_MAX];
  62.    
  63.    /* These point into the above.  TODO: remove.
  64.     */
  65.    struct gl_client_array *legacy_currval;
  66.    struct gl_client_array *generic_currval;
  67.    struct gl_client_array *mat_currval;
  68.  
  69.    GLuint map_vp_none[VERT_ATTRIB_MAX];
  70.    GLuint map_vp_arb[VERT_ATTRIB_MAX];
  71.  
  72.    GLfloat *current[VBO_ATTRIB_MAX]; /* points into ctx->Current, ctx->Light.Material */
  73.    GLfloat CurrentFloatEdgeFlag;
  74.  
  75.  
  76.    struct vbo_exec_context exec;
  77. #if FEATURE_dlist
  78.    struct vbo_save_context save;
  79. #endif
  80.  
  81.    /* Callback into the driver.  This must always succeed, the driver
  82.     * is responsible for initiating any fallback actions required:
  83.     */
  84.    vbo_draw_func draw_prims;
  85. };
  86.  
  87.  
  88. static INLINE struct vbo_context *vbo_context(struct gl_context *ctx)
  89. {
  90.    return (struct vbo_context *)(ctx->swtnl_im);
  91. }
  92.  
  93.  
  94. /**
  95.  * Return VP_x token to indicate whether we're running fixed-function
  96.  * vertex transformation, an NV vertex program or ARB vertex program/shader.
  97.  */
  98. static INLINE enum vp_mode
  99. get_program_mode( struct gl_context *ctx )
  100. {
  101.    if (!ctx->VertexProgram._Current)
  102.       return VP_NONE;
  103.    else if (ctx->VertexProgram._Current == ctx->VertexProgram._TnlProgram)
  104.       return VP_NONE;
  105.    else if (ctx->VertexProgram._Current->IsNVProgram)
  106.       return VP_NV;
  107.    else
  108.       return VP_ARB;
  109. }
  110.  
  111.  
  112. #endif
  113.