src/mesa/vbo/vbo_context.h

   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 #if FEATURE_dlist
  58 #include "vbo_save.h"
  59 #endif
  60
  61
  62 struct vbo_context {
  63    struct gl_client_array currval[VBO_ATTRIB_MAX];
  64
  65    /* These point into the above.  TODO: remove.
  66     */
  67    struct gl_client_array *legacy_currval;
  68    struct gl_client_array *generic_currval;
  69    struct gl_client_array *mat_currval;
  70
  71    GLuint map_vp_none[VERT_ATTRIB_MAX];
  72    GLuint map_vp_arb[VERT_ATTRIB_MAX];
  73
  74    GLfloat *current[VBO_ATTRIB_MAX]; /* points into ctx->Current, ctx->Light.Material */
  75    GLfloat CurrentFloatEdgeFlag;
  76
  77
  78    struct vbo_exec_context exec;
  79 #if FEATURE_dlist
  80    struct vbo_save_context save;
  81 #endif
  82
  83    /* Callback into the driver.  This must always succeed, the driver
  84     * is responsible for initiating any fallback actions required:
  85     */
  86    vbo_draw_func draw_prims;
  87 };
  88
  89
  90 static INLINE struct vbo_context *vbo_context(GLcontext *ctx)
  91 {
  92    return (struct vbo_context *)(ctx->swtnl_im);
  93 }
  94
  95
  96 /**
  97  * Return VP_x token to indicate whether we're running fixed-function
  98  * vertex transformation, an NV vertex program or ARB vertex program/shader.
  99  */
 100 static INLINE enum vp_mode
 101 get_program_mode( GLcontext *ctx )
 102 {
 103    if (!ctx->VertexProgram._Current)
 104       return VP_NONE;
 105    else if (ctx->VertexProgram._Current == ctx->VertexProgram._TnlProgram)
 106       return VP_NONE;
 107    else if (ctx->VertexProgram._Current->IsNVProgram)
 108       return VP_NV;
 109    else
 110       return VP_ARB;
 111 }
 112
 113
 114 #endif