src/mesa/vbo/vbo_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keithw@vmware.com>
  26  */
  27
  28 #include "main/imports.h"
  29 #include "main/mtypes.h"
  30 #include "main/api_arrayelt.h"
  31 #include "main/bufferobj.h"
  32 #include "math/m_eval.h"
  33 #include "vbo.h"
  34 #include "vbo_context.h"
  35
  36
  37 static GLuint check_size( const GLfloat *attr )
  38 {
  39    if (attr[3] != 1.0F) return 4;
  40    if (attr[2] != 0.0F) return 3;
  41    if (attr[1] != 0.0F) return 2;
  42    return 1;
  43 }
  44
  45
  46 /**
  47  * Helper for initializing a vertex array.
  48  */
  49 static void
  50 init_array(struct gl_context *ctx, struct gl_client_array *cl,
  51            unsigned size, const void *pointer)
  52 {
  53    memset(cl, 0, sizeof(*cl));
  54
  55    cl->Size = size;
  56    cl->Type = GL_FLOAT;
  57    cl->Format = GL_RGBA;
  58    cl->Stride = 0;
  59    cl->StrideB = 0;
  60    cl->_ElementSize = cl->Size * sizeof(GLfloat);
  61    cl->Ptr = pointer;
  62    cl->Enabled = 1;
  63
  64    _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  65                                  ctx->Shared->NullBufferObj);
  66 }
  67
  68
  69 /**
  70  * Set up the vbo->currval arrays to point at the context's current
  71  * vertex attributes (with strides = 0).
  72  */
  73 static void init_legacy_currval(struct gl_context *ctx)
  74 {
  75    struct vbo_context *vbo = vbo_context(ctx);
  76    GLuint i;
  77
  78    /* Set up a constant (StrideB == 0) array for each current
  79     * attribute:
  80     */
  81    for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
  82       struct gl_client_array *cl = &vbo->currval[VERT_ATTRIB_FF(i)];
  83
  84       init_array(ctx, cl,
  85                  check_size(ctx->Current.Attrib[i]),
  86                  ctx->Current.Attrib[i]);
  87    }
  88 }
  89
  90
  91 static void init_generic_currval(struct gl_context *ctx)
  92 {
  93    struct vbo_context *vbo = vbo_context(ctx);
  94    GLuint i;
  95
  96    for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
  97       struct gl_client_array *cl = &vbo->currval[VBO_ATTRIB_GENERIC0 + i];
  98
  99       init_array(ctx, cl, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]);
 100    }
 101 }
 102
 103
 104 static void init_mat_currval(struct gl_context *ctx)
 105 {
 106    struct vbo_context *vbo = vbo_context(ctx);
 107    GLuint i;
 108
 109    /* Set up a constant (StrideB == 0) array for each current
 110     * attribute:
 111     */
 112    for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 113       struct gl_client_array *cl =
 114          &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i];
 115       unsigned size;
 116
 117       /* Size is fixed for the material attributes, for others will
 118        * be determined at runtime:
 119        */
 120       switch (i) {
 121       case MAT_ATTRIB_FRONT_SHININESS:
 122       case MAT_ATTRIB_BACK_SHININESS:
 123          size = 1;
 124          break;
 125       case MAT_ATTRIB_FRONT_INDEXES:
 126       case MAT_ATTRIB_BACK_INDEXES:
 127          size = 3;
 128          break;
 129       default:
 130          size = 4;
 131          break;
 132       }
 133
 134       init_array(ctx, cl, size, ctx->Light.Material.Attrib[i]);
 135    }
 136 }
 137
 138
 139 GLboolean _vbo_CreateContext( struct gl_context *ctx )
 140 {
 141    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 142
 143    ctx->vbo_context = vbo;
 144
 145    /* Initialize the arrayelt helper
 146     */
 147    if (!ctx->aelt_context &&
 148        !_ae_create_context( ctx )) {
 149       return GL_FALSE;
 150    }
 151
 152    init_legacy_currval( ctx );
 153    init_generic_currval( ctx );
 154    init_mat_currval( ctx );
 155
 156    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 157     * of vertex program active.
 158     */
 159    {
 160       GLuint i;
 161
 162       /* identity mapping */
 163       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++)
 164          vbo->map_vp_none[i] = i;
 165       /* map material attribs to generic slots */
 166       for (i = 0; i < MAT_ATTRIB_MAX; i++)
 167          vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
 168             = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 169
 170       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++)
 171          vbo->map_vp_arb[i] = i;
 172    }
 173
 174
 175    /* Hook our functions into exec and compile dispatch tables.  These
 176     * will pretty much be permanently installed, which means that the
 177     * vtxfmt mechanism can be removed now.
 178     */
 179    vbo_exec_init( ctx );
 180    if (ctx->API == API_OPENGL_COMPAT)
 181       vbo_save_init( ctx );
 182
 183    _math_init_eval();
 184
 185    return GL_TRUE;
 186 }
 187
 188
 189 void _vbo_InvalidateState( struct gl_context *ctx, GLuint new_state )
 190 {
 191    vbo_exec_invalidate_state(ctx, new_state);
 192 }
 193
 194
 195 void _vbo_DestroyContext( struct gl_context *ctx )
 196 {
 197    struct vbo_context *vbo = vbo_context(ctx);
 198
 199    if (ctx->aelt_context) {
 200       _ae_destroy_context( ctx );
 201       ctx->aelt_context = NULL;
 202    }
 203
 204    if (vbo) {
 205       GLuint i;
 206
 207       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 208          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 209       }
 210
 211       vbo_exec_destroy(ctx);
 212       if (ctx->API == API_OPENGL_COMPAT)
 213          vbo_save_destroy(ctx);
 214       free(vbo);
 215       ctx->vbo_context = NULL;
 216    }
 217 }
 218
 219
 220 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 221 {
 222    struct vbo_context *vbo = vbo_context(ctx);
 223    vbo->draw_prims = func;
 224 }
 225