src/mesa/vbo/vbo_context.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.3
   4  *
   5  * Copyright (C) 1999-2005  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  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27
  28 #include "main/imports.h"
  29 #include "main/mtypes.h"
  30 #include "main/api_arrayelt.h"
  31 #include "math/m_eval.h"
  32 #include "vbo.h"
  33 #include "vbo_context.h"
  34
  35 #if 0
  36 /* Reach out and grab this to use as the default:
  37  */
  38 extern void _tnl_draw_prims( GLcontext *ctx,
  39                              const struct gl_client_array *arrays[],
  40                              const struct _mesa_prim *prims,
  41                              GLuint nr_prims,
  42                              const struct _mesa_index_buffer *ib,
  43                              GLuint min_index,
  44                              GLuint max_index );
  45 #endif
  46
  47
  48
  49 #define NR_LEGACY_ATTRIBS 16
  50 #define NR_GENERIC_ATTRIBS 16
  51 #define NR_MAT_ATTRIBS 12
  52
  53 static GLuint check_size( const GLfloat *attr )
  54 {
  55    if (attr[3] != 1.0) return 4;
  56    if (attr[2] != 0.0) return 3;
  57    if (attr[1] != 0.0) return 2;
  58    return 1;
  59 }
  60
  61 static void init_legacy_currval(GLcontext *ctx)
  62 {
  63    struct vbo_context *vbo = vbo_context(ctx);
  64    struct gl_client_array *arrays = vbo->legacy_currval;
  65    GLuint i;
  66
  67    memset(arrays, 0, sizeof(*arrays) * NR_LEGACY_ATTRIBS);
  68
  69    /* Set up a constant (StrideB == 0) array for each current
  70     * attribute:
  71     */
  72    for (i = 0; i < NR_LEGACY_ATTRIBS; i++) {
  73       struct gl_client_array *cl = &arrays[i];
  74
  75       /* Size will have to be determined at runtime:
  76        */
  77       cl->Size = check_size(ctx->Current.Attrib[i]);
  78       cl->Stride = 0;
  79       cl->StrideB = 0;
  80       cl->Enabled = 1;
  81       cl->Type = GL_FLOAT;
  82       cl->Format = GL_RGBA;
  83       cl->Ptr = (const void *)ctx->Current.Attrib[i];
  84       cl->BufferObj = ctx->Array.NullBufferObj;
  85    }
  86 }
  87
  88
  89 static void init_generic_currval(GLcontext *ctx)
  90 {
  91    struct vbo_context *vbo = vbo_context(ctx);
  92    struct gl_client_array *arrays = vbo->generic_currval;
  93    GLuint i;
  94
  95    memset(arrays, 0, sizeof(*arrays) * NR_GENERIC_ATTRIBS);
  96
  97    for (i = 0; i < NR_GENERIC_ATTRIBS; i++) {
  98       struct gl_client_array *cl = &arrays[i];
  99
 100       /* This will have to be determined at runtime:
 101        */
 102       cl->Size = 1;
 103       cl->Type = GL_FLOAT;
 104       cl->Format = GL_RGBA;
 105       cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
 106       cl->Stride = 0;
 107       cl->StrideB = 0;
 108       cl->Enabled = 1;
 109       cl->BufferObj = ctx->Array.NullBufferObj;
 110    }
 111 }
 112
 113
 114 static void init_mat_currval(GLcontext *ctx)
 115 {
 116    struct vbo_context *vbo = vbo_context(ctx);
 117    struct gl_client_array *arrays = vbo->mat_currval;
 118    GLuint i;
 119
 120    ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
 121
 122    memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
 123
 124    /* Set up a constant (StrideB == 0) array for each current
 125     * attribute:
 126     */
 127    for (i = 0; i < NR_MAT_ATTRIBS; i++) {
 128       struct gl_client_array *cl = &arrays[i];
 129
 130       /* Size is fixed for the material attributes, for others will
 131        * be determined at runtime:
 132        */
 133       switch (i - VERT_ATTRIB_GENERIC0) {
 134       case MAT_ATTRIB_FRONT_SHININESS:
 135       case MAT_ATTRIB_BACK_SHININESS:
 136          cl->Size = 1;
 137          break;
 138       case MAT_ATTRIB_FRONT_INDEXES:
 139       case MAT_ATTRIB_BACK_INDEXES:
 140          cl->Size = 3;
 141          break;
 142       default:
 143          cl->Size = 4;
 144          break;
 145       }
 146
 147       cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 148       cl->Type = GL_FLOAT;
 149       cl->Format = GL_RGBA;
 150       cl->Stride = 0;
 151       cl->StrideB = 0;
 152       cl->Enabled = 1;
 153       cl->BufferObj = ctx->Array.NullBufferObj;
 154    }
 155 }
 156
 157 #if 0
 158
 159 static void vbo_exec_current_init( struct vbo_exec_context *exec )
 160 {
 161    GLcontext *ctx = exec->ctx;
 162    GLint i;
 163
 164    /* setup the pointers for the typical 16 vertex attributes */
 165    for (i = 0; i < VBO_ATTRIB_FIRST_MATERIAL; i++)
 166       exec->vtx.current[i] = ctx->Current.Attrib[i];
 167
 168    /* setup pointers for the 12 material attributes */
 169    for (i = 0; i < MAT_ATTRIB_MAX; i++)
 170       exec->vtx.current[VBO_ATTRIB_FIRST_MATERIAL + i] =
 171          ctx->Light.Material.Attrib[i];
 172 }
 173 #endif
 174
 175 GLboolean _vbo_CreateContext( GLcontext *ctx )
 176 {
 177    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 178
 179    ctx->swtnl_im = (void *)vbo;
 180
 181    /* Initialize the arrayelt helper
 182     */
 183    if (!ctx->aelt_context &&
 184        !_ae_create_context( ctx )) {
 185       return GL_FALSE;
 186    }
 187
 188    /* TODO: remove these pointers.
 189     */
 190    vbo->legacy_currval = &vbo->currval[VBO_ATTRIB_POS];
 191    vbo->generic_currval = &vbo->currval[VBO_ATTRIB_GENERIC0];
 192    vbo->mat_currval = &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 193
 194    init_legacy_currval( ctx );
 195    init_generic_currval( ctx );
 196    init_mat_currval( ctx );
 197
 198    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 199     * of vertex program active.
 200     */
 201    {
 202       GLuint i;
 203
 204       /* When no vertex program, pull in the material attributes in
 205        * the 16..32 generic range.
 206        */
 207       for (i = 0; i < 16; i++)
 208          vbo->map_vp_none[i] = i;
 209       for (i = 0; i < 12; i++)
 210          vbo->map_vp_none[16+i] = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 211       for (i = 0; i < 4; i++)
 212          vbo->map_vp_none[28+i] = i;
 213
 214       for (i = 0; i < VERT_ATTRIB_MAX; i++)
 215          vbo->map_vp_arb[i] = i;
 216    }
 217
 218
 219    /* By default:
 220     */
 221 #if 0 /* dead - see vbo_set_draw_func() */
 222    vbo->draw_prims = _tnl_draw_prims;
 223 #endif
 224
 225    /* Hook our functions into exec and compile dispatch tables.  These
 226     * will pretty much be permanently installed, which means that the
 227     * vtxfmt mechanism can be removed now.
 228     */
 229    vbo_exec_init( ctx );
 230 #if FEATURE_dlist
 231    vbo_save_init( ctx );
 232 #endif
 233
 234    _math_init_eval();
 235
 236    return GL_TRUE;
 237 }
 238
 239 void _vbo_InvalidateState( GLcontext *ctx, GLuint new_state )
 240 {
 241    _ae_invalidate_state(ctx, new_state);
 242    vbo_exec_invalidate_state(ctx, new_state);
 243 }
 244
 245
 246 void _vbo_DestroyContext( GLcontext *ctx )
 247 {
 248    if (ctx->aelt_context) {
 249       _ae_destroy_context( ctx );
 250       ctx->aelt_context = NULL;
 251    }
 252
 253    if (vbo_context(ctx)) {
 254       vbo_exec_destroy(ctx);
 255 #if FEATURE_dlist
 256       vbo_save_destroy(ctx);
 257 #endif
 258       FREE(vbo_context(ctx));
 259       ctx->swtnl_im = NULL;
 260    }
 261 }
 262
 263
 264 void vbo_set_draw_func(GLcontext *ctx, vbo_draw_func func)
 265 {
 266    struct vbo_context *vbo = vbo_context(ctx);
 267    vbo->draw_prims = func;
 268 }
 269