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