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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Keith Whitwell <keith@tungstengraphics.com>
  27  */
  28
  29 #include "main/imports.h"
  30 #include "main/mtypes.h"
  31 #include "main/api_arrayelt.h"
  32 #include "main/bufferobj.h"
  33 #include "math/m_eval.h"
  34 #include "vbo.h"
  35 #include "vbo_context.h"
  36
  37 #define NR_MAT_ATTRIBS 12
  38
  39 static GLuint check_size( const GLfloat *attr )
  40 {
  41    if (attr[3] != 1.0) return 4;
  42    if (attr[2] != 0.0) return 3;
  43    if (attr[1] != 0.0) return 2;
  44    return 1;
  45 }
  46
  47
  48 static void init_legacy_currval(struct gl_context *ctx)
  49 {
  50    struct vbo_context *vbo = vbo_context(ctx);
  51    struct gl_client_array *arrays = &vbo->currval[VBO_ATTRIB_POS];
  52    GLuint i;
  53
  54    memset(arrays, 0, sizeof(*arrays) * VERT_ATTRIB_FF_MAX);
  55
  56    /* Set up a constant (StrideB == 0) array for each current
  57     * attribute:
  58     */
  59    for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
  60       struct gl_client_array *cl = &arrays[i];
  61
  62       /* Size will have to be determined at runtime:
  63        */
  64       cl->Size = check_size(ctx->Current.Attrib[i]);
  65       cl->Stride = 0;
  66       cl->StrideB = 0;
  67       cl->Enabled = 1;
  68       cl->Type = GL_FLOAT;
  69       cl->Format = GL_RGBA;
  70       cl->Ptr = (const void *)ctx->Current.Attrib[i];
  71       cl->_ElementSize = cl->Size * sizeof(GLfloat);
  72       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
  73                                     ctx->Shared->NullBufferObj);
  74    }
  75 }
  76
  77
  78 static void init_generic_currval(struct gl_context *ctx)
  79 {
  80    struct vbo_context *vbo = vbo_context(ctx);
  81    struct gl_client_array *arrays = &vbo->currval[VBO_ATTRIB_GENERIC0];
  82    GLuint i;
  83
  84    memset(arrays, 0, sizeof(*arrays) * VERT_ATTRIB_GENERIC_MAX);
  85
  86    for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
  87       struct gl_client_array *cl = &arrays[i];
  88
  89       /* This will have to be determined at runtime:
  90        */
  91       cl->Size = 1;
  92       cl->Type = GL_FLOAT;
  93       cl->Format = GL_RGBA;
  94       cl->Ptr = (const void *)ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i];
  95       cl->Stride = 0;
  96       cl->StrideB = 0;
  97       cl->Enabled = 1;
  98       cl->_ElementSize = cl->Size * sizeof(GLfloat);
  99       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 100                                     ctx->Shared->NullBufferObj);
 101    }
 102 }
 103
 104
 105 static void init_mat_currval(struct gl_context *ctx)
 106 {
 107    struct vbo_context *vbo = vbo_context(ctx);
 108    struct gl_client_array *arrays =
 109       &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT];
 110    GLuint i;
 111
 112    ASSERT(NR_MAT_ATTRIBS == MAT_ATTRIB_MAX);
 113
 114    memset(arrays, 0, sizeof(*arrays) * NR_MAT_ATTRIBS);
 115
 116    /* Set up a constant (StrideB == 0) array for each current
 117     * attribute:
 118     */
 119    for (i = 0; i < NR_MAT_ATTRIBS; i++) {
 120       struct gl_client_array *cl = &arrays[i];
 121
 122       /* Size is fixed for the material attributes, for others will
 123        * be determined at runtime:
 124        */
 125       switch (i - VERT_ATTRIB_GENERIC0) {
 126       case MAT_ATTRIB_FRONT_SHININESS:
 127       case MAT_ATTRIB_BACK_SHININESS:
 128          cl->Size = 1;
 129          break;
 130       case MAT_ATTRIB_FRONT_INDEXES:
 131       case MAT_ATTRIB_BACK_INDEXES:
 132          cl->Size = 3;
 133          break;
 134       default:
 135          cl->Size = 4;
 136          break;
 137       }
 138
 139       cl->Ptr = (const void *)ctx->Light.Material.Attrib[i];
 140       cl->Type = GL_FLOAT;
 141       cl->Format = GL_RGBA;
 142       cl->Stride = 0;
 143       cl->StrideB = 0;
 144       cl->Enabled = 1;
 145       cl->_ElementSize = cl->Size * sizeof(GLfloat);
 146       _mesa_reference_buffer_object(ctx, &cl->BufferObj,
 147                                     ctx->Shared->NullBufferObj);
 148    }
 149 }
 150
 151
 152 GLboolean _vbo_CreateContext( struct gl_context *ctx )
 153 {
 154    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 155
 156    ctx->swtnl_im = (void *)vbo;
 157
 158    /* Initialize the arrayelt helper
 159     */
 160    if (!ctx->aelt_context &&
 161        !_ae_create_context( ctx )) {
 162       return GL_FALSE;
 163    }
 164
 165    init_legacy_currval( ctx );
 166    init_generic_currval( ctx );
 167    init_mat_currval( ctx );
 168
 169    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 170     * of vertex program active.
 171     */
 172    {
 173       GLuint i;
 174
 175       /* identity mapping */
 176       for (i = 0; i < Elements(vbo->map_vp_none); i++)
 177          vbo->map_vp_none[i] = i;
 178       /* map material attribs to generic slots */
 179       for (i = 0; i < NR_MAT_ATTRIBS; i++)
 180          vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
 181             = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 182
 183       for (i = 0; i < Elements(vbo->map_vp_arb); i++)
 184          vbo->map_vp_arb[i] = i;
 185    }
 186
 187
 188    /* Hook our functions into exec and compile dispatch tables.  These
 189     * will pretty much be permanently installed, which means that the
 190     * vtxfmt mechanism can be removed now.
 191     */
 192    vbo_exec_init( ctx );
 193    if (ctx->API == API_OPENGL_COMPAT)
 194       vbo_save_init( ctx );
 195
 196    _math_init_eval();
 197
 198    return GL_TRUE;
 199 }
 200
 201
 202 void _vbo_InvalidateState( struct gl_context *ctx, GLuint new_state )
 203 {
 204    vbo_exec_invalidate_state(ctx, new_state);
 205 }
 206
 207
 208 void _vbo_DestroyContext( struct gl_context *ctx )
 209 {
 210    struct vbo_context *vbo = vbo_context(ctx);
 211
 212    if (ctx->aelt_context) {
 213       _ae_destroy_context( ctx );
 214       ctx->aelt_context = NULL;
 215    }
 216
 217    if (vbo) {
 218       GLuint i;
 219
 220       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 221          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 222       }
 223
 224       vbo_exec_destroy(ctx);
 225       if (ctx->API == API_OPENGL_COMPAT)
 226          vbo_save_destroy(ctx);
 227       free(vbo);
 228       ctx->swtnl_im = NULL;
 229    }
 230 }
 231
 232
 233 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 234 {
 235    struct vbo_context *vbo = vbo_context(ctx);
 236    vbo->draw_prims = func;
 237 }
 238