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/mtypes.h"
  29 #include "main/bufferobj.h"
  30 #include "math/m_eval.h"
  31 #include "vbo.h"
  32 #include "vbo_context.h"
  33
  34
  35 static GLuint
  36 check_size(const GLfloat *attr)
  37 {
  38    if (attr[3] != 1.0F)
  39       return 4;
  40    if (attr[2] != 0.0F)
  41       return 3;
  42    if (attr[1] != 0.0F)
  43       return 2;
  44    return 1;
  45 }
  46
  47
  48 /**
  49  * Helper for initializing a vertex array.
  50  */
  51 static void
  52 init_array(struct gl_context *ctx, struct gl_vertex_array *cl,
  53            unsigned size, const void *pointer)
  54 {
  55    memset(cl, 0, sizeof(*cl));
  56
  57    cl->Size = size;
  58    cl->Type = GL_FLOAT;
  59    cl->Format = GL_RGBA;
  60    cl->StrideB = 0;
  61    cl->_ElementSize = cl->Size * sizeof(GLfloat);
  62    cl->Ptr = pointer;
  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
  74 init_legacy_currval(struct gl_context *ctx)
  75 {
  76    struct vbo_context *vbo = vbo_context(ctx);
  77    GLuint i;
  78
  79    /* Set up a constant (StrideB == 0) array for each current
  80     * attribute:
  81     */
  82    for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
  83       struct gl_vertex_array *cl = &vbo->currval[VERT_ATTRIB_FF(i)];
  84
  85       init_array(ctx, cl,
  86                  check_size(ctx->Current.Attrib[i]),
  87                  ctx->Current.Attrib[i]);
  88    }
  89 }
  90
  91
  92 static void
  93 init_generic_currval(struct gl_context *ctx)
  94 {
  95    struct vbo_context *vbo = vbo_context(ctx);
  96    GLuint i;
  97
  98    for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
  99       struct gl_vertex_array *cl = &vbo->currval[VBO_ATTRIB_GENERIC0 + i];
 100
 101       init_array(ctx, cl, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]);
 102    }
 103 }
 104
 105
 106 static void
 107 init_mat_currval(struct gl_context *ctx)
 108 {
 109    struct vbo_context *vbo = vbo_context(ctx);
 110    GLuint i;
 111
 112    /* Set up a constant (StrideB == 0) array for each current
 113     * attribute:
 114     */
 115    for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 116       struct gl_vertex_array *cl =
 117          &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i];
 118       unsigned size;
 119
 120       /* Size is fixed for the material attributes, for others will
 121        * be determined at runtime:
 122        */
 123       switch (i) {
 124       case MAT_ATTRIB_FRONT_SHININESS:
 125       case MAT_ATTRIB_BACK_SHININESS:
 126          size = 1;
 127          break;
 128       case MAT_ATTRIB_FRONT_INDEXES:
 129       case MAT_ATTRIB_BACK_INDEXES:
 130          size = 3;
 131          break;
 132       default:
 133          size = 4;
 134          break;
 135       }
 136
 137       init_array(ctx, cl, size, ctx->Light.Material.Attrib[i]);
 138    }
 139 }
 140
 141 static void
 142 vbo_draw_indirect_prims(struct gl_context *ctx,
 143                         GLuint mode,
 144                         struct gl_buffer_object *indirect_data,
 145                         GLsizeiptr indirect_offset,
 146                         unsigned draw_count,
 147                         unsigned stride,
 148                         struct gl_buffer_object *indirect_params,
 149                         GLsizeiptr indirect_params_offset,
 150                         const struct _mesa_index_buffer *ib)
 151 {
 152    struct vbo_context *vbo = vbo_context(ctx);
 153    struct _mesa_prim *prim;
 154    GLsizei i;
 155
 156    prim = calloc(draw_count, sizeof(*prim));
 157    if (prim == NULL) {
 158       _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDraw%sIndirect%s",
 159                   (draw_count > 1) ? "Multi" : "",
 160                   ib ? "Elements" : "Arrays",
 161                   indirect_params ? "CountARB" : "");
 162       return;
 163    }
 164
 165    prim[0].begin = 1;
 166    prim[draw_count - 1].end = 1;
 167    for (i = 0; i < draw_count; ++i, indirect_offset += stride) {
 168       prim[i].mode = mode;
 169       prim[i].indexed = !!ib;
 170       prim[i].indirect_offset = indirect_offset;
 171       prim[i].is_indirect = 1;
 172       prim[i].draw_id = i;
 173    }
 174
 175    vbo->draw_prims(ctx, prim, draw_count,
 176                    ib, false, 0, ~0,
 177                    NULL, 0,
 178                    ctx->DrawIndirectBuffer);
 179
 180    free(prim);
 181 }
 182
 183
 184 GLboolean
 185 _vbo_CreateContext(struct gl_context *ctx)
 186 {
 187    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 188
 189    ctx->vbo_context = vbo;
 190
 191    /* Initialize the arrayelt helper
 192     */
 193    if (!ctx->aelt_context &&
 194        !_ae_create_context(ctx)) {
 195       return GL_FALSE;
 196    }
 197
 198    init_legacy_currval(ctx);
 199    init_generic_currval(ctx);
 200    init_mat_currval(ctx);
 201    vbo_set_indirect_draw_func(ctx, vbo_draw_indirect_prims);
 202
 203    /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
 204     * of vertex program active.
 205     */
 206    {
 207       GLuint i;
 208
 209       /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
 210       STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
 211
 212       /* identity mapping */
 213       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++)
 214          vbo->map_vp_none[i] = i;
 215       /* map material attribs to generic slots */
 216       for (i = 0; i < MAT_ATTRIB_MAX; i++)
 217          vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
 218             = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
 219
 220       for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++)
 221          vbo->map_vp_arb[i] = i;
 222    }
 223
 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 (ctx->API == API_OPENGL_COMPAT)
 231       vbo_save_init(ctx);
 232
 233    _math_init_eval();
 234
 235    return GL_TRUE;
 236 }
 237
 238
 239 void
 240 _vbo_DestroyContext(struct gl_context *ctx)
 241 {
 242    struct vbo_context *vbo = vbo_context(ctx);
 243
 244    if (ctx->aelt_context) {
 245       _ae_destroy_context(ctx);
 246       ctx->aelt_context = NULL;
 247    }
 248
 249    if (vbo) {
 250       GLuint i;
 251
 252       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 253          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 254       }
 255
 256       vbo_exec_destroy(ctx);
 257       if (ctx->API == API_OPENGL_COMPAT)
 258          vbo_save_destroy(ctx);
 259       free(vbo);
 260       ctx->vbo_context = NULL;
 261    }
 262 }
 263
 264
 265 void
 266 vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 267 {
 268    struct vbo_context *vbo = vbo_context(ctx);
 269    vbo->draw_prims = func;
 270 }
 271
 272
 273 void
 274 vbo_set_indirect_draw_func(struct gl_context *ctx,
 275                            vbo_indirect_draw_func func)
 276 {
 277    struct vbo_context *vbo = vbo_context(ctx);
 278    vbo->draw_indirect_prims = func;
 279 }