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 "main/vtxfmt.h"
  32 #include "main/api_arrayelt.h"
  33 #include "main/arrayobj.h"
  34 #include "main/varray.h"
  35 #include "vbo.h"
  36 #include "vbo_private.h"
  37
  38
  39 static GLuint
  40 check_size(const GLfloat *attr)
  41 {
  42    if (attr[3] != 1.0F)
  43       return 4;
  44    if (attr[2] != 0.0F)
  45       return 3;
  46    if (attr[1] != 0.0F)
  47       return 2;
  48    return 1;
  49 }
  50
  51
  52 /**
  53  * Helper for initializing a vertex array.
  54  */
  55 static void
  56 init_array(struct gl_context *ctx, struct gl_vertex_array *array,
  57            unsigned size, const void *pointer)
  58 {
  59    memset(array, 0, sizeof(*array));
  60
  61    array->Size = size;
  62    array->Type = GL_FLOAT;
  63    array->Format = GL_RGBA;
  64    array->StrideB = 0;
  65    array->_ElementSize = array->Size * sizeof(GLfloat);
  66    array->Ptr = pointer;
  67
  68    _mesa_reference_buffer_object(ctx, &array->BufferObj,
  69                                  ctx->Shared->NullBufferObj);
  70 }
  71
  72
  73 /**
  74  * Set up the vbo->currval arrays to point at the context's current
  75  * vertex attributes (with strides = 0).
  76  */
  77 static void
  78 init_legacy_currval(struct gl_context *ctx)
  79 {
  80    struct vbo_context *vbo = vbo_context(ctx);
  81    GLuint i;
  82
  83    /* Set up a constant (StrideB == 0) array for each current
  84     * attribute:
  85     */
  86    for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
  87       struct gl_vertex_array *array = &vbo->currval[VERT_ATTRIB_FF(i)];
  88
  89       init_array(ctx, array,
  90                  check_size(ctx->Current.Attrib[i]),
  91                  ctx->Current.Attrib[i]);
  92    }
  93 }
  94
  95
  96 static void
  97 init_generic_currval(struct gl_context *ctx)
  98 {
  99    struct vbo_context *vbo = vbo_context(ctx);
 100    GLuint i;
 101
 102    for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
 103       struct gl_vertex_array *array = &vbo->currval[VBO_ATTRIB_GENERIC0 + i];
 104
 105       init_array(ctx, array, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]);
 106    }
 107 }
 108
 109
 110 static void
 111 init_mat_currval(struct gl_context *ctx)
 112 {
 113    struct vbo_context *vbo = vbo_context(ctx);
 114    GLuint i;
 115
 116    /* Set up a constant (StrideB == 0) array for each current
 117     * attribute:
 118     */
 119    for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 120       struct gl_vertex_array *array =
 121          &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i];
 122       unsigned size;
 123
 124       /* Size is fixed for the material attributes, for others will
 125        * be determined at runtime:
 126        */
 127       switch (i) {
 128       case MAT_ATTRIB_FRONT_SHININESS:
 129       case MAT_ATTRIB_BACK_SHININESS:
 130          size = 1;
 131          break;
 132       case MAT_ATTRIB_FRONT_INDEXES:
 133       case MAT_ATTRIB_BACK_INDEXES:
 134          size = 3;
 135          break;
 136       default:
 137          size = 4;
 138          break;
 139       }
 140
 141       init_array(ctx, array, size, ctx->Light.Material.Attrib[i]);
 142    }
 143 }
 144
 145
 146 /**
 147  * Fallback for when a driver does not call vbo_set_indirect_draw_func().
 148  */
 149 static void
 150 vbo_draw_indirect_prims(struct gl_context *ctx,
 151                         GLuint mode,
 152                         struct gl_buffer_object *indirect_buffer,
 153                         GLsizeiptr indirect_offset,
 154                         unsigned draw_count,
 155                         unsigned stride,
 156                         struct gl_buffer_object *indirect_draw_count_buffer,
 157                         GLsizeiptr indirect_draw_count_offset,
 158                         const struct _mesa_index_buffer *ib)
 159 {
 160    struct vbo_context *vbo = vbo_context(ctx);
 161    struct _mesa_prim *prim;
 162    GLsizei i;
 163
 164    prim = calloc(draw_count, sizeof(*prim));
 165    if (prim == NULL) {
 166       _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDraw%sIndirect%s",
 167                   (draw_count > 1) ? "Multi" : "",
 168                   ib ? "Elements" : "Arrays",
 169                   indirect_buffer ? "CountARB" : "");
 170       return;
 171    }
 172
 173    prim[0].begin = 1;
 174    prim[draw_count - 1].end = 1;
 175    for (i = 0; i < draw_count; ++i, indirect_offset += stride) {
 176       prim[i].mode = mode;
 177       prim[i].indexed = !!ib;
 178       prim[i].indirect_offset = indirect_offset;
 179       prim[i].is_indirect = 1;
 180       prim[i].draw_id = i;
 181    }
 182
 183    /* This should always be true at this time */
 184    assert(indirect_buffer == ctx->DrawIndirectBuffer);
 185
 186    vbo->draw_prims(ctx, prim, draw_count,
 187                    ib, false, 0, ~0,
 188                    NULL, 0,
 189                    indirect_buffer);
 190
 191    free(prim);
 192 }
 193
 194
 195 void
 196 _vbo_install_exec_vtxfmt(struct gl_context *ctx)
 197 {
 198    struct vbo_context *vbo = vbo_context(ctx);
 199
 200    _mesa_install_exec_vtxfmt(ctx, &vbo->exec.vtxfmt);
 201 }
 202
 203
 204 void
 205 vbo_exec_invalidate_state(struct gl_context *ctx)
 206 {
 207    struct vbo_context *vbo = vbo_context(ctx);
 208    struct vbo_exec_context *exec = &vbo->exec;
 209
 210    if (ctx->NewState & (_NEW_PROGRAM | _NEW_ARRAY)) {
 211       exec->array.recalculate_inputs = GL_TRUE;
 212
 213       _ae_invalidate_state(ctx);
 214    }
 215    /* If _mesa_update_state is called in a non draw code path,
 216     * changes in the VAO need to be captured.
 217     */
 218    if (ctx->Array.VAO->NewArrays)
 219       exec->array.recalculate_inputs = GL_TRUE;
 220
 221    if (ctx->NewState & _NEW_EVAL)
 222       exec->eval.recalculate_maps = GL_TRUE;
 223 }
 224
 225
 226 GLboolean
 227 _vbo_CreateContext(struct gl_context *ctx)
 228 {
 229    struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
 230
 231    ctx->vbo_context = vbo;
 232
 233    /* Initialize the arrayelt helper
 234     */
 235    if (!ctx->aelt_context &&
 236        !_ae_create_context(ctx)) {
 237       return GL_FALSE;
 238    }
 239
 240    init_legacy_currval(ctx);
 241    init_generic_currval(ctx);
 242    init_mat_currval(ctx);
 243    _vbo_init_inputs(&vbo->draw_arrays);
 244    vbo_set_indirect_draw_func(ctx, vbo_draw_indirect_prims);
 245
 246    /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
 247    STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
 248
 249    /* Hook our functions into exec and compile dispatch tables.  These
 250     * will pretty much be permanently installed, which means that the
 251     * vtxfmt mechanism can be removed now.
 252     */
 253    vbo_exec_init(ctx);
 254    if (ctx->API == API_OPENGL_COMPAT)
 255       vbo_save_init(ctx);
 256
 257    vbo->VAO = _mesa_new_vao(ctx, ~((GLuint)0));
 258    /* The exec VAO assumes to have all arributes bound to binding 0 */
 259    for (unsigned i = 0; i < VERT_ATTRIB_MAX; ++i)
 260       _mesa_vertex_attrib_binding(ctx, vbo->VAO, i, 0, false);
 261
 262    _math_init_eval();
 263
 264    return GL_TRUE;
 265 }
 266
 267
 268 void
 269 _vbo_DestroyContext(struct gl_context *ctx)
 270 {
 271    struct vbo_context *vbo = vbo_context(ctx);
 272
 273    if (ctx->aelt_context) {
 274       _ae_destroy_context(ctx);
 275       ctx->aelt_context = NULL;
 276    }
 277
 278    if (vbo) {
 279       GLuint i;
 280
 281       for (i = 0; i < VBO_ATTRIB_MAX; i++) {
 282          _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
 283       }
 284
 285       vbo_exec_destroy(ctx);
 286       if (ctx->API == API_OPENGL_COMPAT)
 287          vbo_save_destroy(ctx);
 288       _mesa_reference_vao(ctx, &vbo->VAO, NULL);
 289       free(vbo);
 290       ctx->vbo_context = NULL;
 291    }
 292 }
 293
 294
 295 void
 296 vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
 297 {
 298    struct vbo_context *vbo = vbo_context(ctx);
 299    vbo->draw_prims = func;
 300 }
 301
 302
 303 void
 304 vbo_set_indirect_draw_func(struct gl_context *ctx,
 305                            vbo_indirect_draw_func func)
 306 {
 307    struct vbo_context *vbo = vbo_context(ctx);
 308    vbo->draw_indirect_prims = func;
 309 }