src/mesa/drivers/dri/nouveau/nouveau_vbo_t.c

   1 /*
   2  * Copyright (C) 2009-2010 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "nouveau_bufferobj.h"
  28 #include "nouveau_util.h"
  29
  30 #include "main/bufferobj.h"
  31 #include "main/image.h"
  32
  33 /* Arbitrary pushbuf length we can assume we can get with a single
  34  * WAIT_RING. */
  35 #define PUSHBUF_DWORDS 2048
  36
  37 /* Functions to set up struct nouveau_array_state from something like
  38  * a GL array or index buffer. */
  39
  40 static void
  41 vbo_init_array(struct nouveau_array_state *a, int attr, int stride,
  42                int fields, int type, struct gl_buffer_object *obj,
  43                const void *ptr, GLboolean map)
  44 {
  45         a->attr = attr;
  46         a->stride = stride;
  47         a->fields = fields;
  48         a->type = type;
  49
  50         if (_mesa_is_bufferobj(obj)) {
  51                 nouveau_bo_ref(to_nouveau_bufferobj(obj)->bo, &a->bo);
  52                 a->offset = (intptr_t)ptr;
  53
  54                 if (map) {
  55                         nouveau_bo_map(a->bo, NOUVEAU_BO_RD);
  56                         a->buf = a->bo->map + a->offset;
  57                 } else {
  58                         a->buf = NULL;
  59                 }
  60
  61         } else {
  62                 nouveau_bo_ref(NULL, &a->bo);
  63                 a->offset = 0;
  64
  65                 if (map)
  66                         a->buf = ptr;
  67                 else
  68                         a->buf = NULL;
  69         }
  70
  71         if (a->buf)
  72                 get_array_extract(a, &a->extract_u, &a->extract_f);
  73 }
  74
  75 static void
  76 vbo_deinit_array(struct nouveau_array_state *a)
  77 {
  78         if (a->bo) {
  79                 if (a->bo->map)
  80                         nouveau_bo_unmap(a->bo);
  81                 nouveau_bo_ref(NULL, &a->bo);
  82         }
  83
  84         a->buf = NULL;
  85         a->fields = 0;
  86 }
  87
  88 static void
  89 vbo_init_arrays(GLcontext *ctx, const struct _mesa_index_buffer *ib,
  90                 const struct gl_client_array **arrays)
  91 {
  92         struct nouveau_render_state *render = to_render_state(ctx);
  93         int i;
  94
  95         if (ib)
  96                 vbo_init_array(&render->ib, 0, 0, ib->count, ib->type,
  97                                ib->obj, ib->ptr, GL_TRUE);
  98
  99         for (i = 0; i < render->attr_count; i++) {
 100                 int attr = render->map[i];
 101
 102                 if (attr >= 0) {
 103                         const struct gl_client_array *array = arrays[attr];
 104                         int stride;
 105
 106                         if (render->mode == VBO &&
 107                             !_mesa_is_bufferobj(array->BufferObj))
 108                                 /* Pack client buffers. */
 109                                 stride = align(_mesa_sizeof_type(array->Type)
 110                                                * array->Size, 4);
 111                         else
 112                                 stride = array->StrideB;
 113
 114                         vbo_init_array(&render->attrs[attr], attr,
 115                                        stride, array->Size, array->Type,
 116                                        array->BufferObj, array->Ptr,
 117                                        render->mode == IMM);
 118                 }
 119         }
 120 }
 121
 122 static void
 123 vbo_deinit_arrays(GLcontext *ctx, const struct _mesa_index_buffer *ib,
 124                 const struct gl_client_array **arrays)
 125 {
 126         struct nouveau_render_state *render = to_render_state(ctx);
 127         int i;
 128
 129         if (ib)
 130                 vbo_deinit_array(&render->ib);
 131
 132         for (i = 0; i < render->attr_count; i++) {
 133                 int *attr = &render->map[i];
 134
 135                 if (*attr >= 0) {
 136                         vbo_deinit_array(&render->attrs[*attr]);
 137                         *attr = -1;
 138                 }
 139         }
 140
 141         render->attr_count = 0;
 142 }
 143
 144 /* Make some rendering decisions from the GL context. */
 145
 146 static void
 147 vbo_choose_render_mode(GLcontext *ctx, const struct gl_client_array **arrays)
 148 {
 149         struct nouveau_render_state *render = to_render_state(ctx);
 150         int i;
 151
 152         render->mode = VBO;
 153
 154         if (ctx->Light.Enabled) {
 155                 for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 156                         if (arrays[VERT_ATTRIB_GENERIC0 + i]->StrideB) {
 157                                 render->mode = IMM;
 158                                 break;
 159                         }
 160                 }
 161         }
 162
 163         if (render->mode == VBO)
 164                 render->attr_count = NUM_VERTEX_ATTRS;
 165         else
 166                 render->attr_count = 0;
 167 }
 168
 169 static void
 170 vbo_emit_attr(GLcontext *ctx, const struct gl_client_array **arrays, int attr)
 171 {
 172         struct nouveau_channel *chan = context_chan(ctx);
 173         struct nouveau_render_state *render = to_render_state(ctx);
 174         const struct gl_client_array *array = arrays[attr];
 175         struct nouveau_array_state *a = &render->attrs[attr];
 176         RENDER_LOCALS(ctx);
 177
 178         if (!array->StrideB) {
 179                 if (attr >= VERT_ATTRIB_GENERIC0)
 180                         /* nouveau_update_state takes care of materials. */
 181                         return;
 182
 183                 /* Constant attribute. */
 184                 vbo_init_array(a, attr, array->StrideB, array->Size,
 185                                array->Type, array->BufferObj, array->Ptr,
 186                                GL_TRUE);
 187                 EMIT_IMM(ctx, a, 0);
 188                 vbo_deinit_array(a);
 189
 190         } else {
 191                 /* Varying attribute. */
 192                 struct nouveau_attr_info *info = &TAG(vertex_attrs)[attr];
 193
 194                 if (render->mode == VBO) {
 195                         render->map[info->vbo_index] = attr;
 196                         render->vertex_size += array->_ElementSize;
 197                 } else {
 198                         render->map[render->attr_count++] = attr;
 199                         render->vertex_size += 4 * info->imm_fields;
 200                 }
 201         }
 202 }
 203
 204 #define MAT(a) (VERT_ATTRIB_GENERIC0 + MAT_ATTRIB_##a)
 205
 206 static void
 207 vbo_choose_attrs(GLcontext *ctx, const struct gl_client_array **arrays)
 208 {
 209         struct nouveau_render_state *render = to_render_state(ctx);
 210         int i;
 211
 212         /* Reset the vertex size. */
 213         render->vertex_size = 0;
 214
 215         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_COLOR0);
 216         if (ctx->Fog.ColorSumEnabled && !ctx->Light.Enabled)
 217                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_COLOR1);
 218
 219         for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 220                 if (ctx->Texture._EnabledCoordUnits & (1 << i))
 221                         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_TEX0 + i);
 222         }
 223
 224         if (ctx->Fog.Enabled && ctx->Fog.FogCoordinateSource == GL_FOG_COORD)
 225                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_FOG);
 226
 227         if (ctx->Light.Enabled ||
 228             (ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS))
 229                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_NORMAL);
 230
 231         if (ctx->Light.Enabled) {
 232                 vbo_emit_attr(ctx, arrays, MAT(FRONT_AMBIENT));
 233                 vbo_emit_attr(ctx, arrays, MAT(FRONT_DIFFUSE));
 234                 vbo_emit_attr(ctx, arrays, MAT(FRONT_SPECULAR));
 235                 vbo_emit_attr(ctx, arrays, MAT(FRONT_SHININESS));
 236
 237                 if (ctx->Light.Model.TwoSide) {
 238                         vbo_emit_attr(ctx, arrays, MAT(BACK_AMBIENT));
 239                         vbo_emit_attr(ctx, arrays, MAT(BACK_DIFFUSE));
 240                         vbo_emit_attr(ctx, arrays, MAT(BACK_SPECULAR));
 241                         vbo_emit_attr(ctx, arrays, MAT(BACK_SHININESS));
 242                 }
 243         }
 244
 245         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_POS);
 246 }
 247
 248 static unsigned
 249 get_max_client_stride(GLcontext *ctx, const struct gl_client_array **arrays)
 250 {
 251         struct nouveau_render_state *render = to_render_state(ctx);
 252         int i, s = 0;
 253
 254         for (i = 0; i < render->attr_count; i++) {
 255                 int attr = render->map[i];
 256
 257                 if (attr >= 0) {
 258                         const struct gl_client_array *a = arrays[attr];
 259
 260                         if (!_mesa_is_bufferobj(a->BufferObj))
 261                                 s = MAX2(a->StrideB, s);
 262                 }
 263         }
 264
 265         return s;
 266 }
 267
 268 static void
 269 TAG(vbo_render_prims)(GLcontext *ctx, const struct gl_client_array **arrays,
 270                       const struct _mesa_prim *prims, GLuint nr_prims,
 271                       const struct _mesa_index_buffer *ib,
 272                       GLboolean index_bounds_valid,
 273                       GLuint min_index, GLuint max_index);
 274
 275 static GLboolean
 276 vbo_maybe_split(GLcontext *ctx, const struct gl_client_array **arrays,
 277             const struct _mesa_prim *prims, GLuint nr_prims,
 278             const struct _mesa_index_buffer *ib,
 279             GLuint min_index, GLuint max_index)
 280 {
 281         struct nouveau_context *nctx = to_nouveau_context(ctx);
 282         struct nouveau_render_state *render = to_render_state(ctx);
 283         unsigned pushbuf_avail = PUSHBUF_DWORDS - 2 * (nctx->bo.count +
 284                                                        render->attr_count),
 285                 vert_avail = get_max_vertices(ctx, NULL, pushbuf_avail),
 286                 idx_avail = get_max_vertices(ctx, ib, pushbuf_avail);
 287         int stride;
 288
 289         /* Try to keep client buffers smaller than the scratch BOs. */
 290         if (render->mode == VBO &&
 291             (stride = get_max_client_stride(ctx, arrays)))
 292                     vert_avail = MIN2(vert_avail,
 293                                       RENDER_SCRATCH_SIZE / stride);
 294
 295         if (max_index - min_index > vert_avail ||
 296             (ib && ib->count > idx_avail)) {
 297                 struct split_limits limits = {
 298                         .max_verts = vert_avail,
 299                         .max_indices = idx_avail,
 300                         .max_vb_size = ~0,
 301                 };
 302
 303                 vbo_split_prims(ctx, arrays, prims, nr_prims, ib, min_index,
 304                                 max_index, TAG(vbo_render_prims), &limits);
 305                 return GL_TRUE;
 306         }
 307
 308         return GL_FALSE;
 309 }
 310
 311 /* VBO rendering path. */
 312
 313 static void
 314 vbo_bind_vertices(GLcontext *ctx, const struct gl_client_array **arrays,
 315                   GLint basevertex, GLuint min_index, GLuint max_index)
 316 {
 317         struct nouveau_render_state *render = to_render_state(ctx);
 318         int i;
 319
 320         for (i = 0; i < NUM_VERTEX_ATTRS; i++) {
 321                 int attr = render->map[i];
 322
 323                 if (attr >= 0) {
 324                         const struct gl_client_array *array = arrays[attr];
 325                         struct nouveau_array_state *a = &render->attrs[attr];
 326                         unsigned delta = (basevertex + min_index)
 327                                 * array->StrideB;
 328
 329                         if (a->bo) {
 330                                 a->offset = (intptr_t)array->Ptr + delta;
 331                         } else {
 332                                 int j, n = max_index - min_index + 1;
 333                                 char *sp = (char *)array->Ptr + delta;
 334                                 char *dp = get_scratch_vbo(ctx, n * a->stride,
 335                                                            &a->bo, &a->offset);
 336
 337                                 for (j = 0; j < n; j++)
 338                                         memcpy(dp + j * a->stride,
 339                                                sp + j * array->StrideB,
 340                                                a->stride);
 341                         }
 342                 }
 343         }
 344
 345         TAG(render_bind_vertices)(ctx);
 346 }
 347
 348 static void
 349 vbo_draw_vbo(GLcontext *ctx, const struct gl_client_array **arrays,
 350              const struct _mesa_prim *prims, GLuint nr_prims,
 351              const struct _mesa_index_buffer *ib, GLuint min_index,
 352              GLuint max_index)
 353 {
 354         struct nouveau_channel *chan = context_chan(ctx);
 355         dispatch_t dispatch;
 356         int delta = -min_index, basevertex = 0, i;
 357         RENDER_LOCALS(ctx);
 358
 359         get_array_dispatch(&to_render_state(ctx)->ib, &dispatch);
 360
 361         TAG(render_set_format)(ctx);
 362
 363         for (i = 0; i < nr_prims; i++) {
 364                 unsigned start = prims[i].start,
 365                         count = prims[i].count;
 366
 367                 if (i == 0 || basevertex != prims[i].basevertex) {
 368                         basevertex = prims[i].basevertex;
 369                         vbo_bind_vertices(ctx, arrays, basevertex,
 370                                           min_index, max_index);
 371                 }
 372
 373                 if (count > get_max_vertices(ctx, ib, AVAIL_RING(chan)))
 374                         WAIT_RING(chan, PUSHBUF_DWORDS);
 375
 376                 BATCH_BEGIN(nvgl_primitive(prims[i].mode));
 377                 dispatch(ctx, start, delta, count);
 378                 BATCH_END();
 379         }
 380 }
 381
 382 /* Immediate rendering path. */
 383
 384 static unsigned
 385 extract_id(struct nouveau_array_state *a, int i, int j)
 386 {
 387         return j;
 388 }
 389
 390 static void
 391 vbo_draw_imm(GLcontext *ctx, const struct gl_client_array **arrays,
 392              const struct _mesa_prim *prims, GLuint nr_prims,
 393              const struct _mesa_index_buffer *ib, GLuint min_index,
 394              GLuint max_index)
 395 {
 396         struct nouveau_render_state *render = to_render_state(ctx);
 397         struct nouveau_channel *chan = context_chan(ctx);
 398         extract_u_t extract = ib ? render->ib.extract_u : extract_id;
 399         int i, j, k;
 400         RENDER_LOCALS(ctx);
 401
 402         for (i = 0; i < nr_prims; i++) {
 403                 unsigned start = prims[i].start,
 404                         end = start + prims[i].count;
 405
 406                 if (prims[i].count > get_max_vertices(ctx, ib,
 407                                                       AVAIL_RING(chan)))
 408                         WAIT_RING(chan, PUSHBUF_DWORDS);
 409
 410                 BATCH_BEGIN(nvgl_primitive(prims[i].mode));
 411
 412                 for (; start < end; start++) {
 413                         j = prims[i].basevertex +
 414                                 extract(&render->ib, 0, start);
 415
 416                         for (k = 0; k < render->attr_count; k++)
 417                                 EMIT_IMM(ctx, &render->attrs[render->map[k]],
 418                                          j);
 419                 }
 420
 421                 BATCH_END();
 422         }
 423 }
 424
 425 /* draw_prims entry point when we're doing hw-tnl. */
 426
 427 static void
 428 TAG(vbo_render_prims)(GLcontext *ctx, const struct gl_client_array **arrays,
 429                       const struct _mesa_prim *prims, GLuint nr_prims,
 430                       const struct _mesa_index_buffer *ib,
 431                       GLboolean index_bounds_valid,
 432                       GLuint min_index, GLuint max_index)
 433 {
 434         struct nouveau_render_state *render = to_render_state(ctx);
 435
 436         if (!index_bounds_valid)
 437                 vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 438
 439         vbo_choose_render_mode(ctx, arrays);
 440         vbo_choose_attrs(ctx, arrays);
 441
 442         if (vbo_maybe_split(ctx, arrays, prims, nr_prims, ib, min_index,
 443                             max_index))
 444                 return;
 445
 446         vbo_init_arrays(ctx, ib, arrays);
 447
 448         if (render->mode == VBO)
 449                 vbo_draw_vbo(ctx, arrays, prims, nr_prims, ib, min_index,
 450                              max_index);
 451         else
 452                 vbo_draw_imm(ctx, arrays, prims, nr_prims, ib, min_index,
 453                              max_index);
 454
 455         vbo_deinit_arrays(ctx, ib, arrays);
 456 }