src/gallium/drivers/svga/svga_swtnl_backend.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "draw/draw_vbuf.h"
  27 #include "draw/draw_context.h"
  28 #include "draw/draw_vertex.h"
  29
  30 #include "util/u_debug.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_math.h"
  33 #include "util/u_memory.h"
  34
  35 #include "svga_context.h"
  36 #include "svga_state.h"
  37 #include "svga_swtnl.h"
  38
  39 #include "svga_types.h"
  40 #include "svga_reg.h"
  41 #include "svga3d_reg.h"
  42 #include "svga_draw.h"
  43 #include "svga_shader.h"
  44 #include "svga_swtnl_private.h"
  45
  46
  47 static const struct vertex_info *
  48 svga_vbuf_render_get_vertex_info( struct vbuf_render *render )
  49 {
  50    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  51    struct svga_context *svga = svga_render->svga;
  52
  53    svga_swtnl_update_vdecl(svga);
  54
  55    return &svga_render->vertex_info;
  56 }
  57
  58
  59 static boolean
  60 svga_vbuf_render_allocate_vertices( struct vbuf_render *render,
  61                                     ushort vertex_size,
  62                                     ushort nr_vertices )
  63 {
  64    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  65    struct svga_context *svga = svga_render->svga;
  66    struct pipe_screen *screen = svga->pipe.screen;
  67    size_t size = (size_t)nr_vertices * (size_t)vertex_size;
  68    boolean new_vbuf = FALSE;
  69    boolean new_ibuf = FALSE;
  70
  71    SVGA_STATS_TIME_PUSH(svga_sws(svga),
  72                         SVGA_STATS_TIME_VBUFRENDERALLOCVERT);
  73
  74    if (svga_render->vertex_size != vertex_size)
  75       svga->swtnl.new_vdecl = TRUE;
  76    svga_render->vertex_size = (size_t)vertex_size;
  77
  78    if (svga->swtnl.new_vbuf)
  79       new_ibuf = new_vbuf = TRUE;
  80    svga->swtnl.new_vbuf = FALSE;
  81
  82    if (svga_render->vbuf_size < svga_render->vbuf_offset + svga_render->vbuf_used + size)
  83       new_vbuf = TRUE;
  84
  85    if (new_vbuf)
  86       pipe_resource_reference(&svga_render->vbuf, NULL);
  87    if (new_ibuf)
  88       pipe_resource_reference(&svga_render->ibuf, NULL);
  89
  90    if (!svga_render->vbuf) {
  91       svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
  92       svga_render->vbuf = pipe_buffer_create(screen,
  93                                              PIPE_BIND_VERTEX_BUFFER,
  94                                              PIPE_USAGE_STREAM,
  95                                              svga_render->vbuf_size);
  96       if(!svga_render->vbuf) {
  97          svga_context_flush(svga, NULL);
  98          assert(!svga_render->vbuf);
  99          svga_render->vbuf = pipe_buffer_create(screen,
 100                                                 PIPE_BIND_VERTEX_BUFFER,
 101                                                 PIPE_USAGE_STREAM,
 102                                                 svga_render->vbuf_size);
 103          /* The buffer allocation may fail if we run out of memory.
 104           * The draw module's vbuf code should handle that without crashing.
 105           */
 106       }
 107
 108       svga->swtnl.new_vdecl = TRUE;
 109       svga_render->vbuf_offset = 0;
 110    } else {
 111       svga_render->vbuf_offset += svga_render->vbuf_used;
 112    }
 113
 114    svga_render->vbuf_used = 0;
 115
 116    if (svga->swtnl.new_vdecl)
 117       svga_render->vdecl_offset = svga_render->vbuf_offset;
 118
 119    SVGA_STATS_TIME_POP(svga_sws(svga));
 120
 121    return TRUE;
 122 }
 123
 124 static void *
 125 svga_vbuf_render_map_vertices( struct vbuf_render *render )
 126 {
 127    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 128    struct svga_context *svga = svga_render->svga;
 129    void * retPtr = NULL;
 130
 131    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 132                         SVGA_STATS_TIME_VBUFRENDERMAPVERT);
 133
 134    if (svga_render->vbuf) {
 135       char *ptr = (char*)pipe_buffer_map(&svga->pipe,
 136                                          svga_render->vbuf,
 137                                          PIPE_TRANSFER_WRITE |
 138                                          PIPE_TRANSFER_FLUSH_EXPLICIT |
 139                                          PIPE_TRANSFER_DISCARD_RANGE |
 140                                          PIPE_TRANSFER_UNSYNCHRONIZED,
 141                                          &svga_render->vbuf_transfer);
 142       if (ptr) {
 143          svga_render->vbuf_ptr = ptr;
 144          retPtr = ptr + svga_render->vbuf_offset;
 145       }
 146       else {
 147          svga_render->vbuf_ptr = NULL;
 148          svga_render->vbuf_transfer = NULL;
 149          retPtr = NULL;
 150       }
 151    }
 152    else {
 153       /* we probably ran out of memory when allocating the vertex buffer */
 154       retPtr = NULL;
 155    }
 156
 157    SVGA_STATS_TIME_POP(svga_sws(svga));
 158    return retPtr;
 159 }
 160
 161 static void
 162 svga_vbuf_render_unmap_vertices( struct vbuf_render *render,
 163                                  ushort min_index,
 164                                  ushort max_index )
 165 {
 166    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 167    struct svga_context *svga = svga_render->svga;
 168    unsigned offset, length;
 169    size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
 170
 171    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 172                         SVGA_STATS_TIME_VBUFRENDERUNMAPVERT);
 173
 174    offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
 175    length = svga_render->vertex_size * (max_index + 1 - min_index);
 176
 177    if (0) {
 178       /* dump vertex data */
 179       const float *f = (const float *) ((char *) svga_render->vbuf_ptr +
 180                                         svga_render->vbuf_offset);
 181       unsigned i;
 182       debug_printf("swtnl vertex data:\n");
 183       for (i = 0; i < length / 4; i += 4) {
 184          debug_printf("%u: %f %f %f %f\n", i, f[i], f[i+1], f[i+2], f[i+3]);
 185       }
 186    }
 187
 188    pipe_buffer_flush_mapped_range(&svga->pipe,
 189                                   svga_render->vbuf_transfer,
 190                                   offset, length);
 191    pipe_buffer_unmap(&svga->pipe, svga_render->vbuf_transfer);
 192    svga_render->min_index = min_index;
 193    svga_render->max_index = max_index;
 194    svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
 195
 196    SVGA_STATS_TIME_POP(svga_sws(svga));
 197 }
 198
 199 static void
 200 svga_vbuf_render_set_primitive( struct vbuf_render *render,
 201                                 enum pipe_prim_type prim )
 202 {
 203    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 204    svga_render->prim = prim;
 205 }
 206
 207 static void
 208 svga_vbuf_submit_state( struct svga_vbuf_render *svga_render )
 209 {
 210    struct svga_context *svga = svga_render->svga;
 211    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 212    enum pipe_error ret;
 213    unsigned i;
 214    static const unsigned zero[PIPE_MAX_ATTRIBS] = {0};
 215
 216    /* if the vdecl or vbuf hasn't changed do nothing */
 217    if (!svga->swtnl.new_vdecl)
 218       return;
 219
 220    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 221                         SVGA_STATS_TIME_VBUFSUBMITSTATE);
 222
 223    memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
 224
 225    /* flush the hw state */
 226    ret = svga_hwtnl_flush(svga->hwtnl);
 227    if (ret != PIPE_OK) {
 228       svga_context_flush(svga, NULL);
 229       ret = svga_hwtnl_flush(svga->hwtnl);
 230       /* if we hit this path we might become synced with hw */
 231       svga->swtnl.new_vbuf = TRUE;
 232       assert(ret == PIPE_OK);
 233    }
 234
 235    for (i = 0; i < svga_render->vdecl_count; i++) {
 236       vdecl[i].array.offset += svga_render->vdecl_offset;
 237    }
 238
 239    svga_hwtnl_vertex_decls(svga->hwtnl,
 240                            svga_render->vdecl_count,
 241                            vdecl,
 242                            zero,
 243                            svga_render->layout_id);
 244
 245    /* Specify the vertex buffer (there's only ever one) */
 246    {
 247       struct pipe_vertex_buffer vb;
 248       vb.buffer = svga_render->vbuf;
 249       vb.buffer_offset = svga_render->vdecl_offset;
 250       vb.stride = vdecl[0].array.stride;
 251       vb.user_buffer = NULL;
 252       svga_hwtnl_vertex_buffers(svga->hwtnl, 1, &vb);
 253    }
 254
 255    /* We have already taken care of flatshading, so let the hwtnl
 256     * module use whatever is most convenient:
 257     */
 258    if (svga->state.sw.need_pipeline) {
 259       svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
 260       svga_hwtnl_set_fillmode(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
 261    }
 262    else {
 263       svga_hwtnl_set_flatshade( svga->hwtnl,
 264                                 svga->curr.rast->templ.flatshade ||
 265                                 svga->state.hw_draw.fs->uses_flat_interp,
 266                                 svga->curr.rast->templ.flatshade_first );
 267
 268       svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 269    }
 270
 271    svga->swtnl.new_vdecl = FALSE;
 272    SVGA_STATS_TIME_POP(svga_sws(svga));
 273 }
 274
 275 static void
 276 svga_vbuf_render_draw_arrays( struct vbuf_render *render,
 277                               unsigned start, uint nr )
 278 {
 279    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 280    struct svga_context *svga = svga_render->svga;
 281    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 282    enum pipe_error ret = PIPE_OK;
 283    /* instancing will already have been resolved at this point by 'draw' */
 284    const unsigned start_instance = 0;
 285    const unsigned instance_count = 1;
 286
 287    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_VBUFDRAWARRAYS);
 288
 289    /* off to hardware */
 290    svga_vbuf_submit_state(svga_render);
 291
 292    /* Need to call update_state() again as the draw module may have
 293     * altered some of our state behind our backs.  Testcase:
 294     * redbook/polys.c
 295     */
 296    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 297
 298    ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr,
 299                                 start_instance, instance_count);
 300    if (ret != PIPE_OK) {
 301       svga_context_flush(svga, NULL);
 302       ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim,
 303                                    start + bias, nr,
 304                                    start_instance, instance_count);
 305       svga->swtnl.new_vbuf = TRUE;
 306       assert(ret == PIPE_OK);
 307    }
 308    SVGA_STATS_TIME_POP(svga_sws(svga));
 309 }
 310
 311
 312 static void
 313 svga_vbuf_render_draw_elements( struct vbuf_render *render,
 314                                 const ushort *indices,
 315                                 uint nr_indices)
 316 {
 317    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 318    struct svga_context *svga = svga_render->svga;
 319    struct pipe_screen *screen = svga->pipe.screen;
 320    int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 321    boolean ret;
 322    size_t size = 2 * nr_indices;
 323    /* instancing will already have been resolved at this point by 'draw' */
 324    const unsigned start_instance = 0;
 325    const unsigned instance_count = 1;
 326
 327    assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
 328
 329    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_VBUFDRAWELEMENTS);
 330
 331    if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
 332       pipe_resource_reference(&svga_render->ibuf, NULL);
 333
 334    if (!svga_render->ibuf) {
 335       svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
 336       svga_render->ibuf = pipe_buffer_create(screen,
 337                                              PIPE_BIND_INDEX_BUFFER,
 338                                              PIPE_USAGE_STREAM,
 339                                              svga_render->ibuf_size);
 340       svga_render->ibuf_offset = 0;
 341    }
 342
 343    pipe_buffer_write_nooverlap(&svga->pipe, svga_render->ibuf,
 344                                svga_render->ibuf_offset, 2 * nr_indices, indices);
 345
 346    /* off to hardware */
 347    svga_vbuf_submit_state(svga_render);
 348
 349    /* Need to call update_state() again as the draw module may have
 350     * altered some of our state behind our backs.  Testcase:
 351     * redbook/polys.c
 352     */
 353    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 354
 355    ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 356                                         svga_render->ibuf,
 357                                         2,
 358                                         bias,
 359                                         svga_render->min_index,
 360                                         svga_render->max_index,
 361                                         svga_render->prim,
 362                                         svga_render->ibuf_offset / 2, nr_indices,
 363                                         start_instance, instance_count);
 364    if(ret != PIPE_OK) {
 365       svga_context_flush(svga, NULL);
 366       ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 367                                            svga_render->ibuf,
 368                                            2,
 369                                            bias,
 370                                            svga_render->min_index,
 371                                            svga_render->max_index,
 372                                            svga_render->prim,
 373                                            svga_render->ibuf_offset / 2,
 374                                            nr_indices,
 375                                            start_instance, instance_count);
 376       svga->swtnl.new_vbuf = TRUE;
 377       assert(ret == PIPE_OK);
 378    }
 379    svga_render->ibuf_offset += size;
 380
 381    SVGA_STATS_TIME_POP(svga_sws(svga));
 382 }
 383
 384
 385 static void
 386 svga_vbuf_render_release_vertices( struct vbuf_render *render )
 387 {
 388
 389 }
 390
 391
 392 static void
 393 svga_vbuf_render_destroy( struct vbuf_render *render )
 394 {
 395    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 396
 397    pipe_resource_reference(&svga_render->vbuf, NULL);
 398    pipe_resource_reference(&svga_render->ibuf, NULL);
 399    FREE(svga_render);
 400 }
 401
 402
 403 /**
 404  * Create a new primitive render.
 405  */
 406 struct vbuf_render *
 407 svga_vbuf_render_create( struct svga_context *svga )
 408 {
 409    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 410
 411    svga_render->svga = svga;
 412    svga_render->ibuf_size = 0;
 413    svga_render->vbuf_size = 0;
 414    svga_render->ibuf_alloc_size = 4*1024;
 415    svga_render->vbuf_alloc_size = 64*1024;
 416    svga_render->layout_id = SVGA3D_INVALID_ID;
 417    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 418    svga_render->base.max_indices = 65536;
 419    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 420    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 421    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 422    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 423    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 424    svga_render->base.draw_elements = svga_vbuf_render_draw_elements;
 425    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 426    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 427    svga_render->base.destroy = svga_vbuf_render_destroy;
 428
 429    return &svga_render->base;
 430 }