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    if (svga_render->vertex_size != vertex_size)
  72       svga->swtnl.new_vdecl = TRUE;
  73    svga_render->vertex_size = (size_t)vertex_size;
  74
  75    if (svga->swtnl.new_vbuf)
  76       new_ibuf = new_vbuf = TRUE;
  77    svga->swtnl.new_vbuf = FALSE;
  78
  79    if (svga_render->vbuf_size < svga_render->vbuf_offset + svga_render->vbuf_used + size)
  80       new_vbuf = TRUE;
  81
  82    if (new_vbuf)
  83       pipe_resource_reference(&svga_render->vbuf, NULL);
  84    if (new_ibuf)
  85       pipe_resource_reference(&svga_render->ibuf, NULL);
  86
  87    if (!svga_render->vbuf) {
  88       svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
  89       svga_render->vbuf = pipe_buffer_create(screen,
  90                                              PIPE_BIND_VERTEX_BUFFER,
  91                                              PIPE_USAGE_STREAM,
  92                                              svga_render->vbuf_size);
  93       if(!svga_render->vbuf) {
  94          svga_context_flush(svga, NULL);
  95          assert(!svga_render->vbuf);
  96          svga_render->vbuf = pipe_buffer_create(screen,
  97                                                 PIPE_BIND_VERTEX_BUFFER,
  98                                                 PIPE_USAGE_STREAM,
  99                                                 svga_render->vbuf_size);
 100          /* The buffer allocation may fail if we run out of memory.
 101           * The draw module's vbuf code should handle that without crashing.
 102           */
 103       }
 104
 105       svga->swtnl.new_vdecl = TRUE;
 106       svga_render->vbuf_offset = 0;
 107    } else {
 108       svga_render->vbuf_offset += svga_render->vbuf_used;
 109    }
 110
 111    svga_render->vbuf_used = 0;
 112
 113    if (svga->swtnl.new_vdecl)
 114       svga_render->vdecl_offset = svga_render->vbuf_offset;
 115
 116    return TRUE;
 117 }
 118
 119 static void *
 120 svga_vbuf_render_map_vertices( struct vbuf_render *render )
 121 {
 122    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 123    struct svga_context *svga = svga_render->svga;
 124
 125    if (svga_render->vbuf) {
 126       char *ptr = (char*)pipe_buffer_map(&svga->pipe,
 127                                          svga_render->vbuf,
 128                                          PIPE_TRANSFER_WRITE |
 129                                          PIPE_TRANSFER_FLUSH_EXPLICIT |
 130                                          PIPE_TRANSFER_DISCARD_RANGE |
 131                                          PIPE_TRANSFER_UNSYNCHRONIZED,
 132                                          &svga_render->vbuf_transfer);
 133       if (ptr) {
 134          svga_render->vbuf_ptr = ptr;
 135          return ptr + svga_render->vbuf_offset;
 136       }
 137       else {
 138          svga_render->vbuf_ptr = NULL;
 139          svga_render->vbuf_transfer = NULL;
 140          return NULL;
 141       }
 142    }
 143    else {
 144       /* we probably ran out of memory when allocating the vertex buffer */
 145       return NULL;
 146    }
 147 }
 148
 149 static void
 150 svga_vbuf_render_unmap_vertices( struct vbuf_render *render,
 151                                  ushort min_index,
 152                                  ushort max_index )
 153 {
 154    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 155    struct svga_context *svga = svga_render->svga;
 156    unsigned offset, length;
 157    size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
 158
 159    offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
 160    length = svga_render->vertex_size * (max_index + 1 - min_index);
 161
 162    if (0) {
 163       /* dump vertex data */
 164       const float *f = (const float *) ((char *) svga_render->vbuf_ptr +
 165                                         svga_render->vbuf_offset);
 166       unsigned i;
 167       debug_printf("swtnl vertex data:\n");
 168       for (i = 0; i < length / 4; i += 4) {
 169          debug_printf("%u: %f %f %f %f\n", i, f[i], f[i+1], f[i+2], f[i+3]);
 170       }
 171    }
 172
 173    pipe_buffer_flush_mapped_range(&svga->pipe,
 174                                   svga_render->vbuf_transfer,
 175                                   offset, length);
 176    pipe_buffer_unmap(&svga->pipe, svga_render->vbuf_transfer);
 177    svga_render->min_index = min_index;
 178    svga_render->max_index = max_index;
 179    svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
 180 }
 181
 182 static void
 183 svga_vbuf_render_set_primitive( struct vbuf_render *render,
 184                                 enum pipe_prim_type prim )
 185 {
 186    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 187    svga_render->prim = prim;
 188 }
 189
 190 static void
 191 svga_vbuf_submit_state( struct svga_vbuf_render *svga_render )
 192 {
 193    struct svga_context *svga = svga_render->svga;
 194    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 195    enum pipe_error ret;
 196    unsigned i;
 197    static const unsigned zero[PIPE_MAX_ATTRIBS] = {0};
 198
 199    /* if the vdecl or vbuf hasn't changed do nothing */
 200    if (!svga->swtnl.new_vdecl)
 201       return;
 202
 203    memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
 204
 205    /* flush the hw state */
 206    ret = svga_hwtnl_flush(svga->hwtnl);
 207    if (ret != PIPE_OK) {
 208       svga_context_flush(svga, NULL);
 209       ret = svga_hwtnl_flush(svga->hwtnl);
 210       /* if we hit this path we might become synced with hw */
 211       svga->swtnl.new_vbuf = TRUE;
 212       assert(ret == PIPE_OK);
 213    }
 214
 215    for (i = 0; i < svga_render->vdecl_count; i++) {
 216       vdecl[i].array.offset += svga_render->vdecl_offset;
 217    }
 218
 219    svga_hwtnl_vertex_decls(svga->hwtnl,
 220                            svga_render->vdecl_count,
 221                            vdecl,
 222                            zero,
 223                            svga_render->layout_id);
 224
 225    /* Specify the vertex buffer (there's only ever one) */
 226    {
 227       struct pipe_vertex_buffer vb;
 228       vb.buffer = svga_render->vbuf;
 229       vb.buffer_offset = svga_render->vdecl_offset;
 230       vb.stride = vdecl[0].array.stride;
 231       vb.user_buffer = NULL;
 232       svga_hwtnl_vertex_buffers(svga->hwtnl, 1, &vb);
 233    }
 234
 235    /* We have already taken care of flatshading, so let the hwtnl
 236     * module use whatever is most convenient:
 237     */
 238    if (svga->state.sw.need_pipeline) {
 239       svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
 240       svga_hwtnl_set_fillmode(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
 241    }
 242    else {
 243       svga_hwtnl_set_flatshade( svga->hwtnl,
 244                                 svga->curr.rast->templ.flatshade ||
 245                                 svga->state.hw_draw.fs->uses_flat_interp,
 246                                 svga->curr.rast->templ.flatshade_first );
 247
 248       svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 249    }
 250
 251    svga->swtnl.new_vdecl = FALSE;
 252 }
 253
 254 static void
 255 svga_vbuf_render_draw_arrays( struct vbuf_render *render,
 256                               unsigned start, uint nr )
 257 {
 258    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 259    struct svga_context *svga = svga_render->svga;
 260    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 261    enum pipe_error ret = PIPE_OK;
 262    /* instancing will already have been resolved at this point by 'draw' */
 263    const unsigned start_instance = 0;
 264    const unsigned instance_count = 1;
 265
 266    /* off to hardware */
 267    svga_vbuf_submit_state(svga_render);
 268
 269    /* Need to call update_state() again as the draw module may have
 270     * altered some of our state behind our backs.  Testcase:
 271     * redbook/polys.c
 272     */
 273    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 274
 275    ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr,
 276                                 start_instance, instance_count);
 277    if (ret != PIPE_OK) {
 278       svga_context_flush(svga, NULL);
 279       ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim,
 280                                    start + bias, nr,
 281                                    start_instance, instance_count);
 282       svga->swtnl.new_vbuf = TRUE;
 283       assert(ret == PIPE_OK);
 284    }
 285 }
 286
 287
 288 static void
 289 svga_vbuf_render_draw_elements( struct vbuf_render *render,
 290                                 const ushort *indices,
 291                                 uint nr_indices)
 292 {
 293    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 294    struct svga_context *svga = svga_render->svga;
 295    struct pipe_screen *screen = svga->pipe.screen;
 296    int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 297    boolean ret;
 298    size_t size = 2 * nr_indices;
 299    /* instancing will already have been resolved at this point by 'draw' */
 300    const unsigned start_instance = 0;
 301    const unsigned instance_count = 1;
 302
 303    assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
 304
 305    if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
 306       pipe_resource_reference(&svga_render->ibuf, NULL);
 307
 308    if (!svga_render->ibuf) {
 309       svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
 310       svga_render->ibuf = pipe_buffer_create(screen,
 311                                              PIPE_BIND_INDEX_BUFFER,
 312                                              PIPE_USAGE_STREAM,
 313                                              svga_render->ibuf_size);
 314       svga_render->ibuf_offset = 0;
 315    }
 316
 317    pipe_buffer_write_nooverlap(&svga->pipe, svga_render->ibuf,
 318                                svga_render->ibuf_offset, 2 * nr_indices, indices);
 319
 320    /* off to hardware */
 321    svga_vbuf_submit_state(svga_render);
 322
 323    /* Need to call update_state() again as the draw module may have
 324     * altered some of our state behind our backs.  Testcase:
 325     * redbook/polys.c
 326     */
 327    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 328
 329    ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 330                                         svga_render->ibuf,
 331                                         2,
 332                                         bias,
 333                                         svga_render->min_index,
 334                                         svga_render->max_index,
 335                                         svga_render->prim,
 336                                         svga_render->ibuf_offset / 2, nr_indices,
 337                                         start_instance, instance_count);
 338    if(ret != PIPE_OK) {
 339       svga_context_flush(svga, NULL);
 340       ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 341                                            svga_render->ibuf,
 342                                            2,
 343                                            bias,
 344                                            svga_render->min_index,
 345                                            svga_render->max_index,
 346                                            svga_render->prim,
 347                                            svga_render->ibuf_offset / 2,
 348                                            nr_indices,
 349                                            start_instance, instance_count);
 350       svga->swtnl.new_vbuf = TRUE;
 351       assert(ret == PIPE_OK);
 352    }
 353
 354    svga_render->ibuf_offset += size;
 355 }
 356
 357
 358 static void
 359 svga_vbuf_render_release_vertices( struct vbuf_render *render )
 360 {
 361
 362 }
 363
 364
 365 static void
 366 svga_vbuf_render_destroy( struct vbuf_render *render )
 367 {
 368    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 369
 370    pipe_resource_reference(&svga_render->vbuf, NULL);
 371    pipe_resource_reference(&svga_render->ibuf, NULL);
 372    FREE(svga_render);
 373 }
 374
 375
 376 /**
 377  * Create a new primitive render.
 378  */
 379 struct vbuf_render *
 380 svga_vbuf_render_create( struct svga_context *svga )
 381 {
 382    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 383
 384    svga_render->svga = svga;
 385    svga_render->ibuf_size = 0;
 386    svga_render->vbuf_size = 0;
 387    svga_render->ibuf_alloc_size = 4*1024;
 388    svga_render->vbuf_alloc_size = 64*1024;
 389    svga_render->layout_id = SVGA3D_INVALID_ID;
 390    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 391    svga_render->base.max_indices = 65536;
 392    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 393    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 394    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 395    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 396    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 397    svga_render->base.draw_elements = svga_vbuf_render_draw_elements;
 398    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 399    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 400    svga_render->base.destroy = svga_vbuf_render_destroy;
 401
 402    return &svga_render->base;
 403 }