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_swtnl_private.h"
  44
  45
  46 static const struct vertex_info *
  47 svga_vbuf_render_get_vertex_info( struct vbuf_render *render )
  48 {
  49    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  50    struct svga_context *svga = svga_render->svga;
  51
  52    svga_swtnl_update_vdecl(svga);
  53
  54    return &svga_render->vertex_info;
  55 }
  56
  57
  58 static boolean
  59 svga_vbuf_render_allocate_vertices( struct vbuf_render *render,
  60                                     ushort vertex_size,
  61                                     ushort nr_vertices )
  62 {
  63    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  64    struct svga_context *svga = svga_render->svga;
  65    struct pipe_screen *screen = svga->pipe.screen;
  66    size_t size = (size_t)nr_vertices * (size_t)vertex_size;
  67    boolean new_vbuf = FALSE;
  68    boolean new_ibuf = FALSE;
  69
  70    if (svga_render->vertex_size != vertex_size)
  71       svga->swtnl.new_vdecl = TRUE;
  72    svga_render->vertex_size = (size_t)vertex_size;
  73
  74    if (svga->swtnl.new_vbuf)
  75       new_ibuf = new_vbuf = TRUE;
  76    svga->swtnl.new_vbuf = FALSE;
  77
  78    if (svga_render->vbuf_size < svga_render->vbuf_offset + svga_render->vbuf_used + size)
  79       new_vbuf = TRUE;
  80
  81    if (new_vbuf)
  82       pipe_resource_reference(&svga_render->vbuf, NULL);
  83    if (new_ibuf)
  84       pipe_resource_reference(&svga_render->ibuf, NULL);
  85
  86    if (!svga_render->vbuf) {
  87       svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
  88       svga_render->vbuf = pipe_buffer_create(screen,
  89                                              PIPE_BIND_VERTEX_BUFFER,
  90                                              PIPE_USAGE_STREAM,
  91                                              svga_render->vbuf_size);
  92       if(!svga_render->vbuf) {
  93          svga_context_flush(svga, NULL);
  94          assert(!svga_render->vbuf);
  95          svga_render->vbuf = pipe_buffer_create(screen,
  96                                                 PIPE_BIND_VERTEX_BUFFER,
  97                                                 PIPE_USAGE_STREAM,
  98                                                 svga_render->vbuf_size);
  99          assert(svga_render->vbuf);
 100       }
 101
 102       svga->swtnl.new_vdecl = TRUE;
 103       svga_render->vbuf_offset = 0;
 104    } else {
 105       svga_render->vbuf_offset += svga_render->vbuf_used;
 106    }
 107
 108    svga_render->vbuf_used = 0;
 109
 110    if (svga->swtnl.new_vdecl)
 111       svga_render->vdecl_offset = svga_render->vbuf_offset;
 112
 113    return TRUE;
 114 }
 115
 116 static void *
 117 svga_vbuf_render_map_vertices( struct vbuf_render *render )
 118 {
 119    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 120    struct svga_context *svga = svga_render->svga;
 121
 122    char *ptr = (char*)pipe_buffer_map(&svga->pipe,
 123                                       svga_render->vbuf,
 124                                       PIPE_TRANSFER_WRITE |
 125                                       PIPE_TRANSFER_FLUSH_EXPLICIT |
 126                                       PIPE_TRANSFER_DISCARD |
 127                                       PIPE_TRANSFER_UNSYNCHRONIZED,
 128                                       &svga_render->vbuf_transfer);
 129    return ptr + svga_render->vbuf_offset;
 130 }
 131
 132 static void
 133 svga_vbuf_render_unmap_vertices( struct vbuf_render *render,
 134                                  ushort min_index,
 135                                  ushort max_index )
 136 {
 137    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 138    struct svga_context *svga = svga_render->svga;
 139    unsigned offset, length;
 140    size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
 141
 142    offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
 143    length = svga_render->vertex_size * (max_index + 1 - min_index);
 144    pipe_buffer_flush_mapped_range(&svga->pipe,
 145                                   svga_render->vbuf_transfer,
 146                                   offset, length);
 147    pipe_buffer_unmap(&svga->pipe, svga_render->vbuf_transfer);
 148    svga_render->min_index = min_index;
 149    svga_render->max_index = max_index;
 150    svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
 151 }
 152
 153 static boolean
 154 svga_vbuf_render_set_primitive( struct vbuf_render *render,
 155                                 unsigned prim )
 156 {
 157    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 158    svga_render->prim = prim;
 159
 160    return TRUE;
 161 }
 162
 163 static void
 164 svga_vbuf_submit_state( struct svga_vbuf_render *svga_render )
 165 {
 166    struct svga_context *svga = svga_render->svga;
 167    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 168    enum pipe_error ret;
 169    int i;
 170
 171    /* if the vdecl or vbuf hasn't changed do nothing */
 172    if (!svga->swtnl.new_vdecl)
 173       return;
 174
 175    memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
 176
 177    /* flush the hw state */
 178    ret = svga_hwtnl_flush(svga->hwtnl);
 179    if (ret) {
 180       svga_context_flush(svga, NULL);
 181       ret = svga_hwtnl_flush(svga->hwtnl);
 182       /* if we hit this path we might become synced with hw */
 183       svga->swtnl.new_vbuf = TRUE;
 184       assert(ret == 0);
 185    }
 186
 187    svga_hwtnl_reset_vdecl(svga->hwtnl, svga_render->vdecl_count);
 188
 189    for (i = 0; i < svga_render->vdecl_count; i++) {
 190       vdecl[i].array.offset += svga_render->vdecl_offset;
 191
 192       svga_hwtnl_vdecl( svga->hwtnl,
 193                         i,
 194                         &vdecl[i],
 195                         svga_render->vbuf );
 196    }
 197
 198    /* We have already taken care of flatshading, so let the hwtnl
 199     * module use whatever is most convenient:
 200     */
 201    if (svga->state.sw.need_pipeline) {
 202       svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
 203       svga_hwtnl_set_unfilled(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
 204    }
 205    else {
 206       svga_hwtnl_set_flatshade( svga->hwtnl,
 207                                 svga->curr.rast->templ.flatshade,
 208                                 svga->curr.rast->templ.flatshade_first );
 209
 210       svga_hwtnl_set_unfilled( svga->hwtnl,
 211                                svga->curr.rast->hw_unfilled );
 212    }
 213
 214    svga->swtnl.new_vdecl = FALSE;
 215 }
 216
 217 static void
 218 svga_vbuf_render_draw_arrays( struct vbuf_render *render,
 219                               unsigned start,
 220                               uint nr )
 221 {
 222    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 223    struct svga_context *svga = svga_render->svga;
 224    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 225    enum pipe_error ret = 0;
 226
 227    /* off to hardware */
 228    svga_vbuf_submit_state(svga_render);
 229
 230    /* Need to call update_state() again as the draw module may have
 231     * altered some of our state behind our backs.  Testcase:
 232     * redbook/polys.c
 233     */
 234    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 235
 236    ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 237    if (ret != PIPE_OK) {
 238       svga_context_flush(svga, NULL);
 239       ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 240       svga->swtnl.new_vbuf = TRUE;
 241       assert(ret == PIPE_OK);
 242    }
 243 }
 244
 245
 246 static void
 247 svga_vbuf_render_draw_elements( struct vbuf_render *render,
 248                                 const ushort *indices,
 249                                 uint nr_indices)
 250 {
 251    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 252    struct svga_context *svga = svga_render->svga;
 253    struct pipe_screen *screen = svga->pipe.screen;
 254    int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 255    boolean ret;
 256    size_t size = 2 * nr_indices;
 257
 258    assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
 259
 260    if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
 261       pipe_resource_reference(&svga_render->ibuf, NULL);
 262
 263    if (!svga_render->ibuf) {
 264       svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
 265       svga_render->ibuf = pipe_buffer_create(screen,
 266                                              PIPE_BIND_INDEX_BUFFER,
 267                                              PIPE_USAGE_STREAM,
 268                                              svga_render->ibuf_size);
 269       svga_render->ibuf_offset = 0;
 270    }
 271
 272    pipe_buffer_write_nooverlap(&svga->pipe, svga_render->ibuf,
 273                                svga_render->ibuf_offset, 2 * nr_indices, indices);
 274
 275    /* off to hardware */
 276    svga_vbuf_submit_state(svga_render);
 277
 278    /* Need to call update_state() again as the draw module may have
 279     * altered some of our state behind our backs.  Testcase:
 280     * redbook/polys.c
 281     */
 282    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 283
 284    ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 285                                         svga_render->ibuf,
 286                                         2,
 287                                         bias,
 288                                         svga_render->min_index,
 289                                         svga_render->max_index,
 290                                         svga_render->prim,
 291                                         svga_render->ibuf_offset / 2, nr_indices);
 292    if(ret != PIPE_OK) {
 293       svga_context_flush(svga, NULL);
 294       ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 295                                            svga_render->ibuf,
 296                                            2,
 297                                            bias,
 298                                            svga_render->min_index,
 299                                            svga_render->max_index,
 300                                            svga_render->prim,
 301                                            svga_render->ibuf_offset / 2, nr_indices);
 302       svga->swtnl.new_vbuf = TRUE;
 303       assert(ret == PIPE_OK);
 304    }
 305
 306    svga_render->ibuf_offset += size;
 307 }
 308
 309
 310 static void
 311 svga_vbuf_render_release_vertices( struct vbuf_render *render )
 312 {
 313
 314 }
 315
 316
 317 static void
 318 svga_vbuf_render_destroy( struct vbuf_render *render )
 319 {
 320    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 321
 322    pipe_resource_reference(&svga_render->vbuf, NULL);
 323    pipe_resource_reference(&svga_render->ibuf, NULL);
 324    FREE(svga_render);
 325 }
 326
 327
 328 /**
 329  * Create a new primitive render.
 330  */
 331 struct vbuf_render *
 332 svga_vbuf_render_create( struct svga_context *svga )
 333 {
 334    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 335
 336    svga_render->svga = svga;
 337    svga_render->ibuf_size = 0;
 338    svga_render->vbuf_size = 0;
 339    svga_render->ibuf_alloc_size = 4*1024;
 340    svga_render->vbuf_alloc_size = 64*1024;
 341    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 342    svga_render->base.max_indices = 65536;
 343    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 344    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 345    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 346    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 347    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 348    svga_render->base.draw_elements = svga_vbuf_render_draw_elements;
 349    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 350    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 351    svga_render->base.destroy = svga_vbuf_render_destroy;
 352
 353    return &svga_render->base;
 354 }