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