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 "pipe/p_inlines.h"
  32 #include "util/u_math.h"
  33 #include "util/u_memory.h"
  34 #include "util/u_simple_shaders.h"
  35
  36 #include "svga_context.h"
  37 #include "svga_state.h"
  38 #include "svga_swtnl.h"
  39
  40 #include "svga_types.h"
  41 #include "svga_reg.h"
  42 #include "svga3d_reg.h"
  43 #include "svga_draw.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_buffer_reference(&svga_render->vbuf, NULL);
  84    if (new_ibuf)
  85       pipe_buffer_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                                              0,
  91                                              PIPE_BUFFER_USAGE_VERTEX,
  92                                              svga_render->vbuf_size);
  93       if(!svga_render->vbuf) {
  94          svga_context_flush(svga, NULL);
  95          svga_render->vbuf = pipe_buffer_create(screen,
  96                                                 0,
  97                                                 PIPE_BUFFER_USAGE_VERTEX,
  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    struct pipe_screen *screen = svga->pipe.screen;
 122
 123    char *ptr = (char*)pipe_buffer_map(screen,
 124                                       svga_render->vbuf,
 125                                       PIPE_BUFFER_USAGE_CPU_WRITE |
 126                                       PIPE_BUFFER_USAGE_FLUSH_EXPLICIT);
 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    struct pipe_screen *screen = svga->pipe.screen;
 138    unsigned offset, length;
 139    size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
 140
 141    offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
 142    length = svga_render->vertex_size * (max_index + 1 - min_index);
 143    pipe_buffer_flush_mapped_range(screen, svga_render->vbuf, offset, length);
 144    pipe_buffer_unmap(screen, svga_render->vbuf);
 145    svga_render->min_index = min_index;
 146    svga_render->max_index = max_index;
 147    svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
 148 }
 149
 150 static boolean
 151 svga_vbuf_render_set_primitive( struct vbuf_render *render,
 152                                 unsigned prim )
 153 {
 154    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 155    svga_render->prim = prim;
 156
 157    return TRUE;
 158 }
 159
 160 static void
 161 svga_vbuf_sumbit_state( struct svga_vbuf_render *svga_render )
 162 {
 163    struct svga_context *svga = svga_render->svga;
 164    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 165    enum pipe_error ret;
 166    int i;
 167
 168    /* if the vdecl or vbuf hasn't changed do nothing */
 169    if (!svga->swtnl.new_vdecl)
 170       return;
 171
 172    memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
 173
 174    /* flush the hw state */
 175    ret = svga_hwtnl_flush(svga->hwtnl);
 176    if (ret) {
 177       svga_context_flush(svga, NULL);
 178       ret = svga_hwtnl_flush(svga->hwtnl);
 179       /* if we hit this path we might become synced with hw */
 180       svga->swtnl.new_vbuf = TRUE;
 181       assert(ret == 0);
 182    }
 183
 184    svga_hwtnl_reset_vdecl(svga->hwtnl, svga_render->vdecl_count);
 185
 186    for (i = 0; i < svga_render->vdecl_count; i++) {
 187       vdecl[i].array.offset += svga_render->vdecl_offset;
 188
 189       svga_hwtnl_vdecl( svga->hwtnl,
 190                         i,
 191                         &vdecl[i],
 192                         svga_render->vbuf );
 193    }
 194
 195    /* We have already taken care of flatshading, so let the hwtnl
 196     * module use whatever is most convenient:
 197     */
 198    if (svga->state.sw.need_pipeline) {
 199       svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
 200       svga_hwtnl_set_unfilled(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
 201    }
 202    else {
 203       svga_hwtnl_set_flatshade( svga->hwtnl,
 204                                 svga->curr.rast->templ.flatshade,
 205                                 svga->curr.rast->templ.flatshade_first );
 206
 207       svga_hwtnl_set_unfilled( svga->hwtnl,
 208                                svga->curr.rast->hw_unfilled );
 209    }
 210
 211    svga->swtnl.new_vdecl = FALSE;
 212 }
 213
 214 static void
 215 svga_vbuf_render_draw_arrays( struct vbuf_render *render,
 216                               unsigned start,
 217                               uint nr )
 218 {
 219    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 220    struct svga_context *svga = svga_render->svga;
 221    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 222    enum pipe_error ret = 0;
 223
 224    svga_vbuf_sumbit_state(svga_render);
 225
 226    /* Need to call update_state() again as the draw module may have
 227     * altered some of our state behind our backs.  Testcase:
 228     * redbook/polys.c
 229     */
 230    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 231
 232    ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 233    if (ret != PIPE_OK) {
 234       svga_context_flush(svga, NULL);
 235       ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 236       svga->swtnl.new_vbuf = TRUE;
 237       assert(ret == PIPE_OK);
 238    }
 239 }
 240
 241
 242 static void
 243 svga_vbuf_render_draw( struct vbuf_render *render,
 244                        const ushort *indices,
 245                        uint nr_indices)
 246 {
 247    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 248    struct svga_context *svga = svga_render->svga;
 249    struct pipe_screen *screen = svga->pipe.screen;
 250    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 251    boolean ret;
 252    size_t size = 2 * nr_indices;
 253
 254    assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
 255
 256    if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
 257       pipe_buffer_reference(&svga_render->ibuf, NULL);
 258
 259    if (!svga_render->ibuf) {
 260       svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
 261       svga_render->ibuf = pipe_buffer_create(screen,
 262                                              0,
 263                                              PIPE_BUFFER_USAGE_VERTEX,
 264                                              svga_render->ibuf_size);
 265       svga_render->ibuf_offset = 0;
 266    }
 267
 268    pipe_buffer_write(screen, svga_render->ibuf,
 269                      svga_render->ibuf_offset, 2 * nr_indices, indices);
 270
 271
 272    /* off to hardware */
 273    svga_vbuf_sumbit_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                                         svga_render->min_index,
 285                                         svga_render->max_index,
 286                                         svga_render->prim,
 287                                         svga_render->ibuf_offset / 2, nr_indices, bias);
 288    if(ret != PIPE_OK) {
 289       svga_context_flush(svga, NULL);
 290       ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 291                                            svga_render->ibuf,
 292                                            2,
 293                                            svga_render->min_index,
 294                                            svga_render->max_index,
 295                                            svga_render->prim,
 296                                            svga_render->ibuf_offset / 2, nr_indices, bias);
 297       svga->swtnl.new_vbuf = TRUE;
 298       assert(ret == PIPE_OK);
 299    }
 300
 301    svga_render->ibuf_offset += size;
 302 }
 303
 304
 305 static void
 306 svga_vbuf_render_release_vertices( struct vbuf_render *render )
 307 {
 308
 309 }
 310
 311
 312 static void
 313 svga_vbuf_render_destroy( struct vbuf_render *render )
 314 {
 315    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 316
 317    pipe_buffer_reference(&svga_render->vbuf, NULL);
 318    pipe_buffer_reference(&svga_render->ibuf, NULL);
 319    FREE(svga_render);
 320 }
 321
 322
 323 /**
 324  * Create a new primitive render.
 325  */
 326 struct vbuf_render *
 327 svga_vbuf_render_create( struct svga_context *svga )
 328 {
 329    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 330
 331    svga_render->svga = svga;
 332    svga_render->ibuf_size = 0;
 333    svga_render->vbuf_size = 0;
 334    svga_render->ibuf_alloc_size = 4*1024;
 335    svga_render->vbuf_alloc_size = 64*1024;
 336    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 337    svga_render->base.max_indices = 65536;
 338    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 339    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 340    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 341    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 342    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 343    svga_render->base.draw = svga_vbuf_render_draw;
 344    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 345    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 346    svga_render->base.destroy = svga_vbuf_render_destroy;
 347
 348    return &svga_render->base;
 349 }