src/gallium/drivers/svga/svga_swtnl_backend.c

   1 /**********************************************************
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  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_buffer_reference(&svga_render->vbuf, NULL);
  83    if (new_ibuf)
  84       pipe_buffer_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                                              16,
  90                                              PIPE_BUFFER_USAGE_VERTEX,
  91                                              svga_render->vbuf_size);
  92       if(!svga_render->vbuf) {
  93          svga_context_flush(svga, NULL);
  94          svga_render->vbuf = pipe_buffer_create(screen,
  95                                                 16,
  96                                                 PIPE_BUFFER_USAGE_VERTEX,
  97                                                 svga_render->vbuf_size);
  98          assert(svga_render->vbuf);
  99       }
 100
 101       svga->swtnl.new_vdecl = TRUE;
 102       svga_render->vbuf_offset = 0;
 103    } else {
 104       svga_render->vbuf_offset += svga_render->vbuf_used;
 105    }
 106
 107    svga_render->vbuf_used = 0;
 108
 109    if (svga->swtnl.new_vdecl)
 110       svga_render->vdecl_offset = svga_render->vbuf_offset;
 111
 112    return TRUE;
 113 }
 114
 115 static void *
 116 svga_vbuf_render_map_vertices( struct vbuf_render *render )
 117 {
 118    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 119    struct svga_context *svga = svga_render->svga;
 120    struct pipe_screen *screen = svga->pipe.screen;
 121
 122    char *ptr = (char*)pipe_buffer_map(screen,
 123                                       svga_render->vbuf,
 124                                       PIPE_BUFFER_USAGE_CPU_WRITE |
 125                                       PIPE_BUFFER_USAGE_FLUSH_EXPLICIT |
 126                                       PIPE_BUFFER_USAGE_DISCARD |
 127                                       PIPE_BUFFER_USAGE_UNSYNCHRONIZED);
 128    return ptr + svga_render->vbuf_offset;
 129 }
 130
 131 static void
 132 svga_vbuf_render_unmap_vertices( struct vbuf_render *render,
 133                                  ushort min_index,
 134                                  ushort max_index )
 135 {
 136    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 137    struct svga_context *svga = svga_render->svga;
 138    struct pipe_screen *screen = svga->pipe.screen;
 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(screen, svga_render->vbuf, offset, length);
 145    pipe_buffer_unmap(screen, svga_render->vbuf);
 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_sumbit_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    svga_vbuf_sumbit_state(svga_render);
 226
 227    /* Need to call update_state() again as the draw module may have
 228     * altered some of our state behind our backs.  Testcase:
 229     * redbook/polys.c
 230     */
 231    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 232
 233    ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 234    if (ret != PIPE_OK) {
 235       svga_context_flush(svga, NULL);
 236       ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias, nr);
 237       svga->swtnl.new_vbuf = TRUE;
 238       assert(ret == PIPE_OK);
 239    }
 240 }
 241
 242
 243 static void
 244 svga_vbuf_render_draw( struct vbuf_render *render,
 245                        const ushort *indices,
 246                        uint nr_indices)
 247 {
 248    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 249    struct svga_context *svga = svga_render->svga;
 250    struct pipe_screen *screen = svga->pipe.screen;
 251    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset) / svga_render->vertex_size;
 252    boolean ret;
 253    size_t size = 2 * nr_indices;
 254
 255    assert(( svga_render->vbuf_offset - svga_render->vdecl_offset) % svga_render->vertex_size == 0);
 256
 257    if (svga_render->ibuf_size < svga_render->ibuf_offset + size)
 258       pipe_buffer_reference(&svga_render->ibuf, NULL);
 259
 260    if (!svga_render->ibuf) {
 261       svga_render->ibuf_size = MAX2(size, svga_render->ibuf_alloc_size);
 262       svga_render->ibuf = pipe_buffer_create(screen,
 263                                              2,
 264                                              PIPE_BUFFER_USAGE_VERTEX,
 265                                              svga_render->ibuf_size);
 266       svga_render->ibuf_offset = 0;
 267    }
 268
 269    pipe_buffer_write_nooverlap(screen, svga_render->ibuf,
 270                                  svga_render->ibuf_offset, 2 * nr_indices, indices);
 271
 272
 273    /* off to hardware */
 274    svga_vbuf_sumbit_state(svga_render);
 275
 276    /* Need to call update_state() again as the draw module may have
 277     * altered some of our state behind our backs.  Testcase:
 278     * redbook/polys.c
 279     */
 280    svga_update_state_retry( svga, SVGA_STATE_HW_DRAW );
 281
 282    ret = svga_hwtnl_draw_range_elements(svga->hwtnl,
 283                                         svga_render->ibuf,
 284                                         2,
 285                                         svga_render->min_index,
 286                                         svga_render->max_index,
 287                                         svga_render->prim,
 288                                         svga_render->ibuf_offset / 2, nr_indices, bias);
 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                                            svga_render->min_index,
 295                                            svga_render->max_index,
 296                                            svga_render->prim,
 297                                            svga_render->ibuf_offset / 2, nr_indices, bias);
 298       svga->swtnl.new_vbuf = TRUE;
 299       assert(ret == PIPE_OK);
 300    }
 301
 302    svga_render->ibuf_offset += size;
 303 }
 304
 305
 306 static void
 307 svga_vbuf_render_release_vertices( struct vbuf_render *render )
 308 {
 309
 310 }
 311
 312
 313 static void
 314 svga_vbuf_render_destroy( struct vbuf_render *render )
 315 {
 316    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 317
 318    pipe_buffer_reference(&svga_render->vbuf, NULL);
 319    pipe_buffer_reference(&svga_render->ibuf, NULL);
 320    FREE(svga_render);
 321 }
 322
 323
 324 /**
 325  * Create a new primitive render.
 326  */
 327 struct vbuf_render *
 328 svga_vbuf_render_create( struct svga_context *svga )
 329 {
 330    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 331
 332    svga_render->svga = svga;
 333    svga_render->ibuf_size = 0;
 334    svga_render->vbuf_size = 0;
 335    svga_render->ibuf_alloc_size = 4*1024;
 336    svga_render->vbuf_alloc_size = 64*1024;
 337    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 338    svga_render->base.max_indices = 65536;
 339    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 340    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 341    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 342    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 343    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 344    svga_render->base.draw = svga_vbuf_render_draw;
 345    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 346    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 347    svga_render->base.destroy = svga_vbuf_render_destroy;
 348
 349    return &svga_render->base;
 350 }