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    SVGA_STATS_TIME_PUSH(svga_sws(svga),
  72                         SVGA_STATS_TIME_VBUFRENDERALLOCVERT);
  73
  74    if (svga_render->vertex_size != vertex_size)
  75       svga->swtnl.new_vdecl = TRUE;
  76    svga_render->vertex_size = (size_t)vertex_size;
  77
  78    if (svga->swtnl.new_vbuf)
  79       new_ibuf = new_vbuf = TRUE;
  80    svga->swtnl.new_vbuf = FALSE;
  81
  82    if (svga_render->vbuf_size
  83        < svga_render->vbuf_offset + svga_render->vbuf_used + size)
  84       new_vbuf = TRUE;
  85
  86    if (new_vbuf)
  87       pipe_resource_reference(&svga_render->vbuf, NULL);
  88    if (new_ibuf)
  89       pipe_resource_reference(&svga_render->ibuf, NULL);
  90
  91    if (!svga_render->vbuf) {
  92       svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
  93       svga_render->vbuf = pipe_buffer_create(screen,
  94                                              PIPE_BIND_VERTEX_BUFFER,
  95                                              PIPE_USAGE_STREAM,
  96                                              svga_render->vbuf_size);
  97       if (!svga_render->vbuf) {
  98          svga_context_flush(svga, NULL);
  99          assert(!svga_render->vbuf);
 100          svga_render->vbuf = pipe_buffer_create(screen,
 101                                                 PIPE_BIND_VERTEX_BUFFER,
 102                                                 PIPE_USAGE_STREAM,
 103                                                 svga_render->vbuf_size);
 104          /* The buffer allocation may fail if we run out of memory.
 105           * The draw module's vbuf code should handle that without crashing.
 106           */
 107       }
 108
 109       svga->swtnl.new_vdecl = TRUE;
 110       svga_render->vbuf_offset = 0;
 111    } else {
 112       svga_render->vbuf_offset += svga_render->vbuf_used;
 113    }
 114
 115    svga_render->vbuf_used = 0;
 116
 117    if (svga->swtnl.new_vdecl)
 118       svga_render->vdecl_offset = svga_render->vbuf_offset;
 119
 120    SVGA_STATS_TIME_POP(svga_sws(svga));
 121
 122    return TRUE;
 123 }
 124
 125
 126 static void *
 127 svga_vbuf_render_map_vertices(struct vbuf_render *render)
 128 {
 129    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 130    struct svga_context *svga = svga_render->svga;
 131    void * retPtr = NULL;
 132
 133    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 134                         SVGA_STATS_TIME_VBUFRENDERMAPVERT);
 135
 136    if (svga_render->vbuf) {
 137       char *ptr = (char*)pipe_buffer_map(&svga->pipe,
 138                                          svga_render->vbuf,
 139                                          PIPE_TRANSFER_WRITE |
 140                                          PIPE_TRANSFER_FLUSH_EXPLICIT |
 141                                          PIPE_TRANSFER_DISCARD_RANGE |
 142                                          PIPE_TRANSFER_UNSYNCHRONIZED,
 143                                          &svga_render->vbuf_transfer);
 144       if (ptr) {
 145          svga_render->vbuf_ptr = ptr;
 146          retPtr = ptr + svga_render->vbuf_offset;
 147       }
 148       else {
 149          svga_render->vbuf_ptr = NULL;
 150          svga_render->vbuf_transfer = NULL;
 151          retPtr = NULL;
 152       }
 153    }
 154    else {
 155       /* we probably ran out of memory when allocating the vertex buffer */
 156       retPtr = NULL;
 157    }
 158
 159    SVGA_STATS_TIME_POP(svga_sws(svga));
 160    return retPtr;
 161 }
 162
 163
 164 static void
 165 svga_vbuf_render_unmap_vertices(struct vbuf_render *render,
 166                                 ushort min_index,
 167                                 ushort max_index)
 168 {
 169    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 170    struct svga_context *svga = svga_render->svga;
 171    unsigned offset, length;
 172    size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
 173
 174    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 175                         SVGA_STATS_TIME_VBUFRENDERUNMAPVERT);
 176
 177    offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
 178    length = svga_render->vertex_size * (max_index + 1 - min_index);
 179
 180    if (0) {
 181       /* dump vertex data */
 182       const float *f = (const float *) ((char *) svga_render->vbuf_ptr +
 183                                         svga_render->vbuf_offset);
 184       unsigned i;
 185       debug_printf("swtnl vertex data:\n");
 186       for (i = 0; i < length / 4; i += 4) {
 187          debug_printf("%u: %f %f %f %f\n", i, f[i], f[i+1], f[i+2], f[i+3]);
 188       }
 189    }
 190
 191    pipe_buffer_flush_mapped_range(&svga->pipe,
 192                                   svga_render->vbuf_transfer,
 193                                   offset, length);
 194    pipe_buffer_unmap(&svga->pipe, svga_render->vbuf_transfer);
 195    svga_render->min_index = min_index;
 196    svga_render->max_index = max_index;
 197    svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
 198
 199    SVGA_STATS_TIME_POP(svga_sws(svga));
 200 }
 201
 202
 203 static void
 204 svga_vbuf_render_set_primitive(struct vbuf_render *render,
 205                                enum pipe_prim_type prim)
 206 {
 207    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 208    svga_render->prim = prim;
 209 }
 210
 211
 212 static void
 213 svga_vbuf_submit_state(struct svga_vbuf_render *svga_render)
 214 {
 215    struct svga_context *svga = svga_render->svga;
 216    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 217    enum pipe_error ret;
 218    unsigned i;
 219    static const unsigned zero[PIPE_MAX_ATTRIBS] = {0};
 220
 221    /* if the vdecl or vbuf hasn't changed do nothing */
 222    if (!svga->swtnl.new_vdecl)
 223       return;
 224
 225    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 226                         SVGA_STATS_TIME_VBUFSUBMITSTATE);
 227
 228    memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
 229
 230    /* flush the hw state */
 231    ret = svga_hwtnl_flush(svga->hwtnl);
 232    if (ret != PIPE_OK) {
 233       svga_context_flush(svga, NULL);
 234       ret = svga_hwtnl_flush(svga->hwtnl);
 235       /* if we hit this path we might become synced with hw */
 236       svga->swtnl.new_vbuf = TRUE;
 237       assert(ret == PIPE_OK);
 238    }
 239
 240    for (i = 0; i < svga_render->vdecl_count; i++) {
 241       vdecl[i].array.offset += svga_render->vdecl_offset;
 242    }
 243
 244    svga_hwtnl_vertex_decls(svga->hwtnl,
 245                            svga_render->vdecl_count,
 246                            vdecl,
 247                            zero,
 248                            svga_render->layout_id);
 249
 250    /* Specify the vertex buffer (there's only ever one) */
 251    {
 252       struct pipe_vertex_buffer vb;
 253       vb.is_user_buffer = false;
 254       vb.buffer.resource = svga_render->vbuf;
 255       vb.buffer_offset = svga_render->vdecl_offset;
 256       vb.stride = vdecl[0].array.stride;
 257       svga_hwtnl_vertex_buffers(svga->hwtnl, 1, &vb);
 258    }
 259
 260    /* We have already taken care of flatshading, so let the hwtnl
 261     * module use whatever is most convenient:
 262     */
 263    if (svga->state.sw.need_pipeline) {
 264       svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
 265       svga_hwtnl_set_fillmode(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
 266    }
 267    else {
 268       svga_hwtnl_set_flatshade(svga->hwtnl,
 269                                 svga->curr.rast->templ.flatshade ||
 270                                 svga->state.hw_draw.fs->uses_flat_interp,
 271                                 svga->curr.rast->templ.flatshade_first);
 272
 273       svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 274    }
 275
 276    svga->swtnl.new_vdecl = FALSE;
 277    SVGA_STATS_TIME_POP(svga_sws(svga));
 278 }
 279
 280
 281 static void
 282 svga_vbuf_render_draw_arrays(struct vbuf_render *render,
 283                               unsigned start, uint nr)
 284 {
 285    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 286    struct svga_context *svga = svga_render->svga;
 287    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset)
 288       / svga_render->vertex_size;
 289    enum pipe_error ret = PIPE_OK;
 290    /* instancing will already have been resolved at this point by 'draw' */
 291    const unsigned start_instance = 0;
 292    const unsigned instance_count = 1;
 293
 294    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_VBUFDRAWARRAYS);
 295
 296    /* off to hardware */
 297    svga_vbuf_submit_state(svga_render);
 298
 299    /* Need to call update_state() again as the draw module may have
 300     * altered some of our state behind our backs.  Testcase:
 301     * redbook/polys.c
 302     */
 303    svga_update_state_retry(svga, SVGA_STATE_HW_DRAW);
 304
 305    ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim, start + bias,
 306                                  nr, start_instance, instance_count);
 307    if (ret != PIPE_OK) {
 308       svga_context_flush(svga, NULL);
 309       ret = svga_hwtnl_draw_arrays(svga->hwtnl, svga_render->prim,
 310                                    start + bias, nr,
 311                                    start_instance, instance_count);
 312       svga->swtnl.new_vbuf = TRUE;
 313       assert(ret == PIPE_OK);
 314    }
 315    SVGA_STATS_TIME_POP(svga_sws(svga));
 316 }
 317
 318
 319 static void
 320 svga_vbuf_render_draw_elements(struct vbuf_render *render,
 321                                 const ushort *indices,
 322                                 uint nr_indices)
 323 {
 324    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 325    struct svga_context *svga = svga_render->svga;
 326    int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset)
 327       / svga_render->vertex_size;
 328    boolean ret;
 329    /* instancing will already have been resolved at this point by 'draw' */
 330    const struct pipe_draw_info info = {
 331       .index_size = 2,
 332       .mode = svga_render->prim,
 333       .has_user_indices = 1,
 334       .index.user = indices,
 335       .start_instance = 0,
 336       .instance_count = 1,
 337       .index_bias = bias,
 338       .min_index = svga_render->min_index,
 339       .max_index = svga_render->max_index,
 340       .start = 0,
 341       .count = nr_indices
 342    };
 343
 344    assert((svga_render->vbuf_offset - svga_render->vdecl_offset)
 345           % svga_render->vertex_size == 0);
 346
 347    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_VBUFDRAWELEMENTS);
 348
 349    /* off to hardware */
 350    svga_vbuf_submit_state(svga_render);
 351
 352    /* Need to call update_state() again as the draw module may have
 353     * altered some of our state behind our backs.  Testcase:
 354     * redbook/polys.c
 355     */
 356    svga_update_state_retry(svga, SVGA_STATE_HW_DRAW);
 357    ret = svga_hwtnl_draw_range_elements(svga->hwtnl, &info, nr_indices);
 358    if (ret != PIPE_OK) {
 359       svga_context_flush(svga, NULL);
 360       ret = svga_hwtnl_draw_range_elements(svga->hwtnl, &info, nr_indices);
 361       svga->swtnl.new_vbuf = TRUE;
 362       assert(ret == PIPE_OK);
 363    }
 364    SVGA_STATS_TIME_POP(svga_sws(svga));
 365 }
 366
 367
 368 static void
 369 svga_vbuf_render_release_vertices(struct vbuf_render *render)
 370 {
 371
 372 }
 373
 374
 375 static void
 376 svga_vbuf_render_destroy(struct vbuf_render *render)
 377 {
 378    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 379
 380    pipe_resource_reference(&svga_render->vbuf, NULL);
 381    pipe_resource_reference(&svga_render->ibuf, NULL);
 382    FREE(svga_render);
 383 }
 384
 385
 386 /**
 387  * Create a new primitive render.
 388  */
 389 struct vbuf_render *
 390 svga_vbuf_render_create(struct svga_context *svga)
 391 {
 392    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 393
 394    svga_render->svga = svga;
 395    svga_render->ibuf_size = 0;
 396    svga_render->vbuf_size = 0;
 397    svga_render->ibuf_alloc_size = 4*1024;
 398    svga_render->vbuf_alloc_size = 64*1024;
 399    svga_render->layout_id = SVGA3D_INVALID_ID;
 400    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 401    svga_render->base.max_indices = 65536;
 402    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 403    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 404    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 405    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 406    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 407    svga_render->base.draw_elements = svga_vbuf_render_draw_elements;
 408    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 409    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 410    svga_render->base.destroy = svga_vbuf_render_destroy;
 411
 412    return &svga_render->base;
 413 }