src/gallium/drivers/svga/svga_state_rss.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 "pipe/p_defines.h"
  27 #include "util/u_bitmask.h"
  28 #include "util/u_format.h"
  29 #include "util/u_inlines.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_math.h"
  32 #include "util/u_memory.h"
  33
  34 #include "svga_context.h"
  35 #include "svga_screen.h"
  36 #include "svga_state.h"
  37 #include "svga_cmd.h"
  38 #include "svga_format.h"
  39 #include "svga_shader.h"
  40
  41
  42 struct rs_queue {
  43    unsigned rs_count;
  44    SVGA3dRenderState rs[SVGA3D_RS_MAX];
  45 };
  46
  47
  48 #define EMIT_RS(svga, value, token, fail)                       \
  49 do {                                                            \
  50    STATIC_ASSERT(SVGA3D_RS_##token < ARRAY_SIZE(svga->state.hw_draw.rs)); \
  51    if (svga->state.hw_draw.rs[SVGA3D_RS_##token] != value) {    \
  52       svga_queue_rs( &queue, SVGA3D_RS_##token, value );        \
  53       svga->state.hw_draw.rs[SVGA3D_RS_##token] = value;        \
  54    }                                                            \
  55 } while (0)
  56
  57 #define EMIT_RS_FLOAT(svga, fvalue, token, fail)                \
  58 do {                                                            \
  59    unsigned value = fui(fvalue);                                \
  60    STATIC_ASSERT(SVGA3D_RS_##token < ARRAY_SIZE(svga->state.hw_draw.rs)); \
  61    if (svga->state.hw_draw.rs[SVGA3D_RS_##token] != value) {    \
  62       svga_queue_rs( &queue, SVGA3D_RS_##token, value );        \
  63       svga->state.hw_draw.rs[SVGA3D_RS_##token] = value;        \
  64    }                                                            \
  65 } while (0)
  66
  67
  68 static inline void
  69 svga_queue_rs( struct rs_queue *q,
  70                unsigned rss,
  71                unsigned value )
  72 {
  73    q->rs[q->rs_count].state = rss;
  74    q->rs[q->rs_count].uintValue = value;
  75    q->rs_count++;
  76 }
  77
  78
  79 /* Compare old and new render states and emit differences between them
  80  * to hardware.  Simplest implementation would be to emit the whole of
  81  * the "to" state.
  82  */
  83 static enum pipe_error
  84 emit_rss_vgpu9(struct svga_context *svga, unsigned dirty)
  85 {
  86    struct svga_screen *screen = svga_screen(svga->pipe.screen);
  87    struct rs_queue queue;
  88    float point_size_min;
  89
  90    queue.rs_count = 0;
  91
  92    if (dirty & (SVGA_NEW_BLEND | SVGA_NEW_BLEND_COLOR)) {
  93       const struct svga_blend_state *curr = svga->curr.blend;
  94
  95       EMIT_RS( svga, curr->rt[0].writemask, COLORWRITEENABLE, fail );
  96       EMIT_RS( svga, curr->rt[0].blend_enable, BLENDENABLE, fail );
  97
  98       if (curr->rt[0].blend_enable) {
  99          EMIT_RS( svga, curr->rt[0].srcblend, SRCBLEND, fail );
 100          EMIT_RS( svga, curr->rt[0].dstblend, DSTBLEND, fail );
 101          EMIT_RS( svga, curr->rt[0].blendeq, BLENDEQUATION, fail );
 102
 103          EMIT_RS( svga, curr->rt[0].separate_alpha_blend_enable,
 104                   SEPARATEALPHABLENDENABLE, fail );
 105
 106          if (curr->rt[0].separate_alpha_blend_enable) {
 107             EMIT_RS( svga, curr->rt[0].srcblend_alpha, SRCBLENDALPHA, fail );
 108             EMIT_RS( svga, curr->rt[0].dstblend_alpha, DSTBLENDALPHA, fail );
 109             EMIT_RS( svga, curr->rt[0].blendeq_alpha, BLENDEQUATIONALPHA, fail );
 110          }
 111       }
 112    }
 113
 114    if (dirty & SVGA_NEW_BLEND_COLOR) {
 115       uint32 color;
 116       uint32 r = float_to_ubyte(svga->curr.blend_color.color[0]);
 117       uint32 g = float_to_ubyte(svga->curr.blend_color.color[1]);
 118       uint32 b = float_to_ubyte(svga->curr.blend_color.color[2]);
 119       uint32 a = float_to_ubyte(svga->curr.blend_color.color[3]);
 120
 121       color = (a << 24) | (r << 16) | (g << 8) | b;
 122
 123       EMIT_RS( svga, color, BLENDCOLOR, fail );
 124    }
 125
 126    if (dirty & (SVGA_NEW_DEPTH_STENCIL_ALPHA | SVGA_NEW_RAST)) {
 127       const struct svga_depth_stencil_state *curr = svga->curr.depth;
 128       const struct svga_rasterizer_state *rast = svga->curr.rast;
 129
 130       if (!curr->stencil[0].enabled)
 131       {
 132          /* Stencil disabled
 133           */
 134          EMIT_RS( svga, FALSE, STENCILENABLE, fail );
 135          EMIT_RS( svga, FALSE, STENCILENABLE2SIDED, fail );
 136       }
 137       else if (curr->stencil[0].enabled && !curr->stencil[1].enabled)
 138       {
 139          /* Regular stencil
 140           */
 141          EMIT_RS( svga, TRUE, STENCILENABLE, fail );
 142          EMIT_RS( svga, FALSE, STENCILENABLE2SIDED, fail );
 143
 144          EMIT_RS( svga, curr->stencil[0].func,  STENCILFUNC, fail );
 145          EMIT_RS( svga, curr->stencil[0].fail,  STENCILFAIL, fail );
 146          EMIT_RS( svga, curr->stencil[0].zfail, STENCILZFAIL, fail );
 147          EMIT_RS( svga, curr->stencil[0].pass,  STENCILPASS, fail );
 148
 149          EMIT_RS( svga, curr->stencil_mask, STENCILMASK, fail );
 150          EMIT_RS( svga, curr->stencil_writemask, STENCILWRITEMASK, fail );
 151       }
 152       else
 153       {
 154          int cw, ccw;
 155
 156          /* Hardware frontwinding is always CW, so if ours is also CW,
 157           * then our definition of front face agrees with hardware.
 158           * Otherwise need to flip.
 159           */
 160          if (rast->templ.front_ccw) {
 161             ccw = 0;
 162             cw = 1;
 163          }
 164          else {
 165             ccw = 1;
 166             cw = 0;
 167          }
 168
 169          /* Twoside stencil
 170           */
 171          EMIT_RS( svga, TRUE, STENCILENABLE, fail );
 172          EMIT_RS( svga, TRUE, STENCILENABLE2SIDED, fail );
 173
 174          EMIT_RS( svga, curr->stencil[cw].func,  STENCILFUNC, fail );
 175          EMIT_RS( svga, curr->stencil[cw].fail,  STENCILFAIL, fail );
 176          EMIT_RS( svga, curr->stencil[cw].zfail, STENCILZFAIL, fail );
 177          EMIT_RS( svga, curr->stencil[cw].pass,  STENCILPASS, fail );
 178
 179          EMIT_RS( svga, curr->stencil[ccw].func,  CCWSTENCILFUNC, fail );
 180          EMIT_RS( svga, curr->stencil[ccw].fail,  CCWSTENCILFAIL, fail );
 181          EMIT_RS( svga, curr->stencil[ccw].zfail, CCWSTENCILZFAIL, fail );
 182          EMIT_RS( svga, curr->stencil[ccw].pass,  CCWSTENCILPASS, fail );
 183
 184          EMIT_RS( svga, curr->stencil_mask, STENCILMASK, fail );
 185          EMIT_RS( svga, curr->stencil_writemask, STENCILWRITEMASK, fail );
 186       }
 187
 188       EMIT_RS( svga, curr->zenable, ZENABLE, fail );
 189       if (curr->zenable) {
 190          EMIT_RS( svga, curr->zfunc, ZFUNC, fail );
 191          EMIT_RS( svga, curr->zwriteenable, ZWRITEENABLE, fail );
 192       }
 193
 194       EMIT_RS( svga, curr->alphatestenable, ALPHATESTENABLE, fail );
 195       if (curr->alphatestenable) {
 196          EMIT_RS( svga, curr->alphafunc, ALPHAFUNC, fail );
 197          EMIT_RS_FLOAT( svga, curr->alpharef, ALPHAREF, fail );
 198       }
 199    }
 200
 201    if (dirty & SVGA_NEW_STENCIL_REF) {
 202       EMIT_RS( svga, svga->curr.stencil_ref.ref_value[0], STENCILREF, fail );
 203    }
 204
 205    if (dirty & (SVGA_NEW_RAST | SVGA_NEW_NEED_PIPELINE))
 206    {
 207       const struct svga_rasterizer_state *curr = svga->curr.rast;
 208       unsigned cullmode = curr->cullmode;
 209
 210       /* Shademode: still need to rearrange index list to move
 211        * flat-shading PV first vertex.
 212        */
 213       EMIT_RS( svga, curr->shademode, SHADEMODE, fail );
 214
 215       /* Don't do culling while the software pipeline is active.  It
 216        * does it for us, and additionally introduces potentially
 217        * back-facing triangles.
 218        */
 219       if (svga->state.sw.need_pipeline)
 220          cullmode = SVGA3D_FACE_NONE;
 221
 222       point_size_min = util_get_min_point_size(&curr->templ);
 223
 224       EMIT_RS( svga, cullmode, CULLMODE, fail );
 225       EMIT_RS( svga, curr->scissortestenable, SCISSORTESTENABLE, fail );
 226       EMIT_RS( svga, curr->multisampleantialias, MULTISAMPLEANTIALIAS, fail );
 227       EMIT_RS( svga, curr->lastpixel, LASTPIXEL, fail );
 228       EMIT_RS_FLOAT( svga, curr->pointsize, POINTSIZE, fail );
 229       EMIT_RS_FLOAT( svga, point_size_min, POINTSIZEMIN, fail );
 230       EMIT_RS_FLOAT( svga, screen->maxPointSize, POINTSIZEMAX, fail );
 231       EMIT_RS( svga, curr->pointsprite, POINTSPRITEENABLE, fail);
 232
 233       /* Emit line state, when the device understands it */
 234       if (screen->haveLineStipple)
 235          EMIT_RS( svga, curr->linepattern, LINEPATTERN, fail );
 236       if (screen->haveLineSmooth)
 237          EMIT_RS( svga, curr->antialiasedlineenable, ANTIALIASEDLINEENABLE, fail );
 238       if (screen->maxLineWidth > 1.0F)
 239          EMIT_RS_FLOAT( svga, curr->linewidth, LINEWIDTH, fail );
 240    }
 241
 242    if (dirty & (SVGA_NEW_RAST | SVGA_NEW_FRAME_BUFFER | SVGA_NEW_NEED_PIPELINE))
 243    {
 244       const struct svga_rasterizer_state *curr = svga->curr.rast;
 245       float slope = 0.0;
 246       float bias  = 0.0;
 247
 248       /* Need to modify depth bias according to bound depthbuffer
 249        * format.  Don't do hardware depthbias while the software
 250        * pipeline is active.
 251        */
 252       if (!svga->state.sw.need_pipeline &&
 253           svga->curr.framebuffer.zsbuf)
 254       {
 255          slope = curr->slopescaledepthbias;
 256          bias  = svga->curr.depthscale * curr->depthbias;
 257       }
 258
 259       EMIT_RS_FLOAT( svga, slope, SLOPESCALEDEPTHBIAS, fail );
 260       EMIT_RS_FLOAT( svga, bias, DEPTHBIAS, fail );
 261    }
 262
 263    if (dirty & SVGA_NEW_FRAME_BUFFER) {
 264       /* XXX: we only look at the first color buffer's sRGB state */
 265       float gamma = 1.0f;
 266       if (svga->curr.framebuffer.cbufs[0] &&
 267           util_format_is_srgb(svga->curr.framebuffer.cbufs[0]->format)) {
 268          gamma = 2.2f;
 269       }
 270       EMIT_RS_FLOAT(svga, gamma, OUTPUTGAMMA, fail);
 271    }
 272
 273    if (dirty & SVGA_NEW_RAST) {
 274       /* bitmask of the enabled clip planes */
 275       unsigned enabled = svga->curr.rast->templ.clip_plane_enable;
 276       EMIT_RS( svga, enabled, CLIPPLANEENABLE, fail );
 277    }
 278
 279    if (queue.rs_count) {
 280       SVGA3dRenderState *rs;
 281
 282       if (SVGA3D_BeginSetRenderState( svga->swc,
 283                                       &rs,
 284                                       queue.rs_count ) != PIPE_OK)
 285          goto fail;
 286
 287       memcpy( rs,
 288               queue.rs,
 289               queue.rs_count * sizeof queue.rs[0]);
 290
 291       SVGA_FIFOCommitAll( svga->swc );
 292    }
 293
 294    return PIPE_OK;
 295
 296 fail:
 297    /* XXX: need to poison cached hardware state on failure to ensure
 298     * dirty state gets re-emitted.  Fix this by re-instating partial
 299     * FIFOCommit command and only updating cached hw state once the
 300     * initial allocation has succeeded.
 301     */
 302    memset(svga->state.hw_draw.rs, 0xcd, sizeof(svga->state.hw_draw.rs));
 303
 304    return PIPE_ERROR_OUT_OF_MEMORY;
 305 }
 306
 307 /** Returns a non-culling rasterizer state object to be used with
 308  *  point sprite.
 309  */
 310 static struct svga_rasterizer_state *
 311 get_no_cull_rasterizer_state(struct svga_context *svga)
 312 {
 313    const struct svga_rasterizer_state *r = svga->curr.rast;
 314    unsigned int aa_point = r->templ.point_smooth;
 315
 316    if (!svga->rasterizer_no_cull[aa_point]) {
 317       struct pipe_rasterizer_state rast;
 318
 319       memset(&rast, 0, sizeof(rast));
 320       rast.flatshade = 1;
 321       rast.front_ccw = 1;
 322       rast.point_smooth = r->templ.point_smooth;
 323
 324       /* All rasterizer states have the same half_pixel_center,
 325        * bottom_edge_rule and clip_halfz values since they are
 326        * constant for a context. If we ever implement
 327        * GL_ARB_clip_control, the clip_halfz field would have to be observed.
 328        */
 329       rast.half_pixel_center = r->templ.half_pixel_center;
 330       rast.bottom_edge_rule = r->templ.bottom_edge_rule;
 331       rast.clip_halfz = r->templ.clip_halfz;
 332
 333       svga->rasterizer_no_cull[aa_point] =
 334                svga->pipe.create_rasterizer_state(&svga->pipe, &rast);
 335    }
 336    return svga->rasterizer_no_cull[aa_point];
 337 }
 338
 339 static enum pipe_error
 340 emit_rss_vgpu10(struct svga_context *svga, unsigned dirty)
 341 {
 342    enum pipe_error ret = PIPE_OK;
 343
 344    svga_hwtnl_flush_retry(svga);
 345
 346    if (dirty & (SVGA_NEW_BLEND | SVGA_NEW_BLEND_COLOR)) {
 347       const struct svga_blend_state *curr;
 348       float blend_factor[4];
 349
 350       if (svga_has_any_integer_cbufs(svga)) {
 351          /* Blending is not supported in integer-valued render targets. */
 352          curr = svga->noop_blend;
 353          blend_factor[0] =
 354          blend_factor[1] =
 355          blend_factor[2] =
 356          blend_factor[3] = 0;
 357       }
 358       else {
 359          curr = svga->curr.blend;
 360
 361          if (curr->blend_color_alpha) {
 362             blend_factor[0] =
 363             blend_factor[1] =
 364             blend_factor[2] =
 365             blend_factor[3] = svga->curr.blend_color.color[3];
 366          }
 367          else {
 368             blend_factor[0] = svga->curr.blend_color.color[0];
 369             blend_factor[1] = svga->curr.blend_color.color[1];
 370             blend_factor[2] = svga->curr.blend_color.color[2];
 371             blend_factor[3] = svga->curr.blend_color.color[3];
 372          }
 373       }
 374
 375       /* Set/bind the blend state object */
 376       if (svga->state.hw_draw.blend_id != curr->id ||
 377           svga->state.hw_draw.blend_factor[0] != blend_factor[0] ||
 378           svga->state.hw_draw.blend_factor[1] != blend_factor[1] ||
 379           svga->state.hw_draw.blend_factor[2] != blend_factor[2] ||
 380           svga->state.hw_draw.blend_factor[3] != blend_factor[3] ||
 381           svga->state.hw_draw.blend_sample_mask != svga->curr.sample_mask) {
 382          ret = SVGA3D_vgpu10_SetBlendState(svga->swc, curr->id,
 383                                            blend_factor,
 384                                            svga->curr.sample_mask);
 385          if (ret != PIPE_OK)
 386             return ret;
 387
 388          svga->state.hw_draw.blend_id = curr->id;
 389          svga->state.hw_draw.blend_factor[0] = blend_factor[0];
 390          svga->state.hw_draw.blend_factor[1] = blend_factor[1];
 391          svga->state.hw_draw.blend_factor[2] = blend_factor[2];
 392          svga->state.hw_draw.blend_factor[3] = blend_factor[3];
 393          svga->state.hw_draw.blend_sample_mask = svga->curr.sample_mask;
 394       }
 395    }
 396
 397    if (dirty & (SVGA_NEW_DEPTH_STENCIL_ALPHA | SVGA_NEW_STENCIL_REF)) {
 398       const struct svga_depth_stencil_state *curr = svga->curr.depth;
 399       unsigned curr_ref = svga->curr.stencil_ref.ref_value[0];
 400
 401       if (curr->id != svga->state.hw_draw.depth_stencil_id ||
 402           curr_ref != svga->state.hw_draw.stencil_ref) {
 403          /* Set/bind the depth/stencil state object */
 404          ret = SVGA3D_vgpu10_SetDepthStencilState(svga->swc, curr->id,
 405                                                   curr_ref);
 406          if (ret != PIPE_OK)
 407             return ret;
 408
 409          svga->state.hw_draw.depth_stencil_id = curr->id;
 410          svga->state.hw_draw.stencil_ref = curr_ref;
 411       }
 412    }
 413
 414    if (dirty & (SVGA_NEW_REDUCED_PRIMITIVE | SVGA_NEW_RAST)) {
 415       const struct svga_rasterizer_state *rast;
 416
 417       if (svga->curr.reduced_prim == PIPE_PRIM_POINTS &&
 418           svga->curr.gs && svga->curr.gs->wide_point) {
 419
 420          /* If we are drawing a point sprite, we will need to
 421           * bind a non-culling rasterizer state object
 422           */
 423          rast = get_no_cull_rasterizer_state(svga);
 424       }
 425       else {
 426          rast = svga->curr.rast;
 427       }
 428
 429       if (svga->state.hw_draw.rasterizer_id != rast->id) {
 430          /* Set/bind the rasterizer state object */
 431          ret = SVGA3D_vgpu10_SetRasterizerState(svga->swc, rast->id);
 432          if (ret != PIPE_OK)
 433             return ret;
 434          svga->state.hw_draw.rasterizer_id = rast->id;
 435       }
 436    }
 437    return PIPE_OK;
 438 }
 439
 440
 441 static enum pipe_error
 442 emit_rss(struct svga_context *svga, unsigned dirty)
 443 {
 444    if (svga_have_vgpu10(svga)) {
 445       return emit_rss_vgpu10(svga, dirty);
 446    }
 447    else {
 448       return emit_rss_vgpu9(svga, dirty);
 449    }
 450 }
 451
 452
 453 struct svga_tracked_state svga_hw_rss =
 454 {
 455    "hw rss state",
 456
 457    (SVGA_NEW_BLEND |
 458     SVGA_NEW_BLEND_COLOR |
 459     SVGA_NEW_DEPTH_STENCIL_ALPHA |
 460     SVGA_NEW_STENCIL_REF |
 461     SVGA_NEW_RAST |
 462     SVGA_NEW_FRAME_BUFFER |
 463     SVGA_NEW_NEED_PIPELINE |
 464     SVGA_NEW_REDUCED_PRIMITIVE),
 465
 466    emit_rss
 467 };