src/gallium/drivers/svga/svga_pipe_blend.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 "util/u_inlines.h"
  27 #include "pipe/p_defines.h"
  28 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_bitmask.h"
  31
  32 #include "svga_context.h"
  33 #include "svga_hw_reg.h"
  34 #include "svga_cmd.h"
  35
  36
  37 static inline unsigned
  38 svga_translate_blend_factor(const struct svga_context *svga, unsigned factor)
  39 {
  40    /* Note: there is no SVGA3D_BLENDOP_[INV]BLENDFACTORALPHA so
  41     * we can't translate PIPE_BLENDFACTOR_[INV_]CONST_ALPHA properly.
  42     */
  43    switch (factor) {
  44    case PIPE_BLENDFACTOR_ZERO:            return SVGA3D_BLENDOP_ZERO;
  45    case PIPE_BLENDFACTOR_SRC_ALPHA:       return SVGA3D_BLENDOP_SRCALPHA;
  46    case PIPE_BLENDFACTOR_ONE:             return SVGA3D_BLENDOP_ONE;
  47    case PIPE_BLENDFACTOR_SRC_COLOR:       return SVGA3D_BLENDOP_SRCCOLOR;
  48    case PIPE_BLENDFACTOR_INV_SRC_COLOR:   return SVGA3D_BLENDOP_INVSRCCOLOR;
  49    case PIPE_BLENDFACTOR_DST_COLOR:       return SVGA3D_BLENDOP_DESTCOLOR;
  50    case PIPE_BLENDFACTOR_INV_DST_COLOR:   return SVGA3D_BLENDOP_INVDESTCOLOR;
  51    case PIPE_BLENDFACTOR_INV_SRC_ALPHA:   return SVGA3D_BLENDOP_INVSRCALPHA;
  52    case PIPE_BLENDFACTOR_DST_ALPHA:       return SVGA3D_BLENDOP_DESTALPHA;
  53    case PIPE_BLENDFACTOR_INV_DST_ALPHA:   return SVGA3D_BLENDOP_INVDESTALPHA;
  54    case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: return SVGA3D_BLENDOP_SRCALPHASAT;
  55    case PIPE_BLENDFACTOR_CONST_COLOR:     return SVGA3D_BLENDOP_BLENDFACTOR;
  56    case PIPE_BLENDFACTOR_INV_CONST_COLOR: return SVGA3D_BLENDOP_INVBLENDFACTOR;
  57    case PIPE_BLENDFACTOR_CONST_ALPHA:
  58       if (svga_have_vgpu10(svga))
  59          return SVGA3D_BLENDOP_BLENDFACTORALPHA;
  60       else
  61          return SVGA3D_BLENDOP_BLENDFACTOR; /* as close as we can get */
  62    case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
  63       if (svga_have_vgpu10(svga))
  64          return SVGA3D_BLENDOP_INVBLENDFACTORALPHA;
  65       else
  66          return SVGA3D_BLENDOP_INVBLENDFACTOR; /* as close as we can get */
  67    case PIPE_BLENDFACTOR_SRC1_COLOR:      return SVGA3D_BLENDOP_SRC1COLOR;
  68    case PIPE_BLENDFACTOR_INV_SRC1_COLOR:  return SVGA3D_BLENDOP_INVSRC1COLOR;
  69    case PIPE_BLENDFACTOR_SRC1_ALPHA:      return SVGA3D_BLENDOP_SRC1ALPHA;
  70    case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:  return SVGA3D_BLENDOP_INVSRC1ALPHA;
  71    case 0:                                return SVGA3D_BLENDOP_ONE;
  72    default:
  73       assert(0);
  74       return SVGA3D_BLENDOP_ZERO;
  75    }
  76 }
  77
  78 static inline unsigned
  79 svga_translate_blend_func(unsigned mode)
  80 {
  81    switch (mode) {
  82    case PIPE_BLEND_ADD:              return SVGA3D_BLENDEQ_ADD;
  83    case PIPE_BLEND_SUBTRACT:         return SVGA3D_BLENDEQ_SUBTRACT;
  84    case PIPE_BLEND_REVERSE_SUBTRACT: return SVGA3D_BLENDEQ_REVSUBTRACT;
  85    case PIPE_BLEND_MIN:              return SVGA3D_BLENDEQ_MINIMUM;
  86    case PIPE_BLEND_MAX:              return SVGA3D_BLENDEQ_MAXIMUM;
  87    default:
  88       assert(0);
  89       return SVGA3D_BLENDEQ_ADD;
  90    }
  91 }
  92
  93
  94 /**
  95  * Translate gallium logicop mode to SVGA3D logicop mode.
  96  */
  97 static int
  98 translate_logicop(enum pipe_logicop op)
  99 {
 100    switch (op) {
 101    case PIPE_LOGICOP_CLEAR:
 102       return SVGA3D_DX11_LOGICOP_CLEAR;
 103    case PIPE_LOGICOP_NOR:
 104       return SVGA3D_DX11_LOGICOP_NOR;
 105    case PIPE_LOGICOP_AND_INVERTED:
 106       return SVGA3D_DX11_LOGICOP_AND_INVERTED;
 107    case PIPE_LOGICOP_COPY_INVERTED:
 108       return SVGA3D_DX11_LOGICOP_COPY_INVERTED;
 109    case PIPE_LOGICOP_AND_REVERSE:
 110       return SVGA3D_DX11_LOGICOP_AND_REVERSE;
 111    case PIPE_LOGICOP_INVERT:
 112       return SVGA3D_DX11_LOGICOP_INVERT;
 113    case PIPE_LOGICOP_XOR:
 114       return SVGA3D_DX11_LOGICOP_XOR;
 115    case PIPE_LOGICOP_NAND:
 116       return SVGA3D_DX11_LOGICOP_NAND;
 117    case PIPE_LOGICOP_AND:
 118       return SVGA3D_DX11_LOGICOP_AND;
 119    case PIPE_LOGICOP_EQUIV:
 120       return SVGA3D_DX11_LOGICOP_EQUIV;
 121    case PIPE_LOGICOP_NOOP:
 122       return SVGA3D_DX11_LOGICOP_NOOP;
 123    case PIPE_LOGICOP_OR_INVERTED:
 124       return SVGA3D_DX11_LOGICOP_OR_INVERTED;
 125    case PIPE_LOGICOP_COPY:
 126       return SVGA3D_DX11_LOGICOP_COPY;
 127    case PIPE_LOGICOP_OR_REVERSE:
 128       return SVGA3D_DX11_LOGICOP_OR_REVERSE;
 129    case PIPE_LOGICOP_OR:
 130       return SVGA3D_DX11_LOGICOP_OR;
 131    case PIPE_LOGICOP_SET:
 132       return SVGA3D_DX11_LOGICOP_SET;
 133    default:
 134       return SVGA3D_DX11_LOGICOP_COPY;
 135    }
 136 };
 137
 138
 139 /**
 140  * Define a vgpu10 blend state object for the given
 141  * svga blend state.
 142  */
 143 static void
 144 define_blend_state_object(struct svga_context *svga,
 145                           struct svga_blend_state *bs)
 146 {
 147    SVGA3dDXBlendStatePerRT perRT[SVGA3D_MAX_RENDER_TARGETS];
 148    int i;
 149
 150    assert(svga_have_vgpu10(svga));
 151
 152    bs->id = util_bitmask_add(svga->blend_object_id_bm);
 153
 154    for (i = 0; i < SVGA3D_DX_MAX_RENDER_TARGETS; i++) {
 155       perRT[i].blendEnable = bs->rt[i].blend_enable;
 156       perRT[i].srcBlend = bs->rt[i].srcblend;
 157       perRT[i].destBlend = bs->rt[i].dstblend;
 158       perRT[i].blendOp = bs->rt[i].blendeq;
 159       perRT[i].srcBlendAlpha = bs->rt[i].srcblend_alpha;
 160       perRT[i].destBlendAlpha = bs->rt[i].dstblend_alpha;
 161       perRT[i].blendOpAlpha = bs->rt[i].blendeq_alpha;
 162       perRT[i].renderTargetWriteMask = bs->rt[i].writemask;
 163       perRT[i].logicOpEnable = bs->logicop_enabled;
 164       perRT[i].logicOp = bs->logicop_mode;
 165    }
 166
 167    SVGA_RETRY(svga, SVGA3D_vgpu10_DefineBlendState(svga->swc,
 168                                                    bs->id,
 169                                                    bs->alpha_to_coverage,
 170                                                    bs->independent_blend_enable,
 171                                                    perRT));
 172 }
 173
 174
 175 /**
 176  * If SVGA3D_DEVCAP_LOGIC_BLENDOPS is false, we can't directly implement
 177  * GL's logicops.  But we can emulate some of them.  We set up the blending
 178  * state for that here.
 179  */
 180 static void
 181 emulate_logicop(struct svga_context *svga,
 182                 unsigned logicop_func,
 183                 struct svga_blend_state *blend,
 184                 unsigned buffer)
 185 {
 186    switch (logicop_func) {
 187    case PIPE_LOGICOP_XOR:
 188    case PIPE_LOGICOP_INVERT:
 189       blend->need_white_fragments = TRUE;
 190       blend->rt[buffer].blend_enable = TRUE;
 191       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_ONE;
 192       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_ONE;
 193       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_SUBTRACT;
 194       break;
 195    case PIPE_LOGICOP_CLEAR:
 196       blend->rt[buffer].blend_enable = TRUE;
 197       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_ZERO;
 198       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_ZERO;
 199       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 200       break;
 201    case PIPE_LOGICOP_COPY:
 202       blend->rt[buffer].blend_enable = FALSE;
 203       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_ONE;
 204       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_ZERO;
 205       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_ADD;
 206       break;
 207    case PIPE_LOGICOP_COPY_INVERTED:
 208       blend->rt[buffer].blend_enable   = TRUE;
 209       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 210       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_ZERO;
 211       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_ADD;
 212       break;
 213    case PIPE_LOGICOP_NOOP:
 214       blend->rt[buffer].blend_enable   = TRUE;
 215       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_ZERO;
 216       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 217       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_ADD;
 218       break;
 219    case PIPE_LOGICOP_SET:
 220       blend->rt[buffer].blend_enable = TRUE;
 221       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_ONE;
 222       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_ONE;
 223       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 224       break;
 225    case PIPE_LOGICOP_AND:
 226       /* Approximate with minimum - works for the 0 & anything case: */
 227       blend->rt[buffer].blend_enable = TRUE;
 228       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 229       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 230       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 231       break;
 232    case PIPE_LOGICOP_AND_REVERSE:
 233       blend->rt[buffer].blend_enable = TRUE;
 234       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 235       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 236       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 237       break;
 238    case PIPE_LOGICOP_AND_INVERTED:
 239       blend->rt[buffer].blend_enable = TRUE;
 240       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 241       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 242       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 243       break;
 244    case PIPE_LOGICOP_OR:
 245       /* Approximate with maximum - works for the 1 | anything case: */
 246       blend->rt[buffer].blend_enable = TRUE;
 247       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 248       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 249       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 250       break;
 251    case PIPE_LOGICOP_OR_REVERSE:
 252       blend->rt[buffer].blend_enable = TRUE;
 253       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 254       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 255       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 256       break;
 257    case PIPE_LOGICOP_OR_INVERTED:
 258       blend->rt[buffer].blend_enable = TRUE;
 259       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 260       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 261       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 262       break;
 263    case PIPE_LOGICOP_NAND:
 264    case PIPE_LOGICOP_NOR:
 265    case PIPE_LOGICOP_EQUIV:
 266       /* Fill these in with plausible values */
 267       blend->rt[buffer].blend_enable = FALSE;
 268       blend->rt[buffer].srcblend       = SVGA3D_BLENDOP_ONE;
 269       blend->rt[buffer].dstblend       = SVGA3D_BLENDOP_ZERO;
 270       blend->rt[buffer].blendeq        = SVGA3D_BLENDEQ_ADD;
 271       break;
 272    default:
 273       assert(0);
 274       break;
 275    }
 276    blend->rt[buffer].srcblend_alpha = blend->rt[buffer].srcblend;
 277    blend->rt[buffer].dstblend_alpha = blend->rt[buffer].dstblend;
 278    blend->rt[buffer].blendeq_alpha = blend->rt[buffer].blendeq;
 279
 280    if (logicop_func == PIPE_LOGICOP_XOR) {
 281       pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 282                          "XOR logicop mode has limited support");
 283    }
 284    else if (logicop_func != PIPE_LOGICOP_COPY) {
 285       pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 286                          "general logicops are not supported");
 287    }
 288 }
 289
 290
 291
 292 static void *
 293 svga_create_blend_state(struct pipe_context *pipe,
 294                         const struct pipe_blend_state *templ)
 295 {
 296    struct svga_context *svga = svga_context(pipe);
 297    struct svga_screen *ss = svga_screen(pipe->screen);
 298    struct svga_blend_state *blend = CALLOC_STRUCT( svga_blend_state );
 299    unsigned i;
 300
 301    if (!blend)
 302       return NULL;
 303
 304    /* Find index of first target with blending enabled.  If no blending is
 305     * enabled at all, first_enabled will be zero.
 306     */
 307    unsigned first_enabled = 0;
 308    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 309       if (templ->rt[i].blend_enable) {
 310          first_enabled = i;
 311          break;
 312       }
 313    }
 314
 315    /* Fill in the per-rendertarget blend state.  We currently only
 316     * support independent blend enable and colormask per render target.
 317     */
 318    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 319       /* No way to set this in SVGA3D, and no way to correctly implement it on
 320        * top of D3D9 API.  Instead we try to simulate with various blend modes.
 321        */
 322       if (templ->logicop_enable) {
 323          if (ss->haveBlendLogicops) {
 324             blend->logicop_enabled = TRUE;
 325             blend->logicop_mode = translate_logicop(templ->logicop_func);
 326             blend->rt[i].blendeq = SVGA3D_BLENDEQ_ADD;
 327             blend->rt[i].blendeq_alpha = SVGA3D_BLENDEQ_ADD;
 328             blend->rt[i].srcblend = SVGA3D_BLENDOP_ZERO;
 329             blend->rt[i].dstblend = SVGA3D_BLENDOP_ZERO;
 330             blend->rt[i].srcblend_alpha = SVGA3D_BLENDOP_ZERO;
 331             blend->rt[i].dstblend_alpha = SVGA3D_BLENDOP_ZERO;
 332          }
 333          else {
 334             emulate_logicop(svga, templ->logicop_func, blend, i);
 335          }
 336       }
 337       else {
 338          /* Note: per-target blend terms are only supported for sm4_1
 339           * device. For vgpu10 device, the blending terms must be identical
 340           * for all targets (this is why we need the first_enabled index).
 341           */
 342          const unsigned j =
 343             svga_have_sm4_1(svga) && templ->independent_blend_enable
 344             ? i : first_enabled;
 345          if (templ->independent_blend_enable || templ->rt[j].blend_enable) {
 346             blend->rt[i].srcblend =
 347                svga_translate_blend_factor(svga, templ->rt[j].rgb_src_factor);
 348             blend->rt[i].dstblend =
 349                svga_translate_blend_factor(svga, templ->rt[j].rgb_dst_factor);
 350             blend->rt[i].blendeq =
 351                svga_translate_blend_func(templ->rt[j].rgb_func);
 352             blend->rt[i].srcblend_alpha =
 353                svga_translate_blend_factor(svga, templ->rt[j].alpha_src_factor);
 354             blend->rt[i].dstblend_alpha =
 355                svga_translate_blend_factor(svga, templ->rt[j].alpha_dst_factor);
 356             blend->rt[i].blendeq_alpha =
 357                svga_translate_blend_func(templ->rt[j].alpha_func);
 358
 359             if (blend->rt[i].srcblend_alpha != blend->rt[i].srcblend ||
 360                 blend->rt[i].dstblend_alpha != blend->rt[i].dstblend ||
 361                 blend->rt[i].blendeq_alpha  != blend->rt[i].blendeq) {
 362                blend->rt[i].separate_alpha_blend_enable = TRUE;
 363             }
 364          }
 365          else {
 366             /* disabled - default blend terms */
 367             blend->rt[i].srcblend = SVGA3D_BLENDOP_ONE;
 368             blend->rt[i].dstblend = SVGA3D_BLENDOP_ZERO;
 369             blend->rt[i].blendeq = SVGA3D_BLENDEQ_ADD;
 370             blend->rt[i].srcblend_alpha = SVGA3D_BLENDOP_ONE;
 371             blend->rt[i].dstblend_alpha = SVGA3D_BLENDOP_ZERO;
 372             blend->rt[i].blendeq_alpha = SVGA3D_BLENDEQ_ADD;
 373          }
 374
 375          if (templ->independent_blend_enable) {
 376             blend->rt[i].blend_enable = templ->rt[i].blend_enable;
 377          }
 378          else {
 379             blend->rt[i].blend_enable = templ->rt[0].blend_enable;
 380          }
 381       }
 382
 383       /* Some GL blend modes are not supported by the VGPU9 device (there's
 384        * no equivalent of PIPE_BLENDFACTOR_[INV_]CONST_ALPHA).
 385        * When we set this flag, we copy the constant blend alpha value
 386        * to the R, G, B components.
 387        * This works as long as the src/dst RGB blend factors doesn't use
 388        * PIPE_BLENDFACTOR_CONST_COLOR and PIPE_BLENDFACTOR_CONST_ALPHA
 389        * at the same time.  There's no work-around for that.
 390        */
 391       if (!svga_have_vgpu10(svga)) {
 392          if (templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 393              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 394              templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA ||
 395              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA) {
 396             blend->blend_color_alpha = TRUE;
 397          }
 398       }
 399
 400       if (templ->independent_blend_enable) {
 401          blend->rt[i].writemask = templ->rt[i].colormask;
 402       }
 403       else {
 404          blend->rt[i].writemask = templ->rt[0].colormask;
 405       }
 406    }
 407
 408    blend->independent_blend_enable = templ->independent_blend_enable;
 409
 410    blend->alpha_to_coverage = templ->alpha_to_coverage;
 411    blend->alpha_to_one = templ->alpha_to_one;
 412
 413    if (svga_have_vgpu10(svga)) {
 414       define_blend_state_object(svga, blend);
 415    }
 416
 417    svga->hud.num_blend_objects++;
 418    SVGA_STATS_COUNT_INC(svga_screen(svga->pipe.screen)->sws,
 419                         SVGA_STATS_COUNT_BLENDSTATE);
 420
 421    return blend;
 422 }
 423
 424
 425 static void svga_bind_blend_state(struct pipe_context *pipe,
 426                                   void *blend)
 427 {
 428    struct svga_context *svga = svga_context(pipe);
 429
 430    svga->curr.blend = (struct svga_blend_state*)blend;
 431    svga->dirty |= SVGA_NEW_BLEND;
 432 }
 433
 434 static void svga_delete_blend_state(struct pipe_context *pipe,
 435                                     void *blend)
 436 {
 437    struct svga_context *svga = svga_context(pipe);
 438    struct svga_blend_state *bs =
 439       (struct svga_blend_state *) blend;
 440
 441    if (svga_have_vgpu10(svga) && bs->id != SVGA3D_INVALID_ID) {
 442       SVGA_RETRY(svga, SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id));
 443
 444       if (bs->id == svga->state.hw_draw.blend_id)
 445          svga->state.hw_draw.blend_id = SVGA3D_INVALID_ID;
 446
 447       util_bitmask_clear(svga->blend_object_id_bm, bs->id);
 448       bs->id = SVGA3D_INVALID_ID;
 449    }
 450
 451    FREE(blend);
 452    svga->hud.num_blend_objects--;
 453 }
 454
 455 static void svga_set_blend_color( struct pipe_context *pipe,
 456                                   const struct pipe_blend_color *blend_color )
 457 {
 458    struct svga_context *svga = svga_context(pipe);
 459
 460    svga->curr.blend_color = *blend_color;
 461
 462    svga->dirty |= SVGA_NEW_BLEND_COLOR;
 463 }
 464
 465
 466 void svga_init_blend_functions( struct svga_context *svga )
 467 {
 468    svga->pipe.create_blend_state = svga_create_blend_state;
 469    svga->pipe.bind_blend_state = svga_bind_blend_state;
 470    svga->pipe.delete_blend_state = svga_delete_blend_state;
 471
 472    svga->pipe.set_blend_color = svga_set_blend_color;
 473 }