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  * Define a vgpu10 blend state object for the given
  96  * svga blend state.
  97  */
  98 static void
  99 define_blend_state_object(struct svga_context *svga,
 100                           struct svga_blend_state *bs)
 101 {
 102    SVGA3dDXBlendStatePerRT perRT[SVGA3D_MAX_RENDER_TARGETS];
 103    unsigned try;
 104    int i;
 105
 106    assert(svga_have_vgpu10(svga));
 107
 108    bs->id = util_bitmask_add(svga->blend_object_id_bm);
 109
 110    for (i = 0; i < SVGA3D_DX_MAX_RENDER_TARGETS; i++) {
 111       perRT[i].blendEnable = bs->rt[i].blend_enable;
 112       perRT[i].srcBlend = bs->rt[i].srcblend;
 113       perRT[i].destBlend = bs->rt[i].dstblend;
 114       perRT[i].blendOp = bs->rt[i].blendeq;
 115       perRT[i].srcBlendAlpha = bs->rt[i].srcblend_alpha;
 116       perRT[i].destBlendAlpha = bs->rt[i].dstblend_alpha;
 117       perRT[i].blendOpAlpha = bs->rt[i].blendeq_alpha;
 118       perRT[i].renderTargetWriteMask = bs->rt[i].writemask;
 119       perRT[i].logicOpEnable = 0;
 120       perRT[i].logicOp = SVGA3D_LOGICOP_COPY;
 121       assert(perRT[i].srcBlend == perRT[0].srcBlend);
 122    }
 123
 124    /* Loop in case command buffer is full and we need to flush and retry */
 125    for (try = 0; try < 2; try++) {
 126       enum pipe_error ret;
 127
 128       ret = SVGA3D_vgpu10_DefineBlendState(svga->swc,
 129                                            bs->id,
 130                                            bs->alpha_to_coverage,
 131                                            bs->independent_blend_enable,
 132                                            perRT);
 133       if (ret == PIPE_OK)
 134          return;
 135       svga_context_flush(svga, NULL);
 136    }
 137 }
 138
 139
 140 static void *
 141 svga_create_blend_state(struct pipe_context *pipe,
 142                         const struct pipe_blend_state *templ)
 143 {
 144    struct svga_context *svga = svga_context(pipe);
 145    struct svga_blend_state *blend = CALLOC_STRUCT( svga_blend_state );
 146    unsigned i;
 147
 148    if (!blend)
 149       return NULL;
 150
 151    /* Fill in the per-rendertarget blend state.  We currently only
 152     * support independent blend enable and colormask per render target.
 153     */
 154    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 155       /* No way to set this in SVGA3D, and no way to correctly implement it on
 156        * top of D3D9 API.  Instead we try to simulate with various blend modes.
 157        */
 158       if (templ->logicop_enable) {
 159          switch (templ->logicop_func) {
 160          case PIPE_LOGICOP_XOR:
 161          case PIPE_LOGICOP_INVERT:
 162             blend->need_white_fragments = TRUE;
 163             blend->rt[i].blend_enable = TRUE;
 164             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 165             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 166             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_SUBTRACT;
 167             break;
 168          case PIPE_LOGICOP_CLEAR:
 169             blend->rt[i].blend_enable = TRUE;
 170             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 171             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 172             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 173             break;
 174          case PIPE_LOGICOP_COPY:
 175             blend->rt[i].blend_enable = FALSE;
 176             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 177             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 178             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 179             break;
 180          case PIPE_LOGICOP_COPY_INVERTED:
 181             blend->rt[i].blend_enable   = TRUE;
 182             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 183             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 184             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 185             break;
 186          case PIPE_LOGICOP_NOOP:
 187             blend->rt[i].blend_enable   = TRUE;
 188             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 189             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 190             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 191             break;
 192          case PIPE_LOGICOP_SET:
 193             blend->rt[i].blend_enable = TRUE;
 194             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 195             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 196             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 197             break;
 198          case PIPE_LOGICOP_AND:
 199             /* Approximate with minimum - works for the 0 & anything case: */
 200             blend->rt[i].blend_enable = TRUE;
 201             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 202             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 203             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 204             break;
 205          case PIPE_LOGICOP_AND_REVERSE:
 206             blend->rt[i].blend_enable = TRUE;
 207             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 208             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 209             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 210             break;
 211          case PIPE_LOGICOP_AND_INVERTED:
 212             blend->rt[i].blend_enable = TRUE;
 213             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 214             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 215             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 216             break;
 217          case PIPE_LOGICOP_OR:
 218             /* Approximate with maximum - works for the 1 | anything case: */
 219             blend->rt[i].blend_enable = TRUE;
 220             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 221             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 222             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 223             break;
 224          case PIPE_LOGICOP_OR_REVERSE:
 225             blend->rt[i].blend_enable = TRUE;
 226             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 227             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 228             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 229             break;
 230          case PIPE_LOGICOP_OR_INVERTED:
 231             blend->rt[i].blend_enable = TRUE;
 232             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 233             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 234             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 235             break;
 236          case PIPE_LOGICOP_NAND:
 237          case PIPE_LOGICOP_NOR:
 238          case PIPE_LOGICOP_EQUIV:
 239             /* Fill these in with plausible values */
 240             blend->rt[i].blend_enable = FALSE;
 241             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 242             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 243             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 244             break;
 245          default:
 246             assert(0);
 247             break;
 248          }
 249          blend->rt[i].srcblend_alpha = blend->rt[i].srcblend;
 250          blend->rt[i].dstblend_alpha = blend->rt[i].dstblend;
 251          blend->rt[i].blendeq_alpha = blend->rt[i].blendeq;
 252
 253          if (templ->logicop_func == PIPE_LOGICOP_XOR) {
 254             pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 255                                "XOR logicop mode has limited support");
 256          }
 257          else if (templ->logicop_func != PIPE_LOGICOP_COPY) {
 258             pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 259                                "general logicops are not supported");
 260          }
 261       }
 262       else {
 263          /* Note: the vgpu10 device does not yet support independent
 264           * blend terms per render target.  Target[0] always specifies the
 265           * blending terms.
 266           */
 267          if (templ->independent_blend_enable || templ->rt[0].blend_enable) {
 268             /* always use the 0th target's blending terms for now */
 269             blend->rt[i].srcblend =
 270                svga_translate_blend_factor(svga, templ->rt[0].rgb_src_factor);
 271             blend->rt[i].dstblend =
 272                svga_translate_blend_factor(svga, templ->rt[0].rgb_dst_factor);
 273             blend->rt[i].blendeq =
 274                svga_translate_blend_func(templ->rt[0].rgb_func);
 275             blend->rt[i].srcblend_alpha =
 276                svga_translate_blend_factor(svga, templ->rt[0].alpha_src_factor);
 277             blend->rt[i].dstblend_alpha =
 278                svga_translate_blend_factor(svga, templ->rt[0].alpha_dst_factor);
 279             blend->rt[i].blendeq_alpha =
 280                svga_translate_blend_func(templ->rt[0].alpha_func);
 281
 282             if (blend->rt[i].srcblend_alpha != blend->rt[i].srcblend ||
 283                 blend->rt[i].dstblend_alpha != blend->rt[i].dstblend ||
 284                 blend->rt[i].blendeq_alpha  != blend->rt[i].blendeq) {
 285                blend->rt[i].separate_alpha_blend_enable = TRUE;
 286             }
 287          }
 288          else {
 289             /* disabled - default blend terms */
 290             blend->rt[i].srcblend = SVGA3D_BLENDOP_ONE;
 291             blend->rt[i].dstblend = SVGA3D_BLENDOP_ZERO;
 292             blend->rt[i].blendeq = SVGA3D_BLENDEQ_ADD;
 293             blend->rt[i].srcblend_alpha = SVGA3D_BLENDOP_ONE;
 294             blend->rt[i].dstblend_alpha = SVGA3D_BLENDOP_ZERO;
 295             blend->rt[i].blendeq_alpha = SVGA3D_BLENDEQ_ADD;
 296          }
 297
 298          if (templ->independent_blend_enable) {
 299             blend->rt[i].blend_enable = templ->rt[i].blend_enable;
 300          }
 301          else {
 302             blend->rt[i].blend_enable = templ->rt[0].blend_enable;
 303          }
 304       }
 305
 306       /* Some GL blend modes are not supported by the VGPU9 device (there's
 307        * no equivalent of PIPE_BLENDFACTOR_[INV_]CONST_ALPHA).
 308        * When we set this flag, we copy the constant blend alpha value
 309        * to the R, G, B components.
 310        * This works as long as the src/dst RGB blend factors doesn't use
 311        * PIPE_BLENDFACTOR_CONST_COLOR and PIPE_BLENDFACTOR_CONST_ALPHA
 312        * at the same time.  There's no work-around for that.
 313        */
 314       if (!svga_have_vgpu10(svga)) {
 315          if (templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 316              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 317              templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA ||
 318              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA) {
 319             blend->blend_color_alpha = TRUE;
 320          }
 321       }
 322
 323       if (templ->independent_blend_enable) {
 324          blend->rt[i].writemask = templ->rt[i].colormask;
 325       }
 326       else {
 327          blend->rt[i].writemask = templ->rt[0].colormask;
 328       }
 329    }
 330
 331    blend->independent_blend_enable = templ->independent_blend_enable;
 332
 333    blend->alpha_to_coverage = templ->alpha_to_coverage;
 334    blend->alpha_to_one = templ->alpha_to_one;
 335
 336    if (svga_have_vgpu10(svga)) {
 337       define_blend_state_object(svga, blend);
 338    }
 339
 340    svga->hud.num_blend_objects++;
 341    SVGA_STATS_COUNT_INC(svga_screen(svga->pipe.screen)->sws,
 342                         SVGA_STATS_COUNT_BLENDSTATE);
 343
 344    return blend;
 345 }
 346
 347
 348 static void svga_bind_blend_state(struct pipe_context *pipe,
 349                                   void *blend)
 350 {
 351    struct svga_context *svga = svga_context(pipe);
 352
 353    svga->curr.blend = (struct svga_blend_state*)blend;
 354    svga->dirty |= SVGA_NEW_BLEND;
 355 }
 356
 357 static void svga_delete_blend_state(struct pipe_context *pipe,
 358                                     void *blend)
 359 {
 360    struct svga_context *svga = svga_context(pipe);
 361    struct svga_blend_state *bs =
 362       (struct svga_blend_state *) blend;
 363
 364    if (bs->id != SVGA3D_INVALID_ID) {
 365       enum pipe_error ret;
 366
 367       ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 368       if (ret != PIPE_OK) {
 369          svga_context_flush(svga, NULL);
 370          ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 371          assert(ret == PIPE_OK);
 372       }
 373
 374       if (bs->id == svga->state.hw_draw.blend_id)
 375          svga->state.hw_draw.blend_id = SVGA3D_INVALID_ID;
 376
 377       util_bitmask_clear(svga->blend_object_id_bm, bs->id);
 378       bs->id = SVGA3D_INVALID_ID;
 379    }
 380
 381    FREE(blend);
 382    svga->hud.num_blend_objects--;
 383 }
 384
 385 static void svga_set_blend_color( struct pipe_context *pipe,
 386                                   const struct pipe_blend_color *blend_color )
 387 {
 388    struct svga_context *svga = svga_context(pipe);
 389
 390    svga->curr.blend_color = *blend_color;
 391
 392    svga->dirty |= SVGA_NEW_BLEND_COLOR;
 393 }
 394
 395
 396 void svga_init_blend_functions( struct svga_context *svga )
 397 {
 398    svga->pipe.create_blend_state = svga_create_blend_state;
 399    svga->pipe.bind_blend_state = svga_bind_blend_state;
 400    svga->pipe.delete_blend_state = svga_delete_blend_state;
 401
 402    svga->pipe.set_blend_color = svga_set_blend_color;
 403 }