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    }
 122
 123    /* Loop in case command buffer is full and we need to flush and retry */
 124    for (try = 0; try < 2; try++) {
 125       enum pipe_error ret;
 126
 127       ret = SVGA3D_vgpu10_DefineBlendState(svga->swc,
 128                                            bs->id,
 129                                            bs->alpha_to_coverage,
 130                                            bs->independent_blend_enable,
 131                                            perRT);
 132       if (ret == PIPE_OK)
 133          return;
 134       svga_context_flush(svga, NULL);
 135    }
 136 }
 137
 138
 139 static void *
 140 svga_create_blend_state(struct pipe_context *pipe,
 141                         const struct pipe_blend_state *templ)
 142 {
 143    struct svga_context *svga = svga_context(pipe);
 144    struct svga_blend_state *blend = CALLOC_STRUCT( svga_blend_state );
 145    unsigned i;
 146
 147    if (!blend)
 148       return NULL;
 149
 150    /* Find index of first target with blending enabled.  If no blending is
 151     * enabled at all, first_enabled will be zero.
 152     */
 153    unsigned first_enabled = 0;
 154    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 155       if (templ->rt[i].blend_enable) {
 156          first_enabled = i;
 157          break;
 158       }
 159    }
 160
 161    /* Fill in the per-rendertarget blend state.  We currently only
 162     * support independent blend enable and colormask per render target.
 163     */
 164    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 165       /* No way to set this in SVGA3D, and no way to correctly implement it on
 166        * top of D3D9 API.  Instead we try to simulate with various blend modes.
 167        */
 168       if (templ->logicop_enable) {
 169          switch (templ->logicop_func) {
 170          case PIPE_LOGICOP_XOR:
 171          case PIPE_LOGICOP_INVERT:
 172             blend->need_white_fragments = TRUE;
 173             blend->rt[i].blend_enable = TRUE;
 174             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 175             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 176             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_SUBTRACT;
 177             break;
 178          case PIPE_LOGICOP_CLEAR:
 179             blend->rt[i].blend_enable = TRUE;
 180             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 181             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 182             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 183             break;
 184          case PIPE_LOGICOP_COPY:
 185             blend->rt[i].blend_enable = FALSE;
 186             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 187             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 188             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 189             break;
 190          case PIPE_LOGICOP_COPY_INVERTED:
 191             blend->rt[i].blend_enable   = TRUE;
 192             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 193             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 194             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 195             break;
 196          case PIPE_LOGICOP_NOOP:
 197             blend->rt[i].blend_enable   = TRUE;
 198             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 199             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 200             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 201             break;
 202          case PIPE_LOGICOP_SET:
 203             blend->rt[i].blend_enable = TRUE;
 204             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 205             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 206             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 207             break;
 208          case PIPE_LOGICOP_AND:
 209             /* Approximate with minimum - works for the 0 & anything case: */
 210             blend->rt[i].blend_enable = TRUE;
 211             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 212             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 213             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 214             break;
 215          case PIPE_LOGICOP_AND_REVERSE:
 216             blend->rt[i].blend_enable = TRUE;
 217             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 218             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 219             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 220             break;
 221          case PIPE_LOGICOP_AND_INVERTED:
 222             blend->rt[i].blend_enable = TRUE;
 223             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 224             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 225             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 226             break;
 227          case PIPE_LOGICOP_OR:
 228             /* Approximate with maximum - works for the 1 | anything case: */
 229             blend->rt[i].blend_enable = TRUE;
 230             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 231             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 232             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 233             break;
 234          case PIPE_LOGICOP_OR_REVERSE:
 235             blend->rt[i].blend_enable = TRUE;
 236             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 237             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 238             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 239             break;
 240          case PIPE_LOGICOP_OR_INVERTED:
 241             blend->rt[i].blend_enable = TRUE;
 242             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 243             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 244             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 245             break;
 246          case PIPE_LOGICOP_NAND:
 247          case PIPE_LOGICOP_NOR:
 248          case PIPE_LOGICOP_EQUIV:
 249             /* Fill these in with plausible values */
 250             blend->rt[i].blend_enable = FALSE;
 251             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 252             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 253             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 254             break;
 255          default:
 256             assert(0);
 257             break;
 258          }
 259          blend->rt[i].srcblend_alpha = blend->rt[i].srcblend;
 260          blend->rt[i].dstblend_alpha = blend->rt[i].dstblend;
 261          blend->rt[i].blendeq_alpha = blend->rt[i].blendeq;
 262
 263          if (templ->logicop_func == PIPE_LOGICOP_XOR) {
 264             pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 265                                "XOR logicop mode has limited support");
 266          }
 267          else if (templ->logicop_func != PIPE_LOGICOP_COPY) {
 268             pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 269                                "general logicops are not supported");
 270          }
 271       }
 272       else {
 273          /* Note: per-target blend terms are only supported for sm4_1
 274           * device. For vgpu10 device, the blending terms must be identical
 275           * for all targets (this is why we need the first_enabled index).
 276           */
 277          const unsigned j =
 278             svga_have_sm4_1(svga) && templ->independent_blend_enable
 279             ? i : first_enabled;
 280          if (templ->independent_blend_enable || templ->rt[j].blend_enable) {
 281             blend->rt[i].srcblend =
 282                svga_translate_blend_factor(svga, templ->rt[j].rgb_src_factor);
 283             blend->rt[i].dstblend =
 284                svga_translate_blend_factor(svga, templ->rt[j].rgb_dst_factor);
 285             blend->rt[i].blendeq =
 286                svga_translate_blend_func(templ->rt[j].rgb_func);
 287             blend->rt[i].srcblend_alpha =
 288                svga_translate_blend_factor(svga, templ->rt[j].alpha_src_factor);
 289             blend->rt[i].dstblend_alpha =
 290                svga_translate_blend_factor(svga, templ->rt[j].alpha_dst_factor);
 291             blend->rt[i].blendeq_alpha =
 292                svga_translate_blend_func(templ->rt[j].alpha_func);
 293
 294             if (blend->rt[i].srcblend_alpha != blend->rt[i].srcblend ||
 295                 blend->rt[i].dstblend_alpha != blend->rt[i].dstblend ||
 296                 blend->rt[i].blendeq_alpha  != blend->rt[i].blendeq) {
 297                blend->rt[i].separate_alpha_blend_enable = TRUE;
 298             }
 299          }
 300          else {
 301             /* disabled - default blend terms */
 302             blend->rt[i].srcblend = SVGA3D_BLENDOP_ONE;
 303             blend->rt[i].dstblend = SVGA3D_BLENDOP_ZERO;
 304             blend->rt[i].blendeq = SVGA3D_BLENDEQ_ADD;
 305             blend->rt[i].srcblend_alpha = SVGA3D_BLENDOP_ONE;
 306             blend->rt[i].dstblend_alpha = SVGA3D_BLENDOP_ZERO;
 307             blend->rt[i].blendeq_alpha = SVGA3D_BLENDEQ_ADD;
 308          }
 309
 310          if (templ->independent_blend_enable) {
 311             blend->rt[i].blend_enable = templ->rt[i].blend_enable;
 312          }
 313          else {
 314             blend->rt[i].blend_enable = templ->rt[0].blend_enable;
 315          }
 316       }
 317
 318       /* Some GL blend modes are not supported by the VGPU9 device (there's
 319        * no equivalent of PIPE_BLENDFACTOR_[INV_]CONST_ALPHA).
 320        * When we set this flag, we copy the constant blend alpha value
 321        * to the R, G, B components.
 322        * This works as long as the src/dst RGB blend factors doesn't use
 323        * PIPE_BLENDFACTOR_CONST_COLOR and PIPE_BLENDFACTOR_CONST_ALPHA
 324        * at the same time.  There's no work-around for that.
 325        */
 326       if (!svga_have_vgpu10(svga)) {
 327          if (templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 328              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 329              templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA ||
 330              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA) {
 331             blend->blend_color_alpha = TRUE;
 332          }
 333       }
 334
 335       if (templ->independent_blend_enable) {
 336          blend->rt[i].writemask = templ->rt[i].colormask;
 337       }
 338       else {
 339          blend->rt[i].writemask = templ->rt[0].colormask;
 340       }
 341    }
 342
 343    blend->independent_blend_enable = templ->independent_blend_enable;
 344
 345    blend->alpha_to_coverage = templ->alpha_to_coverage;
 346    blend->alpha_to_one = templ->alpha_to_one;
 347
 348    if (svga_have_vgpu10(svga)) {
 349       define_blend_state_object(svga, blend);
 350    }
 351
 352    svga->hud.num_blend_objects++;
 353    SVGA_STATS_COUNT_INC(svga_screen(svga->pipe.screen)->sws,
 354                         SVGA_STATS_COUNT_BLENDSTATE);
 355
 356    return blend;
 357 }
 358
 359
 360 static void svga_bind_blend_state(struct pipe_context *pipe,
 361                                   void *blend)
 362 {
 363    struct svga_context *svga = svga_context(pipe);
 364
 365    svga->curr.blend = (struct svga_blend_state*)blend;
 366    svga->dirty |= SVGA_NEW_BLEND;
 367 }
 368
 369 static void svga_delete_blend_state(struct pipe_context *pipe,
 370                                     void *blend)
 371 {
 372    struct svga_context *svga = svga_context(pipe);
 373    struct svga_blend_state *bs =
 374       (struct svga_blend_state *) blend;
 375
 376    if (svga_have_vgpu10(svga) && bs->id != SVGA3D_INVALID_ID) {
 377       enum pipe_error ret;
 378
 379       ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 380       if (ret != PIPE_OK) {
 381          svga_context_flush(svga, NULL);
 382          ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 383          assert(ret == PIPE_OK);
 384       }
 385
 386       if (bs->id == svga->state.hw_draw.blend_id)
 387          svga->state.hw_draw.blend_id = SVGA3D_INVALID_ID;
 388
 389       util_bitmask_clear(svga->blend_object_id_bm, bs->id);
 390       bs->id = SVGA3D_INVALID_ID;
 391    }
 392
 393    FREE(blend);
 394    svga->hud.num_blend_objects--;
 395 }
 396
 397 static void svga_set_blend_color( struct pipe_context *pipe,
 398                                   const struct pipe_blend_color *blend_color )
 399 {
 400    struct svga_context *svga = svga_context(pipe);
 401
 402    svga->curr.blend_color = *blend_color;
 403
 404    svga->dirty |= SVGA_NEW_BLEND_COLOR;
 405 }
 406
 407
 408 void svga_init_blend_functions( struct svga_context *svga )
 409 {
 410    svga->pipe.create_blend_state = svga_create_blend_state;
 411    svga->pipe.bind_blend_state = svga_bind_blend_state;
 412    svga->pipe.delete_blend_state = svga_delete_blend_state;
 413
 414    svga->pipe.set_blend_color = svga_set_blend_color;
 415 }