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    /* Find index of first target with blending enabled.  -1 means blending
 152     * is not enabled at all.
 153     */
 154    int first_enabled = -1;
 155    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 156       if (templ->rt[i].blend_enable) {
 157          first_enabled = i;
 158          break;
 159       }
 160    }
 161
 162    /* Fill in the per-rendertarget blend state.  We currently only
 163     * support independent blend enable and colormask per render target.
 164     */
 165    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 166       /* No way to set this in SVGA3D, and no way to correctly implement it on
 167        * top of D3D9 API.  Instead we try to simulate with various blend modes.
 168        */
 169       if (templ->logicop_enable) {
 170          switch (templ->logicop_func) {
 171          case PIPE_LOGICOP_XOR:
 172          case PIPE_LOGICOP_INVERT:
 173             blend->need_white_fragments = TRUE;
 174             blend->rt[i].blend_enable = TRUE;
 175             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 176             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 177             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_SUBTRACT;
 178             break;
 179          case PIPE_LOGICOP_CLEAR:
 180             blend->rt[i].blend_enable = TRUE;
 181             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 182             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 183             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 184             break;
 185          case PIPE_LOGICOP_COPY:
 186             blend->rt[i].blend_enable = FALSE;
 187             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 188             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 189             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 190             break;
 191          case PIPE_LOGICOP_COPY_INVERTED:
 192             blend->rt[i].blend_enable   = TRUE;
 193             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 194             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 195             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 196             break;
 197          case PIPE_LOGICOP_NOOP:
 198             blend->rt[i].blend_enable   = TRUE;
 199             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 200             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 201             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 202             break;
 203          case PIPE_LOGICOP_SET:
 204             blend->rt[i].blend_enable = TRUE;
 205             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 206             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 207             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 208             break;
 209          case PIPE_LOGICOP_AND:
 210             /* Approximate with minimum - works for the 0 & anything case: */
 211             blend->rt[i].blend_enable = TRUE;
 212             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 213             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 214             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 215             break;
 216          case PIPE_LOGICOP_AND_REVERSE:
 217             blend->rt[i].blend_enable = TRUE;
 218             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 219             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 220             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 221             break;
 222          case PIPE_LOGICOP_AND_INVERTED:
 223             blend->rt[i].blend_enable = TRUE;
 224             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 225             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 226             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 227             break;
 228          case PIPE_LOGICOP_OR:
 229             /* Approximate with maximum - works for the 1 | anything case: */
 230             blend->rt[i].blend_enable = TRUE;
 231             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 232             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 233             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 234             break;
 235          case PIPE_LOGICOP_OR_REVERSE:
 236             blend->rt[i].blend_enable = TRUE;
 237             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 238             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 239             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 240             break;
 241          case PIPE_LOGICOP_OR_INVERTED:
 242             blend->rt[i].blend_enable = TRUE;
 243             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 244             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 245             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 246             break;
 247          case PIPE_LOGICOP_NAND:
 248          case PIPE_LOGICOP_NOR:
 249          case PIPE_LOGICOP_EQUIV:
 250             /* Fill these in with plausible values */
 251             blend->rt[i].blend_enable = FALSE;
 252             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 253             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 254             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 255             break;
 256          default:
 257             assert(0);
 258             break;
 259          }
 260          blend->rt[i].srcblend_alpha = blend->rt[i].srcblend;
 261          blend->rt[i].dstblend_alpha = blend->rt[i].dstblend;
 262          blend->rt[i].blendeq_alpha = blend->rt[i].blendeq;
 263
 264          if (templ->logicop_func == PIPE_LOGICOP_XOR) {
 265             pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 266                                "XOR logicop mode has limited support");
 267          }
 268          else if (templ->logicop_func != PIPE_LOGICOP_COPY) {
 269             pipe_debug_message(&svga->debug.callback, CONFORMANCE,
 270                                "general logicops are not supported");
 271          }
 272       }
 273       else {
 274          /* Note: the vgpu10 device does not yet support independent blend
 275           * terms per render target.  When blending is enabled, the blend
 276           * terms must match for all targets.
 277           */
 278          if (first_enabled >= 0) {
 279             /* use first enabled target's blending terms */
 280             const struct pipe_rt_blend_state *rt = &templ->rt[first_enabled];
 281
 282             blend->rt[i].srcblend =
 283                svga_translate_blend_factor(svga, rt->rgb_src_factor);
 284             blend->rt[i].dstblend =
 285                svga_translate_blend_factor(svga, rt->rgb_dst_factor);
 286             blend->rt[i].blendeq =
 287                svga_translate_blend_func(rt->rgb_func);
 288             blend->rt[i].srcblend_alpha =
 289                svga_translate_blend_factor(svga, rt->alpha_src_factor);
 290             blend->rt[i].dstblend_alpha =
 291                svga_translate_blend_factor(svga, rt->alpha_dst_factor);
 292             blend->rt[i].blendeq_alpha =
 293                svga_translate_blend_func(rt->alpha_func);
 294
 295             if (blend->rt[i].srcblend_alpha != blend->rt[i].srcblend ||
 296                 blend->rt[i].dstblend_alpha != blend->rt[i].dstblend ||
 297                 blend->rt[i].blendeq_alpha  != blend->rt[i].blendeq) {
 298                blend->rt[i].separate_alpha_blend_enable = TRUE;
 299             }
 300          }
 301          else {
 302             /* disabled - default blend terms */
 303             blend->rt[i].srcblend = SVGA3D_BLENDOP_ONE;
 304             blend->rt[i].dstblend = SVGA3D_BLENDOP_ZERO;
 305             blend->rt[i].blendeq = SVGA3D_BLENDEQ_ADD;
 306             blend->rt[i].srcblend_alpha = SVGA3D_BLENDOP_ONE;
 307             blend->rt[i].dstblend_alpha = SVGA3D_BLENDOP_ZERO;
 308             blend->rt[i].blendeq_alpha = SVGA3D_BLENDEQ_ADD;
 309          }
 310
 311          if (templ->independent_blend_enable) {
 312             blend->rt[i].blend_enable = templ->rt[i].blend_enable;
 313          }
 314          else {
 315             blend->rt[i].blend_enable = templ->rt[0].blend_enable;
 316          }
 317       }
 318
 319       /* Some GL blend modes are not supported by the VGPU9 device (there's
 320        * no equivalent of PIPE_BLENDFACTOR_[INV_]CONST_ALPHA).
 321        * When we set this flag, we copy the constant blend alpha value
 322        * to the R, G, B components.
 323        * This works as long as the src/dst RGB blend factors doesn't use
 324        * PIPE_BLENDFACTOR_CONST_COLOR and PIPE_BLENDFACTOR_CONST_ALPHA
 325        * at the same time.  There's no work-around for that.
 326        */
 327       if (!svga_have_vgpu10(svga)) {
 328          if (templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 329              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 330              templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA ||
 331              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA) {
 332             blend->blend_color_alpha = TRUE;
 333          }
 334       }
 335
 336       if (templ->independent_blend_enable) {
 337          blend->rt[i].writemask = templ->rt[i].colormask;
 338       }
 339       else {
 340          blend->rt[i].writemask = templ->rt[0].colormask;
 341       }
 342    }
 343
 344    blend->independent_blend_enable = templ->independent_blend_enable;
 345
 346    blend->alpha_to_coverage = templ->alpha_to_coverage;
 347    blend->alpha_to_one = templ->alpha_to_one;
 348
 349    if (svga_have_vgpu10(svga)) {
 350       define_blend_state_object(svga, blend);
 351    }
 352
 353    svga->hud.num_blend_objects++;
 354    SVGA_STATS_COUNT_INC(svga_screen(svga->pipe.screen)->sws,
 355                         SVGA_STATS_COUNT_BLENDSTATE);
 356
 357    return blend;
 358 }
 359
 360
 361 static void svga_bind_blend_state(struct pipe_context *pipe,
 362                                   void *blend)
 363 {
 364    struct svga_context *svga = svga_context(pipe);
 365
 366    svga->curr.blend = (struct svga_blend_state*)blend;
 367    svga->dirty |= SVGA_NEW_BLEND;
 368 }
 369
 370 static void svga_delete_blend_state(struct pipe_context *pipe,
 371                                     void *blend)
 372 {
 373    struct svga_context *svga = svga_context(pipe);
 374    struct svga_blend_state *bs =
 375       (struct svga_blend_state *) blend;
 376
 377    if (svga_have_vgpu10(svga) && bs->id != SVGA3D_INVALID_ID) {
 378       enum pipe_error ret;
 379
 380       ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 381       if (ret != PIPE_OK) {
 382          svga_context_flush(svga, NULL);
 383          ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 384          assert(ret == PIPE_OK);
 385       }
 386
 387       if (bs->id == svga->state.hw_draw.blend_id)
 388          svga->state.hw_draw.blend_id = SVGA3D_INVALID_ID;
 389
 390       util_bitmask_clear(svga->blend_object_id_bm, bs->id);
 391       bs->id = SVGA3D_INVALID_ID;
 392    }
 393
 394    FREE(blend);
 395    svga->hud.num_blend_objects--;
 396 }
 397
 398 static void svga_set_blend_color( struct pipe_context *pipe,
 399                                   const struct pipe_blend_color *blend_color )
 400 {
 401    struct svga_context *svga = svga_context(pipe);
 402
 403    svga->curr.blend_color = *blend_color;
 404
 405    svga->dirty |= SVGA_NEW_BLEND_COLOR;
 406 }
 407
 408
 409 void svga_init_blend_functions( struct svga_context *svga )
 410 {
 411    svga->pipe.create_blend_state = svga_create_blend_state;
 412    svga->pipe.bind_blend_state = svga_bind_blend_state;
 413    svga->pipe.delete_blend_state = svga_delete_blend_state;
 414
 415    svga->pipe.set_blend_color = svga_set_blend_color;
 416 }