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    switch (factor) {
  41    case PIPE_BLENDFACTOR_ZERO:            return SVGA3D_BLENDOP_ZERO;
  42    case PIPE_BLENDFACTOR_SRC_ALPHA:       return SVGA3D_BLENDOP_SRCALPHA;
  43    case PIPE_BLENDFACTOR_ONE:             return SVGA3D_BLENDOP_ONE;
  44    case PIPE_BLENDFACTOR_SRC_COLOR:       return SVGA3D_BLENDOP_SRCCOLOR;
  45    case PIPE_BLENDFACTOR_INV_SRC_COLOR:   return SVGA3D_BLENDOP_INVSRCCOLOR;
  46    case PIPE_BLENDFACTOR_DST_COLOR:       return SVGA3D_BLENDOP_DESTCOLOR;
  47    case PIPE_BLENDFACTOR_INV_DST_COLOR:   return SVGA3D_BLENDOP_INVDESTCOLOR;
  48    case PIPE_BLENDFACTOR_INV_SRC_ALPHA:   return SVGA3D_BLENDOP_INVSRCALPHA;
  49    case PIPE_BLENDFACTOR_DST_ALPHA:       return SVGA3D_BLENDOP_DESTALPHA;
  50    case PIPE_BLENDFACTOR_INV_DST_ALPHA:   return SVGA3D_BLENDOP_INVDESTALPHA;
  51    case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: return SVGA3D_BLENDOP_SRCALPHASAT;
  52    case PIPE_BLENDFACTOR_CONST_COLOR:     return SVGA3D_BLENDOP_BLENDFACTOR;
  53    case PIPE_BLENDFACTOR_INV_CONST_COLOR: return SVGA3D_BLENDOP_INVBLENDFACTOR;
  54    case PIPE_BLENDFACTOR_CONST_ALPHA:
  55       if (svga_have_vgpu10(svga))
  56          return SVGA3D_BLENDOP_BLENDFACTORALPHA;
  57       else
  58          return SVGA3D_BLENDOP_BLENDFACTOR; /* as close as we can get */
  59    case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
  60       if (svga_have_vgpu10(svga))
  61          return SVGA3D_BLENDOP_INVBLENDFACTORALPHA;
  62       else
  63          return SVGA3D_BLENDOP_INVBLENDFACTOR; /* as close as we can get */
  64    case PIPE_BLENDFACTOR_SRC1_COLOR:      return SVGA3D_BLENDOP_SRC1COLOR;
  65    case PIPE_BLENDFACTOR_INV_SRC1_COLOR:  return SVGA3D_BLENDOP_INVSRC1COLOR;
  66    case PIPE_BLENDFACTOR_SRC1_ALPHA:      return SVGA3D_BLENDOP_SRC1ALPHA;
  67    case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:  return SVGA3D_BLENDOP_INVSRC1ALPHA;
  68    case 0:                                return SVGA3D_BLENDOP_ONE;
  69    default:
  70       assert(0);
  71       return SVGA3D_BLENDOP_ZERO;
  72    }
  73 }
  74
  75 static inline unsigned
  76 svga_translate_blend_func(unsigned mode)
  77 {
  78    switch (mode) {
  79    case PIPE_BLEND_ADD:              return SVGA3D_BLENDEQ_ADD;
  80    case PIPE_BLEND_SUBTRACT:         return SVGA3D_BLENDEQ_SUBTRACT;
  81    case PIPE_BLEND_REVERSE_SUBTRACT: return SVGA3D_BLENDEQ_REVSUBTRACT;
  82    case PIPE_BLEND_MIN:              return SVGA3D_BLENDEQ_MINIMUM;
  83    case PIPE_BLEND_MAX:              return SVGA3D_BLENDEQ_MAXIMUM;
  84    default:
  85       assert(0);
  86       return SVGA3D_BLENDEQ_ADD;
  87    }
  88 }
  89
  90
  91 /**
  92  * Define a vgpu10 blend state object for the given
  93  * svga blend state.
  94  */
  95 static void
  96 define_blend_state_object(struct svga_context *svga,
  97                           struct svga_blend_state *bs)
  98 {
  99    SVGA3dDXBlendStatePerRT perRT[SVGA3D_MAX_RENDER_TARGETS];
 100    unsigned try;
 101    int i;
 102
 103    assert(svga_have_vgpu10(svga));
 104
 105    bs->id = util_bitmask_add(svga->blend_object_id_bm);
 106
 107    for (i = 0; i < SVGA3D_DX_MAX_RENDER_TARGETS; i++) {
 108       perRT[i].blendEnable = bs->rt[i].blend_enable;
 109       perRT[i].srcBlend = bs->rt[i].srcblend;
 110       perRT[i].destBlend = bs->rt[i].dstblend;
 111       perRT[i].blendOp = bs->rt[i].blendeq;
 112       perRT[i].srcBlendAlpha = bs->rt[i].srcblend_alpha;
 113       perRT[i].destBlendAlpha = bs->rt[i].dstblend_alpha;
 114       perRT[i].blendOpAlpha = bs->rt[i].blendeq_alpha;
 115       perRT[i].renderTargetWriteMask = bs->rt[i].writemask;
 116       perRT[i].logicOpEnable = 0;
 117       perRT[i].logicOp = SVGA3D_LOGICOP_COPY;
 118       assert(perRT[i].srcBlend == perRT[0].srcBlend);
 119    }
 120
 121    /* Loop in case command buffer is full and we need to flush and retry */
 122    for (try = 0; try < 2; try++) {
 123       enum pipe_error ret;
 124
 125       ret = SVGA3D_vgpu10_DefineBlendState(svga->swc,
 126                                            bs->id,
 127                                            bs->alpha_to_coverage,
 128                                            bs->independent_blend_enable,
 129                                            perRT);
 130       if (ret == PIPE_OK)
 131          return;
 132       svga_context_flush(svga, NULL);
 133    }
 134 }
 135
 136
 137 static void *
 138 svga_create_blend_state(struct pipe_context *pipe,
 139                         const struct pipe_blend_state *templ)
 140 {
 141    struct svga_context *svga = svga_context(pipe);
 142    struct svga_blend_state *blend = CALLOC_STRUCT( svga_blend_state );
 143    unsigned i;
 144
 145    /* Fill in the per-rendertarget blend state.  We currently only
 146     * support independent blend enable and colormask per render target.
 147     */
 148    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 149       /* No way to set this in SVGA3D, and no way to correctly implement it on
 150        * top of D3D9 API.  Instead we try to simulate with various blend modes.
 151        */
 152       if (templ->logicop_enable) {
 153          switch (templ->logicop_func) {
 154          case PIPE_LOGICOP_XOR:
 155          case PIPE_LOGICOP_INVERT:
 156             blend->need_white_fragments = TRUE;
 157             blend->rt[i].blend_enable = TRUE;
 158             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 159             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 160             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_SUBTRACT;
 161             break;
 162          case PIPE_LOGICOP_CLEAR:
 163             blend->rt[i].blend_enable = TRUE;
 164             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 165             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 166             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 167             break;
 168          case PIPE_LOGICOP_COPY:
 169             blend->rt[i].blend_enable = FALSE;
 170             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 171             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 172             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 173             break;
 174          case PIPE_LOGICOP_COPY_INVERTED:
 175             blend->rt[i].blend_enable   = TRUE;
 176             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 177             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 178             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 179             break;
 180          case PIPE_LOGICOP_NOOP:
 181             blend->rt[i].blend_enable   = TRUE;
 182             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ZERO;
 183             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 184             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 185             break;
 186          case PIPE_LOGICOP_SET:
 187             blend->rt[i].blend_enable = TRUE;
 188             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 189             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ONE;
 190             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 191             break;
 192          case PIPE_LOGICOP_AND:
 193             /* Approximate with minimum - works for the 0 & anything case: */
 194             blend->rt[i].blend_enable = TRUE;
 195             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 196             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 197             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 198             break;
 199          case PIPE_LOGICOP_AND_REVERSE:
 200             blend->rt[i].blend_enable = TRUE;
 201             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 202             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 203             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 204             break;
 205          case PIPE_LOGICOP_AND_INVERTED:
 206             blend->rt[i].blend_enable = TRUE;
 207             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 208             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 209             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MINIMUM;
 210             break;
 211          case PIPE_LOGICOP_OR:
 212             /* Approximate with maximum - works for the 1 | anything case: */
 213             blend->rt[i].blend_enable = TRUE;
 214             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 215             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 216             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 217             break;
 218          case PIPE_LOGICOP_OR_REVERSE:
 219             blend->rt[i].blend_enable = TRUE;
 220             blend->rt[i].srcblend       = SVGA3D_BLENDOP_SRCCOLOR;
 221             blend->rt[i].dstblend       = SVGA3D_BLENDOP_INVDESTCOLOR;
 222             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 223             break;
 224          case PIPE_LOGICOP_OR_INVERTED:
 225             blend->rt[i].blend_enable = TRUE;
 226             blend->rt[i].srcblend       = SVGA3D_BLENDOP_INVSRCCOLOR;
 227             blend->rt[i].dstblend       = SVGA3D_BLENDOP_DESTCOLOR;
 228             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_MAXIMUM;
 229             break;
 230          case PIPE_LOGICOP_NAND:
 231          case PIPE_LOGICOP_NOR:
 232          case PIPE_LOGICOP_EQUIV:
 233             /* Fill these in with plausible values */
 234             blend->rt[i].blend_enable = FALSE;
 235             blend->rt[i].srcblend       = SVGA3D_BLENDOP_ONE;
 236             blend->rt[i].dstblend       = SVGA3D_BLENDOP_ZERO;
 237             blend->rt[i].blendeq        = SVGA3D_BLENDEQ_ADD;
 238             break;
 239          default:
 240             assert(0);
 241             break;
 242          }
 243          blend->rt[i].srcblend_alpha = blend->rt[i].srcblend;
 244          blend->rt[i].dstblend_alpha = blend->rt[i].dstblend;
 245          blend->rt[i].blendeq_alpha = blend->rt[i].blendeq;
 246       }
 247       else {
 248          /* Note: the vgpu10 device does not yet support independent
 249           * blend terms per render target.  Target[0] always specifies the
 250           * blending terms.
 251           */
 252          if (templ->independent_blend_enable || templ->rt[0].blend_enable) {
 253             /* always use the 0th target's blending terms for now */
 254             blend->rt[i].srcblend =
 255                svga_translate_blend_factor(svga, templ->rt[0].rgb_src_factor);
 256             blend->rt[i].dstblend =
 257                svga_translate_blend_factor(svga, templ->rt[0].rgb_dst_factor);
 258             blend->rt[i].blendeq =
 259                svga_translate_blend_func(templ->rt[0].rgb_func);
 260             blend->rt[i].srcblend_alpha =
 261                svga_translate_blend_factor(svga, templ->rt[0].alpha_src_factor);
 262             blend->rt[i].dstblend_alpha =
 263                svga_translate_blend_factor(svga, templ->rt[0].alpha_dst_factor);
 264             blend->rt[i].blendeq_alpha =
 265                svga_translate_blend_func(templ->rt[0].alpha_func);
 266
 267             if (blend->rt[i].srcblend_alpha != blend->rt[i].srcblend ||
 268                 blend->rt[i].dstblend_alpha != blend->rt[i].dstblend ||
 269                 blend->rt[i].blendeq_alpha  != blend->rt[i].blendeq) {
 270                blend->rt[i].separate_alpha_blend_enable = TRUE;
 271             }
 272          }
 273          else {
 274             /* disabled - default blend terms */
 275             blend->rt[i].srcblend = SVGA3D_BLENDOP_ONE;
 276             blend->rt[i].dstblend = SVGA3D_BLENDOP_ZERO;
 277             blend->rt[i].blendeq = SVGA3D_BLENDEQ_ADD;
 278             blend->rt[i].srcblend_alpha = SVGA3D_BLENDOP_ONE;
 279             blend->rt[i].dstblend_alpha = SVGA3D_BLENDOP_ZERO;
 280             blend->rt[i].blendeq_alpha = SVGA3D_BLENDEQ_ADD;
 281          }
 282
 283          if (templ->independent_blend_enable) {
 284             blend->rt[i].blend_enable = templ->rt[i].blend_enable;
 285          }
 286          else {
 287             blend->rt[i].blend_enable = templ->rt[0].blend_enable;
 288          }
 289       }
 290
 291       /* Some GL blend modes are not supported by the VGPU9 device (there's
 292        * no equivalent of PIPE_BLENDFACTOR_[INV_]CONST_ALPHA).
 293        * When we set this flag, we copy the constant blend alpha value
 294        * to the R, G, B components.
 295        * This works as long as the src/dst RGB blend factors doesn't use
 296        * PIPE_BLENDFACTOR_CONST_COLOR and PIPE_BLENDFACTOR_CONST_ALPHA
 297        * at the same time.  There's no work-around for that.
 298        */
 299       if (!svga_have_vgpu10(svga)) {
 300          if (templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 301              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_CONST_ALPHA ||
 302              templ->rt[0].rgb_src_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA ||
 303              templ->rt[0].rgb_dst_factor == PIPE_BLENDFACTOR_INV_CONST_ALPHA) {
 304             blend->blend_color_alpha = TRUE;
 305          }
 306       }
 307
 308       if (templ->independent_blend_enable) {
 309          blend->rt[i].writemask = templ->rt[i].colormask;
 310       }
 311       else {
 312          blend->rt[i].writemask = templ->rt[0].colormask;
 313       }
 314    }
 315
 316    blend->independent_blend_enable = templ->independent_blend_enable;
 317
 318    blend->alpha_to_coverage = templ->alpha_to_coverage;
 319
 320    if (svga_have_vgpu10(svga)) {
 321       define_blend_state_object(svga, blend);
 322    }
 323
 324    return blend;
 325 }
 326
 327
 328 static void svga_bind_blend_state(struct pipe_context *pipe,
 329                                   void *blend)
 330 {
 331    struct svga_context *svga = svga_context(pipe);
 332
 333    svga->curr.blend = (struct svga_blend_state*)blend;
 334    svga->dirty |= SVGA_NEW_BLEND;
 335 }
 336
 337 static void svga_delete_blend_state(struct pipe_context *pipe,
 338                                     void *blend)
 339 {
 340    struct svga_context *svga = svga_context(pipe);
 341    struct svga_blend_state *bs =
 342       (struct svga_blend_state *) blend;
 343
 344    if (bs->id != SVGA3D_INVALID_ID) {
 345       enum pipe_error ret;
 346
 347       ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 348       if (ret != PIPE_OK) {
 349          svga_context_flush(svga, NULL);
 350          ret = SVGA3D_vgpu10_DestroyBlendState(svga->swc, bs->id);
 351          assert(ret == PIPE_OK);
 352       }
 353
 354       if (bs->id == svga->state.hw_draw.blend_id)
 355          svga->state.hw_draw.blend_id = SVGA3D_INVALID_ID;
 356
 357       util_bitmask_clear(svga->blend_object_id_bm, bs->id);
 358       bs->id = SVGA3D_INVALID_ID;
 359    }
 360
 361    FREE(blend);
 362 }
 363
 364 static void svga_set_blend_color( struct pipe_context *pipe,
 365                                   const struct pipe_blend_color *blend_color )
 366 {
 367    struct svga_context *svga = svga_context(pipe);
 368
 369    svga->curr.blend_color = *blend_color;
 370
 371    svga->dirty |= SVGA_NEW_BLEND_COLOR;
 372 }
 373
 374
 375 void svga_init_blend_functions( struct svga_context *svga )
 376 {
 377    svga->pipe.create_blend_state = svga_create_blend_state;
 378    svga->pipe.bind_blend_state = svga_bind_blend_state;
 379    svga->pipe.delete_blend_state = svga_delete_blend_state;
 380
 381    svga->pipe.set_blend_color = svga_set_blend_color;
 382 }