src/gallium/drivers/i915/i915_state.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Authors:  Keith Whitwell <keithw@vmware.com>
  29  */
  30
  31
  32 #include "draw/draw_context.h"
  33 #include "util/u_helpers.h"
  34 #include "util/u_inlines.h"
  35 #include "util/u_math.h"
  36 #include "util/u_memory.h"
  37 #include "util/u_transfer.h"
  38 #include "tgsi/tgsi_parse.h"
  39
  40 #include "i915_context.h"
  41 #include "i915_reg.h"
  42 #include "i915_state_inlines.h"
  43 #include "i915_fpc.h"
  44 #include "i915_resource.h"
  45 #include "i915_state.h"
  46
  47 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  48  * Intel drivers for "other operating systems" implement GL_CLAMP as
  49  * GL_CLAMP_TO_EDGE, so the same is done here.
  50  */
  51 static unsigned
  52 translate_wrap_mode(unsigned wrap)
  53 {
  54    switch (wrap) {
  55    case PIPE_TEX_WRAP_REPEAT:
  56       return TEXCOORDMODE_WRAP;
  57    case PIPE_TEX_WRAP_CLAMP:
  58       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  59    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  60       return TEXCOORDMODE_CLAMP_EDGE;
  61    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  62       return TEXCOORDMODE_CLAMP_BORDER;
  63    case PIPE_TEX_WRAP_MIRROR_REPEAT:
  64       return TEXCOORDMODE_MIRROR;
  65    default:
  66       return TEXCOORDMODE_WRAP;
  67    }
  68 }
  69
  70 static unsigned translate_img_filter( unsigned filter )
  71 {
  72    switch (filter) {
  73    case PIPE_TEX_FILTER_NEAREST:
  74       return FILTER_NEAREST;
  75    case PIPE_TEX_FILTER_LINEAR:
  76       return FILTER_LINEAR;
  77    default:
  78       assert(0);
  79       return FILTER_NEAREST;
  80    }
  81 }
  82
  83 static unsigned translate_mip_filter( unsigned filter )
  84 {
  85    switch (filter) {
  86    case PIPE_TEX_MIPFILTER_NONE:
  87       return MIPFILTER_NONE;
  88    case PIPE_TEX_MIPFILTER_NEAREST:
  89       return MIPFILTER_NEAREST;
  90    case PIPE_TEX_MIPFILTER_LINEAR:
  91       return MIPFILTER_LINEAR;
  92    default:
  93       assert(0);
  94       return MIPFILTER_NONE;
  95    }
  96 }
  97
  98 /* None of this state is actually used for anything yet.
  99  */
 100 static void *
 101 i915_create_blend_state(struct pipe_context *pipe,
 102                         const struct pipe_blend_state *blend)
 103 {
 104    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 105
 106    {
 107       unsigned eqRGB  = blend->rt[0].rgb_func;
 108       unsigned srcRGB = blend->rt[0].rgb_src_factor;
 109       unsigned dstRGB = blend->rt[0].rgb_dst_factor;
 110
 111       unsigned eqA    = blend->rt[0].alpha_func;
 112       unsigned srcA   = blend->rt[0].alpha_src_factor;
 113       unsigned dstA   = blend->rt[0].alpha_dst_factor;
 114
 115       /* Special handling for MIN/MAX filter modes handled at
 116        * state_tracker level.
 117        */
 118
 119       if (srcA != srcRGB ||
 120           dstA != dstRGB ||
 121           eqA != eqRGB) {
 122
 123          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 124                           IAB_MODIFY_ENABLE |
 125                           IAB_ENABLE |
 126                           IAB_MODIFY_FUNC |
 127                           IAB_MODIFY_SRC_FACTOR |
 128                           IAB_MODIFY_DST_FACTOR |
 129                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 130                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 131                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 132       }
 133       else {
 134          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 135                           IAB_MODIFY_ENABLE |
 136                           0);
 137       }
 138    }
 139
 140    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 141                         ENABLE_LOGIC_OP_FUNC |
 142                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 143
 144    if (blend->logicop_enable)
 145       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 146
 147    if (blend->dither)
 148       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 149
 150    /* We potentially do some fixup at emission for non-BGRA targets */
 151    if ((blend->rt[0].colormask & PIPE_MASK_R) == 0)
 152       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 153
 154    if ((blend->rt[0].colormask & PIPE_MASK_G) == 0)
 155       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 156
 157    if ((blend->rt[0].colormask & PIPE_MASK_B) == 0)
 158       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 159
 160    if ((blend->rt[0].colormask & PIPE_MASK_A) == 0)
 161       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 162
 163    if (blend->rt[0].blend_enable) {
 164       unsigned funcRGB = blend->rt[0].rgb_func;
 165       unsigned srcRGB  = blend->rt[0].rgb_src_factor;
 166       unsigned dstRGB  = blend->rt[0].rgb_dst_factor;
 167
 168       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 169                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 170                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 171                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 172    }
 173
 174    return cso_data;
 175 }
 176
 177 static void i915_bind_blend_state(struct pipe_context *pipe,
 178                                   void *blend)
 179 {
 180    struct i915_context *i915 = i915_context(pipe);
 181
 182    if (i915->blend == blend)
 183       return;
 184
 185    i915->blend = (struct i915_blend_state*)blend;
 186
 187    i915->dirty |= I915_NEW_BLEND;
 188 }
 189
 190
 191 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 192 {
 193    FREE(blend);
 194 }
 195
 196 static void i915_set_blend_color( struct pipe_context *pipe,
 197                                   const struct pipe_blend_color *blend_color )
 198 {
 199    struct i915_context *i915 = i915_context(pipe);
 200
 201    if (!blend_color)
 202       return;
 203
 204    i915->blend_color = *blend_color;
 205
 206    i915->dirty |= I915_NEW_BLEND;
 207 }
 208
 209 static void i915_set_stencil_ref( struct pipe_context *pipe,
 210                                   const struct pipe_stencil_ref *stencil_ref )
 211 {
 212    struct i915_context *i915 = i915_context(pipe);
 213
 214    i915->stencil_ref = *stencil_ref;
 215
 216    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 217 }
 218
 219 static void *
 220 i915_create_sampler_state(struct pipe_context *pipe,
 221                           const struct pipe_sampler_state *sampler)
 222 {
 223    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 224    const unsigned ws = sampler->wrap_s;
 225    const unsigned wt = sampler->wrap_t;
 226    const unsigned wr = sampler->wrap_r;
 227    unsigned minFilt, magFilt;
 228    unsigned mipFilt;
 229
 230    cso->templ = *sampler;
 231
 232    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 233    minFilt = translate_img_filter( sampler->min_img_filter );
 234    magFilt = translate_img_filter( sampler->mag_img_filter );
 235
 236    if (sampler->max_anisotropy > 1)
 237       minFilt = magFilt = FILTER_ANISOTROPIC;
 238
 239    if (sampler->max_anisotropy > 2) {
 240       cso->state[0] |= SS2_MAX_ANISO_4;
 241    }
 242
 243    {
 244       int b = (int) (sampler->lod_bias * 16.0);
 245       b = CLAMP(b, -256, 255);
 246       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 247    }
 248
 249    /* Shadow:
 250     */
 251    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 252    {
 253       cso->state[0] |= (SS2_SHADOW_ENABLE |
 254                         i915_translate_shadow_compare_func(sampler->compare_func));
 255
 256       minFilt = FILTER_4X4_FLAT;
 257       magFilt = FILTER_4X4_FLAT;
 258    }
 259
 260    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 261                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 262                      (magFilt << SS2_MAG_FILTER_SHIFT));
 263
 264    cso->state[1] |=
 265       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 266        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 267        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 268
 269    if (sampler->normalized_coords)
 270       cso->state[1] |= SS3_NORMALIZED_COORDS;
 271
 272    {
 273       int minlod = (int) (16.0 * sampler->min_lod);
 274       int maxlod = (int) (16.0 * sampler->max_lod);
 275       minlod = CLAMP(minlod, 0, 16 * 11);
 276       maxlod = CLAMP(maxlod, 0, 16 * 11);
 277
 278       if (minlod > maxlod)
 279          maxlod = minlod;
 280
 281       cso->minlod = minlod;
 282       cso->maxlod = maxlod;
 283    }
 284
 285    {
 286       ubyte r = float_to_ubyte(sampler->border_color.f[0]);
 287       ubyte g = float_to_ubyte(sampler->border_color.f[1]);
 288       ubyte b = float_to_ubyte(sampler->border_color.f[2]);
 289       ubyte a = float_to_ubyte(sampler->border_color.f[3]);
 290       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 291    }
 292    return cso;
 293 }
 294
 295 static void
 296 i915_bind_vertex_sampler_states(struct pipe_context *pipe,
 297                                 unsigned start,
 298                                 unsigned num,
 299                                 void **samplers)
 300 {
 301    struct i915_context *i915 = i915_context(pipe);
 302    unsigned i;
 303
 304    assert(start + num <= Elements(i915->vertex_samplers));
 305
 306    /* Check for no-op */
 307    if (num == i915->num_vertex_samplers &&
 308        !memcmp(i915->vertex_samplers + start, samplers,
 309                num * sizeof(void *)))
 310       return;
 311
 312    for (i = 0; i < num; ++i)
 313       i915->vertex_samplers[i + start] = samplers[i];
 314
 315    /* find highest non-null samplers[] entry */
 316    {
 317       unsigned j = MAX2(i915->num_vertex_samplers, start + num);
 318       while (j > 0 && i915->vertex_samplers[j - 1] == NULL)
 319          j--;
 320       i915->num_vertex_samplers = j;
 321    }
 322
 323    draw_set_samplers(i915->draw,
 324                      PIPE_SHADER_VERTEX,
 325                      i915->vertex_samplers,
 326                      i915->num_vertex_samplers);
 327 }
 328
 329
 330
 331 static void i915_bind_fragment_sampler_states(struct pipe_context *pipe,
 332                                               unsigned start,
 333                                               unsigned num,
 334                                               void **samplers)
 335 {
 336    struct i915_context *i915 = i915_context(pipe);
 337    unsigned i;
 338
 339    /* Check for no-op */
 340    if (num == i915->num_samplers &&
 341        !memcmp(i915->fragment_sampler + start, samplers,
 342                num * sizeof(void *)))
 343       return;
 344
 345    for (i = 0; i < num; ++i)
 346       i915->fragment_sampler[i + start] = samplers[i];
 347
 348    /* find highest non-null samplers[] entry */
 349    {
 350       unsigned j = MAX2(i915->num_samplers, start + num);
 351       while (j > 0 && i915->fragment_sampler[j - 1] == NULL)
 352          j--;
 353       i915->num_samplers = j;
 354    }
 355
 356    i915->dirty |= I915_NEW_SAMPLER;
 357 }
 358
 359
 360 static void
 361 i915_bind_sampler_states(struct pipe_context *pipe, unsigned shader,
 362                          unsigned start, unsigned num_samplers,
 363                          void **samplers)
 364 {
 365    switch (shader) {
 366    case PIPE_SHADER_VERTEX:
 367       i915_bind_vertex_sampler_states(pipe, start, num_samplers, samplers);
 368       break;
 369    case PIPE_SHADER_FRAGMENT:
 370       i915_bind_fragment_sampler_states(pipe, start, num_samplers, samplers);
 371       break;
 372    default:
 373       ;
 374    }
 375 }
 376
 377
 378 static void i915_delete_sampler_state(struct pipe_context *pipe,
 379                                       void *sampler)
 380 {
 381    FREE(sampler);
 382 }
 383
 384
 385 /**
 386  * Called before drawing VBO to map vertex samplers and hand them to draw
 387  */
 388 void
 389 i915_prepare_vertex_sampling(struct i915_context *i915)
 390 {
 391    struct i915_winsys *iws = i915->iws;
 392    unsigned i,j;
 393    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
 394    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
 395    uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
 396    unsigned num = i915->num_vertex_sampler_views;
 397    struct pipe_sampler_view **views = i915->vertex_sampler_views;
 398
 399    assert(num <= PIPE_MAX_SAMPLERS);
 400    if (!num)
 401       return;
 402
 403    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 404       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 405
 406       if (view) {
 407          struct pipe_resource *tex = view->texture;
 408          struct i915_texture *i915_tex = i915_texture(tex);
 409          ubyte *addr;
 410
 411          /* We're referencing the texture's internal data, so save a
 412           * reference to it.
 413           */
 414          pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
 415
 416          i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
 417          addr = iws->buffer_map(iws,
 418                                 i915_tex->buffer,
 419                                 FALSE /* read only */);
 420
 421          /* Setup array of mipmap level pointers */
 422          /* FIXME: handle 3D textures? */
 423          for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
 424             mip_offsets[j] = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
 425             row_stride[j] = i915_tex->stride;
 426             img_stride[j] = 0; /* FIXME */
 427          }
 428
 429          draw_set_mapped_texture(i915->draw,
 430                                  PIPE_SHADER_VERTEX,
 431                                  i,
 432                                  tex->width0, tex->height0, tex->depth0,
 433                                  view->u.tex.first_level, tex->last_level,
 434                                  addr,
 435                                  row_stride, img_stride, mip_offsets);
 436       } else
 437          i915->mapped_vs_tex[i] = NULL;
 438    }
 439 }
 440
 441 void
 442 i915_cleanup_vertex_sampling(struct i915_context *i915)
 443 {
 444    struct i915_winsys *iws = i915->iws;
 445    unsigned i;
 446    for (i = 0; i < Elements(i915->mapped_vs_tex); i++) {
 447       if (i915->mapped_vs_tex_buffer[i]) {
 448          iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
 449          pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
 450       }
 451    }
 452 }
 453
 454
 455
 456 /** XXX move someday?  Or consolidate all these simple state setters
 457  * into one file.
 458  */
 459
 460 static void *
 461 i915_create_depth_stencil_state(struct pipe_context *pipe,
 462                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 463 {
 464    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 465
 466    {
 467       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 468       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 469
 470       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 471                               ENABLE_STENCIL_TEST_MASK |
 472                               STENCIL_TEST_MASK(testmask) |
 473                               ENABLE_STENCIL_WRITE_MASK |
 474                               STENCIL_WRITE_MASK(writemask));
 475    }
 476
 477    if (depth_stencil->stencil[0].enabled) {
 478       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 479       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 480       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 481       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 482
 483       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 484                             S5_STENCIL_WRITE_ENABLE |
 485                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 486                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 487                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 488                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 489    }
 490
 491    if (depth_stencil->stencil[1].enabled) {
 492       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 493       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 494       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 495       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 496       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 497       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 498
 499       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 500                      BFO_ENABLE_STENCIL_FUNCS |
 501                      BFO_ENABLE_STENCIL_TWO_SIDE |
 502                      BFO_ENABLE_STENCIL_REF |
 503                      BFO_STENCIL_TWO_SIDE |
 504                      (test << BFO_STENCIL_TEST_SHIFT) |
 505                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 506                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 507                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 508
 509       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 510                      BFM_ENABLE_STENCIL_TEST_MASK |
 511                      BFM_ENABLE_STENCIL_WRITE_MASK |
 512                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 513                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 514    }
 515    else {
 516       /* This actually disables two-side stencil: The bit set is a
 517        * modify-enable bit to indicate we are changing the two-side
 518        * setting.  Then there is a symbolic zero to show that we are
 519        * setting the flag to zero/off.
 520        */
 521       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 522                      BFO_ENABLE_STENCIL_TWO_SIDE |
 523                      0);
 524       cso->bfo[1] = 0;
 525    }
 526
 527    if (depth_stencil->depth.enabled) {
 528       int func = i915_translate_compare_func(depth_stencil->depth.func);
 529
 530       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 531                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 532
 533       if (depth_stencil->depth.writemask)
 534          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 535    }
 536
 537    if (depth_stencil->alpha.enabled) {
 538       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 539       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 540
 541       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 542                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 543                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 544    }
 545
 546    return cso;
 547 }
 548
 549 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 550                                           void *depth_stencil)
 551 {
 552    struct i915_context *i915 = i915_context(pipe);
 553
 554    if (i915->depth_stencil == depth_stencil)
 555       return;
 556
 557    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 558
 559    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 560 }
 561
 562 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 563                                             void *depth_stencil)
 564 {
 565    FREE(depth_stencil);
 566 }
 567
 568
 569 static void i915_set_scissor_states( struct pipe_context *pipe,
 570                                      unsigned start_slot,
 571                                      unsigned num_scissors,
 572                                  const struct pipe_scissor_state *scissor )
 573 {
 574    struct i915_context *i915 = i915_context(pipe);
 575
 576    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 577    i915->dirty |= I915_NEW_SCISSOR;
 578 }
 579
 580
 581 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 582                                    const struct pipe_poly_stipple *stipple )
 583 {
 584 }
 585
 586
 587
 588 static void *
 589 i915_create_fs_state(struct pipe_context *pipe,
 590                      const struct pipe_shader_state *templ)
 591 {
 592    struct i915_context *i915 = i915_context(pipe);
 593    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 594    if (!ifs)
 595       return NULL;
 596
 597    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
 598    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 599
 600    tgsi_scan_shader(templ->tokens, &ifs->info);
 601
 602    /* The shader's compiled to i915 instructions here */
 603    i915_translate_fragment_program(i915, ifs);
 604
 605    return ifs;
 606 }
 607
 608 static void
 609 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 610 {
 611    struct i915_context *i915 = i915_context(pipe);
 612
 613    if (i915->fs == shader)
 614       return;
 615
 616    i915->fs = (struct i915_fragment_shader*) shader;
 617
 618    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 619
 620    i915->dirty |= I915_NEW_FS;
 621 }
 622
 623 static
 624 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 625 {
 626    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 627
 628    FREE(ifs->decl);
 629    ifs->decl = NULL;
 630
 631    FREE(ifs->program);
 632    ifs->program = NULL;
 633    FREE((struct tgsi_token *)ifs->state.tokens);
 634    ifs->state.tokens = NULL;
 635
 636    ifs->program_len = 0;
 637    ifs->decl_len = 0;
 638
 639    FREE(ifs);
 640 }
 641
 642
 643 static void *
 644 i915_create_vs_state(struct pipe_context *pipe,
 645                      const struct pipe_shader_state *templ)
 646 {
 647    struct i915_context *i915 = i915_context(pipe);
 648
 649    /* just pass-through to draw module */
 650    return draw_create_vertex_shader(i915->draw, templ);
 651 }
 652
 653 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 654 {
 655    struct i915_context *i915 = i915_context(pipe);
 656
 657    if (i915->vs == shader)
 658       return;
 659
 660    i915->vs = shader;
 661
 662    /* just pass-through to draw module */
 663    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 664
 665    i915->dirty |= I915_NEW_VS;
 666 }
 667
 668 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 669 {
 670    struct i915_context *i915 = i915_context(pipe);
 671
 672    /* just pass-through to draw module */
 673    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 674 }
 675
 676 static void i915_set_constant_buffer(struct pipe_context *pipe,
 677                                      uint shader, uint index,
 678                                      struct pipe_constant_buffer *cb)
 679 {
 680    struct i915_context *i915 = i915_context(pipe);
 681    struct pipe_resource *buf = cb ? cb->buffer : NULL;
 682    unsigned new_num = 0;
 683    boolean diff = TRUE;
 684
 685    /* XXX don't support geom shaders now */
 686    if (shader == PIPE_SHADER_GEOMETRY)
 687       return;
 688
 689    if (cb && cb->user_buffer) {
 690       buf = i915_user_buffer_create(pipe->screen, (void *) cb->user_buffer,
 691                                     cb->buffer_size,
 692                                     PIPE_BIND_CONSTANT_BUFFER);
 693    }
 694
 695    /* if we have a new buffer compare it with the old one */
 696    if (buf) {
 697       struct i915_buffer *ibuf = i915_buffer(buf);
 698       struct pipe_resource *old_buf = i915->constants[shader];
 699       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 700       unsigned old_num = i915->current.num_user_constants[shader];
 701
 702       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 703
 704       if (old_num == new_num) {
 705          if (old_num == 0)
 706             diff = FALSE;
 707 #if 0
 708          /* XXX no point in running this code since st/mesa only uses user buffers */
 709          /* Can't compare the buffer data since they are userbuffers */
 710          else if (old && old->free_on_destroy)
 711             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 712 #else
 713          (void)old;
 714 #endif
 715       }
 716    } else {
 717       diff = i915->current.num_user_constants[shader] != 0;
 718    }
 719
 720    pipe_resource_reference(&i915->constants[shader], buf);
 721    i915->current.num_user_constants[shader] = new_num;
 722
 723    if (diff)
 724       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 725
 726    if (cb && cb->user_buffer) {
 727       pipe_resource_reference(&buf, NULL);
 728    }
 729 }
 730
 731
 732 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 733                                             unsigned num,
 734                                             struct pipe_sampler_view **views)
 735 {
 736    struct i915_context *i915 = i915_context(pipe);
 737    uint i;
 738
 739    assert(num <= PIPE_MAX_SAMPLERS);
 740
 741    /* Check for no-op */
 742    if (num == i915->num_fragment_sampler_views &&
 743        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 744       return;
 745
 746    for (i = 0; i < num; i++) {
 747       /* Note: we're using pipe_sampler_view_release() here to work around
 748        * a possible crash when the old view belongs to another context that
 749        * was already destroyed.
 750        */
 751       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
 752       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 753                                   views[i]);
 754    }
 755
 756    for (i = num; i < i915->num_fragment_sampler_views; i++)
 757       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
 758
 759    i915->num_fragment_sampler_views = num;
 760
 761    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 762 }
 763
 764 static void
 765 i915_set_vertex_sampler_views(struct pipe_context *pipe,
 766                               unsigned num,
 767                               struct pipe_sampler_view **views)
 768 {
 769    struct i915_context *i915 = i915_context(pipe);
 770    uint i;
 771
 772    assert(num <= Elements(i915->vertex_sampler_views));
 773
 774    /* Check for no-op */
 775    if (num == i915->num_vertex_sampler_views &&
 776        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 777       return;
 778    }
 779
 780    for (i = 0; i < Elements(i915->vertex_sampler_views); i++) {
 781       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 782
 783       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
 784    }
 785
 786    i915->num_vertex_sampler_views = num;
 787
 788    draw_set_sampler_views(i915->draw,
 789                           PIPE_SHADER_VERTEX,
 790                           i915->vertex_sampler_views,
 791                           i915->num_vertex_sampler_views);
 792 }
 793
 794
 795 static void
 796 i915_set_sampler_views(struct pipe_context *pipe, unsigned shader,
 797                        unsigned start, unsigned num,
 798                        struct pipe_sampler_view **views)
 799 {
 800    assert(start == 0);
 801    switch (shader) {
 802    case PIPE_SHADER_FRAGMENT:
 803       i915_set_fragment_sampler_views(pipe, num, views);
 804       break;
 805    case PIPE_SHADER_VERTEX:
 806       i915_set_vertex_sampler_views(pipe, num, views);
 807       break;
 808    default:
 809       ;
 810    }
 811 }
 812
 813
 814 struct pipe_sampler_view *
 815 i915_create_sampler_view_custom(struct pipe_context *pipe,
 816                                 struct pipe_resource *texture,
 817                                 const struct pipe_sampler_view *templ,
 818                                 unsigned width0,
 819                                 unsigned height0)
 820 {
 821    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 822
 823    if (view) {
 824       *view = *templ;
 825       view->reference.count = 1;
 826       view->texture = NULL;
 827       pipe_resource_reference(&view->texture, texture);
 828       view->context = pipe;
 829    }
 830
 831    return view;
 832 }
 833
 834 static struct pipe_sampler_view *
 835 i915_create_sampler_view(struct pipe_context *pipe,
 836                          struct pipe_resource *texture,
 837                          const struct pipe_sampler_view *templ)
 838 {
 839    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 840
 841    if (view) {
 842       *view = *templ;
 843       view->reference.count = 1;
 844       view->texture = NULL;
 845       pipe_resource_reference(&view->texture, texture);
 846       view->context = pipe;
 847    }
 848
 849    return view;
 850 }
 851
 852
 853 static void
 854 i915_sampler_view_destroy(struct pipe_context *pipe,
 855                           struct pipe_sampler_view *view)
 856 {
 857    pipe_resource_reference(&view->texture, NULL);
 858    FREE(view);
 859 }
 860
 861
 862 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 863                                        const struct pipe_framebuffer_state *fb)
 864 {
 865    struct i915_context *i915 = i915_context(pipe);
 866    int i;
 867
 868    i915->framebuffer.width = fb->width;
 869    i915->framebuffer.height = fb->height;
 870    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 871    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 872       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 873                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 874    }
 875    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 876
 877    i915->dirty |= I915_NEW_FRAMEBUFFER;
 878 }
 879
 880
 881
 882 static void i915_set_clip_state( struct pipe_context *pipe,
 883                              const struct pipe_clip_state *clip )
 884 {
 885    struct i915_context *i915 = i915_context(pipe);
 886
 887    i915->clip = *clip;
 888
 889    draw_set_clip_state(i915->draw, clip);
 890
 891    i915->dirty |= I915_NEW_CLIP;
 892 }
 893
 894
 895
 896 /* Called when driver state tracker notices changes to the viewport
 897  * matrix:
 898  */
 899 static void i915_set_viewport_states( struct pipe_context *pipe,
 900                                       unsigned start_slot,
 901                                       unsigned num_viewports,
 902                                      const struct pipe_viewport_state *viewport )
 903 {
 904    struct i915_context *i915 = i915_context(pipe);
 905
 906    i915->viewport = *viewport; /* struct copy */
 907
 908    /* pass the viewport info to the draw module */
 909    draw_set_viewport_states(i915->draw, start_slot, num_viewports,
 910                             &i915->viewport);
 911
 912    i915->dirty |= I915_NEW_VIEWPORT;
 913 }
 914
 915
 916 static void *
 917 i915_create_rasterizer_state(struct pipe_context *pipe,
 918                              const struct pipe_rasterizer_state *rasterizer)
 919 {
 920    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 921
 922    cso->templ = *rasterizer;
 923    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 924    cso->light_twoside = rasterizer->light_twoside;
 925    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 926    cso->ds[1].f = rasterizer->offset_scale;
 927    if (rasterizer->poly_stipple_enable) {
 928       cso->st |= ST1_ENABLE;
 929    }
 930
 931    if (rasterizer->scissor)
 932       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 933    else
 934       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 935
 936    switch (rasterizer->cull_face) {
 937    case PIPE_FACE_NONE:
 938       cso->LIS4 |= S4_CULLMODE_NONE;
 939       break;
 940    case PIPE_FACE_FRONT:
 941       if (rasterizer->front_ccw)
 942          cso->LIS4 |= S4_CULLMODE_CCW;
 943       else
 944          cso->LIS4 |= S4_CULLMODE_CW;
 945       break;
 946    case PIPE_FACE_BACK:
 947       if (rasterizer->front_ccw)
 948          cso->LIS4 |= S4_CULLMODE_CW;
 949       else
 950          cso->LIS4 |= S4_CULLMODE_CCW;
 951       break;
 952    case PIPE_FACE_FRONT_AND_BACK:
 953       cso->LIS4 |= S4_CULLMODE_BOTH;
 954       break;
 955    }
 956
 957    {
 958       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 959
 960       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 961
 962       if (rasterizer->line_smooth)
 963          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 964    }
 965
 966    {
 967       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 968
 969       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 970    }
 971
 972    if (rasterizer->flatshade) {
 973       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 974                     S4_FLATSHADE_COLOR |
 975                     S4_FLATSHADE_SPECULAR);
 976    }
 977
 978    cso->LIS7 = fui( rasterizer->offset_units );
 979
 980
 981    return cso;
 982 }
 983
 984 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 985                                         void *raster )
 986 {
 987    struct i915_context *i915 = i915_context(pipe);
 988
 989    if (i915->rasterizer == raster)
 990       return;
 991
 992    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 993
 994    /* pass-through to draw module */
 995    draw_set_rasterizer_state(i915->draw,
 996                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 997                            raster);
 998
 999    i915->dirty |= I915_NEW_RASTERIZER;
1000 }
1001
1002 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
1003                                          void *raster)
1004 {
1005    FREE(raster);
1006 }
1007
1008 static void i915_set_vertex_buffers(struct pipe_context *pipe,
1009                                     unsigned start_slot, unsigned count,
1010                                     const struct pipe_vertex_buffer *buffers)
1011 {
1012    struct i915_context *i915 = i915_context(pipe);
1013    struct draw_context *draw = i915->draw;
1014
1015    util_set_vertex_buffers_count(i915->vertex_buffers,
1016                                  &i915->nr_vertex_buffers,
1017                                  buffers, start_slot, count);
1018
1019    /* pass-through to draw module */
1020    draw_set_vertex_buffers(draw, start_slot, count, buffers);
1021 }
1022
1023 static void *
1024 i915_create_vertex_elements_state(struct pipe_context *pipe,
1025                                   unsigned count,
1026                                   const struct pipe_vertex_element *attribs)
1027 {
1028    struct i915_velems_state *velems;
1029    assert(count <= PIPE_MAX_ATTRIBS);
1030    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
1031    if (velems) {
1032       velems->count = count;
1033       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
1034    }
1035    return velems;
1036 }
1037
1038 static void
1039 i915_bind_vertex_elements_state(struct pipe_context *pipe,
1040                                 void *velems)
1041 {
1042    struct i915_context *i915 = i915_context(pipe);
1043    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
1044
1045    if (i915->velems == velems)
1046       return;
1047
1048    i915->velems = velems;
1049
1050    /* pass-through to draw module */
1051    if (i915_velems) {
1052       draw_set_vertex_elements(i915->draw,
1053             i915_velems->count, i915_velems->velem);
1054    }
1055 }
1056
1057 static void
1058 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
1059 {
1060    FREE( velems );
1061 }
1062
1063 static void i915_set_index_buffer(struct pipe_context *pipe,
1064                                   const struct pipe_index_buffer *ib)
1065 {
1066    struct i915_context *i915 = i915_context(pipe);
1067
1068    if (ib)
1069       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1070    else
1071       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1072 }
1073
1074 static void
1075 i915_set_sample_mask(struct pipe_context *pipe,
1076                      unsigned sample_mask)
1077 {
1078 }
1079
1080 void
1081 i915_init_state_functions( struct i915_context *i915 )
1082 {
1083    i915->base.create_blend_state = i915_create_blend_state;
1084    i915->base.bind_blend_state = i915_bind_blend_state;
1085    i915->base.delete_blend_state = i915_delete_blend_state;
1086
1087    i915->base.create_sampler_state = i915_create_sampler_state;
1088    i915->base.bind_sampler_states = i915_bind_sampler_states;
1089    i915->base.delete_sampler_state = i915_delete_sampler_state;
1090
1091    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1092    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1093    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1094
1095    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1096    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1097    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1098    i915->base.create_fs_state = i915_create_fs_state;
1099    i915->base.bind_fs_state = i915_bind_fs_state;
1100    i915->base.delete_fs_state = i915_delete_fs_state;
1101    i915->base.create_vs_state = i915_create_vs_state;
1102    i915->base.bind_vs_state = i915_bind_vs_state;
1103    i915->base.delete_vs_state = i915_delete_vs_state;
1104    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1105    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1106    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1107
1108    i915->base.set_blend_color = i915_set_blend_color;
1109    i915->base.set_stencil_ref = i915_set_stencil_ref;
1110    i915->base.set_clip_state = i915_set_clip_state;
1111    i915->base.set_sample_mask = i915_set_sample_mask;
1112    i915->base.set_constant_buffer = i915_set_constant_buffer;
1113    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1114
1115    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1116    i915->base.set_scissor_states = i915_set_scissor_states;
1117    i915->base.set_sampler_views = i915_set_sampler_views;
1118    i915->base.create_sampler_view = i915_create_sampler_view;
1119    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1120    i915->base.set_viewport_states = i915_set_viewport_states;
1121    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1122    i915->base.set_index_buffer = i915_set_index_buffer;
1123 }