src/gallium/drivers/i915/i915_state.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com>
  29  */
  30
  31
  32 #include "draw/draw_context.h"
  33 #include "util/u_inlines.h"
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36 #include "util/u_transfer.h"
  37 #include "tgsi/tgsi_parse.h"
  38
  39 #include "i915_context.h"
  40 #include "i915_reg.h"
  41 #include "i915_state_inlines.h"
  42 #include "i915_fpc.h"
  43 #include "i915_resource.h"
  44
  45 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  46  * Intel drivers for "other operating systems" implement GL_CLAMP as
  47  * GL_CLAMP_TO_EDGE, so the same is done here.
  48  */
  49 static unsigned
  50 translate_wrap_mode(unsigned wrap)
  51 {
  52    switch (wrap) {
  53    case PIPE_TEX_WRAP_REPEAT:
  54       return TEXCOORDMODE_WRAP;
  55    case PIPE_TEX_WRAP_CLAMP:
  56       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  57    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  58       return TEXCOORDMODE_CLAMP_EDGE;
  59    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  60       return TEXCOORDMODE_CLAMP_BORDER;
  61    case PIPE_TEX_WRAP_MIRROR_REPEAT:
  62       return TEXCOORDMODE_MIRROR;
  63    default:
  64       return TEXCOORDMODE_WRAP;
  65    }
  66 }
  67
  68 static unsigned translate_img_filter( unsigned filter )
  69 {
  70    switch (filter) {
  71    case PIPE_TEX_FILTER_NEAREST:
  72       return FILTER_NEAREST;
  73    case PIPE_TEX_FILTER_LINEAR:
  74       return FILTER_LINEAR;
  75    default:
  76       assert(0);
  77       return FILTER_NEAREST;
  78    }
  79 }
  80
  81 static unsigned translate_mip_filter( unsigned filter )
  82 {
  83    switch (filter) {
  84    case PIPE_TEX_MIPFILTER_NONE:
  85       return MIPFILTER_NONE;
  86    case PIPE_TEX_MIPFILTER_NEAREST:
  87       return MIPFILTER_NEAREST;
  88    case PIPE_TEX_MIPFILTER_LINEAR:
  89       return MIPFILTER_LINEAR;
  90    default:
  91       assert(0);
  92       return MIPFILTER_NONE;
  93    }
  94 }
  95
  96
  97 /* None of this state is actually used for anything yet.
  98  */
  99 static void *
 100 i915_create_blend_state(struct pipe_context *pipe,
 101                         const struct pipe_blend_state *blend)
 102 {
 103    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 104
 105    {
 106       unsigned eqRGB  = blend->rt[0].rgb_func;
 107       unsigned srcRGB = blend->rt[0].rgb_src_factor;
 108       unsigned dstRGB = blend->rt[0].rgb_dst_factor;
 109
 110       unsigned eqA    = blend->rt[0].alpha_func;
 111       unsigned srcA   = blend->rt[0].alpha_src_factor;
 112       unsigned dstA   = blend->rt[0].alpha_dst_factor;
 113
 114       /* Special handling for MIN/MAX filter modes handled at
 115        * state_tracker level.
 116        */
 117
 118       if (srcA != srcRGB ||
 119           dstA != dstRGB ||
 120           eqA != eqRGB) {
 121
 122          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 123                           IAB_MODIFY_ENABLE |
 124                           IAB_ENABLE |
 125                           IAB_MODIFY_FUNC |
 126                           IAB_MODIFY_SRC_FACTOR |
 127                           IAB_MODIFY_DST_FACTOR |
 128                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 129                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 130                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 131       }
 132       else {
 133          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 134                           IAB_MODIFY_ENABLE |
 135                           0);
 136       }
 137    }
 138
 139    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 140                         ENABLE_LOGIC_OP_FUNC |
 141                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 142
 143    if (blend->logicop_enable)
 144       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 145
 146    if (blend->dither)
 147       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 148
 149    if ((blend->rt[0].colormask & PIPE_MASK_R) == 0)
 150       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 151
 152    if ((blend->rt[0].colormask & PIPE_MASK_G) == 0)
 153       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 154
 155    if ((blend->rt[0].colormask & PIPE_MASK_B) == 0)
 156       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 157
 158    if ((blend->rt[0].colormask & PIPE_MASK_A) == 0)
 159       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 160
 161    if (blend->rt[0].blend_enable) {
 162       unsigned funcRGB = blend->rt[0].rgb_func;
 163       unsigned srcRGB  = blend->rt[0].rgb_src_factor;
 164       unsigned dstRGB  = blend->rt[0].rgb_dst_factor;
 165
 166       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 167                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 168                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 169                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 170    }
 171
 172    return cso_data;
 173 }
 174
 175 static void i915_bind_blend_state(struct pipe_context *pipe,
 176                                   void *blend)
 177 {
 178    struct i915_context *i915 = i915_context(pipe);
 179    draw_flush(i915->draw);
 180
 181    i915->blend = (struct i915_blend_state*)blend;
 182
 183    i915->dirty |= I915_NEW_BLEND;
 184 }
 185
 186
 187 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 188 {
 189    FREE(blend);
 190 }
 191
 192 static void i915_set_blend_color( struct pipe_context *pipe,
 193                                   const struct pipe_blend_color *blend_color )
 194 {
 195    struct i915_context *i915 = i915_context(pipe);
 196    draw_flush(i915->draw);
 197
 198    i915->blend_color = *blend_color;
 199
 200    i915->dirty |= I915_NEW_BLEND;
 201 }
 202
 203 static void i915_set_stencil_ref( struct pipe_context *pipe,
 204                                   const struct pipe_stencil_ref *stencil_ref )
 205 {
 206    struct i915_context *i915 = i915_context(pipe);
 207    draw_flush(i915->draw);
 208
 209    i915->stencil_ref = *stencil_ref;
 210
 211    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 212 }
 213
 214 static void *
 215 i915_create_sampler_state(struct pipe_context *pipe,
 216                           const struct pipe_sampler_state *sampler)
 217 {
 218    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 219    const unsigned ws = sampler->wrap_s;
 220    const unsigned wt = sampler->wrap_t;
 221    const unsigned wr = sampler->wrap_r;
 222    unsigned minFilt, magFilt;
 223    unsigned mipFilt;
 224
 225    cso->templ = sampler;
 226
 227    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 228    minFilt = translate_img_filter( sampler->min_img_filter );
 229    magFilt = translate_img_filter( sampler->mag_img_filter );
 230
 231    if (sampler->max_anisotropy > 1)
 232       minFilt = magFilt = FILTER_ANISOTROPIC;
 233
 234    if (sampler->max_anisotropy > 2) {
 235       cso->state[0] |= SS2_MAX_ANISO_4;
 236    }
 237
 238    {
 239       int b = (int) (sampler->lod_bias * 16.0);
 240       b = CLAMP(b, -256, 255);
 241       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 242    }
 243
 244    /* Shadow:
 245     */
 246    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 247    {
 248       cso->state[0] |= (SS2_SHADOW_ENABLE |
 249                         i915_translate_compare_func(sampler->compare_func));
 250
 251       minFilt = FILTER_4X4_FLAT;
 252       magFilt = FILTER_4X4_FLAT;
 253    }
 254
 255    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 256                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 257                      (magFilt << SS2_MAG_FILTER_SHIFT));
 258
 259    cso->state[1] |=
 260       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 261        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 262        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 263
 264    if (sampler->normalized_coords)
 265       cso->state[1] |= SS3_NORMALIZED_COORDS;
 266
 267    {
 268       int minlod = (int) (16.0 * sampler->min_lod);
 269       int maxlod = (int) (16.0 * sampler->max_lod);
 270       minlod = CLAMP(minlod, 0, 16 * 11);
 271       maxlod = CLAMP(maxlod, 0, 16 * 11);
 272
 273       if (minlod > maxlod)
 274          maxlod = minlod;
 275
 276       cso->minlod = minlod;
 277       cso->maxlod = maxlod;
 278    }
 279
 280    {
 281       ubyte r = float_to_ubyte(sampler->border_color[0]);
 282       ubyte g = float_to_ubyte(sampler->border_color[1]);
 283       ubyte b = float_to_ubyte(sampler->border_color[2]);
 284       ubyte a = float_to_ubyte(sampler->border_color[3]);
 285       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 286    }
 287    return cso;
 288 }
 289
 290 static void i915_fixup_bind_sampler_states(struct pipe_context *pipe,
 291                                            unsigned num, void **sampler)
 292 {
 293    struct i915_context *i915 = i915_context(pipe);
 294
 295    i915->saved_nr_samplers = num;
 296    memcpy(&i915->saved_samplers, sampler, sizeof(void *) * num);
 297
 298    i915->saved_bind_sampler_states(pipe, num, sampler);
 299 }
 300
 301 static void i915_bind_sampler_states(struct pipe_context *pipe,
 302                                      unsigned num, void **sampler)
 303 {
 304    struct i915_context *i915 = i915_context(pipe);
 305    unsigned i;
 306
 307    /* Check for no-op */
 308    if (num == i915->num_samplers &&
 309        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 310       return;
 311
 312    draw_flush(i915->draw);
 313
 314    for (i = 0; i < num; ++i)
 315       i915->sampler[i] = sampler[i];
 316    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 317       i915->sampler[i] = NULL;
 318
 319    i915->num_samplers = num;
 320
 321    i915->dirty |= I915_NEW_SAMPLER;
 322 }
 323
 324 static void i915_delete_sampler_state(struct pipe_context *pipe,
 325                                       void *sampler)
 326 {
 327    FREE(sampler);
 328 }
 329
 330
 331 /** XXX move someday?  Or consolidate all these simple state setters
 332  * into one file.
 333  */
 334
 335 static void *
 336 i915_create_depth_stencil_state(struct pipe_context *pipe,
 337                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 338 {
 339    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 340
 341    {
 342       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 343       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 344
 345       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 346                               ENABLE_STENCIL_TEST_MASK |
 347                               STENCIL_TEST_MASK(testmask) |
 348                               ENABLE_STENCIL_WRITE_MASK |
 349                               STENCIL_WRITE_MASK(writemask));
 350    }
 351
 352    if (depth_stencil->stencil[0].enabled) {
 353       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 354       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 355       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 356       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 357
 358       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 359                             S5_STENCIL_WRITE_ENABLE |
 360                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 361                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 362                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 363                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 364    }
 365
 366    if (depth_stencil->stencil[1].enabled) {
 367       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 368       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 369       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 370       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 371       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 372       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 373
 374       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 375                      BFO_ENABLE_STENCIL_FUNCS |
 376                      BFO_ENABLE_STENCIL_TWO_SIDE |
 377                      BFO_ENABLE_STENCIL_REF |
 378                      BFO_STENCIL_TWO_SIDE |
 379                      (test << BFO_STENCIL_TEST_SHIFT) |
 380                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 381                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 382                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 383
 384       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 385                      BFM_ENABLE_STENCIL_TEST_MASK |
 386                      BFM_ENABLE_STENCIL_WRITE_MASK |
 387                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 388                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 389    }
 390    else {
 391       /* This actually disables two-side stencil: The bit set is a
 392        * modify-enable bit to indicate we are changing the two-side
 393        * setting.  Then there is a symbolic zero to show that we are
 394        * setting the flag to zero/off.
 395        */
 396       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 397                      BFO_ENABLE_STENCIL_TWO_SIDE |
 398                      0);
 399       cso->bfo[1] = 0;
 400    }
 401
 402    if (depth_stencil->depth.enabled) {
 403       int func = i915_translate_compare_func(depth_stencil->depth.func);
 404
 405       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 406                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 407
 408       if (depth_stencil->depth.writemask)
 409          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 410    }
 411
 412    if (depth_stencil->alpha.enabled) {
 413       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 414       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 415
 416       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 417                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 418                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 419    }
 420
 421    return cso;
 422 }
 423
 424 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 425                                           void *depth_stencil)
 426 {
 427    struct i915_context *i915 = i915_context(pipe);
 428    draw_flush(i915->draw);
 429
 430    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 431
 432    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 433 }
 434
 435 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 436                                             void *depth_stencil)
 437 {
 438    FREE(depth_stencil);
 439 }
 440
 441
 442 static void i915_set_scissor_state( struct pipe_context *pipe,
 443                                  const struct pipe_scissor_state *scissor )
 444 {
 445    struct i915_context *i915 = i915_context(pipe);
 446    draw_flush(i915->draw);
 447
 448    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 449    i915->dirty |= I915_NEW_SCISSOR;
 450 }
 451
 452
 453 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 454                                    const struct pipe_poly_stipple *stipple )
 455 {
 456 }
 457
 458
 459
 460 static void *
 461 i915_create_fs_state(struct pipe_context *pipe,
 462                      const struct pipe_shader_state *templ)
 463 {
 464    struct i915_context *i915 = i915_context(pipe);
 465    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 466    if (!ifs)
 467       return NULL;
 468
 469    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
 470    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 471
 472    tgsi_scan_shader(templ->tokens, &ifs->info);
 473
 474    /* The shader's compiled to i915 instructions here */
 475    i915_translate_fragment_program(i915, ifs);
 476
 477    return ifs;
 478 }
 479
 480 static void
 481 i915_fixup_bind_fs_state(struct pipe_context *pipe, void *shader)
 482 {
 483    struct i915_context *i915 = i915_context(pipe);
 484    draw_flush(i915->draw);
 485
 486    i915->saved_fs = shader;
 487
 488    i915->saved_bind_fs_state(pipe, shader);
 489 }
 490
 491 static void
 492 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 493 {
 494    struct i915_context *i915 = i915_context(pipe);
 495    draw_flush(i915->draw);
 496
 497    i915->fs = (struct i915_fragment_shader*) shader;
 498
 499    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 500
 501    i915->dirty |= I915_NEW_FS;
 502 }
 503
 504 static
 505 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 506 {
 507    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 508
 509    if (ifs->program)
 510       FREE(ifs->program);
 511    ifs->program_len = 0;
 512
 513    FREE((struct tgsi_token *)ifs->state.tokens);
 514
 515    FREE(ifs);
 516 }
 517
 518
 519 static void *
 520 i915_create_vs_state(struct pipe_context *pipe,
 521                      const struct pipe_shader_state *templ)
 522 {
 523    struct i915_context *i915 = i915_context(pipe);
 524
 525    /* just pass-through to draw module */
 526    return draw_create_vertex_shader(i915->draw, templ);
 527 }
 528
 529 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 530 {
 531    struct i915_context *i915 = i915_context(pipe);
 532
 533    i915->saved_vs = shader;
 534
 535    /* just pass-through to draw module */
 536    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 537
 538    i915->dirty |= I915_NEW_VS;
 539 }
 540
 541 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 542 {
 543    struct i915_context *i915 = i915_context(pipe);
 544
 545    /* just pass-through to draw module */
 546    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 547 }
 548
 549 static void i915_set_constant_buffer(struct pipe_context *pipe,
 550                                      uint shader, uint index,
 551                                      struct pipe_resource *buf)
 552 {
 553    struct i915_context *i915 = i915_context(pipe);
 554    unsigned new_num = 0;
 555    boolean diff = TRUE;
 556
 557
 558    /* XXX don't support geom shaders now */
 559    if (shader == PIPE_SHADER_GEOMETRY)
 560       return;
 561
 562    /* if we have a new buffer compare it with the old one */
 563    if (buf) {
 564       struct i915_buffer *ibuf = i915_buffer(buf);
 565       struct pipe_resource *old_buf = i915->constants[shader];
 566       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 567       unsigned old_num = i915->current.num_user_constants[shader];
 568
 569       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 570
 571       if (old_num == new_num) {
 572          if (old_num == 0)
 573             diff = FALSE;
 574 #if 0
 575          /* XXX no point in running this code since st/mesa only uses user buffers */
 576          /* Can't compare the buffer data since they are userbuffers */
 577          else if (old && old->free_on_destroy)
 578             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 579 #else
 580          (void)old;
 581 #endif
 582       }
 583    } else {
 584       diff = i915->current.num_user_constants[shader] != 0;
 585    }
 586
 587    /*
 588     * flush before updateing the state.
 589     */
 590    if (diff && shader == PIPE_SHADER_FRAGMENT)
 591       draw_flush(i915->draw);
 592
 593    pipe_resource_reference(&i915->constants[shader], buf);
 594    i915->current.num_user_constants[shader] = new_num;
 595
 596    if (diff)
 597       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 598 }
 599
 600
 601 static void
 602 i915_fixup_set_fragment_sampler_views(struct pipe_context *pipe,
 603                                       unsigned num,
 604                                       struct pipe_sampler_view **views)
 605 {
 606    struct i915_context *i915 = i915_context(pipe);
 607    int i;
 608
 609    for (i = 0; i < num; i++)
 610       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 611                                   views[i]);
 612
 613    for (i = num; i < i915->saved_nr_sampler_views; i++)
 614       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 615                                   NULL);
 616
 617    i915->saved_nr_sampler_views = num;
 618
 619    i915->saved_set_sampler_views(pipe, num, views);
 620 }
 621
 622 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 623                                             unsigned num,
 624                                             struct pipe_sampler_view **views)
 625 {
 626    struct i915_context *i915 = i915_context(pipe);
 627    uint i;
 628
 629    assert(num <= PIPE_MAX_SAMPLERS);
 630
 631    /* Check for no-op */
 632    if (num == i915->num_fragment_sampler_views &&
 633        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 634       return;
 635
 636    /* Fixes wrong texture in texobj with VBUF */
 637    draw_flush(i915->draw);
 638
 639    for (i = 0; i < num; i++)
 640       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 641                                   views[i]);
 642
 643    for (i = num; i < i915->num_fragment_sampler_views; i++)
 644       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 645                                   NULL);
 646
 647    i915->num_fragment_sampler_views = num;
 648
 649    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 650 }
 651
 652
 653 static struct pipe_sampler_view *
 654 i915_create_sampler_view(struct pipe_context *pipe,
 655                          struct pipe_resource *texture,
 656                          const struct pipe_sampler_view *templ)
 657 {
 658    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 659
 660    if (view) {
 661       *view = *templ;
 662       view->reference.count = 1;
 663       view->texture = NULL;
 664       pipe_resource_reference(&view->texture, texture);
 665       view->context = pipe;
 666    }
 667
 668    return view;
 669 }
 670
 671
 672 static void
 673 i915_sampler_view_destroy(struct pipe_context *pipe,
 674                           struct pipe_sampler_view *view)
 675 {
 676    pipe_resource_reference(&view->texture, NULL);
 677    FREE(view);
 678 }
 679
 680
 681 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 682                                        const struct pipe_framebuffer_state *fb)
 683 {
 684    struct i915_context *i915 = i915_context(pipe);
 685    int i;
 686
 687    draw_flush(i915->draw);
 688
 689    i915->framebuffer.width = fb->width;
 690    i915->framebuffer.height = fb->height;
 691    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 692    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 693       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 694                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 695    }
 696    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 697
 698    i915->dirty |= I915_NEW_FRAMEBUFFER;
 699 }
 700
 701
 702
 703 static void i915_set_clip_state( struct pipe_context *pipe,
 704                              const struct pipe_clip_state *clip )
 705 {
 706    struct i915_context *i915 = i915_context(pipe);
 707    draw_flush(i915->draw);
 708
 709    i915->saved_clip = *clip;
 710
 711    draw_set_clip_state(i915->draw, clip);
 712
 713    i915->dirty |= I915_NEW_CLIP;
 714 }
 715
 716
 717
 718 /* Called when driver state tracker notices changes to the viewport
 719  * matrix:
 720  */
 721 static void i915_set_viewport_state( struct pipe_context *pipe,
 722                                      const struct pipe_viewport_state *viewport )
 723 {
 724    struct i915_context *i915 = i915_context(pipe);
 725
 726    i915->viewport = *viewport; /* struct copy */
 727
 728    /* pass the viewport info to the draw module */
 729    draw_set_viewport_state(i915->draw, &i915->viewport);
 730
 731    i915->dirty |= I915_NEW_VIEWPORT;
 732 }
 733
 734
 735 static void *
 736 i915_create_rasterizer_state(struct pipe_context *pipe,
 737                              const struct pipe_rasterizer_state *rasterizer)
 738 {
 739    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 740
 741    cso->templ = *rasterizer;
 742    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 743    cso->light_twoside = rasterizer->light_twoside;
 744    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 745    cso->ds[1].f = rasterizer->offset_scale;
 746    if (rasterizer->poly_stipple_enable) {
 747       cso->st |= ST1_ENABLE;
 748    }
 749
 750    if (rasterizer->scissor)
 751       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 752    else
 753       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 754
 755    switch (rasterizer->cull_face) {
 756    case PIPE_FACE_NONE:
 757       cso->LIS4 |= S4_CULLMODE_NONE;
 758       break;
 759    case PIPE_FACE_FRONT:
 760       if (rasterizer->front_ccw)
 761          cso->LIS4 |= S4_CULLMODE_CCW;
 762       else
 763          cso->LIS4 |= S4_CULLMODE_CW;
 764       break;
 765    case PIPE_FACE_BACK:
 766       if (rasterizer->front_ccw)
 767          cso->LIS4 |= S4_CULLMODE_CW;
 768       else
 769          cso->LIS4 |= S4_CULLMODE_CCW;
 770       break;
 771    case PIPE_FACE_FRONT_AND_BACK:
 772       cso->LIS4 |= S4_CULLMODE_BOTH;
 773       break;
 774    }
 775
 776    {
 777       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 778
 779       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 780
 781       if (rasterizer->line_smooth)
 782          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 783    }
 784
 785    {
 786       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 787
 788       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 789    }
 790
 791    if (rasterizer->flatshade) {
 792       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 793                     S4_FLATSHADE_COLOR |
 794                     S4_FLATSHADE_SPECULAR);
 795    }
 796
 797    cso->LIS7 = fui( rasterizer->offset_units );
 798
 799
 800    return cso;
 801 }
 802
 803 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 804                                         void *raster )
 805 {
 806    struct i915_context *i915 = i915_context(pipe);
 807
 808    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 809
 810    /* pass-through to draw module */
 811    draw_set_rasterizer_state(i915->draw,
 812                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 813                            raster);
 814
 815    i915->dirty |= I915_NEW_RASTERIZER;
 816 }
 817
 818 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 819                                          void *raster)
 820 {
 821    FREE(raster);
 822 }
 823
 824 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 825                                     unsigned count,
 826                                     const struct pipe_vertex_buffer *buffers)
 827 {
 828    struct i915_context *i915 = i915_context(pipe);
 829    struct draw_context *draw = i915->draw;
 830    int i;
 831
 832    util_copy_vertex_buffers(i915->saved_vertex_buffers,
 833                             &i915->saved_nr_vertex_buffers,
 834                             buffers, count);
 835 #if 0
 836    /* XXX doesn't look like this is needed */
 837    /* unmap old */
 838    for (i = 0; i < i915->num_vertex_buffers; i++) {
 839       draw_set_mapped_vertex_buffer(draw, i, NULL);
 840    }
 841 #endif
 842
 843    /* pass-through to draw module */
 844    draw_set_vertex_buffers(draw, count, buffers);
 845
 846    /* map new */
 847    for (i = 0; i < count; i++) {
 848       void *buf = i915_buffer(buffers[i].buffer)->data;
 849       draw_set_mapped_vertex_buffer(draw, i, buf);
 850    }
 851 }
 852
 853 static void *
 854 i915_create_vertex_elements_state(struct pipe_context *pipe,
 855                                   unsigned count,
 856                                   const struct pipe_vertex_element *attribs)
 857 {
 858    struct i915_velems_state *velems;
 859    assert(count <= PIPE_MAX_ATTRIBS);
 860    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 861    if (velems) {
 862       velems->count = count;
 863       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
 864    }
 865    return velems;
 866 }
 867
 868 static void
 869 i915_bind_vertex_elements_state(struct pipe_context *pipe,
 870                                 void *velems)
 871 {
 872    struct i915_context *i915 = i915_context(pipe);
 873    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
 874
 875    i915->saved_velems = velems;
 876
 877    /* pass-through to draw module */
 878    if (i915_velems) {
 879       draw_set_vertex_elements(i915->draw,
 880             i915_velems->count, i915_velems->velem);
 881    }
 882 }
 883
 884 static void
 885 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
 886 {
 887    FREE( velems );
 888 }
 889
 890 static void i915_set_index_buffer(struct pipe_context *pipe,
 891                                   const struct pipe_index_buffer *ib)
 892 {
 893    struct i915_context *i915 = i915_context(pipe);
 894
 895    if (ib)
 896       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
 897    else
 898       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
 899
 900    /* pass-through to draw module */
 901    draw_set_index_buffer(i915->draw, ib);
 902 }
 903
 904 static void
 905 i915_set_sample_mask(struct pipe_context *pipe,
 906                      unsigned sample_mask)
 907 {
 908 }
 909
 910 void
 911 i915_init_state_functions( struct i915_context *i915 )
 912 {
 913    i915->base.create_blend_state = i915_create_blend_state;
 914    i915->base.bind_blend_state = i915_bind_blend_state;
 915    i915->base.delete_blend_state = i915_delete_blend_state;
 916
 917    i915->base.create_sampler_state = i915_create_sampler_state;
 918    i915->base.bind_fragment_sampler_states = i915_bind_sampler_states;
 919    i915->base.delete_sampler_state = i915_delete_sampler_state;
 920
 921    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 922    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 923    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 924
 925    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
 926    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
 927    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
 928    i915->base.create_fs_state = i915_create_fs_state;
 929    i915->base.bind_fs_state = i915_bind_fs_state;
 930    i915->base.delete_fs_state = i915_delete_fs_state;
 931    i915->base.create_vs_state = i915_create_vs_state;
 932    i915->base.bind_vs_state = i915_bind_vs_state;
 933    i915->base.delete_vs_state = i915_delete_vs_state;
 934    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
 935    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
 936    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
 937
 938    i915->base.set_blend_color = i915_set_blend_color;
 939    i915->base.set_stencil_ref = i915_set_stencil_ref;
 940    i915->base.set_clip_state = i915_set_clip_state;
 941    i915->base.set_sample_mask = i915_set_sample_mask;
 942    i915->base.set_constant_buffer = i915_set_constant_buffer;
 943    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
 944
 945    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
 946    i915->base.set_scissor_state = i915_set_scissor_state;
 947    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
 948    i915->base.create_sampler_view = i915_create_sampler_view;
 949    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
 950    i915->base.set_viewport_state = i915_set_viewport_state;
 951    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
 952    i915->base.set_index_buffer = i915_set_index_buffer;
 953    i915->base.redefine_user_buffer = u_default_redefine_user_buffer;
 954 }
 955
 956 void
 957 i915_init_fixup_state_functions( struct i915_context *i915 )
 958 {
 959    i915->saved_bind_fs_state = i915->base.bind_fs_state;
 960    i915->base.bind_fs_state = i915_fixup_bind_fs_state;
 961    i915->saved_bind_sampler_states = i915->base.bind_fragment_sampler_states;
 962    i915->base.bind_fragment_sampler_states = i915_fixup_bind_sampler_states;
 963    i915->saved_set_sampler_views = i915->base.set_fragment_sampler_views;
 964    i915->base.set_fragment_sampler_views = i915_fixup_set_fragment_sampler_views;
 965 }