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    /* XXX here take the target fixup into account */
 150    if ((blend->rt[0].colormask & PIPE_MASK_R) == 0)
 151       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 152
 153    if ((blend->rt[0].colormask & PIPE_MASK_G) == 0)
 154       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 155
 156    if ((blend->rt[0].colormask & PIPE_MASK_B) == 0)
 157       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 158
 159    if ((blend->rt[0].colormask & PIPE_MASK_A) == 0)
 160       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 161
 162    if (blend->rt[0].blend_enable) {
 163       unsigned funcRGB = blend->rt[0].rgb_func;
 164       unsigned srcRGB  = blend->rt[0].rgb_src_factor;
 165       unsigned dstRGB  = blend->rt[0].rgb_dst_factor;
 166
 167       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 168                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 169                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 170                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 171    }
 172
 173    return cso_data;
 174 }
 175
 176 static void i915_bind_blend_state(struct pipe_context *pipe,
 177                                   void *blend)
 178 {
 179    struct i915_context *i915 = i915_context(pipe);
 180    draw_flush(i915->draw);
 181
 182    i915->blend = (struct i915_blend_state*)blend;
 183
 184    i915->dirty |= I915_NEW_BLEND;
 185 }
 186
 187
 188 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 189 {
 190    FREE(blend);
 191 }
 192
 193 static void i915_set_blend_color( struct pipe_context *pipe,
 194                                   const struct pipe_blend_color *blend_color )
 195 {
 196    struct i915_context *i915 = i915_context(pipe);
 197    draw_flush(i915->draw);
 198
 199    i915->blend_color = *blend_color;
 200
 201    i915->dirty |= I915_NEW_BLEND;
 202 }
 203
 204 static void i915_set_stencil_ref( struct pipe_context *pipe,
 205                                   const struct pipe_stencil_ref *stencil_ref )
 206 {
 207    struct i915_context *i915 = i915_context(pipe);
 208    draw_flush(i915->draw);
 209
 210    i915->stencil_ref = *stencil_ref;
 211
 212    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 213 }
 214
 215 static void *
 216 i915_create_sampler_state(struct pipe_context *pipe,
 217                           const struct pipe_sampler_state *sampler)
 218 {
 219    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 220    const unsigned ws = sampler->wrap_s;
 221    const unsigned wt = sampler->wrap_t;
 222    const unsigned wr = sampler->wrap_r;
 223    unsigned minFilt, magFilt;
 224    unsigned mipFilt;
 225
 226    cso->templ = sampler;
 227
 228    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 229    minFilt = translate_img_filter( sampler->min_img_filter );
 230    magFilt = translate_img_filter( sampler->mag_img_filter );
 231
 232    if (sampler->max_anisotropy > 1)
 233       minFilt = magFilt = FILTER_ANISOTROPIC;
 234
 235    if (sampler->max_anisotropy > 2) {
 236       cso->state[0] |= SS2_MAX_ANISO_4;
 237    }
 238
 239    {
 240       int b = (int) (sampler->lod_bias * 16.0);
 241       b = CLAMP(b, -256, 255);
 242       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 243    }
 244
 245    /* Shadow:
 246     */
 247    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 248    {
 249       cso->state[0] |= (SS2_SHADOW_ENABLE |
 250                         i915_translate_shadow_compare_func(sampler->compare_func));
 251
 252       minFilt = FILTER_4X4_FLAT;
 253       magFilt = FILTER_4X4_FLAT;
 254    }
 255
 256    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 257                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 258                      (magFilt << SS2_MAG_FILTER_SHIFT));
 259
 260    cso->state[1] |=
 261       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 262        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 263        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 264
 265    if (sampler->normalized_coords)
 266       cso->state[1] |= SS3_NORMALIZED_COORDS;
 267
 268    {
 269       int minlod = (int) (16.0 * sampler->min_lod);
 270       int maxlod = (int) (16.0 * sampler->max_lod);
 271       minlod = CLAMP(minlod, 0, 16 * 11);
 272       maxlod = CLAMP(maxlod, 0, 16 * 11);
 273
 274       if (minlod > maxlod)
 275          maxlod = minlod;
 276
 277       cso->minlod = minlod;
 278       cso->maxlod = maxlod;
 279    }
 280
 281    {
 282       ubyte r = float_to_ubyte(sampler->border_color.f[0]);
 283       ubyte g = float_to_ubyte(sampler->border_color.f[1]);
 284       ubyte b = float_to_ubyte(sampler->border_color.f[2]);
 285       ubyte a = float_to_ubyte(sampler->border_color.f[3]);
 286       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 287    }
 288    return cso;
 289 }
 290
 291 static void i915_fixup_bind_sampler_states(struct pipe_context *pipe,
 292                                            unsigned num, void **sampler)
 293 {
 294    struct i915_context *i915 = i915_context(pipe);
 295
 296    i915->saved_nr_samplers = num;
 297    memcpy(&i915->saved_samplers, sampler, sizeof(void *) * num);
 298
 299    i915->saved_bind_sampler_states(pipe, num, sampler);
 300 }
 301
 302 static void i915_bind_sampler_states(struct pipe_context *pipe,
 303                                      unsigned num, void **sampler)
 304 {
 305    struct i915_context *i915 = i915_context(pipe);
 306    unsigned i;
 307
 308    /* Check for no-op */
 309    if (num == i915->num_samplers &&
 310        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 311       return;
 312
 313    draw_flush(i915->draw);
 314
 315    for (i = 0; i < num; ++i)
 316       i915->sampler[i] = sampler[i];
 317    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 318       i915->sampler[i] = NULL;
 319
 320    i915->num_samplers = num;
 321
 322    i915->dirty |= I915_NEW_SAMPLER;
 323 }
 324
 325 static void i915_delete_sampler_state(struct pipe_context *pipe,
 326                                       void *sampler)
 327 {
 328    FREE(sampler);
 329 }
 330
 331
 332 /** XXX move someday?  Or consolidate all these simple state setters
 333  * into one file.
 334  */
 335
 336 static void *
 337 i915_create_depth_stencil_state(struct pipe_context *pipe,
 338                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 339 {
 340    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 341
 342    {
 343       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 344       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 345
 346       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 347                               ENABLE_STENCIL_TEST_MASK |
 348                               STENCIL_TEST_MASK(testmask) |
 349                               ENABLE_STENCIL_WRITE_MASK |
 350                               STENCIL_WRITE_MASK(writemask));
 351    }
 352
 353    if (depth_stencil->stencil[0].enabled) {
 354       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 355       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 356       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 357       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 358
 359       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 360                             S5_STENCIL_WRITE_ENABLE |
 361                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 362                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 363                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 364                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 365    }
 366
 367    if (depth_stencil->stencil[1].enabled) {
 368       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 369       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 370       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 371       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 372       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 373       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 374
 375       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 376                      BFO_ENABLE_STENCIL_FUNCS |
 377                      BFO_ENABLE_STENCIL_TWO_SIDE |
 378                      BFO_ENABLE_STENCIL_REF |
 379                      BFO_STENCIL_TWO_SIDE |
 380                      (test << BFO_STENCIL_TEST_SHIFT) |
 381                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 382                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 383                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 384
 385       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 386                      BFM_ENABLE_STENCIL_TEST_MASK |
 387                      BFM_ENABLE_STENCIL_WRITE_MASK |
 388                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 389                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 390    }
 391    else {
 392       /* This actually disables two-side stencil: The bit set is a
 393        * modify-enable bit to indicate we are changing the two-side
 394        * setting.  Then there is a symbolic zero to show that we are
 395        * setting the flag to zero/off.
 396        */
 397       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 398                      BFO_ENABLE_STENCIL_TWO_SIDE |
 399                      0);
 400       cso->bfo[1] = 0;
 401    }
 402
 403    if (depth_stencil->depth.enabled) {
 404       int func = i915_translate_compare_func(depth_stencil->depth.func);
 405
 406       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 407                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 408
 409       if (depth_stencil->depth.writemask)
 410          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 411    }
 412
 413    if (depth_stencil->alpha.enabled) {
 414       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 415       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 416
 417       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 418                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 419                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 420    }
 421
 422    return cso;
 423 }
 424
 425 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 426                                           void *depth_stencil)
 427 {
 428    struct i915_context *i915 = i915_context(pipe);
 429    draw_flush(i915->draw);
 430
 431    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 432
 433    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 434 }
 435
 436 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 437                                             void *depth_stencil)
 438 {
 439    FREE(depth_stencil);
 440 }
 441
 442
 443 static void i915_set_scissor_state( struct pipe_context *pipe,
 444                                  const struct pipe_scissor_state *scissor )
 445 {
 446    struct i915_context *i915 = i915_context(pipe);
 447    draw_flush(i915->draw);
 448
 449    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 450    i915->dirty |= I915_NEW_SCISSOR;
 451 }
 452
 453
 454 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 455                                    const struct pipe_poly_stipple *stipple )
 456 {
 457 }
 458
 459
 460
 461 static void *
 462 i915_create_fs_state(struct pipe_context *pipe,
 463                      const struct pipe_shader_state *templ)
 464 {
 465    struct i915_context *i915 = i915_context(pipe);
 466    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 467    if (!ifs)
 468       return NULL;
 469
 470    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
 471    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 472
 473    tgsi_scan_shader(templ->tokens, &ifs->info);
 474
 475    /* The shader's compiled to i915 instructions here */
 476    i915_translate_fragment_program(i915, ifs);
 477
 478    return ifs;
 479 }
 480
 481 static void
 482 i915_fixup_bind_fs_state(struct pipe_context *pipe, void *shader)
 483 {
 484    struct i915_context *i915 = i915_context(pipe);
 485    draw_flush(i915->draw);
 486
 487    i915->saved_fs = shader;
 488
 489    i915->saved_bind_fs_state(pipe, shader);
 490 }
 491
 492 static void
 493 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 494 {
 495    struct i915_context *i915 = i915_context(pipe);
 496    draw_flush(i915->draw);
 497
 498    i915->fs = (struct i915_fragment_shader*) shader;
 499
 500    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 501
 502    i915->dirty |= I915_NEW_FS;
 503 }
 504
 505 static
 506 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 507 {
 508    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 509
 510    if (ifs->program) {
 511       FREE(ifs->program);
 512       ifs->program = NULL;
 513       FREE((struct tgsi_token *)ifs->state.tokens);
 514       ifs->state.tokens = NULL;
 515    }
 516    ifs->program_len = 0;
 517
 518    FREE(ifs);
 519 }
 520
 521
 522 static void *
 523 i915_create_vs_state(struct pipe_context *pipe,
 524                      const struct pipe_shader_state *templ)
 525 {
 526    struct i915_context *i915 = i915_context(pipe);
 527
 528    /* just pass-through to draw module */
 529    return draw_create_vertex_shader(i915->draw, templ);
 530 }
 531
 532 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 533 {
 534    struct i915_context *i915 = i915_context(pipe);
 535
 536    i915->saved_vs = shader;
 537
 538    /* just pass-through to draw module */
 539    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 540
 541    i915->dirty |= I915_NEW_VS;
 542 }
 543
 544 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 545 {
 546    struct i915_context *i915 = i915_context(pipe);
 547
 548    /* just pass-through to draw module */
 549    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 550 }
 551
 552 static void i915_set_constant_buffer(struct pipe_context *pipe,
 553                                      uint shader, uint index,
 554                                      struct pipe_resource *buf)
 555 {
 556    struct i915_context *i915 = i915_context(pipe);
 557    unsigned new_num = 0;
 558    boolean diff = TRUE;
 559
 560
 561    /* XXX don't support geom shaders now */
 562    if (shader == PIPE_SHADER_GEOMETRY)
 563       return;
 564
 565    /* if we have a new buffer compare it with the old one */
 566    if (buf) {
 567       struct i915_buffer *ibuf = i915_buffer(buf);
 568       struct pipe_resource *old_buf = i915->constants[shader];
 569       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 570       unsigned old_num = i915->current.num_user_constants[shader];
 571
 572       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 573
 574       if (old_num == new_num) {
 575          if (old_num == 0)
 576             diff = FALSE;
 577 #if 0
 578          /* XXX no point in running this code since st/mesa only uses user buffers */
 579          /* Can't compare the buffer data since they are userbuffers */
 580          else if (old && old->free_on_destroy)
 581             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 582 #else
 583          (void)old;
 584 #endif
 585       }
 586    } else {
 587       diff = i915->current.num_user_constants[shader] != 0;
 588    }
 589
 590    /*
 591     * flush before updateing the state.
 592     */
 593    if (diff && shader == PIPE_SHADER_FRAGMENT)
 594       draw_flush(i915->draw);
 595
 596    pipe_resource_reference(&i915->constants[shader], buf);
 597    i915->current.num_user_constants[shader] = new_num;
 598
 599    if (diff)
 600       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 601 }
 602
 603
 604 static void
 605 i915_fixup_set_fragment_sampler_views(struct pipe_context *pipe,
 606                                       unsigned num,
 607                                       struct pipe_sampler_view **views)
 608 {
 609    struct i915_context *i915 = i915_context(pipe);
 610    int i;
 611
 612    for (i = 0; i < num; i++)
 613       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 614                                   views[i]);
 615
 616    for (i = num; i < i915->saved_nr_sampler_views; i++)
 617       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 618                                   NULL);
 619
 620    i915->saved_nr_sampler_views = num;
 621
 622    i915->saved_set_sampler_views(pipe, num, views);
 623 }
 624
 625 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 626                                             unsigned num,
 627                                             struct pipe_sampler_view **views)
 628 {
 629    struct i915_context *i915 = i915_context(pipe);
 630    uint i;
 631
 632    assert(num <= PIPE_MAX_SAMPLERS);
 633
 634    /* Check for no-op */
 635    if (num == i915->num_fragment_sampler_views &&
 636        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 637       return;
 638
 639    /* Fixes wrong texture in texobj with VBUF */
 640    draw_flush(i915->draw);
 641
 642    for (i = 0; i < num; i++)
 643       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 644                                   views[i]);
 645
 646    for (i = num; i < i915->num_fragment_sampler_views; i++)
 647       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 648                                   NULL);
 649
 650    i915->num_fragment_sampler_views = num;
 651
 652    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 653 }
 654
 655
 656 static struct pipe_sampler_view *
 657 i915_create_sampler_view(struct pipe_context *pipe,
 658                          struct pipe_resource *texture,
 659                          const struct pipe_sampler_view *templ)
 660 {
 661    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 662
 663    if (view) {
 664       *view = *templ;
 665       view->reference.count = 1;
 666       view->texture = NULL;
 667       pipe_resource_reference(&view->texture, texture);
 668       view->context = pipe;
 669    }
 670
 671    return view;
 672 }
 673
 674
 675 static void
 676 i915_sampler_view_destroy(struct pipe_context *pipe,
 677                           struct pipe_sampler_view *view)
 678 {
 679    pipe_resource_reference(&view->texture, NULL);
 680    FREE(view);
 681 }
 682
 683
 684 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 685                                        const struct pipe_framebuffer_state *fb)
 686 {
 687    struct i915_context *i915 = i915_context(pipe);
 688    int i;
 689
 690    draw_flush(i915->draw);
 691
 692    i915->framebuffer.width = fb->width;
 693    i915->framebuffer.height = fb->height;
 694    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 695    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 696       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 697                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 698    }
 699    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 700
 701    i915->dirty |= I915_NEW_FRAMEBUFFER;
 702 }
 703
 704
 705
 706 static void i915_set_clip_state( struct pipe_context *pipe,
 707                              const struct pipe_clip_state *clip )
 708 {
 709    struct i915_context *i915 = i915_context(pipe);
 710    draw_flush(i915->draw);
 711
 712    i915->saved_clip = *clip;
 713
 714    draw_set_clip_state(i915->draw, clip);
 715
 716    i915->dirty |= I915_NEW_CLIP;
 717 }
 718
 719
 720
 721 /* Called when driver state tracker notices changes to the viewport
 722  * matrix:
 723  */
 724 static void i915_set_viewport_state( struct pipe_context *pipe,
 725                                      const struct pipe_viewport_state *viewport )
 726 {
 727    struct i915_context *i915 = i915_context(pipe);
 728
 729    i915->viewport = *viewport; /* struct copy */
 730
 731    /* pass the viewport info to the draw module */
 732    draw_set_viewport_state(i915->draw, &i915->viewport);
 733
 734    i915->dirty |= I915_NEW_VIEWPORT;
 735 }
 736
 737
 738 static void *
 739 i915_create_rasterizer_state(struct pipe_context *pipe,
 740                              const struct pipe_rasterizer_state *rasterizer)
 741 {
 742    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 743
 744    cso->templ = *rasterizer;
 745    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 746    cso->light_twoside = rasterizer->light_twoside;
 747    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 748    cso->ds[1].f = rasterizer->offset_scale;
 749    if (rasterizer->poly_stipple_enable) {
 750       cso->st |= ST1_ENABLE;
 751    }
 752
 753    if (rasterizer->scissor)
 754       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 755    else
 756       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 757
 758    switch (rasterizer->cull_face) {
 759    case PIPE_FACE_NONE:
 760       cso->LIS4 |= S4_CULLMODE_NONE;
 761       break;
 762    case PIPE_FACE_FRONT:
 763       if (rasterizer->front_ccw)
 764          cso->LIS4 |= S4_CULLMODE_CCW;
 765       else
 766          cso->LIS4 |= S4_CULLMODE_CW;
 767       break;
 768    case PIPE_FACE_BACK:
 769       if (rasterizer->front_ccw)
 770          cso->LIS4 |= S4_CULLMODE_CW;
 771       else
 772          cso->LIS4 |= S4_CULLMODE_CCW;
 773       break;
 774    case PIPE_FACE_FRONT_AND_BACK:
 775       cso->LIS4 |= S4_CULLMODE_BOTH;
 776       break;
 777    }
 778
 779    {
 780       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 781
 782       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 783
 784       if (rasterizer->line_smooth)
 785          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 786    }
 787
 788    {
 789       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 790
 791       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 792    }
 793
 794    if (rasterizer->flatshade) {
 795       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 796                     S4_FLATSHADE_COLOR |
 797                     S4_FLATSHADE_SPECULAR);
 798    }
 799
 800    cso->LIS7 = fui( rasterizer->offset_units );
 801
 802
 803    return cso;
 804 }
 805
 806 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 807                                         void *raster )
 808 {
 809    struct i915_context *i915 = i915_context(pipe);
 810
 811    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 812
 813    /* pass-through to draw module */
 814    draw_set_rasterizer_state(i915->draw,
 815                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 816                            raster);
 817
 818    i915->dirty |= I915_NEW_RASTERIZER;
 819 }
 820
 821 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 822                                          void *raster)
 823 {
 824    FREE(raster);
 825 }
 826
 827 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 828                                     unsigned count,
 829                                     const struct pipe_vertex_buffer *buffers)
 830 {
 831    struct i915_context *i915 = i915_context(pipe);
 832    struct draw_context *draw = i915->draw;
 833    int i;
 834
 835    util_copy_vertex_buffers(i915->saved_vertex_buffers,
 836                             &i915->saved_nr_vertex_buffers,
 837                             buffers, count);
 838 #if 0
 839    /* XXX doesn't look like this is needed */
 840    /* unmap old */
 841    for (i = 0; i < i915->num_vertex_buffers; i++) {
 842       draw_set_mapped_vertex_buffer(draw, i, NULL);
 843    }
 844 #endif
 845
 846    /* pass-through to draw module */
 847    draw_set_vertex_buffers(draw, count, buffers);
 848
 849    /* map new */
 850    for (i = 0; i < count; i++) {
 851       void *buf = i915_buffer(buffers[i].buffer)->data;
 852       draw_set_mapped_vertex_buffer(draw, i, buf);
 853    }
 854 }
 855
 856 static void *
 857 i915_create_vertex_elements_state(struct pipe_context *pipe,
 858                                   unsigned count,
 859                                   const struct pipe_vertex_element *attribs)
 860 {
 861    struct i915_velems_state *velems;
 862    assert(count <= PIPE_MAX_ATTRIBS);
 863    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 864    if (velems) {
 865       velems->count = count;
 866       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
 867    }
 868    return velems;
 869 }
 870
 871 static void
 872 i915_bind_vertex_elements_state(struct pipe_context *pipe,
 873                                 void *velems)
 874 {
 875    struct i915_context *i915 = i915_context(pipe);
 876    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
 877
 878    i915->saved_velems = velems;
 879
 880    /* pass-through to draw module */
 881    if (i915_velems) {
 882       draw_set_vertex_elements(i915->draw,
 883             i915_velems->count, i915_velems->velem);
 884    }
 885 }
 886
 887 static void
 888 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
 889 {
 890    FREE( velems );
 891 }
 892
 893 static void i915_set_index_buffer(struct pipe_context *pipe,
 894                                   const struct pipe_index_buffer *ib)
 895 {
 896    struct i915_context *i915 = i915_context(pipe);
 897
 898    if (ib)
 899       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
 900    else
 901       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
 902
 903    /* pass-through to draw module */
 904    draw_set_index_buffer(i915->draw, ib);
 905 }
 906
 907 static void
 908 i915_set_sample_mask(struct pipe_context *pipe,
 909                      unsigned sample_mask)
 910 {
 911 }
 912
 913 void
 914 i915_init_state_functions( struct i915_context *i915 )
 915 {
 916    i915->base.create_blend_state = i915_create_blend_state;
 917    i915->base.bind_blend_state = i915_bind_blend_state;
 918    i915->base.delete_blend_state = i915_delete_blend_state;
 919
 920    i915->base.create_sampler_state = i915_create_sampler_state;
 921    i915->base.bind_fragment_sampler_states = i915_bind_sampler_states;
 922    i915->base.delete_sampler_state = i915_delete_sampler_state;
 923
 924    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 925    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 926    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 927
 928    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
 929    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
 930    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
 931    i915->base.create_fs_state = i915_create_fs_state;
 932    i915->base.bind_fs_state = i915_bind_fs_state;
 933    i915->base.delete_fs_state = i915_delete_fs_state;
 934    i915->base.create_vs_state = i915_create_vs_state;
 935    i915->base.bind_vs_state = i915_bind_vs_state;
 936    i915->base.delete_vs_state = i915_delete_vs_state;
 937    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
 938    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
 939    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
 940
 941    i915->base.set_blend_color = i915_set_blend_color;
 942    i915->base.set_stencil_ref = i915_set_stencil_ref;
 943    i915->base.set_clip_state = i915_set_clip_state;
 944    i915->base.set_sample_mask = i915_set_sample_mask;
 945    i915->base.set_constant_buffer = i915_set_constant_buffer;
 946    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
 947
 948    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
 949    i915->base.set_scissor_state = i915_set_scissor_state;
 950    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
 951    i915->base.create_sampler_view = i915_create_sampler_view;
 952    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
 953    i915->base.set_viewport_state = i915_set_viewport_state;
 954    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
 955    i915->base.set_index_buffer = i915_set_index_buffer;
 956    i915->base.redefine_user_buffer = u_default_redefine_user_buffer;
 957 }
 958
 959 void
 960 i915_init_fixup_state_functions( struct i915_context *i915 )
 961 {
 962    i915->saved_bind_fs_state = i915->base.bind_fs_state;
 963    i915->base.bind_fs_state = i915_fixup_bind_fs_state;
 964    i915->saved_bind_sampler_states = i915->base.bind_fragment_sampler_states;
 965    i915->base.bind_fragment_sampler_states = i915_fixup_bind_sampler_states;
 966    i915->saved_set_sampler_views = i915->base.set_fragment_sampler_views;
 967    i915->base.set_fragment_sampler_views = i915_fixup_set_fragment_sampler_views;
 968 }