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 "tgsi/tgsi_parse.h"
  37
  38 #include "i915_context.h"
  39 #include "i915_reg.h"
  40 #include "i915_state_inlines.h"
  41 #include "i915_fpc.h"
  42 #include "i915_resource.h"
  43
  44 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  45  * Intel drivers for "other operating systems" implement GL_CLAMP as
  46  * GL_CLAMP_TO_EDGE, so the same is done here.
  47  */
  48 static unsigned
  49 translate_wrap_mode(unsigned wrap)
  50 {
  51    switch (wrap) {
  52    case PIPE_TEX_WRAP_REPEAT:
  53       return TEXCOORDMODE_WRAP;
  54    case PIPE_TEX_WRAP_CLAMP:
  55       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  56    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  57       return TEXCOORDMODE_CLAMP_EDGE;
  58    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  59       return TEXCOORDMODE_CLAMP_BORDER;
  60    /*
  61    case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  62       return TEXCOORDMODE_MIRROR;
  63     */
  64    default:
  65       return TEXCOORDMODE_WRAP;
  66    }
  67 }
  68
  69 static unsigned translate_img_filter( unsigned filter )
  70 {
  71    switch (filter) {
  72    case PIPE_TEX_FILTER_NEAREST:
  73       return FILTER_NEAREST;
  74    case PIPE_TEX_FILTER_LINEAR:
  75       return FILTER_LINEAR;
  76    default:
  77       assert(0);
  78       return FILTER_NEAREST;
  79    }
  80 }
  81
  82 static unsigned translate_mip_filter( unsigned filter )
  83 {
  84    switch (filter) {
  85    case PIPE_TEX_MIPFILTER_NONE:
  86       return MIPFILTER_NONE;
  87    case PIPE_TEX_MIPFILTER_NEAREST:
  88       return MIPFILTER_NEAREST;
  89    case PIPE_TEX_MIPFILTER_LINEAR:
  90       return MIPFILTER_LINEAR;
  91    default:
  92       assert(0);
  93       return MIPFILTER_NONE;
  94    }
  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    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_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[0]);
 283       ubyte g = float_to_ubyte(sampler->border_color[1]);
 284       ubyte b = float_to_ubyte(sampler->border_color[2]);
 285       ubyte a = float_to_ubyte(sampler->border_color[3]);
 286       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 287    }
 288    return cso;
 289 }
 290
 291 static void i915_bind_sampler_states(struct pipe_context *pipe,
 292                                      unsigned num, void **sampler)
 293 {
 294    struct i915_context *i915 = i915_context(pipe);
 295    unsigned i;
 296
 297    /* Check for no-op */
 298    if (num == i915->num_samplers &&
 299        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 300       return;
 301
 302    draw_flush(i915->draw);
 303
 304    for (i = 0; i < num; ++i)
 305       i915->sampler[i] = sampler[i];
 306    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 307       i915->sampler[i] = NULL;
 308
 309    i915->num_samplers = num;
 310
 311    i915->dirty |= I915_NEW_SAMPLER;
 312 }
 313
 314 static void i915_delete_sampler_state(struct pipe_context *pipe,
 315                                       void *sampler)
 316 {
 317    FREE(sampler);
 318 }
 319
 320
 321 /** XXX move someday?  Or consolidate all these simple state setters
 322  * into one file.
 323  */
 324
 325 static void *
 326 i915_create_depth_stencil_state(struct pipe_context *pipe,
 327                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 328 {
 329    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 330
 331    {
 332       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 333       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 334
 335       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 336                               ENABLE_STENCIL_TEST_MASK |
 337                               STENCIL_TEST_MASK(testmask) |
 338                               ENABLE_STENCIL_WRITE_MASK |
 339                               STENCIL_WRITE_MASK(writemask));
 340    }
 341
 342    if (depth_stencil->stencil[0].enabled) {
 343       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 344       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 345       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 346       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 347
 348       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 349                             S5_STENCIL_WRITE_ENABLE |
 350                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 351                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 352                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 353                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 354    }
 355
 356    if (depth_stencil->stencil[1].enabled) {
 357       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 358       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 359       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 360       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 361       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 362       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 363
 364       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 365                      BFO_ENABLE_STENCIL_FUNCS |
 366                      BFO_ENABLE_STENCIL_TWO_SIDE |
 367                      BFO_ENABLE_STENCIL_REF |
 368                      BFO_STENCIL_TWO_SIDE |
 369                      (test << BFO_STENCIL_TEST_SHIFT) |
 370                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 371                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 372                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 373
 374       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 375                      BFM_ENABLE_STENCIL_TEST_MASK |
 376                      BFM_ENABLE_STENCIL_WRITE_MASK |
 377                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 378                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 379    }
 380    else {
 381       /* This actually disables two-side stencil: The bit set is a
 382        * modify-enable bit to indicate we are changing the two-side
 383        * setting.  Then there is a symbolic zero to show that we are
 384        * setting the flag to zero/off.
 385        */
 386       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 387                      BFO_ENABLE_STENCIL_TWO_SIDE |
 388                      0);
 389       cso->bfo[1] = 0;
 390    }
 391
 392    if (depth_stencil->depth.enabled) {
 393       int func = i915_translate_compare_func(depth_stencil->depth.func);
 394
 395       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 396                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 397
 398       if (depth_stencil->depth.writemask)
 399          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 400    }
 401
 402    if (depth_stencil->alpha.enabled) {
 403       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 404       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 405
 406       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 407                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 408                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 409    }
 410
 411    return cso;
 412 }
 413
 414 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 415                                           void *depth_stencil)
 416 {
 417    struct i915_context *i915 = i915_context(pipe);
 418    draw_flush(i915->draw);
 419
 420    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 421
 422    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 423 }
 424
 425 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 426                                             void *depth_stencil)
 427 {
 428    FREE(depth_stencil);
 429 }
 430
 431
 432 static void i915_set_scissor_state( struct pipe_context *pipe,
 433                                  const struct pipe_scissor_state *scissor )
 434 {
 435    struct i915_context *i915 = i915_context(pipe);
 436    draw_flush(i915->draw);
 437
 438    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 439    i915->dirty |= I915_NEW_SCISSOR;
 440 }
 441
 442
 443 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 444                                    const struct pipe_poly_stipple *stipple )
 445 {
 446 }
 447
 448
 449
 450 static void *
 451 i915_create_fs_state(struct pipe_context *pipe,
 452                      const struct pipe_shader_state *templ)
 453 {
 454    struct i915_context *i915 = i915_context(pipe);
 455    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 456    if (!ifs)
 457       return NULL;
 458
 459    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 460
 461    tgsi_scan_shader(templ->tokens, &ifs->info);
 462
 463    /* The shader's compiled to i915 instructions here */
 464    i915_translate_fragment_program(i915, ifs);
 465
 466    return ifs;
 467 }
 468
 469 static void
 470 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 471 {
 472    struct i915_context *i915 = i915_context(pipe);
 473    draw_flush(i915->draw);
 474
 475    i915->fs = (struct i915_fragment_shader*) shader;
 476
 477    i915->dirty |= I915_NEW_FS;
 478 }
 479
 480 static
 481 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 482 {
 483    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 484
 485    if (ifs->program)
 486       FREE(ifs->program);
 487    ifs->program_len = 0;
 488
 489    FREE((struct tgsi_token *)ifs->state.tokens);
 490
 491    FREE(ifs);
 492 }
 493
 494
 495 static void *
 496 i915_create_vs_state(struct pipe_context *pipe,
 497                      const struct pipe_shader_state *templ)
 498 {
 499    struct i915_context *i915 = i915_context(pipe);
 500
 501    /* just pass-through to draw module */
 502    return draw_create_vertex_shader(i915->draw, templ);
 503 }
 504
 505 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 506 {
 507    struct i915_context *i915 = i915_context(pipe);
 508
 509    /* just pass-through to draw module */
 510    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 511
 512    i915->dirty |= I915_NEW_VS;
 513 }
 514
 515 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 516 {
 517    struct i915_context *i915 = i915_context(pipe);
 518
 519    /* just pass-through to draw module */
 520    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 521 }
 522
 523 static void i915_set_constant_buffer(struct pipe_context *pipe,
 524                                      uint shader, uint index,
 525                                      struct pipe_resource *buf)
 526 {
 527    struct i915_context *i915 = i915_context(pipe);
 528    draw_flush(i915->draw);
 529
 530    /* Make a copy of shader constants.
 531     * During fragment program translation we may add additional
 532     * constants to the array.
 533     *
 534     * We want to consider the situation where some user constants
 535     * (ex: a material color) may change frequently but the shader program
 536     * stays the same.  In that case we should only be updating the first
 537     * N constants, leaving any extras from shader translation alone.
 538     */
 539    if (buf) {
 540       struct i915_buffer *ir = i915_buffer(buf);
 541       memcpy(i915->current.constants[shader], ir->data, ir->b.b.width0);
 542       i915->current.num_user_constants[shader] = (ir->b.b.width0 /
 543                                                   4 * sizeof(float));
 544    }
 545    else {
 546       i915->current.num_user_constants[shader] = 0;
 547    }
 548
 549
 550    i915->dirty |= I915_NEW_CONSTANTS;
 551 }
 552
 553
 554 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 555                                             unsigned num,
 556                                             struct pipe_sampler_view **views)
 557 {
 558    struct i915_context *i915 = i915_context(pipe);
 559    uint i;
 560
 561    assert(num <= PIPE_MAX_SAMPLERS);
 562
 563    /* Check for no-op */
 564    if (num == i915->num_fragment_sampler_views &&
 565        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 566       return;
 567
 568    /* Fixes wrong texture in texobj with VBUF */
 569    draw_flush(i915->draw);
 570
 571    for (i = 0; i < num; i++)
 572       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 573                                   views[i]);
 574
 575    for (i = num; i < i915->num_fragment_sampler_views; i++)
 576       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 577                                   NULL);
 578
 579    i915->num_fragment_sampler_views = num;
 580
 581    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 582 }
 583
 584
 585 static struct pipe_sampler_view *
 586 i915_create_sampler_view(struct pipe_context *pipe,
 587                          struct pipe_resource *texture,
 588                          const struct pipe_sampler_view *templ)
 589 {
 590    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 591
 592    if (view) {
 593       *view = *templ;
 594       view->reference.count = 1;
 595       view->texture = NULL;
 596       pipe_resource_reference(&view->texture, texture);
 597       view->context = pipe;
 598    }
 599
 600    return view;
 601 }
 602
 603
 604 static void
 605 i915_sampler_view_destroy(struct pipe_context *pipe,
 606                           struct pipe_sampler_view *view)
 607 {
 608    pipe_resource_reference(&view->texture, NULL);
 609    FREE(view);
 610 }
 611
 612
 613 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 614                                        const struct pipe_framebuffer_state *fb)
 615 {
 616    struct i915_context *i915 = i915_context(pipe);
 617    int i;
 618
 619    draw_flush(i915->draw);
 620
 621    i915->framebuffer.width = fb->width;
 622    i915->framebuffer.height = fb->height;
 623    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 624    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 625       pipe_surface_reference(&i915->framebuffer.cbufs[i], fb->cbufs[i]);
 626    }
 627    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 628
 629    i915->dirty |= I915_NEW_FRAMEBUFFER;
 630 }
 631
 632
 633
 634 static void i915_set_clip_state( struct pipe_context *pipe,
 635                              const struct pipe_clip_state *clip )
 636 {
 637    struct i915_context *i915 = i915_context(pipe);
 638    draw_flush(i915->draw);
 639
 640    draw_set_clip_state(i915->draw, clip);
 641
 642    i915->dirty |= I915_NEW_CLIP;
 643 }
 644
 645
 646
 647 /* Called when driver state tracker notices changes to the viewport
 648  * matrix:
 649  */
 650 static void i915_set_viewport_state( struct pipe_context *pipe,
 651                                      const struct pipe_viewport_state *viewport )
 652 {
 653    struct i915_context *i915 = i915_context(pipe);
 654
 655    i915->viewport = *viewport; /* struct copy */
 656
 657    /* pass the viewport info to the draw module */
 658    draw_set_viewport_state(i915->draw, &i915->viewport);
 659
 660    i915->dirty |= I915_NEW_VIEWPORT;
 661 }
 662
 663
 664 static void *
 665 i915_create_rasterizer_state(struct pipe_context *pipe,
 666                              const struct pipe_rasterizer_state *rasterizer)
 667 {
 668    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 669
 670    cso->templ = rasterizer;
 671    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 672    cso->light_twoside = rasterizer->light_twoside;
 673    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 674    cso->ds[1].f = rasterizer->offset_scale;
 675    if (rasterizer->poly_stipple_enable) {
 676       cso->st |= ST1_ENABLE;
 677    }
 678
 679    if (rasterizer->scissor)
 680       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 681    else
 682       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 683
 684    switch (rasterizer->cull_face) {
 685    case PIPE_FACE_NONE:
 686       cso->LIS4 |= S4_CULLMODE_NONE;
 687       break;
 688    case PIPE_FACE_FRONT:
 689       if (rasterizer->front_ccw)
 690          cso->LIS4 |= S4_CULLMODE_CCW;
 691       else
 692          cso->LIS4 |= S4_CULLMODE_CW;
 693       break;
 694    case PIPE_FACE_BACK:
 695       if (rasterizer->front_ccw)
 696          cso->LIS4 |= S4_CULLMODE_CW;
 697       else
 698          cso->LIS4 |= S4_CULLMODE_CCW;
 699       break;
 700    case PIPE_FACE_FRONT_AND_BACK:
 701       cso->LIS4 |= S4_CULLMODE_BOTH;
 702       break;
 703    }
 704
 705    {
 706       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 707
 708       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 709
 710       if (rasterizer->line_smooth)
 711          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 712    }
 713
 714    {
 715       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 716
 717       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 718    }
 719
 720    if (rasterizer->flatshade) {
 721       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 722                     S4_FLATSHADE_COLOR |
 723                     S4_FLATSHADE_SPECULAR);
 724    }
 725
 726    cso->LIS7 = fui( rasterizer->offset_units );
 727
 728
 729    return cso;
 730 }
 731
 732 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 733                                         void *raster )
 734 {
 735    struct i915_context *i915 = i915_context(pipe);
 736
 737    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 738
 739    /* pass-through to draw module */
 740    draw_set_rasterizer_state(i915->draw,
 741                            (i915->rasterizer ? i915->rasterizer->templ : NULL),
 742                            raster);
 743
 744    i915->dirty |= I915_NEW_RASTERIZER;
 745 }
 746
 747 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 748                                          void *raster)
 749 {
 750    FREE(raster);
 751 }
 752
 753 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 754                                     unsigned count,
 755                                     const struct pipe_vertex_buffer *buffers)
 756 {
 757    struct i915_context *i915 = i915_context(pipe);
 758    /* Because we change state before the draw_set_vertex_buffers call
 759     * we need a flush here, just to be sure.
 760     */
 761    draw_flush(i915->draw);
 762
 763    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 764    i915->num_vertex_buffers = count;
 765
 766    /* pass-through to draw module */
 767    draw_set_vertex_buffers(i915->draw, count, buffers);
 768 }
 769
 770 static void *
 771 i915_create_vertex_elements_state(struct pipe_context *pipe,
 772                                   unsigned count,
 773                                   const struct pipe_vertex_element *attribs)
 774 {
 775    struct i915_velems_state *velems;
 776    assert(count <= PIPE_MAX_ATTRIBS);
 777    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 778    if (velems) {
 779       velems->count = count;
 780       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
 781    }
 782    return velems;
 783 }
 784
 785 static void
 786 i915_bind_vertex_elements_state(struct pipe_context *pipe,
 787                                 void *velems)
 788 {
 789    struct i915_context *i915 = i915_context(pipe);
 790    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
 791
 792    /* Because we change state before the draw_set_vertex_buffers call
 793     * we need a flush here, just to be sure.
 794     */
 795    draw_flush(i915->draw);
 796
 797    /* pass-through to draw module */
 798    if (i915_velems) {
 799       draw_set_vertex_elements(i915->draw,
 800             i915_velems->count, i915_velems->velem);
 801    }
 802 }
 803
 804 static void
 805 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
 806 {
 807    FREE( velems );
 808 }
 809
 810 static void i915_set_index_buffer(struct pipe_context *pipe,
 811                                   const struct pipe_index_buffer *ib)
 812 {
 813    struct i915_context *i915 = i915_context(pipe);
 814
 815    if (ib)
 816       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
 817    else
 818       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
 819
 820    /* pass-through to draw module */
 821    draw_set_index_buffer(i915->draw, ib);
 822 }
 823
 824 static void
 825 i915_set_sample_mask(struct pipe_context *pipe,
 826                      unsigned sample_mask)
 827 {
 828 }
 829
 830 void
 831 i915_init_state_functions( struct i915_context *i915 )
 832 {
 833    i915->base.create_blend_state = i915_create_blend_state;
 834    i915->base.bind_blend_state = i915_bind_blend_state;
 835    i915->base.delete_blend_state = i915_delete_blend_state;
 836
 837    i915->base.create_sampler_state = i915_create_sampler_state;
 838    i915->base.bind_fragment_sampler_states = i915_bind_sampler_states;
 839    i915->base.delete_sampler_state = i915_delete_sampler_state;
 840
 841    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 842    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 843    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 844
 845    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
 846    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
 847    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
 848    i915->base.create_fs_state = i915_create_fs_state;
 849    i915->base.bind_fs_state = i915_bind_fs_state;
 850    i915->base.delete_fs_state = i915_delete_fs_state;
 851    i915->base.create_vs_state = i915_create_vs_state;
 852    i915->base.bind_vs_state = i915_bind_vs_state;
 853    i915->base.delete_vs_state = i915_delete_vs_state;
 854    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
 855    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
 856    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
 857
 858    i915->base.set_blend_color = i915_set_blend_color;
 859    i915->base.set_stencil_ref = i915_set_stencil_ref;
 860    i915->base.set_clip_state = i915_set_clip_state;
 861    i915->base.set_sample_mask = i915_set_sample_mask;
 862    i915->base.set_constant_buffer = i915_set_constant_buffer;
 863    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
 864
 865    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
 866    i915->base.set_scissor_state = i915_set_scissor_state;
 867    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
 868    i915->base.create_sampler_view = i915_create_sampler_view;
 869    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
 870    i915->base.set_viewport_state = i915_set_viewport_state;
 871    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
 872    i915->base.set_index_buffer = i915_set_index_buffer;
 873 }