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