src/gallium/drivers/i915simple/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 "pipe/internal/p_winsys_screen.h"
  34 #include "pipe/p_inlines.h"
  35 #include "util/u_math.h"
  36 #include "util/u_memory.h"
  37 #include "tgsi/tgsi_parse.h"
  38
  39 #include "i915_context.h"
  40 #include "i915_reg.h"
  41 #include "i915_state.h"
  42 #include "i915_state_inlines.h"
  43 #include "i915_fpc.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_MIRRORED_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    case PIPE_TEX_FILTER_ANISO:
  76       return FILTER_ANISOTROPIC;
  77    default:
  78       assert(0);
  79       return FILTER_NEAREST;
  80    }
  81 }
  82
  83 static unsigned translate_mip_filter( unsigned filter )
  84 {
  85    switch (filter) {
  86    case PIPE_TEX_MIPFILTER_NONE:
  87       return MIPFILTER_NONE;
  88    case PIPE_TEX_MIPFILTER_NEAREST:
  89       return MIPFILTER_NEAREST;
  90    case PIPE_TEX_MIPFILTER_LINEAR:
  91       return MIPFILTER_LINEAR;
  92    default:
  93       assert(0);
  94       return MIPFILTER_NONE;
  95    }
  96 }
  97
  98
  99 /* None of this state is actually used for anything yet.
 100  */
 101 static void *
 102 i915_create_blend_state(struct pipe_context *pipe,
 103                         const struct pipe_blend_state *blend)
 104 {
 105    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 106
 107    {
 108       unsigned eqRGB  = blend->rgb_func;
 109       unsigned srcRGB = blend->rgb_src_factor;
 110       unsigned dstRGB = blend->rgb_dst_factor;
 111
 112       unsigned eqA    = blend->alpha_func;
 113       unsigned srcA   = blend->alpha_src_factor;
 114       unsigned dstA   = blend->alpha_dst_factor;
 115
 116       /* Special handling for MIN/MAX filter modes handled at
 117        * state_tracker level.
 118        */
 119
 120       if (srcA != srcRGB ||
 121           dstA != dstRGB ||
 122           eqA != eqRGB) {
 123
 124          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 125                           IAB_MODIFY_ENABLE |
 126                           IAB_ENABLE |
 127                           IAB_MODIFY_FUNC |
 128                           IAB_MODIFY_SRC_FACTOR |
 129                           IAB_MODIFY_DST_FACTOR |
 130                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 131                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 132                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 133       }
 134       else {
 135          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 136                           IAB_MODIFY_ENABLE |
 137                           0);
 138       }
 139    }
 140
 141    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 142                         ENABLE_LOGIC_OP_FUNC |
 143                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 144
 145    if (blend->logicop_enable)
 146       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 147
 148    if (blend->dither)
 149       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 150
 151    if ((blend->colormask & PIPE_MASK_R) == 0)
 152       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 153
 154    if ((blend->colormask & PIPE_MASK_G) == 0)
 155       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 156
 157    if ((blend->colormask & PIPE_MASK_B) == 0)
 158       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 159
 160    if ((blend->colormask & PIPE_MASK_A) == 0)
 161       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 162
 163    if (blend->blend_enable) {
 164       unsigned funcRGB = blend->rgb_func;
 165       unsigned srcRGB  = blend->rgb_src_factor;
 166       unsigned dstRGB  = blend->rgb_dst_factor;
 167
 168       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 169                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 170                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 171                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 172    }
 173
 174    return cso_data;
 175 }
 176
 177 static void i915_bind_blend_state(struct pipe_context *pipe,
 178                                   void *blend)
 179 {
 180    struct i915_context *i915 = i915_context(pipe);
 181    draw_flush(i915->draw);
 182
 183    i915->blend = (struct i915_blend_state*)blend;
 184
 185    i915->dirty |= I915_NEW_BLEND;
 186 }
 187
 188
 189 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 190 {
 191    FREE(blend);
 192 }
 193
 194 static void i915_set_blend_color( struct pipe_context *pipe,
 195                              const struct pipe_blend_color *blend_color )
 196 {
 197    struct i915_context *i915 = i915_context(pipe);
 198    draw_flush(i915->draw);
 199
 200    i915->blend_color = *blend_color;
 201
 202    i915->dirty |= I915_NEW_BLEND;
 203 }
 204
 205 static void *
 206 i915_create_sampler_state(struct pipe_context *pipe,
 207                           const struct pipe_sampler_state *sampler)
 208 {
 209    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 210    const unsigned ws = sampler->wrap_s;
 211    const unsigned wt = sampler->wrap_t;
 212    const unsigned wr = sampler->wrap_r;
 213    unsigned minFilt, magFilt;
 214    unsigned mipFilt;
 215
 216    cso->templ = sampler;
 217
 218    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 219    minFilt = translate_img_filter( sampler->min_img_filter );
 220    magFilt = translate_img_filter( sampler->mag_img_filter );
 221
 222    if (sampler->max_anisotropy > 2.0) {
 223       cso->state[0] |= SS2_MAX_ANISO_4;
 224    }
 225
 226    {
 227       int b = (int) (sampler->lod_bias * 16.0);
 228       b = CLAMP(b, -256, 255);
 229       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 230    }
 231
 232    /* Shadow:
 233     */
 234    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 235    {
 236       cso->state[0] |= (SS2_SHADOW_ENABLE |
 237                         i915_translate_compare_func(sampler->compare_func));
 238
 239       minFilt = FILTER_4X4_FLAT;
 240       magFilt = FILTER_4X4_FLAT;
 241    }
 242
 243    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 244                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 245                      (magFilt << SS2_MAG_FILTER_SHIFT));
 246
 247    cso->state[1] |=
 248       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 249        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 250        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 251
 252    if (sampler->normalized_coords)
 253       cso->state[1] |= SS3_NORMALIZED_COORDS;
 254
 255    {
 256       int minlod = (int) (16.0 * sampler->min_lod);
 257       int maxlod = (int) (16.0 * sampler->max_lod);
 258       minlod = CLAMP(minlod, 0, 16 * 11);
 259       maxlod = CLAMP(maxlod, 0, 16 * 11);
 260
 261       if (minlod > maxlod)
 262          maxlod = minlod;
 263
 264       cso->minlod = minlod;
 265       cso->maxlod = maxlod;
 266    }
 267
 268    {
 269       ubyte r = float_to_ubyte(sampler->border_color[0]);
 270       ubyte g = float_to_ubyte(sampler->border_color[1]);
 271       ubyte b = float_to_ubyte(sampler->border_color[2]);
 272       ubyte a = float_to_ubyte(sampler->border_color[3]);
 273       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 274    }
 275    return cso;
 276 }
 277
 278 static void i915_bind_sampler_states(struct pipe_context *pipe,
 279                                      unsigned num, void **sampler)
 280 {
 281    struct i915_context *i915 = i915_context(pipe);
 282    unsigned i;
 283
 284    assert(num <= PIPE_MAX_SAMPLERS);
 285
 286    /* Check for no-op */
 287    if (num == i915->num_samplers &&
 288        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 289       return;
 290
 291    draw_flush(i915->draw);
 292
 293    for (i = 0; i < num; ++i)
 294       i915->sampler[i] = sampler[i];
 295    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 296       i915->sampler[i] = NULL;
 297
 298    i915->num_samplers = num;
 299
 300    i915->dirty |= I915_NEW_SAMPLER;
 301 }
 302
 303 static void i915_delete_sampler_state(struct pipe_context *pipe,
 304                                       void *sampler)
 305 {
 306    FREE(sampler);
 307 }
 308
 309
 310 /** XXX move someday?  Or consolidate all these simple state setters
 311  * into one file.
 312  */
 313
 314 static void *
 315 i915_create_depth_stencil_state(struct pipe_context *pipe,
 316                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 317 {
 318    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 319
 320    {
 321       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 322       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 323
 324       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 325                               ENABLE_STENCIL_TEST_MASK |
 326                               STENCIL_TEST_MASK(testmask) |
 327                               ENABLE_STENCIL_WRITE_MASK |
 328                               STENCIL_WRITE_MASK(writemask));
 329    }
 330
 331    if (depth_stencil->stencil[0].enabled) {
 332       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 333       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 334       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 335       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 336       int ref  = depth_stencil->stencil[0].ref_value & 0xff;
 337
 338       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 339                             S5_STENCIL_WRITE_ENABLE |
 340                             (ref  << S5_STENCIL_REF_SHIFT) |
 341                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 342                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 343                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 344                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 345    }
 346
 347    if (depth_stencil->stencil[1].enabled) {
 348       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 349       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 350       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 351       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 352       int ref   = depth_stencil->stencil[1].ref_value & 0xff;
 353       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 354       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 355
 356       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 357                      BFO_ENABLE_STENCIL_FUNCS |
 358                      BFO_ENABLE_STENCIL_TWO_SIDE |
 359                      BFO_ENABLE_STENCIL_REF |
 360                      BFO_STENCIL_TWO_SIDE |
 361                      (ref  << BFO_STENCIL_REF_SHIFT) |
 362                      (test << BFO_STENCIL_TEST_SHIFT) |
 363                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 364                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 365                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 366
 367       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 368                      BFM_ENABLE_STENCIL_TEST_MASK |
 369                      BFM_ENABLE_STENCIL_WRITE_MASK |
 370                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 371                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 372    }
 373    else {
 374       /* This actually disables two-side stencil: The bit set is a
 375        * modify-enable bit to indicate we are changing the two-side
 376        * setting.  Then there is a symbolic zero to show that we are
 377        * setting the flag to zero/off.
 378        */
 379       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 380                      BFO_ENABLE_STENCIL_TWO_SIDE |
 381                      0);
 382       cso->bfo[1] = 0;
 383    }
 384
 385    if (depth_stencil->depth.enabled) {
 386       int func = i915_translate_compare_func(depth_stencil->depth.func);
 387
 388       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 389                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 390
 391       if (depth_stencil->depth.writemask)
 392          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 393    }
 394
 395    if (depth_stencil->alpha.enabled) {
 396       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 397       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 398
 399       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 400                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 401                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 402    }
 403
 404    return cso;
 405 }
 406
 407 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 408                                           void *depth_stencil)
 409 {
 410    struct i915_context *i915 = i915_context(pipe);
 411    draw_flush(i915->draw);
 412
 413    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 414
 415    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 416 }
 417
 418 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 419                                             void *depth_stencil)
 420 {
 421    FREE(depth_stencil);
 422 }
 423
 424
 425 static void i915_set_scissor_state( struct pipe_context *pipe,
 426                                  const struct pipe_scissor_state *scissor )
 427 {
 428    struct i915_context *i915 = i915_context(pipe);
 429    draw_flush(i915->draw);
 430
 431    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 432    i915->dirty |= I915_NEW_SCISSOR;
 433 }
 434
 435
 436 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 437                                    const struct pipe_poly_stipple *stipple )
 438 {
 439 }
 440
 441
 442
 443 static void *
 444 i915_create_fs_state(struct pipe_context *pipe,
 445                      const struct pipe_shader_state *templ)
 446 {
 447    struct i915_context *i915 = i915_context(pipe);
 448    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 449    if (!ifs)
 450       return NULL;
 451
 452    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 453
 454    tgsi_scan_shader(templ->tokens, &ifs->info);
 455
 456    /* The shader's compiled to i915 instructions here */
 457    i915_translate_fragment_program(i915, ifs);
 458
 459    return ifs;
 460 }
 461
 462 static void
 463 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 464 {
 465    struct i915_context *i915 = i915_context(pipe);
 466    draw_flush(i915->draw);
 467
 468    i915->fs = (struct i915_fragment_shader*) shader;
 469
 470    i915->dirty |= I915_NEW_FS;
 471 }
 472
 473 static
 474 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 475 {
 476    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 477
 478    if (ifs->program)
 479       FREE(ifs->program);
 480    ifs->program_len = 0;
 481
 482    FREE((struct tgsi_token *)ifs->state.tokens);
 483
 484    FREE(ifs);
 485 }
 486
 487
 488 static void *
 489 i915_create_vs_state(struct pipe_context *pipe,
 490                      const struct pipe_shader_state *templ)
 491 {
 492    struct i915_context *i915 = i915_context(pipe);
 493
 494    /* just pass-through to draw module */
 495    return draw_create_vertex_shader(i915->draw, templ);
 496 }
 497
 498 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 499 {
 500    struct i915_context *i915 = i915_context(pipe);
 501
 502    /* just pass-through to draw module */
 503    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 504
 505    i915->dirty |= I915_NEW_VS;
 506 }
 507
 508 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 509 {
 510    struct i915_context *i915 = i915_context(pipe);
 511
 512    /* just pass-through to draw module */
 513    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 514 }
 515
 516 static void i915_set_constant_buffer(struct pipe_context *pipe,
 517                                      uint shader, uint index,
 518                                      const struct pipe_constant_buffer *buf)
 519 {
 520    struct i915_context *i915 = i915_context(pipe);
 521    struct pipe_winsys *ws = pipe->winsys;
 522    draw_flush(i915->draw);
 523
 524    assert(shader < PIPE_SHADER_TYPES);
 525    assert(index == 0);
 526
 527    /* Make a copy of shader constants.
 528     * During fragment program translation we may add additional
 529     * constants to the array.
 530     *
 531     * We want to consider the situation where some user constants
 532     * (ex: a material color) may change frequently but the shader program
 533     * stays the same.  In that case we should only be updating the first
 534     * N constants, leaving any extras from shader translation alone.
 535     */
 536    if (buf) {
 537       void *mapped;
 538       if (buf->buffer && buf->buffer->size &&
 539           (mapped = ws->buffer_map(ws, buf->buffer,
 540                                     PIPE_BUFFER_USAGE_CPU_READ))) {
 541          memcpy(i915->current.constants[shader], mapped, buf->buffer->size);
 542          ws->buffer_unmap(ws, buf->buffer);
 543          i915->current.num_user_constants[shader]
 544             = buf->buffer->size / (4 * sizeof(float));
 545       }
 546       else {
 547          i915->current.num_user_constants[shader] = 0;
 548       }
 549    }
 550
 551    i915->dirty |= I915_NEW_CONSTANTS;
 552 }
 553
 554
 555 static void i915_set_sampler_textures(struct pipe_context *pipe,
 556                                       unsigned num,
 557                                       struct pipe_texture **texture)
 558 {
 559    struct i915_context *i915 = i915_context(pipe);
 560    uint i;
 561
 562    assert(num <= PIPE_MAX_SAMPLERS);
 563
 564    /* Check for no-op */
 565    if (num == i915->num_textures &&
 566        !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
 567       return;
 568
 569    /* Fixes wrong texture in texobj with VBUF */
 570    draw_flush(i915->draw);
 571
 572    for (i = 0; i < num; i++)
 573       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 574                              texture[i]);
 575
 576    for (i = num; i < i915->num_textures; i++)
 577       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 578                              NULL);
 579
 580    i915->num_textures = num;
 581
 582    i915->dirty |= I915_NEW_TEXTURE;
 583 }
 584
 585
 586
 587 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 588                                        const struct pipe_framebuffer_state *fb)
 589 {
 590    struct i915_context *i915 = i915_context(pipe);
 591    draw_flush(i915->draw);
 592
 593    i915->framebuffer = *fb; /* struct copy */
 594
 595    i915->dirty |= I915_NEW_FRAMEBUFFER;
 596 }
 597
 598
 599
 600 static void i915_set_clip_state( struct pipe_context *pipe,
 601                              const struct pipe_clip_state *clip )
 602 {
 603    struct i915_context *i915 = i915_context(pipe);
 604    draw_flush(i915->draw);
 605
 606    draw_set_clip_state(i915->draw, clip);
 607
 608    i915->dirty |= I915_NEW_CLIP;
 609 }
 610
 611
 612
 613 /* Called when driver state tracker notices changes to the viewport
 614  * matrix:
 615  */
 616 static void i915_set_viewport_state( struct pipe_context *pipe,
 617                                      const struct pipe_viewport_state *viewport )
 618 {
 619    struct i915_context *i915 = i915_context(pipe);
 620
 621    i915->viewport = *viewport; /* struct copy */
 622
 623    /* pass the viewport info to the draw module */
 624    draw_set_viewport_state(i915->draw, &i915->viewport);
 625
 626    i915->dirty |= I915_NEW_VIEWPORT;
 627 }
 628
 629
 630 static void *
 631 i915_create_rasterizer_state(struct pipe_context *pipe,
 632                              const struct pipe_rasterizer_state *rasterizer)
 633 {
 634    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 635
 636    cso->templ = rasterizer;
 637    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 638    cso->light_twoside = rasterizer->light_twoside;
 639    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 640    cso->ds[1].f = rasterizer->offset_scale;
 641    if (rasterizer->poly_stipple_enable) {
 642       cso->st |= ST1_ENABLE;
 643    }
 644
 645    if (rasterizer->scissor)
 646       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 647    else
 648       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 649
 650    switch (rasterizer->cull_mode) {
 651    case PIPE_WINDING_NONE:
 652       cso->LIS4 |= S4_CULLMODE_NONE;
 653       break;
 654    case PIPE_WINDING_CW:
 655       cso->LIS4 |= S4_CULLMODE_CW;
 656       break;
 657    case PIPE_WINDING_CCW:
 658       cso->LIS4 |= S4_CULLMODE_CCW;
 659       break;
 660    case PIPE_WINDING_BOTH:
 661       cso->LIS4 |= S4_CULLMODE_BOTH;
 662       break;
 663    }
 664
 665    {
 666       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 667
 668       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 669
 670       if (rasterizer->line_smooth)
 671          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 672    }
 673
 674    {
 675       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 676
 677       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 678    }
 679
 680    if (rasterizer->flatshade) {
 681       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 682                     S4_FLATSHADE_COLOR |
 683                     S4_FLATSHADE_SPECULAR);
 684    }
 685
 686    cso->LIS7 = fui( rasterizer->offset_units );
 687
 688
 689    return cso;
 690 }
 691
 692 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 693                                         void *raster )
 694 {
 695    struct i915_context *i915 = i915_context(pipe);
 696
 697    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 698
 699    /* pass-through to draw module */
 700    draw_set_rasterizer_state(i915->draw,
 701                           (i915->rasterizer ? i915->rasterizer->templ : NULL));
 702
 703    i915->dirty |= I915_NEW_RASTERIZER;
 704 }
 705
 706 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 707                                          void *raster)
 708 {
 709    FREE(raster);
 710 }
 711
 712 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 713                                     unsigned count,
 714                                     const struct pipe_vertex_buffer *buffers)
 715 {
 716    struct i915_context *i915 = i915_context(pipe);
 717    /* Because we change state before the draw_set_vertex_buffers call
 718     * we need a flush here, just to be sure.
 719     */
 720    draw_flush(i915->draw);
 721
 722    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 723    i915->num_vertex_buffers = count;
 724
 725    /* pass-through to draw module */
 726    draw_set_vertex_buffers(i915->draw, count, buffers);
 727 }
 728
 729 static void i915_set_vertex_elements(struct pipe_context *pipe,
 730                                      unsigned count,
 731                                      const struct pipe_vertex_element *elements)
 732 {
 733    struct i915_context *i915 = i915_context(pipe);
 734    /* Because we change state before the draw_set_vertex_buffers call
 735     * we need a flush here, just to be sure.
 736     */
 737    draw_flush(i915->draw);
 738
 739    i915->num_vertex_elements = count;
 740    /* pass-through to draw module */
 741    draw_set_vertex_elements(i915->draw, count, elements);
 742 }
 743
 744
 745 static void i915_set_edgeflags(struct pipe_context *pipe,
 746                                const unsigned *bitfield)
 747 {
 748    /* TODO do something here */
 749 }
 750
 751 void
 752 i915_init_state_functions( struct i915_context *i915 )
 753 {
 754    i915->pipe.set_edgeflags = i915_set_edgeflags;
 755    i915->pipe.create_blend_state = i915_create_blend_state;
 756    i915->pipe.bind_blend_state = i915_bind_blend_state;
 757    i915->pipe.delete_blend_state = i915_delete_blend_state;
 758
 759    i915->pipe.create_sampler_state = i915_create_sampler_state;
 760    i915->pipe.bind_sampler_states = i915_bind_sampler_states;
 761    i915->pipe.delete_sampler_state = i915_delete_sampler_state;
 762
 763    i915->pipe.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 764    i915->pipe.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 765    i915->pipe.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 766
 767    i915->pipe.create_rasterizer_state = i915_create_rasterizer_state;
 768    i915->pipe.bind_rasterizer_state = i915_bind_rasterizer_state;
 769    i915->pipe.delete_rasterizer_state = i915_delete_rasterizer_state;
 770    i915->pipe.create_fs_state = i915_create_fs_state;
 771    i915->pipe.bind_fs_state = i915_bind_fs_state;
 772    i915->pipe.delete_fs_state = i915_delete_fs_state;
 773    i915->pipe.create_vs_state = i915_create_vs_state;
 774    i915->pipe.bind_vs_state = i915_bind_vs_state;
 775    i915->pipe.delete_vs_state = i915_delete_vs_state;
 776
 777    i915->pipe.set_blend_color = i915_set_blend_color;
 778    i915->pipe.set_clip_state = i915_set_clip_state;
 779    i915->pipe.set_constant_buffer = i915_set_constant_buffer;
 780    i915->pipe.set_framebuffer_state = i915_set_framebuffer_state;
 781
 782    i915->pipe.set_polygon_stipple = i915_set_polygon_stipple;
 783    i915->pipe.set_scissor_state = i915_set_scissor_state;
 784    i915->pipe.set_sampler_textures = i915_set_sampler_textures;
 785    i915->pipe.set_viewport_state = i915_set_viewport_state;
 786    i915->pipe.set_vertex_buffers = i915_set_vertex_buffers;
 787    i915->pipe.set_vertex_elements = i915_set_vertex_elements;
 788 }