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/p_winsys.h"
  34 #include "pipe/p_util.h"
  35 #include "pipe/p_inlines.h"
  36 #include "tgsi/util/tgsi_parse.h"
  37
  38 #include "i915_context.h"
  39 #include "i915_reg.h"
  40 #include "i915_state.h"
  41 #include "i915_state_inlines.h"
  42 #include "i915_fpc.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 //   case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  61 //      return TEXCOORDMODE_MIRROR;
  62    default:
  63       return TEXCOORDMODE_WRAP;
  64    }
  65 }
  66
  67 static unsigned translate_img_filter( unsigned filter )
  68 {
  69    switch (filter) {
  70    case PIPE_TEX_FILTER_NEAREST:
  71       return FILTER_NEAREST;
  72    case PIPE_TEX_FILTER_LINEAR:
  73       return FILTER_LINEAR;
  74    case PIPE_TEX_FILTER_ANISO:
  75       return FILTER_ANISOTROPIC;
  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->rgb_func;
 108       unsigned srcRGB = blend->rgb_src_factor;
 109       unsigned dstRGB = blend->rgb_dst_factor;
 110
 111       unsigned eqA    = blend->alpha_func;
 112       unsigned srcA   = blend->alpha_src_factor;
 113       unsigned dstA   = blend->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->colormask & PIPE_MASK_R) == 0)
 151       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 152
 153    if ((blend->colormask & PIPE_MASK_G) == 0)
 154       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 155
 156    if ((blend->colormask & PIPE_MASK_B) == 0)
 157       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 158
 159    if ((blend->colormask & PIPE_MASK_A) == 0)
 160       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 161
 162    if (blend->blend_enable) {
 163       unsigned funcRGB = blend->rgb_func;
 164       unsigned srcRGB  = blend->rgb_src_factor;
 165       unsigned dstRGB  = blend->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 *
 205 i915_create_sampler_state(struct pipe_context *pipe,
 206                           const struct pipe_sampler_state *sampler)
 207 {
 208    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 209    const unsigned ws = sampler->wrap_s;
 210    const unsigned wt = sampler->wrap_t;
 211    const unsigned wr = sampler->wrap_r;
 212    unsigned minFilt, magFilt;
 213    unsigned mipFilt;
 214
 215    cso->templ = sampler;
 216
 217    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 218    minFilt = translate_img_filter( sampler->min_img_filter );
 219    magFilt = translate_img_filter( sampler->mag_img_filter );
 220
 221    if (sampler->max_anisotropy > 2.0) {
 222       cso->state[0] |= SS2_MAX_ANISO_4;
 223    }
 224
 225    {
 226       int b = (int) (sampler->lod_bias * 16.0);
 227       b = CLAMP(b, -256, 255);
 228       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 229    }
 230
 231    /* Shadow:
 232     */
 233    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 234    {
 235       cso->state[0] |= (SS2_SHADOW_ENABLE |
 236                         i915_translate_compare_func(sampler->compare_func));
 237
 238       minFilt = FILTER_4X4_FLAT;
 239       magFilt = FILTER_4X4_FLAT;
 240    }
 241
 242    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 243                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 244                      (magFilt << SS2_MAG_FILTER_SHIFT));
 245
 246    cso->state[1] |=
 247       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 248        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 249        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 250
 251    if (sampler->normalized_coords)
 252       cso->state[1] |= SS3_NORMALIZED_COORDS;
 253
 254    {
 255       int minlod = (int) (16.0 * sampler->min_lod);
 256       int maxlod = (int) (16.0 * sampler->max_lod);
 257       minlod = CLAMP(minlod, 0, 16 * 11);
 258       maxlod = CLAMP(maxlod, 0, 16 * 11);
 259
 260       if (minlod > maxlod)
 261          maxlod = minlod;
 262
 263       cso->minlod = minlod;
 264       cso->maxlod = maxlod;
 265    }
 266
 267    {
 268       ubyte r = float_to_ubyte(sampler->border_color[0]);
 269       ubyte g = float_to_ubyte(sampler->border_color[1]);
 270       ubyte b = float_to_ubyte(sampler->border_color[2]);
 271       ubyte a = float_to_ubyte(sampler->border_color[3]);
 272       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 273    }
 274    return cso;
 275 }
 276
 277 static void i915_bind_sampler_states(struct pipe_context *pipe,
 278                                      unsigned num, void **sampler)
 279 {
 280    struct i915_context *i915 = i915_context(pipe);
 281    unsigned i;
 282
 283    assert(num <= PIPE_MAX_SAMPLERS);
 284
 285    /* Check for no-op */
 286    if (num == i915->num_samplers &&
 287        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 288       return;
 289
 290    draw_flush(i915->draw);
 291
 292    for (i = 0; i < num; ++i)
 293       i915->sampler[i] = sampler[i];
 294    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 295       i915->sampler[i] = NULL;
 296
 297    i915->num_samplers = num;
 298
 299    i915->dirty |= I915_NEW_SAMPLER;
 300 }
 301
 302 static void i915_delete_sampler_state(struct pipe_context *pipe,
 303                                       void *sampler)
 304 {
 305    FREE(sampler);
 306 }
 307
 308
 309 /** XXX move someday?  Or consolidate all these simple state setters
 310  * into one file.
 311  */
 312
 313 static void *
 314 i915_create_depth_stencil_state(struct pipe_context *pipe,
 315                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 316 {
 317    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 318
 319    {
 320       int testmask = depth_stencil->stencil[0].value_mask & 0xff;
 321       int writemask = depth_stencil->stencil[0].write_mask & 0xff;
 322
 323       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 324                               ENABLE_STENCIL_TEST_MASK |
 325                               STENCIL_TEST_MASK(testmask) |
 326                               ENABLE_STENCIL_WRITE_MASK |
 327                               STENCIL_WRITE_MASK(writemask));
 328    }
 329
 330    if (depth_stencil->stencil[0].enabled) {
 331       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 332       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 333       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 334       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 335       int ref  = depth_stencil->stencil[0].ref_value & 0xff;
 336
 337       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 338                             S5_STENCIL_WRITE_ENABLE |
 339                             (ref  << S5_STENCIL_REF_SHIFT) |
 340                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 341                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 342                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 343                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 344    }
 345
 346    if (depth_stencil->stencil[1].enabled) {
 347       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 348       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 349       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 350       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 351       int ref   = depth_stencil->stencil[1].ref_value & 0xff;
 352       int tmask = depth_stencil->stencil[1].value_mask & 0xff;
 353       int wmask = depth_stencil->stencil[1].write_mask & 0xff;
 354
 355       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 356                      BFO_ENABLE_STENCIL_FUNCS |
 357                      BFO_ENABLE_STENCIL_TWO_SIDE |
 358                      BFO_ENABLE_STENCIL_REF |
 359                      BFO_STENCIL_TWO_SIDE |
 360                      (ref  << BFO_STENCIL_REF_SHIFT) |
 361                      (test << BFO_STENCIL_TEST_SHIFT) |
 362                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 363                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 364                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 365
 366       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 367                      BFM_ENABLE_STENCIL_TEST_MASK |
 368                      BFM_ENABLE_STENCIL_WRITE_MASK |
 369                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 370                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 371    }
 372    else {
 373       /* This actually disables two-side stencil: The bit set is a
 374        * modify-enable bit to indicate we are changing the two-side
 375        * setting.  Then there is a symbolic zero to show that we are
 376        * setting the flag to zero/off.
 377        */
 378       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 379                      BFO_ENABLE_STENCIL_TWO_SIDE |
 380                      0);
 381       cso->bfo[1] = 0;
 382    }
 383
 384    if (depth_stencil->depth.enabled) {
 385       int func = i915_translate_compare_func(depth_stencil->depth.func);
 386
 387       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 388                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 389
 390       if (depth_stencil->depth.writemask)
 391          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 392    }
 393
 394    if (depth_stencil->alpha.enabled) {
 395       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 396       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref);
 397
 398       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 399                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 400                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 401    }
 402
 403    return cso;
 404 }
 405
 406 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 407                                           void *depth_stencil)
 408 {
 409    struct i915_context *i915 = i915_context(pipe);
 410    draw_flush(i915->draw);
 411
 412    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 413
 414    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 415 }
 416
 417 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 418                                             void *depth_stencil)
 419 {
 420    FREE(depth_stencil);
 421 }
 422
 423
 424 static void i915_set_scissor_state( struct pipe_context *pipe,
 425                                  const struct pipe_scissor_state *scissor )
 426 {
 427    struct i915_context *i915 = i915_context(pipe);
 428    draw_flush(i915->draw);
 429
 430    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 431    i915->dirty |= I915_NEW_SCISSOR;
 432 }
 433
 434
 435 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 436                                    const struct pipe_poly_stipple *stipple )
 437 {
 438 }
 439
 440
 441
 442 static void *
 443 i915_create_fs_state(struct pipe_context *pipe,
 444                      const struct pipe_shader_state *templ)
 445 {
 446    struct i915_context *i915 = i915_context(pipe);
 447    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 448    if (!ifs)
 449       return NULL;
 450
 451    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 452
 453    tgsi_scan_shader(templ->tokens, &ifs->info);
 454
 455    /* The shader's compiled to i915 instructions here */
 456    i915_translate_fragment_program(i915, ifs);
 457
 458    return ifs;
 459 }
 460
 461 static void
 462 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 463 {
 464    struct i915_context *i915 = i915_context(pipe);
 465    draw_flush(i915->draw);
 466
 467    i915->fs = (struct i915_fragment_shader*) shader;
 468
 469    i915->dirty |= I915_NEW_FS;
 470 }
 471
 472 static
 473 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 474 {
 475    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 476
 477    if (ifs->program)
 478       FREE(ifs->program);
 479    ifs->program_len = 0;
 480
 481    FREE((struct tgsi_token *)ifs->state.tokens);
 482
 483    FREE(ifs);
 484 }
 485
 486
 487 static void *
 488 i915_create_vs_state(struct pipe_context *pipe,
 489                      const struct pipe_shader_state *templ)
 490 {
 491    struct i915_context *i915 = i915_context(pipe);
 492
 493    /* just pass-through to draw module */
 494    return draw_create_vertex_shader(i915->draw, templ);
 495 }
 496
 497 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 498 {
 499    struct i915_context *i915 = i915_context(pipe);
 500
 501    /* just pass-through to draw module */
 502    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 503
 504    i915->dirty |= I915_NEW_VS;
 505 }
 506
 507 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 508 {
 509    struct i915_context *i915 = i915_context(pipe);
 510
 511    /* just pass-through to draw module */
 512    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 513 }
 514
 515 static void i915_set_constant_buffer(struct pipe_context *pipe,
 516                                      uint shader, uint index,
 517                                      const struct pipe_constant_buffer *buf)
 518 {
 519    struct i915_context *i915 = i915_context(pipe);
 520    struct pipe_winsys *ws = pipe->winsys;
 521    draw_flush(i915->draw);
 522
 523    assert(shader < PIPE_SHADER_TYPES);
 524    assert(index == 0);
 525
 526    /* Make a copy of shader constants.
 527     * During fragment program translation we may add additional
 528     * constants to the array.
 529     *
 530     * We want to consider the situation where some user constants
 531     * (ex: a material color) may change frequently but the shader program
 532     * stays the same.  In that case we should only be updating the first
 533     * N constants, leaving any extras from shader translation alone.
 534     */
 535    if (buf) {
 536       void *mapped;
 537       if (buf->size &&
 538           (mapped = ws->buffer_map(ws, buf->buffer,
 539                                    PIPE_BUFFER_USAGE_CPU_READ))) {
 540          memcpy(i915->current.constants[shader], mapped, buf->size);
 541          ws->buffer_unmap(ws, buf->buffer);
 542          i915->current.num_user_constants[shader]
 543             = buf->size / (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_sampler_textures(struct pipe_context *pipe,
 555                                       unsigned num,
 556                                       struct pipe_texture **texture)
 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_textures &&
 565        !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
 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_texture_reference((struct pipe_texture **) &i915->texture[i],
 573                              texture[i]);
 574
 575    for (i = num; i < i915->num_textures; i++)
 576       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 577                              NULL);
 578
 579    i915->num_textures = num;
 580
 581    i915->dirty |= I915_NEW_TEXTURE;
 582 }
 583
 584
 585
 586 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 587                                        const struct pipe_framebuffer_state *fb)
 588 {
 589    struct i915_context *i915 = i915_context(pipe);
 590    draw_flush(i915->draw);
 591
 592    i915->framebuffer = *fb; /* struct copy */
 593
 594    i915->dirty |= I915_NEW_FRAMEBUFFER;
 595 }
 596
 597
 598
 599 static void i915_set_clip_state( struct pipe_context *pipe,
 600                              const struct pipe_clip_state *clip )
 601 {
 602    struct i915_context *i915 = i915_context(pipe);
 603    draw_flush(i915->draw);
 604
 605    draw_set_clip_state(i915->draw, clip);
 606
 607    i915->dirty |= I915_NEW_CLIP;
 608 }
 609
 610
 611
 612 /* Called when driver state tracker notices changes to the viewport
 613  * matrix:
 614  */
 615 static void i915_set_viewport_state( struct pipe_context *pipe,
 616                                      const struct pipe_viewport_state *viewport )
 617 {
 618    struct i915_context *i915 = i915_context(pipe);
 619
 620    i915->viewport = *viewport; /* struct copy */
 621
 622    /* pass the viewport info to the draw module */
 623    draw_set_viewport_state(i915->draw, &i915->viewport);
 624
 625    i915->dirty |= I915_NEW_VIEWPORT;
 626 }
 627
 628
 629 static void *
 630 i915_create_rasterizer_state(struct pipe_context *pipe,
 631                              const struct pipe_rasterizer_state *rasterizer)
 632 {
 633    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 634
 635    cso->templ = rasterizer;
 636    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 637    cso->light_twoside = rasterizer->light_twoside;
 638    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 639    cso->ds[1].f = rasterizer->offset_scale;
 640    if (rasterizer->poly_stipple_enable) {
 641       cso->st |= ST1_ENABLE;
 642    }
 643
 644    if (rasterizer->scissor)
 645       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 646    else
 647       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 648
 649    switch (rasterizer->cull_mode) {
 650    case PIPE_WINDING_NONE:
 651       cso->LIS4 |= S4_CULLMODE_NONE;
 652       break;
 653    case PIPE_WINDING_CW:
 654       cso->LIS4 |= S4_CULLMODE_CW;
 655       break;
 656    case PIPE_WINDING_CCW:
 657       cso->LIS4 |= S4_CULLMODE_CCW;
 658       break;
 659    case PIPE_WINDING_BOTH:
 660       cso->LIS4 |= S4_CULLMODE_BOTH;
 661       break;
 662    }
 663
 664    {
 665       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 666
 667       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 668
 669       if (rasterizer->line_smooth)
 670          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 671    }
 672
 673    {
 674       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 675
 676       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 677    }
 678
 679    if (rasterizer->flatshade) {
 680       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 681                     S4_FLATSHADE_COLOR |
 682                     S4_FLATSHADE_SPECULAR);
 683    }
 684
 685    cso->LIS7 = fui( rasterizer->offset_units );
 686
 687
 688    return cso;
 689 }
 690
 691 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 692                                         void *raster )
 693 {
 694    struct i915_context *i915 = i915_context(pipe);
 695
 696    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 697
 698    /* pass-through to draw module */
 699    draw_set_rasterizer_state(i915->draw,
 700                           (i915->rasterizer ? i915->rasterizer->templ : NULL));
 701
 702    i915->dirty |= I915_NEW_RASTERIZER;
 703 }
 704
 705 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 706                                          void *raster)
 707 {
 708    FREE(raster);
 709 }
 710
 711 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 712                                     unsigned count,
 713                                     const struct pipe_vertex_buffer *buffers)
 714 {
 715    struct i915_context *i915 = i915_context(pipe);
 716    /* Because we change state before the draw_set_vertex_buffers call
 717     * we need a flush here, just to be sure.
 718     */
 719    draw_flush(i915->draw);
 720
 721    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 722    i915->num_vertex_buffers = count;
 723
 724    /* pass-through to draw module */
 725    draw_set_vertex_buffers(i915->draw, count, buffers);
 726 }
 727
 728 static void i915_set_vertex_elements(struct pipe_context *pipe,
 729                                      unsigned count,
 730                                      const struct pipe_vertex_element *elements)
 731 {
 732    struct i915_context *i915 = i915_context(pipe);
 733    /* Because we change state before the draw_set_vertex_buffers call
 734     * we need a flush here, just to be sure.
 735     */
 736    draw_flush(i915->draw);
 737
 738    i915->num_vertex_elements = count;
 739    /* pass-through to draw module */
 740    draw_set_vertex_elements(i915->draw, count, elements);
 741 }
 742
 743
 744 static void i915_set_edgeflags(struct pipe_context *pipe,
 745                                const unsigned *bitfield)
 746 {
 747    /* TODO do something here */
 748 }
 749
 750 void
 751 i915_init_state_functions( struct i915_context *i915 )
 752 {
 753    i915->pipe.set_edgeflags = i915_set_edgeflags;
 754    i915->pipe.create_blend_state = i915_create_blend_state;
 755    i915->pipe.bind_blend_state = i915_bind_blend_state;
 756    i915->pipe.delete_blend_state = i915_delete_blend_state;
 757
 758    i915->pipe.create_sampler_state = i915_create_sampler_state;
 759    i915->pipe.bind_sampler_states = i915_bind_sampler_states;
 760    i915->pipe.delete_sampler_state = i915_delete_sampler_state;
 761
 762    i915->pipe.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 763    i915->pipe.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 764    i915->pipe.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 765
 766    i915->pipe.create_rasterizer_state = i915_create_rasterizer_state;
 767    i915->pipe.bind_rasterizer_state = i915_bind_rasterizer_state;
 768    i915->pipe.delete_rasterizer_state = i915_delete_rasterizer_state;
 769    i915->pipe.create_fs_state = i915_create_fs_state;
 770    i915->pipe.bind_fs_state = i915_bind_fs_state;
 771    i915->pipe.delete_fs_state = i915_delete_fs_state;
 772    i915->pipe.create_vs_state = i915_create_vs_state;
 773    i915->pipe.bind_vs_state = i915_bind_vs_state;
 774    i915->pipe.delete_vs_state = i915_delete_vs_state;
 775
 776    i915->pipe.set_blend_color = i915_set_blend_color;
 777    i915->pipe.set_clip_state = i915_set_clip_state;
 778    i915->pipe.set_constant_buffer = i915_set_constant_buffer;
 779    i915->pipe.set_framebuffer_state = i915_set_framebuffer_state;
 780
 781    i915->pipe.set_polygon_stipple = i915_set_polygon_stipple;
 782    i915->pipe.set_scissor_state = i915_set_scissor_state;
 783    i915->pipe.set_sampler_textures = i915_set_sampler_textures;
 784    i915->pipe.set_viewport_state = i915_set_viewport_state;
 785    i915->pipe.set_vertex_buffers = i915_set_vertex_buffers;
 786    i915->pipe.set_vertex_elements = i915_set_vertex_elements;
 787 }