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 "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 /*
  62    case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  63       return TEXCOORDMODE_MIRROR;
  64 */
  65    default:
  66       return TEXCOORDMODE_WRAP;
  67    }
  68 }
  69
  70 static unsigned translate_img_filter( unsigned filter )
  71 {
  72    switch (filter) {
  73    case PIPE_TEX_FILTER_NEAREST:
  74       return FILTER_NEAREST;
  75    case PIPE_TEX_FILTER_LINEAR:
  76       return FILTER_LINEAR;
  77    case PIPE_TEX_FILTER_ANISO:
  78       return FILTER_ANISOTROPIC;
  79    default:
  80       assert(0);
  81       return FILTER_NEAREST;
  82    }
  83 }
  84
  85 static unsigned translate_mip_filter( unsigned filter )
  86 {
  87    switch (filter) {
  88    case PIPE_TEX_MIPFILTER_NONE:
  89       return MIPFILTER_NONE;
  90    case PIPE_TEX_MIPFILTER_NEAREST:
  91       return MIPFILTER_NEAREST;
  92    case PIPE_TEX_MIPFILTER_LINEAR:
  93       return MIPFILTER_LINEAR;
  94    default:
  95       assert(0);
  96       return MIPFILTER_NONE;
  97    }
  98 }
  99
 100
 101 /* None of this state is actually used for anything yet.
 102  */
 103 static void *
 104 i915_create_blend_state(struct pipe_context *pipe,
 105                         const struct pipe_blend_state *blend)
 106 {
 107    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 108
 109    {
 110       unsigned eqRGB  = blend->rgb_func;
 111       unsigned srcRGB = blend->rgb_src_factor;
 112       unsigned dstRGB = blend->rgb_dst_factor;
 113
 114       unsigned eqA    = blend->alpha_func;
 115       unsigned srcA   = blend->alpha_src_factor;
 116       unsigned dstA   = blend->alpha_dst_factor;
 117
 118       /* Special handling for MIN/MAX filter modes handled at
 119        * state_tracker level.
 120        */
 121
 122       if (srcA != srcRGB ||
 123           dstA != dstRGB ||
 124           eqA != eqRGB) {
 125
 126          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 127                           IAB_MODIFY_ENABLE |
 128                           IAB_ENABLE |
 129                           IAB_MODIFY_FUNC |
 130                           IAB_MODIFY_SRC_FACTOR |
 131                           IAB_MODIFY_DST_FACTOR |
 132                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 133                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 134                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 135       }
 136       else {
 137          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 138                           IAB_MODIFY_ENABLE |
 139                           0);
 140       }
 141    }
 142
 143    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 144                         ENABLE_LOGIC_OP_FUNC |
 145                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 146
 147    if (blend->logicop_enable)
 148       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 149
 150    if (blend->dither)
 151       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 152
 153    if ((blend->colormask & PIPE_MASK_R) == 0)
 154       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 155
 156    if ((blend->colormask & PIPE_MASK_G) == 0)
 157       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 158
 159    if ((blend->colormask & PIPE_MASK_B) == 0)
 160       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 161
 162    if ((blend->colormask & PIPE_MASK_A) == 0)
 163       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 164
 165    if (blend->blend_enable) {
 166       unsigned funcRGB = blend->rgb_func;
 167       unsigned srcRGB  = blend->rgb_src_factor;
 168       unsigned dstRGB  = blend->rgb_dst_factor;
 169
 170       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 171                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 172                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 173                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 174    }
 175
 176    return cso_data;
 177 }
 178
 179 static void i915_bind_blend_state(struct pipe_context *pipe,
 180                                   void *blend)
 181 {
 182    struct i915_context *i915 = i915_context(pipe);
 183    draw_flush(i915->draw);
 184
 185    i915->blend = (struct i915_blend_state*)blend;
 186
 187    i915->dirty |= I915_NEW_BLEND;
 188 }
 189
 190
 191 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 192 {
 193    FREE(blend);
 194 }
 195
 196 static void i915_set_blend_color( struct pipe_context *pipe,
 197                              const struct pipe_blend_color *blend_color )
 198 {
 199    struct i915_context *i915 = i915_context(pipe);
 200    draw_flush(i915->draw);
 201
 202    i915->blend_color = *blend_color;
 203
 204    i915->dirty |= I915_NEW_BLEND;
 205 }
 206
 207 static void *
 208 i915_create_sampler_state(struct pipe_context *pipe,
 209                           const struct pipe_sampler_state *sampler)
 210 {
 211    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 212    const unsigned ws = sampler->wrap_s;
 213    const unsigned wt = sampler->wrap_t;
 214    const unsigned wr = sampler->wrap_r;
 215    unsigned minFilt, magFilt;
 216    unsigned mipFilt;
 217
 218    cso->templ = sampler;
 219
 220    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 221    minFilt = translate_img_filter( sampler->min_img_filter );
 222    magFilt = translate_img_filter( sampler->mag_img_filter );
 223
 224    if (sampler->max_anisotropy > 2.0) {
 225       cso->state[0] |= SS2_MAX_ANISO_4;
 226    }
 227
 228    {
 229       int b = (int) (sampler->lod_bias * 16.0);
 230       b = CLAMP(b, -256, 255);
 231       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 232    }
 233
 234    /* Shadow:
 235     */
 236    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 237    {
 238       cso->state[0] |= (SS2_SHADOW_ENABLE |
 239                         i915_translate_compare_func(sampler->compare_func));
 240
 241       minFilt = FILTER_4X4_FLAT;
 242       magFilt = FILTER_4X4_FLAT;
 243    }
 244
 245    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 246                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 247                      (magFilt << SS2_MAG_FILTER_SHIFT));
 248
 249    cso->state[1] |=
 250       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 251        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 252        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 253
 254    if (sampler->normalized_coords)
 255       cso->state[1] |= SS3_NORMALIZED_COORDS;
 256
 257    {
 258       int minlod = (int) (16.0 * sampler->min_lod);
 259       int maxlod = (int) (16.0 * sampler->max_lod);
 260       minlod = CLAMP(minlod, 0, 16 * 11);
 261       maxlod = CLAMP(maxlod, 0, 16 * 11);
 262
 263       if (minlod > maxlod)
 264          maxlod = minlod;
 265
 266       cso->minlod = minlod;
 267       cso->maxlod = maxlod;
 268    }
 269
 270    {
 271       ubyte r = float_to_ubyte(sampler->border_color[0]);
 272       ubyte g = float_to_ubyte(sampler->border_color[1]);
 273       ubyte b = float_to_ubyte(sampler->border_color[2]);
 274       ubyte a = float_to_ubyte(sampler->border_color[3]);
 275       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 276    }
 277    return cso;
 278 }
 279
 280 static void i915_bind_sampler_states(struct pipe_context *pipe,
 281                                      unsigned num, void **sampler)
 282 {
 283    struct i915_context *i915 = i915_context(pipe);
 284    unsigned i;
 285
 286    assert(num <= PIPE_MAX_SAMPLERS);
 287
 288    /* Check for no-op */
 289    if (num == i915->num_samplers &&
 290        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 291       return;
 292
 293    draw_flush(i915->draw);
 294
 295    for (i = 0; i < num; ++i)
 296       i915->sampler[i] = sampler[i];
 297    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 298       i915->sampler[i] = NULL;
 299
 300    i915->num_samplers = num;
 301
 302    i915->dirty |= I915_NEW_SAMPLER;
 303 }
 304
 305 static void i915_delete_sampler_state(struct pipe_context *pipe,
 306                                       void *sampler)
 307 {
 308    FREE(sampler);
 309 }
 310
 311
 312 /** XXX move someday?  Or consolidate all these simple state setters
 313  * into one file.
 314  */
 315
 316 static void *
 317 i915_create_depth_stencil_state(struct pipe_context *pipe,
 318                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 319 {
 320    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 321
 322    {
 323       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 324       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 325
 326       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 327                               ENABLE_STENCIL_TEST_MASK |
 328                               STENCIL_TEST_MASK(testmask) |
 329                               ENABLE_STENCIL_WRITE_MASK |
 330                               STENCIL_WRITE_MASK(writemask));
 331    }
 332
 333    if (depth_stencil->stencil[0].enabled) {
 334       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 335       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 336       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 337       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 338       int ref  = depth_stencil->stencil[0].ref_value & 0xff;
 339
 340       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 341                             S5_STENCIL_WRITE_ENABLE |
 342                             (ref  << S5_STENCIL_REF_SHIFT) |
 343                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 344                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 345                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 346                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 347    }
 348
 349    if (depth_stencil->stencil[1].enabled) {
 350       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 351       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 352       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 353       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 354       int ref   = depth_stencil->stencil[1].ref_value & 0xff;
 355       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 356       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 357
 358       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 359                      BFO_ENABLE_STENCIL_FUNCS |
 360                      BFO_ENABLE_STENCIL_TWO_SIDE |
 361                      BFO_ENABLE_STENCIL_REF |
 362                      BFO_STENCIL_TWO_SIDE |
 363                      (ref  << BFO_STENCIL_REF_SHIFT) |
 364                      (test << BFO_STENCIL_TEST_SHIFT) |
 365                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 366                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 367                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 368
 369       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 370                      BFM_ENABLE_STENCIL_TEST_MASK |
 371                      BFM_ENABLE_STENCIL_WRITE_MASK |
 372                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 373                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 374    }
 375    else {
 376       /* This actually disables two-side stencil: The bit set is a
 377        * modify-enable bit to indicate we are changing the two-side
 378        * setting.  Then there is a symbolic zero to show that we are
 379        * setting the flag to zero/off.
 380        */
 381       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 382                      BFO_ENABLE_STENCIL_TWO_SIDE |
 383                      0);
 384       cso->bfo[1] = 0;
 385    }
 386
 387    if (depth_stencil->depth.enabled) {
 388       int func = i915_translate_compare_func(depth_stencil->depth.func);
 389
 390       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 391                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 392
 393       if (depth_stencil->depth.writemask)
 394          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 395    }
 396
 397    if (depth_stencil->alpha.enabled) {
 398       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 399       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 400
 401       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 402                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 403                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 404    }
 405
 406    return cso;
 407 }
 408
 409 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 410                                           void *depth_stencil)
 411 {
 412    struct i915_context *i915 = i915_context(pipe);
 413    draw_flush(i915->draw);
 414
 415    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 416
 417    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 418 }
 419
 420 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 421                                             void *depth_stencil)
 422 {
 423    FREE(depth_stencil);
 424 }
 425
 426
 427 static void i915_set_scissor_state( struct pipe_context *pipe,
 428                                  const struct pipe_scissor_state *scissor )
 429 {
 430    struct i915_context *i915 = i915_context(pipe);
 431    draw_flush(i915->draw);
 432
 433    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 434    i915->dirty |= I915_NEW_SCISSOR;
 435 }
 436
 437
 438 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 439                                    const struct pipe_poly_stipple *stipple )
 440 {
 441 }
 442
 443
 444
 445 static void *
 446 i915_create_fs_state(struct pipe_context *pipe,
 447                      const struct pipe_shader_state *templ)
 448 {
 449    struct i915_context *i915 = i915_context(pipe);
 450    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 451    if (!ifs)
 452       return NULL;
 453
 454    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 455
 456    tgsi_scan_shader(templ->tokens, &ifs->info);
 457
 458    /* The shader's compiled to i915 instructions here */
 459    i915_translate_fragment_program(i915, ifs);
 460
 461    return ifs;
 462 }
 463
 464 static void
 465 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 466 {
 467    struct i915_context *i915 = i915_context(pipe);
 468    draw_flush(i915->draw);
 469
 470    i915->fs = (struct i915_fragment_shader*) shader;
 471
 472    i915->dirty |= I915_NEW_FS;
 473 }
 474
 475 static
 476 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 477 {
 478    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 479
 480    if (ifs->program)
 481       FREE(ifs->program);
 482    ifs->program_len = 0;
 483
 484    FREE((struct tgsi_token *)ifs->state.tokens);
 485
 486    FREE(ifs);
 487 }
 488
 489
 490 static void *
 491 i915_create_vs_state(struct pipe_context *pipe,
 492                      const struct pipe_shader_state *templ)
 493 {
 494    struct i915_context *i915 = i915_context(pipe);
 495
 496    /* just pass-through to draw module */
 497    return draw_create_vertex_shader(i915->draw, templ);
 498 }
 499
 500 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 501 {
 502    struct i915_context *i915 = i915_context(pipe);
 503
 504    /* just pass-through to draw module */
 505    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 506
 507    i915->dirty |= I915_NEW_VS;
 508 }
 509
 510 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 511 {
 512    struct i915_context *i915 = i915_context(pipe);
 513
 514    /* just pass-through to draw module */
 515    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 516 }
 517
 518 static void i915_set_constant_buffer(struct pipe_context *pipe,
 519                                      uint shader, uint index,
 520                                      const struct pipe_buffer *buf)
 521 {
 522    struct i915_context *i915 = i915_context(pipe);
 523    struct pipe_screen *screen = pipe->screen;
 524    draw_flush(i915->draw);
 525
 526    assert(shader < PIPE_SHADER_TYPES);
 527    assert(index == 0);
 528
 529    /* Make a copy of shader constants.
 530     * During fragment program translation we may add additional
 531     * constants to the array.
 532     *
 533     * We want to consider the situation where some user constants
 534     * (ex: a material color) may change frequently but the shader program
 535     * stays the same.  In that case we should only be updating the first
 536     * N constants, leaving any extras from shader translation alone.
 537     */
 538    if (buf) {
 539       void *mapped;
 540       if (buf->size &&
 541           (mapped = pipe_buffer_map(screen, buf,
 542                                     PIPE_BUFFER_USAGE_CPU_READ))) {
 543          memcpy(i915->current.constants[shader], mapped, buf->size);
 544          pipe_buffer_unmap(screen, buf);
 545          i915->current.num_user_constants[shader]
 546             = buf->size / (4 * sizeof(float));
 547       }
 548       else {
 549          i915->current.num_user_constants[shader] = 0;
 550       }
 551    }
 552
 553    i915->dirty |= I915_NEW_CONSTANTS;
 554 }
 555
 556
 557 static void i915_set_sampler_textures(struct pipe_context *pipe,
 558                                       unsigned num,
 559                                       struct pipe_texture **texture)
 560 {
 561    struct i915_context *i915 = i915_context(pipe);
 562    uint i;
 563
 564    assert(num <= PIPE_MAX_SAMPLERS);
 565
 566    /* Check for no-op */
 567    if (num == i915->num_textures &&
 568        !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
 569       return;
 570
 571    /* Fixes wrong texture in texobj with VBUF */
 572    draw_flush(i915->draw);
 573
 574    for (i = 0; i < num; i++)
 575       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 576                              texture[i]);
 577
 578    for (i = num; i < i915->num_textures; i++)
 579       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 580                              NULL);
 581
 582    i915->num_textures = num;
 583
 584    i915->dirty |= I915_NEW_TEXTURE;
 585 }
 586
 587
 588
 589 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 590                                        const struct pipe_framebuffer_state *fb)
 591 {
 592    struct i915_context *i915 = i915_context(pipe);
 593    int i;
 594
 595    draw_flush(i915->draw);
 596
 597    i915->framebuffer.width = fb->width;
 598    i915->framebuffer.height = fb->height;
 599    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 600    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 601       pipe_surface_reference(&i915->framebuffer.cbufs[i], fb->cbufs[i]);
 602    }
 603    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 604
 605    i915->dirty |= I915_NEW_FRAMEBUFFER;
 606 }
 607
 608
 609
 610 static void i915_set_clip_state( struct pipe_context *pipe,
 611                              const struct pipe_clip_state *clip )
 612 {
 613    struct i915_context *i915 = i915_context(pipe);
 614    draw_flush(i915->draw);
 615
 616    draw_set_clip_state(i915->draw, clip);
 617
 618    i915->dirty |= I915_NEW_CLIP;
 619 }
 620
 621
 622
 623 /* Called when driver state tracker notices changes to the viewport
 624  * matrix:
 625  */
 626 static void i915_set_viewport_state( struct pipe_context *pipe,
 627                                      const struct pipe_viewport_state *viewport )
 628 {
 629    struct i915_context *i915 = i915_context(pipe);
 630
 631    i915->viewport = *viewport; /* struct copy */
 632
 633    /* pass the viewport info to the draw module */
 634    draw_set_viewport_state(i915->draw, &i915->viewport);
 635
 636    i915->dirty |= I915_NEW_VIEWPORT;
 637 }
 638
 639
 640 static void *
 641 i915_create_rasterizer_state(struct pipe_context *pipe,
 642                              const struct pipe_rasterizer_state *rasterizer)
 643 {
 644    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 645
 646    cso->templ = rasterizer;
 647    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 648    cso->light_twoside = rasterizer->light_twoside;
 649    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 650    cso->ds[1].f = rasterizer->offset_scale;
 651    if (rasterizer->poly_stipple_enable) {
 652       cso->st |= ST1_ENABLE;
 653    }
 654
 655    if (rasterizer->scissor)
 656       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 657    else
 658       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 659
 660    switch (rasterizer->cull_mode) {
 661    case PIPE_WINDING_NONE:
 662       cso->LIS4 |= S4_CULLMODE_NONE;
 663       break;
 664    case PIPE_WINDING_CW:
 665       cso->LIS4 |= S4_CULLMODE_CW;
 666       break;
 667    case PIPE_WINDING_CCW:
 668       cso->LIS4 |= S4_CULLMODE_CCW;
 669       break;
 670    case PIPE_WINDING_BOTH:
 671       cso->LIS4 |= S4_CULLMODE_BOTH;
 672       break;
 673    }
 674
 675    {
 676       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 677
 678       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 679
 680       if (rasterizer->line_smooth)
 681          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 682    }
 683
 684    {
 685       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 686
 687       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 688    }
 689
 690    if (rasterizer->flatshade) {
 691       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 692                     S4_FLATSHADE_COLOR |
 693                     S4_FLATSHADE_SPECULAR);
 694    }
 695
 696    cso->LIS7 = fui( rasterizer->offset_units );
 697
 698
 699    return cso;
 700 }
 701
 702 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 703                                         void *raster )
 704 {
 705    struct i915_context *i915 = i915_context(pipe);
 706
 707    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 708
 709    /* pass-through to draw module */
 710    draw_set_rasterizer_state(i915->draw,
 711                           (i915->rasterizer ? i915->rasterizer->templ : NULL));
 712
 713    i915->dirty |= I915_NEW_RASTERIZER;
 714 }
 715
 716 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 717                                          void *raster)
 718 {
 719    FREE(raster);
 720 }
 721
 722 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 723                                     unsigned count,
 724                                     const struct pipe_vertex_buffer *buffers)
 725 {
 726    struct i915_context *i915 = i915_context(pipe);
 727    /* Because we change state before the draw_set_vertex_buffers call
 728     * we need a flush here, just to be sure.
 729     */
 730    draw_flush(i915->draw);
 731
 732    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 733    i915->num_vertex_buffers = count;
 734
 735    /* pass-through to draw module */
 736    draw_set_vertex_buffers(i915->draw, count, buffers);
 737 }
 738
 739 static void i915_set_vertex_elements(struct pipe_context *pipe,
 740                                      unsigned count,
 741                                      const struct pipe_vertex_element *elements)
 742 {
 743    struct i915_context *i915 = i915_context(pipe);
 744    /* Because we change state before the draw_set_vertex_buffers call
 745     * we need a flush here, just to be sure.
 746     */
 747    draw_flush(i915->draw);
 748
 749    i915->num_vertex_elements = count;
 750    /* pass-through to draw module */
 751    draw_set_vertex_elements(i915->draw, count, elements);
 752 }
 753
 754
 755 void
 756 i915_init_state_functions( struct i915_context *i915 )
 757 {
 758    i915->base.create_blend_state = i915_create_blend_state;
 759    i915->base.bind_blend_state = i915_bind_blend_state;
 760    i915->base.delete_blend_state = i915_delete_blend_state;
 761
 762    i915->base.create_sampler_state = i915_create_sampler_state;
 763    i915->base.bind_fragment_sampler_states = i915_bind_sampler_states;
 764    i915->base.delete_sampler_state = i915_delete_sampler_state;
 765
 766    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 767    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 768    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 769
 770    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
 771    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
 772    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
 773    i915->base.create_fs_state = i915_create_fs_state;
 774    i915->base.bind_fs_state = i915_bind_fs_state;
 775    i915->base.delete_fs_state = i915_delete_fs_state;
 776    i915->base.create_vs_state = i915_create_vs_state;
 777    i915->base.bind_vs_state = i915_bind_vs_state;
 778    i915->base.delete_vs_state = i915_delete_vs_state;
 779
 780    i915->base.set_blend_color = i915_set_blend_color;
 781    i915->base.set_clip_state = i915_set_clip_state;
 782    i915->base.set_constant_buffer = i915_set_constant_buffer;
 783    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
 784
 785    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
 786    i915->base.set_scissor_state = i915_set_scissor_state;
 787    i915->base.set_fragment_sampler_textures = i915_set_sampler_textures;
 788    i915->base.set_viewport_state = i915_set_viewport_state;
 789    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
 790    i915->base.set_vertex_elements = i915_set_vertex_elements;
 791 }