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
  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
 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
 198    i915->blend_color = *blend_color;
 199
 200    i915->dirty |= I915_NEW_BLEND;
 201 }
 202
 203 static void *
 204 i915_create_sampler_state(struct pipe_context *pipe,
 205                           const struct pipe_sampler_state *sampler)
 206 {
 207    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 208    const unsigned ws = sampler->wrap_s;
 209    const unsigned wt = sampler->wrap_t;
 210    const unsigned wr = sampler->wrap_r;
 211    unsigned minFilt, magFilt;
 212    unsigned mipFilt;
 213
 214    cso->templ = sampler;
 215
 216    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 217    minFilt = translate_img_filter( sampler->min_img_filter );
 218    magFilt = translate_img_filter( sampler->mag_img_filter );
 219
 220    if (sampler->max_anisotropy > 2.0) {
 221       cso->state[0] |= SS2_MAX_ANISO_4;
 222    }
 223
 224    {
 225       int b = (int) (sampler->lod_bias * 16.0);
 226       b = CLAMP(b, -256, 255);
 227       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 228    }
 229
 230    /* Shadow:
 231     */
 232    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 233    {
 234       cso->state[0] |= (SS2_SHADOW_ENABLE |
 235                         i915_translate_compare_func(sampler->compare_func));
 236
 237       minFilt = FILTER_4X4_FLAT;
 238       magFilt = FILTER_4X4_FLAT;
 239    }
 240
 241    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 242                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 243                      (magFilt << SS2_MAG_FILTER_SHIFT));
 244
 245    cso->state[1] |=
 246       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 247        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 248        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 249
 250    if (sampler->normalized_coords)
 251       cso->state[1] |= SS3_NORMALIZED_COORDS;
 252
 253    if (0) /* XXX not tested yet */
 254    {
 255       int minlod = (int) (16.0 * sampler->min_lod);
 256       minlod = CLAMP(minlod, 0, 16 * 11);
 257       cso->state[1] |= (minlod << SS3_MIN_LOD_SHIFT);
 258    }
 259
 260    {
 261       ubyte r = float_to_ubyte(sampler->border_color[0]);
 262       ubyte g = float_to_ubyte(sampler->border_color[1]);
 263       ubyte b = float_to_ubyte(sampler->border_color[2]);
 264       ubyte a = float_to_ubyte(sampler->border_color[3]);
 265       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 266    }
 267    return cso;
 268 }
 269
 270 static void i915_bind_sampler_states(struct pipe_context *pipe,
 271                                      unsigned num, void **sampler)
 272 {
 273    struct i915_context *i915 = i915_context(pipe);
 274    unsigned i;
 275
 276    assert(num <= PIPE_MAX_SAMPLERS);
 277
 278    /* Check for no-op */
 279    if (num == i915->num_samplers &&
 280        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 281       return;
 282
 283    for (i = 0; i < num; ++i)
 284       i915->sampler[i] = sampler[i];
 285    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 286       i915->sampler[i] = NULL;
 287
 288    i915->num_samplers = num;
 289
 290    i915->dirty |= I915_NEW_SAMPLER;
 291 }
 292
 293 static void i915_delete_sampler_state(struct pipe_context *pipe,
 294                                       void *sampler)
 295 {
 296    FREE(sampler);
 297 }
 298
 299
 300 /** XXX move someday?  Or consolidate all these simple state setters
 301  * into one file.
 302  */
 303
 304 static void *
 305 i915_create_depth_stencil_state(struct pipe_context *pipe,
 306                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 307 {
 308    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 309
 310    {
 311       int testmask = depth_stencil->stencil[0].value_mask & 0xff;
 312       int writemask = depth_stencil->stencil[0].write_mask & 0xff;
 313
 314       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 315                               ENABLE_STENCIL_TEST_MASK |
 316                               STENCIL_TEST_MASK(testmask) |
 317                               ENABLE_STENCIL_WRITE_MASK |
 318                               STENCIL_WRITE_MASK(writemask));
 319    }
 320
 321    if (depth_stencil->stencil[0].enabled) {
 322       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 323       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 324       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 325       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 326       int ref  = depth_stencil->stencil[0].ref_value & 0xff;
 327
 328       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 329                             S5_STENCIL_WRITE_ENABLE |
 330                             (ref  << S5_STENCIL_REF_SHIFT) |
 331                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 332                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 333                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 334                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 335    }
 336
 337    if (depth_stencil->stencil[1].enabled) {
 338       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 339       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 340       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 341       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 342       int ref   = depth_stencil->stencil[1].ref_value & 0xff;
 343       int tmask = depth_stencil->stencil[1].value_mask & 0xff;
 344       int wmask = depth_stencil->stencil[1].write_mask & 0xff;
 345
 346       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 347                      BFO_ENABLE_STENCIL_FUNCS |
 348                      BFO_ENABLE_STENCIL_TWO_SIDE |
 349                      BFO_ENABLE_STENCIL_REF |
 350                      BFO_STENCIL_TWO_SIDE |
 351                      (ref  << BFO_STENCIL_REF_SHIFT) |
 352                      (test << BFO_STENCIL_TEST_SHIFT) |
 353                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 354                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 355                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 356
 357       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 358                      BFM_ENABLE_STENCIL_TEST_MASK |
 359                      BFM_ENABLE_STENCIL_WRITE_MASK |
 360                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 361                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 362    }
 363    else {
 364       /* This actually disables two-side stencil: The bit set is a
 365        * modify-enable bit to indicate we are changing the two-side
 366        * setting.  Then there is a symbolic zero to show that we are
 367        * setting the flag to zero/off.
 368        */
 369       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 370                      BFO_ENABLE_STENCIL_TWO_SIDE |
 371                      0);
 372       cso->bfo[1] = 0;
 373    }
 374
 375    if (depth_stencil->depth.enabled) {
 376       int func = i915_translate_compare_func(depth_stencil->depth.func);
 377
 378       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 379                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 380
 381       if (depth_stencil->depth.writemask)
 382          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 383    }
 384
 385    if (depth_stencil->alpha.enabled) {
 386       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 387       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref);
 388
 389       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 390                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 391                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 392    }
 393
 394    return cso;
 395 }
 396
 397 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 398                                           void *depth_stencil)
 399 {
 400    struct i915_context *i915 = i915_context(pipe);
 401
 402    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 403
 404    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 405 }
 406
 407 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 408                                             void *depth_stencil)
 409 {
 410    FREE(depth_stencil);
 411 }
 412
 413
 414 static void i915_set_scissor_state( struct pipe_context *pipe,
 415                                  const struct pipe_scissor_state *scissor )
 416 {
 417    struct i915_context *i915 = i915_context(pipe);
 418
 419    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 420    i915->dirty |= I915_NEW_SCISSOR;
 421 }
 422
 423
 424 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 425                                    const struct pipe_poly_stipple *stipple )
 426 {
 427 }
 428
 429
 430
 431 static void *
 432 i915_create_fs_state(struct pipe_context *pipe,
 433                      const struct pipe_shader_state *templ)
 434 {
 435    struct i915_context *i915 = i915_context(pipe);
 436    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 437    if (!ifs)
 438       return NULL;
 439
 440    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 441
 442    tgsi_scan_shader(templ->tokens, &ifs->info);
 443
 444    /* The shader's compiled to i915 instructions here */
 445    i915_translate_fragment_program(i915, ifs);
 446
 447    return ifs;
 448 }
 449
 450 static void
 451 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 452 {
 453    struct i915_context *i915 = i915_context(pipe);
 454
 455    i915->fs = (struct i915_fragment_shader*) shader;
 456
 457    i915->dirty |= I915_NEW_FS;
 458 }
 459
 460 static
 461 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 462 {
 463    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 464
 465    if (ifs->program)
 466       FREE(ifs->program);
 467    ifs->program_len = 0;
 468
 469    FREE((struct tgsi_token *)ifs->state.tokens);
 470
 471    FREE(ifs);
 472 }
 473
 474
 475 static void *
 476 i915_create_vs_state(struct pipe_context *pipe,
 477                      const struct pipe_shader_state *templ)
 478 {
 479    struct i915_context *i915 = i915_context(pipe);
 480
 481    /* just pass-through to draw module */
 482    return draw_create_vertex_shader(i915->draw, templ);
 483 }
 484
 485 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 486 {
 487    struct i915_context *i915 = i915_context(pipe);
 488
 489    /* just pass-through to draw module */
 490    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 491
 492    i915->dirty |= I915_NEW_VS;
 493 }
 494
 495 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 496 {
 497    struct i915_context *i915 = i915_context(pipe);
 498
 499    /* just pass-through to draw module */
 500    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 501 }
 502
 503 static void i915_set_constant_buffer(struct pipe_context *pipe,
 504                                      uint shader, uint index,
 505                                      const struct pipe_constant_buffer *buf)
 506 {
 507    struct i915_context *i915 = i915_context(pipe);
 508    struct pipe_winsys *ws = pipe->winsys;
 509
 510    assert(shader < PIPE_SHADER_TYPES);
 511    assert(index == 0);
 512
 513    /* Make a copy of shader constants.
 514     * During fragment program translation we may add additional
 515     * constants to the array.
 516     *
 517     * We want to consider the situation where some user constants
 518     * (ex: a material color) may change frequently but the shader program
 519     * stays the same.  In that case we should only be updating the first
 520     * N constants, leaving any extras from shader translation alone.
 521     */
 522    if (buf) {
 523       void *mapped;
 524       if (buf->size &&
 525           (mapped = ws->buffer_map(ws, buf->buffer,
 526                                    PIPE_BUFFER_USAGE_CPU_READ))) {
 527          memcpy(i915->current.constants[shader], mapped, buf->size);
 528          ws->buffer_unmap(ws, buf->buffer);
 529          i915->current.num_user_constants[shader]
 530             = buf->size / (4 * sizeof(float));
 531       }
 532       else {
 533          i915->current.num_user_constants[shader] = 0;
 534       }
 535    }
 536
 537    i915->dirty |= I915_NEW_CONSTANTS;
 538 }
 539
 540
 541 static void i915_set_sampler_textures(struct pipe_context *pipe,
 542                                       unsigned num,
 543                                       struct pipe_texture **texture)
 544 {
 545    struct i915_context *i915 = i915_context(pipe);
 546    uint i;
 547
 548    assert(num <= PIPE_MAX_SAMPLERS);
 549
 550    /* Check for no-op */
 551    if (num == i915->num_textures &&
 552        !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
 553       return;
 554
 555    /* Fixes wrong texture in texobj with VBUF */
 556    draw_flush(i915->draw);
 557
 558    for (i = 0; i < num; i++)
 559       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 560                              texture[i]);
 561
 562    for (i = num; i < i915->num_textures; i++)
 563       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 564                              NULL);
 565
 566    i915->num_textures = num;
 567
 568    i915->dirty |= I915_NEW_TEXTURE;
 569 }
 570
 571
 572
 573 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 574                                        const struct pipe_framebuffer_state *fb)
 575 {
 576    struct i915_context *i915 = i915_context(pipe);
 577
 578    i915->framebuffer = *fb; /* struct copy */
 579
 580    i915->dirty |= I915_NEW_FRAMEBUFFER;
 581 }
 582
 583
 584
 585 static void i915_set_clip_state( struct pipe_context *pipe,
 586                              const struct pipe_clip_state *clip )
 587 {
 588    struct i915_context *i915 = i915_context(pipe);
 589
 590    draw_set_clip_state(i915->draw, clip);
 591
 592    i915->dirty |= I915_NEW_CLIP;
 593 }
 594
 595
 596
 597 /* Called when driver state tracker notices changes to the viewport
 598  * matrix:
 599  */
 600 static void i915_set_viewport_state( struct pipe_context *pipe,
 601                                      const struct pipe_viewport_state *viewport )
 602 {
 603    struct i915_context *i915 = i915_context(pipe);
 604
 605    i915->viewport = *viewport; /* struct copy */
 606
 607    /* pass the viewport info to the draw module */
 608    draw_set_viewport_state(i915->draw, &i915->viewport);
 609
 610    i915->dirty |= I915_NEW_VIEWPORT;
 611 }
 612
 613
 614 static void *
 615 i915_create_rasterizer_state(struct pipe_context *pipe,
 616                              const struct pipe_rasterizer_state *rasterizer)
 617 {
 618    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 619
 620    cso->templ = rasterizer;
 621    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 622    cso->light_twoside = rasterizer->light_twoside;
 623    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 624    cso->ds[1].f = rasterizer->offset_scale;
 625    if (rasterizer->poly_stipple_enable) {
 626       cso->st |= ST1_ENABLE;
 627    }
 628
 629    if (rasterizer->scissor)
 630       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 631    else
 632       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 633
 634    switch (rasterizer->cull_mode) {
 635    case PIPE_WINDING_NONE:
 636       cso->LIS4 |= S4_CULLMODE_NONE;
 637       break;
 638    case PIPE_WINDING_CW:
 639       cso->LIS4 |= S4_CULLMODE_CW;
 640       break;
 641    case PIPE_WINDING_CCW:
 642       cso->LIS4 |= S4_CULLMODE_CCW;
 643       break;
 644    case PIPE_WINDING_BOTH:
 645       cso->LIS4 |= S4_CULLMODE_BOTH;
 646       break;
 647    }
 648
 649    {
 650       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 651
 652       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 653
 654       if (rasterizer->line_smooth)
 655          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 656    }
 657
 658    {
 659       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 660
 661       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 662    }
 663
 664    if (rasterizer->flatshade) {
 665       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 666                     S4_FLATSHADE_COLOR |
 667                     S4_FLATSHADE_SPECULAR);
 668    }
 669
 670    cso->LIS7 = fui( rasterizer->offset_units );
 671
 672
 673    return cso;
 674 }
 675
 676 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 677                                         void *raster )
 678 {
 679    struct i915_context *i915 = i915_context(pipe);
 680
 681    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 682
 683    /* pass-through to draw module */
 684    draw_set_rasterizer_state(i915->draw,
 685                           (i915->rasterizer ? i915->rasterizer->templ : NULL));
 686
 687    i915->dirty |= I915_NEW_RASTERIZER;
 688 }
 689
 690 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 691                                          void *raster)
 692 {
 693    FREE(raster);
 694 }
 695
 696 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 697                                     unsigned count,
 698                                     const struct pipe_vertex_buffer *buffers)
 699 {
 700    struct i915_context *i915 = i915_context(pipe);
 701
 702    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 703    i915->num_vertex_buffers = count;
 704
 705    /* pass-through to draw module */
 706    draw_set_vertex_buffers(i915->draw, count, buffers);
 707 }
 708
 709 static void i915_set_vertex_elements(struct pipe_context *pipe,
 710                                      unsigned count,
 711                                      const struct pipe_vertex_element *elements)
 712 {
 713    struct i915_context *i915 = i915_context(pipe);
 714    i915->num_vertex_elements = count;
 715    /* pass-through to draw module */
 716    draw_set_vertex_elements(i915->draw, count, elements);
 717 }
 718
 719
 720
 721 void
 722 i915_init_state_functions( struct i915_context *i915 )
 723 {
 724    i915->pipe.create_blend_state = i915_create_blend_state;
 725    i915->pipe.bind_blend_state = i915_bind_blend_state;
 726    i915->pipe.delete_blend_state = i915_delete_blend_state;
 727
 728    i915->pipe.create_sampler_state = i915_create_sampler_state;
 729    i915->pipe.bind_sampler_states = i915_bind_sampler_states;
 730    i915->pipe.delete_sampler_state = i915_delete_sampler_state;
 731
 732    i915->pipe.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 733    i915->pipe.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 734    i915->pipe.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 735
 736    i915->pipe.create_rasterizer_state = i915_create_rasterizer_state;
 737    i915->pipe.bind_rasterizer_state = i915_bind_rasterizer_state;
 738    i915->pipe.delete_rasterizer_state = i915_delete_rasterizer_state;
 739    i915->pipe.create_fs_state = i915_create_fs_state;
 740    i915->pipe.bind_fs_state = i915_bind_fs_state;
 741    i915->pipe.delete_fs_state = i915_delete_fs_state;
 742    i915->pipe.create_vs_state = i915_create_vs_state;
 743    i915->pipe.bind_vs_state = i915_bind_vs_state;
 744    i915->pipe.delete_vs_state = i915_delete_vs_state;
 745
 746    i915->pipe.set_blend_color = i915_set_blend_color;
 747    i915->pipe.set_clip_state = i915_set_clip_state;
 748    i915->pipe.set_constant_buffer = i915_set_constant_buffer;
 749    i915->pipe.set_framebuffer_state = i915_set_framebuffer_state;
 750
 751    i915->pipe.set_polygon_stipple = i915_set_polygon_stipple;
 752    i915->pipe.set_scissor_state = i915_set_scissor_state;
 753    i915->pipe.set_sampler_textures = i915_set_sampler_textures;
 754    i915->pipe.set_viewport_state = i915_set_viewport_state;
 755    i915->pipe.set_vertex_buffers = i915_set_vertex_buffers;
 756    i915->pipe.set_vertex_elements = i915_set_vertex_elements;
 757 }