src/mesa/pipe/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 "pipe/draw/draw_context.h"
  33 #include "pipe/p_winsys.h"
  34 #include "pipe/p_util.h"
  35
  36 #include "i915_context.h"
  37 #include "i915_reg.h"
  38 #include "i915_state.h"
  39 #include "i915_state_inlines.h"
  40
  41
  42 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  43  * Intel drivers for "other operating systems" implement GL_CLAMP as
  44  * GL_CLAMP_TO_EDGE, so the same is done here.
  45  */
  46 static unsigned
  47 translate_wrap_mode(unsigned wrap)
  48 {
  49    switch (wrap) {
  50    case PIPE_TEX_WRAP_REPEAT:
  51       return TEXCOORDMODE_WRAP;
  52    case PIPE_TEX_WRAP_CLAMP:
  53       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  54    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  55       return TEXCOORDMODE_CLAMP_EDGE;
  56    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  57       return TEXCOORDMODE_CLAMP_BORDER;
  58 //   case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  59 //      return TEXCOORDMODE_MIRROR;
  60    default:
  61       return TEXCOORDMODE_WRAP;
  62    }
  63 }
  64
  65 static unsigned translate_img_filter( unsigned filter )
  66 {
  67    switch (filter) {
  68    case PIPE_TEX_FILTER_NEAREST:
  69       return FILTER_NEAREST;
  70    case PIPE_TEX_FILTER_LINEAR:
  71       return FILTER_LINEAR;
  72    default:
  73       assert(0);
  74       return FILTER_NEAREST;
  75    }
  76 }
  77
  78 static unsigned translate_mip_filter( unsigned filter )
  79 {
  80    switch (filter) {
  81    case PIPE_TEX_MIPFILTER_NONE:
  82       return MIPFILTER_NONE;
  83    case PIPE_TEX_MIPFILTER_NEAREST:
  84       return MIPFILTER_NEAREST;
  85    case PIPE_TEX_FILTER_LINEAR:
  86       return MIPFILTER_LINEAR;
  87    default:
  88       assert(0);
  89       return MIPFILTER_NONE;
  90    }
  91 }
  92
  93
  94 /* None of this state is actually used for anything yet.
  95  */
  96 static void *
  97 i915_create_blend_state(struct pipe_context *pipe,
  98                         const struct pipe_blend_state *blend)
  99 {
 100    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 101
 102    {
 103       unsigned eqRGB  = blend->rgb_func;
 104       unsigned srcRGB = blend->rgb_src_factor;
 105       unsigned dstRGB = blend->rgb_dst_factor;
 106
 107       unsigned eqA    = blend->alpha_func;
 108       unsigned srcA   = blend->alpha_src_factor;
 109       unsigned dstA   = blend->alpha_dst_factor;
 110
 111       /* Special handling for MIN/MAX filter modes handled at
 112        * state_tracker level.
 113        */
 114
 115       if (srcA != srcRGB ||
 116           dstA != dstRGB ||
 117           eqA != eqRGB) {
 118
 119          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 120                           IAB_MODIFY_ENABLE |
 121                           IAB_ENABLE |
 122                           IAB_MODIFY_FUNC |
 123                           IAB_MODIFY_SRC_FACTOR |
 124                           IAB_MODIFY_DST_FACTOR |
 125                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 126                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 127                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 128       }
 129       else {
 130          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 131                           IAB_MODIFY_ENABLE |
 132                           0);
 133       }
 134    }
 135
 136    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 137                         ENABLE_LOGIC_OP_FUNC |
 138                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 139
 140    if (blend->logicop_enable)
 141       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 142
 143    if (blend->dither)
 144       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 145
 146    if ((blend->colormask & PIPE_MASK_R) == 0)
 147       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 148
 149    if ((blend->colormask & PIPE_MASK_G) == 0)
 150       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 151
 152    if ((blend->colormask & PIPE_MASK_B) == 0)
 153       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 154
 155    if ((blend->colormask & PIPE_MASK_A) == 0)
 156       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 157
 158    if (blend->blend_enable) {
 159       unsigned funcRGB = blend->rgb_func;
 160       unsigned srcRGB  = blend->rgb_src_factor;
 161       unsigned dstRGB  = blend->rgb_dst_factor;
 162
 163       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 164                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 165                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 166                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 167    }
 168
 169    return cso_data;
 170 }
 171
 172 static void i915_bind_blend_state(struct pipe_context *pipe,
 173                                   void *blend)
 174 {
 175    struct i915_context *i915 = i915_context(pipe);
 176
 177    i915->blend = (struct i915_blend_state*)blend;
 178
 179    i915->dirty |= I915_NEW_BLEND;
 180 }
 181
 182
 183 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 184 {
 185    FREE(blend);
 186 }
 187
 188 static void i915_set_blend_color( struct pipe_context *pipe,
 189                              const struct pipe_blend_color *blend_color )
 190 {
 191    struct i915_context *i915 = i915_context(pipe);
 192
 193    i915->blend_color = *blend_color;
 194
 195    i915->dirty |= I915_NEW_BLEND;
 196 }
 197
 198 static void *
 199 i915_create_sampler_state(struct pipe_context *pipe,
 200                           const struct pipe_sampler_state *sampler)
 201 {
 202    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 203    const unsigned ws = sampler->wrap_s;
 204    const unsigned wt = sampler->wrap_t;
 205    const unsigned wr = sampler->wrap_r;
 206    unsigned minFilt, magFilt;
 207    unsigned mipFilt;
 208
 209    cso->templ = sampler;
 210
 211    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 212    if (sampler->max_anisotropy > 1.0) {
 213       minFilt = FILTER_ANISOTROPIC;
 214       magFilt = FILTER_ANISOTROPIC;
 215       if (sampler->max_anisotropy > 2.0) {
 216          cso->state[0] |= SS2_MAX_ANISO_4;
 217       }
 218    }
 219    else {
 220       minFilt = translate_img_filter( sampler->min_img_filter );
 221       magFilt = translate_img_filter( sampler->mag_img_filter );
 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    {
 254       ubyte r = float_to_ubyte(sampler->border_color[0]);
 255       ubyte g = float_to_ubyte(sampler->border_color[1]);
 256       ubyte b = float_to_ubyte(sampler->border_color[2]);
 257       ubyte a = float_to_ubyte(sampler->border_color[3]);
 258       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 259    }
 260    return cso;
 261 }
 262
 263 static void i915_bind_sampler_state(struct pipe_context *pipe,
 264                                     unsigned unit, void *sampler)
 265 {
 266    struct i915_context *i915 = i915_context(pipe);
 267
 268    assert(unit < PIPE_MAX_SAMPLERS);
 269    i915->sampler[unit] = (const struct i915_sampler_state*)sampler;
 270
 271    i915->dirty |= I915_NEW_SAMPLER;
 272 }
 273
 274 static void i915_delete_sampler_state(struct pipe_context *pipe,
 275                                       void *sampler)
 276 {
 277    FREE(sampler);
 278 }
 279
 280
 281 /** XXX move someday?  Or consolidate all these simple state setters
 282  * into one file.
 283  */
 284
 285 static void *
 286 i915_create_depth_stencil_state(struct pipe_context *pipe,
 287                            const struct pipe_depth_stencil_state *depth_stencil)
 288 {
 289    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 290
 291    {
 292       int testmask = depth_stencil->stencil.value_mask[0] & 0xff;
 293       int writemask = depth_stencil->stencil.write_mask[0] & 0xff;
 294
 295       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 296                               ENABLE_STENCIL_TEST_MASK |
 297                               STENCIL_TEST_MASK(testmask) |
 298                               ENABLE_STENCIL_WRITE_MASK |
 299                               STENCIL_WRITE_MASK(writemask));
 300    }
 301
 302    if (depth_stencil->stencil.front_enabled) {
 303       int test = i915_translate_compare_func(depth_stencil->stencil.front_func);
 304       int fop  = i915_translate_stencil_op(depth_stencil->stencil.front_fail_op);
 305       int dfop = i915_translate_stencil_op(depth_stencil->stencil.front_zfail_op);
 306       int dpop = i915_translate_stencil_op(depth_stencil->stencil.front_zpass_op);
 307       int ref  = depth_stencil->stencil.ref_value[0] & 0xff;
 308
 309       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 310                             S5_STENCIL_WRITE_ENABLE |
 311                             (ref  << S5_STENCIL_REF_SHIFT) |
 312                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 313                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 314                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 315                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 316    }
 317
 318    if (depth_stencil->stencil.back_enabled) {
 319       int test  = i915_translate_compare_func(depth_stencil->stencil.back_func);
 320       int fop   = i915_translate_stencil_op(depth_stencil->stencil.back_fail_op);
 321       int dfop  = i915_translate_stencil_op(depth_stencil->stencil.back_zfail_op);
 322       int dpop  = i915_translate_stencil_op(depth_stencil->stencil.back_zpass_op);
 323       int ref   = depth_stencil->stencil.ref_value[1] & 0xff;
 324       int tmask = depth_stencil->stencil.value_mask[1] & 0xff;
 325       int wmask = depth_stencil->stencil.write_mask[1] & 0xff;
 326
 327       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 328                      BFO_ENABLE_STENCIL_FUNCS |
 329                      BFO_ENABLE_STENCIL_TWO_SIDE |
 330                      BFO_ENABLE_STENCIL_REF |
 331                      BFO_STENCIL_TWO_SIDE |
 332                      (ref  << BFO_STENCIL_REF_SHIFT) |
 333                      (test << BFO_STENCIL_TEST_SHIFT) |
 334                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 335                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 336                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 337
 338       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 339                      BFM_ENABLE_STENCIL_TEST_MASK |
 340                      BFM_ENABLE_STENCIL_WRITE_MASK |
 341                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 342                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 343    }
 344    else {
 345       /* This actually disables two-side stencil: The bit set is a
 346        * modify-enable bit to indicate we are changing the two-side
 347        * setting.  Then there is a symbolic zero to show that we are
 348        * setting the flag to zero/off.
 349        */
 350       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 351                      BFO_ENABLE_STENCIL_TWO_SIDE |
 352                      0);
 353       cso->bfo[1] = 0;
 354    }
 355
 356    if (depth_stencil->depth.enabled) {
 357       int func = i915_translate_compare_func(depth_stencil->depth.func);
 358
 359       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 360                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 361
 362       if (depth_stencil->depth.writemask)
 363          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 364    }
 365
 366    return cso;
 367 }
 368
 369 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 370                                           void *depth_stencil)
 371 {
 372    struct i915_context *i915 = i915_context(pipe);
 373
 374    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 375
 376    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 377 }
 378
 379 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 380                                             void *depth_stencil)
 381 {
 382    FREE(depth_stencil);
 383 }
 384
 385
 386 static void *
 387 i915_create_alpha_test_state(struct pipe_context *pipe,
 388                              const struct pipe_alpha_test_state *alpha_test)
 389 {
 390    struct i915_alpha_test_state *cso = CALLOC_STRUCT( i915_alpha_test_state );
 391
 392    if (alpha_test->enabled) {
 393       int test = i915_translate_compare_func(alpha_test->func);
 394       ubyte refByte = float_to_ubyte(alpha_test->ref);
 395
 396       cso->LIS6 |= (S6_ALPHA_TEST_ENABLE |
 397                     (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 398                     (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 399    }
 400    return cso;
 401 }
 402
 403 static void i915_bind_alpha_test_state(struct pipe_context *pipe,
 404                                        void *alpha)
 405 {
 406    struct i915_context *i915 = i915_context(pipe);
 407
 408    i915->alpha_test = (const struct i915_alpha_test_state*)alpha;
 409
 410    i915->dirty |= I915_NEW_ALPHA_TEST;
 411 }
 412
 413 static void i915_delete_alpha_test_state(struct pipe_context *pipe,
 414                                          void *alpha)
 415 {
 416    FREE(alpha);
 417 }
 418
 419 static void i915_set_scissor_state( struct pipe_context *pipe,
 420                                  const struct pipe_scissor_state *scissor )
 421 {
 422    struct i915_context *i915 = i915_context(pipe);
 423
 424    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 425    i915->dirty |= I915_NEW_SCISSOR;
 426 }
 427
 428
 429 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 430                                    const struct pipe_poly_stipple *stipple )
 431 {
 432 }
 433
 434 static void i915_set_sampler_units(struct pipe_context *pipe,
 435                                    uint numSamplers, const uint *units)
 436 {
 437    struct i915_context *i915 = i915_context(pipe);
 438    uint i;
 439    for (i = 0; i < numSamplers; i++)
 440       i915->sampler_units[i] = units[i];
 441 }
 442
 443 static void * i915_create_fs_state(struct pipe_context *pipe,
 444                                    const struct pipe_shader_state *templ)
 445 {
 446    return 0;
 447 }
 448
 449 static void i915_bind_fs_state(struct pipe_context *pipe, void *fs)
 450 {
 451    struct i915_context *i915 = i915_context(pipe);
 452
 453    i915->fs = (struct pipe_shader_state *)fs;
 454
 455    i915->dirty |= I915_NEW_FS;
 456 }
 457
 458 static void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 459 {
 460    /*do nothing*/
 461 }
 462
 463 static void *
 464 i915_create_vs_state(struct pipe_context *pipe,
 465                      const struct pipe_shader_state *templ)
 466 {
 467    struct i915_context *i915 = i915_context(pipe);
 468
 469    /* just pass-through to draw module */
 470    return draw_create_vertex_shader(i915->draw, templ);
 471 }
 472
 473 static void i915_bind_vs_state(struct pipe_context *pipe, void *vs)
 474 {
 475    struct i915_context *i915 = i915_context(pipe);
 476
 477    /* just pass-through to draw module */
 478    draw_bind_vertex_shader(i915->draw, vs);
 479 }
 480
 481 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 482 {
 483    struct i915_context *i915 = i915_context(pipe);
 484
 485    /* just pass-through to draw module */
 486    draw_delete_vertex_shader(i915->draw, shader);
 487 }
 488
 489 static void i915_set_constant_buffer(struct pipe_context *pipe,
 490                                      uint shader, uint index,
 491                                      const struct pipe_constant_buffer *buf)
 492 {
 493    struct i915_context *i915 = i915_context(pipe);
 494    struct pipe_winsys *ws = pipe->winsys;
 495
 496    assert(shader < PIPE_SHADER_TYPES);
 497    assert(index == 0);
 498
 499    /* Make a copy of shader constants.
 500     * During fragment program translation we may add additional
 501     * constants to the array.
 502     *
 503     * We want to consider the situation where some user constants
 504     * (ex: a material color) may change frequently but the shader program
 505     * stays the same.  In that case we should only be updating the first
 506     * N constants, leaving any extras from shader translation alone.
 507     */
 508    {
 509       void *mapped;
 510       if (buf->size &&
 511           (mapped = ws->buffer_map(ws, buf->buffer, PIPE_BUFFER_FLAG_READ))) {
 512          memcpy(i915->current.constants[shader], mapped, buf->size);
 513          ws->buffer_unmap(ws, buf->buffer);
 514          i915->current.num_user_constants[shader]
 515             = buf->size / (4 * sizeof(float));
 516       }
 517       else {
 518          i915->current.num_user_constants[shader] = 0;
 519       }
 520    }
 521
 522    i915->dirty |= I915_NEW_CONSTANTS;
 523 }
 524
 525
 526 static void i915_set_texture_state(struct pipe_context *pipe,
 527                                    unsigned unit,
 528                                    struct pipe_texture *texture)
 529 {
 530    struct i915_context *i915 = i915_context(pipe);
 531
 532    i915->texture[unit] = (struct i915_texture*)texture;  /* ptr, not struct */
 533
 534    i915->dirty |= I915_NEW_TEXTURE;
 535 }
 536
 537
 538
 539 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 540                                        const struct pipe_framebuffer_state *fb)
 541 {
 542    struct i915_context *i915 = i915_context(pipe);
 543
 544    i915->framebuffer = *fb; /* struct copy */
 545
 546    i915->dirty |= I915_NEW_FRAMEBUFFER;
 547 }
 548
 549
 550 static void
 551 i915_set_feedback_state(struct pipe_context *pipe,
 552                         const struct pipe_feedback_state *feedback)
 553 {
 554    struct i915_context *i915 = i915_context(pipe);
 555    i915->feedback = *feedback;
 556    draw_set_feedback_state(i915->draw, feedback);
 557 }
 558
 559
 560 static void
 561 i915_set_feedback_buffer(struct pipe_context *pipe,
 562                              unsigned index,
 563                              const struct pipe_feedback_buffer *feedback)
 564 {
 565    struct i915_context *i915 = i915_context(pipe);
 566
 567    assert(index < PIPE_MAX_FEEDBACK_ATTRIBS);
 568
 569    /* Need to be careful with referencing */
 570    pipe->winsys->buffer_reference(pipe->winsys,
 571                                   &i915->feedback_buffer[index].buffer,
 572                                   feedback->buffer);
 573    i915->feedback_buffer[index].size = feedback->size;
 574    i915->feedback_buffer[index].start_offset = feedback->start_offset;
 575 }
 576
 577
 578
 579 static void i915_set_clear_color_state(struct pipe_context *pipe,
 580                                const struct pipe_clear_color_state *clear)
 581 {
 582    struct i915_context *i915 = i915_context(pipe);
 583
 584    i915->clear_color = *clear; /* struct copy */
 585 }
 586
 587
 588
 589 static void i915_set_clip_state( struct pipe_context *pipe,
 590                              const struct pipe_clip_state *clip )
 591 {
 592    struct i915_context *i915 = i915_context(pipe);
 593
 594    draw_set_clip_state(i915->draw, clip);
 595
 596    i915->dirty |= I915_NEW_CLIP;
 597 }
 598
 599
 600
 601 /* Called when driver state tracker notices changes to the viewport
 602  * matrix:
 603  */
 604 static void i915_set_viewport_state( struct pipe_context *pipe,
 605                                      const struct pipe_viewport_state *viewport )
 606 {
 607    struct i915_context *i915 = i915_context(pipe);
 608
 609    i915->viewport = *viewport; /* struct copy */
 610
 611    /* pass the viewport info to the draw module */
 612    draw_set_viewport_state(i915->draw, &i915->viewport);
 613
 614    i915->dirty |= I915_NEW_VIEWPORT;
 615 }
 616
 617
 618 static void *
 619 i915_create_rasterizer_state(struct pipe_context *pipe,
 620                              const struct pipe_rasterizer_state *rasterizer)
 621 {
 622    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 623
 624    cso->templ = rasterizer;
 625    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 626    cso->light_twoside = rasterizer->light_twoside;
 627    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 628    cso->ds[1].f = rasterizer->offset_scale;
 629    if (rasterizer->poly_stipple_enable) {
 630       cso->st |= ST1_ENABLE;
 631    }
 632
 633    if (rasterizer->scissor)
 634       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 635    else
 636       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 637
 638    switch (rasterizer->cull_mode) {
 639    case PIPE_WINDING_NONE:
 640       cso->LIS4 |= S4_CULLMODE_NONE;
 641       break;
 642    case PIPE_WINDING_CW:
 643       cso->LIS4 |= S4_CULLMODE_CW;
 644       break;
 645    case PIPE_WINDING_CCW:
 646       cso->LIS4 |= S4_CULLMODE_CCW;
 647       break;
 648    case PIPE_WINDING_BOTH:
 649       cso->LIS4 |= S4_CULLMODE_BOTH;
 650       break;
 651    }
 652
 653    {
 654       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 655
 656       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 657
 658       if (rasterizer->line_smooth)
 659          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 660    }
 661
 662    {
 663       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 664
 665       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 666    }
 667
 668    if (rasterizer->flatshade) {
 669       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 670                     S4_FLATSHADE_COLOR |
 671                     S4_FLATSHADE_SPECULAR);
 672    }
 673
 674    cso->LIS7 = fui( rasterizer->offset_units );
 675
 676
 677    return cso;
 678 }
 679
 680 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 681                                         void *setup )
 682 {
 683    struct i915_context *i915 = i915_context(pipe);
 684
 685    i915->rasterizer = (struct i915_rasterizer_state *)setup;
 686
 687    /* pass-through to draw module */
 688    draw_set_rasterizer_state(i915->draw, i915->rasterizer->templ);
 689
 690    i915->dirty |= I915_NEW_RASTERIZER;
 691 }
 692
 693 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 694                                          void *setup)
 695 {
 696    FREE(setup);
 697 }
 698
 699 static void i915_set_vertex_buffer( struct pipe_context *pipe,
 700                                     unsigned index,
 701                                     const struct pipe_vertex_buffer *buffer )
 702 {
 703    struct i915_context *i915 = i915_context(pipe);
 704    i915->vertex_buffer[index] = *buffer;
 705    /* pass-through to draw module */
 706    draw_set_vertex_buffer(i915->draw, index, buffer);
 707 }
 708
 709 static void i915_set_vertex_element( struct pipe_context *pipe,
 710                                      unsigned index,
 711                                      const struct pipe_vertex_element *element)
 712 {
 713    struct i915_context *i915 = i915_context(pipe);
 714    /* pass-through to draw module */
 715    draw_set_vertex_element(i915->draw, index, element);
 716 }
 717
 718
 719
 720 void
 721 i915_init_state_functions( struct i915_context *i915 )
 722 {
 723    i915->pipe.create_alpha_test_state = i915_create_alpha_test_state;
 724    i915->pipe.bind_alpha_test_state   = i915_bind_alpha_test_state;
 725    i915->pipe.delete_alpha_test_state = i915_delete_alpha_test_state;
 726
 727    i915->pipe.create_blend_state = i915_create_blend_state;
 728    i915->pipe.bind_blend_state = i915_bind_blend_state;
 729    i915->pipe.delete_blend_state = i915_delete_blend_state;
 730
 731    i915->pipe.create_sampler_state = i915_create_sampler_state;
 732    i915->pipe.bind_sampler_state = i915_bind_sampler_state;
 733    i915->pipe.delete_sampler_state = i915_delete_sampler_state;
 734
 735    i915->pipe.create_depth_stencil_state = i915_create_depth_stencil_state;
 736    i915->pipe.bind_depth_stencil_state = i915_bind_depth_stencil_state;
 737    i915->pipe.delete_depth_stencil_state = i915_delete_depth_stencil_state;
 738
 739    i915->pipe.create_rasterizer_state = i915_create_rasterizer_state;
 740    i915->pipe.bind_rasterizer_state = i915_bind_rasterizer_state;
 741    i915->pipe.delete_rasterizer_state = i915_delete_rasterizer_state;
 742    i915->pipe.create_fs_state = i915_create_fs_state;
 743    i915->pipe.bind_fs_state = i915_bind_fs_state;
 744    i915->pipe.delete_fs_state = i915_delete_fs_state;
 745    i915->pipe.create_vs_state = i915_create_vs_state;
 746    i915->pipe.bind_vs_state = i915_bind_vs_state;
 747    i915->pipe.delete_vs_state = i915_delete_vs_state;
 748
 749    i915->pipe.set_blend_color = i915_set_blend_color;
 750    i915->pipe.set_clip_state = i915_set_clip_state;
 751    i915->pipe.set_clear_color_state = i915_set_clear_color_state;
 752    i915->pipe.set_constant_buffer = i915_set_constant_buffer;
 753    i915->pipe.set_framebuffer_state = i915_set_framebuffer_state;
 754    i915->pipe.set_feedback_state = i915_set_feedback_state;
 755    i915->pipe.set_feedback_buffer = i915_set_feedback_buffer;
 756
 757    i915->pipe.set_polygon_stipple = i915_set_polygon_stipple;
 758    i915->pipe.set_sampler_units = i915_set_sampler_units;
 759    i915->pipe.set_scissor_state = i915_set_scissor_state;
 760    i915->pipe.set_texture_state = i915_set_texture_state;
 761    i915->pipe.set_viewport_state = i915_set_viewport_state;
 762    i915->pipe.set_vertex_buffer = i915_set_vertex_buffer;
 763    i915->pipe.set_vertex_element = i915_set_vertex_element;
 764 }