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/p_inlines.h"
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36 #include "tgsi/tgsi_parse.h"
  37
  38 #include "i915_context.h"
  39 #include "i915_reg.h"
  40 #include "i915_state_inlines.h"
  41 #include "i915_fpc.h"
  42
  43 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  44  * Intel drivers for "other operating systems" implement GL_CLAMP as
  45  * GL_CLAMP_TO_EDGE, so the same is done here.
  46  */
  47 static unsigned
  48 translate_wrap_mode(unsigned wrap)
  49 {
  50    switch (wrap) {
  51    case PIPE_TEX_WRAP_REPEAT:
  52       return TEXCOORDMODE_WRAP;
  53    case PIPE_TEX_WRAP_CLAMP:
  54       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  55    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  56       return TEXCOORDMODE_CLAMP_EDGE;
  57    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  58       return TEXCOORDMODE_CLAMP_BORDER;
  59    /*
  60    case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  61       return TEXCOORDMODE_MIRROR;
  62     */
  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    default:
  76       assert(0);
  77       return FILTER_NEAREST;
  78    }
  79 }
  80
  81 static unsigned translate_mip_filter( unsigned filter )
  82 {
  83    switch (filter) {
  84    case PIPE_TEX_MIPFILTER_NONE:
  85       return MIPFILTER_NONE;
  86    case PIPE_TEX_MIPFILTER_NEAREST:
  87       return MIPFILTER_NEAREST;
  88    case PIPE_TEX_MIPFILTER_LINEAR:
  89       return MIPFILTER_LINEAR;
  90    default:
  91       assert(0);
  92       return MIPFILTER_NONE;
  93    }
  94 }
  95
  96
  97 /* None of this state is actually used for anything yet.
  98  */
  99 static void *
 100 i915_create_blend_state(struct pipe_context *pipe,
 101                         const struct pipe_blend_state *blend)
 102 {
 103    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 104
 105    {
 106       unsigned eqRGB  = blend->rgb_func;
 107       unsigned srcRGB = blend->rgb_src_factor;
 108       unsigned dstRGB = blend->rgb_dst_factor;
 109
 110       unsigned eqA    = blend->alpha_func;
 111       unsigned srcA   = blend->alpha_src_factor;
 112       unsigned dstA   = blend->alpha_dst_factor;
 113
 114       /* Special handling for MIN/MAX filter modes handled at
 115        * state_tracker level.
 116        */
 117
 118       if (srcA != srcRGB ||
 119           dstA != dstRGB ||
 120           eqA != eqRGB) {
 121
 122          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 123                           IAB_MODIFY_ENABLE |
 124                           IAB_ENABLE |
 125                           IAB_MODIFY_FUNC |
 126                           IAB_MODIFY_SRC_FACTOR |
 127                           IAB_MODIFY_DST_FACTOR |
 128                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 129                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 130                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 131       }
 132       else {
 133          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 134                           IAB_MODIFY_ENABLE |
 135                           0);
 136       }
 137    }
 138
 139    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 140                         ENABLE_LOGIC_OP_FUNC |
 141                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 142
 143    if (blend->logicop_enable)
 144       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 145
 146    if (blend->dither)
 147       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 148
 149    if ((blend->colormask & PIPE_MASK_R) == 0)
 150       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 151
 152    if ((blend->colormask & PIPE_MASK_G) == 0)
 153       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 154
 155    if ((blend->colormask & PIPE_MASK_B) == 0)
 156       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 157
 158    if ((blend->colormask & PIPE_MASK_A) == 0)
 159       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 160
 161    if (blend->blend_enable) {
 162       unsigned funcRGB = blend->rgb_func;
 163       unsigned srcRGB  = blend->rgb_src_factor;
 164       unsigned dstRGB  = blend->rgb_dst_factor;
 165
 166       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 167                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 168                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 169                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 170    }
 171
 172    return cso_data;
 173 }
 174
 175 static void i915_bind_blend_state(struct pipe_context *pipe,
 176                                   void *blend)
 177 {
 178    struct i915_context *i915 = i915_context(pipe);
 179    draw_flush(i915->draw);
 180
 181    i915->blend = (struct i915_blend_state*)blend;
 182
 183    i915->dirty |= I915_NEW_BLEND;
 184 }
 185
 186
 187 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 188 {
 189    FREE(blend);
 190 }
 191
 192 static void i915_set_blend_color( struct pipe_context *pipe,
 193                              const struct pipe_blend_color *blend_color )
 194 {
 195    struct i915_context *i915 = i915_context(pipe);
 196    draw_flush(i915->draw);
 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 > 1.0)
 221       minFilt = magFilt = FILTER_ANISOTROPIC;
 222
 223    if (sampler->max_anisotropy > 2.0) {
 224       cso->state[0] |= SS2_MAX_ANISO_4;
 225    }
 226
 227    {
 228       int b = (int) (sampler->lod_bias * 16.0);
 229       b = CLAMP(b, -256, 255);
 230       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 231    }
 232
 233    /* Shadow:
 234     */
 235    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 236    {
 237       cso->state[0] |= (SS2_SHADOW_ENABLE |
 238                         i915_translate_compare_func(sampler->compare_func));
 239
 240       minFilt = FILTER_4X4_FLAT;
 241       magFilt = FILTER_4X4_FLAT;
 242    }
 243
 244    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 245                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 246                      (magFilt << SS2_MAG_FILTER_SHIFT));
 247
 248    cso->state[1] |=
 249       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 250        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 251        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 252
 253    if (sampler->normalized_coords)
 254       cso->state[1] |= SS3_NORMALIZED_COORDS;
 255
 256    {
 257       int minlod = (int) (16.0 * sampler->min_lod);
 258       int maxlod = (int) (16.0 * sampler->max_lod);
 259       minlod = CLAMP(minlod, 0, 16 * 11);
 260       maxlod = CLAMP(maxlod, 0, 16 * 11);
 261
 262       if (minlod > maxlod)
 263          maxlod = minlod;
 264
 265       cso->minlod = minlod;
 266       cso->maxlod = maxlod;
 267    }
 268
 269    {
 270       ubyte r = float_to_ubyte(sampler->border_color[0]);
 271       ubyte g = float_to_ubyte(sampler->border_color[1]);
 272       ubyte b = float_to_ubyte(sampler->border_color[2]);
 273       ubyte a = float_to_ubyte(sampler->border_color[3]);
 274       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 275    }
 276    return cso;
 277 }
 278
 279 static void i915_bind_sampler_states(struct pipe_context *pipe,
 280                                      unsigned num, void **sampler)
 281 {
 282    struct i915_context *i915 = i915_context(pipe);
 283    unsigned i;
 284
 285    assert(num <= PIPE_MAX_SAMPLERS);
 286
 287    /* Check for no-op */
 288    if (num == i915->num_samplers &&
 289        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 290       return;
 291
 292    draw_flush(i915->draw);
 293
 294    for (i = 0; i < num; ++i)
 295       i915->sampler[i] = sampler[i];
 296    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 297       i915->sampler[i] = NULL;
 298
 299    i915->num_samplers = num;
 300
 301    i915->dirty |= I915_NEW_SAMPLER;
 302 }
 303
 304 static void i915_delete_sampler_state(struct pipe_context *pipe,
 305                                       void *sampler)
 306 {
 307    FREE(sampler);
 308 }
 309
 310
 311 /** XXX move someday?  Or consolidate all these simple state setters
 312  * into one file.
 313  */
 314
 315 static void *
 316 i915_create_depth_stencil_state(struct pipe_context *pipe,
 317                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 318 {
 319    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 320
 321    {
 322       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 323       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 324
 325       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 326                               ENABLE_STENCIL_TEST_MASK |
 327                               STENCIL_TEST_MASK(testmask) |
 328                               ENABLE_STENCIL_WRITE_MASK |
 329                               STENCIL_WRITE_MASK(writemask));
 330    }
 331
 332    if (depth_stencil->stencil[0].enabled) {
 333       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 334       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 335       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 336       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 337       int ref  = depth_stencil->stencil[0].ref_value & 0xff;
 338
 339       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 340                             S5_STENCIL_WRITE_ENABLE |
 341                             (ref  << S5_STENCIL_REF_SHIFT) |
 342                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 343                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 344                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 345                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 346    }
 347
 348    if (depth_stencil->stencil[1].enabled) {
 349       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 350       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 351       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 352       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 353       int ref   = depth_stencil->stencil[1].ref_value & 0xff;
 354       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 355       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 356
 357       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 358                      BFO_ENABLE_STENCIL_FUNCS |
 359                      BFO_ENABLE_STENCIL_TWO_SIDE |
 360                      BFO_ENABLE_STENCIL_REF |
 361                      BFO_STENCIL_TWO_SIDE |
 362                      (ref  << BFO_STENCIL_REF_SHIFT) |
 363                      (test << BFO_STENCIL_TEST_SHIFT) |
 364                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 365                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 366                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 367
 368       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 369                      BFM_ENABLE_STENCIL_TEST_MASK |
 370                      BFM_ENABLE_STENCIL_WRITE_MASK |
 371                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 372                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 373    }
 374    else {
 375       /* This actually disables two-side stencil: The bit set is a
 376        * modify-enable bit to indicate we are changing the two-side
 377        * setting.  Then there is a symbolic zero to show that we are
 378        * setting the flag to zero/off.
 379        */
 380       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 381                      BFO_ENABLE_STENCIL_TWO_SIDE |
 382                      0);
 383       cso->bfo[1] = 0;
 384    }
 385
 386    if (depth_stencil->depth.enabled) {
 387       int func = i915_translate_compare_func(depth_stencil->depth.func);
 388
 389       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 390                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 391
 392       if (depth_stencil->depth.writemask)
 393          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 394    }
 395
 396    if (depth_stencil->alpha.enabled) {
 397       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 398       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 399
 400       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 401                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 402                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 403    }
 404
 405    return cso;
 406 }
 407
 408 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 409                                           void *depth_stencil)
 410 {
 411    struct i915_context *i915 = i915_context(pipe);
 412    draw_flush(i915->draw);
 413
 414    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 415
 416    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 417 }
 418
 419 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 420                                             void *depth_stencil)
 421 {
 422    FREE(depth_stencil);
 423 }
 424
 425
 426 static void i915_set_scissor_state( struct pipe_context *pipe,
 427                                  const struct pipe_scissor_state *scissor )
 428 {
 429    struct i915_context *i915 = i915_context(pipe);
 430    draw_flush(i915->draw);
 431
 432    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 433    i915->dirty |= I915_NEW_SCISSOR;
 434 }
 435
 436
 437 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 438                                    const struct pipe_poly_stipple *stipple )
 439 {
 440 }
 441
 442
 443
 444 static void *
 445 i915_create_fs_state(struct pipe_context *pipe,
 446                      const struct pipe_shader_state *templ)
 447 {
 448    struct i915_context *i915 = i915_context(pipe);
 449    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 450    if (!ifs)
 451       return NULL;
 452
 453    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 454
 455    tgsi_scan_shader(templ->tokens, &ifs->info);
 456
 457    /* The shader's compiled to i915 instructions here */
 458    i915_translate_fragment_program(i915, ifs);
 459
 460    return ifs;
 461 }
 462
 463 static void
 464 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 465 {
 466    struct i915_context *i915 = i915_context(pipe);
 467    draw_flush(i915->draw);
 468
 469    i915->fs = (struct i915_fragment_shader*) shader;
 470
 471    i915->dirty |= I915_NEW_FS;
 472 }
 473
 474 static
 475 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 476 {
 477    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 478
 479    if (ifs->program)
 480       FREE(ifs->program);
 481    ifs->program_len = 0;
 482
 483    FREE((struct tgsi_token *)ifs->state.tokens);
 484
 485    FREE(ifs);
 486 }
 487
 488
 489 static void *
 490 i915_create_vs_state(struct pipe_context *pipe,
 491                      const struct pipe_shader_state *templ)
 492 {
 493    struct i915_context *i915 = i915_context(pipe);
 494
 495    /* just pass-through to draw module */
 496    return draw_create_vertex_shader(i915->draw, templ);
 497 }
 498
 499 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 500 {
 501    struct i915_context *i915 = i915_context(pipe);
 502
 503    /* just pass-through to draw module */
 504    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 505
 506    i915->dirty |= I915_NEW_VS;
 507 }
 508
 509 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 510 {
 511    struct i915_context *i915 = i915_context(pipe);
 512
 513    /* just pass-through to draw module */
 514    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 515 }
 516
 517 static void i915_set_constant_buffer(struct pipe_context *pipe,
 518                                      uint shader, uint index,
 519                                      struct pipe_buffer *buf)
 520 {
 521    struct i915_context *i915 = i915_context(pipe);
 522    struct pipe_screen *screen = pipe->screen;
 523    draw_flush(i915->draw);
 524
 525    assert(shader < PIPE_SHADER_TYPES);
 526    assert(index == 0);
 527
 528    /* Make a copy of shader constants.
 529     * During fragment program translation we may add additional
 530     * constants to the array.
 531     *
 532     * We want to consider the situation where some user constants
 533     * (ex: a material color) may change frequently but the shader program
 534     * stays the same.  In that case we should only be updating the first
 535     * N constants, leaving any extras from shader translation alone.
 536     */
 537    if (buf) {
 538       void *mapped;
 539       if (buf->size &&
 540           (mapped = pipe_buffer_map(screen, buf,
 541                                     PIPE_BUFFER_USAGE_CPU_READ))) {
 542          memcpy(i915->current.constants[shader], mapped, buf->size);
 543          pipe_buffer_unmap(screen, buf);
 544          i915->current.num_user_constants[shader]
 545             = buf->size / (4 * sizeof(float));
 546       }
 547       else {
 548          i915->current.num_user_constants[shader] = 0;
 549       }
 550    }
 551
 552    i915->dirty |= I915_NEW_CONSTANTS;
 553 }
 554
 555
 556 static void i915_set_sampler_textures(struct pipe_context *pipe,
 557                                       unsigned num,
 558                                       struct pipe_texture **texture)
 559 {
 560    struct i915_context *i915 = i915_context(pipe);
 561    uint i;
 562
 563    assert(num <= PIPE_MAX_SAMPLERS);
 564
 565    /* Check for no-op */
 566    if (num == i915->num_textures &&
 567        !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
 568       return;
 569
 570    /* Fixes wrong texture in texobj with VBUF */
 571    draw_flush(i915->draw);
 572
 573    for (i = 0; i < num; i++)
 574       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 575                              texture[i]);
 576
 577    for (i = num; i < i915->num_textures; i++)
 578       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 579                              NULL);
 580
 581    i915->num_textures = num;
 582
 583    i915->dirty |= I915_NEW_TEXTURE;
 584 }
 585
 586
 587
 588 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 589                                        const struct pipe_framebuffer_state *fb)
 590 {
 591    struct i915_context *i915 = i915_context(pipe);
 592    int i;
 593
 594    draw_flush(i915->draw);
 595
 596    i915->framebuffer.width = fb->width;
 597    i915->framebuffer.height = fb->height;
 598    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 599    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 600       pipe_surface_reference(&i915->framebuffer.cbufs[i], fb->cbufs[i]);
 601    }
 602    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 603
 604    i915->dirty |= I915_NEW_FRAMEBUFFER;
 605 }
 606
 607
 608
 609 static void i915_set_clip_state( struct pipe_context *pipe,
 610                              const struct pipe_clip_state *clip )
 611 {
 612    struct i915_context *i915 = i915_context(pipe);
 613    draw_flush(i915->draw);
 614
 615    draw_set_clip_state(i915->draw, clip);
 616
 617    i915->dirty |= I915_NEW_CLIP;
 618 }
 619
 620
 621
 622 /* Called when driver state tracker notices changes to the viewport
 623  * matrix:
 624  */
 625 static void i915_set_viewport_state( struct pipe_context *pipe,
 626                                      const struct pipe_viewport_state *viewport )
 627 {
 628    struct i915_context *i915 = i915_context(pipe);
 629
 630    i915->viewport = *viewport; /* struct copy */
 631
 632    /* pass the viewport info to the draw module */
 633    draw_set_viewport_state(i915->draw, &i915->viewport);
 634
 635    i915->dirty |= I915_NEW_VIEWPORT;
 636 }
 637
 638
 639 static void *
 640 i915_create_rasterizer_state(struct pipe_context *pipe,
 641                              const struct pipe_rasterizer_state *rasterizer)
 642 {
 643    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 644
 645    cso->templ = rasterizer;
 646    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 647    cso->light_twoside = rasterizer->light_twoside;
 648    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 649    cso->ds[1].f = rasterizer->offset_scale;
 650    if (rasterizer->poly_stipple_enable) {
 651       cso->st |= ST1_ENABLE;
 652    }
 653
 654    if (rasterizer->scissor)
 655       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 656    else
 657       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 658
 659    switch (rasterizer->cull_mode) {
 660    case PIPE_WINDING_NONE:
 661       cso->LIS4 |= S4_CULLMODE_NONE;
 662       break;
 663    case PIPE_WINDING_CW:
 664       cso->LIS4 |= S4_CULLMODE_CW;
 665       break;
 666    case PIPE_WINDING_CCW:
 667       cso->LIS4 |= S4_CULLMODE_CCW;
 668       break;
 669    case PIPE_WINDING_BOTH:
 670       cso->LIS4 |= S4_CULLMODE_BOTH;
 671       break;
 672    }
 673
 674    {
 675       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 676
 677       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 678
 679       if (rasterizer->line_smooth)
 680          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 681    }
 682
 683    {
 684       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 685
 686       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 687    }
 688
 689    if (rasterizer->flatshade) {
 690       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 691                     S4_FLATSHADE_COLOR |
 692                     S4_FLATSHADE_SPECULAR);
 693    }
 694
 695    cso->LIS7 = fui( rasterizer->offset_units );
 696
 697
 698    return cso;
 699 }
 700
 701 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 702                                         void *raster )
 703 {
 704    struct i915_context *i915 = i915_context(pipe);
 705
 706    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 707
 708    /* pass-through to draw module */
 709    draw_set_rasterizer_state(i915->draw,
 710                           (i915->rasterizer ? i915->rasterizer->templ : NULL));
 711
 712    i915->dirty |= I915_NEW_RASTERIZER;
 713 }
 714
 715 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 716                                          void *raster)
 717 {
 718    FREE(raster);
 719 }
 720
 721 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 722                                     unsigned count,
 723                                     const struct pipe_vertex_buffer *buffers)
 724 {
 725    struct i915_context *i915 = i915_context(pipe);
 726    /* Because we change state before the draw_set_vertex_buffers call
 727     * we need a flush here, just to be sure.
 728     */
 729    draw_flush(i915->draw);
 730
 731    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 732    i915->num_vertex_buffers = count;
 733
 734    /* pass-through to draw module */
 735    draw_set_vertex_buffers(i915->draw, count, buffers);
 736 }
 737
 738 static void i915_set_vertex_elements(struct pipe_context *pipe,
 739                                      unsigned count,
 740                                      const struct pipe_vertex_element *elements)
 741 {
 742    struct i915_context *i915 = i915_context(pipe);
 743    /* Because we change state before the draw_set_vertex_buffers call
 744     * we need a flush here, just to be sure.
 745     */
 746    draw_flush(i915->draw);
 747
 748    i915->num_vertex_elements = count;
 749    /* pass-through to draw module */
 750    draw_set_vertex_elements(i915->draw, count, elements);
 751 }
 752
 753
 754 void
 755 i915_init_state_functions( struct i915_context *i915 )
 756 {
 757    i915->base.create_blend_state = i915_create_blend_state;
 758    i915->base.bind_blend_state = i915_bind_blend_state;
 759    i915->base.delete_blend_state = i915_delete_blend_state;
 760
 761    i915->base.create_sampler_state = i915_create_sampler_state;
 762    i915->base.bind_fragment_sampler_states = i915_bind_sampler_states;
 763    i915->base.delete_sampler_state = i915_delete_sampler_state;
 764
 765    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 766    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 767    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 768
 769    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
 770    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
 771    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
 772    i915->base.create_fs_state = i915_create_fs_state;
 773    i915->base.bind_fs_state = i915_bind_fs_state;
 774    i915->base.delete_fs_state = i915_delete_fs_state;
 775    i915->base.create_vs_state = i915_create_vs_state;
 776    i915->base.bind_vs_state = i915_bind_vs_state;
 777    i915->base.delete_vs_state = i915_delete_vs_state;
 778
 779    i915->base.set_blend_color = i915_set_blend_color;
 780    i915->base.set_clip_state = i915_set_clip_state;
 781    i915->base.set_constant_buffer = i915_set_constant_buffer;
 782    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
 783
 784    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
 785    i915->base.set_scissor_state = i915_set_scissor_state;
 786    i915->base.set_fragment_sampler_textures = i915_set_sampler_textures;
 787    i915->base.set_viewport_state = i915_set_viewport_state;
 788    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
 789    i915->base.set_vertex_elements = i915_set_vertex_elements;
 790 }