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 "util/u_helpers.h"
  34 #include "util/u_inlines.h"
  35 #include "util/u_math.h"
  36 #include "util/u_memory.h"
  37 #include "util/u_transfer.h"
  38 #include "tgsi/tgsi_parse.h"
  39
  40 #include "i915_context.h"
  41 #include "i915_reg.h"
  42 #include "i915_state_inlines.h"
  43 #include "i915_fpc.h"
  44 #include "i915_resource.h"
  45
  46 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  47  * Intel drivers for "other operating systems" implement GL_CLAMP as
  48  * GL_CLAMP_TO_EDGE, so the same is done here.
  49  */
  50 static unsigned
  51 translate_wrap_mode(unsigned wrap)
  52 {
  53    switch (wrap) {
  54    case PIPE_TEX_WRAP_REPEAT:
  55       return TEXCOORDMODE_WRAP;
  56    case PIPE_TEX_WRAP_CLAMP:
  57       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  58    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  59       return TEXCOORDMODE_CLAMP_EDGE;
  60    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  61       return TEXCOORDMODE_CLAMP_BORDER;
  62    case PIPE_TEX_WRAP_MIRROR_REPEAT:
  63       return TEXCOORDMODE_MIRROR;
  64    default:
  65       return TEXCOORDMODE_WRAP;
  66    }
  67 }
  68
  69 static unsigned translate_img_filter( unsigned filter )
  70 {
  71    switch (filter) {
  72    case PIPE_TEX_FILTER_NEAREST:
  73       return FILTER_NEAREST;
  74    case PIPE_TEX_FILTER_LINEAR:
  75       return FILTER_LINEAR;
  76    default:
  77       assert(0);
  78       return FILTER_NEAREST;
  79    }
  80 }
  81
  82 static unsigned translate_mip_filter( unsigned filter )
  83 {
  84    switch (filter) {
  85    case PIPE_TEX_MIPFILTER_NONE:
  86       return MIPFILTER_NONE;
  87    case PIPE_TEX_MIPFILTER_NEAREST:
  88       return MIPFILTER_NEAREST;
  89    case PIPE_TEX_MIPFILTER_LINEAR:
  90       return MIPFILTER_LINEAR;
  91    default:
  92       assert(0);
  93       return MIPFILTER_NONE;
  94    }
  95 }
  96
  97 /* 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->rt[0].rgb_func;
 107       unsigned srcRGB = blend->rt[0].rgb_src_factor;
 108       unsigned dstRGB = blend->rt[0].rgb_dst_factor;
 109
 110       unsigned eqA    = blend->rt[0].alpha_func;
 111       unsigned srcA   = blend->rt[0].alpha_src_factor;
 112       unsigned dstA   = blend->rt[0].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    /* We potentially do some fixup at emission for non-BGRA targets */
 150    if ((blend->rt[0].colormask & PIPE_MASK_R) == 0)
 151       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 152
 153    if ((blend->rt[0].colormask & PIPE_MASK_G) == 0)
 154       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 155
 156    if ((blend->rt[0].colormask & PIPE_MASK_B) == 0)
 157       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 158
 159    if ((blend->rt[0].colormask & PIPE_MASK_A) == 0)
 160       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 161
 162    if (blend->rt[0].blend_enable) {
 163       unsigned funcRGB = blend->rt[0].rgb_func;
 164       unsigned srcRGB  = blend->rt[0].rgb_src_factor;
 165       unsigned dstRGB  = blend->rt[0].rgb_dst_factor;
 166
 167       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 168                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 169                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 170                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 171    }
 172
 173    return cso_data;
 174 }
 175
 176 static void i915_bind_blend_state(struct pipe_context *pipe,
 177                                   void *blend)
 178 {
 179    struct i915_context *i915 = i915_context(pipe);
 180
 181    if (i915->blend == blend)
 182       return;
 183
 184    i915->blend = (struct i915_blend_state*)blend;
 185
 186    i915->dirty |= I915_NEW_BLEND;
 187 }
 188
 189
 190 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 191 {
 192    FREE(blend);
 193 }
 194
 195 static void i915_set_blend_color( struct pipe_context *pipe,
 196                                   const struct pipe_blend_color *blend_color )
 197 {
 198    struct i915_context *i915 = i915_context(pipe);
 199
 200    if (!blend_color)
 201       return;
 202
 203    i915->blend_color = *blend_color;
 204
 205    i915->dirty |= I915_NEW_BLEND;
 206 }
 207
 208 static void i915_set_stencil_ref( struct pipe_context *pipe,
 209                                   const struct pipe_stencil_ref *stencil_ref )
 210 {
 211    struct i915_context *i915 = i915_context(pipe);
 212
 213    i915->stencil_ref = *stencil_ref;
 214
 215    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 216 }
 217
 218 static void *
 219 i915_create_sampler_state(struct pipe_context *pipe,
 220                           const struct pipe_sampler_state *sampler)
 221 {
 222    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 223    const unsigned ws = sampler->wrap_s;
 224    const unsigned wt = sampler->wrap_t;
 225    const unsigned wr = sampler->wrap_r;
 226    unsigned minFilt, magFilt;
 227    unsigned mipFilt;
 228
 229    cso->templ = *sampler;
 230
 231    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 232    minFilt = translate_img_filter( sampler->min_img_filter );
 233    magFilt = translate_img_filter( sampler->mag_img_filter );
 234
 235    if (sampler->max_anisotropy > 1)
 236       minFilt = magFilt = FILTER_ANISOTROPIC;
 237
 238    if (sampler->max_anisotropy > 2) {
 239       cso->state[0] |= SS2_MAX_ANISO_4;
 240    }
 241
 242    {
 243       int b = (int) (sampler->lod_bias * 16.0);
 244       b = CLAMP(b, -256, 255);
 245       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 246    }
 247
 248    /* Shadow:
 249     */
 250    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 251    {
 252       cso->state[0] |= (SS2_SHADOW_ENABLE |
 253                         i915_translate_shadow_compare_func(sampler->compare_func));
 254
 255       minFilt = FILTER_4X4_FLAT;
 256       magFilt = FILTER_4X4_FLAT;
 257    }
 258
 259    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 260                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 261                      (magFilt << SS2_MAG_FILTER_SHIFT));
 262
 263    cso->state[1] |=
 264       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 265        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 266        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 267
 268    if (sampler->normalized_coords)
 269       cso->state[1] |= SS3_NORMALIZED_COORDS;
 270
 271    {
 272       int minlod = (int) (16.0 * sampler->min_lod);
 273       int maxlod = (int) (16.0 * sampler->max_lod);
 274       minlod = CLAMP(minlod, 0, 16 * 11);
 275       maxlod = CLAMP(maxlod, 0, 16 * 11);
 276
 277       if (minlod > maxlod)
 278          maxlod = minlod;
 279
 280       cso->minlod = minlod;
 281       cso->maxlod = maxlod;
 282    }
 283
 284    {
 285       ubyte r = float_to_ubyte(sampler->border_color.f[0]);
 286       ubyte g = float_to_ubyte(sampler->border_color.f[1]);
 287       ubyte b = float_to_ubyte(sampler->border_color.f[2]);
 288       ubyte a = float_to_ubyte(sampler->border_color.f[3]);
 289       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 290    }
 291    return cso;
 292 }
 293
 294 static void
 295 i915_bind_vertex_sampler_states(struct pipe_context *pipe,
 296                                 unsigned num_samplers,
 297                                 void **samplers)
 298 {
 299    struct i915_context *i915 = i915_context(pipe);
 300    unsigned i;
 301
 302    assert(num_samplers <= Elements(i915->vertex_samplers));
 303
 304    /* Check for no-op */
 305    if (num_samplers == i915->num_vertex_samplers &&
 306        !memcmp(i915->vertex_samplers, samplers, num_samplers * sizeof(void *)))
 307       return;
 308
 309    for (i = 0; i < num_samplers; ++i)
 310       i915->vertex_samplers[i] = samplers[i];
 311    for (i = num_samplers; i < Elements(i915->vertex_samplers); ++i)
 312       i915->vertex_samplers[i] = NULL;
 313
 314    i915->num_vertex_samplers = num_samplers;
 315
 316    draw_set_samplers(i915->draw,
 317                      PIPE_SHADER_VERTEX,
 318                      i915->vertex_samplers,
 319                      i915->num_vertex_samplers);
 320 }
 321
 322
 323
 324 static void i915_bind_fragment_sampler_states(struct pipe_context *pipe,
 325                                      unsigned num, void **sampler)
 326 {
 327    struct i915_context *i915 = i915_context(pipe);
 328    unsigned i;
 329
 330    /* Check for no-op */
 331    if (num == i915->num_samplers &&
 332        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 333       return;
 334
 335    for (i = 0; i < num; ++i)
 336       i915->sampler[i] = sampler[i];
 337    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 338       i915->sampler[i] = NULL;
 339
 340    i915->num_samplers = num;
 341
 342    i915->dirty |= I915_NEW_SAMPLER;
 343 }
 344
 345 static void i915_delete_sampler_state(struct pipe_context *pipe,
 346                                       void *sampler)
 347 {
 348    FREE(sampler);
 349 }
 350
 351
 352 /**
 353  * Called before drawing VBO to map vertex samplers and hand them to draw
 354  */
 355 void
 356 i915_prepare_vertex_sampling(struct i915_context *i915)
 357 {
 358    struct i915_winsys *iws = i915->iws;
 359    unsigned i,j;
 360    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
 361    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
 362    uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
 363    unsigned num = i915->num_vertex_sampler_views;
 364    struct pipe_sampler_view **views = i915->vertex_sampler_views;
 365
 366    assert(num <= PIPE_MAX_SAMPLERS);
 367    if (!num)
 368       return;
 369
 370    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 371       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 372
 373       if (view) {
 374          struct pipe_resource *tex = view->texture;
 375          struct i915_texture *i915_tex = i915_texture(tex);
 376          ubyte *addr;
 377
 378          /* We're referencing the texture's internal data, so save a
 379           * reference to it.
 380           */
 381          pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
 382
 383          i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
 384          addr = iws->buffer_map(iws,
 385                                 i915_tex->buffer,
 386                                 FALSE /* read only */);
 387
 388          /* Setup array of mipmap level pointers */
 389          /* FIXME: handle 3D textures? */
 390          for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
 391             mip_offsets[j] = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
 392             row_stride[j] = i915_tex->stride;
 393             img_stride[j] = 0; /* FIXME */;
 394          }
 395
 396          draw_set_mapped_texture(i915->draw,
 397                                  PIPE_SHADER_VERTEX,
 398                                  i,
 399                                  tex->width0, tex->height0, tex->depth0,
 400                                  view->u.tex.first_level, tex->last_level,
 401                                  addr,
 402                                  row_stride, img_stride, mip_offsets);
 403       } else
 404          i915->mapped_vs_tex[i] = NULL;
 405    }
 406 }
 407
 408 void
 409 i915_cleanup_vertex_sampling(struct i915_context *i915)
 410 {
 411    struct i915_winsys *iws = i915->iws;
 412    unsigned i;
 413    for (i = 0; i < Elements(i915->mapped_vs_tex); i++) {
 414       if (i915->mapped_vs_tex_buffer[i]) {
 415          iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
 416          pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
 417       }
 418    }
 419 }
 420
 421
 422
 423 /** XXX move someday?  Or consolidate all these simple state setters
 424  * into one file.
 425  */
 426
 427 static void *
 428 i915_create_depth_stencil_state(struct pipe_context *pipe,
 429                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 430 {
 431    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 432
 433    {
 434       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 435       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 436
 437       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 438                               ENABLE_STENCIL_TEST_MASK |
 439                               STENCIL_TEST_MASK(testmask) |
 440                               ENABLE_STENCIL_WRITE_MASK |
 441                               STENCIL_WRITE_MASK(writemask));
 442    }
 443
 444    if (depth_stencil->stencil[0].enabled) {
 445       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 446       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 447       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 448       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 449
 450       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 451                             S5_STENCIL_WRITE_ENABLE |
 452                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 453                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 454                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 455                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 456    }
 457
 458    if (depth_stencil->stencil[1].enabled) {
 459       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 460       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 461       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 462       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 463       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 464       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 465
 466       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 467                      BFO_ENABLE_STENCIL_FUNCS |
 468                      BFO_ENABLE_STENCIL_TWO_SIDE |
 469                      BFO_ENABLE_STENCIL_REF |
 470                      BFO_STENCIL_TWO_SIDE |
 471                      (test << BFO_STENCIL_TEST_SHIFT) |
 472                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 473                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 474                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 475
 476       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 477                      BFM_ENABLE_STENCIL_TEST_MASK |
 478                      BFM_ENABLE_STENCIL_WRITE_MASK |
 479                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 480                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 481    }
 482    else {
 483       /* This actually disables two-side stencil: The bit set is a
 484        * modify-enable bit to indicate we are changing the two-side
 485        * setting.  Then there is a symbolic zero to show that we are
 486        * setting the flag to zero/off.
 487        */
 488       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 489                      BFO_ENABLE_STENCIL_TWO_SIDE |
 490                      0);
 491       cso->bfo[1] = 0;
 492    }
 493
 494    if (depth_stencil->depth.enabled) {
 495       int func = i915_translate_compare_func(depth_stencil->depth.func);
 496
 497       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 498                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 499
 500       if (depth_stencil->depth.writemask)
 501          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 502    }
 503
 504    if (depth_stencil->alpha.enabled) {
 505       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 506       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 507
 508       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 509                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 510                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 511    }
 512
 513    return cso;
 514 }
 515
 516 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 517                                           void *depth_stencil)
 518 {
 519    struct i915_context *i915 = i915_context(pipe);
 520
 521    if (i915->depth_stencil == depth_stencil)
 522       return;
 523
 524    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 525
 526    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 527 }
 528
 529 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 530                                             void *depth_stencil)
 531 {
 532    FREE(depth_stencil);
 533 }
 534
 535
 536 static void i915_set_scissor_states( struct pipe_context *pipe,
 537                                      unsigned start_slot,
 538                                      unsigned num_scissors,
 539                                  const struct pipe_scissor_state *scissor )
 540 {
 541    struct i915_context *i915 = i915_context(pipe);
 542
 543    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 544    i915->dirty |= I915_NEW_SCISSOR;
 545 }
 546
 547
 548 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 549                                    const struct pipe_poly_stipple *stipple )
 550 {
 551 }
 552
 553
 554
 555 static void *
 556 i915_create_fs_state(struct pipe_context *pipe,
 557                      const struct pipe_shader_state *templ)
 558 {
 559    struct i915_context *i915 = i915_context(pipe);
 560    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 561    if (!ifs)
 562       return NULL;
 563
 564    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
 565    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 566
 567    tgsi_scan_shader(templ->tokens, &ifs->info);
 568
 569    /* The shader's compiled to i915 instructions here */
 570    i915_translate_fragment_program(i915, ifs);
 571
 572    return ifs;
 573 }
 574
 575 static void
 576 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 577 {
 578    struct i915_context *i915 = i915_context(pipe);
 579
 580    if (i915->fs == shader)
 581       return;
 582
 583    i915->fs = (struct i915_fragment_shader*) shader;
 584
 585    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 586
 587    i915->dirty |= I915_NEW_FS;
 588 }
 589
 590 static
 591 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 592 {
 593    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 594
 595    FREE(ifs->decl);
 596    ifs->decl = NULL;
 597
 598    if (ifs->program) {
 599       FREE(ifs->program);
 600       ifs->program = NULL;
 601       FREE((struct tgsi_token *)ifs->state.tokens);
 602       ifs->state.tokens = NULL;
 603    }
 604
 605    ifs->program_len = 0;
 606    ifs->decl_len = 0;
 607
 608    FREE(ifs);
 609 }
 610
 611
 612 static void *
 613 i915_create_vs_state(struct pipe_context *pipe,
 614                      const struct pipe_shader_state *templ)
 615 {
 616    struct i915_context *i915 = i915_context(pipe);
 617
 618    /* just pass-through to draw module */
 619    return draw_create_vertex_shader(i915->draw, templ);
 620 }
 621
 622 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 623 {
 624    struct i915_context *i915 = i915_context(pipe);
 625
 626    if (i915->vs == shader)
 627       return;
 628
 629    i915->vs = shader;
 630
 631    /* just pass-through to draw module */
 632    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 633
 634    i915->dirty |= I915_NEW_VS;
 635 }
 636
 637 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 638 {
 639    struct i915_context *i915 = i915_context(pipe);
 640
 641    /* just pass-through to draw module */
 642    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 643 }
 644
 645 static void i915_set_constant_buffer(struct pipe_context *pipe,
 646                                      uint shader, uint index,
 647                                      struct pipe_constant_buffer *cb)
 648 {
 649    struct i915_context *i915 = i915_context(pipe);
 650    struct pipe_resource *buf = cb ? cb->buffer : NULL;
 651    unsigned new_num = 0;
 652    boolean diff = TRUE;
 653
 654    /* XXX don't support geom shaders now */
 655    if (shader == PIPE_SHADER_GEOMETRY)
 656       return;
 657
 658    if (cb && cb->user_buffer) {
 659       buf = i915_user_buffer_create(pipe->screen, (void *) cb->user_buffer,
 660                                     cb->buffer_size,
 661                                     PIPE_BIND_CONSTANT_BUFFER);
 662    }
 663
 664    /* if we have a new buffer compare it with the old one */
 665    if (buf) {
 666       struct i915_buffer *ibuf = i915_buffer(buf);
 667       struct pipe_resource *old_buf = i915->constants[shader];
 668       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 669       unsigned old_num = i915->current.num_user_constants[shader];
 670
 671       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 672
 673       if (old_num == new_num) {
 674          if (old_num == 0)
 675             diff = FALSE;
 676 #if 0
 677          /* XXX no point in running this code since st/mesa only uses user buffers */
 678          /* Can't compare the buffer data since they are userbuffers */
 679          else if (old && old->free_on_destroy)
 680             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 681 #else
 682          (void)old;
 683 #endif
 684       }
 685    } else {
 686       diff = i915->current.num_user_constants[shader] != 0;
 687    }
 688
 689    pipe_resource_reference(&i915->constants[shader], buf);
 690    i915->current.num_user_constants[shader] = new_num;
 691
 692    if (diff)
 693       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 694
 695    if (cb && cb->user_buffer) {
 696       pipe_resource_reference(&buf, NULL);
 697    }
 698 }
 699
 700
 701 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 702                                             unsigned num,
 703                                             struct pipe_sampler_view **views)
 704 {
 705    struct i915_context *i915 = i915_context(pipe);
 706    uint i;
 707
 708    assert(num <= PIPE_MAX_SAMPLERS);
 709
 710    /* Check for no-op */
 711    if (num == i915->num_fragment_sampler_views &&
 712        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 713       return;
 714
 715    for (i = 0; i < num; i++) {
 716       /* Note: we're using pipe_sampler_view_release() here to work around
 717        * a possible crash when the old view belongs to another context that
 718        * was already destroyed.
 719        */
 720       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
 721       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 722                                   views[i]);
 723    }
 724
 725    for (i = num; i < i915->num_fragment_sampler_views; i++)
 726       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
 727
 728    i915->num_fragment_sampler_views = num;
 729
 730    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 731 }
 732
 733 static void
 734 i915_set_vertex_sampler_views(struct pipe_context *pipe,
 735                               unsigned num,
 736                               struct pipe_sampler_view **views)
 737 {
 738    struct i915_context *i915 = i915_context(pipe);
 739    uint i;
 740
 741    assert(num <= Elements(i915->vertex_sampler_views));
 742
 743    /* Check for no-op */
 744    if (num == i915->num_vertex_sampler_views &&
 745        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 746       return;
 747    }
 748
 749    for (i = 0; i < Elements(i915->vertex_sampler_views); i++) {
 750       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 751
 752       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
 753    }
 754
 755    i915->num_vertex_sampler_views = num;
 756
 757    draw_set_sampler_views(i915->draw,
 758                           PIPE_SHADER_VERTEX,
 759                           i915->vertex_sampler_views,
 760                           i915->num_vertex_sampler_views);
 761 }
 762
 763
 764 static struct pipe_sampler_view *
 765 i915_create_sampler_view(struct pipe_context *pipe,
 766                          struct pipe_resource *texture,
 767                          const struct pipe_sampler_view *templ)
 768 {
 769    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 770
 771    if (view) {
 772       *view = *templ;
 773       view->reference.count = 1;
 774       view->texture = NULL;
 775       pipe_resource_reference(&view->texture, texture);
 776       view->context = pipe;
 777    }
 778
 779    return view;
 780 }
 781
 782
 783 static void
 784 i915_sampler_view_destroy(struct pipe_context *pipe,
 785                           struct pipe_sampler_view *view)
 786 {
 787    pipe_resource_reference(&view->texture, NULL);
 788    FREE(view);
 789 }
 790
 791
 792 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 793                                        const struct pipe_framebuffer_state *fb)
 794 {
 795    struct i915_context *i915 = i915_context(pipe);
 796    int i;
 797
 798    i915->framebuffer.width = fb->width;
 799    i915->framebuffer.height = fb->height;
 800    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 801    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 802       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 803                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 804    }
 805    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 806
 807    i915->dirty |= I915_NEW_FRAMEBUFFER;
 808 }
 809
 810
 811
 812 static void i915_set_clip_state( struct pipe_context *pipe,
 813                              const struct pipe_clip_state *clip )
 814 {
 815    struct i915_context *i915 = i915_context(pipe);
 816
 817    i915->clip = *clip;
 818
 819    draw_set_clip_state(i915->draw, clip);
 820
 821    i915->dirty |= I915_NEW_CLIP;
 822 }
 823
 824
 825
 826 /* Called when driver state tracker notices changes to the viewport
 827  * matrix:
 828  */
 829 static void i915_set_viewport_states( struct pipe_context *pipe,
 830                                       unsigned start_slot,
 831                                       unsigned num_viewports,
 832                                      const struct pipe_viewport_state *viewport )
 833 {
 834    struct i915_context *i915 = i915_context(pipe);
 835
 836    i915->viewport = *viewport; /* struct copy */
 837
 838    /* pass the viewport info to the draw module */
 839    draw_set_viewport_states(i915->draw, start_slot, num_viewports,
 840                             &i915->viewport);
 841
 842    i915->dirty |= I915_NEW_VIEWPORT;
 843 }
 844
 845
 846 static void *
 847 i915_create_rasterizer_state(struct pipe_context *pipe,
 848                              const struct pipe_rasterizer_state *rasterizer)
 849 {
 850    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 851
 852    cso->templ = *rasterizer;
 853    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 854    cso->light_twoside = rasterizer->light_twoside;
 855    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 856    cso->ds[1].f = rasterizer->offset_scale;
 857    if (rasterizer->poly_stipple_enable) {
 858       cso->st |= ST1_ENABLE;
 859    }
 860
 861    if (rasterizer->scissor)
 862       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 863    else
 864       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 865
 866    switch (rasterizer->cull_face) {
 867    case PIPE_FACE_NONE:
 868       cso->LIS4 |= S4_CULLMODE_NONE;
 869       break;
 870    case PIPE_FACE_FRONT:
 871       if (rasterizer->front_ccw)
 872          cso->LIS4 |= S4_CULLMODE_CCW;
 873       else
 874          cso->LIS4 |= S4_CULLMODE_CW;
 875       break;
 876    case PIPE_FACE_BACK:
 877       if (rasterizer->front_ccw)
 878          cso->LIS4 |= S4_CULLMODE_CW;
 879       else
 880          cso->LIS4 |= S4_CULLMODE_CCW;
 881       break;
 882    case PIPE_FACE_FRONT_AND_BACK:
 883       cso->LIS4 |= S4_CULLMODE_BOTH;
 884       break;
 885    }
 886
 887    {
 888       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 889
 890       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 891
 892       if (rasterizer->line_smooth)
 893          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 894    }
 895
 896    {
 897       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 898
 899       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 900    }
 901
 902    if (rasterizer->flatshade) {
 903       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 904                     S4_FLATSHADE_COLOR |
 905                     S4_FLATSHADE_SPECULAR);
 906    }
 907
 908    cso->LIS7 = fui( rasterizer->offset_units );
 909
 910
 911    return cso;
 912 }
 913
 914 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 915                                         void *raster )
 916 {
 917    struct i915_context *i915 = i915_context(pipe);
 918
 919    if (i915->rasterizer == raster)
 920       return;
 921
 922    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 923
 924    /* pass-through to draw module */
 925    draw_set_rasterizer_state(i915->draw,
 926                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 927                            raster);
 928
 929    i915->dirty |= I915_NEW_RASTERIZER;
 930 }
 931
 932 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 933                                          void *raster)
 934 {
 935    FREE(raster);
 936 }
 937
 938 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 939                                     unsigned start_slot, unsigned count,
 940                                     const struct pipe_vertex_buffer *buffers)
 941 {
 942    struct i915_context *i915 = i915_context(pipe);
 943    struct draw_context *draw = i915->draw;
 944
 945    util_set_vertex_buffers_count(i915->vertex_buffers,
 946                                  &i915->nr_vertex_buffers,
 947                                  buffers, start_slot, count);
 948
 949    /* pass-through to draw module */
 950    draw_set_vertex_buffers(draw, start_slot, count, buffers);
 951 }
 952
 953 static void *
 954 i915_create_vertex_elements_state(struct pipe_context *pipe,
 955                                   unsigned count,
 956                                   const struct pipe_vertex_element *attribs)
 957 {
 958    struct i915_velems_state *velems;
 959    assert(count <= PIPE_MAX_ATTRIBS);
 960    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 961    if (velems) {
 962       velems->count = count;
 963       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
 964    }
 965    return velems;
 966 }
 967
 968 static void
 969 i915_bind_vertex_elements_state(struct pipe_context *pipe,
 970                                 void *velems)
 971 {
 972    struct i915_context *i915 = i915_context(pipe);
 973    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
 974
 975    if (i915->velems == velems)
 976       return;
 977
 978    i915->velems = velems;
 979
 980    /* pass-through to draw module */
 981    if (i915_velems) {
 982       draw_set_vertex_elements(i915->draw,
 983             i915_velems->count, i915_velems->velem);
 984    }
 985 }
 986
 987 static void
 988 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
 989 {
 990    FREE( velems );
 991 }
 992
 993 static void i915_set_index_buffer(struct pipe_context *pipe,
 994                                   const struct pipe_index_buffer *ib)
 995 {
 996    struct i915_context *i915 = i915_context(pipe);
 997
 998    if (ib)
 999       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1000    else
1001       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1002 }
1003
1004 static void
1005 i915_set_sample_mask(struct pipe_context *pipe,
1006                      unsigned sample_mask)
1007 {
1008 }
1009
1010 void
1011 i915_init_state_functions( struct i915_context *i915 )
1012 {
1013    i915->base.create_blend_state = i915_create_blend_state;
1014    i915->base.bind_blend_state = i915_bind_blend_state;
1015    i915->base.delete_blend_state = i915_delete_blend_state;
1016
1017    i915->base.create_sampler_state = i915_create_sampler_state;
1018    i915->base.bind_fragment_sampler_states = i915_bind_fragment_sampler_states;
1019    i915->base.bind_vertex_sampler_states = i915_bind_vertex_sampler_states;
1020    i915->base.delete_sampler_state = i915_delete_sampler_state;
1021
1022    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1023    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1024    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1025
1026    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1027    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1028    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1029    i915->base.create_fs_state = i915_create_fs_state;
1030    i915->base.bind_fs_state = i915_bind_fs_state;
1031    i915->base.delete_fs_state = i915_delete_fs_state;
1032    i915->base.create_vs_state = i915_create_vs_state;
1033    i915->base.bind_vs_state = i915_bind_vs_state;
1034    i915->base.delete_vs_state = i915_delete_vs_state;
1035    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1036    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1037    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1038
1039    i915->base.set_blend_color = i915_set_blend_color;
1040    i915->base.set_stencil_ref = i915_set_stencil_ref;
1041    i915->base.set_clip_state = i915_set_clip_state;
1042    i915->base.set_sample_mask = i915_set_sample_mask;
1043    i915->base.set_constant_buffer = i915_set_constant_buffer;
1044    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1045
1046    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1047    i915->base.set_scissor_states = i915_set_scissor_states;
1048    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
1049    i915->base.set_vertex_sampler_views = i915_set_vertex_sampler_views;
1050    i915->base.create_sampler_view = i915_create_sampler_view;
1051    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1052    i915->base.set_viewport_states = i915_set_viewport_states;
1053    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1054    i915->base.set_index_buffer = i915_set_index_buffer;
1055 }