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
  98 /* None of this state is actually used for anything yet.
  99  */
 100 static void *
 101 i915_create_blend_state(struct pipe_context *pipe,
 102                         const struct pipe_blend_state *blend)
 103 {
 104    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 105
 106    {
 107       unsigned eqRGB  = blend->rt[0].rgb_func;
 108       unsigned srcRGB = blend->rt[0].rgb_src_factor;
 109       unsigned dstRGB = blend->rt[0].rgb_dst_factor;
 110
 111       unsigned eqA    = blend->rt[0].alpha_func;
 112       unsigned srcA   = blend->rt[0].alpha_src_factor;
 113       unsigned dstA   = blend->rt[0].alpha_dst_factor;
 114
 115       /* Special handling for MIN/MAX filter modes handled at
 116        * state_tracker level.
 117        */
 118
 119       if (srcA != srcRGB ||
 120           dstA != dstRGB ||
 121           eqA != eqRGB) {
 122
 123          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 124                           IAB_MODIFY_ENABLE |
 125                           IAB_ENABLE |
 126                           IAB_MODIFY_FUNC |
 127                           IAB_MODIFY_SRC_FACTOR |
 128                           IAB_MODIFY_DST_FACTOR |
 129                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 130                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 131                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 132       }
 133       else {
 134          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 135                           IAB_MODIFY_ENABLE |
 136                           0);
 137       }
 138    }
 139
 140    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 141                         ENABLE_LOGIC_OP_FUNC |
 142                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 143
 144    if (blend->logicop_enable)
 145       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 146
 147    if (blend->dither)
 148       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 149
 150    /* XXX here take the target fixup into account */
 151    if ((blend->rt[0].colormask & PIPE_MASK_R) == 0)
 152       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 153
 154    if ((blend->rt[0].colormask & PIPE_MASK_G) == 0)
 155       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 156
 157    if ((blend->rt[0].colormask & PIPE_MASK_B) == 0)
 158       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 159
 160    if ((blend->rt[0].colormask & PIPE_MASK_A) == 0)
 161       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 162
 163    if (blend->rt[0].blend_enable) {
 164       unsigned funcRGB = blend->rt[0].rgb_func;
 165       unsigned srcRGB  = blend->rt[0].rgb_src_factor;
 166       unsigned dstRGB  = blend->rt[0].rgb_dst_factor;
 167
 168       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 169                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 170                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 171                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 172    }
 173
 174    return cso_data;
 175 }
 176
 177 static void i915_bind_blend_state(struct pipe_context *pipe,
 178                                   void *blend)
 179 {
 180    struct i915_context *i915 = i915_context(pipe);
 181
 182    if (i915->blend == blend)
 183       return;
 184
 185    i915->blend = (struct i915_blend_state*)blend;
 186
 187    i915->dirty |= I915_NEW_BLEND;
 188 }
 189
 190
 191 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 192 {
 193    FREE(blend);
 194 }
 195
 196 static void i915_set_blend_color( struct pipe_context *pipe,
 197                                   const struct pipe_blend_color *blend_color )
 198 {
 199    struct i915_context *i915 = i915_context(pipe);
 200
 201    if (!blend_color)
 202       return;
 203
 204    i915->blend_color = *blend_color;
 205
 206    i915->dirty |= I915_NEW_BLEND;
 207 }
 208
 209 static void i915_set_stencil_ref( struct pipe_context *pipe,
 210                                   const struct pipe_stencil_ref *stencil_ref )
 211 {
 212    struct i915_context *i915 = i915_context(pipe);
 213
 214    i915->stencil_ref = *stencil_ref;
 215
 216    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 217 }
 218
 219 static void *
 220 i915_create_sampler_state(struct pipe_context *pipe,
 221                           const struct pipe_sampler_state *sampler)
 222 {
 223    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 224    const unsigned ws = sampler->wrap_s;
 225    const unsigned wt = sampler->wrap_t;
 226    const unsigned wr = sampler->wrap_r;
 227    unsigned minFilt, magFilt;
 228    unsigned mipFilt;
 229
 230    cso->templ = *sampler;
 231
 232    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 233    minFilt = translate_img_filter( sampler->min_img_filter );
 234    magFilt = translate_img_filter( sampler->mag_img_filter );
 235
 236    if (sampler->max_anisotropy > 1)
 237       minFilt = magFilt = FILTER_ANISOTROPIC;
 238
 239    if (sampler->max_anisotropy > 2) {
 240       cso->state[0] |= SS2_MAX_ANISO_4;
 241    }
 242
 243    {
 244       int b = (int) (sampler->lod_bias * 16.0);
 245       b = CLAMP(b, -256, 255);
 246       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 247    }
 248
 249    /* Shadow:
 250     */
 251    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 252    {
 253       cso->state[0] |= (SS2_SHADOW_ENABLE |
 254                         i915_translate_shadow_compare_func(sampler->compare_func));
 255
 256       minFilt = FILTER_4X4_FLAT;
 257       magFilt = FILTER_4X4_FLAT;
 258    }
 259
 260    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 261                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 262                      (magFilt << SS2_MAG_FILTER_SHIFT));
 263
 264    cso->state[1] |=
 265       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 266        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 267        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 268
 269    if (sampler->normalized_coords)
 270       cso->state[1] |= SS3_NORMALIZED_COORDS;
 271
 272    {
 273       int minlod = (int) (16.0 * sampler->min_lod);
 274       int maxlod = (int) (16.0 * sampler->max_lod);
 275       minlod = CLAMP(minlod, 0, 16 * 11);
 276       maxlod = CLAMP(maxlod, 0, 16 * 11);
 277
 278       if (minlod > maxlod)
 279          maxlod = minlod;
 280
 281       cso->minlod = minlod;
 282       cso->maxlod = maxlod;
 283    }
 284
 285    {
 286       ubyte r = float_to_ubyte(sampler->border_color.f[0]);
 287       ubyte g = float_to_ubyte(sampler->border_color.f[1]);
 288       ubyte b = float_to_ubyte(sampler->border_color.f[2]);
 289       ubyte a = float_to_ubyte(sampler->border_color.f[3]);
 290       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 291    }
 292    return cso;
 293 }
 294
 295 static void
 296 i915_bind_vertex_sampler_states(struct pipe_context *pipe,
 297                                 unsigned num_samplers,
 298                                 void **samplers)
 299 {
 300    struct i915_context *i915 = i915_context(pipe);
 301    unsigned i;
 302
 303    assert(num_samplers <= Elements(i915->vertex_samplers));
 304
 305    /* Check for no-op */
 306    if (num_samplers == i915->num_vertex_samplers &&
 307        !memcmp(i915->vertex_samplers, samplers, num_samplers * sizeof(void *)))
 308       return;
 309
 310    for (i = 0; i < num_samplers; ++i)
 311       i915->vertex_samplers[i] = samplers[i];
 312    for (i = num_samplers; i < Elements(i915->vertex_samplers); ++i)
 313       i915->vertex_samplers[i] = NULL;
 314
 315    i915->num_vertex_samplers = num_samplers;
 316
 317    draw_set_samplers(i915->draw,
 318                      PIPE_SHADER_VERTEX,
 319                      i915->vertex_samplers,
 320                      i915->num_vertex_samplers);
 321 }
 322
 323
 324
 325 static void i915_bind_fragment_sampler_states(struct pipe_context *pipe,
 326                                      unsigned num, void **sampler)
 327 {
 328    struct i915_context *i915 = i915_context(pipe);
 329    unsigned i;
 330
 331    /* Check for no-op */
 332    if (num == i915->num_samplers &&
 333        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 334       return;
 335
 336    for (i = 0; i < num; ++i)
 337       i915->sampler[i] = sampler[i];
 338    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 339       i915->sampler[i] = NULL;
 340
 341    i915->num_samplers = num;
 342
 343    i915->dirty |= I915_NEW_SAMPLER;
 344 }
 345
 346 static void i915_delete_sampler_state(struct pipe_context *pipe,
 347                                       void *sampler)
 348 {
 349    FREE(sampler);
 350 }
 351
 352
 353 /**
 354  * Called before drawing VBO to map vertex samplers and hand them to draw
 355  */
 356 void
 357 i915_prepare_vertex_sampling(struct i915_context *i915)
 358 {
 359    struct i915_winsys *iws = i915->iws;
 360    unsigned i,j;
 361    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
 362    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
 363    uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
 364    unsigned num = i915->num_vertex_sampler_views;
 365    struct pipe_sampler_view **views = i915->vertex_sampler_views;
 366
 367    assert(num <= PIPE_MAX_SAMPLERS);
 368    if (!num)
 369       return;
 370
 371    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 372       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 373
 374       if (view) {
 375          struct pipe_resource *tex = view->texture;
 376          struct i915_texture *i915_tex = i915_texture(tex);
 377          ubyte *addr;
 378
 379          /* We're referencing the texture's internal data, so save a
 380           * reference to it.
 381           */
 382          pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
 383
 384          i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
 385          addr = iws->buffer_map(iws,
 386                                 i915_tex->buffer,
 387                                 FALSE /* read only */);
 388
 389          /* Setup array of mipmap level pointers */
 390          /* FIXME: handle 3D textures? */
 391          for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
 392             mip_offsets[j] = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
 393             row_stride[j] = i915_tex->stride;
 394             img_stride[j] = 0; /* FIXME */;
 395          }
 396
 397          draw_set_mapped_texture(i915->draw,
 398                                  PIPE_SHADER_VERTEX,
 399                                  i,
 400                                  tex->width0, tex->height0, tex->depth0,
 401                                  view->u.tex.first_level, tex->last_level,
 402                                  addr,
 403                                  row_stride, img_stride, mip_offsets);
 404       } else
 405          i915->mapped_vs_tex[i] = NULL;
 406    }
 407 }
 408
 409 void
 410 i915_cleanup_vertex_sampling(struct i915_context *i915)
 411 {
 412    struct i915_winsys *iws = i915->iws;
 413    unsigned i;
 414    for (i = 0; i < Elements(i915->mapped_vs_tex); i++) {
 415       if (i915->mapped_vs_tex_buffer[i]) {
 416          iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
 417          pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
 418       }
 419    }
 420 }
 421
 422
 423
 424 /** XXX move someday?  Or consolidate all these simple state setters
 425  * into one file.
 426  */
 427
 428 static void *
 429 i915_create_depth_stencil_state(struct pipe_context *pipe,
 430                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 431 {
 432    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 433
 434    {
 435       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 436       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 437
 438       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 439                               ENABLE_STENCIL_TEST_MASK |
 440                               STENCIL_TEST_MASK(testmask) |
 441                               ENABLE_STENCIL_WRITE_MASK |
 442                               STENCIL_WRITE_MASK(writemask));
 443    }
 444
 445    if (depth_stencil->stencil[0].enabled) {
 446       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 447       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 448       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 449       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 450
 451       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 452                             S5_STENCIL_WRITE_ENABLE |
 453                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 454                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 455                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 456                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 457    }
 458
 459    if (depth_stencil->stencil[1].enabled) {
 460       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 461       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 462       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 463       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 464       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 465       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 466
 467       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 468                      BFO_ENABLE_STENCIL_FUNCS |
 469                      BFO_ENABLE_STENCIL_TWO_SIDE |
 470                      BFO_ENABLE_STENCIL_REF |
 471                      BFO_STENCIL_TWO_SIDE |
 472                      (test << BFO_STENCIL_TEST_SHIFT) |
 473                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 474                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 475                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 476
 477       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 478                      BFM_ENABLE_STENCIL_TEST_MASK |
 479                      BFM_ENABLE_STENCIL_WRITE_MASK |
 480                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 481                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 482    }
 483    else {
 484       /* This actually disables two-side stencil: The bit set is a
 485        * modify-enable bit to indicate we are changing the two-side
 486        * setting.  Then there is a symbolic zero to show that we are
 487        * setting the flag to zero/off.
 488        */
 489       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 490                      BFO_ENABLE_STENCIL_TWO_SIDE |
 491                      0);
 492       cso->bfo[1] = 0;
 493    }
 494
 495    if (depth_stencil->depth.enabled) {
 496       int func = i915_translate_compare_func(depth_stencil->depth.func);
 497
 498       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 499                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 500
 501       if (depth_stencil->depth.writemask)
 502          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 503    }
 504
 505    if (depth_stencil->alpha.enabled) {
 506       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 507       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 508
 509       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 510                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 511                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 512    }
 513
 514    return cso;
 515 }
 516
 517 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 518                                           void *depth_stencil)
 519 {
 520    struct i915_context *i915 = i915_context(pipe);
 521
 522    if (i915->depth_stencil == depth_stencil)
 523       return;
 524
 525    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 526
 527    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 528 }
 529
 530 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 531                                             void *depth_stencil)
 532 {
 533    FREE(depth_stencil);
 534 }
 535
 536
 537 static void i915_set_scissor_states( struct pipe_context *pipe,
 538                                      unsigned start_slot,
 539                                      unsigned num_scissors,
 540                                  const struct pipe_scissor_state *scissor )
 541 {
 542    struct i915_context *i915 = i915_context(pipe);
 543
 544    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 545    i915->dirty |= I915_NEW_SCISSOR;
 546 }
 547
 548
 549 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 550                                    const struct pipe_poly_stipple *stipple )
 551 {
 552 }
 553
 554
 555
 556 static void *
 557 i915_create_fs_state(struct pipe_context *pipe,
 558                      const struct pipe_shader_state *templ)
 559 {
 560    struct i915_context *i915 = i915_context(pipe);
 561    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 562    if (!ifs)
 563       return NULL;
 564
 565    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
 566    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 567
 568    tgsi_scan_shader(templ->tokens, &ifs->info);
 569
 570    /* The shader's compiled to i915 instructions here */
 571    i915_translate_fragment_program(i915, ifs);
 572
 573    return ifs;
 574 }
 575
 576 static void
 577 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 578 {
 579    struct i915_context *i915 = i915_context(pipe);
 580
 581    if (i915->fs == shader)
 582       return;
 583
 584    i915->fs = (struct i915_fragment_shader*) shader;
 585
 586    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 587
 588    i915->dirty |= I915_NEW_FS;
 589 }
 590
 591 static
 592 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 593 {
 594    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 595
 596    FREE(ifs->decl);
 597    ifs->decl = NULL;
 598
 599    if (ifs->program) {
 600       FREE(ifs->program);
 601       ifs->program = NULL;
 602       FREE((struct tgsi_token *)ifs->state.tokens);
 603       ifs->state.tokens = NULL;
 604    }
 605
 606    ifs->program_len = 0;
 607    ifs->decl_len = 0;
 608
 609    FREE(ifs);
 610 }
 611
 612
 613 static void *
 614 i915_create_vs_state(struct pipe_context *pipe,
 615                      const struct pipe_shader_state *templ)
 616 {
 617    struct i915_context *i915 = i915_context(pipe);
 618
 619    /* just pass-through to draw module */
 620    return draw_create_vertex_shader(i915->draw, templ);
 621 }
 622
 623 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 624 {
 625    struct i915_context *i915 = i915_context(pipe);
 626
 627    if (i915->vs == shader)
 628       return;
 629
 630    i915->vs = shader;
 631
 632    /* just pass-through to draw module */
 633    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 634
 635    i915->dirty |= I915_NEW_VS;
 636 }
 637
 638 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 639 {
 640    struct i915_context *i915 = i915_context(pipe);
 641
 642    /* just pass-through to draw module */
 643    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 644 }
 645
 646 static void i915_set_constant_buffer(struct pipe_context *pipe,
 647                                      uint shader, uint index,
 648                                      struct pipe_constant_buffer *cb)
 649 {
 650    struct i915_context *i915 = i915_context(pipe);
 651    struct pipe_resource *buf = cb ? cb->buffer : NULL;
 652    unsigned new_num = 0;
 653    boolean diff = TRUE;
 654
 655    /* XXX don't support geom shaders now */
 656    if (shader == PIPE_SHADER_GEOMETRY)
 657       return;
 658
 659    if (cb && cb->user_buffer) {
 660       buf = i915_user_buffer_create(pipe->screen, (void *) cb->user_buffer,
 661                                     cb->buffer_size,
 662                                     PIPE_BIND_CONSTANT_BUFFER);
 663    }
 664
 665    /* if we have a new buffer compare it with the old one */
 666    if (buf) {
 667       struct i915_buffer *ibuf = i915_buffer(buf);
 668       struct pipe_resource *old_buf = i915->constants[shader];
 669       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 670       unsigned old_num = i915->current.num_user_constants[shader];
 671
 672       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 673
 674       if (old_num == new_num) {
 675          if (old_num == 0)
 676             diff = FALSE;
 677 #if 0
 678          /* XXX no point in running this code since st/mesa only uses user buffers */
 679          /* Can't compare the buffer data since they are userbuffers */
 680          else if (old && old->free_on_destroy)
 681             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 682 #else
 683          (void)old;
 684 #endif
 685       }
 686    } else {
 687       diff = i915->current.num_user_constants[shader] != 0;
 688    }
 689
 690    pipe_resource_reference(&i915->constants[shader], buf);
 691    i915->current.num_user_constants[shader] = new_num;
 692
 693    if (diff)
 694       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 695
 696    if (cb && cb->user_buffer) {
 697       pipe_resource_reference(&buf, NULL);
 698    }
 699 }
 700
 701
 702 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 703                                             unsigned num,
 704                                             struct pipe_sampler_view **views)
 705 {
 706    struct i915_context *i915 = i915_context(pipe);
 707    uint i;
 708
 709    assert(num <= PIPE_MAX_SAMPLERS);
 710
 711    /* Check for no-op */
 712    if (num == i915->num_fragment_sampler_views &&
 713        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 714       return;
 715
 716    for (i = 0; i < num; i++) {
 717       /* Note: we're using pipe_sampler_view_release() here to work around
 718        * a possible crash when the old view belongs to another context that
 719        * was already destroyed.
 720        */
 721       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
 722       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 723                                   views[i]);
 724    }
 725
 726    for (i = num; i < i915->num_fragment_sampler_views; i++)
 727       pipe_sampler_view_release(pipe, &i915->fragment_sampler_views[i]);
 728
 729    i915->num_fragment_sampler_views = num;
 730
 731    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 732 }
 733
 734 static void
 735 i915_set_vertex_sampler_views(struct pipe_context *pipe,
 736                               unsigned num,
 737                               struct pipe_sampler_view **views)
 738 {
 739    struct i915_context *i915 = i915_context(pipe);
 740    uint i;
 741
 742    assert(num <= Elements(i915->vertex_sampler_views));
 743
 744    /* Check for no-op */
 745    if (num == i915->num_vertex_sampler_views &&
 746        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 747       return;
 748    }
 749
 750    for (i = 0; i < Elements(i915->vertex_sampler_views); i++) {
 751       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 752
 753       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
 754    }
 755
 756    i915->num_vertex_sampler_views = num;
 757
 758    draw_set_sampler_views(i915->draw,
 759                           PIPE_SHADER_VERTEX,
 760                           i915->vertex_sampler_views,
 761                           i915->num_vertex_sampler_views);
 762 }
 763
 764
 765 static struct pipe_sampler_view *
 766 i915_create_sampler_view(struct pipe_context *pipe,
 767                          struct pipe_resource *texture,
 768                          const struct pipe_sampler_view *templ)
 769 {
 770    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 771
 772    if (view) {
 773       *view = *templ;
 774       view->reference.count = 1;
 775       view->texture = NULL;
 776       pipe_resource_reference(&view->texture, texture);
 777       view->context = pipe;
 778    }
 779
 780    return view;
 781 }
 782
 783
 784 static void
 785 i915_sampler_view_destroy(struct pipe_context *pipe,
 786                           struct pipe_sampler_view *view)
 787 {
 788    pipe_resource_reference(&view->texture, NULL);
 789    FREE(view);
 790 }
 791
 792
 793 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 794                                        const struct pipe_framebuffer_state *fb)
 795 {
 796    struct i915_context *i915 = i915_context(pipe);
 797    int i;
 798
 799    i915->framebuffer.width = fb->width;
 800    i915->framebuffer.height = fb->height;
 801    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 802    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 803       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 804                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 805    }
 806    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 807
 808    i915->dirty |= I915_NEW_FRAMEBUFFER;
 809 }
 810
 811
 812
 813 static void i915_set_clip_state( struct pipe_context *pipe,
 814                              const struct pipe_clip_state *clip )
 815 {
 816    struct i915_context *i915 = i915_context(pipe);
 817
 818    i915->clip = *clip;
 819
 820    draw_set_clip_state(i915->draw, clip);
 821
 822    i915->dirty |= I915_NEW_CLIP;
 823 }
 824
 825
 826
 827 /* Called when driver state tracker notices changes to the viewport
 828  * matrix:
 829  */
 830 static void i915_set_viewport_states( struct pipe_context *pipe,
 831                                       unsigned start_slot,
 832                                       unsigned num_viewports,
 833                                      const struct pipe_viewport_state *viewport )
 834 {
 835    struct i915_context *i915 = i915_context(pipe);
 836
 837    i915->viewport = *viewport; /* struct copy */
 838
 839    /* pass the viewport info to the draw module */
 840    draw_set_viewport_states(i915->draw, start_slot, num_viewports,
 841                             &i915->viewport);
 842
 843    i915->dirty |= I915_NEW_VIEWPORT;
 844 }
 845
 846
 847 static void *
 848 i915_create_rasterizer_state(struct pipe_context *pipe,
 849                              const struct pipe_rasterizer_state *rasterizer)
 850 {
 851    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 852
 853    cso->templ = *rasterizer;
 854    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 855    cso->light_twoside = rasterizer->light_twoside;
 856    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 857    cso->ds[1].f = rasterizer->offset_scale;
 858    if (rasterizer->poly_stipple_enable) {
 859       cso->st |= ST1_ENABLE;
 860    }
 861
 862    if (rasterizer->scissor)
 863       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 864    else
 865       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 866
 867    switch (rasterizer->cull_face) {
 868    case PIPE_FACE_NONE:
 869       cso->LIS4 |= S4_CULLMODE_NONE;
 870       break;
 871    case PIPE_FACE_FRONT:
 872       if (rasterizer->front_ccw)
 873          cso->LIS4 |= S4_CULLMODE_CCW;
 874       else
 875          cso->LIS4 |= S4_CULLMODE_CW;
 876       break;
 877    case PIPE_FACE_BACK:
 878       if (rasterizer->front_ccw)
 879          cso->LIS4 |= S4_CULLMODE_CW;
 880       else
 881          cso->LIS4 |= S4_CULLMODE_CCW;
 882       break;
 883    case PIPE_FACE_FRONT_AND_BACK:
 884       cso->LIS4 |= S4_CULLMODE_BOTH;
 885       break;
 886    }
 887
 888    {
 889       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 890
 891       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 892
 893       if (rasterizer->line_smooth)
 894          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 895    }
 896
 897    {
 898       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 899
 900       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 901    }
 902
 903    if (rasterizer->flatshade) {
 904       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 905                     S4_FLATSHADE_COLOR |
 906                     S4_FLATSHADE_SPECULAR);
 907    }
 908
 909    cso->LIS7 = fui( rasterizer->offset_units );
 910
 911
 912    return cso;
 913 }
 914
 915 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 916                                         void *raster )
 917 {
 918    struct i915_context *i915 = i915_context(pipe);
 919
 920    if (i915->rasterizer == raster)
 921       return;
 922
 923    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 924
 925    /* pass-through to draw module */
 926    draw_set_rasterizer_state(i915->draw,
 927                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 928                            raster);
 929
 930    i915->dirty |= I915_NEW_RASTERIZER;
 931 }
 932
 933 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 934                                          void *raster)
 935 {
 936    FREE(raster);
 937 }
 938
 939 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 940                                     unsigned start_slot, unsigned count,
 941                                     const struct pipe_vertex_buffer *buffers)
 942 {
 943    struct i915_context *i915 = i915_context(pipe);
 944    struct draw_context *draw = i915->draw;
 945
 946    util_set_vertex_buffers_count(i915->vertex_buffers,
 947                                  &i915->nr_vertex_buffers,
 948                                  buffers, start_slot, count);
 949
 950    /* pass-through to draw module */
 951    draw_set_vertex_buffers(draw, start_slot, count, buffers);
 952 }
 953
 954 static void *
 955 i915_create_vertex_elements_state(struct pipe_context *pipe,
 956                                   unsigned count,
 957                                   const struct pipe_vertex_element *attribs)
 958 {
 959    struct i915_velems_state *velems;
 960    assert(count <= PIPE_MAX_ATTRIBS);
 961    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 962    if (velems) {
 963       velems->count = count;
 964       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
 965    }
 966    return velems;
 967 }
 968
 969 static void
 970 i915_bind_vertex_elements_state(struct pipe_context *pipe,
 971                                 void *velems)
 972 {
 973    struct i915_context *i915 = i915_context(pipe);
 974    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
 975
 976    if (i915->velems == velems)
 977       return;
 978
 979    i915->velems = velems;
 980
 981    /* pass-through to draw module */
 982    if (i915_velems) {
 983       draw_set_vertex_elements(i915->draw,
 984             i915_velems->count, i915_velems->velem);
 985    }
 986 }
 987
 988 static void
 989 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
 990 {
 991    FREE( velems );
 992 }
 993
 994 static void i915_set_index_buffer(struct pipe_context *pipe,
 995                                   const struct pipe_index_buffer *ib)
 996 {
 997    struct i915_context *i915 = i915_context(pipe);
 998
 999    if (ib)
1000       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1001    else
1002       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1003 }
1004
1005 static void
1006 i915_set_sample_mask(struct pipe_context *pipe,
1007                      unsigned sample_mask)
1008 {
1009 }
1010
1011 void
1012 i915_init_state_functions( struct i915_context *i915 )
1013 {
1014    i915->base.create_blend_state = i915_create_blend_state;
1015    i915->base.bind_blend_state = i915_bind_blend_state;
1016    i915->base.delete_blend_state = i915_delete_blend_state;
1017
1018    i915->base.create_sampler_state = i915_create_sampler_state;
1019    i915->base.bind_fragment_sampler_states = i915_bind_fragment_sampler_states;
1020    i915->base.bind_vertex_sampler_states = i915_bind_vertex_sampler_states;
1021    i915->base.delete_sampler_state = i915_delete_sampler_state;
1022
1023    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1024    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1025    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1026
1027    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1028    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1029    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1030    i915->base.create_fs_state = i915_create_fs_state;
1031    i915->base.bind_fs_state = i915_bind_fs_state;
1032    i915->base.delete_fs_state = i915_delete_fs_state;
1033    i915->base.create_vs_state = i915_create_vs_state;
1034    i915->base.bind_vs_state = i915_bind_vs_state;
1035    i915->base.delete_vs_state = i915_delete_vs_state;
1036    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1037    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1038    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1039
1040    i915->base.set_blend_color = i915_set_blend_color;
1041    i915->base.set_stencil_ref = i915_set_stencil_ref;
1042    i915->base.set_clip_state = i915_set_clip_state;
1043    i915->base.set_sample_mask = i915_set_sample_mask;
1044    i915->base.set_constant_buffer = i915_set_constant_buffer;
1045    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1046
1047    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1048    i915->base.set_scissor_states = i915_set_scissor_states;
1049    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
1050    i915->base.set_vertex_sampler_views = i915_set_vertex_sampler_views;
1051    i915->base.create_sampler_view = i915_create_sampler_view;
1052    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1053    i915->base.set_viewport_states = i915_set_viewport_states;
1054    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1055    i915->base.set_index_buffer = i915_set_index_buffer;
1056 }