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_inlines.h"
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36 #include "util/u_transfer.h"
  37 #include "tgsi/tgsi_parse.h"
  38
  39 #include "i915_context.h"
  40 #include "i915_reg.h"
  41 #include "i915_state_inlines.h"
  42 #include "i915_fpc.h"
  43 #include "i915_resource.h"
  44
  45 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  46  * Intel drivers for "other operating systems" implement GL_CLAMP as
  47  * GL_CLAMP_TO_EDGE, so the same is done here.
  48  */
  49 static unsigned
  50 translate_wrap_mode(unsigned wrap)
  51 {
  52    switch (wrap) {
  53    case PIPE_TEX_WRAP_REPEAT:
  54       return TEXCOORDMODE_WRAP;
  55    case PIPE_TEX_WRAP_CLAMP:
  56       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  57    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  58       return TEXCOORDMODE_CLAMP_EDGE;
  59    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  60       return TEXCOORDMODE_CLAMP_BORDER;
  61    case PIPE_TEX_WRAP_MIRROR_REPEAT:
  62       return TEXCOORDMODE_MIRROR;
  63    default:
  64       return TEXCOORDMODE_WRAP;
  65    }
  66 }
  67
  68 static unsigned translate_img_filter( unsigned filter )
  69 {
  70    switch (filter) {
  71    case PIPE_TEX_FILTER_NEAREST:
  72       return FILTER_NEAREST;
  73    case PIPE_TEX_FILTER_LINEAR:
  74       return FILTER_LINEAR;
  75    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->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    /* XXX here take the target fixup into account */
 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    draw_flush(i915->draw);
 181
 182    i915->blend = (struct i915_blend_state*)blend;
 183
 184    i915->dirty |= I915_NEW_BLEND;
 185 }
 186
 187
 188 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 189 {
 190    FREE(blend);
 191 }
 192
 193 static void i915_set_blend_color( struct pipe_context *pipe,
 194                                   const struct pipe_blend_color *blend_color )
 195 {
 196    struct i915_context *i915 = i915_context(pipe);
 197    draw_flush(i915->draw);
 198
 199    i915->blend_color = *blend_color;
 200
 201    i915->dirty |= I915_NEW_BLEND;
 202 }
 203
 204 static void i915_set_stencil_ref( struct pipe_context *pipe,
 205                                   const struct pipe_stencil_ref *stencil_ref )
 206 {
 207    struct i915_context *i915 = i915_context(pipe);
 208    draw_flush(i915->draw);
 209
 210    i915->stencil_ref = *stencil_ref;
 211
 212    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 213 }
 214
 215 static void *
 216 i915_create_sampler_state(struct pipe_context *pipe,
 217                           const struct pipe_sampler_state *sampler)
 218 {
 219    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 220    const unsigned ws = sampler->wrap_s;
 221    const unsigned wt = sampler->wrap_t;
 222    const unsigned wr = sampler->wrap_r;
 223    unsigned minFilt, magFilt;
 224    unsigned mipFilt;
 225
 226    cso->templ = sampler;
 227
 228    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 229    minFilt = translate_img_filter( sampler->min_img_filter );
 230    magFilt = translate_img_filter( sampler->mag_img_filter );
 231
 232    if (sampler->max_anisotropy > 1)
 233       minFilt = magFilt = FILTER_ANISOTROPIC;
 234
 235    if (sampler->max_anisotropy > 2) {
 236       cso->state[0] |= SS2_MAX_ANISO_4;
 237    }
 238
 239    {
 240       int b = (int) (sampler->lod_bias * 16.0);
 241       b = CLAMP(b, -256, 255);
 242       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 243    }
 244
 245    /* Shadow:
 246     */
 247    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 248    {
 249       cso->state[0] |= (SS2_SHADOW_ENABLE |
 250                         i915_translate_shadow_compare_func(sampler->compare_func));
 251
 252       minFilt = FILTER_4X4_FLAT;
 253       magFilt = FILTER_4X4_FLAT;
 254    }
 255
 256    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 257                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 258                      (magFilt << SS2_MAG_FILTER_SHIFT));
 259
 260    cso->state[1] |=
 261       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 262        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 263        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 264
 265    if (sampler->normalized_coords)
 266       cso->state[1] |= SS3_NORMALIZED_COORDS;
 267
 268    {
 269       int minlod = (int) (16.0 * sampler->min_lod);
 270       int maxlod = (int) (16.0 * sampler->max_lod);
 271       minlod = CLAMP(minlod, 0, 16 * 11);
 272       maxlod = CLAMP(maxlod, 0, 16 * 11);
 273
 274       if (minlod > maxlod)
 275          maxlod = minlod;
 276
 277       cso->minlod = minlod;
 278       cso->maxlod = maxlod;
 279    }
 280
 281    {
 282       ubyte r = float_to_ubyte(sampler->border_color.f[0]);
 283       ubyte g = float_to_ubyte(sampler->border_color.f[1]);
 284       ubyte b = float_to_ubyte(sampler->border_color.f[2]);
 285       ubyte a = float_to_ubyte(sampler->border_color.f[3]);
 286       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 287    }
 288    return cso;
 289 }
 290
 291 static void i915_fixup_bind_sampler_states(struct pipe_context *pipe,
 292                                            unsigned num, void **sampler)
 293 {
 294    struct i915_context *i915 = i915_context(pipe);
 295
 296    i915->saved_nr_samplers = num;
 297    memcpy(&i915->saved_samplers, sampler, sizeof(void *) * num);
 298
 299    i915->saved_bind_sampler_states(pipe, num, sampler);
 300 }
 301
 302 static void
 303 i915_bind_vertex_sampler_states(struct pipe_context *pipe,
 304                                 unsigned num_samplers,
 305                                 void **samplers)
 306 {
 307    struct i915_context *i915 = i915_context(pipe);
 308    unsigned i;
 309
 310    assert(num_samplers <= PIPE_MAX_VERTEX_SAMPLERS);
 311
 312    /* Check for no-op */
 313    if (num_samplers == i915->num_vertex_samplers &&
 314        !memcmp(i915->vertex_samplers, samplers, num_samplers * sizeof(void *)))
 315       return;
 316
 317    draw_flush(i915->draw);
 318
 319    for (i = 0; i < num_samplers; ++i)
 320       i915->vertex_samplers[i] = samplers[i];
 321    for (i = num_samplers; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 322       i915->vertex_samplers[i] = NULL;
 323
 324    i915->num_vertex_samplers = num_samplers;
 325
 326    draw_set_samplers(i915->draw,
 327                      i915->vertex_samplers,
 328                      i915->num_vertex_samplers);
 329 }
 330
 331
 332
 333 static void i915_bind_fragment_sampler_states(struct pipe_context *pipe,
 334                                      unsigned num, void **sampler)
 335 {
 336    struct i915_context *i915 = i915_context(pipe);
 337    unsigned i;
 338
 339    /* Check for no-op */
 340    if (num == i915->num_samplers &&
 341        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 342       return;
 343
 344    draw_flush(i915->draw);
 345
 346    for (i = 0; i < num; ++i)
 347       i915->sampler[i] = sampler[i];
 348    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 349       i915->sampler[i] = NULL;
 350
 351    i915->num_samplers = num;
 352
 353    i915->dirty |= I915_NEW_SAMPLER;
 354 }
 355
 356 static void i915_delete_sampler_state(struct pipe_context *pipe,
 357                                       void *sampler)
 358 {
 359    FREE(sampler);
 360 }
 361
 362
 363 /**
 364  * Called before drawing VBO to map vertex samplers and hand them to draw
 365  */
 366 void
 367 i915_prepare_vertex_sampling(struct i915_context *i915,
 368                              unsigned num,
 369                              struct pipe_sampler_view **views)
 370 {
 371    struct i915_winsys *iws = i915->iws;
 372    unsigned i,j;
 373    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
 374    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
 375    const void* data[PIPE_MAX_TEXTURE_LEVELS];
 376
 377    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 378    if (!num)
 379       return;
 380
 381    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 382       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 383
 384       if (view) {
 385          struct pipe_resource *tex = view->texture;
 386          struct i915_texture *i915_tex = i915_texture(tex);
 387          void* addr;
 388
 389          /* We're referencing the texture's internal data, so save a
 390           * reference to it.
 391           */
 392          pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
 393
 394          i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
 395          addr = iws->buffer_map(iws,
 396                                 i915_tex->buffer,
 397                                 FALSE /* read only */);
 398
 399          /* Setup array of mipmap level pointers */
 400          /* FIXME: handle 3D textures? */
 401          for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
 402             unsigned offset = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
 403             data[j] = addr + offset;
 404             row_stride[j] = i915_tex->stride;
 405             img_stride[j] = 0; /* FIXME */;
 406          }
 407
 408          draw_set_mapped_texture(i915->draw,
 409                                  i,
 410                                  tex->width0, tex->height0, tex->depth0,
 411                                  view->u.tex.first_level, tex->last_level,
 412                                  row_stride, img_stride, data);
 413       } else
 414          i915->mapped_vs_tex[i] = NULL;
 415    }
 416 }
 417
 418 void
 419 i915_cleanup_vertex_sampling(struct i915_context *i915)
 420 {
 421    struct i915_winsys *iws = i915->iws;
 422    unsigned i;
 423    for (i = 0; i < Elements(i915->mapped_vs_tex); i++) {
 424       if (i915->mapped_vs_tex_buffer[i]) {
 425          iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
 426          pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
 427       }
 428    }
 429 }
 430
 431
 432
 433 /** XXX move someday?  Or consolidate all these simple state setters
 434  * into one file.
 435  */
 436
 437 static void *
 438 i915_create_depth_stencil_state(struct pipe_context *pipe,
 439                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 440 {
 441    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 442
 443    {
 444       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 445       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 446
 447       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 448                               ENABLE_STENCIL_TEST_MASK |
 449                               STENCIL_TEST_MASK(testmask) |
 450                               ENABLE_STENCIL_WRITE_MASK |
 451                               STENCIL_WRITE_MASK(writemask));
 452    }
 453
 454    if (depth_stencil->stencil[0].enabled) {
 455       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 456       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 457       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 458       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 459
 460       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 461                             S5_STENCIL_WRITE_ENABLE |
 462                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 463                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 464                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 465                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 466    }
 467
 468    if (depth_stencil->stencil[1].enabled) {
 469       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 470       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 471       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 472       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 473       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 474       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 475
 476       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 477                      BFO_ENABLE_STENCIL_FUNCS |
 478                      BFO_ENABLE_STENCIL_TWO_SIDE |
 479                      BFO_ENABLE_STENCIL_REF |
 480                      BFO_STENCIL_TWO_SIDE |
 481                      (test << BFO_STENCIL_TEST_SHIFT) |
 482                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 483                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 484                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 485
 486       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 487                      BFM_ENABLE_STENCIL_TEST_MASK |
 488                      BFM_ENABLE_STENCIL_WRITE_MASK |
 489                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 490                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 491    }
 492    else {
 493       /* This actually disables two-side stencil: The bit set is a
 494        * modify-enable bit to indicate we are changing the two-side
 495        * setting.  Then there is a symbolic zero to show that we are
 496        * setting the flag to zero/off.
 497        */
 498       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 499                      BFO_ENABLE_STENCIL_TWO_SIDE |
 500                      0);
 501       cso->bfo[1] = 0;
 502    }
 503
 504    if (depth_stencil->depth.enabled) {
 505       int func = i915_translate_compare_func(depth_stencil->depth.func);
 506
 507       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 508                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 509
 510       if (depth_stencil->depth.writemask)
 511          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 512    }
 513
 514    if (depth_stencil->alpha.enabled) {
 515       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 516       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 517
 518       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 519                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 520                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 521    }
 522
 523    return cso;
 524 }
 525
 526 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 527                                           void *depth_stencil)
 528 {
 529    struct i915_context *i915 = i915_context(pipe);
 530    draw_flush(i915->draw);
 531
 532    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 533
 534    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 535 }
 536
 537 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 538                                             void *depth_stencil)
 539 {
 540    FREE(depth_stencil);
 541 }
 542
 543
 544 static void i915_set_scissor_state( struct pipe_context *pipe,
 545                                  const struct pipe_scissor_state *scissor )
 546 {
 547    struct i915_context *i915 = i915_context(pipe);
 548    draw_flush(i915->draw);
 549
 550    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 551    i915->dirty |= I915_NEW_SCISSOR;
 552 }
 553
 554
 555 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 556                                    const struct pipe_poly_stipple *stipple )
 557 {
 558 }
 559
 560
 561
 562 static void *
 563 i915_create_fs_state(struct pipe_context *pipe,
 564                      const struct pipe_shader_state *templ)
 565 {
 566    struct i915_context *i915 = i915_context(pipe);
 567    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 568    if (!ifs)
 569       return NULL;
 570
 571    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
 572    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 573
 574    tgsi_scan_shader(templ->tokens, &ifs->info);
 575
 576    /* The shader's compiled to i915 instructions here */
 577    i915_translate_fragment_program(i915, ifs);
 578
 579    return ifs;
 580 }
 581
 582 static void
 583 i915_fixup_bind_fs_state(struct pipe_context *pipe, void *shader)
 584 {
 585    struct i915_context *i915 = i915_context(pipe);
 586    draw_flush(i915->draw);
 587
 588    i915->saved_fs = shader;
 589
 590    i915->saved_bind_fs_state(pipe, shader);
 591 }
 592
 593 static void
 594 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 595 {
 596    struct i915_context *i915 = i915_context(pipe);
 597    draw_flush(i915->draw);
 598
 599    i915->fs = (struct i915_fragment_shader*) shader;
 600
 601    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 602
 603    i915->dirty |= I915_NEW_FS;
 604 }
 605
 606 static
 607 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 608 {
 609    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 610
 611    if (ifs->program) {
 612       FREE(ifs->program);
 613       ifs->program = NULL;
 614       FREE((struct tgsi_token *)ifs->state.tokens);
 615       ifs->state.tokens = NULL;
 616    }
 617    ifs->program_len = 0;
 618
 619    FREE(ifs);
 620 }
 621
 622
 623 static void *
 624 i915_create_vs_state(struct pipe_context *pipe,
 625                      const struct pipe_shader_state *templ)
 626 {
 627    struct i915_context *i915 = i915_context(pipe);
 628
 629    /* just pass-through to draw module */
 630    return draw_create_vertex_shader(i915->draw, templ);
 631 }
 632
 633 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 634 {
 635    struct i915_context *i915 = i915_context(pipe);
 636
 637    i915->saved_vs = shader;
 638
 639    /* just pass-through to draw module */
 640    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 641
 642    i915->dirty |= I915_NEW_VS;
 643 }
 644
 645 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 646 {
 647    struct i915_context *i915 = i915_context(pipe);
 648
 649    /* just pass-through to draw module */
 650    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 651 }
 652
 653 static void i915_set_constant_buffer(struct pipe_context *pipe,
 654                                      uint shader, uint index,
 655                                      struct pipe_resource *buf)
 656 {
 657    struct i915_context *i915 = i915_context(pipe);
 658    unsigned new_num = 0;
 659    boolean diff = TRUE;
 660
 661
 662    /* XXX don't support geom shaders now */
 663    if (shader == PIPE_SHADER_GEOMETRY)
 664       return;
 665
 666    /* if we have a new buffer compare it with the old one */
 667    if (buf) {
 668       struct i915_buffer *ibuf = i915_buffer(buf);
 669       struct pipe_resource *old_buf = i915->constants[shader];
 670       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 671       unsigned old_num = i915->current.num_user_constants[shader];
 672
 673       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 674
 675       if (old_num == new_num) {
 676          if (old_num == 0)
 677             diff = FALSE;
 678 #if 0
 679          /* XXX no point in running this code since st/mesa only uses user buffers */
 680          /* Can't compare the buffer data since they are userbuffers */
 681          else if (old && old->free_on_destroy)
 682             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 683 #else
 684          (void)old;
 685 #endif
 686       }
 687    } else {
 688       diff = i915->current.num_user_constants[shader] != 0;
 689    }
 690
 691    /*
 692     * flush before updateing the state.
 693     */
 694    if (diff && shader == PIPE_SHADER_FRAGMENT)
 695       draw_flush(i915->draw);
 696
 697    pipe_resource_reference(&i915->constants[shader], buf);
 698    i915->current.num_user_constants[shader] = new_num;
 699
 700    if (diff)
 701       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 702 }
 703
 704
 705 static void
 706 i915_fixup_set_fragment_sampler_views(struct pipe_context *pipe,
 707                                       unsigned num,
 708                                       struct pipe_sampler_view **views)
 709 {
 710    struct i915_context *i915 = i915_context(pipe);
 711    int i;
 712
 713    for (i = 0; i < num; i++)
 714       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 715                                   views[i]);
 716
 717    for (i = num; i < i915->saved_nr_sampler_views; i++)
 718       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 719                                   NULL);
 720
 721    i915->saved_nr_sampler_views = num;
 722
 723    i915->saved_set_sampler_views(pipe, num, views);
 724 }
 725
 726 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 727                                             unsigned num,
 728                                             struct pipe_sampler_view **views)
 729 {
 730    struct i915_context *i915 = i915_context(pipe);
 731    uint i;
 732
 733    assert(num <= PIPE_MAX_SAMPLERS);
 734
 735    /* Check for no-op */
 736    if (num == i915->num_fragment_sampler_views &&
 737        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 738       return;
 739
 740    /* Fixes wrong texture in texobj with VBUF */
 741    draw_flush(i915->draw);
 742
 743    for (i = 0; i < num; i++)
 744       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 745                                   views[i]);
 746
 747    for (i = num; i < i915->num_fragment_sampler_views; i++)
 748       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 749                                   NULL);
 750
 751    i915->num_fragment_sampler_views = num;
 752
 753    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 754 }
 755
 756 static void
 757 i915_set_vertex_sampler_views(struct pipe_context *pipe,
 758                               unsigned num,
 759                               struct pipe_sampler_view **views)
 760 {
 761    struct i915_context *i915 = i915_context(pipe);
 762    uint i;
 763
 764    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 765
 766    /* Check for no-op */
 767    if (num == i915->num_vertex_sampler_views &&
 768        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 769       return;
 770    }
 771
 772    draw_flush(i915->draw);
 773
 774    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 775       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 776
 777       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
 778    }
 779
 780    i915->num_vertex_sampler_views = num;
 781
 782    draw_set_sampler_views(i915->draw,
 783                           i915->vertex_sampler_views,
 784                           i915->num_vertex_sampler_views);
 785 }
 786
 787
 788 static struct pipe_sampler_view *
 789 i915_create_sampler_view(struct pipe_context *pipe,
 790                          struct pipe_resource *texture,
 791                          const struct pipe_sampler_view *templ)
 792 {
 793    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 794
 795    if (view) {
 796       *view = *templ;
 797       view->reference.count = 1;
 798       view->texture = NULL;
 799       pipe_resource_reference(&view->texture, texture);
 800       view->context = pipe;
 801    }
 802
 803    return view;
 804 }
 805
 806
 807 static void
 808 i915_sampler_view_destroy(struct pipe_context *pipe,
 809                           struct pipe_sampler_view *view)
 810 {
 811    pipe_resource_reference(&view->texture, NULL);
 812    FREE(view);
 813 }
 814
 815
 816 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 817                                        const struct pipe_framebuffer_state *fb)
 818 {
 819    struct i915_context *i915 = i915_context(pipe);
 820    int i;
 821
 822    draw_flush(i915->draw);
 823
 824    i915->framebuffer.width = fb->width;
 825    i915->framebuffer.height = fb->height;
 826    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 827    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 828       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 829                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 830    }
 831    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 832
 833    i915->dirty |= I915_NEW_FRAMEBUFFER;
 834 }
 835
 836
 837
 838 static void i915_set_clip_state( struct pipe_context *pipe,
 839                              const struct pipe_clip_state *clip )
 840 {
 841    struct i915_context *i915 = i915_context(pipe);
 842    draw_flush(i915->draw);
 843
 844    i915->saved_clip = *clip;
 845
 846    draw_set_clip_state(i915->draw, clip);
 847
 848    i915->dirty |= I915_NEW_CLIP;
 849 }
 850
 851
 852
 853 /* Called when driver state tracker notices changes to the viewport
 854  * matrix:
 855  */
 856 static void i915_set_viewport_state( struct pipe_context *pipe,
 857                                      const struct pipe_viewport_state *viewport )
 858 {
 859    struct i915_context *i915 = i915_context(pipe);
 860
 861    i915->viewport = *viewport; /* struct copy */
 862
 863    /* pass the viewport info to the draw module */
 864    draw_set_viewport_state(i915->draw, &i915->viewport);
 865
 866    i915->dirty |= I915_NEW_VIEWPORT;
 867 }
 868
 869
 870 static void *
 871 i915_create_rasterizer_state(struct pipe_context *pipe,
 872                              const struct pipe_rasterizer_state *rasterizer)
 873 {
 874    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 875
 876    cso->templ = *rasterizer;
 877    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 878    cso->light_twoside = rasterizer->light_twoside;
 879    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 880    cso->ds[1].f = rasterizer->offset_scale;
 881    if (rasterizer->poly_stipple_enable) {
 882       cso->st |= ST1_ENABLE;
 883    }
 884
 885    if (rasterizer->scissor)
 886       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 887    else
 888       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 889
 890    switch (rasterizer->cull_face) {
 891    case PIPE_FACE_NONE:
 892       cso->LIS4 |= S4_CULLMODE_NONE;
 893       break;
 894    case PIPE_FACE_FRONT:
 895       if (rasterizer->front_ccw)
 896          cso->LIS4 |= S4_CULLMODE_CCW;
 897       else
 898          cso->LIS4 |= S4_CULLMODE_CW;
 899       break;
 900    case PIPE_FACE_BACK:
 901       if (rasterizer->front_ccw)
 902          cso->LIS4 |= S4_CULLMODE_CW;
 903       else
 904          cso->LIS4 |= S4_CULLMODE_CCW;
 905       break;
 906    case PIPE_FACE_FRONT_AND_BACK:
 907       cso->LIS4 |= S4_CULLMODE_BOTH;
 908       break;
 909    }
 910
 911    {
 912       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 913
 914       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 915
 916       if (rasterizer->line_smooth)
 917          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 918    }
 919
 920    {
 921       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 922
 923       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 924    }
 925
 926    if (rasterizer->flatshade) {
 927       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 928                     S4_FLATSHADE_COLOR |
 929                     S4_FLATSHADE_SPECULAR);
 930    }
 931
 932    cso->LIS7 = fui( rasterizer->offset_units );
 933
 934
 935    return cso;
 936 }
 937
 938 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 939                                         void *raster )
 940 {
 941    struct i915_context *i915 = i915_context(pipe);
 942
 943    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 944
 945    /* pass-through to draw module */
 946    draw_set_rasterizer_state(i915->draw,
 947                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 948                            raster);
 949
 950    i915->dirty |= I915_NEW_RASTERIZER;
 951 }
 952
 953 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 954                                          void *raster)
 955 {
 956    FREE(raster);
 957 }
 958
 959 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 960                                     unsigned count,
 961                                     const struct pipe_vertex_buffer *buffers)
 962 {
 963    struct i915_context *i915 = i915_context(pipe);
 964    struct draw_context *draw = i915->draw;
 965    int i;
 966
 967    util_copy_vertex_buffers(i915->saved_vertex_buffers,
 968                             &i915->saved_nr_vertex_buffers,
 969                             buffers, count);
 970 #if 0
 971    /* XXX doesn't look like this is needed */
 972    /* unmap old */
 973    for (i = 0; i < i915->num_vertex_buffers; i++) {
 974       draw_set_mapped_vertex_buffer(draw, i, NULL);
 975    }
 976 #endif
 977
 978    /* pass-through to draw module */
 979    draw_set_vertex_buffers(draw, count, buffers);
 980
 981    /* map new */
 982    for (i = 0; i < count; i++) {
 983       void *buf = i915_buffer(buffers[i].buffer)->data;
 984       draw_set_mapped_vertex_buffer(draw, i, buf);
 985    }
 986 }
 987
 988 static void *
 989 i915_create_vertex_elements_state(struct pipe_context *pipe,
 990                                   unsigned count,
 991                                   const struct pipe_vertex_element *attribs)
 992 {
 993    struct i915_velems_state *velems;
 994    assert(count <= PIPE_MAX_ATTRIBS);
 995    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 996    if (velems) {
 997       velems->count = count;
 998       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
 999    }
1000    return velems;
1001 }
1002
1003 static void
1004 i915_bind_vertex_elements_state(struct pipe_context *pipe,
1005                                 void *velems)
1006 {
1007    struct i915_context *i915 = i915_context(pipe);
1008    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
1009
1010    i915->saved_velems = velems;
1011
1012    /* pass-through to draw module */
1013    if (i915_velems) {
1014       draw_set_vertex_elements(i915->draw,
1015             i915_velems->count, i915_velems->velem);
1016    }
1017 }
1018
1019 static void
1020 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
1021 {
1022    FREE( velems );
1023 }
1024
1025 static void i915_set_index_buffer(struct pipe_context *pipe,
1026                                   const struct pipe_index_buffer *ib)
1027 {
1028    struct i915_context *i915 = i915_context(pipe);
1029
1030    if (ib)
1031       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1032    else
1033       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1034
1035    /* pass-through to draw module */
1036    draw_set_index_buffer(i915->draw, ib);
1037 }
1038
1039 static void
1040 i915_set_sample_mask(struct pipe_context *pipe,
1041                      unsigned sample_mask)
1042 {
1043 }
1044
1045 void
1046 i915_init_state_functions( struct i915_context *i915 )
1047 {
1048    i915->base.create_blend_state = i915_create_blend_state;
1049    i915->base.bind_blend_state = i915_bind_blend_state;
1050    i915->base.delete_blend_state = i915_delete_blend_state;
1051
1052    i915->base.create_sampler_state = i915_create_sampler_state;
1053    i915->base.bind_fragment_sampler_states = i915_bind_fragment_sampler_states;
1054    i915->base.bind_vertex_sampler_states = i915_bind_vertex_sampler_states;
1055    i915->base.delete_sampler_state = i915_delete_sampler_state;
1056
1057    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1058    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1059    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1060
1061    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1062    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1063    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1064    i915->base.create_fs_state = i915_create_fs_state;
1065    i915->base.bind_fs_state = i915_bind_fs_state;
1066    i915->base.delete_fs_state = i915_delete_fs_state;
1067    i915->base.create_vs_state = i915_create_vs_state;
1068    i915->base.bind_vs_state = i915_bind_vs_state;
1069    i915->base.delete_vs_state = i915_delete_vs_state;
1070    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1071    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1072    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1073
1074    i915->base.set_blend_color = i915_set_blend_color;
1075    i915->base.set_stencil_ref = i915_set_stencil_ref;
1076    i915->base.set_clip_state = i915_set_clip_state;
1077    i915->base.set_sample_mask = i915_set_sample_mask;
1078    i915->base.set_constant_buffer = i915_set_constant_buffer;
1079    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1080
1081    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1082    i915->base.set_scissor_state = i915_set_scissor_state;
1083    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
1084    i915->base.set_vertex_sampler_views = i915_set_vertex_sampler_views;
1085    i915->base.create_sampler_view = i915_create_sampler_view;
1086    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1087    i915->base.set_viewport_state = i915_set_viewport_state;
1088    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1089    i915->base.set_index_buffer = i915_set_index_buffer;
1090    i915->base.redefine_user_buffer = u_default_redefine_user_buffer;
1091 }
1092
1093 void
1094 i915_init_fixup_state_functions( struct i915_context *i915 )
1095 {
1096    i915->saved_bind_fs_state = i915->base.bind_fs_state;
1097    i915->base.bind_fs_state = i915_fixup_bind_fs_state;
1098    i915->saved_bind_sampler_states = i915->base.bind_fragment_sampler_states;
1099    i915->base.bind_fragment_sampler_states = i915_fixup_bind_sampler_states;
1100    i915->saved_set_sampler_views = i915->base.set_fragment_sampler_views;
1101    i915->base.set_fragment_sampler_views = i915_fixup_set_fragment_sampler_views;
1102 }