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
 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 i915_fixup_bind_sampler_states(struct pipe_context *pipe,
 295                                            unsigned num, void **sampler)
 296 {
 297    struct i915_context *i915 = i915_context(pipe);
 298
 299    i915->saved_nr_samplers = num;
 300    memcpy(&i915->saved_samplers, sampler, sizeof(void *) * num);
 301
 302    i915->saved_bind_sampler_states(pipe, num, sampler);
 303 }
 304
 305 static void
 306 i915_bind_vertex_sampler_states(struct pipe_context *pipe,
 307                                 unsigned num_samplers,
 308                                 void **samplers)
 309 {
 310    struct i915_context *i915 = i915_context(pipe);
 311    unsigned i;
 312
 313    assert(num_samplers <= PIPE_MAX_VERTEX_SAMPLERS);
 314
 315    /* Check for no-op */
 316    if (num_samplers == i915->num_vertex_samplers &&
 317        !memcmp(i915->vertex_samplers, samplers, num_samplers * sizeof(void *)))
 318       return;
 319
 320    for (i = 0; i < num_samplers; ++i)
 321       i915->vertex_samplers[i] = samplers[i];
 322    for (i = num_samplers; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 323       i915->vertex_samplers[i] = NULL;
 324
 325    i915->num_vertex_samplers = num_samplers;
 326
 327    draw_set_samplers(i915->draw,
 328                      i915->vertex_samplers,
 329                      i915->num_vertex_samplers);
 330 }
 331
 332
 333
 334 static void i915_bind_fragment_sampler_states(struct pipe_context *pipe,
 335                                      unsigned num, void **sampler)
 336 {
 337    struct i915_context *i915 = i915_context(pipe);
 338    unsigned i;
 339
 340    /* Check for no-op */
 341    if (num == i915->num_samplers &&
 342        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 343       return;
 344
 345    for (i = 0; i < num; ++i)
 346       i915->sampler[i] = sampler[i];
 347    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 348       i915->sampler[i] = NULL;
 349
 350    i915->num_samplers = num;
 351
 352    i915->dirty |= I915_NEW_SAMPLER;
 353 }
 354
 355 static void i915_delete_sampler_state(struct pipe_context *pipe,
 356                                       void *sampler)
 357 {
 358    FREE(sampler);
 359 }
 360
 361
 362 /**
 363  * Called before drawing VBO to map vertex samplers and hand them to draw
 364  */
 365 void
 366 i915_prepare_vertex_sampling(struct i915_context *i915)
 367 {
 368    struct i915_winsys *iws = i915->iws;
 369    unsigned i,j;
 370    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
 371    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
 372    const void* data[PIPE_MAX_TEXTURE_LEVELS];
 373    unsigned num = i915->num_vertex_sampler_views;
 374    struct pipe_sampler_view **views = i915->vertex_sampler_views;
 375
 376    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 377    if (!num)
 378       return;
 379
 380    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 381       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 382
 383       if (view) {
 384          struct pipe_resource *tex = view->texture;
 385          struct i915_texture *i915_tex = i915_texture(tex);
 386          ubyte *addr;
 387
 388          /* We're referencing the texture's internal data, so save a
 389           * reference to it.
 390           */
 391          pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
 392
 393          i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
 394          addr = iws->buffer_map(iws,
 395                                 i915_tex->buffer,
 396                                 FALSE /* read only */);
 397
 398          /* Setup array of mipmap level pointers */
 399          /* FIXME: handle 3D textures? */
 400          for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
 401             unsigned offset = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
 402             data[j] = addr + offset;
 403             row_stride[j] = i915_tex->stride;
 404             img_stride[j] = 0; /* FIXME */;
 405          }
 406
 407          draw_set_mapped_texture(i915->draw,
 408                                  i,
 409                                  tex->width0, tex->height0, tex->depth0,
 410                                  view->u.tex.first_level, tex->last_level,
 411                                  row_stride, img_stride, data);
 412       } else
 413          i915->mapped_vs_tex[i] = NULL;
 414    }
 415 }
 416
 417 void
 418 i915_cleanup_vertex_sampling(struct i915_context *i915)
 419 {
 420    struct i915_winsys *iws = i915->iws;
 421    unsigned i;
 422    for (i = 0; i < Elements(i915->mapped_vs_tex); i++) {
 423       if (i915->mapped_vs_tex_buffer[i]) {
 424          iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
 425          pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
 426       }
 427    }
 428 }
 429
 430
 431
 432 /** XXX move someday?  Or consolidate all these simple state setters
 433  * into one file.
 434  */
 435
 436 static void *
 437 i915_create_depth_stencil_state(struct pipe_context *pipe,
 438                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 439 {
 440    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 441
 442    {
 443       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 444       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 445
 446       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 447                               ENABLE_STENCIL_TEST_MASK |
 448                               STENCIL_TEST_MASK(testmask) |
 449                               ENABLE_STENCIL_WRITE_MASK |
 450                               STENCIL_WRITE_MASK(writemask));
 451    }
 452
 453    if (depth_stencil->stencil[0].enabled) {
 454       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 455       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 456       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 457       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 458
 459       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 460                             S5_STENCIL_WRITE_ENABLE |
 461                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 462                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 463                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 464                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 465    }
 466
 467    if (depth_stencil->stencil[1].enabled) {
 468       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 469       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 470       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 471       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 472       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 473       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 474
 475       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 476                      BFO_ENABLE_STENCIL_FUNCS |
 477                      BFO_ENABLE_STENCIL_TWO_SIDE |
 478                      BFO_ENABLE_STENCIL_REF |
 479                      BFO_STENCIL_TWO_SIDE |
 480                      (test << BFO_STENCIL_TEST_SHIFT) |
 481                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 482                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 483                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 484
 485       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 486                      BFM_ENABLE_STENCIL_TEST_MASK |
 487                      BFM_ENABLE_STENCIL_WRITE_MASK |
 488                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 489                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 490    }
 491    else {
 492       /* This actually disables two-side stencil: The bit set is a
 493        * modify-enable bit to indicate we are changing the two-side
 494        * setting.  Then there is a symbolic zero to show that we are
 495        * setting the flag to zero/off.
 496        */
 497       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 498                      BFO_ENABLE_STENCIL_TWO_SIDE |
 499                      0);
 500       cso->bfo[1] = 0;
 501    }
 502
 503    if (depth_stencil->depth.enabled) {
 504       int func = i915_translate_compare_func(depth_stencil->depth.func);
 505
 506       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 507                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 508
 509       if (depth_stencil->depth.writemask)
 510          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 511    }
 512
 513    if (depth_stencil->alpha.enabled) {
 514       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 515       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 516
 517       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 518                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 519                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 520    }
 521
 522    return cso;
 523 }
 524
 525 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 526                                           void *depth_stencil)
 527 {
 528    struct i915_context *i915 = i915_context(pipe);
 529
 530    if (i915->depth_stencil == depth_stencil)
 531       return;
 532
 533    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 534
 535    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 536 }
 537
 538 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 539                                             void *depth_stencil)
 540 {
 541    FREE(depth_stencil);
 542 }
 543
 544
 545 static void i915_set_scissor_state( struct pipe_context *pipe,
 546                                  const struct pipe_scissor_state *scissor )
 547 {
 548    struct i915_context *i915 = i915_context(pipe);
 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
 587    if (i915->saved_fs == shader)
 588       return;
 589
 590    i915->saved_fs = shader;
 591
 592    i915->saved_bind_fs_state(pipe, shader);
 593 }
 594
 595 static void
 596 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 597 {
 598    struct i915_context *i915 = i915_context(pipe);
 599
 600    if (i915->fs == shader)
 601       return;
 602
 603    i915->fs = (struct i915_fragment_shader*) shader;
 604
 605    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 606
 607    i915->dirty |= I915_NEW_FS;
 608 }
 609
 610 static
 611 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 612 {
 613    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 614
 615    if (ifs->decl) {
 616       FREE(ifs->decl);
 617       ifs->decl = NULL;
 618    }
 619
 620    if (ifs->program) {
 621       FREE(ifs->program);
 622       ifs->program = NULL;
 623       FREE((struct tgsi_token *)ifs->state.tokens);
 624       ifs->state.tokens = NULL;
 625    }
 626    ifs->program_len = 0;
 627    ifs->decl_len = 0;
 628
 629    FREE(ifs);
 630 }
 631
 632
 633 static void *
 634 i915_create_vs_state(struct pipe_context *pipe,
 635                      const struct pipe_shader_state *templ)
 636 {
 637    struct i915_context *i915 = i915_context(pipe);
 638
 639    /* just pass-through to draw module */
 640    return draw_create_vertex_shader(i915->draw, templ);
 641 }
 642
 643 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 644 {
 645    struct i915_context *i915 = i915_context(pipe);
 646
 647    if (i915->saved_vs == shader)
 648       return;
 649
 650    i915->saved_vs = shader;
 651
 652    /* just pass-through to draw module */
 653    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 654
 655    i915->dirty |= I915_NEW_VS;
 656 }
 657
 658 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 659 {
 660    struct i915_context *i915 = i915_context(pipe);
 661
 662    /* just pass-through to draw module */
 663    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 664 }
 665
 666 static void i915_set_constant_buffer(struct pipe_context *pipe,
 667                                      uint shader, uint index,
 668                                      struct pipe_constant_buffer *cb)
 669 {
 670    struct i915_context *i915 = i915_context(pipe);
 671    struct pipe_resource *buf = cb ? cb->buffer : NULL;
 672    unsigned new_num = 0;
 673    boolean diff = TRUE;
 674
 675    if (cb && cb->user_buffer) {
 676       buf = i915_user_buffer_create(pipe->screen, cb->user_buffer,
 677                                     cb->buffer_size,
 678                                     PIPE_BIND_CONSTANT_BUFFER);
 679    }
 680
 681    /* XXX don't support geom shaders now */
 682    if (shader == PIPE_SHADER_GEOMETRY)
 683       return;
 684
 685    /* if we have a new buffer compare it with the old one */
 686    if (buf) {
 687       struct i915_buffer *ibuf = i915_buffer(buf);
 688       struct pipe_resource *old_buf = i915->constants[shader];
 689       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 690       unsigned old_num = i915->current.num_user_constants[shader];
 691
 692       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 693
 694       if (old_num == new_num) {
 695          if (old_num == 0)
 696             diff = FALSE;
 697 #if 0
 698          /* XXX no point in running this code since st/mesa only uses user buffers */
 699          /* Can't compare the buffer data since they are userbuffers */
 700          else if (old && old->free_on_destroy)
 701             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 702 #else
 703          (void)old;
 704 #endif
 705       }
 706    } else {
 707       diff = i915->current.num_user_constants[shader] != 0;
 708    }
 709
 710    pipe_resource_reference(&i915->constants[shader], buf);
 711    i915->current.num_user_constants[shader] = new_num;
 712
 713    if (diff)
 714       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 715
 716    if (cb && cb->user_buffer) {
 717       pipe_resource_reference(&buf, NULL);
 718    }
 719 }
 720
 721
 722 static void
 723 i915_fixup_set_fragment_sampler_views(struct pipe_context *pipe,
 724                                       unsigned num,
 725                                       struct pipe_sampler_view **views)
 726 {
 727    struct i915_context *i915 = i915_context(pipe);
 728    int i;
 729
 730    for (i = 0; i < num; i++)
 731       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 732                                   views[i]);
 733
 734    for (i = num; i < i915->saved_nr_sampler_views; i++)
 735       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 736                                   NULL);
 737
 738    i915->saved_nr_sampler_views = num;
 739
 740    i915->saved_set_sampler_views(pipe, num, views);
 741 }
 742
 743 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 744                                             unsigned num,
 745                                             struct pipe_sampler_view **views)
 746 {
 747    struct i915_context *i915 = i915_context(pipe);
 748    uint i;
 749
 750    assert(num <= PIPE_MAX_SAMPLERS);
 751
 752    /* Check for no-op */
 753    if (num == i915->num_fragment_sampler_views &&
 754        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 755       return;
 756
 757    for (i = 0; i < num; i++)
 758       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 759                                   views[i]);
 760
 761    for (i = num; i < i915->num_fragment_sampler_views; i++)
 762       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 763                                   NULL);
 764
 765    i915->num_fragment_sampler_views = num;
 766
 767    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 768 }
 769
 770 static void
 771 i915_set_vertex_sampler_views(struct pipe_context *pipe,
 772                               unsigned num,
 773                               struct pipe_sampler_view **views)
 774 {
 775    struct i915_context *i915 = i915_context(pipe);
 776    uint i;
 777
 778    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 779
 780    /* Check for no-op */
 781    if (num == i915->num_vertex_sampler_views &&
 782        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 783       return;
 784    }
 785
 786    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 787       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 788
 789       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
 790    }
 791
 792    i915->num_vertex_sampler_views = num;
 793
 794    draw_set_sampler_views(i915->draw,
 795                           i915->vertex_sampler_views,
 796                           i915->num_vertex_sampler_views);
 797 }
 798
 799
 800 static struct pipe_sampler_view *
 801 i915_create_sampler_view(struct pipe_context *pipe,
 802                          struct pipe_resource *texture,
 803                          const struct pipe_sampler_view *templ)
 804 {
 805    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 806
 807    if (view) {
 808       *view = *templ;
 809       view->reference.count = 1;
 810       view->texture = NULL;
 811       pipe_resource_reference(&view->texture, texture);
 812       view->context = pipe;
 813    }
 814
 815    return view;
 816 }
 817
 818
 819 static void
 820 i915_sampler_view_destroy(struct pipe_context *pipe,
 821                           struct pipe_sampler_view *view)
 822 {
 823    pipe_resource_reference(&view->texture, NULL);
 824    FREE(view);
 825 }
 826
 827
 828 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 829                                        const struct pipe_framebuffer_state *fb)
 830 {
 831    struct i915_context *i915 = i915_context(pipe);
 832    int i;
 833
 834    i915->framebuffer.width = fb->width;
 835    i915->framebuffer.height = fb->height;
 836    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 837    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 838       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 839                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 840    }
 841    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 842
 843    i915->dirty |= I915_NEW_FRAMEBUFFER;
 844 }
 845
 846
 847
 848 static void i915_set_clip_state( struct pipe_context *pipe,
 849                              const struct pipe_clip_state *clip )
 850 {
 851    struct i915_context *i915 = i915_context(pipe);
 852
 853    i915->saved_clip = *clip;
 854
 855    draw_set_clip_state(i915->draw, clip);
 856
 857    i915->dirty |= I915_NEW_CLIP;
 858 }
 859
 860
 861
 862 /* Called when driver state tracker notices changes to the viewport
 863  * matrix:
 864  */
 865 static void i915_set_viewport_state( struct pipe_context *pipe,
 866                                      const struct pipe_viewport_state *viewport )
 867 {
 868    struct i915_context *i915 = i915_context(pipe);
 869
 870    i915->viewport = *viewport; /* struct copy */
 871
 872    /* pass the viewport info to the draw module */
 873    draw_set_viewport_state(i915->draw, &i915->viewport);
 874
 875    i915->dirty |= I915_NEW_VIEWPORT;
 876 }
 877
 878
 879 static void *
 880 i915_create_rasterizer_state(struct pipe_context *pipe,
 881                              const struct pipe_rasterizer_state *rasterizer)
 882 {
 883    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 884
 885    cso->templ = *rasterizer;
 886    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 887    cso->light_twoside = rasterizer->light_twoside;
 888    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 889    cso->ds[1].f = rasterizer->offset_scale;
 890    if (rasterizer->poly_stipple_enable) {
 891       cso->st |= ST1_ENABLE;
 892    }
 893
 894    if (rasterizer->scissor)
 895       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 896    else
 897       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 898
 899    switch (rasterizer->cull_face) {
 900    case PIPE_FACE_NONE:
 901       cso->LIS4 |= S4_CULLMODE_NONE;
 902       break;
 903    case PIPE_FACE_FRONT:
 904       if (rasterizer->front_ccw)
 905          cso->LIS4 |= S4_CULLMODE_CCW;
 906       else
 907          cso->LIS4 |= S4_CULLMODE_CW;
 908       break;
 909    case PIPE_FACE_BACK:
 910       if (rasterizer->front_ccw)
 911          cso->LIS4 |= S4_CULLMODE_CW;
 912       else
 913          cso->LIS4 |= S4_CULLMODE_CCW;
 914       break;
 915    case PIPE_FACE_FRONT_AND_BACK:
 916       cso->LIS4 |= S4_CULLMODE_BOTH;
 917       break;
 918    }
 919
 920    {
 921       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 922
 923       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 924
 925       if (rasterizer->line_smooth)
 926          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 927    }
 928
 929    {
 930       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 931
 932       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 933    }
 934
 935    if (rasterizer->flatshade) {
 936       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 937                     S4_FLATSHADE_COLOR |
 938                     S4_FLATSHADE_SPECULAR);
 939    }
 940
 941    cso->LIS7 = fui( rasterizer->offset_units );
 942
 943
 944    return cso;
 945 }
 946
 947 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 948                                         void *raster )
 949 {
 950    struct i915_context *i915 = i915_context(pipe);
 951
 952    if (i915->rasterizer == raster)
 953       return;
 954
 955    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 956
 957    /* pass-through to draw module */
 958    draw_set_rasterizer_state(i915->draw,
 959                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 960                            raster);
 961
 962    i915->dirty |= I915_NEW_RASTERIZER;
 963 }
 964
 965 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 966                                          void *raster)
 967 {
 968    FREE(raster);
 969 }
 970
 971 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 972                                     unsigned count,
 973                                     const struct pipe_vertex_buffer *buffers)
 974 {
 975    struct i915_context *i915 = i915_context(pipe);
 976    struct draw_context *draw = i915->draw;
 977    int i;
 978
 979    util_copy_vertex_buffers(i915->saved_vertex_buffers,
 980                             &i915->saved_nr_vertex_buffers,
 981                             buffers, count);
 982 #if 0
 983    /* XXX doesn't look like this is needed */
 984    /* unmap old */
 985    for (i = 0; i < i915->num_vertex_buffers; i++) {
 986       draw_set_mapped_vertex_buffer(draw, i, NULL);
 987    }
 988 #endif
 989
 990    /* pass-through to draw module */
 991    draw_set_vertex_buffers(draw, count, buffers);
 992
 993    /* map new */
 994    for (i = 0; i < count; i++) {
 995       const void *buf = buffers[i].user_buffer;
 996       if (!buf)
 997             buf = i915_buffer(buffers[i].buffer)->data;
 998       draw_set_mapped_vertex_buffer(draw, i, buf);
 999    }
1000 }
1001
1002 static void *
1003 i915_create_vertex_elements_state(struct pipe_context *pipe,
1004                                   unsigned count,
1005                                   const struct pipe_vertex_element *attribs)
1006 {
1007    struct i915_velems_state *velems;
1008    assert(count <= PIPE_MAX_ATTRIBS);
1009    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
1010    if (velems) {
1011       velems->count = count;
1012       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
1013    }
1014    return velems;
1015 }
1016
1017 static void
1018 i915_bind_vertex_elements_state(struct pipe_context *pipe,
1019                                 void *velems)
1020 {
1021    struct i915_context *i915 = i915_context(pipe);
1022    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
1023
1024    if (i915->saved_velems == velems)
1025       return;
1026
1027    i915->saved_velems = velems;
1028
1029    /* pass-through to draw module */
1030    if (i915_velems) {
1031       draw_set_vertex_elements(i915->draw,
1032             i915_velems->count, i915_velems->velem);
1033    }
1034 }
1035
1036 static void
1037 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
1038 {
1039    FREE( velems );
1040 }
1041
1042 static void i915_set_index_buffer(struct pipe_context *pipe,
1043                                   const struct pipe_index_buffer *ib)
1044 {
1045    struct i915_context *i915 = i915_context(pipe);
1046
1047    if (ib)
1048       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1049    else
1050       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1051
1052    /* pass-through to draw module */
1053    draw_set_index_buffer(i915->draw, ib);
1054 }
1055
1056 static void
1057 i915_set_sample_mask(struct pipe_context *pipe,
1058                      unsigned sample_mask)
1059 {
1060 }
1061
1062 void
1063 i915_init_state_functions( struct i915_context *i915 )
1064 {
1065    i915->base.create_blend_state = i915_create_blend_state;
1066    i915->base.bind_blend_state = i915_bind_blend_state;
1067    i915->base.delete_blend_state = i915_delete_blend_state;
1068
1069    i915->base.create_sampler_state = i915_create_sampler_state;
1070    i915->base.bind_fragment_sampler_states = i915_bind_fragment_sampler_states;
1071    i915->base.bind_vertex_sampler_states = i915_bind_vertex_sampler_states;
1072    i915->base.delete_sampler_state = i915_delete_sampler_state;
1073
1074    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1075    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1076    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1077
1078    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1079    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1080    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1081    i915->base.create_fs_state = i915_create_fs_state;
1082    i915->base.bind_fs_state = i915_bind_fs_state;
1083    i915->base.delete_fs_state = i915_delete_fs_state;
1084    i915->base.create_vs_state = i915_create_vs_state;
1085    i915->base.bind_vs_state = i915_bind_vs_state;
1086    i915->base.delete_vs_state = i915_delete_vs_state;
1087    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1088    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1089    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1090
1091    i915->base.set_blend_color = i915_set_blend_color;
1092    i915->base.set_stencil_ref = i915_set_stencil_ref;
1093    i915->base.set_clip_state = i915_set_clip_state;
1094    i915->base.set_sample_mask = i915_set_sample_mask;
1095    i915->base.set_constant_buffer = i915_set_constant_buffer;
1096    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1097
1098    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1099    i915->base.set_scissor_state = i915_set_scissor_state;
1100    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
1101    i915->base.set_vertex_sampler_views = i915_set_vertex_sampler_views;
1102    i915->base.create_sampler_view = i915_create_sampler_view;
1103    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1104    i915->base.set_viewport_state = i915_set_viewport_state;
1105    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1106    i915->base.set_index_buffer = i915_set_index_buffer;
1107 }
1108
1109 void
1110 i915_init_fixup_state_functions( struct i915_context *i915 )
1111 {
1112    i915->saved_bind_fs_state = i915->base.bind_fs_state;
1113    i915->base.bind_fs_state = i915_fixup_bind_fs_state;
1114    i915->saved_bind_sampler_states = i915->base.bind_fragment_sampler_states;
1115    i915->base.bind_fragment_sampler_states = i915_fixup_bind_sampler_states;
1116    i915->saved_set_sampler_views = i915->base.set_fragment_sampler_views;
1117    i915->base.set_fragment_sampler_views = i915_fixup_set_fragment_sampler_views;
1118 }