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
 676    /* XXX don't support geom shaders now */
 677    if (shader == PIPE_SHADER_GEOMETRY)
 678       return;
 679
 680    /* if we have a new buffer compare it with the old one */
 681    if (buf) {
 682       struct i915_buffer *ibuf = i915_buffer(buf);
 683       struct pipe_resource *old_buf = i915->constants[shader];
 684       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 685       unsigned old_num = i915->current.num_user_constants[shader];
 686
 687       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 688
 689       if (old_num == new_num) {
 690          if (old_num == 0)
 691             diff = FALSE;
 692 #if 0
 693          /* XXX no point in running this code since st/mesa only uses user buffers */
 694          /* Can't compare the buffer data since they are userbuffers */
 695          else if (old && old->free_on_destroy)
 696             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 697 #else
 698          (void)old;
 699 #endif
 700       }
 701    } else {
 702       diff = i915->current.num_user_constants[shader] != 0;
 703    }
 704
 705    pipe_resource_reference(&i915->constants[shader], buf);
 706    i915->current.num_user_constants[shader] = new_num;
 707
 708    if (diff)
 709       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 710 }
 711
 712
 713 static void
 714 i915_fixup_set_fragment_sampler_views(struct pipe_context *pipe,
 715                                       unsigned num,
 716                                       struct pipe_sampler_view **views)
 717 {
 718    struct i915_context *i915 = i915_context(pipe);
 719    int i;
 720
 721    for (i = 0; i < num; i++)
 722       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 723                                   views[i]);
 724
 725    for (i = num; i < i915->saved_nr_sampler_views; i++)
 726       pipe_sampler_view_reference(&i915->saved_sampler_views[i],
 727                                   NULL);
 728
 729    i915->saved_nr_sampler_views = num;
 730
 731    i915->saved_set_sampler_views(pipe, num, views);
 732 }
 733
 734 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 735                                             unsigned num,
 736                                             struct pipe_sampler_view **views)
 737 {
 738    struct i915_context *i915 = i915_context(pipe);
 739    uint i;
 740
 741    assert(num <= PIPE_MAX_SAMPLERS);
 742
 743    /* Check for no-op */
 744    if (num == i915->num_fragment_sampler_views &&
 745        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 746       return;
 747
 748    for (i = 0; i < num; i++)
 749       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 750                                   views[i]);
 751
 752    for (i = num; i < i915->num_fragment_sampler_views; i++)
 753       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 754                                   NULL);
 755
 756    i915->num_fragment_sampler_views = num;
 757
 758    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 759 }
 760
 761 static void
 762 i915_set_vertex_sampler_views(struct pipe_context *pipe,
 763                               unsigned num,
 764                               struct pipe_sampler_view **views)
 765 {
 766    struct i915_context *i915 = i915_context(pipe);
 767    uint i;
 768
 769    assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 770
 771    /* Check for no-op */
 772    if (num == i915->num_vertex_sampler_views &&
 773        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 774       return;
 775    }
 776
 777    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 778       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 779
 780       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
 781    }
 782
 783    i915->num_vertex_sampler_views = num;
 784
 785    draw_set_sampler_views(i915->draw,
 786                           i915->vertex_sampler_views,
 787                           i915->num_vertex_sampler_views);
 788 }
 789
 790
 791 static struct pipe_sampler_view *
 792 i915_create_sampler_view(struct pipe_context *pipe,
 793                          struct pipe_resource *texture,
 794                          const struct pipe_sampler_view *templ)
 795 {
 796    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 797
 798    if (view) {
 799       *view = *templ;
 800       view->reference.count = 1;
 801       view->texture = NULL;
 802       pipe_resource_reference(&view->texture, texture);
 803       view->context = pipe;
 804    }
 805
 806    return view;
 807 }
 808
 809
 810 static void
 811 i915_sampler_view_destroy(struct pipe_context *pipe,
 812                           struct pipe_sampler_view *view)
 813 {
 814    pipe_resource_reference(&view->texture, NULL);
 815    FREE(view);
 816 }
 817
 818
 819 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 820                                        const struct pipe_framebuffer_state *fb)
 821 {
 822    struct i915_context *i915 = i915_context(pipe);
 823    int i;
 824
 825    i915->framebuffer.width = fb->width;
 826    i915->framebuffer.height = fb->height;
 827    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 828    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 829       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 830                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 831    }
 832    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 833
 834    i915->dirty |= I915_NEW_FRAMEBUFFER;
 835 }
 836
 837
 838
 839 static void i915_set_clip_state( struct pipe_context *pipe,
 840                              const struct pipe_clip_state *clip )
 841 {
 842    struct i915_context *i915 = i915_context(pipe);
 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    if (i915->rasterizer == raster)
 944       return;
 945
 946    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 947
 948    /* pass-through to draw module */
 949    draw_set_rasterizer_state(i915->draw,
 950                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 951                            raster);
 952
 953    i915->dirty |= I915_NEW_RASTERIZER;
 954 }
 955
 956 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 957                                          void *raster)
 958 {
 959    FREE(raster);
 960 }
 961
 962 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 963                                     unsigned count,
 964                                     const struct pipe_vertex_buffer *buffers)
 965 {
 966    struct i915_context *i915 = i915_context(pipe);
 967    struct draw_context *draw = i915->draw;
 968    int i;
 969
 970    util_copy_vertex_buffers(i915->saved_vertex_buffers,
 971                             &i915->saved_nr_vertex_buffers,
 972                             buffers, count);
 973 #if 0
 974    /* XXX doesn't look like this is needed */
 975    /* unmap old */
 976    for (i = 0; i < i915->num_vertex_buffers; i++) {
 977       draw_set_mapped_vertex_buffer(draw, i, NULL);
 978    }
 979 #endif
 980
 981    /* pass-through to draw module */
 982    draw_set_vertex_buffers(draw, count, buffers);
 983
 984    /* map new */
 985    for (i = 0; i < count; i++) {
 986       void *buf = i915_buffer(buffers[i].buffer)->data;
 987       draw_set_mapped_vertex_buffer(draw, i, buf);
 988    }
 989 }
 990
 991 static void *
 992 i915_create_vertex_elements_state(struct pipe_context *pipe,
 993                                   unsigned count,
 994                                   const struct pipe_vertex_element *attribs)
 995 {
 996    struct i915_velems_state *velems;
 997    assert(count <= PIPE_MAX_ATTRIBS);
 998    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 999    if (velems) {
1000       velems->count = count;
1001       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
1002    }
1003    return velems;
1004 }
1005
1006 static void
1007 i915_bind_vertex_elements_state(struct pipe_context *pipe,
1008                                 void *velems)
1009 {
1010    struct i915_context *i915 = i915_context(pipe);
1011    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
1012
1013    if (i915->saved_velems == velems)
1014       return;
1015
1016    i915->saved_velems = velems;
1017
1018    /* pass-through to draw module */
1019    if (i915_velems) {
1020       draw_set_vertex_elements(i915->draw,
1021             i915_velems->count, i915_velems->velem);
1022    }
1023 }
1024
1025 static void
1026 i915_delete_vertex_elements_state(struct pipe_context *pipe, void *velems)
1027 {
1028    FREE( velems );
1029 }
1030
1031 static void i915_set_index_buffer(struct pipe_context *pipe,
1032                                   const struct pipe_index_buffer *ib)
1033 {
1034    struct i915_context *i915 = i915_context(pipe);
1035
1036    if (ib)
1037       memcpy(&i915->index_buffer, ib, sizeof(i915->index_buffer));
1038    else
1039       memset(&i915->index_buffer, 0, sizeof(i915->index_buffer));
1040
1041    /* pass-through to draw module */
1042    draw_set_index_buffer(i915->draw, ib);
1043 }
1044
1045 static void
1046 i915_set_sample_mask(struct pipe_context *pipe,
1047                      unsigned sample_mask)
1048 {
1049 }
1050
1051 void
1052 i915_init_state_functions( struct i915_context *i915 )
1053 {
1054    i915->base.create_blend_state = i915_create_blend_state;
1055    i915->base.bind_blend_state = i915_bind_blend_state;
1056    i915->base.delete_blend_state = i915_delete_blend_state;
1057
1058    i915->base.create_sampler_state = i915_create_sampler_state;
1059    i915->base.bind_fragment_sampler_states = i915_bind_fragment_sampler_states;
1060    i915->base.bind_vertex_sampler_states = i915_bind_vertex_sampler_states;
1061    i915->base.delete_sampler_state = i915_delete_sampler_state;
1062
1063    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1064    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1065    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1066
1067    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1068    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1069    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1070    i915->base.create_fs_state = i915_create_fs_state;
1071    i915->base.bind_fs_state = i915_bind_fs_state;
1072    i915->base.delete_fs_state = i915_delete_fs_state;
1073    i915->base.create_vs_state = i915_create_vs_state;
1074    i915->base.bind_vs_state = i915_bind_vs_state;
1075    i915->base.delete_vs_state = i915_delete_vs_state;
1076    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1077    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1078    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1079
1080    i915->base.set_blend_color = i915_set_blend_color;
1081    i915->base.set_stencil_ref = i915_set_stencil_ref;
1082    i915->base.set_clip_state = i915_set_clip_state;
1083    i915->base.set_sample_mask = i915_set_sample_mask;
1084    i915->base.set_constant_buffer = i915_set_constant_buffer;
1085    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1086
1087    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1088    i915->base.set_scissor_state = i915_set_scissor_state;
1089    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
1090    i915->base.set_vertex_sampler_views = i915_set_vertex_sampler_views;
1091    i915->base.create_sampler_view = i915_create_sampler_view;
1092    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1093    i915->base.set_viewport_state = i915_set_viewport_state;
1094    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1095    i915->base.set_index_buffer = i915_set_index_buffer;
1096    i915->base.redefine_user_buffer = u_default_redefine_user_buffer;
1097 }
1098
1099 void
1100 i915_init_fixup_state_functions( struct i915_context *i915 )
1101 {
1102    i915->saved_bind_fs_state = i915->base.bind_fs_state;
1103    i915->base.bind_fs_state = i915_fixup_bind_fs_state;
1104    i915->saved_bind_sampler_states = i915->base.bind_fragment_sampler_states;
1105    i915->base.bind_fragment_sampler_states = i915_fixup_bind_sampler_states;
1106    i915->saved_set_sampler_views = i915->base.set_fragment_sampler_views;
1107    i915->base.set_fragment_sampler_views = i915_fixup_set_fragment_sampler_views;
1108 }