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_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 <= Elements(i915->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    for (i = 0; i < num_samplers; ++i)
 318       i915->vertex_samplers[i] = samplers[i];
 319    for (i = num_samplers; i < Elements(i915->vertex_samplers); ++i)
 320       i915->vertex_samplers[i] = NULL;
 321
 322    i915->num_vertex_samplers = num_samplers;
 323
 324    draw_set_samplers(i915->draw,
 325                      PIPE_SHADER_VERTEX,
 326                      i915->vertex_samplers,
 327                      i915->num_vertex_samplers);
 328 }
 329
 330
 331
 332 static void i915_bind_fragment_sampler_states(struct pipe_context *pipe,
 333                                      unsigned num, void **sampler)
 334 {
 335    struct i915_context *i915 = i915_context(pipe);
 336    unsigned i;
 337
 338    /* Check for no-op */
 339    if (num == i915->num_samplers &&
 340        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 341       return;
 342
 343    for (i = 0; i < num; ++i)
 344       i915->sampler[i] = sampler[i];
 345    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 346       i915->sampler[i] = NULL;
 347
 348    i915->num_samplers = num;
 349
 350    i915->dirty |= I915_NEW_SAMPLER;
 351 }
 352
 353 static void i915_delete_sampler_state(struct pipe_context *pipe,
 354                                       void *sampler)
 355 {
 356    FREE(sampler);
 357 }
 358
 359
 360 /**
 361  * Called before drawing VBO to map vertex samplers and hand them to draw
 362  */
 363 void
 364 i915_prepare_vertex_sampling(struct i915_context *i915)
 365 {
 366    struct i915_winsys *iws = i915->iws;
 367    unsigned i,j;
 368    uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
 369    uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
 370    const void* data[PIPE_MAX_TEXTURE_LEVELS];
 371    unsigned num = i915->num_vertex_sampler_views;
 372    struct pipe_sampler_view **views = i915->vertex_sampler_views;
 373
 374    assert(num <= PIPE_MAX_SAMPLERS);
 375    if (!num)
 376       return;
 377
 378    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 379       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 380
 381       if (view) {
 382          struct pipe_resource *tex = view->texture;
 383          struct i915_texture *i915_tex = i915_texture(tex);
 384          ubyte *addr;
 385
 386          /* We're referencing the texture's internal data, so save a
 387           * reference to it.
 388           */
 389          pipe_resource_reference(&i915->mapped_vs_tex[i], tex);
 390
 391          i915->mapped_vs_tex_buffer[i] = i915_tex->buffer;
 392          addr = iws->buffer_map(iws,
 393                                 i915_tex->buffer,
 394                                 FALSE /* read only */);
 395
 396          /* Setup array of mipmap level pointers */
 397          /* FIXME: handle 3D textures? */
 398          for (j = view->u.tex.first_level; j <= tex->last_level; j++) {
 399             unsigned offset = i915_texture_offset(i915_tex, j , 0 /* FIXME depth */);
 400             data[j] = addr + offset;
 401             row_stride[j] = i915_tex->stride;
 402             img_stride[j] = 0; /* FIXME */;
 403          }
 404
 405          draw_set_mapped_texture(i915->draw,
 406                                  PIPE_SHADER_VERTEX,
 407                                  i,
 408                                  tex->width0, tex->height0, tex->depth0,
 409                                  view->u.tex.first_level, tex->last_level,
 410                                  row_stride, img_stride, data);
 411       } else
 412          i915->mapped_vs_tex[i] = NULL;
 413    }
 414 }
 415
 416 void
 417 i915_cleanup_vertex_sampling(struct i915_context *i915)
 418 {
 419    struct i915_winsys *iws = i915->iws;
 420    unsigned i;
 421    for (i = 0; i < Elements(i915->mapped_vs_tex); i++) {
 422       if (i915->mapped_vs_tex_buffer[i]) {
 423          iws->buffer_unmap(iws, i915->mapped_vs_tex_buffer[i]);
 424          pipe_resource_reference(&i915->mapped_vs_tex[i], NULL);
 425       }
 426    }
 427 }
 428
 429
 430
 431 /** XXX move someday?  Or consolidate all these simple state setters
 432  * into one file.
 433  */
 434
 435 static void *
 436 i915_create_depth_stencil_state(struct pipe_context *pipe,
 437                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 438 {
 439    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 440
 441    {
 442       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 443       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 444
 445       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 446                               ENABLE_STENCIL_TEST_MASK |
 447                               STENCIL_TEST_MASK(testmask) |
 448                               ENABLE_STENCIL_WRITE_MASK |
 449                               STENCIL_WRITE_MASK(writemask));
 450    }
 451
 452    if (depth_stencil->stencil[0].enabled) {
 453       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 454       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 455       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 456       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 457
 458       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 459                             S5_STENCIL_WRITE_ENABLE |
 460                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 461                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 462                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 463                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 464    }
 465
 466    if (depth_stencil->stencil[1].enabled) {
 467       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 468       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 469       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 470       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 471       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 472       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 473
 474       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 475                      BFO_ENABLE_STENCIL_FUNCS |
 476                      BFO_ENABLE_STENCIL_TWO_SIDE |
 477                      BFO_ENABLE_STENCIL_REF |
 478                      BFO_STENCIL_TWO_SIDE |
 479                      (test << BFO_STENCIL_TEST_SHIFT) |
 480                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 481                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 482                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 483
 484       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 485                      BFM_ENABLE_STENCIL_TEST_MASK |
 486                      BFM_ENABLE_STENCIL_WRITE_MASK |
 487                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 488                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 489    }
 490    else {
 491       /* This actually disables two-side stencil: The bit set is a
 492        * modify-enable bit to indicate we are changing the two-side
 493        * setting.  Then there is a symbolic zero to show that we are
 494        * setting the flag to zero/off.
 495        */
 496       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 497                      BFO_ENABLE_STENCIL_TWO_SIDE |
 498                      0);
 499       cso->bfo[1] = 0;
 500    }
 501
 502    if (depth_stencil->depth.enabled) {
 503       int func = i915_translate_compare_func(depth_stencil->depth.func);
 504
 505       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 506                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 507
 508       if (depth_stencil->depth.writemask)
 509          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 510    }
 511
 512    if (depth_stencil->alpha.enabled) {
 513       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 514       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 515
 516       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 517                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 518                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 519    }
 520
 521    return cso;
 522 }
 523
 524 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 525                                           void *depth_stencil)
 526 {
 527    struct i915_context *i915 = i915_context(pipe);
 528
 529    if (i915->depth_stencil == depth_stencil)
 530       return;
 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
 549    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 550    i915->dirty |= I915_NEW_SCISSOR;
 551 }
 552
 553
 554 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 555                                    const struct pipe_poly_stipple *stipple )
 556 {
 557 }
 558
 559
 560
 561 static void *
 562 i915_create_fs_state(struct pipe_context *pipe,
 563                      const struct pipe_shader_state *templ)
 564 {
 565    struct i915_context *i915 = i915_context(pipe);
 566    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 567    if (!ifs)
 568       return NULL;
 569
 570    ifs->draw_data = draw_create_fragment_shader(i915->draw, templ);
 571    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 572
 573    tgsi_scan_shader(templ->tokens, &ifs->info);
 574
 575    /* The shader's compiled to i915 instructions here */
 576    i915_translate_fragment_program(i915, ifs);
 577
 578    return ifs;
 579 }
 580
 581 static void
 582 i915_fixup_bind_fs_state(struct pipe_context *pipe, void *shader)
 583 {
 584    struct i915_context *i915 = i915_context(pipe);
 585
 586    i915->saved_bind_fs_state(pipe, shader);
 587 }
 588
 589 static void
 590 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 591 {
 592    struct i915_context *i915 = i915_context(pipe);
 593
 594    if (i915->fs == shader)
 595       return;
 596
 597    i915->fs = (struct i915_fragment_shader*) shader;
 598
 599    draw_bind_fragment_shader(i915->draw,  (i915->fs ? i915->fs->draw_data : NULL));
 600
 601    i915->dirty |= I915_NEW_FS;
 602 }
 603
 604 static
 605 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 606 {
 607    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 608
 609    FREE(ifs->decl);
 610    ifs->decl = NULL;
 611
 612    if (ifs->program) {
 613       FREE(ifs->program);
 614       ifs->program = NULL;
 615       FREE((struct tgsi_token *)ifs->state.tokens);
 616       ifs->state.tokens = NULL;
 617    }
 618
 619    ifs->program_len = 0;
 620    ifs->decl_len = 0;
 621
 622    FREE(ifs);
 623 }
 624
 625
 626 static void *
 627 i915_create_vs_state(struct pipe_context *pipe,
 628                      const struct pipe_shader_state *templ)
 629 {
 630    struct i915_context *i915 = i915_context(pipe);
 631
 632    /* just pass-through to draw module */
 633    return draw_create_vertex_shader(i915->draw, templ);
 634 }
 635
 636 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 637 {
 638    struct i915_context *i915 = i915_context(pipe);
 639
 640    if (i915->vs == shader)
 641       return;
 642
 643    i915->vs = shader;
 644
 645    /* just pass-through to draw module */
 646    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 647
 648    i915->dirty |= I915_NEW_VS;
 649 }
 650
 651 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 652 {
 653    struct i915_context *i915 = i915_context(pipe);
 654
 655    /* just pass-through to draw module */
 656    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 657 }
 658
 659 static void i915_set_constant_buffer(struct pipe_context *pipe,
 660                                      uint shader, uint index,
 661                                      struct pipe_constant_buffer *cb)
 662 {
 663    struct i915_context *i915 = i915_context(pipe);
 664    struct pipe_resource *buf = cb ? cb->buffer : NULL;
 665    unsigned new_num = 0;
 666    boolean diff = TRUE;
 667
 668    /* XXX don't support geom shaders now */
 669    if (shader == PIPE_SHADER_GEOMETRY)
 670       return;
 671
 672    if (cb && cb->user_buffer) {
 673       buf = i915_user_buffer_create(pipe->screen, (void *) cb->user_buffer,
 674                                     cb->buffer_size,
 675                                     PIPE_BIND_CONSTANT_BUFFER);
 676    }
 677
 678    /* if we have a new buffer compare it with the old one */
 679    if (buf) {
 680       struct i915_buffer *ibuf = i915_buffer(buf);
 681       struct pipe_resource *old_buf = i915->constants[shader];
 682       struct i915_buffer *old = old_buf ? i915_buffer(old_buf) : NULL;
 683       unsigned old_num = i915->current.num_user_constants[shader];
 684
 685       new_num = ibuf->b.b.width0 / 4 * sizeof(float);
 686
 687       if (old_num == new_num) {
 688          if (old_num == 0)
 689             diff = FALSE;
 690 #if 0
 691          /* XXX no point in running this code since st/mesa only uses user buffers */
 692          /* Can't compare the buffer data since they are userbuffers */
 693          else if (old && old->free_on_destroy)
 694             diff = memcmp(old->data, ibuf->data, ibuf->b.b.width0);
 695 #else
 696          (void)old;
 697 #endif
 698       }
 699    } else {
 700       diff = i915->current.num_user_constants[shader] != 0;
 701    }
 702
 703    pipe_resource_reference(&i915->constants[shader], buf);
 704    i915->current.num_user_constants[shader] = new_num;
 705
 706    if (diff)
 707       i915->dirty |= shader == PIPE_SHADER_VERTEX ? I915_NEW_VS_CONSTANTS : I915_NEW_FS_CONSTANTS;
 708
 709    if (cb && cb->user_buffer) {
 710       pipe_resource_reference(&buf, NULL);
 711    }
 712 }
 713
 714
 715 static void
 716 i915_fixup_set_fragment_sampler_views(struct pipe_context *pipe,
 717                                       unsigned num,
 718                                       struct pipe_sampler_view **views)
 719 {
 720    struct i915_context *i915 = i915_context(pipe);
 721
 722    i915->saved_set_sampler_views(pipe, num, views);
 723 }
 724
 725 static void i915_set_fragment_sampler_views(struct pipe_context *pipe,
 726                                             unsigned num,
 727                                             struct pipe_sampler_view **views)
 728 {
 729    struct i915_context *i915 = i915_context(pipe);
 730    uint i;
 731
 732    assert(num <= PIPE_MAX_SAMPLERS);
 733
 734    /* Check for no-op */
 735    if (num == i915->num_fragment_sampler_views &&
 736        !memcmp(i915->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
 737       return;
 738
 739    for (i = 0; i < num; i++)
 740       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 741                                   views[i]);
 742
 743    for (i = num; i < i915->num_fragment_sampler_views; i++)
 744       pipe_sampler_view_reference(&i915->fragment_sampler_views[i],
 745                                   NULL);
 746
 747    i915->num_fragment_sampler_views = num;
 748
 749    i915->dirty |= I915_NEW_SAMPLER_VIEW;
 750 }
 751
 752 static void
 753 i915_set_vertex_sampler_views(struct pipe_context *pipe,
 754                               unsigned num,
 755                               struct pipe_sampler_view **views)
 756 {
 757    struct i915_context *i915 = i915_context(pipe);
 758    uint i;
 759
 760    assert(num <= Elements(i915->vertex_sampler_views));
 761
 762    /* Check for no-op */
 763    if (num == i915->num_vertex_sampler_views &&
 764        !memcmp(i915->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
 765       return;
 766    }
 767
 768    for (i = 0; i < Elements(i915->vertex_sampler_views); i++) {
 769       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 770
 771       pipe_sampler_view_reference(&i915->vertex_sampler_views[i], view);
 772    }
 773
 774    i915->num_vertex_sampler_views = num;
 775
 776    draw_set_sampler_views(i915->draw,
 777                           PIPE_SHADER_VERTEX,
 778                           i915->vertex_sampler_views,
 779                           i915->num_vertex_sampler_views);
 780 }
 781
 782
 783 static struct pipe_sampler_view *
 784 i915_create_sampler_view(struct pipe_context *pipe,
 785                          struct pipe_resource *texture,
 786                          const struct pipe_sampler_view *templ)
 787 {
 788    struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
 789
 790    if (view) {
 791       *view = *templ;
 792       view->reference.count = 1;
 793       view->texture = NULL;
 794       pipe_resource_reference(&view->texture, texture);
 795       view->context = pipe;
 796    }
 797
 798    return view;
 799 }
 800
 801
 802 static void
 803 i915_sampler_view_destroy(struct pipe_context *pipe,
 804                           struct pipe_sampler_view *view)
 805 {
 806    pipe_resource_reference(&view->texture, NULL);
 807    FREE(view);
 808 }
 809
 810
 811 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 812                                        const struct pipe_framebuffer_state *fb)
 813 {
 814    struct i915_context *i915 = i915_context(pipe);
 815    int i;
 816
 817    i915->framebuffer.width = fb->width;
 818    i915->framebuffer.height = fb->height;
 819    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 820    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 821       pipe_surface_reference(&i915->framebuffer.cbufs[i],
 822                              i < fb->nr_cbufs ? fb->cbufs[i] : NULL);
 823    }
 824    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 825
 826    i915->dirty |= I915_NEW_FRAMEBUFFER | I915_NEW_FS;
 827 }
 828
 829
 830
 831 static void i915_set_clip_state( struct pipe_context *pipe,
 832                              const struct pipe_clip_state *clip )
 833 {
 834    struct i915_context *i915 = i915_context(pipe);
 835
 836    i915->clip = *clip;
 837
 838    draw_set_clip_state(i915->draw, clip);
 839
 840    i915->dirty |= I915_NEW_CLIP;
 841 }
 842
 843
 844
 845 /* Called when driver state tracker notices changes to the viewport
 846  * matrix:
 847  */
 848 static void i915_set_viewport_state( struct pipe_context *pipe,
 849                                      const struct pipe_viewport_state *viewport )
 850 {
 851    struct i915_context *i915 = i915_context(pipe);
 852
 853    i915->viewport = *viewport; /* struct copy */
 854
 855    /* pass the viewport info to the draw module */
 856    draw_set_viewport_state(i915->draw, &i915->viewport);
 857
 858    i915->dirty |= I915_NEW_VIEWPORT;
 859 }
 860
 861
 862 static void *
 863 i915_create_rasterizer_state(struct pipe_context *pipe,
 864                              const struct pipe_rasterizer_state *rasterizer)
 865 {
 866    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 867
 868    cso->templ = *rasterizer;
 869    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 870    cso->light_twoside = rasterizer->light_twoside;
 871    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 872    cso->ds[1].f = rasterizer->offset_scale;
 873    if (rasterizer->poly_stipple_enable) {
 874       cso->st |= ST1_ENABLE;
 875    }
 876
 877    if (rasterizer->scissor)
 878       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 879    else
 880       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 881
 882    switch (rasterizer->cull_face) {
 883    case PIPE_FACE_NONE:
 884       cso->LIS4 |= S4_CULLMODE_NONE;
 885       break;
 886    case PIPE_FACE_FRONT:
 887       if (rasterizer->front_ccw)
 888          cso->LIS4 |= S4_CULLMODE_CCW;
 889       else
 890          cso->LIS4 |= S4_CULLMODE_CW;
 891       break;
 892    case PIPE_FACE_BACK:
 893       if (rasterizer->front_ccw)
 894          cso->LIS4 |= S4_CULLMODE_CW;
 895       else
 896          cso->LIS4 |= S4_CULLMODE_CCW;
 897       break;
 898    case PIPE_FACE_FRONT_AND_BACK:
 899       cso->LIS4 |= S4_CULLMODE_BOTH;
 900       break;
 901    }
 902
 903    {
 904       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 905
 906       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 907
 908       if (rasterizer->line_smooth)
 909          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 910    }
 911
 912    {
 913       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 914
 915       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 916    }
 917
 918    if (rasterizer->flatshade) {
 919       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 920                     S4_FLATSHADE_COLOR |
 921                     S4_FLATSHADE_SPECULAR);
 922    }
 923
 924    cso->LIS7 = fui( rasterizer->offset_units );
 925
 926
 927    return cso;
 928 }
 929
 930 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 931                                         void *raster )
 932 {
 933    struct i915_context *i915 = i915_context(pipe);
 934
 935    if (i915->rasterizer == raster)
 936       return;
 937
 938    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 939
 940    /* pass-through to draw module */
 941    draw_set_rasterizer_state(i915->draw,
 942                            (i915->rasterizer ? &(i915->rasterizer->templ) : NULL),
 943                            raster);
 944
 945    i915->dirty |= I915_NEW_RASTERIZER;
 946 }
 947
 948 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 949                                          void *raster)
 950 {
 951    FREE(raster);
 952 }
 953
 954 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 955                                     unsigned count,
 956                                     const struct pipe_vertex_buffer *buffers)
 957 {
 958    struct i915_context *i915 = i915_context(pipe);
 959    struct draw_context *draw = i915->draw;
 960    int i;
 961
 962    util_copy_vertex_buffers(i915->vertex_buffers,
 963                             &i915->nr_vertex_buffers,
 964                             buffers, count);
 965 #if 0
 966    /* XXX doesn't look like this is needed */
 967    /* unmap old */
 968    for (i = 0; i < i915->num_vertex_buffers; i++) {
 969       draw_set_mapped_vertex_buffer(draw, i, NULL);
 970    }
 971 #endif
 972
 973    /* pass-through to draw module */
 974    draw_set_vertex_buffers(draw, count, buffers);
 975
 976    /* map new */
 977    for (i = 0; i < count; i++) {
 978       const void *buf = buffers[i].user_buffer;
 979       if (!buf)
 980             buf = i915_buffer(buffers[i].buffer)->data;
 981       draw_set_mapped_vertex_buffer(draw, i, buf);
 982    }
 983 }
 984
 985 static void *
 986 i915_create_vertex_elements_state(struct pipe_context *pipe,
 987                                   unsigned count,
 988                                   const struct pipe_vertex_element *attribs)
 989 {
 990    struct i915_velems_state *velems;
 991    assert(count <= PIPE_MAX_ATTRIBS);
 992    velems = (struct i915_velems_state *) MALLOC(sizeof(struct i915_velems_state));
 993    if (velems) {
 994       velems->count = count;
 995       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
 996    }
 997    return velems;
 998 }
 999
1000 static void
1001 i915_bind_vertex_elements_state(struct pipe_context *pipe,
1002                                 void *velems)
1003 {
1004    struct i915_context *i915 = i915_context(pipe);
1005    struct i915_velems_state *i915_velems = (struct i915_velems_state *) velems;
1006
1007    if (i915->velems == velems)
1008       return;
1009
1010    i915->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
1036 static void
1037 i915_set_sample_mask(struct pipe_context *pipe,
1038                      unsigned sample_mask)
1039 {
1040 }
1041
1042 void
1043 i915_init_state_functions( struct i915_context *i915 )
1044 {
1045    i915->base.create_blend_state = i915_create_blend_state;
1046    i915->base.bind_blend_state = i915_bind_blend_state;
1047    i915->base.delete_blend_state = i915_delete_blend_state;
1048
1049    i915->base.create_sampler_state = i915_create_sampler_state;
1050    i915->base.bind_fragment_sampler_states = i915_bind_fragment_sampler_states;
1051    i915->base.bind_vertex_sampler_states = i915_bind_vertex_sampler_states;
1052    i915->base.delete_sampler_state = i915_delete_sampler_state;
1053
1054    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
1055    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
1056    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
1057
1058    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
1059    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
1060    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
1061    i915->base.create_fs_state = i915_create_fs_state;
1062    i915->base.bind_fs_state = i915_bind_fs_state;
1063    i915->base.delete_fs_state = i915_delete_fs_state;
1064    i915->base.create_vs_state = i915_create_vs_state;
1065    i915->base.bind_vs_state = i915_bind_vs_state;
1066    i915->base.delete_vs_state = i915_delete_vs_state;
1067    i915->base.create_vertex_elements_state = i915_create_vertex_elements_state;
1068    i915->base.bind_vertex_elements_state = i915_bind_vertex_elements_state;
1069    i915->base.delete_vertex_elements_state = i915_delete_vertex_elements_state;
1070
1071    i915->base.set_blend_color = i915_set_blend_color;
1072    i915->base.set_stencil_ref = i915_set_stencil_ref;
1073    i915->base.set_clip_state = i915_set_clip_state;
1074    i915->base.set_sample_mask = i915_set_sample_mask;
1075    i915->base.set_constant_buffer = i915_set_constant_buffer;
1076    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
1077
1078    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
1079    i915->base.set_scissor_state = i915_set_scissor_state;
1080    i915->base.set_fragment_sampler_views = i915_set_fragment_sampler_views;
1081    i915->base.set_vertex_sampler_views = i915_set_vertex_sampler_views;
1082    i915->base.create_sampler_view = i915_create_sampler_view;
1083    i915->base.sampler_view_destroy = i915_sampler_view_destroy;
1084    i915->base.set_viewport_state = i915_set_viewport_state;
1085    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
1086    i915->base.set_index_buffer = i915_set_index_buffer;
1087 }
1088
1089 void
1090 i915_init_fixup_state_functions( struct i915_context *i915 )
1091 {
1092    i915->saved_bind_fs_state = i915->base.bind_fs_state;
1093    i915->base.bind_fs_state = i915_fixup_bind_fs_state;
1094    i915->saved_bind_sampler_states = i915->base.bind_fragment_sampler_states;
1095    i915->base.bind_fragment_sampler_states = i915_fixup_bind_sampler_states;
1096    i915->saved_set_sampler_views = i915->base.set_fragment_sampler_views;
1097    i915->base.set_fragment_sampler_views = i915_fixup_set_fragment_sampler_views;
1098 }