src/gallium/drivers/i915simple/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 "pipe/p_winsys.h"
  34 #include "pipe/p_util.h"
  35 #include "pipe/p_inlines.h"
  36
  37 #include "i915_context.h"
  38 #include "i915_reg.h"
  39 #include "i915_state.h"
  40 #include "i915_state_inlines.h"
  41 #include "i915_fpc.h"
  42
  43
  44 /* The i915 (and related graphics cores) do not support GL_CLAMP.  The
  45  * Intel drivers for "other operating systems" implement GL_CLAMP as
  46  * GL_CLAMP_TO_EDGE, so the same is done here.
  47  */
  48 static unsigned
  49 translate_wrap_mode(unsigned wrap)
  50 {
  51    switch (wrap) {
  52    case PIPE_TEX_WRAP_REPEAT:
  53       return TEXCOORDMODE_WRAP;
  54    case PIPE_TEX_WRAP_CLAMP:
  55       return TEXCOORDMODE_CLAMP_EDGE;   /* not quite correct */
  56    case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
  57       return TEXCOORDMODE_CLAMP_EDGE;
  58    case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
  59       return TEXCOORDMODE_CLAMP_BORDER;
  60 //   case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  61 //      return TEXCOORDMODE_MIRROR;
  62    default:
  63       return TEXCOORDMODE_WRAP;
  64    }
  65 }
  66
  67 static unsigned translate_img_filter( unsigned filter )
  68 {
  69    switch (filter) {
  70    case PIPE_TEX_FILTER_NEAREST:
  71       return FILTER_NEAREST;
  72    case PIPE_TEX_FILTER_LINEAR:
  73       return FILTER_LINEAR;
  74    case PIPE_TEX_FILTER_ANISO:
  75       return FILTER_ANISOTROPIC;
  76    default:
  77       assert(0);
  78       return FILTER_NEAREST;
  79    }
  80 }
  81
  82 static unsigned translate_mip_filter( unsigned filter )
  83 {
  84    switch (filter) {
  85    case PIPE_TEX_MIPFILTER_NONE:
  86       return MIPFILTER_NONE;
  87    case PIPE_TEX_MIPFILTER_NEAREST:
  88       return MIPFILTER_NEAREST;
  89    case PIPE_TEX_MIPFILTER_LINEAR:
  90       return MIPFILTER_LINEAR;
  91    default:
  92       assert(0);
  93       return MIPFILTER_NONE;
  94    }
  95 }
  96
  97
  98 /* None of this state is actually used for anything yet.
  99  */
 100 static void *
 101 i915_create_blend_state(struct pipe_context *pipe,
 102                         const struct pipe_blend_state *blend)
 103 {
 104    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 105
 106    {
 107       unsigned eqRGB  = blend->rgb_func;
 108       unsigned srcRGB = blend->rgb_src_factor;
 109       unsigned dstRGB = blend->rgb_dst_factor;
 110
 111       unsigned eqA    = blend->alpha_func;
 112       unsigned srcA   = blend->alpha_src_factor;
 113       unsigned dstA   = blend->alpha_dst_factor;
 114
 115       /* Special handling for MIN/MAX filter modes handled at
 116        * state_tracker level.
 117        */
 118
 119       if (srcA != srcRGB ||
 120           dstA != dstRGB ||
 121           eqA != eqRGB) {
 122
 123          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 124                           IAB_MODIFY_ENABLE |
 125                           IAB_ENABLE |
 126                           IAB_MODIFY_FUNC |
 127                           IAB_MODIFY_SRC_FACTOR |
 128                           IAB_MODIFY_DST_FACTOR |
 129                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 130                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 131                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 132       }
 133       else {
 134          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 135                           IAB_MODIFY_ENABLE |
 136                           0);
 137       }
 138    }
 139
 140    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 141                         ENABLE_LOGIC_OP_FUNC |
 142                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 143
 144    if (blend->logicop_enable)
 145       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 146
 147    if (blend->dither)
 148       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 149
 150    if ((blend->colormask & PIPE_MASK_R) == 0)
 151       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 152
 153    if ((blend->colormask & PIPE_MASK_G) == 0)
 154       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 155
 156    if ((blend->colormask & PIPE_MASK_B) == 0)
 157       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 158
 159    if ((blend->colormask & PIPE_MASK_A) == 0)
 160       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 161
 162    if (blend->blend_enable) {
 163       unsigned funcRGB = blend->rgb_func;
 164       unsigned srcRGB  = blend->rgb_src_factor;
 165       unsigned dstRGB  = blend->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    i915->blend = (struct i915_blend_state*)blend;
 182
 183    i915->dirty |= I915_NEW_BLEND;
 184 }
 185
 186
 187 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 188 {
 189    FREE(blend);
 190 }
 191
 192 static void i915_set_blend_color( struct pipe_context *pipe,
 193                              const struct pipe_blend_color *blend_color )
 194 {
 195    struct i915_context *i915 = i915_context(pipe);
 196
 197    i915->blend_color = *blend_color;
 198
 199    i915->dirty |= I915_NEW_BLEND;
 200 }
 201
 202 static void *
 203 i915_create_sampler_state(struct pipe_context *pipe,
 204                           const struct pipe_sampler_state *sampler)
 205 {
 206    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 207    const unsigned ws = sampler->wrap_s;
 208    const unsigned wt = sampler->wrap_t;
 209    const unsigned wr = sampler->wrap_r;
 210    unsigned minFilt, magFilt;
 211    unsigned mipFilt;
 212
 213    cso->templ = sampler;
 214
 215    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 216    minFilt = translate_img_filter( sampler->min_img_filter );
 217    magFilt = translate_img_filter( sampler->mag_img_filter );
 218
 219    if (sampler->max_anisotropy > 2.0) {
 220       cso->state[0] |= SS2_MAX_ANISO_4;
 221    }
 222
 223    {
 224       int b = (int) (sampler->lod_bias * 16.0);
 225       b = CLAMP(b, -256, 255);
 226       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 227    }
 228
 229    /* Shadow:
 230     */
 231    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 232    {
 233       cso->state[0] |= (SS2_SHADOW_ENABLE |
 234                         i915_translate_compare_func(sampler->compare_func));
 235
 236       minFilt = FILTER_4X4_FLAT;
 237       magFilt = FILTER_4X4_FLAT;
 238    }
 239
 240    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 241                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 242                      (magFilt << SS2_MAG_FILTER_SHIFT));
 243
 244    cso->state[1] |=
 245       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 246        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 247        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 248
 249    if (sampler->normalized_coords)
 250       cso->state[1] |= SS3_NORMALIZED_COORDS;
 251
 252    if (0) /* XXX not tested yet */
 253    {
 254       int minlod = (int) (16.0 * sampler->min_lod);
 255       minlod = CLAMP(minlod, 0, 16 * 11);
 256       cso->state[1] |= (minlod << SS3_MIN_LOD_SHIFT);
 257    }
 258
 259    {
 260       ubyte r = float_to_ubyte(sampler->border_color[0]);
 261       ubyte g = float_to_ubyte(sampler->border_color[1]);
 262       ubyte b = float_to_ubyte(sampler->border_color[2]);
 263       ubyte a = float_to_ubyte(sampler->border_color[3]);
 264       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 265    }
 266    return cso;
 267 }
 268
 269 static void i915_bind_sampler_states(struct pipe_context *pipe,
 270                                      unsigned num, void **sampler)
 271 {
 272    struct i915_context *i915 = i915_context(pipe);
 273    unsigned i;
 274
 275    assert(num <= PIPE_MAX_SAMPLERS);
 276
 277    /* Check for no-op */
 278    if (num == i915->num_samplers &&
 279        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 280       return;
 281
 282    for (i = 0; i < num; ++i)
 283       i915->sampler[i] = sampler[i];
 284    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 285       i915->sampler[i] = NULL;
 286
 287    i915->num_samplers = num;
 288
 289    i915->dirty |= I915_NEW_SAMPLER;
 290 }
 291
 292 static void i915_delete_sampler_state(struct pipe_context *pipe,
 293                                       void *sampler)
 294 {
 295    FREE(sampler);
 296 }
 297
 298
 299 /** XXX move someday?  Or consolidate all these simple state setters
 300  * into one file.
 301  */
 302
 303 static void *
 304 i915_create_depth_stencil_state(struct pipe_context *pipe,
 305                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 306 {
 307    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 308
 309    {
 310       int testmask = depth_stencil->stencil[0].value_mask & 0xff;
 311       int writemask = depth_stencil->stencil[0].write_mask & 0xff;
 312
 313       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 314                               ENABLE_STENCIL_TEST_MASK |
 315                               STENCIL_TEST_MASK(testmask) |
 316                               ENABLE_STENCIL_WRITE_MASK |
 317                               STENCIL_WRITE_MASK(writemask));
 318    }
 319
 320    if (depth_stencil->stencil[0].enabled) {
 321       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 322       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 323       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 324       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 325       int ref  = depth_stencil->stencil[0].ref_value & 0xff;
 326
 327       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 328                             S5_STENCIL_WRITE_ENABLE |
 329                             (ref  << S5_STENCIL_REF_SHIFT) |
 330                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 331                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 332                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 333                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 334    }
 335
 336    if (depth_stencil->stencil[1].enabled) {
 337       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 338       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 339       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 340       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 341       int ref   = depth_stencil->stencil[1].ref_value & 0xff;
 342       int tmask = depth_stencil->stencil[1].value_mask & 0xff;
 343       int wmask = depth_stencil->stencil[1].write_mask & 0xff;
 344
 345       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 346                      BFO_ENABLE_STENCIL_FUNCS |
 347                      BFO_ENABLE_STENCIL_TWO_SIDE |
 348                      BFO_ENABLE_STENCIL_REF |
 349                      BFO_STENCIL_TWO_SIDE |
 350                      (ref  << BFO_STENCIL_REF_SHIFT) |
 351                      (test << BFO_STENCIL_TEST_SHIFT) |
 352                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 353                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 354                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 355
 356       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 357                      BFM_ENABLE_STENCIL_TEST_MASK |
 358                      BFM_ENABLE_STENCIL_WRITE_MASK |
 359                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 360                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 361    }
 362    else {
 363       /* This actually disables two-side stencil: The bit set is a
 364        * modify-enable bit to indicate we are changing the two-side
 365        * setting.  Then there is a symbolic zero to show that we are
 366        * setting the flag to zero/off.
 367        */
 368       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 369                      BFO_ENABLE_STENCIL_TWO_SIDE |
 370                      0);
 371       cso->bfo[1] = 0;
 372    }
 373
 374    if (depth_stencil->depth.enabled) {
 375       int func = i915_translate_compare_func(depth_stencil->depth.func);
 376
 377       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 378                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 379
 380       if (depth_stencil->depth.writemask)
 381          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 382    }
 383
 384    if (depth_stencil->alpha.enabled) {
 385       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 386       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref);
 387
 388       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 389                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 390                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 391    }
 392
 393    return cso;
 394 }
 395
 396 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 397                                           void *depth_stencil)
 398 {
 399    struct i915_context *i915 = i915_context(pipe);
 400
 401    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 402
 403    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 404 }
 405
 406 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 407                                             void *depth_stencil)
 408 {
 409    FREE(depth_stencil);
 410 }
 411
 412
 413 static void i915_set_scissor_state( struct pipe_context *pipe,
 414                                  const struct pipe_scissor_state *scissor )
 415 {
 416    struct i915_context *i915 = i915_context(pipe);
 417
 418    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 419    i915->dirty |= I915_NEW_SCISSOR;
 420 }
 421
 422
 423 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 424                                    const struct pipe_poly_stipple *stipple )
 425 {
 426 }
 427
 428
 429
 430 static void *
 431 i915_create_fs_state(struct pipe_context *pipe,
 432                      const struct pipe_shader_state *templ)
 433 {
 434    struct i915_context *i915 = i915_context(pipe);
 435    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 436    if (!ifs)
 437       return NULL;
 438
 439    ifs->state = *templ;
 440
 441    tgsi_scan_shader(templ->tokens, &ifs->info);
 442
 443    /* The shader's compiled to i915 instructions here */
 444    i915_translate_fragment_program(i915, ifs);
 445
 446    return ifs;
 447 }
 448
 449 static void
 450 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 451 {
 452    struct i915_context *i915 = i915_context(pipe);
 453
 454    i915->fs = (struct i915_fragment_shader*) shader;
 455
 456    i915->dirty |= I915_NEW_FS;
 457 }
 458
 459 static
 460 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 461 {
 462    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 463
 464    if (ifs->program)
 465       FREE(ifs->program);
 466    ifs->program_len = 0;
 467
 468    FREE(ifs);
 469 }
 470
 471
 472 static void *
 473 i915_create_vs_state(struct pipe_context *pipe,
 474                      const struct pipe_shader_state *templ)
 475 {
 476    struct i915_context *i915 = i915_context(pipe);
 477
 478    /* just pass-through to draw module */
 479    return draw_create_vertex_shader(i915->draw, templ);
 480 }
 481
 482 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 483 {
 484    struct i915_context *i915 = i915_context(pipe);
 485
 486    /* just pass-through to draw module */
 487    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 488
 489    i915->dirty |= I915_NEW_VS;
 490 }
 491
 492 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 493 {
 494    struct i915_context *i915 = i915_context(pipe);
 495
 496    /* just pass-through to draw module */
 497    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 498 }
 499
 500 static void i915_set_constant_buffer(struct pipe_context *pipe,
 501                                      uint shader, uint index,
 502                                      const struct pipe_constant_buffer *buf)
 503 {
 504    struct i915_context *i915 = i915_context(pipe);
 505    struct pipe_winsys *ws = pipe->winsys;
 506
 507    assert(shader < PIPE_SHADER_TYPES);
 508    assert(index == 0);
 509
 510    /* Make a copy of shader constants.
 511     * During fragment program translation we may add additional
 512     * constants to the array.
 513     *
 514     * We want to consider the situation where some user constants
 515     * (ex: a material color) may change frequently but the shader program
 516     * stays the same.  In that case we should only be updating the first
 517     * N constants, leaving any extras from shader translation alone.
 518     */
 519    if (buf) {
 520       void *mapped;
 521       if (buf->size &&
 522           (mapped = ws->buffer_map(ws, buf->buffer,
 523                                    PIPE_BUFFER_USAGE_CPU_READ))) {
 524          memcpy(i915->current.constants[shader], mapped, buf->size);
 525          ws->buffer_unmap(ws, buf->buffer);
 526          i915->current.num_user_constants[shader]
 527             = buf->size / (4 * sizeof(float));
 528       }
 529       else {
 530          i915->current.num_user_constants[shader] = 0;
 531       }
 532    }
 533
 534    i915->dirty |= I915_NEW_CONSTANTS;
 535 }
 536
 537
 538 static void i915_set_sampler_textures(struct pipe_context *pipe,
 539                                       unsigned num,
 540                                       struct pipe_texture **texture)
 541 {
 542    struct i915_context *i915 = i915_context(pipe);
 543    uint i;
 544
 545    assert(num <= PIPE_MAX_SAMPLERS);
 546
 547    /* Check for no-op */
 548    if (num == i915->num_textures &&
 549        !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
 550       return;
 551
 552    /* Fixes wrong texture in texobj with VBUF */
 553    draw_flush(i915->draw);
 554
 555    for (i = 0; i < num; i++)
 556       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 557                              texture[i]);
 558
 559    for (i = num; i < i915->num_textures; i++)
 560       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 561                              NULL);
 562
 563    i915->num_textures = num;
 564
 565    i915->dirty |= I915_NEW_TEXTURE;
 566 }
 567
 568
 569
 570 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 571                                        const struct pipe_framebuffer_state *fb)
 572 {
 573    struct i915_context *i915 = i915_context(pipe);
 574
 575    i915->framebuffer = *fb; /* struct copy */
 576
 577    i915->dirty |= I915_NEW_FRAMEBUFFER;
 578 }
 579
 580
 581
 582 static void i915_set_clip_state( struct pipe_context *pipe,
 583                              const struct pipe_clip_state *clip )
 584 {
 585    struct i915_context *i915 = i915_context(pipe);
 586
 587    draw_set_clip_state(i915->draw, clip);
 588
 589    i915->dirty |= I915_NEW_CLIP;
 590 }
 591
 592
 593
 594 /* Called when driver state tracker notices changes to the viewport
 595  * matrix:
 596  */
 597 static void i915_set_viewport_state( struct pipe_context *pipe,
 598                                      const struct pipe_viewport_state *viewport )
 599 {
 600    struct i915_context *i915 = i915_context(pipe);
 601
 602    i915->viewport = *viewport; /* struct copy */
 603
 604    /* pass the viewport info to the draw module */
 605    draw_set_viewport_state(i915->draw, &i915->viewport);
 606
 607    i915->dirty |= I915_NEW_VIEWPORT;
 608 }
 609
 610
 611 static void *
 612 i915_create_rasterizer_state(struct pipe_context *pipe,
 613                              const struct pipe_rasterizer_state *rasterizer)
 614 {
 615    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 616
 617    cso->templ = rasterizer;
 618    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 619    cso->light_twoside = rasterizer->light_twoside;
 620    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 621    cso->ds[1].f = rasterizer->offset_scale;
 622    if (rasterizer->poly_stipple_enable) {
 623       cso->st |= ST1_ENABLE;
 624    }
 625
 626    if (rasterizer->scissor)
 627       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 628    else
 629       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 630
 631    switch (rasterizer->cull_mode) {
 632    case PIPE_WINDING_NONE:
 633       cso->LIS4 |= S4_CULLMODE_NONE;
 634       break;
 635    case PIPE_WINDING_CW:
 636       cso->LIS4 |= S4_CULLMODE_CW;
 637       break;
 638    case PIPE_WINDING_CCW:
 639       cso->LIS4 |= S4_CULLMODE_CCW;
 640       break;
 641    case PIPE_WINDING_BOTH:
 642       cso->LIS4 |= S4_CULLMODE_BOTH;
 643       break;
 644    }
 645
 646    {
 647       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 648
 649       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 650
 651       if (rasterizer->line_smooth)
 652          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 653    }
 654
 655    {
 656       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 657
 658       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 659    }
 660
 661    if (rasterizer->flatshade) {
 662       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 663                     S4_FLATSHADE_COLOR |
 664                     S4_FLATSHADE_SPECULAR);
 665    }
 666
 667    cso->LIS7 = fui( rasterizer->offset_units );
 668
 669
 670    return cso;
 671 }
 672
 673 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 674                                         void *raster )
 675 {
 676    struct i915_context *i915 = i915_context(pipe);
 677
 678    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 679
 680    /* pass-through to draw module */
 681    draw_set_rasterizer_state(i915->draw,
 682                           (i915->rasterizer ? i915->rasterizer->templ : NULL));
 683
 684    i915->dirty |= I915_NEW_RASTERIZER;
 685 }
 686
 687 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 688                                          void *raster)
 689 {
 690    FREE(raster);
 691 }
 692
 693 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 694                                     unsigned count,
 695                                     const struct pipe_vertex_buffer *buffers)
 696 {
 697    struct i915_context *i915 = i915_context(pipe);
 698
 699    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 700    i915->num_vertex_buffers = count;
 701
 702    /* pass-through to draw module */
 703    draw_set_vertex_buffers(i915->draw, count, buffers);
 704 }
 705
 706 static void i915_set_vertex_elements(struct pipe_context *pipe,
 707                                      unsigned count,
 708                                      const struct pipe_vertex_element *elements)
 709 {
 710    struct i915_context *i915 = i915_context(pipe);
 711    i915->num_vertex_elements = count;
 712    /* pass-through to draw module */
 713    draw_set_vertex_elements(i915->draw, count, elements);
 714 }
 715
 716
 717
 718 void
 719 i915_init_state_functions( struct i915_context *i915 )
 720 {
 721    i915->pipe.create_blend_state = i915_create_blend_state;
 722    i915->pipe.bind_blend_state = i915_bind_blend_state;
 723    i915->pipe.delete_blend_state = i915_delete_blend_state;
 724
 725    i915->pipe.create_sampler_state = i915_create_sampler_state;
 726    i915->pipe.bind_sampler_states = i915_bind_sampler_states;
 727    i915->pipe.delete_sampler_state = i915_delete_sampler_state;
 728
 729    i915->pipe.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 730    i915->pipe.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 731    i915->pipe.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 732
 733    i915->pipe.create_rasterizer_state = i915_create_rasterizer_state;
 734    i915->pipe.bind_rasterizer_state = i915_bind_rasterizer_state;
 735    i915->pipe.delete_rasterizer_state = i915_delete_rasterizer_state;
 736    i915->pipe.create_fs_state = i915_create_fs_state;
 737    i915->pipe.bind_fs_state = i915_bind_fs_state;
 738    i915->pipe.delete_fs_state = i915_delete_fs_state;
 739    i915->pipe.create_vs_state = i915_create_vs_state;
 740    i915->pipe.bind_vs_state = i915_bind_vs_state;
 741    i915->pipe.delete_vs_state = i915_delete_vs_state;
 742
 743    i915->pipe.set_blend_color = i915_set_blend_color;
 744    i915->pipe.set_clip_state = i915_set_clip_state;
 745    i915->pipe.set_constant_buffer = i915_set_constant_buffer;
 746    i915->pipe.set_framebuffer_state = i915_set_framebuffer_state;
 747
 748    i915->pipe.set_polygon_stipple = i915_set_polygon_stipple;
 749    i915->pipe.set_scissor_state = i915_set_scissor_state;
 750    i915->pipe.set_sampler_textures = i915_set_sampler_textures;
 751    i915->pipe.set_viewport_state = i915_set_viewport_state;
 752    i915->pipe.set_vertex_buffers = i915_set_vertex_buffers;
 753    i915->pipe.set_vertex_elements = i915_set_vertex_elements;
 754 }