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 "pipe/internal/p_winsys_screen.h"
  34 #include "pipe/p_inlines.h"
  35 #include "util/u_math.h"
  36 #include "util/u_memory.h"
  37 #include "tgsi/tgsi_parse.h"
  38
  39 #include "i915_context.h"
  40 #include "i915_reg.h"
  41 #include "i915_state.h"
  42 #include "i915_state_inlines.h"
  43 #include "i915_fpc.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    /*
  62    case PIPE_TEX_WRAP_MIRRORED_REPEAT:
  63       return TEXCOORDMODE_MIRROR;
  64     */
  65    default:
  66       return TEXCOORDMODE_WRAP;
  67    }
  68 }
  69
  70 static unsigned translate_img_filter( unsigned filter )
  71 {
  72    switch (filter) {
  73    case PIPE_TEX_FILTER_NEAREST:
  74       return FILTER_NEAREST;
  75    case PIPE_TEX_FILTER_LINEAR:
  76       return FILTER_LINEAR;
  77    default:
  78       assert(0);
  79       return FILTER_NEAREST;
  80    }
  81 }
  82
  83 static unsigned translate_mip_filter( unsigned filter )
  84 {
  85    switch (filter) {
  86    case PIPE_TEX_MIPFILTER_NONE:
  87       return MIPFILTER_NONE;
  88    case PIPE_TEX_MIPFILTER_NEAREST:
  89       return MIPFILTER_NEAREST;
  90    case PIPE_TEX_MIPFILTER_LINEAR:
  91       return MIPFILTER_LINEAR;
  92    default:
  93       assert(0);
  94       return MIPFILTER_NONE;
  95    }
  96 }
  97
  98
  99 /* None of this state is actually used for anything yet.
 100  */
 101 static void *
 102 i915_create_blend_state(struct pipe_context *pipe,
 103                         const struct pipe_blend_state *blend)
 104 {
 105    struct i915_blend_state *cso_data = CALLOC_STRUCT( i915_blend_state );
 106
 107    {
 108       unsigned eqRGB  = blend->rgb_func;
 109       unsigned srcRGB = blend->rgb_src_factor;
 110       unsigned dstRGB = blend->rgb_dst_factor;
 111
 112       unsigned eqA    = blend->alpha_func;
 113       unsigned srcA   = blend->alpha_src_factor;
 114       unsigned dstA   = blend->alpha_dst_factor;
 115
 116       /* Special handling for MIN/MAX filter modes handled at
 117        * state_tracker level.
 118        */
 119
 120       if (srcA != srcRGB ||
 121           dstA != dstRGB ||
 122           eqA != eqRGB) {
 123
 124          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 125                           IAB_MODIFY_ENABLE |
 126                           IAB_ENABLE |
 127                           IAB_MODIFY_FUNC |
 128                           IAB_MODIFY_SRC_FACTOR |
 129                           IAB_MODIFY_DST_FACTOR |
 130                           SRC_ABLND_FACT(i915_translate_blend_factor(srcA)) |
 131                           DST_ABLND_FACT(i915_translate_blend_factor(dstA)) |
 132                           (i915_translate_blend_func(eqA) << IAB_FUNC_SHIFT));
 133       }
 134       else {
 135          cso_data->iab = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 136                           IAB_MODIFY_ENABLE |
 137                           0);
 138       }
 139    }
 140
 141    cso_data->modes4 |= (_3DSTATE_MODES_4_CMD |
 142                         ENABLE_LOGIC_OP_FUNC |
 143                         LOGIC_OP_FUNC(i915_translate_logic_op(blend->logicop_func)));
 144
 145    if (blend->logicop_enable)
 146       cso_data->LIS5 |= S5_LOGICOP_ENABLE;
 147
 148    if (blend->dither)
 149       cso_data->LIS5 |= S5_COLOR_DITHER_ENABLE;
 150
 151    if ((blend->colormask & PIPE_MASK_R) == 0)
 152       cso_data->LIS5 |= S5_WRITEDISABLE_RED;
 153
 154    if ((blend->colormask & PIPE_MASK_G) == 0)
 155       cso_data->LIS5 |= S5_WRITEDISABLE_GREEN;
 156
 157    if ((blend->colormask & PIPE_MASK_B) == 0)
 158       cso_data->LIS5 |= S5_WRITEDISABLE_BLUE;
 159
 160    if ((blend->colormask & PIPE_MASK_A) == 0)
 161       cso_data->LIS5 |= S5_WRITEDISABLE_ALPHA;
 162
 163    if (blend->blend_enable) {
 164       unsigned funcRGB = blend->rgb_func;
 165       unsigned srcRGB  = blend->rgb_src_factor;
 166       unsigned dstRGB  = blend->rgb_dst_factor;
 167
 168       cso_data->LIS6 |= (S6_CBUF_BLEND_ENABLE |
 169                          SRC_BLND_FACT(i915_translate_blend_factor(srcRGB)) |
 170                          DST_BLND_FACT(i915_translate_blend_factor(dstRGB)) |
 171                          (i915_translate_blend_func(funcRGB) << S6_CBUF_BLEND_FUNC_SHIFT));
 172    }
 173
 174    return cso_data;
 175 }
 176
 177 static void i915_bind_blend_state(struct pipe_context *pipe,
 178                                   void *blend)
 179 {
 180    struct i915_context *i915 = i915_context(pipe);
 181    draw_flush(i915->draw);
 182
 183    i915->blend = (struct i915_blend_state*)blend;
 184
 185    i915->dirty |= I915_NEW_BLEND;
 186 }
 187
 188
 189 static void i915_delete_blend_state(struct pipe_context *pipe, void *blend)
 190 {
 191    FREE(blend);
 192 }
 193
 194 static void i915_set_blend_color( struct pipe_context *pipe,
 195                              const struct pipe_blend_color *blend_color )
 196 {
 197    struct i915_context *i915 = i915_context(pipe);
 198    draw_flush(i915->draw);
 199
 200    i915->blend_color = *blend_color;
 201
 202    i915->dirty |= I915_NEW_BLEND;
 203 }
 204
 205 static void *
 206 i915_create_sampler_state(struct pipe_context *pipe,
 207                           const struct pipe_sampler_state *sampler)
 208 {
 209    struct i915_sampler_state *cso = CALLOC_STRUCT( i915_sampler_state );
 210    const unsigned ws = sampler->wrap_s;
 211    const unsigned wt = sampler->wrap_t;
 212    const unsigned wr = sampler->wrap_r;
 213    unsigned minFilt, magFilt;
 214    unsigned mipFilt;
 215
 216    cso->templ = sampler;
 217
 218    mipFilt = translate_mip_filter(sampler->min_mip_filter);
 219    minFilt = translate_img_filter( sampler->min_img_filter );
 220    magFilt = translate_img_filter( sampler->mag_img_filter );
 221
 222    if (sampler->max_anisotropy > 1.0)
 223       minFilt = magFilt = FILTER_ANISOTROPIC;
 224
 225    if (sampler->max_anisotropy > 2.0) {
 226       cso->state[0] |= SS2_MAX_ANISO_4;
 227    }
 228
 229    {
 230       int b = (int) (sampler->lod_bias * 16.0);
 231       b = CLAMP(b, -256, 255);
 232       cso->state[0] |= ((b << SS2_LOD_BIAS_SHIFT) & SS2_LOD_BIAS_MASK);
 233    }
 234
 235    /* Shadow:
 236     */
 237    if (sampler->compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE)
 238    {
 239       cso->state[0] |= (SS2_SHADOW_ENABLE |
 240                         i915_translate_compare_func(sampler->compare_func));
 241
 242       minFilt = FILTER_4X4_FLAT;
 243       magFilt = FILTER_4X4_FLAT;
 244    }
 245
 246    cso->state[0] |= ((minFilt << SS2_MIN_FILTER_SHIFT) |
 247                      (mipFilt << SS2_MIP_FILTER_SHIFT) |
 248                      (magFilt << SS2_MAG_FILTER_SHIFT));
 249
 250    cso->state[1] |=
 251       ((translate_wrap_mode(ws) << SS3_TCX_ADDR_MODE_SHIFT) |
 252        (translate_wrap_mode(wt) << SS3_TCY_ADDR_MODE_SHIFT) |
 253        (translate_wrap_mode(wr) << SS3_TCZ_ADDR_MODE_SHIFT));
 254
 255    if (sampler->normalized_coords)
 256       cso->state[1] |= SS3_NORMALIZED_COORDS;
 257
 258    {
 259       int minlod = (int) (16.0 * sampler->min_lod);
 260       int maxlod = (int) (16.0 * sampler->max_lod);
 261       minlod = CLAMP(minlod, 0, 16 * 11);
 262       maxlod = CLAMP(maxlod, 0, 16 * 11);
 263
 264       if (minlod > maxlod)
 265          maxlod = minlod;
 266
 267       cso->minlod = minlod;
 268       cso->maxlod = maxlod;
 269    }
 270
 271    {
 272       ubyte r = float_to_ubyte(sampler->border_color[0]);
 273       ubyte g = float_to_ubyte(sampler->border_color[1]);
 274       ubyte b = float_to_ubyte(sampler->border_color[2]);
 275       ubyte a = float_to_ubyte(sampler->border_color[3]);
 276       cso->state[2] = I915PACKCOLOR8888(r, g, b, a);
 277    }
 278    return cso;
 279 }
 280
 281 static void i915_bind_sampler_states(struct pipe_context *pipe,
 282                                      unsigned num, void **sampler)
 283 {
 284    struct i915_context *i915 = i915_context(pipe);
 285    unsigned i;
 286
 287    assert(num <= PIPE_MAX_SAMPLERS);
 288
 289    /* Check for no-op */
 290    if (num == i915->num_samplers &&
 291        !memcmp(i915->sampler, sampler, num * sizeof(void *)))
 292       return;
 293
 294    draw_flush(i915->draw);
 295
 296    for (i = 0; i < num; ++i)
 297       i915->sampler[i] = sampler[i];
 298    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 299       i915->sampler[i] = NULL;
 300
 301    i915->num_samplers = num;
 302
 303    i915->dirty |= I915_NEW_SAMPLER;
 304 }
 305
 306 static void i915_delete_sampler_state(struct pipe_context *pipe,
 307                                       void *sampler)
 308 {
 309    FREE(sampler);
 310 }
 311
 312
 313 /** XXX move someday?  Or consolidate all these simple state setters
 314  * into one file.
 315  */
 316
 317 static void *
 318 i915_create_depth_stencil_state(struct pipe_context *pipe,
 319                                 const struct pipe_depth_stencil_alpha_state *depth_stencil)
 320 {
 321    struct i915_depth_stencil_state *cso = CALLOC_STRUCT( i915_depth_stencil_state );
 322
 323    {
 324       int testmask = depth_stencil->stencil[0].valuemask & 0xff;
 325       int writemask = depth_stencil->stencil[0].writemask & 0xff;
 326
 327       cso->stencil_modes4 |= (_3DSTATE_MODES_4_CMD |
 328                               ENABLE_STENCIL_TEST_MASK |
 329                               STENCIL_TEST_MASK(testmask) |
 330                               ENABLE_STENCIL_WRITE_MASK |
 331                               STENCIL_WRITE_MASK(writemask));
 332    }
 333
 334    if (depth_stencil->stencil[0].enabled) {
 335       int test = i915_translate_compare_func(depth_stencil->stencil[0].func);
 336       int fop  = i915_translate_stencil_op(depth_stencil->stencil[0].fail_op);
 337       int dfop = i915_translate_stencil_op(depth_stencil->stencil[0].zfail_op);
 338       int dpop = i915_translate_stencil_op(depth_stencil->stencil[0].zpass_op);
 339       int ref  = depth_stencil->stencil[0].ref_value & 0xff;
 340
 341       cso->stencil_LIS5 |= (S5_STENCIL_TEST_ENABLE |
 342                             S5_STENCIL_WRITE_ENABLE |
 343                             (ref  << S5_STENCIL_REF_SHIFT) |
 344                             (test << S5_STENCIL_TEST_FUNC_SHIFT) |
 345                             (fop  << S5_STENCIL_FAIL_SHIFT) |
 346                             (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 347                             (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 348    }
 349
 350    if (depth_stencil->stencil[1].enabled) {
 351       int test  = i915_translate_compare_func(depth_stencil->stencil[1].func);
 352       int fop   = i915_translate_stencil_op(depth_stencil->stencil[1].fail_op);
 353       int dfop  = i915_translate_stencil_op(depth_stencil->stencil[1].zfail_op);
 354       int dpop  = i915_translate_stencil_op(depth_stencil->stencil[1].zpass_op);
 355       int ref   = depth_stencil->stencil[1].ref_value & 0xff;
 356       int tmask = depth_stencil->stencil[1].valuemask & 0xff;
 357       int wmask = depth_stencil->stencil[1].writemask & 0xff;
 358
 359       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 360                      BFO_ENABLE_STENCIL_FUNCS |
 361                      BFO_ENABLE_STENCIL_TWO_SIDE |
 362                      BFO_ENABLE_STENCIL_REF |
 363                      BFO_STENCIL_TWO_SIDE |
 364                      (ref  << BFO_STENCIL_REF_SHIFT) |
 365                      (test << BFO_STENCIL_TEST_SHIFT) |
 366                      (fop  << BFO_STENCIL_FAIL_SHIFT) |
 367                      (dfop << BFO_STENCIL_PASS_Z_FAIL_SHIFT) |
 368                      (dpop << BFO_STENCIL_PASS_Z_PASS_SHIFT));
 369
 370       cso->bfo[1] = (_3DSTATE_BACKFACE_STENCIL_MASKS |
 371                      BFM_ENABLE_STENCIL_TEST_MASK |
 372                      BFM_ENABLE_STENCIL_WRITE_MASK |
 373                      (tmask << BFM_STENCIL_TEST_MASK_SHIFT) |
 374                      (wmask << BFM_STENCIL_WRITE_MASK_SHIFT));
 375    }
 376    else {
 377       /* This actually disables two-side stencil: The bit set is a
 378        * modify-enable bit to indicate we are changing the two-side
 379        * setting.  Then there is a symbolic zero to show that we are
 380        * setting the flag to zero/off.
 381        */
 382       cso->bfo[0] = (_3DSTATE_BACKFACE_STENCIL_OPS |
 383                      BFO_ENABLE_STENCIL_TWO_SIDE |
 384                      0);
 385       cso->bfo[1] = 0;
 386    }
 387
 388    if (depth_stencil->depth.enabled) {
 389       int func = i915_translate_compare_func(depth_stencil->depth.func);
 390
 391       cso->depth_LIS6 |= (S6_DEPTH_TEST_ENABLE |
 392                           (func << S6_DEPTH_TEST_FUNC_SHIFT));
 393
 394       if (depth_stencil->depth.writemask)
 395          cso->depth_LIS6 |= S6_DEPTH_WRITE_ENABLE;
 396    }
 397
 398    if (depth_stencil->alpha.enabled) {
 399       int test = i915_translate_compare_func(depth_stencil->alpha.func);
 400       ubyte refByte = float_to_ubyte(depth_stencil->alpha.ref_value);
 401
 402       cso->depth_LIS6 |= (S6_ALPHA_TEST_ENABLE |
 403                           (test << S6_ALPHA_TEST_FUNC_SHIFT) |
 404                           (((unsigned) refByte) << S6_ALPHA_REF_SHIFT));
 405    }
 406
 407    return cso;
 408 }
 409
 410 static void i915_bind_depth_stencil_state(struct pipe_context *pipe,
 411                                           void *depth_stencil)
 412 {
 413    struct i915_context *i915 = i915_context(pipe);
 414    draw_flush(i915->draw);
 415
 416    i915->depth_stencil = (const struct i915_depth_stencil_state *)depth_stencil;
 417
 418    i915->dirty |= I915_NEW_DEPTH_STENCIL;
 419 }
 420
 421 static void i915_delete_depth_stencil_state(struct pipe_context *pipe,
 422                                             void *depth_stencil)
 423 {
 424    FREE(depth_stencil);
 425 }
 426
 427
 428 static void i915_set_scissor_state( struct pipe_context *pipe,
 429                                  const struct pipe_scissor_state *scissor )
 430 {
 431    struct i915_context *i915 = i915_context(pipe);
 432    draw_flush(i915->draw);
 433
 434    memcpy( &i915->scissor, scissor, sizeof(*scissor) );
 435    i915->dirty |= I915_NEW_SCISSOR;
 436 }
 437
 438
 439 static void i915_set_polygon_stipple( struct pipe_context *pipe,
 440                                    const struct pipe_poly_stipple *stipple )
 441 {
 442 }
 443
 444
 445
 446 static void *
 447 i915_create_fs_state(struct pipe_context *pipe,
 448                      const struct pipe_shader_state *templ)
 449 {
 450    struct i915_context *i915 = i915_context(pipe);
 451    struct i915_fragment_shader *ifs = CALLOC_STRUCT(i915_fragment_shader);
 452    if (!ifs)
 453       return NULL;
 454
 455    ifs->state.tokens = tgsi_dup_tokens(templ->tokens);
 456
 457    tgsi_scan_shader(templ->tokens, &ifs->info);
 458
 459    /* The shader's compiled to i915 instructions here */
 460    i915_translate_fragment_program(i915, ifs);
 461
 462    return ifs;
 463 }
 464
 465 static void
 466 i915_bind_fs_state(struct pipe_context *pipe, void *shader)
 467 {
 468    struct i915_context *i915 = i915_context(pipe);
 469    draw_flush(i915->draw);
 470
 471    i915->fs = (struct i915_fragment_shader*) shader;
 472
 473    i915->dirty |= I915_NEW_FS;
 474 }
 475
 476 static
 477 void i915_delete_fs_state(struct pipe_context *pipe, void *shader)
 478 {
 479    struct i915_fragment_shader *ifs = (struct i915_fragment_shader *) shader;
 480
 481    if (ifs->program)
 482       FREE(ifs->program);
 483    ifs->program_len = 0;
 484
 485    FREE((struct tgsi_token *)ifs->state.tokens);
 486
 487    FREE(ifs);
 488 }
 489
 490
 491 static void *
 492 i915_create_vs_state(struct pipe_context *pipe,
 493                      const struct pipe_shader_state *templ)
 494 {
 495    struct i915_context *i915 = i915_context(pipe);
 496
 497    /* just pass-through to draw module */
 498    return draw_create_vertex_shader(i915->draw, templ);
 499 }
 500
 501 static void i915_bind_vs_state(struct pipe_context *pipe, void *shader)
 502 {
 503    struct i915_context *i915 = i915_context(pipe);
 504
 505    /* just pass-through to draw module */
 506    draw_bind_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 507
 508    i915->dirty |= I915_NEW_VS;
 509 }
 510
 511 static void i915_delete_vs_state(struct pipe_context *pipe, void *shader)
 512 {
 513    struct i915_context *i915 = i915_context(pipe);
 514
 515    /* just pass-through to draw module */
 516    draw_delete_vertex_shader(i915->draw, (struct draw_vertex_shader *) shader);
 517 }
 518
 519 static void i915_set_constant_buffer(struct pipe_context *pipe,
 520                                      uint shader, uint index,
 521                                      const struct pipe_constant_buffer *buf)
 522 {
 523    struct i915_context *i915 = i915_context(pipe);
 524    struct pipe_screen *screen = pipe->screen;
 525    draw_flush(i915->draw);
 526
 527    assert(shader < PIPE_SHADER_TYPES);
 528    assert(index == 0);
 529
 530    /* Make a copy of shader constants.
 531     * During fragment program translation we may add additional
 532     * constants to the array.
 533     *
 534     * We want to consider the situation where some user constants
 535     * (ex: a material color) may change frequently but the shader program
 536     * stays the same.  In that case we should only be updating the first
 537     * N constants, leaving any extras from shader translation alone.
 538     */
 539    if (buf) {
 540       void *mapped;
 541       if (buf->buffer && buf->buffer->size &&
 542           (mapped = pipe_buffer_map(screen, buf->buffer,
 543                                     PIPE_BUFFER_USAGE_CPU_READ))) {
 544          memcpy(i915->current.constants[shader], mapped, buf->buffer->size);
 545          pipe_buffer_unmap(screen, buf->buffer);
 546          i915->current.num_user_constants[shader]
 547             = buf->buffer->size / (4 * sizeof(float));
 548       }
 549       else {
 550          i915->current.num_user_constants[shader] = 0;
 551       }
 552    }
 553
 554    i915->dirty |= I915_NEW_CONSTANTS;
 555 }
 556
 557
 558 static void i915_set_sampler_textures(struct pipe_context *pipe,
 559                                       unsigned num,
 560                                       struct pipe_texture **texture)
 561 {
 562    struct i915_context *i915 = i915_context(pipe);
 563    uint i;
 564
 565    assert(num <= PIPE_MAX_SAMPLERS);
 566
 567    /* Check for no-op */
 568    if (num == i915->num_textures &&
 569        !memcmp(i915->texture, texture, num * sizeof(struct pipe_texture *)))
 570       return;
 571
 572    /* Fixes wrong texture in texobj with VBUF */
 573    draw_flush(i915->draw);
 574
 575    for (i = 0; i < num; i++)
 576       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 577                              texture[i]);
 578
 579    for (i = num; i < i915->num_textures; i++)
 580       pipe_texture_reference((struct pipe_texture **) &i915->texture[i],
 581                              NULL);
 582
 583    i915->num_textures = num;
 584
 585    i915->dirty |= I915_NEW_TEXTURE;
 586 }
 587
 588
 589
 590 static void i915_set_framebuffer_state(struct pipe_context *pipe,
 591                                        const struct pipe_framebuffer_state *fb)
 592 {
 593    struct i915_context *i915 = i915_context(pipe);
 594    int i;
 595
 596    draw_flush(i915->draw);
 597
 598    i915->framebuffer.width = fb->width;
 599    i915->framebuffer.height = fb->height;
 600    i915->framebuffer.nr_cbufs = fb->nr_cbufs;
 601    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 602       pipe_surface_reference(&i915->framebuffer.cbufs[i], fb->cbufs[i]);
 603    }
 604    pipe_surface_reference(&i915->framebuffer.zsbuf, fb->zsbuf);
 605
 606    i915->dirty |= I915_NEW_FRAMEBUFFER;
 607 }
 608
 609
 610
 611 static void i915_set_clip_state( struct pipe_context *pipe,
 612                              const struct pipe_clip_state *clip )
 613 {
 614    struct i915_context *i915 = i915_context(pipe);
 615    draw_flush(i915->draw);
 616
 617    draw_set_clip_state(i915->draw, clip);
 618
 619    i915->dirty |= I915_NEW_CLIP;
 620 }
 621
 622
 623
 624 /* Called when driver state tracker notices changes to the viewport
 625  * matrix:
 626  */
 627 static void i915_set_viewport_state( struct pipe_context *pipe,
 628                                      const struct pipe_viewport_state *viewport )
 629 {
 630    struct i915_context *i915 = i915_context(pipe);
 631
 632    i915->viewport = *viewport; /* struct copy */
 633
 634    /* pass the viewport info to the draw module */
 635    draw_set_viewport_state(i915->draw, &i915->viewport);
 636
 637    i915->dirty |= I915_NEW_VIEWPORT;
 638 }
 639
 640
 641 static void *
 642 i915_create_rasterizer_state(struct pipe_context *pipe,
 643                              const struct pipe_rasterizer_state *rasterizer)
 644 {
 645    struct i915_rasterizer_state *cso = CALLOC_STRUCT( i915_rasterizer_state );
 646
 647    cso->templ = rasterizer;
 648    cso->color_interp = rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
 649    cso->light_twoside = rasterizer->light_twoside;
 650    cso->ds[0].u = _3DSTATE_DEPTH_OFFSET_SCALE;
 651    cso->ds[1].f = rasterizer->offset_scale;
 652    if (rasterizer->poly_stipple_enable) {
 653       cso->st |= ST1_ENABLE;
 654    }
 655
 656    if (rasterizer->scissor)
 657       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | ENABLE_SCISSOR_RECT;
 658    else
 659       cso->sc[0] = _3DSTATE_SCISSOR_ENABLE_CMD | DISABLE_SCISSOR_RECT;
 660
 661    switch (rasterizer->cull_mode) {
 662    case PIPE_WINDING_NONE:
 663       cso->LIS4 |= S4_CULLMODE_NONE;
 664       break;
 665    case PIPE_WINDING_CW:
 666       cso->LIS4 |= S4_CULLMODE_CW;
 667       break;
 668    case PIPE_WINDING_CCW:
 669       cso->LIS4 |= S4_CULLMODE_CCW;
 670       break;
 671    case PIPE_WINDING_BOTH:
 672       cso->LIS4 |= S4_CULLMODE_BOTH;
 673       break;
 674    }
 675
 676    {
 677       int line_width = CLAMP((int)(rasterizer->line_width * 2), 1, 0xf);
 678
 679       cso->LIS4 |= line_width << S4_LINE_WIDTH_SHIFT;
 680
 681       if (rasterizer->line_smooth)
 682          cso->LIS4 |= S4_LINE_ANTIALIAS_ENABLE;
 683    }
 684
 685    {
 686       int point_size = CLAMP((int) rasterizer->point_size, 1, 0xff);
 687
 688       cso->LIS4 |= point_size << S4_POINT_WIDTH_SHIFT;
 689    }
 690
 691    if (rasterizer->flatshade) {
 692       cso->LIS4 |= (S4_FLATSHADE_ALPHA |
 693                     S4_FLATSHADE_COLOR |
 694                     S4_FLATSHADE_SPECULAR);
 695    }
 696
 697    cso->LIS7 = fui( rasterizer->offset_units );
 698
 699
 700    return cso;
 701 }
 702
 703 static void i915_bind_rasterizer_state( struct pipe_context *pipe,
 704                                         void *raster )
 705 {
 706    struct i915_context *i915 = i915_context(pipe);
 707
 708    i915->rasterizer = (struct i915_rasterizer_state *)raster;
 709
 710    /* pass-through to draw module */
 711    draw_set_rasterizer_state(i915->draw,
 712                           (i915->rasterizer ? i915->rasterizer->templ : NULL));
 713
 714    i915->dirty |= I915_NEW_RASTERIZER;
 715 }
 716
 717 static void i915_delete_rasterizer_state(struct pipe_context *pipe,
 718                                          void *raster)
 719 {
 720    FREE(raster);
 721 }
 722
 723 static void i915_set_vertex_buffers(struct pipe_context *pipe,
 724                                     unsigned count,
 725                                     const struct pipe_vertex_buffer *buffers)
 726 {
 727    struct i915_context *i915 = i915_context(pipe);
 728    /* Because we change state before the draw_set_vertex_buffers call
 729     * we need a flush here, just to be sure.
 730     */
 731    draw_flush(i915->draw);
 732
 733    memcpy(i915->vertex_buffer, buffers, count * sizeof(buffers[0]));
 734    i915->num_vertex_buffers = count;
 735
 736    /* pass-through to draw module */
 737    draw_set_vertex_buffers(i915->draw, count, buffers);
 738 }
 739
 740 static void i915_set_vertex_elements(struct pipe_context *pipe,
 741                                      unsigned count,
 742                                      const struct pipe_vertex_element *elements)
 743 {
 744    struct i915_context *i915 = i915_context(pipe);
 745    /* Because we change state before the draw_set_vertex_buffers call
 746     * we need a flush here, just to be sure.
 747     */
 748    draw_flush(i915->draw);
 749
 750    i915->num_vertex_elements = count;
 751    /* pass-through to draw module */
 752    draw_set_vertex_elements(i915->draw, count, elements);
 753 }
 754
 755
 756 void
 757 i915_init_state_functions( struct i915_context *i915 )
 758 {
 759    i915->base.create_blend_state = i915_create_blend_state;
 760    i915->base.bind_blend_state = i915_bind_blend_state;
 761    i915->base.delete_blend_state = i915_delete_blend_state;
 762
 763    i915->base.create_sampler_state = i915_create_sampler_state;
 764    i915->base.bind_fragment_sampler_states = i915_bind_sampler_states;
 765    i915->base.delete_sampler_state = i915_delete_sampler_state;
 766
 767    i915->base.create_depth_stencil_alpha_state = i915_create_depth_stencil_state;
 768    i915->base.bind_depth_stencil_alpha_state = i915_bind_depth_stencil_state;
 769    i915->base.delete_depth_stencil_alpha_state = i915_delete_depth_stencil_state;
 770
 771    i915->base.create_rasterizer_state = i915_create_rasterizer_state;
 772    i915->base.bind_rasterizer_state = i915_bind_rasterizer_state;
 773    i915->base.delete_rasterizer_state = i915_delete_rasterizer_state;
 774    i915->base.create_fs_state = i915_create_fs_state;
 775    i915->base.bind_fs_state = i915_bind_fs_state;
 776    i915->base.delete_fs_state = i915_delete_fs_state;
 777    i915->base.create_vs_state = i915_create_vs_state;
 778    i915->base.bind_vs_state = i915_bind_vs_state;
 779    i915->base.delete_vs_state = i915_delete_vs_state;
 780
 781    i915->base.set_blend_color = i915_set_blend_color;
 782    i915->base.set_clip_state = i915_set_clip_state;
 783    i915->base.set_constant_buffer = i915_set_constant_buffer;
 784    i915->base.set_framebuffer_state = i915_set_framebuffer_state;
 785
 786    i915->base.set_polygon_stipple = i915_set_polygon_stipple;
 787    i915->base.set_scissor_state = i915_set_scissor_state;
 788    i915->base.set_fragment_sampler_textures = i915_set_sampler_textures;
 789    i915->base.set_viewport_state = i915_set_viewport_state;
 790    i915->base.set_vertex_buffers = i915_set_vertex_buffers;
 791    i915->base.set_vertex_elements = i915_set_vertex_elements;
 792 }