src/gallium/drivers/r300/r300_state.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "util/u_math.h"
  24 #include "util/u_pack_color.h"
  25
  26 #include "util/u_debug.h"
  27 #include "pipe/internal/p_winsys_screen.h"
  28
  29 #include "r300_context.h"
  30 #include "r300_reg.h"
  31 #include "r300_state_shader.h"
  32
  33 /* r300_state: Functions used to intialize state context by translating
  34  * Gallium state objects into semi-native r300 state objects.
  35  *
  36  * XXX break this file up into pieces if it gets too big! */
  37
  38 /* Pack a float into a dword. */
  39 static uint32_t pack_float_32(float f)
  40 {
  41     union {
  42         float f;
  43         uint32_t u;
  44     } u;
  45
  46     u.f = f;
  47     return u.u;
  48 }
  49
  50 static uint32_t translate_blend_function(int blend_func) {
  51     switch (blend_func) {
  52         case PIPE_BLEND_ADD:
  53             return R300_COMB_FCN_ADD_CLAMP;
  54         case PIPE_BLEND_SUBTRACT:
  55             return R300_COMB_FCN_SUB_CLAMP;
  56         case PIPE_BLEND_REVERSE_SUBTRACT:
  57             return R300_COMB_FCN_RSUB_CLAMP;
  58         case PIPE_BLEND_MIN:
  59             return R300_COMB_FCN_MIN;
  60         case PIPE_BLEND_MAX:
  61             return R300_COMB_FCN_MAX;
  62         default:
  63             debug_printf("r300: Unknown blend function %d\n", blend_func);
  64             break;
  65     }
  66     return 0;
  67 }
  68
  69 /* XXX we can also offer the D3D versions of some of these... */
  70 static uint32_t translate_blend_factor(int blend_fact) {
  71     switch (blend_fact) {
  72         case PIPE_BLENDFACTOR_ONE:
  73             return R300_BLEND_GL_ONE;
  74         case PIPE_BLENDFACTOR_SRC_COLOR:
  75             return R300_BLEND_GL_SRC_COLOR;
  76         case PIPE_BLENDFACTOR_SRC_ALPHA:
  77             return R300_BLEND_GL_SRC_ALPHA;
  78         case PIPE_BLENDFACTOR_DST_ALPHA:
  79             return R300_BLEND_GL_DST_ALPHA;
  80         case PIPE_BLENDFACTOR_DST_COLOR:
  81             return R300_BLEND_GL_DST_COLOR;
  82         case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
  83             return R300_BLEND_GL_SRC_ALPHA_SATURATE;
  84         case PIPE_BLENDFACTOR_CONST_COLOR:
  85             return R300_BLEND_GL_CONST_COLOR;
  86         case PIPE_BLENDFACTOR_CONST_ALPHA:
  87             return R300_BLEND_GL_CONST_ALPHA;
  88         /* XXX WTF are these?
  89         case PIPE_BLENDFACTOR_SRC1_COLOR:
  90         case PIPE_BLENDFACTOR_SRC1_ALPHA: */
  91         case PIPE_BLENDFACTOR_ZERO:
  92             return R300_BLEND_GL_ZERO;
  93         case PIPE_BLENDFACTOR_INV_SRC_COLOR:
  94             return R300_BLEND_GL_ONE_MINUS_SRC_COLOR;
  95         case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
  96             return R300_BLEND_GL_ONE_MINUS_SRC_ALPHA;
  97         case PIPE_BLENDFACTOR_INV_DST_ALPHA:
  98             return R300_BLEND_GL_ONE_MINUS_DST_ALPHA;
  99         case PIPE_BLENDFACTOR_INV_DST_COLOR:
 100             return R300_BLEND_GL_ONE_MINUS_DST_COLOR;
 101         case PIPE_BLENDFACTOR_INV_CONST_COLOR:
 102             return R300_BLEND_GL_ONE_MINUS_CONST_COLOR;
 103         case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
 104             return R300_BLEND_GL_ONE_MINUS_CONST_ALPHA;
 105         /* XXX see above
 106         case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
 107         case PIPE_BLENDFACTOR_INV_SRC1_ALPHA: */
 108         default:
 109             debug_printf("r300: Unknown blend factor %d\n", blend_fact);
 110             break;
 111     }
 112     return 0;
 113 }
 114
 115 /* Create a new blend state based on the CSO blend state.
 116  *
 117  * This encompasses alpha blending, logic/raster ops, and blend dithering. */
 118 static void* r300_create_blend_state(struct pipe_context* pipe,
 119                                      const struct pipe_blend_state* state)
 120 {
 121     struct r300_blend_state* blend = CALLOC_STRUCT(r300_blend_state);
 122
 123     if (state->blend_enable) {
 124         /* XXX for now, always do separate alpha...
 125          * is it faster to do it with one reg? */
 126         blend->blend_control = R300_ALPHA_BLEND_ENABLE |
 127                 R300_SEPARATE_ALPHA_ENABLE |
 128                 R300_READ_ENABLE |
 129                 translate_blend_function(state->rgb_func) |
 130                 (translate_blend_factor(state->rgb_src_factor) <<
 131                     R300_SRC_BLEND_SHIFT) |
 132                 (translate_blend_factor(state->rgb_dst_factor) <<
 133                     R300_DST_BLEND_SHIFT);
 134         blend->alpha_blend_control =
 135                 translate_blend_function(state->alpha_func) |
 136                 (translate_blend_factor(state->alpha_src_factor) <<
 137                     R300_SRC_BLEND_SHIFT) |
 138                 (translate_blend_factor(state->alpha_dst_factor) <<
 139                     R300_DST_BLEND_SHIFT);
 140     }
 141
 142     /* PIPE_LOGICOP_* don't need to be translated, fortunately. */
 143     /* XXX are logicops still allowed if blending's disabled?
 144      * Does Gallium take care of it for us? */
 145     if (state->logicop_enable) {
 146         blend->rop = R300_RB3D_ROPCNTL_ROP_ENABLE |
 147                 (state->logicop_func) << R300_RB3D_ROPCNTL_ROP_SHIFT;
 148     }
 149
 150     if (state->dither) {
 151         blend->dither = R300_RB3D_DITHER_CTL_DITHER_MODE_LUT |
 152                 R300_RB3D_DITHER_CTL_ALPHA_DITHER_MODE_LUT;
 153     }
 154
 155     return (void*)blend;
 156 }
 157
 158 /* Bind blend state. */
 159 static void r300_bind_blend_state(struct pipe_context* pipe,
 160                                   void* state)
 161 {
 162     struct r300_context* r300 = r300_context(pipe);
 163
 164     r300->blend_state = (struct r300_blend_state*)state;
 165     r300->dirty_state |= R300_NEW_BLEND;
 166 }
 167
 168 /* Free blend state. */
 169 static void r300_delete_blend_state(struct pipe_context* pipe,
 170                                     void* state)
 171 {
 172     FREE(state);
 173 }
 174
 175 /* Set blend color.
 176  * Setup both R300 and R500 registers, figure out later which one to write. */
 177 static void r300_set_blend_color(struct pipe_context* pipe,
 178                                  const struct pipe_blend_color* color)
 179 {
 180     struct r300_context* r300 = r300_context(pipe);
 181     uint32_t r, g, b, a;
 182     ubyte ur, ug, ub, ua;
 183
 184     r = util_iround(color->color[0] * 1023.0f);
 185     g = util_iround(color->color[1] * 1023.0f);
 186     b = util_iround(color->color[2] * 1023.0f);
 187     a = util_iround(color->color[3] * 1023.0f);
 188
 189     ur = float_to_ubyte(color->color[0]);
 190     ug = float_to_ubyte(color->color[1]);
 191     ub = float_to_ubyte(color->color[2]);
 192     ua = float_to_ubyte(color->color[3]);
 193
 194     r300->blend_color_state->blend_color = (a << 24) | (r << 16) | (g << 8) | b;
 195
 196     r300->blend_color_state->blend_color_red_alpha = ur | (ua << 16);
 197     r300->blend_color_state->blend_color_green_blue = ub | (ug << 16);
 198
 199     r300->dirty_state |= R300_NEW_BLEND_COLOR;
 200 }
 201
 202 static void r300_set_clip_state(struct pipe_context* pipe,
 203                                 const struct pipe_clip_state* state)
 204 {
 205     struct r300_context* r300 = r300_context(pipe);
 206     /* XXX Draw */
 207     draw_flush(r300->draw);
 208     draw_set_clip_state(r300->draw, state);
 209 }
 210
 211 static void
 212     r300_set_constant_buffer(struct pipe_context* pipe,
 213                              uint shader, uint index,
 214                              const struct pipe_constant_buffer* buffer)
 215 {
 216     struct r300_context* r300 = r300_context(pipe);
 217
 218     /* This entire chunk of code seems ever-so-slightly baked.
 219      * It's as if I've got pipe_buffer* matryoshkas... */
 220     if (buffer && buffer->buffer && buffer->buffer->size) {
 221         void* map = pipe->winsys->buffer_map(pipe->winsys, buffer->buffer,
 222                                              PIPE_BUFFER_USAGE_CPU_READ);
 223         memcpy(r300->shader_constants[shader].constants,
 224             map, buffer->buffer->size);
 225         pipe->winsys->buffer_unmap(pipe->winsys, buffer->buffer);
 226
 227         r300->shader_constants[shader].user_count =
 228             buffer->buffer->size / (sizeof(float) * 4);
 229     } else {
 230         r300->shader_constants[shader].user_count = 0;
 231     }
 232
 233     r300->dirty_state |= R300_NEW_CONSTANTS;
 234 }
 235
 236 static uint32_t translate_depth_stencil_function(int zs_func) {
 237     switch (zs_func) {
 238         case PIPE_FUNC_NEVER:
 239             return R300_ZS_NEVER;
 240         case PIPE_FUNC_LESS:
 241             return R300_ZS_LESS;
 242         case PIPE_FUNC_EQUAL:
 243             return R300_ZS_EQUAL;
 244         case PIPE_FUNC_LEQUAL:
 245             return R300_ZS_LEQUAL;
 246         case PIPE_FUNC_GREATER:
 247             return R300_ZS_GREATER;
 248         case PIPE_FUNC_NOTEQUAL:
 249             return R300_ZS_NOTEQUAL;
 250         case PIPE_FUNC_GEQUAL:
 251             return R300_ZS_GEQUAL;
 252         case PIPE_FUNC_ALWAYS:
 253             return R300_ZS_ALWAYS;
 254         default:
 255             debug_printf("r300: Unknown depth/stencil function %d\n",
 256                 zs_func);
 257             break;
 258     }
 259     return 0;
 260 }
 261
 262 static uint32_t translate_stencil_op(int s_op) {
 263     switch (s_op) {
 264         case PIPE_STENCIL_OP_KEEP:
 265             return R300_ZS_KEEP;
 266         case PIPE_STENCIL_OP_ZERO:
 267             return R300_ZS_ZERO;
 268         case PIPE_STENCIL_OP_REPLACE:
 269             return R300_ZS_REPLACE;
 270         case PIPE_STENCIL_OP_INCR:
 271             return R300_ZS_INCR;
 272         case PIPE_STENCIL_OP_DECR:
 273             return R300_ZS_DECR;
 274         case PIPE_STENCIL_OP_INCR_WRAP:
 275             return R300_ZS_INCR_WRAP;
 276         case PIPE_STENCIL_OP_DECR_WRAP:
 277             return R300_ZS_DECR_WRAP;
 278         case PIPE_STENCIL_OP_INVERT:
 279             return R300_ZS_INVERT;
 280         default:
 281             debug_printf("r300: Unknown stencil op %d", s_op);
 282             break;
 283     }
 284     return 0;
 285 }
 286
 287 static uint32_t translate_alpha_function(int alpha_func) {
 288     switch (alpha_func) {
 289         case PIPE_FUNC_NEVER:
 290             return R300_FG_ALPHA_FUNC_NEVER;
 291         case PIPE_FUNC_LESS:
 292             return R300_FG_ALPHA_FUNC_LESS;
 293         case PIPE_FUNC_EQUAL:
 294             return R300_FG_ALPHA_FUNC_EQUAL;
 295         case PIPE_FUNC_LEQUAL:
 296             return R300_FG_ALPHA_FUNC_LE;
 297         case PIPE_FUNC_GREATER:
 298             return R300_FG_ALPHA_FUNC_GREATER;
 299         case PIPE_FUNC_NOTEQUAL:
 300             return R300_FG_ALPHA_FUNC_NOTEQUAL;
 301         case PIPE_FUNC_GEQUAL:
 302             return R300_FG_ALPHA_FUNC_GE;
 303         case PIPE_FUNC_ALWAYS:
 304             return R300_FG_ALPHA_FUNC_ALWAYS;
 305         default:
 306             debug_printf("r300: Unknown alpha function %d", alpha_func);
 307             break;
 308     }
 309     return 0;
 310 }
 311
 312 /* Create a new depth, stencil, and alpha state based on the CSO dsa state.
 313  *
 314  * This contains the depth buffer, stencil buffer, alpha test, and such.
 315  * On the Radeon, depth and stencil buffer setup are intertwined, which is
 316  * the reason for some of the strange-looking assignments across registers. */
 317 static void*
 318         r300_create_dsa_state(struct pipe_context* pipe,
 319                               const struct pipe_depth_stencil_alpha_state* state)
 320 {
 321     struct r300_dsa_state* dsa = CALLOC_STRUCT(r300_dsa_state);
 322
 323     /* Depth test setup. */
 324     if (state->depth.enabled) {
 325         dsa->z_buffer_control |= R300_Z_ENABLE;
 326
 327         if (state->depth.writemask) {
 328             dsa->z_buffer_control |= R300_Z_WRITE_ENABLE;
 329         }
 330
 331         dsa->z_stencil_control |=
 332             (translate_depth_stencil_function(state->depth.func) <<
 333                 R300_Z_FUNC_SHIFT);
 334     }
 335
 336     /* Stencil buffer setup. */
 337     if (state->stencil[0].enabled) {
 338         dsa->z_buffer_control |= R300_STENCIL_ENABLE;
 339         dsa->z_stencil_control |=
 340                 (translate_depth_stencil_function(state->stencil[0].func) <<
 341                     R300_S_FRONT_FUNC_SHIFT) |
 342                 (translate_stencil_op(state->stencil[0].fail_op) <<
 343                     R300_S_FRONT_SFAIL_OP_SHIFT) |
 344                 (translate_stencil_op(state->stencil[0].zpass_op) <<
 345                     R300_S_FRONT_ZPASS_OP_SHIFT) |
 346                 (translate_stencil_op(state->stencil[0].zfail_op) <<
 347                     R300_S_FRONT_ZFAIL_OP_SHIFT);
 348
 349         dsa->stencil_ref_mask = (state->stencil[0].ref_value) |
 350                 (state->stencil[0].valuemask << R300_STENCILMASK_SHIFT) |
 351                 (state->stencil[0].writemask << R300_STENCILWRITEMASK_SHIFT);
 352
 353         if (state->stencil[1].enabled) {
 354             dsa->z_buffer_control |= R300_STENCIL_FRONT_BACK;
 355             dsa->z_stencil_control |=
 356                 (translate_depth_stencil_function(state->stencil[1].func) <<
 357                     R300_S_BACK_FUNC_SHIFT) |
 358                 (translate_stencil_op(state->stencil[1].fail_op) <<
 359                     R300_S_BACK_SFAIL_OP_SHIFT) |
 360                 (translate_stencil_op(state->stencil[1].zpass_op) <<
 361                     R300_S_BACK_ZPASS_OP_SHIFT) |
 362                 (translate_stencil_op(state->stencil[1].zfail_op) <<
 363                     R300_S_BACK_ZFAIL_OP_SHIFT);
 364
 365             dsa->stencil_ref_bf = (state->stencil[1].ref_value) |
 366                 (state->stencil[1].valuemask << R300_STENCILMASK_SHIFT) |
 367                 (state->stencil[1].writemask << R300_STENCILWRITEMASK_SHIFT);
 368         }
 369     }
 370
 371     /* Alpha test setup. */
 372     if (state->alpha.enabled) {
 373         dsa->alpha_function = translate_alpha_function(state->alpha.func) |
 374             R300_FG_ALPHA_FUNC_ENABLE;
 375         dsa->alpha_reference = CLAMP(state->alpha.ref_value * 1023.0f,
 376                                      0, 1023);
 377     } else {
 378         dsa->z_buffer_top = R300_ZTOP_ENABLE;
 379     }
 380
 381     return (void*)dsa;
 382 }
 383
 384 /* Bind DSA state. */
 385 static void r300_bind_dsa_state(struct pipe_context* pipe,
 386                                 void* state)
 387 {
 388     struct r300_context* r300 = r300_context(pipe);
 389
 390     r300->dsa_state = (struct r300_dsa_state*)state;
 391     r300->dirty_state |= R300_NEW_DSA;
 392 }
 393
 394 /* Free DSA state. */
 395 static void r300_delete_dsa_state(struct pipe_context* pipe,
 396                                   void* state)
 397 {
 398     FREE(state);
 399 }
 400
 401 static void r300_set_edgeflags(struct pipe_context* pipe,
 402                                const unsigned* bitfield)
 403 {
 404     /* XXX you know it's bad when i915 has this blank too */
 405 }
 406
 407 static void
 408     r300_set_framebuffer_state(struct pipe_context* pipe,
 409                                const struct pipe_framebuffer_state* state)
 410 {
 411     struct r300_context* r300 = r300_context(pipe);
 412
 413     draw_flush(r300->draw);
 414
 415     r300->framebuffer_state = *state;
 416
 417     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 418 }
 419
 420 /* Create fragment shader state. */
 421 static void* r300_create_fs_state(struct pipe_context* pipe,
 422                                   const struct pipe_shader_state* shader)
 423 {
 424     struct r300_context* r300 = r300_context(pipe);
 425     struct r3xx_fragment_shader* fs = NULL;
 426
 427     if (r300_screen(r300->context.screen)->caps->is_r500) {
 428         fs =
 429             (struct r3xx_fragment_shader*)CALLOC_STRUCT(r500_fragment_shader);
 430     } else {
 431         fs =
 432             (struct r3xx_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 433     }
 434
 435     /* Copy state directly into shader. */
 436     fs->state = *shader;
 437
 438     tgsi_scan_shader(shader->tokens, &fs->info);
 439
 440     return (void*)fs;
 441 }
 442
 443 /* Bind fragment shader state. */
 444 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 445 {
 446     struct r300_context* r300 = r300_context(pipe);
 447     struct r3xx_fragment_shader* fs = (struct r3xx_fragment_shader*)shader;
 448
 449     if (fs == NULL) {
 450         r300->fs = NULL;
 451         return;
 452     } else if (!fs->translated) {
 453         if (r300_screen(r300->context.screen)->caps->is_r500) {
 454             r500_translate_fragment_shader(r300, (struct r500_fragment_shader*)fs);
 455         } else {
 456             r300_translate_fragment_shader(r300, (struct r300_fragment_shader*)fs);
 457         }
 458     }
 459
 460     fs->translated = true;
 461     r300->fs = fs;
 462
 463     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER;
 464 }
 465
 466 /* Delete fragment shader state. */
 467 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 468 {
 469     FREE(shader);
 470 }
 471
 472 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 473                                      const struct pipe_poly_stipple* state)
 474 {
 475     /* XXX */
 476 }
 477
 478 static INLINE int pack_float_16_6x(float f) {
 479     return ((int)(f * 6.0) & 0xffff);
 480 }
 481
 482 /* Create a new rasterizer state based on the CSO rasterizer state.
 483  *
 484  * This is a very large chunk of state, and covers most of the graphics
 485  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 486  *
 487  * In a not entirely unironic sidenote, this state has nearly nothing to do
 488  * with the actual block on the Radeon called the rasterizer (RS). */
 489 static void* r300_create_rs_state(struct pipe_context* pipe,
 490                                   const struct pipe_rasterizer_state* state)
 491 {
 492     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 493
 494     /* XXX this is part of HW TCL */
 495     /* XXX endian control */
 496     rs->vap_control_status = R300_VAP_TCL_BYPASS;
 497
 498     rs->point_size = pack_float_16_6x(state->point_size) |
 499         (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);
 500
 501     rs->line_control = pack_float_16_6x(state->line_width) |
 502         R300_GA_LINE_CNTL_END_TYPE_COMP;
 503
 504     /* Radeons don't think in "CW/CCW", they think in "front/back". */
 505     if (state->front_winding == PIPE_WINDING_CW) {
 506         rs->cull_mode = R300_FRONT_FACE_CW;
 507
 508         if (state->offset_cw) {
 509             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 510         }
 511         if (state->offset_ccw) {
 512             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 513         }
 514     } else {
 515         rs->cull_mode = R300_FRONT_FACE_CCW;
 516
 517         if (state->offset_ccw) {
 518             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 519         }
 520         if (state->offset_cw) {
 521             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 522         }
 523     }
 524     if (state->front_winding & state->cull_mode) {
 525         rs->cull_mode |= R300_CULL_FRONT;
 526     }
 527     if (~(state->front_winding) & state->cull_mode) {
 528         rs->cull_mode |= R300_CULL_BACK;
 529     }
 530
 531     if (rs->polygon_offset_enable) {
 532         rs->depth_offset_front = rs->depth_offset_back =
 533                 pack_float_32(state->offset_units);
 534         rs->depth_scale_front = rs->depth_scale_back =
 535                 pack_float_32(state->offset_scale);
 536     }
 537
 538     if (state->line_stipple_enable) {
 539         rs->line_stipple_config =
 540             R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
 541             (pack_float_32((float)state->line_stipple_factor) &
 542                 R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
 543         /* XXX this might need to be scaled up */
 544         rs->line_stipple_value = state->line_stipple_pattern;
 545     }
 546
 547     rs->rs = *state;
 548
 549     return (void*)rs;
 550 }
 551
 552 /* Bind rasterizer state. */
 553 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 554 {
 555     struct r300_context* r300 = r300_context(pipe);
 556     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 557
 558     draw_set_rasterizer_state(r300->draw, &rs->rs);
 559
 560     r300->rs_state = rs;
 561     r300->dirty_state |= R300_NEW_RASTERIZER;
 562 }
 563
 564 /* Free rasterizer state. */
 565 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 566 {
 567     FREE(state);
 568 }
 569
 570 static uint32_t translate_wrap(int wrap) {
 571     switch (wrap) {
 572         case PIPE_TEX_WRAP_REPEAT:
 573             return R300_TX_REPEAT;
 574         case PIPE_TEX_WRAP_CLAMP:
 575             return R300_TX_CLAMP;
 576         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
 577             return R300_TX_CLAMP_TO_EDGE;
 578         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
 579             return R300_TX_CLAMP_TO_BORDER;
 580         case PIPE_TEX_WRAP_MIRROR_REPEAT:
 581             return R300_TX_REPEAT | R300_TX_MIRRORED;
 582         case PIPE_TEX_WRAP_MIRROR_CLAMP:
 583             return R300_TX_CLAMP | R300_TX_MIRRORED;
 584         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
 585             return R300_TX_CLAMP_TO_EDGE | R300_TX_MIRRORED;
 586         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
 587             return R300_TX_CLAMP_TO_EDGE | R300_TX_MIRRORED;
 588         default:
 589             debug_printf("r300: Unknown texture wrap %d", wrap);
 590             return 0;
 591     }
 592 }
 593
 594 static uint32_t translate_tex_filters(int min, int mag, int mip) {
 595     uint32_t retval = 0;
 596     switch (min) {
 597         case PIPE_TEX_FILTER_NEAREST:
 598             retval |= R300_TX_MIN_FILTER_NEAREST;
 599         case PIPE_TEX_FILTER_LINEAR:
 600             retval |= R300_TX_MIN_FILTER_LINEAR;
 601         case PIPE_TEX_FILTER_ANISO:
 602             retval |= R300_TX_MIN_FILTER_ANISO;
 603         default:
 604             debug_printf("r300: Unknown texture filter %d", min);
 605             break;
 606     }
 607     switch (mag) {
 608         case PIPE_TEX_FILTER_NEAREST:
 609             retval |= R300_TX_MAG_FILTER_NEAREST;
 610         case PIPE_TEX_FILTER_LINEAR:
 611             retval |= R300_TX_MAG_FILTER_LINEAR;
 612         case PIPE_TEX_FILTER_ANISO:
 613             retval |= R300_TX_MAG_FILTER_ANISO;
 614         default:
 615             debug_printf("r300: Unknown texture filter %d", mag);
 616             break;
 617     }
 618     switch (mip) {
 619         case PIPE_TEX_MIPFILTER_NONE:
 620             retval |= R300_TX_MIN_FILTER_MIP_NONE;
 621         case PIPE_TEX_MIPFILTER_NEAREST:
 622             retval |= R300_TX_MIN_FILTER_MIP_NEAREST;
 623         case PIPE_TEX_MIPFILTER_LINEAR:
 624             retval |= R300_TX_MIN_FILTER_MIP_LINEAR;
 625         default:
 626             debug_printf("r300: Unknown texture filter %d", mip);
 627             break;
 628     }
 629
 630     return retval;
 631 }
 632
 633 static uint32_t anisotropy(float max_aniso) {
 634     if (max_aniso >= 16.0f) {
 635         return R300_TX_MAX_ANISO_16_TO_1;
 636     } else if (max_aniso >= 8.0f) {
 637         return R300_TX_MAX_ANISO_8_TO_1;
 638     } else if (max_aniso >= 4.0f) {
 639         return R300_TX_MAX_ANISO_4_TO_1;
 640     } else if (max_aniso >= 2.0f) {
 641         return R300_TX_MAX_ANISO_2_TO_1;
 642     } else {
 643         return R300_TX_MAX_ANISO_1_TO_1;
 644     }
 645 }
 646
 647 static void*
 648         r300_create_sampler_state(struct pipe_context* pipe,
 649                                   const struct pipe_sampler_state* state)
 650 {
 651     struct r300_context* r300 = r300_context(pipe);
 652     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 653     int lod_bias;
 654
 655     sampler->filter0 |=
 656         (translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 657         (translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 658         (translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 659
 660     sampler->filter0 |= translate_tex_filters(state->min_img_filter,
 661                                               state->mag_img_filter,
 662                                               state->min_mip_filter);
 663
 664     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 665
 666     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 667
 668     sampler->filter1 |= anisotropy(state->max_anisotropy);
 669
 670     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM,
 671                     &sampler->border_color);
 672
 673     /* R500-specific fixups and optimizations */
 674     if (r300_screen(r300->context.screen)->caps->is_r500) {
 675         sampler->filter1 |= R500_BORDER_FIX;
 676     }
 677
 678     return (void*)sampler;
 679 }
 680
 681 static void r300_bind_sampler_states(struct pipe_context* pipe,
 682                                      unsigned count,
 683                                      void** states)
 684 {
 685     struct r300_context* r300 = r300_context(pipe);
 686     int i;
 687
 688     if (count > 8) {
 689         return;
 690     }
 691
 692     for (i = 0; i < count; i++) {
 693         if (r300->sampler_states[i] != states[i]) {
 694             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 695             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 696         }
 697     }
 698
 699     r300->sampler_count = count;
 700 }
 701
 702 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 703 {
 704     FREE(state);
 705 }
 706
 707 static void r300_set_sampler_textures(struct pipe_context* pipe,
 708                                       unsigned count,
 709                                       struct pipe_texture** texture)
 710 {
 711     struct r300_context* r300 = r300_context(pipe);
 712     int i;
 713
 714     /* XXX magic num */
 715     if (count > 8) {
 716         return;
 717     }
 718
 719     for (i = 0; i < count; i++) {
 720         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 721             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 722                 texture[i]);
 723             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 724         }
 725     }
 726
 727     for (i = count; i < 8; i++) {
 728         if (r300->textures[i]) {
 729             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 730                 NULL);
 731             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 732         }
 733     }
 734
 735     r300->texture_count = count;
 736 }
 737
 738 static void r300_set_scissor_state(struct pipe_context* pipe,
 739                                    const struct pipe_scissor_state* state)
 740 {
 741     struct r300_context* r300 = r300_context(pipe);
 742     draw_flush(r300->draw);
 743
 744     r300->scissor_state->scissor_top_left =
 745         (state->minx << R300_SCISSORS_X_SHIFT) |
 746         (state->miny << R300_SCISSORS_Y_SHIFT);
 747     r300->scissor_state->scissor_bottom_right =
 748         (state->maxx << R300_SCISSORS_X_SHIFT) |
 749         (state->maxy << R300_SCISSORS_Y_SHIFT);
 750
 751     r300->dirty_state |= R300_NEW_SCISSOR;
 752 }
 753
 754 static void r300_set_viewport_state(struct pipe_context* pipe,
 755                                     const struct pipe_viewport_state* state)
 756 {
 757     struct r300_context* r300 = r300_context(pipe);
 758     /* XXX handing this off to Draw for now */
 759     draw_set_viewport_state(r300->draw, state);
 760 }
 761
 762 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 763                                     unsigned count,
 764                                     const struct pipe_vertex_buffer* buffers)
 765 {
 766     struct r300_context* r300 = r300_context(pipe);
 767
 768     memcpy(r300->vertex_buffers, buffers,
 769         sizeof(struct pipe_vertex_buffer) * count);
 770
 771     r300->vertex_buffer_count = count;
 772
 773     draw_flush(r300->draw);
 774     draw_set_vertex_buffers(r300->draw, count, buffers);
 775 }
 776
 777 static void r300_set_vertex_elements(struct pipe_context* pipe,
 778                                     unsigned count,
 779                                     const struct pipe_vertex_element* elements)
 780 {
 781     struct r300_context* r300 = r300_context(pipe);
 782     /* XXX Draw */
 783     draw_flush(r300->draw);
 784     draw_set_vertex_elements(r300->draw, count, elements);
 785 }
 786
 787 static void* r300_create_vs_state(struct pipe_context* pipe,
 788                                   const struct pipe_shader_state* state)
 789 {
 790     struct r300_context* context = r300_context(pipe);
 791     /* XXX handing this off to Draw for now */
 792     return draw_create_vertex_shader(context->draw, state);
 793 }
 794
 795 static void r300_bind_vs_state(struct pipe_context* pipe, void* state) {
 796     struct r300_context* context = r300_context(pipe);
 797     /* XXX handing this off to Draw for now */
 798     draw_bind_vertex_shader(context->draw, (struct draw_vertex_shader*)state);
 799 }
 800
 801 static void r300_delete_vs_state(struct pipe_context* pipe, void* state)
 802 {
 803     struct r300_context* context = r300_context(pipe);
 804     /* XXX handing this off to Draw for now */
 805     draw_delete_vertex_shader(context->draw, (struct draw_vertex_shader*)state);
 806 }
 807
 808 void r300_init_state_functions(struct r300_context* r300)
 809 {
 810     r300->context.create_blend_state = r300_create_blend_state;
 811     r300->context.bind_blend_state = r300_bind_blend_state;
 812     r300->context.delete_blend_state = r300_delete_blend_state;
 813
 814     r300->context.set_blend_color = r300_set_blend_color;
 815
 816     r300->context.set_clip_state = r300_set_clip_state;
 817
 818     r300->context.set_constant_buffer = r300_set_constant_buffer;
 819
 820     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 821     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 822     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 823
 824     r300->context.set_edgeflags = r300_set_edgeflags;
 825
 826     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 827
 828     r300->context.create_fs_state = r300_create_fs_state;
 829     r300->context.bind_fs_state = r300_bind_fs_state;
 830     r300->context.delete_fs_state = r300_delete_fs_state;
 831
 832     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 833
 834     r300->context.create_rasterizer_state = r300_create_rs_state;
 835     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 836     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 837
 838     r300->context.create_sampler_state = r300_create_sampler_state;
 839     r300->context.bind_sampler_states = r300_bind_sampler_states;
 840     r300->context.delete_sampler_state = r300_delete_sampler_state;
 841
 842     r300->context.set_sampler_textures = r300_set_sampler_textures;
 843
 844     r300->context.set_scissor_state = r300_set_scissor_state;
 845
 846     r300->context.set_viewport_state = r300_set_viewport_state;
 847
 848     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 849     r300->context.set_vertex_elements = r300_set_vertex_elements;
 850
 851     r300->context.create_vs_state = r300_create_vs_state;
 852     r300->context.bind_vs_state = r300_bind_vs_state;
 853     r300->context.delete_vs_state = r300_delete_vs_state;
 854 }