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 "pipe/p_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     return (void*)fs;
 439 }
 440
 441 /* Bind fragment shader state. */
 442 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 443 {
 444     struct r300_context* r300 = r300_context(pipe);
 445     struct r3xx_fragment_shader* fs = (struct r3xx_fragment_shader*)shader;
 446
 447     if (fs == NULL) {
 448         r300->fs = NULL;
 449         return;
 450     } else if (!fs->translated) {
 451         if (r300_screen(r300->context.screen)->caps->is_r500) {
 452             r500_translate_fragment_shader(r300, (struct r500_fragment_shader*)fs);
 453         } else {
 454             r300_translate_fragment_shader(r300, (struct r300_fragment_shader*)fs);
 455         }
 456     }
 457
 458     fs->translated = true;
 459     r300->fs = fs;
 460
 461     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER;
 462 }
 463
 464 /* Delete fragment shader state. */
 465 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 466 {
 467     FREE(shader);
 468 }
 469
 470 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 471                                      const struct pipe_poly_stipple* state)
 472 {
 473     /* XXX */
 474 }
 475
 476 static INLINE int pack_float_16_6x(float f) {
 477     return ((int)(f * 6.0) & 0xffff);
 478 }
 479
 480 /* Create a new rasterizer state based on the CSO rasterizer state.
 481  *
 482  * This is a very large chunk of state, and covers most of the graphics
 483  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 484  *
 485  * In a not entirely unironic sidenote, this state has nearly nothing to do
 486  * with the actual block on the Radeon called the rasterizer (RS). */
 487 static void* r300_create_rs_state(struct pipe_context* pipe,
 488                                   const struct pipe_rasterizer_state* state)
 489 {
 490     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 491
 492     /* XXX this is part of HW TCL */
 493     /* XXX endian control */
 494     rs->vap_control_status = R300_VAP_TCL_BYPASS;
 495
 496     rs->point_size = pack_float_16_6x(state->point_size) |
 497         (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);
 498
 499     rs->line_control = pack_float_16_6x(state->line_width) |
 500         R300_GA_LINE_CNTL_END_TYPE_COMP;
 501
 502     /* Radeons don't think in "CW/CCW", they think in "front/back". */
 503     if (state->front_winding == PIPE_WINDING_CW) {
 504         rs->cull_mode = R300_FRONT_FACE_CW;
 505
 506         if (state->offset_cw) {
 507             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 508         }
 509         if (state->offset_ccw) {
 510             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 511         }
 512     } else {
 513         rs->cull_mode = R300_FRONT_FACE_CCW;
 514
 515         if (state->offset_ccw) {
 516             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 517         }
 518         if (state->offset_cw) {
 519             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 520         }
 521     }
 522     if (state->front_winding & state->cull_mode) {
 523         rs->cull_mode |= R300_CULL_FRONT;
 524     }
 525     if (~(state->front_winding) & state->cull_mode) {
 526         rs->cull_mode |= R300_CULL_BACK;
 527     }
 528
 529     if (rs->polygon_offset_enable) {
 530         rs->depth_offset_front = rs->depth_offset_back =
 531                 pack_float_32(state->offset_units);
 532         rs->depth_scale_front = rs->depth_scale_back =
 533                 pack_float_32(state->offset_scale);
 534     }
 535
 536     if (state->line_stipple_enable) {
 537         rs->line_stipple_config =
 538             R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
 539             (pack_float_32((float)state->line_stipple_factor) &
 540                 R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
 541         /* XXX this might need to be scaled up */
 542         rs->line_stipple_value = state->line_stipple_pattern;
 543     }
 544
 545     rs->rs = *state;
 546
 547     return (void*)rs;
 548 }
 549
 550 /* Bind rasterizer state. */
 551 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 552 {
 553     struct r300_context* r300 = r300_context(pipe);
 554     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 555
 556     draw_set_rasterizer_state(r300->draw, &rs->rs);
 557
 558     r300->rs_state = rs;
 559     r300->dirty_state |= R300_NEW_RASTERIZER;
 560 }
 561
 562 /* Free rasterizer state. */
 563 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 564 {
 565     FREE(state);
 566 }
 567
 568 static uint32_t translate_wrap(int wrap) {
 569     switch (wrap) {
 570         case PIPE_TEX_WRAP_REPEAT:
 571             return R300_TX_REPEAT;
 572         case PIPE_TEX_WRAP_CLAMP:
 573             return R300_TX_CLAMP;
 574         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
 575             return R300_TX_CLAMP_TO_EDGE;
 576         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
 577             return R300_TX_CLAMP_TO_BORDER;
 578         case PIPE_TEX_WRAP_MIRROR_REPEAT:
 579             return R300_TX_REPEAT | R300_TX_MIRRORED;
 580         case PIPE_TEX_WRAP_MIRROR_CLAMP:
 581             return R300_TX_CLAMP | R300_TX_MIRRORED;
 582         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
 583             return R300_TX_CLAMP_TO_EDGE | R300_TX_MIRRORED;
 584         case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
 585             return R300_TX_CLAMP_TO_EDGE | R300_TX_MIRRORED;
 586         default:
 587             debug_printf("r300: Unknown texture wrap %d", wrap);
 588             return 0;
 589     }
 590 }
 591
 592 static uint32_t translate_tex_filters(int min, int mag, int mip) {
 593     uint32_t retval = 0;
 594     switch (min) {
 595         case PIPE_TEX_FILTER_NEAREST:
 596             retval |= R300_TX_MIN_FILTER_NEAREST;
 597         case PIPE_TEX_FILTER_LINEAR:
 598             retval |= R300_TX_MIN_FILTER_LINEAR;
 599         case PIPE_TEX_FILTER_ANISO:
 600             retval |= R300_TX_MIN_FILTER_ANISO;
 601         default:
 602             debug_printf("r300: Unknown texture filter %d", min);
 603             break;
 604     }
 605     switch (mag) {
 606         case PIPE_TEX_FILTER_NEAREST:
 607             retval |= R300_TX_MAG_FILTER_NEAREST;
 608         case PIPE_TEX_FILTER_LINEAR:
 609             retval |= R300_TX_MAG_FILTER_LINEAR;
 610         case PIPE_TEX_FILTER_ANISO:
 611             retval |= R300_TX_MAG_FILTER_ANISO;
 612         default:
 613             debug_printf("r300: Unknown texture filter %d", mag);
 614             break;
 615     }
 616     switch (mip) {
 617         case PIPE_TEX_MIPFILTER_NONE:
 618             retval |= R300_TX_MIN_FILTER_MIP_NONE;
 619         case PIPE_TEX_MIPFILTER_NEAREST:
 620             retval |= R300_TX_MIN_FILTER_MIP_NEAREST;
 621         case PIPE_TEX_MIPFILTER_LINEAR:
 622             retval |= R300_TX_MIN_FILTER_MIP_LINEAR;
 623         default:
 624             debug_printf("r300: Unknown texture filter %d", mip);
 625             break;
 626     }
 627
 628     return retval;
 629 }
 630
 631 static uint32_t anisotropy(float max_aniso) {
 632     if (max_aniso >= 16.0f) {
 633         return R300_TX_MAX_ANISO_16_TO_1;
 634     } else if (max_aniso >= 8.0f) {
 635         return R300_TX_MAX_ANISO_8_TO_1;
 636     } else if (max_aniso >= 4.0f) {
 637         return R300_TX_MAX_ANISO_4_TO_1;
 638     } else if (max_aniso >= 2.0f) {
 639         return R300_TX_MAX_ANISO_2_TO_1;
 640     } else {
 641         return R300_TX_MAX_ANISO_1_TO_1;
 642     }
 643 }
 644
 645 static void*
 646         r300_create_sampler_state(struct pipe_context* pipe,
 647                                   const struct pipe_sampler_state* state)
 648 {
 649     struct r300_context* r300 = r300_context(pipe);
 650     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 651     int lod_bias;
 652
 653     sampler->filter0 |=
 654         (translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 655         (translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 656         (translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 657
 658     sampler->filter0 |= translate_tex_filters(state->min_img_filter,
 659                                               state->mag_img_filter,
 660                                               state->min_mip_filter);
 661
 662     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 663
 664     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 665
 666     sampler->filter1 |= anisotropy(state->max_anisotropy);
 667
 668     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM,
 669                     &sampler->border_color);
 670
 671     /* R500-specific fixups and optimizations */
 672     if (r300_screen(r300->context.screen)->caps->is_r500) {
 673         sampler->filter1 |= R500_BORDER_FIX;
 674     }
 675
 676     return (void*)sampler;
 677 }
 678
 679 static void r300_bind_sampler_states(struct pipe_context* pipe,
 680                                      unsigned count,
 681                                      void** states)
 682 {
 683     struct r300_context* r300 = r300_context(pipe);
 684     int i;
 685
 686     if (count > 8) {
 687         return;
 688     }
 689
 690     for (i = 0; i < count; i++) {
 691         if (r300->sampler_states[i] != states[i]) {
 692             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 693             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 694         }
 695     }
 696
 697     r300->sampler_count = count;
 698 }
 699
 700 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 701 {
 702     FREE(state);
 703 }
 704
 705 static void r300_set_sampler_textures(struct pipe_context* pipe,
 706                                       unsigned count,
 707                                       struct pipe_texture** texture)
 708 {
 709     struct r300_context* r300 = r300_context(pipe);
 710     int i;
 711
 712     /* XXX magic num */
 713     if (count > 8) {
 714         return;
 715     }
 716
 717     for (i = 0; i < count; i++) {
 718         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 719             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 720                 texture[i]);
 721             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 722         }
 723     }
 724
 725     for (i = count; i < 8; i++) {
 726         if (r300->textures[i]) {
 727             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 728                 NULL);
 729             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 730         }
 731     }
 732
 733     r300->texture_count = count;
 734 }
 735
 736 static void r300_set_scissor_state(struct pipe_context* pipe,
 737                                    const struct pipe_scissor_state* state)
 738 {
 739     struct r300_context* r300 = r300_context(pipe);
 740     draw_flush(r300->draw);
 741
 742     r300->scissor_state->scissor_top_left =
 743         (state->minx << R300_SCISSORS_X_SHIFT) |
 744         (state->miny << R300_SCISSORS_Y_SHIFT);
 745     r300->scissor_state->scissor_bottom_right =
 746         (state->maxx << R300_SCISSORS_X_SHIFT) |
 747         (state->maxy << R300_SCISSORS_Y_SHIFT);
 748
 749     r300->dirty_state |= R300_NEW_SCISSOR;
 750 }
 751
 752 static void r300_set_viewport_state(struct pipe_context* pipe,
 753                                     const struct pipe_viewport_state* state)
 754 {
 755     struct r300_context* r300 = r300_context(pipe);
 756     /* XXX handing this off to Draw for now */
 757     draw_set_viewport_state(r300->draw, state);
 758 }
 759
 760 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 761                                     unsigned count,
 762                                     const struct pipe_vertex_buffer* buffers)
 763 {
 764     struct r300_context* r300 = r300_context(pipe);
 765
 766     memcpy(r300->vertex_buffers, buffers,
 767         sizeof(struct pipe_vertex_buffer) * count);
 768
 769     r300->vertex_buffer_count = count;
 770
 771     draw_flush(r300->draw);
 772     draw_set_vertex_buffers(r300->draw, count, buffers);
 773 }
 774
 775 static void r300_set_vertex_elements(struct pipe_context* pipe,
 776                                     unsigned count,
 777                                     const struct pipe_vertex_element* elements)
 778 {
 779     struct r300_context* r300 = r300_context(pipe);
 780     /* XXX Draw */
 781     draw_flush(r300->draw);
 782     draw_set_vertex_elements(r300->draw, count, elements);
 783 }
 784
 785 static void* r300_create_vs_state(struct pipe_context* pipe,
 786                                   const struct pipe_shader_state* state)
 787 {
 788     struct r300_context* context = r300_context(pipe);
 789     /* XXX handing this off to Draw for now */
 790     return draw_create_vertex_shader(context->draw, state);
 791 }
 792
 793 static void r300_bind_vs_state(struct pipe_context* pipe, void* state) {
 794     struct r300_context* context = r300_context(pipe);
 795     /* XXX handing this off to Draw for now */
 796     draw_bind_vertex_shader(context->draw, (struct draw_vertex_shader*)state);
 797 }
 798
 799 static void r300_delete_vs_state(struct pipe_context* pipe, void* state)
 800 {
 801     struct r300_context* context = r300_context(pipe);
 802     /* XXX handing this off to Draw for now */
 803     draw_delete_vertex_shader(context->draw, (struct draw_vertex_shader*)state);
 804 }
 805
 806 void r300_init_state_functions(struct r300_context* r300)
 807 {
 808     r300->context.create_blend_state = r300_create_blend_state;
 809     r300->context.bind_blend_state = r300_bind_blend_state;
 810     r300->context.delete_blend_state = r300_delete_blend_state;
 811
 812     r300->context.set_blend_color = r300_set_blend_color;
 813
 814     r300->context.set_clip_state = r300_set_clip_state;
 815
 816     r300->context.set_constant_buffer = r300_set_constant_buffer;
 817
 818     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 819     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 820     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 821
 822     r300->context.set_edgeflags = r300_set_edgeflags;
 823
 824     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 825
 826     r300->context.create_fs_state = r300_create_fs_state;
 827     r300->context.bind_fs_state = r300_bind_fs_state;
 828     r300->context.delete_fs_state = r300_delete_fs_state;
 829
 830     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 831
 832     r300->context.create_rasterizer_state = r300_create_rs_state;
 833     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 834     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 835
 836     r300->context.create_sampler_state = r300_create_sampler_state;
 837     r300->context.bind_sampler_states = r300_bind_sampler_states;
 838     r300->context.delete_sampler_state = r300_delete_sampler_state;
 839
 840     r300->context.set_sampler_textures = r300_set_sampler_textures;
 841
 842     r300->context.set_scissor_state = r300_set_scissor_state;
 843
 844     r300->context.set_viewport_state = r300_set_viewport_state;
 845
 846     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 847     r300->context.set_vertex_elements = r300_set_vertex_elements;
 848
 849     r300->context.create_vs_state = r300_create_vs_state;
 850     r300->context.bind_vs_state = r300_bind_vs_state;
 851     r300->context.delete_vs_state = r300_delete_vs_state;
 852 }