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 "draw/draw_context.h"
  24
  25 #include "util/u_math.h"
  26 #include "util/u_memory.h"
  27 #include "util/u_pack_color.h"
  28
  29 #include "tgsi/tgsi_parse.h"
  30
  31 #include "pipe/p_config.h"
  32 #include "pipe/internal/p_winsys_screen.h"
  33
  34 #include "r300_context.h"
  35 #include "r300_reg.h"
  36 #include "r300_screen.h"
  37 #include "r300_state_inlines.h"
  38 #include "r300_fs.h"
  39 #include "r300_vs.h"
  40
  41 /* r300_state: Functions used to intialize state context by translating
  42  * Gallium state objects into semi-native r300 state objects. */
  43
  44 /* Create a new blend state based on the CSO blend state.
  45  *
  46  * This encompasses alpha blending, logic/raster ops, and blend dithering. */
  47 static void* r300_create_blend_state(struct pipe_context* pipe,
  48                                      const struct pipe_blend_state* state)
  49 {
  50     struct r300_blend_state* blend = CALLOC_STRUCT(r300_blend_state);
  51
  52     if (state->blend_enable)
  53     {
  54         unsigned eqRGB = state->rgb_func;
  55         unsigned srcRGB = state->rgb_src_factor;
  56         unsigned dstRGB = state->rgb_dst_factor;
  57
  58         unsigned eqA = state->alpha_func;
  59         unsigned srcA = state->alpha_src_factor;
  60         unsigned dstA = state->alpha_dst_factor;
  61
  62         /* despite the name, ALPHA_BLEND_ENABLE has nothing to do with alpha,
  63          * this is just the crappy D3D naming */
  64         blend->blend_control = R300_ALPHA_BLEND_ENABLE |
  65             r300_translate_blend_function(eqRGB) |
  66             ( r300_translate_blend_factor(srcRGB) << R300_SRC_BLEND_SHIFT) |
  67             ( r300_translate_blend_factor(dstRGB) << R300_DST_BLEND_SHIFT);
  68
  69         /* optimization: some operations do not require the destination color */
  70         if (eqRGB == PIPE_BLEND_MIN || eqA == PIPE_BLEND_MIN ||
  71             eqRGB == PIPE_BLEND_MAX || eqA == PIPE_BLEND_MAX ||
  72             dstRGB != PIPE_BLENDFACTOR_ZERO ||
  73             dstA != PIPE_BLENDFACTOR_ZERO ||
  74             srcRGB == PIPE_BLENDFACTOR_DST_COLOR ||
  75             srcRGB == PIPE_BLENDFACTOR_DST_ALPHA ||
  76             srcRGB == PIPE_BLENDFACTOR_INV_DST_COLOR ||
  77             srcRGB == PIPE_BLENDFACTOR_INV_DST_ALPHA ||
  78             srcA == PIPE_BLENDFACTOR_DST_COLOR ||
  79             srcA == PIPE_BLENDFACTOR_DST_ALPHA ||
  80             srcA == PIPE_BLENDFACTOR_INV_DST_COLOR ||
  81             srcA == PIPE_BLENDFACTOR_INV_DST_ALPHA)
  82             blend->blend_control |= R300_READ_ENABLE;
  83
  84         /* XXX implement the optimization with DISCARD_SRC_PIXELS*/
  85         /* XXX implement the optimization with SRC_ALPHA_?_NO_READ */
  86
  87         /* separate alpha */
  88         if (srcA != srcRGB || dstA != dstRGB || eqA != eqRGB) {
  89             blend->blend_control |= R300_SEPARATE_ALPHA_ENABLE;
  90             blend->alpha_blend_control =
  91                 r300_translate_blend_function(eqA) |
  92                 (r300_translate_blend_factor(srcA) << R300_SRC_BLEND_SHIFT) |
  93                 (r300_translate_blend_factor(dstA) << R300_DST_BLEND_SHIFT);
  94         }
  95     }
  96
  97     /* PIPE_LOGICOP_* don't need to be translated, fortunately. */
  98     if (state->logicop_enable) {
  99         blend->rop = R300_RB3D_ROPCNTL_ROP_ENABLE |
 100                 (state->logicop_func) << R300_RB3D_ROPCNTL_ROP_SHIFT;
 101     }
 102
 103     /* Color Channel Mask */
 104     if (state->colormask & PIPE_MASK_R) {
 105         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_RED_MASK0;
 106     }
 107     if (state->colormask & PIPE_MASK_G) {
 108         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_GREEN_MASK0;
 109     }
 110     if (state->colormask & PIPE_MASK_B) {
 111         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_BLUE_MASK0;
 112     }
 113     if (state->colormask & PIPE_MASK_A) {
 114         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_ALPHA_MASK0;
 115     }
 116
 117     if (state->dither) {
 118         blend->dither = R300_RB3D_DITHER_CTL_DITHER_MODE_LUT |
 119                 R300_RB3D_DITHER_CTL_ALPHA_DITHER_MODE_LUT;
 120     }
 121
 122     return (void*)blend;
 123 }
 124
 125 /* Bind blend state. */
 126 static void r300_bind_blend_state(struct pipe_context* pipe,
 127                                   void* state)
 128 {
 129     struct r300_context* r300 = r300_context(pipe);
 130
 131     r300->blend_state = (struct r300_blend_state*)state;
 132     r300->dirty_state |= R300_NEW_BLEND;
 133 }
 134
 135 /* Free blend state. */
 136 static void r300_delete_blend_state(struct pipe_context* pipe,
 137                                     void* state)
 138 {
 139     FREE(state);
 140 }
 141
 142 /* Convert float to 10bit integer */
 143 static unsigned float_to_fixed10(float f)
 144 {
 145     return CLAMP((unsigned)(f * 1023.9f), 0, 1023);
 146 }
 147
 148 /* Set blend color.
 149  * Setup both R300 and R500 registers, figure out later which one to write. */
 150 static void r300_set_blend_color(struct pipe_context* pipe,
 151                                  const struct pipe_blend_color* color)
 152 {
 153     struct r300_context* r300 = r300_context(pipe);
 154     union util_color uc;
 155
 156     util_pack_color(color->color, PIPE_FORMAT_A8R8G8B8_UNORM, &uc);
 157     r300->blend_color_state->blend_color = uc.ui;
 158
 159     /* XXX if FP16 blending is enabled, we should use the FP16 format */
 160     r300->blend_color_state->blend_color_red_alpha =
 161         float_to_fixed10(color->color[0]) |
 162         (float_to_fixed10(color->color[3]) << 16);
 163     r300->blend_color_state->blend_color_green_blue =
 164         float_to_fixed10(color->color[2]) |
 165         (float_to_fixed10(color->color[1]) << 16);
 166
 167     r300->dirty_state |= R300_NEW_BLEND_COLOR;
 168 }
 169
 170 static void r300_set_clip_state(struct pipe_context* pipe,
 171                                 const struct pipe_clip_state* state)
 172 {
 173     struct r300_context* r300 = r300_context(pipe);
 174
 175     if (r300_screen(pipe->screen)->caps->has_tcl) {
 176         r300->clip_state = *state;
 177         r300->dirty_state |= R300_NEW_CLIP;
 178     } else {
 179         draw_flush(r300->draw);
 180         draw_set_clip_state(r300->draw, state);
 181     }
 182 }
 183
 184 /* Create a new depth, stencil, and alpha state based on the CSO dsa state.
 185  *
 186  * This contains the depth buffer, stencil buffer, alpha test, and such.
 187  * On the Radeon, depth and stencil buffer setup are intertwined, which is
 188  * the reason for some of the strange-looking assignments across registers. */
 189 static void*
 190         r300_create_dsa_state(struct pipe_context* pipe,
 191                               const struct pipe_depth_stencil_alpha_state* state)
 192 {
 193     struct r300_capabilities *caps =
 194         r300_screen(r300_context(pipe)->context.screen)->caps;
 195     struct r300_dsa_state* dsa = CALLOC_STRUCT(r300_dsa_state);
 196
 197     /* Depth test setup. */
 198     if (state->depth.enabled) {
 199         dsa->z_buffer_control |= R300_Z_ENABLE;
 200
 201         if (state->depth.writemask) {
 202             dsa->z_buffer_control |= R300_Z_WRITE_ENABLE;
 203         }
 204
 205         dsa->z_stencil_control |=
 206             (r300_translate_depth_stencil_function(state->depth.func) <<
 207                 R300_Z_FUNC_SHIFT);
 208     }
 209
 210     /* Stencil buffer setup. */
 211     if (state->stencil[0].enabled) {
 212         dsa->z_buffer_control |= R300_STENCIL_ENABLE;
 213         dsa->z_stencil_control |=
 214             (r300_translate_depth_stencil_function(state->stencil[0].func) <<
 215                 R300_S_FRONT_FUNC_SHIFT) |
 216             (r300_translate_stencil_op(state->stencil[0].fail_op) <<
 217                 R300_S_FRONT_SFAIL_OP_SHIFT) |
 218             (r300_translate_stencil_op(state->stencil[0].zpass_op) <<
 219                 R300_S_FRONT_ZPASS_OP_SHIFT) |
 220             (r300_translate_stencil_op(state->stencil[0].zfail_op) <<
 221                 R300_S_FRONT_ZFAIL_OP_SHIFT);
 222
 223         dsa->stencil_ref_mask = (state->stencil[0].ref_value) |
 224                 (state->stencil[0].valuemask << R300_STENCILMASK_SHIFT) |
 225                 (state->stencil[0].writemask << R300_STENCILWRITEMASK_SHIFT);
 226
 227         if (state->stencil[1].enabled) {
 228             dsa->z_buffer_control |= R300_STENCIL_FRONT_BACK;
 229             dsa->z_stencil_control |=
 230             (r300_translate_depth_stencil_function(state->stencil[1].func) <<
 231                 R300_S_BACK_FUNC_SHIFT) |
 232             (r300_translate_stencil_op(state->stencil[1].fail_op) <<
 233                 R300_S_BACK_SFAIL_OP_SHIFT) |
 234             (r300_translate_stencil_op(state->stencil[1].zpass_op) <<
 235                 R300_S_BACK_ZPASS_OP_SHIFT) |
 236             (r300_translate_stencil_op(state->stencil[1].zfail_op) <<
 237                 R300_S_BACK_ZFAIL_OP_SHIFT);
 238
 239             /* XXX it seems r3xx doesn't support STENCILREFMASK_BF */
 240             if (caps->is_r500)
 241             {
 242                 dsa->z_buffer_control |= R500_STENCIL_REFMASK_FRONT_BACK;
 243                 dsa->stencil_ref_bf = (state->stencil[1].ref_value) |
 244                     (state->stencil[1].valuemask <<
 245                     R300_STENCILMASK_SHIFT) |
 246                     (state->stencil[1].writemask <<
 247                     R300_STENCILWRITEMASK_SHIFT);
 248             }
 249         }
 250     }
 251
 252     /* Alpha test setup. */
 253     if (state->alpha.enabled) {
 254         dsa->alpha_function =
 255             r300_translate_alpha_function(state->alpha.func) |
 256             R300_FG_ALPHA_FUNC_ENABLE;
 257
 258         /* XXX figure out why emitting 10bit alpha ref causes CS to dump */
 259         /* always use 8bit alpha ref */
 260         dsa->alpha_function |= float_to_ubyte(state->alpha.ref_value);
 261
 262         if (caps->is_r500)
 263             dsa->alpha_function |= R500_FG_ALPHA_FUNC_8BIT;
 264     }
 265
 266     return (void*)dsa;
 267 }
 268
 269 /* Bind DSA state. */
 270 static void r300_bind_dsa_state(struct pipe_context* pipe,
 271                                 void* state)
 272 {
 273     struct r300_context* r300 = r300_context(pipe);
 274
 275     r300->dsa_state = (struct r300_dsa_state*)state;
 276     r300->dirty_state |= R300_NEW_DSA;
 277 }
 278
 279 /* Free DSA state. */
 280 static void r300_delete_dsa_state(struct pipe_context* pipe,
 281                                   void* state)
 282 {
 283     FREE(state);
 284 }
 285
 286 static void r300_set_scissor_regs(const struct pipe_scissor_state* state,
 287                                   struct r300_scissor_regs *scissor,
 288                                   boolean is_r500)
 289 {
 290     if (is_r500) {
 291         scissor->top_left =
 292             (state->minx << R300_SCISSORS_X_SHIFT) |
 293             (state->miny << R300_SCISSORS_Y_SHIFT);
 294         scissor->bottom_right =
 295             ((state->maxx - 1) << R300_SCISSORS_X_SHIFT) |
 296             ((state->maxy - 1) << R300_SCISSORS_Y_SHIFT);
 297     } else {
 298         /* Offset of 1440 in non-R500 chipsets. */
 299         scissor->top_left =
 300             ((state->minx + 1440) << R300_SCISSORS_X_SHIFT) |
 301             ((state->miny + 1440) << R300_SCISSORS_Y_SHIFT);
 302         scissor->bottom_right =
 303             (((state->maxx - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 304             (((state->maxy - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 305     }
 306
 307     scissor->empty_area = state->minx >= state->maxx ||
 308                           state->miny >= state->maxy;
 309 }
 310
 311 static void
 312     r300_set_framebuffer_state(struct pipe_context* pipe,
 313                                const struct pipe_framebuffer_state* state)
 314 {
 315     struct r300_context* r300 = r300_context(pipe);
 316     struct pipe_scissor_state scissor;
 317
 318     if (r300->draw) {
 319         draw_flush(r300->draw);
 320     }
 321
 322     r300->framebuffer_state = *state;
 323
 324     scissor.minx = scissor.miny = 0;
 325     scissor.maxx = state->width;
 326     scissor.maxy = state->height;
 327     r300_set_scissor_regs(&scissor, &r300->scissor_state->framebuffer,
 328                           r300_screen(r300->context.screen)->caps->is_r500);
 329
 330     /* Don't rely on the order of states being set for the first time. */
 331     if (!r300->rs_state || !r300->rs_state->rs.scissor) {
 332         r300->dirty_state |= R300_NEW_SCISSOR;
 333     }
 334     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 335     r300->dirty_state |= R300_NEW_BLEND;
 336 }
 337
 338 /* Create fragment shader state. */
 339 static void* r300_create_fs_state(struct pipe_context* pipe,
 340                                   const struct pipe_shader_state* shader)
 341 {
 342     struct r300_fragment_shader* fs = NULL;
 343
 344     fs = (struct r300_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 345
 346     /* Copy state directly into shader. */
 347     fs->state = *shader;
 348     fs->state.tokens = tgsi_dup_tokens(shader->tokens);
 349
 350     tgsi_scan_shader(shader->tokens, &fs->info);
 351     r300_shader_read_fs_inputs(&fs->info, &fs->inputs);
 352
 353     return (void*)fs;
 354 }
 355
 356 /* Bind fragment shader state. */
 357 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 358 {
 359     struct r300_context* r300 = r300_context(pipe);
 360     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 361
 362     if (fs == NULL) {
 363         r300->fs = NULL;
 364         return;
 365     }
 366
 367     r300->fs = fs;
 368     r300_pick_fragment_shader(r300);
 369
 370     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER | R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 371 }
 372
 373 /* Delete fragment shader state. */
 374 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 375 {
 376     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 377     struct r300_fragment_shader_code *tmp, *ptr = fs->first;
 378
 379     while (ptr) {
 380         tmp = ptr;
 381         ptr = ptr->next;
 382         rc_constants_destroy(&tmp->code.constants);
 383         FREE(tmp);
 384     }
 385     FREE((void*)fs->state.tokens);
 386     FREE(shader);
 387 }
 388
 389 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 390                                      const struct pipe_poly_stipple* state)
 391 {
 392     /* XXX no idea how to set this up, but not terribly important */
 393 }
 394
 395 /* Create a new rasterizer state based on the CSO rasterizer state.
 396  *
 397  * This is a very large chunk of state, and covers most of the graphics
 398  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 399  *
 400  * In a not entirely unironic sidenote, this state has nearly nothing to do
 401  * with the actual block on the Radeon called the rasterizer (RS). */
 402 static void* r300_create_rs_state(struct pipe_context* pipe,
 403                                   const struct pipe_rasterizer_state* state)
 404 {
 405     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 406
 407     /* Copy rasterizer state for Draw. */
 408     rs->rs = *state;
 409
 410     rs->enable_vte = !state->bypass_vs_clip_and_viewport;
 411
 412 #ifdef PIPE_ARCH_LITTLE_ENDIAN
 413     rs->vap_control_status = R300_VC_NO_SWAP;
 414 #else
 415     rs->vap_control_status = R300_VC_32BIT_SWAP;
 416 #endif
 417
 418     /* If bypassing TCL, or if no TCL engine is present, turn off the HW TCL.
 419      * Else, enable HW TCL and force Draw's TCL off. */
 420     if (state->bypass_vs_clip_and_viewport ||
 421             !r300_screen(pipe->screen)->caps->has_tcl) {
 422         rs->vap_control_status |= R300_VAP_TCL_BYPASS;
 423     }
 424
 425     rs->point_size = pack_float_16_6x(state->point_size) |
 426         (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);
 427
 428     rs->point_minmax =
 429         ((int)(state->point_size_min * 6.0) <<
 430          R300_GA_POINT_MINMAX_MIN_SHIFT) |
 431         ((int)(state->point_size_max * 6.0) <<
 432          R300_GA_POINT_MINMAX_MAX_SHIFT);
 433
 434     rs->line_control = pack_float_16_6x(state->line_width) |
 435         R300_GA_LINE_CNTL_END_TYPE_COMP;
 436
 437     /* XXX I think there is something wrong with the polygon mode,
 438      * XXX re-test when r300g is in a better shape */
 439
 440     /* Enable polygon mode */
 441     if (state->fill_cw != PIPE_POLYGON_MODE_FILL ||
 442         state->fill_ccw != PIPE_POLYGON_MODE_FILL) {
 443         rs->polygon_mode = R300_GA_POLY_MODE_DUAL;
 444     }
 445
 446     /* Radeons don't think in "CW/CCW", they think in "front/back". */
 447     if (state->front_winding == PIPE_WINDING_CW) {
 448         rs->cull_mode = R300_FRONT_FACE_CW;
 449
 450         /* Polygon offset */
 451         if (state->offset_cw) {
 452             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 453         }
 454         if (state->offset_ccw) {
 455             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 456         }
 457
 458         /* Polygon mode */
 459         if (rs->polygon_mode) {
 460             rs->polygon_mode |=
 461                 r300_translate_polygon_mode_front(state->fill_cw);
 462             rs->polygon_mode |=
 463                 r300_translate_polygon_mode_back(state->fill_ccw);
 464         }
 465     } else {
 466         rs->cull_mode = R300_FRONT_FACE_CCW;
 467
 468         /* Polygon offset */
 469         if (state->offset_ccw) {
 470             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 471         }
 472         if (state->offset_cw) {
 473             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 474         }
 475
 476         /* Polygon mode */
 477         if (rs->polygon_mode) {
 478             rs->polygon_mode |=
 479                 r300_translate_polygon_mode_front(state->fill_ccw);
 480             rs->polygon_mode |=
 481                 r300_translate_polygon_mode_back(state->fill_cw);
 482         }
 483     }
 484     if (state->front_winding & state->cull_mode) {
 485         rs->cull_mode |= R300_CULL_FRONT;
 486     }
 487     if (~(state->front_winding) & state->cull_mode) {
 488         rs->cull_mode |= R300_CULL_BACK;
 489     }
 490
 491     if (rs->polygon_offset_enable) {
 492         rs->depth_offset_front = rs->depth_offset_back =
 493             fui(state->offset_units);
 494         rs->depth_scale_front = rs->depth_scale_back =
 495             fui(state->offset_scale);
 496     }
 497
 498     if (state->line_stipple_enable) {
 499         rs->line_stipple_config =
 500             R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
 501             (fui((float)state->line_stipple_factor) &
 502                 R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
 503         /* XXX this might need to be scaled up */
 504         rs->line_stipple_value = state->line_stipple_pattern;
 505     }
 506
 507     if (state->flatshade) {
 508         rs->color_control = R300_SHADE_MODEL_FLAT;
 509     } else {
 510         rs->color_control = R300_SHADE_MODEL_SMOOTH;
 511     }
 512
 513     return (void*)rs;
 514 }
 515
 516 /* Bind rasterizer state. */
 517 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 518 {
 519     struct r300_context* r300 = r300_context(pipe);
 520     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 521
 522     if (r300->draw) {
 523         draw_flush(r300->draw);
 524         draw_set_rasterizer_state(r300->draw, &rs->rs);
 525     }
 526
 527     r300->rs_state = rs;
 528     /* XXX Clean these up when we move to atom emits */
 529     r300->dirty_state |= R300_NEW_RASTERIZER;
 530     r300->dirty_state |= R300_NEW_RS_BLOCK;
 531     r300->dirty_state |= R300_NEW_SCISSOR;
 532     r300->dirty_state |= R300_NEW_VIEWPORT;
 533 }
 534
 535 /* Free rasterizer state. */
 536 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 537 {
 538     FREE(state);
 539 }
 540
 541 static void*
 542         r300_create_sampler_state(struct pipe_context* pipe,
 543                                   const struct pipe_sampler_state* state)
 544 {
 545     struct r300_context* r300 = r300_context(pipe);
 546     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 547     int lod_bias;
 548     union util_color uc;
 549
 550     sampler->state = *state;
 551
 552     sampler->filter0 |=
 553         (r300_translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 554         (r300_translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 555         (r300_translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 556
 557     sampler->filter0 |= r300_translate_tex_filters(state->min_img_filter,
 558                                                    state->mag_img_filter,
 559                                                    state->min_mip_filter,
 560                                                    state->max_anisotropy > 1.0);
 561
 562     /* Unfortunately, r300-r500 don't support floating-point mipmap lods. */
 563     /* We must pass these to the emit function to clamp them properly. */
 564     sampler->min_lod = MAX2((unsigned)state->min_lod, 0);
 565     sampler->max_lod = MAX2((unsigned)ceilf(state->max_lod), 0);
 566
 567     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 568
 569     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 570
 571     sampler->filter1 |= r300_anisotropy(state->max_anisotropy);
 572
 573     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM, &uc);
 574     sampler->border_color = uc.ui;
 575
 576     /* R500-specific fixups and optimizations */
 577     if (r300_screen(r300->context.screen)->caps->is_r500) {
 578         sampler->filter1 |= R500_BORDER_FIX;
 579     }
 580
 581     return (void*)sampler;
 582 }
 583
 584 static void r300_bind_sampler_states(struct pipe_context* pipe,
 585                                      unsigned count,
 586                                      void** states)
 587 {
 588     struct r300_context* r300 = r300_context(pipe);
 589     int i;
 590
 591     if (count > 8) {
 592         return;
 593     }
 594
 595     for (i = 0; i < count; i++) {
 596         if (r300->sampler_states[i] != states[i]) {
 597             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 598             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 599         }
 600     }
 601
 602     r300->sampler_count = count;
 603
 604     /* Pick a fragment shader based on the texture compare state. */
 605     if (r300->fs && (r300->dirty_state & R300_ANY_NEW_SAMPLERS)) {
 606         if (r300_pick_fragment_shader(r300)) {
 607             r300->dirty_state |= R300_NEW_FRAGMENT_SHADER |
 608                                  R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 609         }
 610     }
 611 }
 612
 613 static void r300_lacks_vertex_textures(struct pipe_context* pipe,
 614                                        unsigned count,
 615                                        void** states)
 616 {
 617 }
 618
 619 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 620 {
 621     FREE(state);
 622 }
 623
 624 static void r300_set_sampler_textures(struct pipe_context* pipe,
 625                                       unsigned count,
 626                                       struct pipe_texture** texture)
 627 {
 628     struct r300_context* r300 = r300_context(pipe);
 629     boolean is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
 630     int i;
 631
 632     /* XXX magic num */
 633     if (count > 8) {
 634         return;
 635     }
 636
 637     for (i = 0; i < count; i++) {
 638         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 639             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 640                 texture[i]);
 641             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 642
 643             /* R300-specific - set the texrect factor in a fragment shader */
 644             if (!is_r500 && r300->textures[i]->is_npot) {
 645                 /* XXX It would be nice to re-emit just 1 constant,
 646                  * XXX not all of them */
 647                 r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 648             }
 649         }
 650     }
 651
 652     for (i = count; i < 8; i++) {
 653         if (r300->textures[i]) {
 654             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 655                 NULL);
 656             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 657         }
 658     }
 659
 660     r300->texture_count = count;
 661 }
 662
 663 static void r300_set_scissor_state(struct pipe_context* pipe,
 664                                    const struct pipe_scissor_state* state)
 665 {
 666     struct r300_context* r300 = r300_context(pipe);
 667
 668     r300_set_scissor_regs(state, &r300->scissor_state->scissor,
 669                           r300_screen(r300->context.screen)->caps->is_r500);
 670
 671     /* Don't rely on the order of states being set for the first time. */
 672     if (!r300->rs_state || r300->rs_state->rs.scissor) {
 673         r300->dirty_state |= R300_NEW_SCISSOR;
 674     }
 675 }
 676
 677 static void r300_set_viewport_state(struct pipe_context* pipe,
 678                                     const struct pipe_viewport_state* state)
 679 {
 680     struct r300_context* r300 = r300_context(pipe);
 681
 682     /* Do the transform in HW. */
 683     r300->viewport_state->vte_control = R300_VTX_W0_FMT;
 684
 685     if (state->scale[0] != 1.0f) {
 686         r300->viewport_state->xscale = state->scale[0];
 687         r300->viewport_state->vte_control |= R300_VPORT_X_SCALE_ENA;
 688     }
 689     if (state->scale[1] != 1.0f) {
 690         r300->viewport_state->yscale = state->scale[1];
 691         r300->viewport_state->vte_control |= R300_VPORT_Y_SCALE_ENA;
 692     }
 693     if (state->scale[2] != 1.0f) {
 694         r300->viewport_state->zscale = state->scale[2];
 695         r300->viewport_state->vte_control |= R300_VPORT_Z_SCALE_ENA;
 696     }
 697     if (state->translate[0] != 0.0f) {
 698         r300->viewport_state->xoffset = state->translate[0];
 699         r300->viewport_state->vte_control |= R300_VPORT_X_OFFSET_ENA;
 700     }
 701     if (state->translate[1] != 0.0f) {
 702         r300->viewport_state->yoffset = state->translate[1];
 703         r300->viewport_state->vte_control |= R300_VPORT_Y_OFFSET_ENA;
 704     }
 705     if (state->translate[2] != 0.0f) {
 706         r300->viewport_state->zoffset = state->translate[2];
 707         r300->viewport_state->vte_control |= R300_VPORT_Z_OFFSET_ENA;
 708     }
 709
 710     r300->dirty_state |= R300_NEW_VIEWPORT;
 711 }
 712
 713 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 714                                     unsigned count,
 715                                     const struct pipe_vertex_buffer* buffers)
 716 {
 717     struct r300_context* r300 = r300_context(pipe);
 718
 719     memcpy(r300->vertex_buffer, buffers,
 720         sizeof(struct pipe_vertex_buffer) * count);
 721     r300->vertex_buffer_count = count;
 722
 723     if (r300->draw) {
 724         draw_flush(r300->draw);
 725         draw_set_vertex_buffers(r300->draw, count, buffers);
 726     }
 727
 728     r300->dirty_state |= R300_NEW_VERTEX_FORMAT;
 729 }
 730
 731 static void r300_set_vertex_elements(struct pipe_context* pipe,
 732                                     unsigned count,
 733                                     const struct pipe_vertex_element* elements)
 734 {
 735     struct r300_context* r300 = r300_context(pipe);
 736
 737     memcpy(r300->vertex_element,
 738            elements,
 739            sizeof(struct pipe_vertex_element) * count);
 740     r300->vertex_element_count = count;
 741
 742     if (r300->draw) {
 743         draw_flush(r300->draw);
 744         draw_set_vertex_elements(r300->draw, count, elements);
 745     }
 746 }
 747
 748 static void* r300_create_vs_state(struct pipe_context* pipe,
 749                                   const struct pipe_shader_state* shader)
 750 {
 751     struct r300_context* r300 = r300_context(pipe);
 752
 753     if (r300_screen(pipe->screen)->caps->has_tcl) {
 754         struct r300_vertex_shader* vs = CALLOC_STRUCT(r300_vertex_shader);
 755         /* Copy state directly into shader. */
 756         vs->state = *shader;
 757         vs->state.tokens = tgsi_dup_tokens(shader->tokens);
 758
 759         tgsi_scan_shader(shader->tokens, &vs->info);
 760
 761         return (void*)vs;
 762     } else {
 763         return draw_create_vertex_shader(r300->draw, shader);
 764     }
 765 }
 766
 767 static void r300_bind_vs_state(struct pipe_context* pipe, void* shader)
 768 {
 769     struct r300_context* r300 = r300_context(pipe);
 770
 771     if (r300_screen(pipe->screen)->caps->has_tcl) {
 772         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 773
 774         if (vs == NULL) {
 775             r300->vs = NULL;
 776             return;
 777         } else if (!vs->translated) {
 778             r300_translate_vertex_shader(r300, vs);
 779         }
 780
 781         r300->vs = vs;
 782         r300->dirty_state |= R300_NEW_VERTEX_SHADER | R300_NEW_VERTEX_SHADER_CONSTANTS;
 783     } else {
 784         draw_flush(r300->draw);
 785         draw_bind_vertex_shader(r300->draw,
 786                 (struct draw_vertex_shader*)shader);
 787     }
 788 }
 789
 790 static void r300_delete_vs_state(struct pipe_context* pipe, void* shader)
 791 {
 792     struct r300_context* r300 = r300_context(pipe);
 793
 794     if (r300_screen(pipe->screen)->caps->has_tcl) {
 795         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 796
 797         rc_constants_destroy(&vs->code.constants);
 798         FREE((void*)vs->state.tokens);
 799         FREE(shader);
 800     } else {
 801         draw_delete_vertex_shader(r300->draw,
 802                 (struct draw_vertex_shader*)shader);
 803     }
 804 }
 805
 806 static void r300_set_constant_buffer(struct pipe_context *pipe,
 807                                      uint shader, uint index,
 808                                      const struct pipe_constant_buffer *buf)
 809 {
 810     struct r300_context* r300 = r300_context(pipe);
 811     void *mapped;
 812
 813     if (buf == NULL || buf->buffer->size == 0 ||
 814         (mapped = pipe_buffer_map(pipe->screen, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)) == NULL)
 815     {
 816         r300->shader_constants[shader].count = 0;
 817         return;
 818     }
 819
 820     assert((buf->buffer->size % 4 * sizeof(float)) == 0);
 821     memcpy(r300->shader_constants[shader].constants, mapped, buf->buffer->size);
 822     r300->shader_constants[shader].count = buf->buffer->size / (4 * sizeof(float));
 823     pipe_buffer_unmap(pipe->screen, buf->buffer);
 824
 825     if (shader == PIPE_SHADER_VERTEX)
 826         r300->dirty_state |= R300_NEW_VERTEX_SHADER_CONSTANTS;
 827     else if (shader == PIPE_SHADER_FRAGMENT)
 828         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 829 }
 830
 831 void r300_init_state_functions(struct r300_context* r300)
 832 {
 833     r300->context.create_blend_state = r300_create_blend_state;
 834     r300->context.bind_blend_state = r300_bind_blend_state;
 835     r300->context.delete_blend_state = r300_delete_blend_state;
 836
 837     r300->context.set_blend_color = r300_set_blend_color;
 838
 839     r300->context.set_clip_state = r300_set_clip_state;
 840
 841     r300->context.set_constant_buffer = r300_set_constant_buffer;
 842
 843     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 844     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 845     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 846
 847     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 848
 849     r300->context.create_fs_state = r300_create_fs_state;
 850     r300->context.bind_fs_state = r300_bind_fs_state;
 851     r300->context.delete_fs_state = r300_delete_fs_state;
 852
 853     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 854
 855     r300->context.create_rasterizer_state = r300_create_rs_state;
 856     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 857     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 858
 859     r300->context.create_sampler_state = r300_create_sampler_state;
 860     r300->context.bind_fragment_sampler_states = r300_bind_sampler_states;
 861     r300->context.bind_vertex_sampler_states = r300_lacks_vertex_textures;
 862     r300->context.delete_sampler_state = r300_delete_sampler_state;
 863
 864     r300->context.set_fragment_sampler_textures = r300_set_sampler_textures;
 865
 866     r300->context.set_scissor_state = r300_set_scissor_state;
 867
 868     r300->context.set_viewport_state = r300_set_viewport_state;
 869
 870     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 871     r300->context.set_vertex_elements = r300_set_vertex_elements;
 872
 873     r300->context.create_vs_state = r300_create_vs_state;
 874     r300->context.bind_vs_state = r300_bind_vs_state;
 875     r300->context.delete_vs_state = r300_delete_vs_state;
 876 }