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          *
  71          * When SRC_ALPHA_SATURATE is used, colorbuffer reads must be enabled,
  72          * otherwise blending gives incorrect results. It seems to be
  73          * a hardware bug. */
  74         if (eqRGB == PIPE_BLEND_MIN || eqA == PIPE_BLEND_MIN ||
  75             eqRGB == PIPE_BLEND_MAX || eqA == PIPE_BLEND_MAX ||
  76             dstRGB != PIPE_BLENDFACTOR_ZERO ||
  77             dstA != PIPE_BLENDFACTOR_ZERO ||
  78             srcRGB == PIPE_BLENDFACTOR_DST_COLOR ||
  79             srcRGB == PIPE_BLENDFACTOR_DST_ALPHA ||
  80             srcRGB == PIPE_BLENDFACTOR_INV_DST_COLOR ||
  81             srcRGB == PIPE_BLENDFACTOR_INV_DST_ALPHA ||
  82             srcA == PIPE_BLENDFACTOR_DST_COLOR ||
  83             srcA == PIPE_BLENDFACTOR_DST_ALPHA ||
  84             srcA == PIPE_BLENDFACTOR_INV_DST_COLOR ||
  85             srcA == PIPE_BLENDFACTOR_INV_DST_ALPHA ||
  86             srcRGB == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE)
  87             blend->blend_control |= R300_READ_ENABLE;
  88
  89         /* XXX implement the optimization with DISCARD_SRC_PIXELS*/
  90         /* XXX implement the optimization with SRC_ALPHA_?_NO_READ */
  91
  92         /* separate alpha */
  93         if (srcA != srcRGB || dstA != dstRGB || eqA != eqRGB) {
  94             blend->blend_control |= R300_SEPARATE_ALPHA_ENABLE;
  95             blend->alpha_blend_control =
  96                 r300_translate_blend_function(eqA) |
  97                 (r300_translate_blend_factor(srcA) << R300_SRC_BLEND_SHIFT) |
  98                 (r300_translate_blend_factor(dstA) << R300_DST_BLEND_SHIFT);
  99         }
 100     }
 101
 102     /* PIPE_LOGICOP_* don't need to be translated, fortunately. */
 103     if (state->logicop_enable) {
 104         blend->rop = R300_RB3D_ROPCNTL_ROP_ENABLE |
 105                 (state->logicop_func) << R300_RB3D_ROPCNTL_ROP_SHIFT;
 106     }
 107
 108     /* Color Channel Mask */
 109     if (state->colormask & PIPE_MASK_R) {
 110         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_RED_MASK0;
 111     }
 112     if (state->colormask & PIPE_MASK_G) {
 113         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_GREEN_MASK0;
 114     }
 115     if (state->colormask & PIPE_MASK_B) {
 116         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_BLUE_MASK0;
 117     }
 118     if (state->colormask & PIPE_MASK_A) {
 119         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_ALPHA_MASK0;
 120     }
 121
 122     if (state->dither) {
 123         blend->dither = R300_RB3D_DITHER_CTL_DITHER_MODE_LUT |
 124                 R300_RB3D_DITHER_CTL_ALPHA_DITHER_MODE_LUT;
 125     }
 126
 127     return (void*)blend;
 128 }
 129
 130 /* Bind blend state. */
 131 static void r300_bind_blend_state(struct pipe_context* pipe,
 132                                   void* state)
 133 {
 134     struct r300_context* r300 = r300_context(pipe);
 135
 136     r300->blend_state = (struct r300_blend_state*)state;
 137     r300->dirty_state |= R300_NEW_BLEND;
 138 }
 139
 140 /* Free blend state. */
 141 static void r300_delete_blend_state(struct pipe_context* pipe,
 142                                     void* state)
 143 {
 144     FREE(state);
 145 }
 146
 147 /* Convert float to 10bit integer */
 148 static unsigned float_to_fixed10(float f)
 149 {
 150     return CLAMP((unsigned)(f * 1023.9f), 0, 1023);
 151 }
 152
 153 /* Set blend color.
 154  * Setup both R300 and R500 registers, figure out later which one to write. */
 155 static void r300_set_blend_color(struct pipe_context* pipe,
 156                                  const struct pipe_blend_color* color)
 157 {
 158     struct r300_context* r300 = r300_context(pipe);
 159     union util_color uc;
 160
 161     util_pack_color(color->color, PIPE_FORMAT_A8R8G8B8_UNORM, &uc);
 162     r300->blend_color_state->blend_color = uc.ui;
 163
 164     /* XXX if FP16 blending is enabled, we should use the FP16 format */
 165     r300->blend_color_state->blend_color_red_alpha =
 166         float_to_fixed10(color->color[0]) |
 167         (float_to_fixed10(color->color[3]) << 16);
 168     r300->blend_color_state->blend_color_green_blue =
 169         float_to_fixed10(color->color[2]) |
 170         (float_to_fixed10(color->color[1]) << 16);
 171
 172     r300->dirty_state |= R300_NEW_BLEND_COLOR;
 173 }
 174
 175 static void r300_set_clip_state(struct pipe_context* pipe,
 176                                 const struct pipe_clip_state* state)
 177 {
 178     struct r300_context* r300 = r300_context(pipe);
 179
 180     if (r300_screen(pipe->screen)->caps->has_tcl) {
 181         r300->clip_state = *state;
 182         r300->dirty_state |= R300_NEW_CLIP;
 183     } else {
 184         draw_flush(r300->draw);
 185         draw_set_clip_state(r300->draw, state);
 186     }
 187 }
 188
 189 /* Create a new depth, stencil, and alpha state based on the CSO dsa state.
 190  *
 191  * This contains the depth buffer, stencil buffer, alpha test, and such.
 192  * On the Radeon, depth and stencil buffer setup are intertwined, which is
 193  * the reason for some of the strange-looking assignments across registers. */
 194 static void*
 195         r300_create_dsa_state(struct pipe_context* pipe,
 196                               const struct pipe_depth_stencil_alpha_state* state)
 197 {
 198     struct r300_capabilities *caps =
 199         r300_screen(r300_context(pipe)->context.screen)->caps;
 200     struct r300_dsa_state* dsa = CALLOC_STRUCT(r300_dsa_state);
 201
 202     /* Depth test setup. */
 203     if (state->depth.enabled) {
 204         dsa->z_buffer_control |= R300_Z_ENABLE;
 205
 206         if (state->depth.writemask) {
 207             dsa->z_buffer_control |= R300_Z_WRITE_ENABLE;
 208         }
 209
 210         dsa->z_stencil_control |=
 211             (r300_translate_depth_stencil_function(state->depth.func) <<
 212                 R300_Z_FUNC_SHIFT);
 213     }
 214
 215     /* Stencil buffer setup. */
 216     if (state->stencil[0].enabled) {
 217         dsa->z_buffer_control |= R300_STENCIL_ENABLE;
 218         dsa->z_stencil_control |=
 219             (r300_translate_depth_stencil_function(state->stencil[0].func) <<
 220                 R300_S_FRONT_FUNC_SHIFT) |
 221             (r300_translate_stencil_op(state->stencil[0].fail_op) <<
 222                 R300_S_FRONT_SFAIL_OP_SHIFT) |
 223             (r300_translate_stencil_op(state->stencil[0].zpass_op) <<
 224                 R300_S_FRONT_ZPASS_OP_SHIFT) |
 225             (r300_translate_stencil_op(state->stencil[0].zfail_op) <<
 226                 R300_S_FRONT_ZFAIL_OP_SHIFT);
 227
 228         dsa->stencil_ref_mask = (state->stencil[0].ref_value) |
 229                 (state->stencil[0].valuemask << R300_STENCILMASK_SHIFT) |
 230                 (state->stencil[0].writemask << R300_STENCILWRITEMASK_SHIFT);
 231
 232         if (state->stencil[1].enabled) {
 233             dsa->z_buffer_control |= R300_STENCIL_FRONT_BACK;
 234             dsa->z_stencil_control |=
 235             (r300_translate_depth_stencil_function(state->stencil[1].func) <<
 236                 R300_S_BACK_FUNC_SHIFT) |
 237             (r300_translate_stencil_op(state->stencil[1].fail_op) <<
 238                 R300_S_BACK_SFAIL_OP_SHIFT) |
 239             (r300_translate_stencil_op(state->stencil[1].zpass_op) <<
 240                 R300_S_BACK_ZPASS_OP_SHIFT) |
 241             (r300_translate_stencil_op(state->stencil[1].zfail_op) <<
 242                 R300_S_BACK_ZFAIL_OP_SHIFT);
 243
 244             /* XXX it seems r3xx doesn't support STENCILREFMASK_BF */
 245             if (caps->is_r500)
 246             {
 247                 dsa->z_buffer_control |= R500_STENCIL_REFMASK_FRONT_BACK;
 248                 dsa->stencil_ref_bf = (state->stencil[1].ref_value) |
 249                     (state->stencil[1].valuemask <<
 250                     R300_STENCILMASK_SHIFT) |
 251                     (state->stencil[1].writemask <<
 252                     R300_STENCILWRITEMASK_SHIFT);
 253             }
 254         }
 255     }
 256
 257     /* Alpha test setup. */
 258     if (state->alpha.enabled) {
 259         dsa->alpha_function =
 260             r300_translate_alpha_function(state->alpha.func) |
 261             R300_FG_ALPHA_FUNC_ENABLE;
 262
 263         /* XXX figure out why emitting 10bit alpha ref causes CS to dump */
 264         /* always use 8bit alpha ref */
 265         dsa->alpha_function |= float_to_ubyte(state->alpha.ref_value);
 266
 267         if (caps->is_r500)
 268             dsa->alpha_function |= R500_FG_ALPHA_FUNC_8BIT;
 269     }
 270
 271     return (void*)dsa;
 272 }
 273
 274 /* Bind DSA state. */
 275 static void r300_bind_dsa_state(struct pipe_context* pipe,
 276                                 void* state)
 277 {
 278     struct r300_context* r300 = r300_context(pipe);
 279
 280     r300->dsa_state = (struct r300_dsa_state*)state;
 281     r300->dirty_state |= R300_NEW_DSA;
 282 }
 283
 284 /* Free DSA state. */
 285 static void r300_delete_dsa_state(struct pipe_context* pipe,
 286                                   void* state)
 287 {
 288     FREE(state);
 289 }
 290
 291 static void r300_set_scissor_regs(const struct pipe_scissor_state* state,
 292                                   struct r300_scissor_regs *scissor,
 293                                   boolean is_r500)
 294 {
 295     if (is_r500) {
 296         scissor->top_left =
 297             (state->minx << R300_SCISSORS_X_SHIFT) |
 298             (state->miny << R300_SCISSORS_Y_SHIFT);
 299         scissor->bottom_right =
 300             ((state->maxx - 1) << R300_SCISSORS_X_SHIFT) |
 301             ((state->maxy - 1) << R300_SCISSORS_Y_SHIFT);
 302     } else {
 303         /* Offset of 1440 in non-R500 chipsets. */
 304         scissor->top_left =
 305             ((state->minx + 1440) << R300_SCISSORS_X_SHIFT) |
 306             ((state->miny + 1440) << R300_SCISSORS_Y_SHIFT);
 307         scissor->bottom_right =
 308             (((state->maxx - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 309             (((state->maxy - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 310     }
 311
 312     scissor->empty_area = state->minx >= state->maxx ||
 313                           state->miny >= state->maxy;
 314 }
 315
 316 static void
 317     r300_set_framebuffer_state(struct pipe_context* pipe,
 318                                const struct pipe_framebuffer_state* state)
 319 {
 320     struct r300_context* r300 = r300_context(pipe);
 321     struct pipe_scissor_state scissor;
 322
 323     if (r300->draw) {
 324         draw_flush(r300->draw);
 325     }
 326
 327     r300->framebuffer_state = *state;
 328
 329     scissor.minx = scissor.miny = 0;
 330     scissor.maxx = state->width;
 331     scissor.maxy = state->height;
 332     r300_set_scissor_regs(&scissor, &r300->scissor_state->framebuffer,
 333                           r300_screen(r300->context.screen)->caps->is_r500);
 334
 335     /* Don't rely on the order of states being set for the first time. */
 336     if (!r300->rs_state || !r300->rs_state->rs.scissor) {
 337         r300->dirty_state |= R300_NEW_SCISSOR;
 338     }
 339     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 340     r300->dirty_state |= R300_NEW_BLEND;
 341 }
 342
 343 /* Create fragment shader state. */
 344 static void* r300_create_fs_state(struct pipe_context* pipe,
 345                                   const struct pipe_shader_state* shader)
 346 {
 347     struct r300_fragment_shader* fs = NULL;
 348
 349     fs = (struct r300_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 350
 351     /* Copy state directly into shader. */
 352     fs->state = *shader;
 353     fs->state.tokens = tgsi_dup_tokens(shader->tokens);
 354
 355     tgsi_scan_shader(shader->tokens, &fs->info);
 356     r300_shader_read_fs_inputs(&fs->info, &fs->inputs);
 357
 358     return (void*)fs;
 359 }
 360
 361 /* Bind fragment shader state. */
 362 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 363 {
 364     struct r300_context* r300 = r300_context(pipe);
 365     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 366
 367     if (fs == NULL) {
 368         r300->fs = NULL;
 369         return;
 370     }
 371
 372     r300->fs = fs;
 373     r300_pick_fragment_shader(r300);
 374
 375     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER | R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 376 }
 377
 378 /* Delete fragment shader state. */
 379 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 380 {
 381     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 382     struct r300_fragment_shader_code *tmp, *ptr = fs->first;
 383
 384     while (ptr) {
 385         tmp = ptr;
 386         ptr = ptr->next;
 387         rc_constants_destroy(&tmp->code.constants);
 388         FREE(tmp);
 389     }
 390     FREE((void*)fs->state.tokens);
 391     FREE(shader);
 392 }
 393
 394 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 395                                      const struct pipe_poly_stipple* state)
 396 {
 397     /* XXX no idea how to set this up, but not terribly important */
 398 }
 399
 400 /* Create a new rasterizer state based on the CSO rasterizer state.
 401  *
 402  * This is a very large chunk of state, and covers most of the graphics
 403  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 404  *
 405  * In a not entirely unironic sidenote, this state has nearly nothing to do
 406  * with the actual block on the Radeon called the rasterizer (RS). */
 407 static void* r300_create_rs_state(struct pipe_context* pipe,
 408                                   const struct pipe_rasterizer_state* state)
 409 {
 410     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 411
 412     /* Copy rasterizer state for Draw. */
 413     rs->rs = *state;
 414
 415     rs->enable_vte = !state->bypass_vs_clip_and_viewport;
 416
 417 #ifdef PIPE_ARCH_LITTLE_ENDIAN
 418     rs->vap_control_status = R300_VC_NO_SWAP;
 419 #else
 420     rs->vap_control_status = R300_VC_32BIT_SWAP;
 421 #endif
 422
 423     /* If bypassing TCL, or if no TCL engine is present, turn off the HW TCL.
 424      * Else, enable HW TCL and force Draw's TCL off. */
 425     if (state->bypass_vs_clip_and_viewport ||
 426             !r300_screen(pipe->screen)->caps->has_tcl) {
 427         rs->vap_control_status |= R300_VAP_TCL_BYPASS;
 428     }
 429
 430     rs->point_size = pack_float_16_6x(state->point_size) |
 431         (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);
 432
 433     rs->point_minmax =
 434         ((int)(state->point_size_min * 6.0) <<
 435          R300_GA_POINT_MINMAX_MIN_SHIFT) |
 436         ((int)(state->point_size_max * 6.0) <<
 437          R300_GA_POINT_MINMAX_MAX_SHIFT);
 438
 439     rs->line_control = pack_float_16_6x(state->line_width) |
 440         R300_GA_LINE_CNTL_END_TYPE_COMP;
 441
 442     /* XXX I think there is something wrong with the polygon mode,
 443      * XXX re-test when r300g is in a better shape */
 444
 445     /* Enable polygon mode */
 446     if (state->fill_cw != PIPE_POLYGON_MODE_FILL ||
 447         state->fill_ccw != PIPE_POLYGON_MODE_FILL) {
 448         rs->polygon_mode = R300_GA_POLY_MODE_DUAL;
 449     }
 450
 451     /* Radeons don't think in "CW/CCW", they think in "front/back". */
 452     if (state->front_winding == PIPE_WINDING_CW) {
 453         rs->cull_mode = R300_FRONT_FACE_CW;
 454
 455         /* Polygon offset */
 456         if (state->offset_cw) {
 457             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 458         }
 459         if (state->offset_ccw) {
 460             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 461         }
 462
 463         /* Polygon mode */
 464         if (rs->polygon_mode) {
 465             rs->polygon_mode |=
 466                 r300_translate_polygon_mode_front(state->fill_cw);
 467             rs->polygon_mode |=
 468                 r300_translate_polygon_mode_back(state->fill_ccw);
 469         }
 470     } else {
 471         rs->cull_mode = R300_FRONT_FACE_CCW;
 472
 473         /* Polygon offset */
 474         if (state->offset_ccw) {
 475             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 476         }
 477         if (state->offset_cw) {
 478             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 479         }
 480
 481         /* Polygon mode */
 482         if (rs->polygon_mode) {
 483             rs->polygon_mode |=
 484                 r300_translate_polygon_mode_front(state->fill_ccw);
 485             rs->polygon_mode |=
 486                 r300_translate_polygon_mode_back(state->fill_cw);
 487         }
 488     }
 489     if (state->front_winding & state->cull_mode) {
 490         rs->cull_mode |= R300_CULL_FRONT;
 491     }
 492     if (~(state->front_winding) & state->cull_mode) {
 493         rs->cull_mode |= R300_CULL_BACK;
 494     }
 495
 496     if (rs->polygon_offset_enable) {
 497         rs->depth_offset_front = rs->depth_offset_back =
 498             fui(state->offset_units);
 499         rs->depth_scale_front = rs->depth_scale_back =
 500             fui(state->offset_scale);
 501     }
 502
 503     if (state->line_stipple_enable) {
 504         rs->line_stipple_config =
 505             R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
 506             (fui((float)state->line_stipple_factor) &
 507                 R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
 508         /* XXX this might need to be scaled up */
 509         rs->line_stipple_value = state->line_stipple_pattern;
 510     }
 511
 512     if (state->flatshade) {
 513         rs->color_control = R300_SHADE_MODEL_FLAT;
 514     } else {
 515         rs->color_control = R300_SHADE_MODEL_SMOOTH;
 516     }
 517
 518     return (void*)rs;
 519 }
 520
 521 /* Bind rasterizer state. */
 522 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 523 {
 524     struct r300_context* r300 = r300_context(pipe);
 525     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 526
 527     if (r300->draw) {
 528         draw_flush(r300->draw);
 529         draw_set_rasterizer_state(r300->draw, &rs->rs);
 530     }
 531
 532     r300->rs_state = rs;
 533     /* XXX Clean these up when we move to atom emits */
 534     r300->dirty_state |= R300_NEW_RASTERIZER;
 535     r300->dirty_state |= R300_NEW_RS_BLOCK;
 536     r300->dirty_state |= R300_NEW_SCISSOR;
 537     r300->dirty_state |= R300_NEW_VIEWPORT;
 538 }
 539
 540 /* Free rasterizer state. */
 541 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 542 {
 543     FREE(state);
 544 }
 545
 546 static void*
 547         r300_create_sampler_state(struct pipe_context* pipe,
 548                                   const struct pipe_sampler_state* state)
 549 {
 550     struct r300_context* r300 = r300_context(pipe);
 551     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 552     int lod_bias;
 553     union util_color uc;
 554
 555     sampler->state = *state;
 556
 557     sampler->filter0 |=
 558         (r300_translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 559         (r300_translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 560         (r300_translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 561
 562     sampler->filter0 |= r300_translate_tex_filters(state->min_img_filter,
 563                                                    state->mag_img_filter,
 564                                                    state->min_mip_filter,
 565                                                    state->max_anisotropy > 1.0);
 566
 567     /* Unfortunately, r300-r500 don't support floating-point mipmap lods. */
 568     /* We must pass these to the emit function to clamp them properly. */
 569     sampler->min_lod = MAX2((unsigned)state->min_lod, 0);
 570     sampler->max_lod = MAX2((unsigned)ceilf(state->max_lod), 0);
 571
 572     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 573
 574     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 575
 576     sampler->filter1 |= r300_anisotropy(state->max_anisotropy);
 577
 578     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM, &uc);
 579     sampler->border_color = uc.ui;
 580
 581     /* R500-specific fixups and optimizations */
 582     if (r300_screen(r300->context.screen)->caps->is_r500) {
 583         sampler->filter1 |= R500_BORDER_FIX;
 584     }
 585
 586     return (void*)sampler;
 587 }
 588
 589 static void r300_bind_sampler_states(struct pipe_context* pipe,
 590                                      unsigned count,
 591                                      void** states)
 592 {
 593     struct r300_context* r300 = r300_context(pipe);
 594     int i;
 595
 596     if (count > 8) {
 597         return;
 598     }
 599
 600     for (i = 0; i < count; i++) {
 601         if (r300->sampler_states[i] != states[i]) {
 602             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 603             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 604         }
 605     }
 606
 607     r300->sampler_count = count;
 608
 609     /* Pick a fragment shader based on the texture compare state. */
 610     if (r300->fs && (r300->dirty_state & R300_ANY_NEW_SAMPLERS)) {
 611         if (r300_pick_fragment_shader(r300)) {
 612             r300->dirty_state |= R300_NEW_FRAGMENT_SHADER |
 613                                  R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 614         }
 615     }
 616 }
 617
 618 static void r300_lacks_vertex_textures(struct pipe_context* pipe,
 619                                        unsigned count,
 620                                        void** states)
 621 {
 622 }
 623
 624 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 625 {
 626     FREE(state);
 627 }
 628
 629 static void r300_set_sampler_textures(struct pipe_context* pipe,
 630                                       unsigned count,
 631                                       struct pipe_texture** texture)
 632 {
 633     struct r300_context* r300 = r300_context(pipe);
 634     boolean is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
 635     int i;
 636
 637     /* XXX magic num */
 638     if (count > 8) {
 639         return;
 640     }
 641
 642     for (i = 0; i < count; i++) {
 643         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 644             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 645                 texture[i]);
 646             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 647
 648             /* R300-specific - set the texrect factor in a fragment shader */
 649             if (!is_r500 && r300->textures[i]->is_npot) {
 650                 /* XXX It would be nice to re-emit just 1 constant,
 651                  * XXX not all of them */
 652                 r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 653             }
 654         }
 655     }
 656
 657     for (i = count; i < 8; i++) {
 658         if (r300->textures[i]) {
 659             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 660                 NULL);
 661             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 662         }
 663     }
 664
 665     r300->texture_count = count;
 666 }
 667
 668 static void r300_set_scissor_state(struct pipe_context* pipe,
 669                                    const struct pipe_scissor_state* state)
 670 {
 671     struct r300_context* r300 = r300_context(pipe);
 672
 673     r300_set_scissor_regs(state, &r300->scissor_state->scissor,
 674                           r300_screen(r300->context.screen)->caps->is_r500);
 675
 676     /* Don't rely on the order of states being set for the first time. */
 677     if (!r300->rs_state || r300->rs_state->rs.scissor) {
 678         r300->dirty_state |= R300_NEW_SCISSOR;
 679     }
 680 }
 681
 682 static void r300_set_viewport_state(struct pipe_context* pipe,
 683                                     const struct pipe_viewport_state* state)
 684 {
 685     struct r300_context* r300 = r300_context(pipe);
 686
 687     /* Do the transform in HW. */
 688     r300->viewport_state->vte_control = R300_VTX_W0_FMT;
 689
 690     if (state->scale[0] != 1.0f) {
 691         r300->viewport_state->xscale = state->scale[0];
 692         r300->viewport_state->vte_control |= R300_VPORT_X_SCALE_ENA;
 693     }
 694     if (state->scale[1] != 1.0f) {
 695         r300->viewport_state->yscale = state->scale[1];
 696         r300->viewport_state->vte_control |= R300_VPORT_Y_SCALE_ENA;
 697     }
 698     if (state->scale[2] != 1.0f) {
 699         r300->viewport_state->zscale = state->scale[2];
 700         r300->viewport_state->vte_control |= R300_VPORT_Z_SCALE_ENA;
 701     }
 702     if (state->translate[0] != 0.0f) {
 703         r300->viewport_state->xoffset = state->translate[0];
 704         r300->viewport_state->vte_control |= R300_VPORT_X_OFFSET_ENA;
 705     }
 706     if (state->translate[1] != 0.0f) {
 707         r300->viewport_state->yoffset = state->translate[1];
 708         r300->viewport_state->vte_control |= R300_VPORT_Y_OFFSET_ENA;
 709     }
 710     if (state->translate[2] != 0.0f) {
 711         r300->viewport_state->zoffset = state->translate[2];
 712         r300->viewport_state->vte_control |= R300_VPORT_Z_OFFSET_ENA;
 713     }
 714
 715     r300->dirty_state |= R300_NEW_VIEWPORT;
 716 }
 717
 718 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 719                                     unsigned count,
 720                                     const struct pipe_vertex_buffer* buffers)
 721 {
 722     struct r300_context* r300 = r300_context(pipe);
 723
 724     memcpy(r300->vertex_buffer, buffers,
 725         sizeof(struct pipe_vertex_buffer) * count);
 726     r300->vertex_buffer_count = count;
 727
 728     if (r300->draw) {
 729         draw_flush(r300->draw);
 730         draw_set_vertex_buffers(r300->draw, count, buffers);
 731     }
 732
 733     r300->dirty_state |= R300_NEW_VERTEX_FORMAT;
 734 }
 735
 736 static void r300_set_vertex_elements(struct pipe_context* pipe,
 737                                     unsigned count,
 738                                     const struct pipe_vertex_element* elements)
 739 {
 740     struct r300_context* r300 = r300_context(pipe);
 741
 742     memcpy(r300->vertex_element,
 743            elements,
 744            sizeof(struct pipe_vertex_element) * count);
 745     r300->vertex_element_count = count;
 746
 747     if (r300->draw) {
 748         draw_flush(r300->draw);
 749         draw_set_vertex_elements(r300->draw, count, elements);
 750     }
 751 }
 752
 753 static void* r300_create_vs_state(struct pipe_context* pipe,
 754                                   const struct pipe_shader_state* shader)
 755 {
 756     struct r300_context* r300 = r300_context(pipe);
 757
 758     if (r300_screen(pipe->screen)->caps->has_tcl) {
 759         struct r300_vertex_shader* vs = CALLOC_STRUCT(r300_vertex_shader);
 760         /* Copy state directly into shader. */
 761         vs->state = *shader;
 762         vs->state.tokens = tgsi_dup_tokens(shader->tokens);
 763
 764         tgsi_scan_shader(shader->tokens, &vs->info);
 765
 766         return (void*)vs;
 767     } else {
 768         return draw_create_vertex_shader(r300->draw, shader);
 769     }
 770 }
 771
 772 static void r300_bind_vs_state(struct pipe_context* pipe, void* shader)
 773 {
 774     struct r300_context* r300 = r300_context(pipe);
 775
 776     if (r300_screen(pipe->screen)->caps->has_tcl) {
 777         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 778
 779         if (vs == NULL) {
 780             r300->vs = NULL;
 781             return;
 782         } else if (!vs->translated) {
 783             r300_translate_vertex_shader(r300, vs);
 784         }
 785
 786         r300->vs = vs;
 787         r300->dirty_state |= R300_NEW_VERTEX_SHADER | R300_NEW_VERTEX_SHADER_CONSTANTS;
 788     } else {
 789         draw_flush(r300->draw);
 790         draw_bind_vertex_shader(r300->draw,
 791                 (struct draw_vertex_shader*)shader);
 792     }
 793 }
 794
 795 static void r300_delete_vs_state(struct pipe_context* pipe, void* shader)
 796 {
 797     struct r300_context* r300 = r300_context(pipe);
 798
 799     if (r300_screen(pipe->screen)->caps->has_tcl) {
 800         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 801
 802         rc_constants_destroy(&vs->code.constants);
 803         FREE((void*)vs->state.tokens);
 804         FREE(shader);
 805     } else {
 806         draw_delete_vertex_shader(r300->draw,
 807                 (struct draw_vertex_shader*)shader);
 808     }
 809 }
 810
 811 static void r300_set_constant_buffer(struct pipe_context *pipe,
 812                                      uint shader, uint index,
 813                                      const struct pipe_constant_buffer *buf)
 814 {
 815     struct r300_context* r300 = r300_context(pipe);
 816     void *mapped;
 817
 818     if (buf == NULL || buf->buffer->size == 0 ||
 819         (mapped = pipe_buffer_map(pipe->screen, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)) == NULL)
 820     {
 821         r300->shader_constants[shader].count = 0;
 822         return;
 823     }
 824
 825     assert((buf->buffer->size % 4 * sizeof(float)) == 0);
 826     memcpy(r300->shader_constants[shader].constants, mapped, buf->buffer->size);
 827     r300->shader_constants[shader].count = buf->buffer->size / (4 * sizeof(float));
 828     pipe_buffer_unmap(pipe->screen, buf->buffer);
 829
 830     if (shader == PIPE_SHADER_VERTEX)
 831         r300->dirty_state |= R300_NEW_VERTEX_SHADER_CONSTANTS;
 832     else if (shader == PIPE_SHADER_FRAGMENT)
 833         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 834 }
 835
 836 void r300_init_state_functions(struct r300_context* r300)
 837 {
 838     r300->context.create_blend_state = r300_create_blend_state;
 839     r300->context.bind_blend_state = r300_bind_blend_state;
 840     r300->context.delete_blend_state = r300_delete_blend_state;
 841
 842     r300->context.set_blend_color = r300_set_blend_color;
 843
 844     r300->context.set_clip_state = r300_set_clip_state;
 845
 846     r300->context.set_constant_buffer = r300_set_constant_buffer;
 847
 848     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 849     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 850     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 851
 852     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 853
 854     r300->context.create_fs_state = r300_create_fs_state;
 855     r300->context.bind_fs_state = r300_bind_fs_state;
 856     r300->context.delete_fs_state = r300_delete_fs_state;
 857
 858     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 859
 860     r300->context.create_rasterizer_state = r300_create_rs_state;
 861     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 862     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 863
 864     r300->context.create_sampler_state = r300_create_sampler_state;
 865     r300->context.bind_fragment_sampler_states = r300_bind_sampler_states;
 866     r300->context.bind_vertex_sampler_states = r300_lacks_vertex_textures;
 867     r300->context.delete_sampler_state = r300_delete_sampler_state;
 868
 869     r300->context.set_fragment_sampler_textures = r300_set_sampler_textures;
 870
 871     r300->context.set_scissor_state = r300_set_scissor_state;
 872
 873     r300->context.set_viewport_state = r300_set_viewport_state;
 874
 875     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 876     r300->context.set_vertex_elements = r300_set_vertex_elements;
 877
 878     r300->context.create_vs_state = r300_create_vs_state;
 879     r300->context.bind_vs_state = r300_bind_vs_state;
 880     r300->context.delete_vs_state = r300_delete_vs_state;
 881 }