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     if (state->dither) {
 104         blend->dither = R300_RB3D_DITHER_CTL_DITHER_MODE_LUT |
 105                 R300_RB3D_DITHER_CTL_ALPHA_DITHER_MODE_LUT;
 106     }
 107
 108     return (void*)blend;
 109 }
 110
 111 /* Bind blend state. */
 112 static void r300_bind_blend_state(struct pipe_context* pipe,
 113                                   void* state)
 114 {
 115     struct r300_context* r300 = r300_context(pipe);
 116
 117     r300->blend_state = (struct r300_blend_state*)state;
 118     r300->dirty_state |= R300_NEW_BLEND;
 119 }
 120
 121 /* Free blend state. */
 122 static void r300_delete_blend_state(struct pipe_context* pipe,
 123                                     void* state)
 124 {
 125     FREE(state);
 126 }
 127
 128 /* Convert float to 10bit integer */
 129 static unsigned float_to_fixed10(float f)
 130 {
 131     return CLAMP((unsigned)(f * 1023.9f), 0, 1023);
 132 }
 133
 134 /* Set blend color.
 135  * Setup both R300 and R500 registers, figure out later which one to write. */
 136 static void r300_set_blend_color(struct pipe_context* pipe,
 137                                  const struct pipe_blend_color* color)
 138 {
 139     struct r300_context* r300 = r300_context(pipe);
 140
 141     util_pack_color(color->color, PIPE_FORMAT_A8R8G8B8_UNORM,
 142             &r300->blend_color_state->blend_color);
 143
 144     /* XXX if FP16 blending is enabled, we should use the FP16 format */
 145     r300->blend_color_state->blend_color_red_alpha =
 146         float_to_fixed10(color->color[0]) |
 147         (float_to_fixed10(color->color[3]) << 16);
 148     r300->blend_color_state->blend_color_green_blue =
 149         float_to_fixed10(color->color[2]) |
 150         (float_to_fixed10(color->color[1]) << 16);
 151
 152     r300->dirty_state |= R300_NEW_BLEND_COLOR;
 153 }
 154
 155 static void r300_set_clip_state(struct pipe_context* pipe,
 156                                 const struct pipe_clip_state* state)
 157 {
 158     struct r300_context* r300 = r300_context(pipe);
 159
 160     if (r300_screen(pipe->screen)->caps->has_tcl) {
 161         r300->clip_state = *state;
 162         r300->dirty_state |= R300_NEW_CLIP;
 163     } else {
 164         draw_flush(r300->draw);
 165         draw_set_clip_state(r300->draw, state);
 166     }
 167 }
 168
 169 /* Create a new depth, stencil, and alpha state based on the CSO dsa state.
 170  *
 171  * This contains the depth buffer, stencil buffer, alpha test, and such.
 172  * On the Radeon, depth and stencil buffer setup are intertwined, which is
 173  * the reason for some of the strange-looking assignments across registers. */
 174 static void*
 175         r300_create_dsa_state(struct pipe_context* pipe,
 176                               const struct pipe_depth_stencil_alpha_state* state)
 177 {
 178     struct r300_capabilities *caps =
 179         r300_screen(r300_context(pipe)->context.screen)->caps;
 180     struct r300_dsa_state* dsa = CALLOC_STRUCT(r300_dsa_state);
 181
 182     /* Depth test setup. */
 183     if (state->depth.enabled) {
 184         dsa->z_buffer_control |= R300_Z_ENABLE;
 185
 186         if (state->depth.writemask) {
 187             dsa->z_buffer_control |= R300_Z_WRITE_ENABLE;
 188         }
 189
 190         dsa->z_stencil_control |=
 191             (r300_translate_depth_stencil_function(state->depth.func) <<
 192                 R300_Z_FUNC_SHIFT);
 193     }
 194
 195     /* Stencil buffer setup. */
 196     if (state->stencil[0].enabled) {
 197         dsa->z_buffer_control |= R300_STENCIL_ENABLE;
 198         dsa->z_stencil_control |=
 199             (r300_translate_depth_stencil_function(state->stencil[0].func) <<
 200                 R300_S_FRONT_FUNC_SHIFT) |
 201             (r300_translate_stencil_op(state->stencil[0].fail_op) <<
 202                 R300_S_FRONT_SFAIL_OP_SHIFT) |
 203             (r300_translate_stencil_op(state->stencil[0].zpass_op) <<
 204                 R300_S_FRONT_ZPASS_OP_SHIFT) |
 205             (r300_translate_stencil_op(state->stencil[0].zfail_op) <<
 206                 R300_S_FRONT_ZFAIL_OP_SHIFT);
 207
 208         dsa->stencil_ref_mask = (state->stencil[0].ref_value) |
 209                 (state->stencil[0].valuemask << R300_STENCILMASK_SHIFT) |
 210                 (state->stencil[0].writemask << R300_STENCILWRITEMASK_SHIFT);
 211
 212         if (state->stencil[1].enabled) {
 213             dsa->z_buffer_control |= R300_STENCIL_FRONT_BACK;
 214             dsa->z_stencil_control |=
 215             (r300_translate_depth_stencil_function(state->stencil[1].func) <<
 216                 R300_S_BACK_FUNC_SHIFT) |
 217             (r300_translate_stencil_op(state->stencil[1].fail_op) <<
 218                 R300_S_BACK_SFAIL_OP_SHIFT) |
 219             (r300_translate_stencil_op(state->stencil[1].zpass_op) <<
 220                 R300_S_BACK_ZPASS_OP_SHIFT) |
 221             (r300_translate_stencil_op(state->stencil[1].zfail_op) <<
 222                 R300_S_BACK_ZFAIL_OP_SHIFT);
 223
 224             /* XXX it seems r3xx doesn't support STENCILREFMASK_BF */
 225             if (caps->is_r500)
 226             {
 227                 dsa->z_buffer_control |= R500_STENCIL_REFMASK_FRONT_BACK;
 228                 dsa->stencil_ref_bf = (state->stencil[1].ref_value) |
 229                     (state->stencil[1].valuemask <<
 230                     R300_STENCILMASK_SHIFT) |
 231                     (state->stencil[1].writemask <<
 232                     R300_STENCILWRITEMASK_SHIFT);
 233             }
 234         }
 235     }
 236
 237     /* Alpha test setup. */
 238     if (state->alpha.enabled) {
 239         dsa->alpha_function =
 240             r300_translate_alpha_function(state->alpha.func) |
 241             R300_FG_ALPHA_FUNC_ENABLE;
 242
 243         /* XXX figure out why emitting 10bit alpha ref causes CS to dump */
 244         /* always use 8bit alpha ref */
 245         dsa->alpha_function |= float_to_ubyte(state->alpha.ref_value);
 246
 247         if (caps->is_r500)
 248             dsa->alpha_function |= R500_FG_ALPHA_FUNC_8BIT;
 249     }
 250
 251     return (void*)dsa;
 252 }
 253
 254 /* Bind DSA state. */
 255 static void r300_bind_dsa_state(struct pipe_context* pipe,
 256                                 void* state)
 257 {
 258     struct r300_context* r300 = r300_context(pipe);
 259
 260     r300->dsa_state = (struct r300_dsa_state*)state;
 261     r300->dirty_state |= R300_NEW_DSA;
 262 }
 263
 264 /* Free DSA state. */
 265 static void r300_delete_dsa_state(struct pipe_context* pipe,
 266                                   void* state)
 267 {
 268     FREE(state);
 269 }
 270
 271 static void r300_set_edgeflags(struct pipe_context* pipe,
 272                                const unsigned* bitfield)
 273 {
 274     /* XXX you know it's bad when i915 has this blank too */
 275     /* XXX and even worse, I have no idea WTF the bitfield is */
 276 }
 277
 278 static void
 279     r300_set_framebuffer_state(struct pipe_context* pipe,
 280                                const struct pipe_framebuffer_state* state)
 281 {
 282     struct r300_context* r300 = r300_context(pipe);
 283
 284     draw_flush(r300->draw);
 285
 286     r300->framebuffer_state = *state;
 287
 288     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 289 }
 290
 291 /* Create fragment shader state. */
 292 static void* r300_create_fs_state(struct pipe_context* pipe,
 293                                   const struct pipe_shader_state* shader)
 294 {
 295     struct r300_fragment_shader* fs = NULL;
 296
 297     fs = (struct r300_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 298
 299     /* Copy state directly into shader. */
 300     fs->state = *shader;
 301     fs->state.tokens = tgsi_dup_tokens(shader->tokens);
 302
 303     tgsi_scan_shader(shader->tokens, &fs->info);
 304
 305     return (void*)fs;
 306 }
 307
 308 /* Bind fragment shader state. */
 309 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 310 {
 311     struct r300_context* r300 = r300_context(pipe);
 312     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 313
 314     if (fs == NULL) {
 315         r300->fs = NULL;
 316         return;
 317     } else if (!fs->translated) {
 318         r300_translate_fragment_shader(r300, fs);
 319     }
 320
 321     r300->fs = fs;
 322
 323     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER | R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 324 }
 325
 326 /* Delete fragment shader state. */
 327 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 328 {
 329     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 330     rc_constants_destroy(&fs->code.constants);
 331     FREE((void*)fs->state.tokens);
 332     FREE(shader);
 333 }
 334
 335 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 336                                      const struct pipe_poly_stipple* state)
 337 {
 338     /* XXX no idea how to set this up, but not terribly important */
 339 }
 340
 341 /* Create a new rasterizer state based on the CSO rasterizer state.
 342  *
 343  * This is a very large chunk of state, and covers most of the graphics
 344  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 345  *
 346  * In a not entirely unironic sidenote, this state has nearly nothing to do
 347  * with the actual block on the Radeon called the rasterizer (RS). */
 348 static void* r300_create_rs_state(struct pipe_context* pipe,
 349                                   const struct pipe_rasterizer_state* state)
 350 {
 351     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 352
 353     /* Copy rasterizer state for Draw. */
 354     rs->rs = *state;
 355
 356     rs->enable_vte = !state->bypass_vs_clip_and_viewport;
 357
 358 #ifdef PIPE_ARCH_LITTLE_ENDIAN
 359     rs->vap_control_status = R300_VC_NO_SWAP;
 360 #else
 361     rs->vap_control_status = R300_VC_32BIT_SWAP;
 362 #endif
 363
 364     /* If bypassing TCL, or if no TCL engine is present, turn off the HW TCL.
 365      * Else, enable HW TCL and force Draw's TCL off. */
 366     if (state->bypass_vs_clip_and_viewport ||
 367             !r300_screen(pipe->screen)->caps->has_tcl) {
 368         rs->vap_control_status |= R300_VAP_TCL_BYPASS;
 369     } else {
 370         rs->rs.bypass_vs_clip_and_viewport = TRUE;
 371     }
 372
 373     rs->point_size = pack_float_16_6x(state->point_size) |
 374         (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);
 375
 376     rs->point_minmax =
 377         ((int)(state->point_size_min * 6.0) <<
 378          R300_GA_POINT_MINMAX_MIN_SHIFT) |
 379         ((int)(state->point_size_max * 6.0) <<
 380          R300_GA_POINT_MINMAX_MAX_SHIFT);
 381
 382     rs->line_control = pack_float_16_6x(state->line_width) |
 383         R300_GA_LINE_CNTL_END_TYPE_COMP;
 384
 385     /* Radeons don't think in "CW/CCW", they think in "front/back". */
 386     if (state->front_winding == PIPE_WINDING_CW) {
 387         rs->cull_mode = R300_FRONT_FACE_CW;
 388
 389         if (state->offset_cw) {
 390             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 391         }
 392         if (state->offset_ccw) {
 393             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 394         }
 395     } else {
 396         rs->cull_mode = R300_FRONT_FACE_CCW;
 397
 398         if (state->offset_ccw) {
 399             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 400         }
 401         if (state->offset_cw) {
 402             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 403         }
 404     }
 405     if (state->front_winding & state->cull_mode) {
 406         rs->cull_mode |= R300_CULL_FRONT;
 407     }
 408     if (~(state->front_winding) & state->cull_mode) {
 409         rs->cull_mode |= R300_CULL_BACK;
 410     }
 411
 412     if (rs->polygon_offset_enable) {
 413         rs->depth_offset_front = rs->depth_offset_back =
 414             fui(state->offset_units);
 415         rs->depth_scale_front = rs->depth_scale_back =
 416             fui(state->offset_scale);
 417     }
 418
 419     if (state->line_stipple_enable) {
 420         rs->line_stipple_config =
 421             R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
 422             (fui((float)state->line_stipple_factor) &
 423                 R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
 424         /* XXX this might need to be scaled up */
 425         rs->line_stipple_value = state->line_stipple_pattern;
 426     }
 427
 428     if (state->flatshade) {
 429         rs->color_control = R300_SHADE_MODEL_FLAT;
 430     } else {
 431         rs->color_control = R300_SHADE_MODEL_SMOOTH;
 432     }
 433
 434     if (!state->flatshade_first) {
 435         rs->color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 436     }
 437
 438     return (void*)rs;
 439 }
 440
 441 /* Bind rasterizer state. */
 442 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 443 {
 444     struct r300_context* r300 = r300_context(pipe);
 445     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 446
 447     draw_flush(r300->draw);
 448     draw_set_rasterizer_state(r300->draw, &rs->rs);
 449
 450     r300->rs_state = rs;
 451     r300->dirty_state |= R300_NEW_RASTERIZER;
 452     r300->dirty_state |= R300_NEW_RS_BLOCK;
 453     r300->dirty_state |= R300_NEW_SCISSOR;
 454     r300->dirty_state |= R300_NEW_VIEWPORT;
 455 }
 456
 457 /* Free rasterizer state. */
 458 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 459 {
 460     FREE(state);
 461 }
 462
 463 static void*
 464         r300_create_sampler_state(struct pipe_context* pipe,
 465                                   const struct pipe_sampler_state* state)
 466 {
 467     struct r300_context* r300 = r300_context(pipe);
 468     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 469     int lod_bias;
 470
 471     sampler->filter0 |=
 472         (r300_translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 473         (r300_translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 474         (r300_translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 475
 476     sampler->filter0 |= r300_translate_tex_filters(state->min_img_filter,
 477                                                    state->mag_img_filter,
 478                                                    state->min_mip_filter);
 479
 480     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 481
 482     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 483
 484     sampler->filter1 |= r300_anisotropy(state->max_anisotropy);
 485
 486     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM,
 487                     &sampler->border_color);
 488
 489     /* R500-specific fixups and optimizations */
 490     if (r300_screen(r300->context.screen)->caps->is_r500) {
 491         sampler->filter1 |= R500_BORDER_FIX;
 492     }
 493
 494     return (void*)sampler;
 495 }
 496
 497 static void r300_bind_sampler_states(struct pipe_context* pipe,
 498                                      unsigned count,
 499                                      void** states)
 500 {
 501     struct r300_context* r300 = r300_context(pipe);
 502     int i;
 503
 504     if (count > 8) {
 505         return;
 506     }
 507
 508     for (i = 0; i < count; i++) {
 509         if (r300->sampler_states[i] != states[i]) {
 510             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 511             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 512         }
 513     }
 514
 515     r300->sampler_count = count;
 516 }
 517
 518 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 519 {
 520     FREE(state);
 521 }
 522
 523 static void r300_set_sampler_textures(struct pipe_context* pipe,
 524                                       unsigned count,
 525                                       struct pipe_texture** texture)
 526 {
 527     struct r300_context* r300 = r300_context(pipe);
 528     int i;
 529
 530     /* XXX magic num */
 531     if (count > 8) {
 532         return;
 533     }
 534
 535     for (i = 0; i < count; i++) {
 536         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 537             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 538                 texture[i]);
 539             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 540         }
 541     }
 542
 543     for (i = count; i < 8; i++) {
 544         if (r300->textures[i]) {
 545             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 546                 NULL);
 547             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 548         }
 549     }
 550
 551     r300->texture_count = count;
 552 }
 553
 554 static void r300_set_scissor_state(struct pipe_context* pipe,
 555                                    const struct pipe_scissor_state* state)
 556 {
 557     struct r300_context* r300 = r300_context(pipe);
 558
 559     if (r300_screen(r300->context.screen)->caps->is_r500) {
 560         r300->scissor_state->scissor_top_left =
 561             (state->minx << R300_SCISSORS_X_SHIFT) |
 562             (state->miny << R300_SCISSORS_Y_SHIFT);
 563         r300->scissor_state->scissor_bottom_right =
 564             ((state->maxx - 1) << R300_SCISSORS_X_SHIFT) |
 565             ((state->maxy - 1) << R300_SCISSORS_Y_SHIFT);
 566     } else {
 567         /* Offset of 1440 in non-R500 chipsets. */
 568         r300->scissor_state->scissor_top_left =
 569             ((state->minx + 1440) << R300_SCISSORS_X_SHIFT) |
 570             ((state->miny + 1440) << R300_SCISSORS_Y_SHIFT);
 571         r300->scissor_state->scissor_bottom_right =
 572             (((state->maxx - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 573             (((state->maxy - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 574     }
 575
 576     r300->dirty_state |= R300_NEW_SCISSOR;
 577 }
 578
 579 static void r300_set_viewport_state(struct pipe_context* pipe,
 580                                     const struct pipe_viewport_state* state)
 581 {
 582     struct r300_context* r300 = r300_context(pipe);
 583
 584     /* Do the transform in HW. */
 585     r300->viewport_state->vte_control = R300_VTX_W0_FMT;
 586
 587     if (state->scale[0] != 1.0f) {
 588         r300->viewport_state->xscale = state->scale[0];
 589         r300->viewport_state->vte_control |= R300_VPORT_X_SCALE_ENA;
 590     }
 591     if (state->scale[1] != 1.0f) {
 592         r300->viewport_state->yscale = state->scale[1];
 593         r300->viewport_state->vte_control |= R300_VPORT_Y_SCALE_ENA;
 594     }
 595     if (state->scale[2] != 1.0f) {
 596         r300->viewport_state->zscale = state->scale[2];
 597         r300->viewport_state->vte_control |= R300_VPORT_Z_SCALE_ENA;
 598     }
 599     if (state->translate[0] != 0.0f) {
 600         r300->viewport_state->xoffset = state->translate[0];
 601         r300->viewport_state->vte_control |= R300_VPORT_X_OFFSET_ENA;
 602     }
 603     if (state->translate[1] != 0.0f) {
 604         r300->viewport_state->yoffset = state->translate[1];
 605         r300->viewport_state->vte_control |= R300_VPORT_Y_OFFSET_ENA;
 606     }
 607     if (state->translate[2] != 0.0f) {
 608         r300->viewport_state->zoffset = state->translate[2];
 609         r300->viewport_state->vte_control |= R300_VPORT_Z_OFFSET_ENA;
 610     }
 611
 612     r300->dirty_state |= R300_NEW_VIEWPORT;
 613 }
 614
 615 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 616                                     unsigned count,
 617                                     const struct pipe_vertex_buffer* buffers)
 618 {
 619     struct r300_context* r300 = r300_context(pipe);
 620
 621     memcpy(r300->vertex_buffers, buffers,
 622         sizeof(struct pipe_vertex_buffer) * count);
 623
 624     r300->vertex_buffer_count = count;
 625
 626     draw_flush(r300->draw);
 627     draw_set_vertex_buffers(r300->draw, count, buffers);
 628 }
 629
 630 static void r300_set_vertex_elements(struct pipe_context* pipe,
 631                                     unsigned count,
 632                                     const struct pipe_vertex_element* elements)
 633 {
 634     struct r300_context* r300 = r300_context(pipe);
 635
 636     draw_flush(r300->draw);
 637     draw_set_vertex_elements(r300->draw, count, elements);
 638 }
 639
 640 static void* r300_create_vs_state(struct pipe_context* pipe,
 641                                   const struct pipe_shader_state* shader)
 642 {
 643     struct r300_context* r300 = r300_context(pipe);
 644
 645     if (r300_screen(pipe->screen)->caps->has_tcl) {
 646         struct r300_vertex_shader* vs = CALLOC_STRUCT(r300_vertex_shader);
 647         /* Copy state directly into shader. */
 648         vs->state = *shader;
 649         vs->state.tokens = tgsi_dup_tokens(shader->tokens);
 650
 651         tgsi_scan_shader(shader->tokens, &vs->info);
 652
 653         /* Appease Draw. */
 654         vs->draw = draw_create_vertex_shader(r300->draw, shader);
 655
 656         return (void*)vs;
 657     } else {
 658         return draw_create_vertex_shader(r300->draw, shader);
 659     }
 660 }
 661
 662 static void r300_bind_vs_state(struct pipe_context* pipe, void* shader)
 663 {
 664     struct r300_context* r300 = r300_context(pipe);
 665
 666     draw_flush(r300->draw);
 667
 668     if (r300_screen(pipe->screen)->caps->has_tcl) {
 669         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 670
 671         if (vs == NULL) {
 672             r300->vs = NULL;
 673             return;
 674         } else if (!vs->translated) {
 675             r300_translate_vertex_shader(r300, vs);
 676         }
 677
 678         draw_bind_vertex_shader(r300->draw, vs->draw);
 679         r300->vs = vs;
 680         r300->dirty_state |= R300_NEW_VERTEX_SHADER | R300_NEW_VERTEX_SHADER_CONSTANTS;
 681     } else {
 682         draw_bind_vertex_shader(r300->draw,
 683                 (struct draw_vertex_shader*)shader);
 684     }
 685 }
 686
 687 static void r300_delete_vs_state(struct pipe_context* pipe, void* shader)
 688 {
 689     struct r300_context* r300 = r300_context(pipe);
 690
 691     if (r300_screen(pipe->screen)->caps->has_tcl) {
 692         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 693
 694         rc_constants_destroy(&vs->code.constants);
 695         draw_delete_vertex_shader(r300->draw, vs->draw);
 696         FREE((void*)vs->state.tokens);
 697         FREE(shader);
 698     } else {
 699         draw_delete_vertex_shader(r300->draw,
 700                 (struct draw_vertex_shader*)shader);
 701     }
 702 }
 703
 704 static void r300_set_constant_buffer(struct pipe_context *pipe,
 705                                      uint shader, uint index,
 706                                      const struct pipe_constant_buffer *buf)
 707 {
 708     struct r300_context* r300 = r300_context(pipe);
 709     void *mapped;
 710
 711     if (buf == NULL || buf->buffer->size == 0 ||
 712         (mapped = pipe_buffer_map(pipe->screen, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)) == NULL)
 713     {
 714         r300->shader_constants[shader].count = 0;
 715         return;
 716     }
 717
 718     assert((buf->buffer->size % 4 * sizeof(float)) == 0);
 719     memcpy(r300->shader_constants[shader].constants, mapped, buf->buffer->size);
 720     r300->shader_constants[shader].count = buf->buffer->size / (4 * sizeof(float));
 721     pipe_buffer_unmap(pipe->screen, buf->buffer);
 722
 723     if (shader == PIPE_SHADER_VERTEX)
 724         r300->dirty_state |= R300_NEW_VERTEX_SHADER_CONSTANTS;
 725     else if (shader == PIPE_SHADER_FRAGMENT)
 726         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 727 }
 728
 729 void r300_init_state_functions(struct r300_context* r300)
 730 {
 731     r300->context.create_blend_state = r300_create_blend_state;
 732     r300->context.bind_blend_state = r300_bind_blend_state;
 733     r300->context.delete_blend_state = r300_delete_blend_state;
 734
 735     r300->context.set_blend_color = r300_set_blend_color;
 736
 737     r300->context.set_clip_state = r300_set_clip_state;
 738
 739     r300->context.set_constant_buffer = r300_set_constant_buffer;
 740
 741     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 742     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 743     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 744
 745     r300->context.set_edgeflags = r300_set_edgeflags;
 746
 747     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 748
 749     r300->context.create_fs_state = r300_create_fs_state;
 750     r300->context.bind_fs_state = r300_bind_fs_state;
 751     r300->context.delete_fs_state = r300_delete_fs_state;
 752
 753     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 754
 755     r300->context.create_rasterizer_state = r300_create_rs_state;
 756     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 757     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 758
 759     r300->context.create_sampler_state = r300_create_sampler_state;
 760     r300->context.bind_sampler_states = r300_bind_sampler_states;
 761     r300->context.delete_sampler_state = r300_delete_sampler_state;
 762
 763     r300->context.set_sampler_textures = r300_set_sampler_textures;
 764
 765     r300->context.set_scissor_state = r300_set_scissor_state;
 766
 767     r300->context.set_viewport_state = r300_set_viewport_state;
 768
 769     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 770     r300->context.set_vertex_elements = r300_set_vertex_elements;
 771
 772     r300->context.create_vs_state = r300_create_vs_state;
 773     r300->context.bind_vs_state = r300_bind_vs_state;
 774     r300->context.delete_vs_state = r300_delete_vs_state;
 775 }