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_edgeflags(struct pipe_context* pipe,
 287                                const unsigned* bitfield)
 288 {
 289     /* XXX you know it's bad when i915 has this blank too */
 290     /* XXX and even worse, I have no idea WTF the bitfield is */
 291 }
 292
 293 static void r300_set_scissor_regs(const struct pipe_scissor_state* state,
 294                                   struct r300_scissor_regs *scissor,
 295                                   boolean is_r500)
 296 {
 297     if (is_r500) {
 298         scissor->top_left =
 299             (state->minx << R300_SCISSORS_X_SHIFT) |
 300             (state->miny << R300_SCISSORS_Y_SHIFT);
 301         scissor->bottom_right =
 302             ((state->maxx - 1) << R300_SCISSORS_X_SHIFT) |
 303             ((state->maxy - 1) << R300_SCISSORS_Y_SHIFT);
 304     } else {
 305         /* Offset of 1440 in non-R500 chipsets. */
 306         scissor->top_left =
 307             ((state->minx + 1440) << R300_SCISSORS_X_SHIFT) |
 308             ((state->miny + 1440) << R300_SCISSORS_Y_SHIFT);
 309         scissor->bottom_right =
 310             (((state->maxx - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 311             (((state->maxy - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 312     }
 313
 314     scissor->empty_area = state->minx >= state->maxx ||
 315                           state->miny >= state->maxy;
 316 }
 317
 318 static void
 319     r300_set_framebuffer_state(struct pipe_context* pipe,
 320                                const struct pipe_framebuffer_state* state)
 321 {
 322     struct r300_context* r300 = r300_context(pipe);
 323     struct pipe_scissor_state scissor;
 324
 325     if (r300->draw) {
 326         draw_flush(r300->draw);
 327     }
 328
 329     r300->framebuffer_state = *state;
 330
 331     scissor.minx = scissor.miny = 0;
 332     scissor.maxx = state->width;
 333     scissor.maxy = state->height;
 334     r300_set_scissor_regs(&scissor, &r300->scissor_state->framebuffer,
 335                           r300_screen(r300->context.screen)->caps->is_r500);
 336
 337     /* Don't rely on the order of states being set for the first time. */
 338     if (!r300->rs_state || !r300->rs_state->rs.scissor) {
 339         r300->dirty_state |= R300_NEW_SCISSOR;
 340     }
 341     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 342     r300->dirty_state |= R300_NEW_BLEND;
 343 }
 344
 345 /* Create fragment shader state. */
 346 static void* r300_create_fs_state(struct pipe_context* pipe,
 347                                   const struct pipe_shader_state* shader)
 348 {
 349     struct r300_fragment_shader* fs = NULL;
 350
 351     fs = (struct r300_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 352
 353     /* Copy state directly into shader. */
 354     fs->state = *shader;
 355     fs->state.tokens = tgsi_dup_tokens(shader->tokens);
 356
 357     tgsi_scan_shader(shader->tokens, &fs->info);
 358
 359     return (void*)fs;
 360 }
 361
 362 /* Bind fragment shader state. */
 363 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 364 {
 365     struct r300_context* r300 = r300_context(pipe);
 366     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 367
 368     if (fs == NULL) {
 369         r300->fs = NULL;
 370         return;
 371     } else if (!fs->translated) {
 372         r300_translate_fragment_shader(r300, fs);
 373     }
 374
 375     r300->fs = fs;
 376
 377     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER | R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 378 }
 379
 380 /* Delete fragment shader state. */
 381 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 382 {
 383     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 384     rc_constants_destroy(&fs->code.constants);
 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     if (!state->flatshade_first) {
 514         rs->color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 515     }
 516
 517     return (void*)rs;
 518 }
 519
 520 /* Bind rasterizer state. */
 521 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 522 {
 523     struct r300_context* r300 = r300_context(pipe);
 524     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 525
 526     if (r300->draw) {
 527         draw_flush(r300->draw);
 528         draw_set_rasterizer_state(r300->draw, &rs->rs);
 529     }
 530
 531     r300->rs_state = rs;
 532     /* XXX Clean these up when we move to atom emits */
 533     r300->dirty_state |= R300_NEW_RASTERIZER;
 534     r300->dirty_state |= R300_NEW_RS_BLOCK;
 535     r300->dirty_state |= R300_NEW_SCISSOR;
 536     r300->dirty_state |= R300_NEW_VIEWPORT;
 537 }
 538
 539 /* Free rasterizer state. */
 540 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 541 {
 542     FREE(state);
 543 }
 544
 545 static void*
 546         r300_create_sampler_state(struct pipe_context* pipe,
 547                                   const struct pipe_sampler_state* state)
 548 {
 549     struct r300_context* r300 = r300_context(pipe);
 550     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 551     int lod_bias;
 552     union util_color uc;
 553
 554     sampler->filter0 |=
 555         (r300_translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 556         (r300_translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 557         (r300_translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 558
 559     sampler->filter0 |= r300_translate_tex_filters(state->min_img_filter,
 560                                                    state->mag_img_filter,
 561                                                    state->min_mip_filter);
 562
 563     /* Unfortunately, r300-r500 don't support floating-point mipmap lods. */
 564     /* We must pass these to the emit function to clamp them properly. */
 565     sampler->min_lod = MAX2((unsigned)state->min_lod, 0);
 566     sampler->max_lod = MAX2((unsigned)ceilf(state->max_lod), 0);
 567
 568     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 569
 570     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 571
 572     sampler->filter1 |= r300_anisotropy(state->max_anisotropy);
 573
 574     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM, &uc);
 575     sampler->border_color = uc.ui;
 576
 577     /* R500-specific fixups and optimizations */
 578     if (r300_screen(r300->context.screen)->caps->is_r500) {
 579         sampler->filter1 |= R500_BORDER_FIX;
 580     }
 581
 582     return (void*)sampler;
 583 }
 584
 585 static void r300_bind_sampler_states(struct pipe_context* pipe,
 586                                      unsigned count,
 587                                      void** states)
 588 {
 589     struct r300_context* r300 = r300_context(pipe);
 590     int i;
 591
 592     if (count > 8) {
 593         return;
 594     }
 595
 596     for (i = 0; i < count; i++) {
 597         if (r300->sampler_states[i] != states[i]) {
 598             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 599             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 600         }
 601     }
 602
 603     r300->sampler_count = count;
 604 }
 605
 606 static void r300_lacks_vertex_textures(struct pipe_context* pipe,
 607                                        unsigned count,
 608                                        void** states)
 609 {
 610 }
 611
 612 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 613 {
 614     FREE(state);
 615 }
 616
 617 static void r300_set_sampler_textures(struct pipe_context* pipe,
 618                                       unsigned count,
 619                                       struct pipe_texture** texture)
 620 {
 621     struct r300_context* r300 = r300_context(pipe);
 622     boolean is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
 623     int i;
 624
 625     /* XXX magic num */
 626     if (count > 8) {
 627         return;
 628     }
 629
 630     for (i = 0; i < count; i++) {
 631         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 632             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 633                 texture[i]);
 634             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 635
 636             /* R300-specific - set the texrect factor in a fragment shader */
 637             if (!is_r500 && r300->textures[i]->is_npot) {
 638                 /* XXX It would be nice to re-emit just 1 constant,
 639                  * XXX not all of them */
 640                 r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 641             }
 642         }
 643     }
 644
 645     for (i = count; i < 8; i++) {
 646         if (r300->textures[i]) {
 647             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 648                 NULL);
 649             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 650         }
 651     }
 652
 653     r300->texture_count = count;
 654 }
 655
 656 static void r300_set_scissor_state(struct pipe_context* pipe,
 657                                    const struct pipe_scissor_state* state)
 658 {
 659     struct r300_context* r300 = r300_context(pipe);
 660
 661     r300_set_scissor_regs(state, &r300->scissor_state->scissor,
 662                           r300_screen(r300->context.screen)->caps->is_r500);
 663
 664     /* Don't rely on the order of states being set for the first time. */
 665     if (!r300->rs_state || r300->rs_state->rs.scissor) {
 666         r300->dirty_state |= R300_NEW_SCISSOR;
 667     }
 668 }
 669
 670 static void r300_set_viewport_state(struct pipe_context* pipe,
 671                                     const struct pipe_viewport_state* state)
 672 {
 673     struct r300_context* r300 = r300_context(pipe);
 674
 675     /* Do the transform in HW. */
 676     r300->viewport_state->vte_control = R300_VTX_W0_FMT;
 677
 678     if (state->scale[0] != 1.0f) {
 679         r300->viewport_state->xscale = state->scale[0];
 680         r300->viewport_state->vte_control |= R300_VPORT_X_SCALE_ENA;
 681     }
 682     if (state->scale[1] != 1.0f) {
 683         r300->viewport_state->yscale = state->scale[1];
 684         r300->viewport_state->vte_control |= R300_VPORT_Y_SCALE_ENA;
 685     }
 686     if (state->scale[2] != 1.0f) {
 687         r300->viewport_state->zscale = state->scale[2];
 688         r300->viewport_state->vte_control |= R300_VPORT_Z_SCALE_ENA;
 689     }
 690     if (state->translate[0] != 0.0f) {
 691         r300->viewport_state->xoffset = state->translate[0];
 692         r300->viewport_state->vte_control |= R300_VPORT_X_OFFSET_ENA;
 693     }
 694     if (state->translate[1] != 0.0f) {
 695         r300->viewport_state->yoffset = state->translate[1];
 696         r300->viewport_state->vte_control |= R300_VPORT_Y_OFFSET_ENA;
 697     }
 698     if (state->translate[2] != 0.0f) {
 699         r300->viewport_state->zoffset = state->translate[2];
 700         r300->viewport_state->vte_control |= R300_VPORT_Z_OFFSET_ENA;
 701     }
 702
 703     r300->dirty_state |= R300_NEW_VIEWPORT;
 704 }
 705
 706 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 707                                     unsigned count,
 708                                     const struct pipe_vertex_buffer* buffers)
 709 {
 710     struct r300_context* r300 = r300_context(pipe);
 711
 712     memcpy(r300->vertex_buffer, buffers,
 713         sizeof(struct pipe_vertex_buffer) * count);
 714     r300->vertex_buffer_count = count;
 715
 716     if (r300->draw) {
 717         draw_flush(r300->draw);
 718         draw_set_vertex_buffers(r300->draw, count, buffers);
 719     }
 720
 721     r300->dirty_state |= R300_NEW_VERTEX_FORMAT;
 722 }
 723
 724 static void r300_set_vertex_elements(struct pipe_context* pipe,
 725                                     unsigned count,
 726                                     const struct pipe_vertex_element* elements)
 727 {
 728     struct r300_context* r300 = r300_context(pipe);
 729
 730     memcpy(r300->vertex_element,
 731            elements,
 732            sizeof(struct pipe_vertex_element) * count);
 733     r300->vertex_element_count = count;
 734
 735     if (r300->draw) {
 736         draw_flush(r300->draw);
 737         draw_set_vertex_elements(r300->draw, count, elements);
 738     }
 739 }
 740
 741 static void* r300_create_vs_state(struct pipe_context* pipe,
 742                                   const struct pipe_shader_state* shader)
 743 {
 744     struct r300_context* r300 = r300_context(pipe);
 745
 746     if (r300_screen(pipe->screen)->caps->has_tcl) {
 747         struct r300_vertex_shader* vs = CALLOC_STRUCT(r300_vertex_shader);
 748         /* Copy state directly into shader. */
 749         vs->state = *shader;
 750         vs->state.tokens = tgsi_dup_tokens(shader->tokens);
 751
 752         tgsi_scan_shader(shader->tokens, &vs->info);
 753
 754         return (void*)vs;
 755     } else {
 756         return draw_create_vertex_shader(r300->draw, shader);
 757     }
 758 }
 759
 760 static void r300_bind_vs_state(struct pipe_context* pipe, void* shader)
 761 {
 762     struct r300_context* r300 = r300_context(pipe);
 763
 764     if (r300_screen(pipe->screen)->caps->has_tcl) {
 765         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 766
 767         if (vs == NULL) {
 768             r300->vs = NULL;
 769             return;
 770         } else if (!vs->translated) {
 771             r300_translate_vertex_shader(r300, vs);
 772         }
 773
 774         r300->vs = vs;
 775         r300->dirty_state |= R300_NEW_VERTEX_SHADER | R300_NEW_VERTEX_SHADER_CONSTANTS;
 776     } else {
 777         draw_flush(r300->draw);
 778         draw_bind_vertex_shader(r300->draw,
 779                 (struct draw_vertex_shader*)shader);
 780     }
 781 }
 782
 783 static void r300_delete_vs_state(struct pipe_context* pipe, void* shader)
 784 {
 785     struct r300_context* r300 = r300_context(pipe);
 786
 787     if (r300_screen(pipe->screen)->caps->has_tcl) {
 788         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 789
 790         rc_constants_destroy(&vs->code.constants);
 791         FREE((void*)vs->state.tokens);
 792         FREE(shader);
 793     } else {
 794         draw_delete_vertex_shader(r300->draw,
 795                 (struct draw_vertex_shader*)shader);
 796     }
 797 }
 798
 799 static void r300_set_constant_buffer(struct pipe_context *pipe,
 800                                      uint shader, uint index,
 801                                      const struct pipe_constant_buffer *buf)
 802 {
 803     struct r300_context* r300 = r300_context(pipe);
 804     void *mapped;
 805
 806     if (buf == NULL || buf->buffer->size == 0 ||
 807         (mapped = pipe_buffer_map(pipe->screen, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)) == NULL)
 808     {
 809         r300->shader_constants[shader].count = 0;
 810         return;
 811     }
 812
 813     assert((buf->buffer->size % 4 * sizeof(float)) == 0);
 814     memcpy(r300->shader_constants[shader].constants, mapped, buf->buffer->size);
 815     r300->shader_constants[shader].count = buf->buffer->size / (4 * sizeof(float));
 816     pipe_buffer_unmap(pipe->screen, buf->buffer);
 817
 818     if (shader == PIPE_SHADER_VERTEX)
 819         r300->dirty_state |= R300_NEW_VERTEX_SHADER_CONSTANTS;
 820     else if (shader == PIPE_SHADER_FRAGMENT)
 821         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 822 }
 823
 824 void r300_init_state_functions(struct r300_context* r300)
 825 {
 826     r300->context.create_blend_state = r300_create_blend_state;
 827     r300->context.bind_blend_state = r300_bind_blend_state;
 828     r300->context.delete_blend_state = r300_delete_blend_state;
 829
 830     r300->context.set_blend_color = r300_set_blend_color;
 831
 832     r300->context.set_clip_state = r300_set_clip_state;
 833
 834     r300->context.set_constant_buffer = r300_set_constant_buffer;
 835
 836     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 837     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 838     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 839
 840     r300->context.set_edgeflags = r300_set_edgeflags;
 841
 842     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 843
 844     r300->context.create_fs_state = r300_create_fs_state;
 845     r300->context.bind_fs_state = r300_bind_fs_state;
 846     r300->context.delete_fs_state = r300_delete_fs_state;
 847
 848     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 849
 850     r300->context.create_rasterizer_state = r300_create_rs_state;
 851     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 852     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 853
 854     r300->context.create_sampler_state = r300_create_sampler_state;
 855     r300->context.bind_fragment_sampler_states = r300_bind_sampler_states;
 856     r300->context.bind_vertex_sampler_states = r300_lacks_vertex_textures;
 857     r300->context.delete_sampler_state = r300_delete_sampler_state;
 858
 859     r300->context.set_fragment_sampler_textures = r300_set_sampler_textures;
 860
 861     r300->context.set_scissor_state = r300_set_scissor_state;
 862
 863     r300->context.set_viewport_state = r300_set_viewport_state;
 864
 865     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 866     r300->context.set_vertex_elements = r300_set_vertex_elements;
 867
 868     r300->context.create_vs_state = r300_create_vs_state;
 869     r300->context.bind_vs_state = r300_bind_vs_state;
 870     r300->context.delete_vs_state = r300_delete_vs_state;
 871 }