src/gallium/drivers/r300/r300_state.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #include "draw/draw_context.h"
  25
  26 #include "util/u_math.h"
  27 #include "util/u_memory.h"
  28 #include "util/u_pack_color.h"
  29
  30 #include "tgsi/tgsi_parse.h"
  31
  32 #include "pipe/p_config.h"
  33 #include "pipe/internal/p_winsys_screen.h"
  34
  35 #include "r300_context.h"
  36 #include "r300_reg.h"
  37 #include "r300_screen.h"
  38 #include "r300_state_inlines.h"
  39 #include "r300_fs.h"
  40 #include "r300_vs.h"
  41
  42 /* r300_state: Functions used to intialize state context by translating
  43  * Gallium state objects into semi-native r300 state objects. */
  44
  45 static boolean blend_discard_if_src_alpha_0(unsigned srcRGB, unsigned srcA,
  46                                             unsigned dstRGB, unsigned dstA)
  47 {
  48     /* If the blend equation is ADD or REVERSE_SUBTRACT,
  49      * SRC_ALPHA == 0, and the following state is set, the colorbuffer
  50      * will not be changed.
  51      * Notice that the dst factors are the src factors inverted. */
  52     return (srcRGB == PIPE_BLENDFACTOR_SRC_ALPHA ||
  53             srcRGB == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE ||
  54             srcRGB == PIPE_BLENDFACTOR_ZERO) &&
  55            (srcA == PIPE_BLENDFACTOR_SRC_COLOR ||
  56             srcA == PIPE_BLENDFACTOR_SRC_ALPHA ||
  57             srcA == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE ||
  58             srcA == PIPE_BLENDFACTOR_ZERO) &&
  59            (dstRGB == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
  60             dstRGB == PIPE_BLENDFACTOR_ONE) &&
  61            (dstA == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
  62             dstA == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
  63             dstA == PIPE_BLENDFACTOR_ONE);
  64 }
  65
  66 static boolean blend_discard_if_src_alpha_1(unsigned srcRGB, unsigned srcA,
  67                                             unsigned dstRGB, unsigned dstA)
  68 {
  69     /* If the blend equation is ADD or REVERSE_SUBTRACT,
  70      * SRC_ALPHA == 1, and the following state is set, the colorbuffer
  71      * will not be changed.
  72      * Notice that the dst factors are the src factors inverted. */
  73     return (srcRGB == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
  74             srcRGB == PIPE_BLENDFACTOR_ZERO) &&
  75            (srcA == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
  76             srcA == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
  77             srcA == PIPE_BLENDFACTOR_ZERO) &&
  78            (dstRGB == PIPE_BLENDFACTOR_SRC_ALPHA ||
  79             dstRGB == PIPE_BLENDFACTOR_ONE) &&
  80            (dstA == PIPE_BLENDFACTOR_SRC_COLOR ||
  81             dstA == PIPE_BLENDFACTOR_SRC_ALPHA ||
  82             dstA == PIPE_BLENDFACTOR_ONE);
  83 }
  84
  85 static boolean blend_discard_if_src_color_0(unsigned srcRGB, unsigned srcA,
  86                                             unsigned dstRGB, unsigned dstA)
  87 {
  88     /* If the blend equation is ADD or REVERSE_SUBTRACT,
  89      * SRC_COLOR == (0,0,0), and the following state is set, the colorbuffer
  90      * will not be changed.
  91      * Notice that the dst factors are the src factors inverted. */
  92     return (srcRGB == PIPE_BLENDFACTOR_SRC_COLOR ||
  93             srcRGB == PIPE_BLENDFACTOR_ZERO) &&
  94            (srcA == PIPE_BLENDFACTOR_ZERO) &&
  95            (dstRGB == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
  96             dstRGB == PIPE_BLENDFACTOR_ONE) &&
  97            (dstA == PIPE_BLENDFACTOR_ONE);
  98 }
  99
 100 static boolean blend_discard_if_src_color_1(unsigned srcRGB, unsigned srcA,
 101                                             unsigned dstRGB, unsigned dstA)
 102 {
 103     /* If the blend equation is ADD or REVERSE_SUBTRACT,
 104      * SRC_COLOR == (1,1,1), and the following state is set, the colorbuffer
 105      * will not be changed.
 106      * Notice that the dst factors are the src factors inverted. */
 107     return (srcRGB == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
 108             srcRGB == PIPE_BLENDFACTOR_ZERO) &&
 109            (srcA == PIPE_BLENDFACTOR_ZERO) &&
 110            (dstRGB == PIPE_BLENDFACTOR_SRC_COLOR ||
 111             dstRGB == PIPE_BLENDFACTOR_ONE) &&
 112            (dstA == PIPE_BLENDFACTOR_ONE);
 113 }
 114
 115 static boolean blend_discard_if_src_alpha_color_0(unsigned srcRGB, unsigned srcA,
 116                                                   unsigned dstRGB, unsigned dstA)
 117 {
 118     /* If the blend equation is ADD or REVERSE_SUBTRACT,
 119      * SRC_ALPHA_COLOR == (0,0,0,0), and the following state is set,
 120      * the colorbuffer will not be changed.
 121      * Notice that the dst factors are the src factors inverted. */
 122     return (srcRGB == PIPE_BLENDFACTOR_SRC_COLOR ||
 123             srcRGB == PIPE_BLENDFACTOR_SRC_ALPHA ||
 124             srcRGB == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE ||
 125             srcRGB == PIPE_BLENDFACTOR_ZERO) &&
 126            (srcA == PIPE_BLENDFACTOR_SRC_COLOR ||
 127             srcA == PIPE_BLENDFACTOR_SRC_ALPHA ||
 128             srcA == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE ||
 129             srcA == PIPE_BLENDFACTOR_ZERO) &&
 130            (dstRGB == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
 131             dstRGB == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
 132             dstRGB == PIPE_BLENDFACTOR_ONE) &&
 133            (dstA == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
 134             dstA == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
 135             dstA == PIPE_BLENDFACTOR_ONE);
 136 }
 137
 138 static boolean blend_discard_if_src_alpha_color_1(unsigned srcRGB, unsigned srcA,
 139                                                   unsigned dstRGB, unsigned dstA)
 140 {
 141     /* If the blend equation is ADD or REVERSE_SUBTRACT,
 142      * SRC_ALPHA_COLOR == (1,1,1,1), and the following state is set,
 143      * the colorbuffer will not be changed.
 144      * Notice that the dst factors are the src factors inverted. */
 145     return (srcRGB == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
 146             srcRGB == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
 147             srcRGB == PIPE_BLENDFACTOR_ZERO) &&
 148            (srcA == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
 149             srcA == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
 150             srcA == PIPE_BLENDFACTOR_ZERO) &&
 151            (dstRGB == PIPE_BLENDFACTOR_SRC_COLOR ||
 152             dstRGB == PIPE_BLENDFACTOR_SRC_ALPHA ||
 153             dstRGB == PIPE_BLENDFACTOR_ONE) &&
 154            (dstA == PIPE_BLENDFACTOR_SRC_COLOR ||
 155             dstA == PIPE_BLENDFACTOR_SRC_ALPHA ||
 156             dstA == PIPE_BLENDFACTOR_ONE);
 157 }
 158
 159 /* Create a new blend state based on the CSO blend state.
 160  *
 161  * This encompasses alpha blending, logic/raster ops, and blend dithering. */
 162 static void* r300_create_blend_state(struct pipe_context* pipe,
 163                                      const struct pipe_blend_state* state)
 164 {
 165     struct r300_blend_state* blend = CALLOC_STRUCT(r300_blend_state);
 166
 167     if (state->blend_enable)
 168     {
 169         unsigned eqRGB = state->rgb_func;
 170         unsigned srcRGB = state->rgb_src_factor;
 171         unsigned dstRGB = state->rgb_dst_factor;
 172
 173         unsigned eqA = state->alpha_func;
 174         unsigned srcA = state->alpha_src_factor;
 175         unsigned dstA = state->alpha_dst_factor;
 176
 177         /* despite the name, ALPHA_BLEND_ENABLE has nothing to do with alpha,
 178          * this is just the crappy D3D naming */
 179         blend->blend_control = R300_ALPHA_BLEND_ENABLE |
 180             r300_translate_blend_function(eqRGB) |
 181             ( r300_translate_blend_factor(srcRGB) << R300_SRC_BLEND_SHIFT) |
 182             ( r300_translate_blend_factor(dstRGB) << R300_DST_BLEND_SHIFT);
 183
 184         /* Optimization: some operations do not require the destination color.
 185          *
 186          * When SRC_ALPHA_SATURATE is used, colorbuffer reads must be enabled,
 187          * otherwise blending gives incorrect results. It seems to be
 188          * a hardware bug. */
 189         if (eqRGB == PIPE_BLEND_MIN || eqA == PIPE_BLEND_MIN ||
 190             eqRGB == PIPE_BLEND_MAX || eqA == PIPE_BLEND_MAX ||
 191             dstRGB != PIPE_BLENDFACTOR_ZERO ||
 192             dstA != PIPE_BLENDFACTOR_ZERO ||
 193             srcRGB == PIPE_BLENDFACTOR_DST_COLOR ||
 194             srcRGB == PIPE_BLENDFACTOR_DST_ALPHA ||
 195             srcRGB == PIPE_BLENDFACTOR_INV_DST_COLOR ||
 196             srcRGB == PIPE_BLENDFACTOR_INV_DST_ALPHA ||
 197             srcA == PIPE_BLENDFACTOR_DST_COLOR ||
 198             srcA == PIPE_BLENDFACTOR_DST_ALPHA ||
 199             srcA == PIPE_BLENDFACTOR_INV_DST_COLOR ||
 200             srcA == PIPE_BLENDFACTOR_INV_DST_ALPHA ||
 201             srcRGB == PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE) {
 202             /* Enable reading from the colorbuffer. */
 203             blend->blend_control |= R300_READ_ENABLE;
 204
 205             if (r300_screen(r300_context(pipe)->context.screen)->caps->is_r500) {
 206                 /* Optimization: Depending on incoming pixels, we can
 207                  * conditionally disable the reading in hardware... */
 208                 if (eqRGB != PIPE_BLEND_MIN && eqA != PIPE_BLEND_MIN &&
 209                     eqRGB != PIPE_BLEND_MAX && eqA != PIPE_BLEND_MAX) {
 210                     /* Disable reading if SRC_ALPHA == 0. */
 211                     if ((dstRGB == PIPE_BLENDFACTOR_SRC_ALPHA ||
 212                          dstRGB == PIPE_BLENDFACTOR_ZERO) &&
 213                         (dstA == PIPE_BLENDFACTOR_SRC_COLOR ||
 214                          dstA == PIPE_BLENDFACTOR_SRC_ALPHA ||
 215                          dstA == PIPE_BLENDFACTOR_ZERO)) {
 216                          blend->blend_control |= R500_SRC_ALPHA_0_NO_READ;
 217                     }
 218
 219                     /* Disable reading if SRC_ALPHA == 1. */
 220                     if ((dstRGB == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
 221                          dstRGB == PIPE_BLENDFACTOR_ZERO) &&
 222                         (dstA == PIPE_BLENDFACTOR_INV_SRC_COLOR ||
 223                          dstA == PIPE_BLENDFACTOR_INV_SRC_ALPHA ||
 224                          dstA == PIPE_BLENDFACTOR_ZERO)) {
 225                          blend->blend_control |= R500_SRC_ALPHA_1_NO_READ;
 226                     }
 227                 }
 228             }
 229         }
 230
 231         /* Optimization: discard pixels which don't change the colorbuffer.
 232          *
 233          * The code below is non-trivial and some math is involved.
 234          *
 235          * Discarding pixels must be disabled when FP16 AA is enabled.
 236          * This is a hardware bug. Also, this implementation wouldn't work
 237          * with FP blending enabled and equation clamping disabled.
 238          *
 239          * Equations other than ADD are rarely used and therefore won't be
 240          * optimized. */
 241         if ((eqRGB == PIPE_BLEND_ADD || eqRGB == PIPE_BLEND_REVERSE_SUBTRACT) &&
 242             (eqA == PIPE_BLEND_ADD || eqA == PIPE_BLEND_REVERSE_SUBTRACT)) {
 243             /* ADD: X+Y
 244              * REVERSE_SUBTRACT: Y-X
 245              *
 246              * The idea is:
 247              * If X = src*srcFactor = 0 and Y = dst*dstFactor = 1,
 248              * then CB will not be changed.
 249              *
 250              * Given the srcFactor and dstFactor variables, we can derive
 251              * what src and dst should be equal to and discard appropriate
 252              * pixels.
 253              */
 254             if (blend_discard_if_src_alpha_0(srcRGB, srcA, dstRGB, dstA)) {
 255                 blend->blend_control |= R300_DISCARD_SRC_PIXELS_SRC_ALPHA_0;
 256             } else if (blend_discard_if_src_alpha_1(srcRGB, srcA,
 257                                                     dstRGB, dstA)) {
 258                 blend->blend_control |= R300_DISCARD_SRC_PIXELS_SRC_ALPHA_1;
 259             } else if (blend_discard_if_src_color_0(srcRGB, srcA,
 260                                                     dstRGB, dstA)) {
 261                 blend->blend_control |= R300_DISCARD_SRC_PIXELS_SRC_COLOR_0;
 262             } else if (blend_discard_if_src_color_1(srcRGB, srcA,
 263                                                     dstRGB, dstA)) {
 264                 blend->blend_control |= R300_DISCARD_SRC_PIXELS_SRC_COLOR_1;
 265             } else if (blend_discard_if_src_alpha_color_0(srcRGB, srcA,
 266                                                           dstRGB, dstA)) {
 267                 blend->blend_control |=
 268                     R300_DISCARD_SRC_PIXELS_SRC_ALPHA_COLOR_0;
 269             } else if (blend_discard_if_src_alpha_color_1(srcRGB, srcA,
 270                                                           dstRGB, dstA)) {
 271                 blend->blend_control |=
 272                     R300_DISCARD_SRC_PIXELS_SRC_ALPHA_COLOR_1;
 273             }
 274         }
 275
 276         /* separate alpha */
 277         if (srcA != srcRGB || dstA != dstRGB || eqA != eqRGB) {
 278             blend->blend_control |= R300_SEPARATE_ALPHA_ENABLE;
 279             blend->alpha_blend_control =
 280                 r300_translate_blend_function(eqA) |
 281                 (r300_translate_blend_factor(srcA) << R300_SRC_BLEND_SHIFT) |
 282                 (r300_translate_blend_factor(dstA) << R300_DST_BLEND_SHIFT);
 283         }
 284     }
 285
 286     /* PIPE_LOGICOP_* don't need to be translated, fortunately. */
 287     if (state->logicop_enable) {
 288         blend->rop = R300_RB3D_ROPCNTL_ROP_ENABLE |
 289                 (state->logicop_func) << R300_RB3D_ROPCNTL_ROP_SHIFT;
 290     }
 291
 292     /* Color Channel Mask */
 293     if (state->colormask & PIPE_MASK_R) {
 294         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_RED_MASK0;
 295     }
 296     if (state->colormask & PIPE_MASK_G) {
 297         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_GREEN_MASK0;
 298     }
 299     if (state->colormask & PIPE_MASK_B) {
 300         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_BLUE_MASK0;
 301     }
 302     if (state->colormask & PIPE_MASK_A) {
 303         blend->color_channel_mask |= RB3D_COLOR_CHANNEL_MASK_ALPHA_MASK0;
 304     }
 305
 306     if (state->dither) {
 307         blend->dither = R300_RB3D_DITHER_CTL_DITHER_MODE_LUT |
 308                 R300_RB3D_DITHER_CTL_ALPHA_DITHER_MODE_LUT;
 309     }
 310
 311     return (void*)blend;
 312 }
 313
 314 /* Bind blend state. */
 315 static void r300_bind_blend_state(struct pipe_context* pipe,
 316                                   void* state)
 317 {
 318     struct r300_context* r300 = r300_context(pipe);
 319
 320     r300->blend_state.state = state;
 321     r300->blend_state.dirty = TRUE;
 322 }
 323
 324 /* Free blend state. */
 325 static void r300_delete_blend_state(struct pipe_context* pipe,
 326                                     void* state)
 327 {
 328     FREE(state);
 329 }
 330
 331 /* Convert float to 10bit integer */
 332 static unsigned float_to_fixed10(float f)
 333 {
 334     return CLAMP((unsigned)(f * 1023.9f), 0, 1023);
 335 }
 336
 337 /* Set blend color.
 338  * Setup both R300 and R500 registers, figure out later which one to write. */
 339 static void r300_set_blend_color(struct pipe_context* pipe,
 340                                  const struct pipe_blend_color* color)
 341 {
 342     struct r300_context* r300 = r300_context(pipe);
 343     struct r300_blend_color_state* state =
 344         (struct r300_blend_color_state*)r300->blend_color_state.state;
 345     union util_color uc;
 346
 347     util_pack_color(color->color, PIPE_FORMAT_A8R8G8B8_UNORM, &uc);
 348     state->blend_color = uc.ui;
 349
 350     /* XXX if FP16 blending is enabled, we should use the FP16 format */
 351     state->blend_color_red_alpha =
 352         float_to_fixed10(color->color[0]) |
 353         (float_to_fixed10(color->color[3]) << 16);
 354     state->blend_color_green_blue =
 355         float_to_fixed10(color->color[2]) |
 356         (float_to_fixed10(color->color[1]) << 16);
 357
 358     r300->blend_color_state.dirty = TRUE;
 359 }
 360
 361 static void r300_set_clip_state(struct pipe_context* pipe,
 362                                 const struct pipe_clip_state* state)
 363 {
 364     struct r300_context* r300 = r300_context(pipe);
 365
 366     if (r300_screen(pipe->screen)->caps->has_tcl) {
 367         memcpy(r300->clip_state.state, state, sizeof(struct pipe_clip_state));
 368         r300->clip_state.dirty = TRUE;
 369     } else {
 370         draw_flush(r300->draw);
 371         draw_set_clip_state(r300->draw, state);
 372     }
 373 }
 374
 375 /* Create a new depth, stencil, and alpha state based on the CSO dsa state.
 376  *
 377  * This contains the depth buffer, stencil buffer, alpha test, and such.
 378  * On the Radeon, depth and stencil buffer setup are intertwined, which is
 379  * the reason for some of the strange-looking assignments across registers. */
 380 static void*
 381         r300_create_dsa_state(struct pipe_context* pipe,
 382                               const struct pipe_depth_stencil_alpha_state* state)
 383 {
 384     struct r300_capabilities *caps =
 385         r300_screen(r300_context(pipe)->context.screen)->caps;
 386     struct r300_dsa_state* dsa = CALLOC_STRUCT(r300_dsa_state);
 387
 388     /* Depth test setup. */
 389     if (state->depth.enabled) {
 390         dsa->z_buffer_control |= R300_Z_ENABLE;
 391
 392         if (state->depth.writemask) {
 393             dsa->z_buffer_control |= R300_Z_WRITE_ENABLE;
 394         }
 395
 396         dsa->z_stencil_control |=
 397             (r300_translate_depth_stencil_function(state->depth.func) <<
 398                 R300_Z_FUNC_SHIFT);
 399     }
 400
 401     /* Stencil buffer setup. */
 402     if (state->stencil[0].enabled) {
 403         dsa->z_buffer_control |= R300_STENCIL_ENABLE;
 404         dsa->z_stencil_control |=
 405             (r300_translate_depth_stencil_function(state->stencil[0].func) <<
 406                 R300_S_FRONT_FUNC_SHIFT) |
 407             (r300_translate_stencil_op(state->stencil[0].fail_op) <<
 408                 R300_S_FRONT_SFAIL_OP_SHIFT) |
 409             (r300_translate_stencil_op(state->stencil[0].zpass_op) <<
 410                 R300_S_FRONT_ZPASS_OP_SHIFT) |
 411             (r300_translate_stencil_op(state->stencil[0].zfail_op) <<
 412                 R300_S_FRONT_ZFAIL_OP_SHIFT);
 413
 414         dsa->stencil_ref_mask = (state->stencil[0].ref_value) |
 415                 (state->stencil[0].valuemask << R300_STENCILMASK_SHIFT) |
 416                 (state->stencil[0].writemask << R300_STENCILWRITEMASK_SHIFT);
 417
 418         if (state->stencil[1].enabled) {
 419             dsa->z_buffer_control |= R300_STENCIL_FRONT_BACK;
 420             dsa->z_stencil_control |=
 421             (r300_translate_depth_stencil_function(state->stencil[1].func) <<
 422                 R300_S_BACK_FUNC_SHIFT) |
 423             (r300_translate_stencil_op(state->stencil[1].fail_op) <<
 424                 R300_S_BACK_SFAIL_OP_SHIFT) |
 425             (r300_translate_stencil_op(state->stencil[1].zpass_op) <<
 426                 R300_S_BACK_ZPASS_OP_SHIFT) |
 427             (r300_translate_stencil_op(state->stencil[1].zfail_op) <<
 428                 R300_S_BACK_ZFAIL_OP_SHIFT);
 429
 430             /* XXX it seems r3xx doesn't support STENCILREFMASK_BF */
 431             if (caps->is_r500)
 432             {
 433                 dsa->z_buffer_control |= R500_STENCIL_REFMASK_FRONT_BACK;
 434                 dsa->stencil_ref_bf = (state->stencil[1].ref_value) |
 435                     (state->stencil[1].valuemask <<
 436                     R300_STENCILMASK_SHIFT) |
 437                     (state->stencil[1].writemask <<
 438                     R300_STENCILWRITEMASK_SHIFT);
 439             }
 440         }
 441     }
 442
 443     /* Alpha test setup. */
 444     if (state->alpha.enabled) {
 445         dsa->alpha_function =
 446             r300_translate_alpha_function(state->alpha.func) |
 447             R300_FG_ALPHA_FUNC_ENABLE;
 448
 449         /* XXX figure out why emitting 10bit alpha ref causes CS to dump */
 450         /* always use 8bit alpha ref */
 451         dsa->alpha_function |= float_to_ubyte(state->alpha.ref_value);
 452
 453         if (caps->is_r500)
 454             dsa->alpha_function |= R500_FG_ALPHA_FUNC_8BIT;
 455     }
 456
 457     return (void*)dsa;
 458 }
 459
 460 /* Bind DSA state. */
 461 static void r300_bind_dsa_state(struct pipe_context* pipe,
 462                                 void* state)
 463 {
 464     struct r300_context* r300 = r300_context(pipe);
 465
 466     r300->dsa_state.state = state;
 467     r300->dsa_state.dirty = TRUE;
 468 }
 469
 470 /* Free DSA state. */
 471 static void r300_delete_dsa_state(struct pipe_context* pipe,
 472                                   void* state)
 473 {
 474     FREE(state);
 475 }
 476
 477 static void r300_set_scissor_regs(const struct pipe_scissor_state* state,
 478                                   struct r300_scissor_regs *scissor,
 479                                   boolean is_r500)
 480 {
 481     if (is_r500) {
 482         scissor->top_left =
 483             (state->minx << R300_SCISSORS_X_SHIFT) |
 484             (state->miny << R300_SCISSORS_Y_SHIFT);
 485         scissor->bottom_right =
 486             ((state->maxx - 1) << R300_SCISSORS_X_SHIFT) |
 487             ((state->maxy - 1) << R300_SCISSORS_Y_SHIFT);
 488     } else {
 489         /* Offset of 1440 in non-R500 chipsets. */
 490         scissor->top_left =
 491             ((state->minx + 1440) << R300_SCISSORS_X_SHIFT) |
 492             ((state->miny + 1440) << R300_SCISSORS_Y_SHIFT);
 493         scissor->bottom_right =
 494             (((state->maxx - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 495             (((state->maxy - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 496     }
 497
 498     scissor->empty_area = state->minx >= state->maxx ||
 499                           state->miny >= state->maxy;
 500 }
 501
 502 static void
 503     r300_set_framebuffer_state(struct pipe_context* pipe,
 504                                const struct pipe_framebuffer_state* state)
 505 {
 506     struct r300_context* r300 = r300_context(pipe);
 507     struct pipe_scissor_state scissor;
 508
 509     if (r300->draw) {
 510         draw_flush(r300->draw);
 511     }
 512
 513     r300->framebuffer_state = *state;
 514
 515     scissor.minx = scissor.miny = 0;
 516     scissor.maxx = state->width;
 517     scissor.maxy = state->height;
 518     r300_set_scissor_regs(&scissor, &r300->scissor_state->framebuffer,
 519                           r300_screen(r300->context.screen)->caps->is_r500);
 520
 521     /* Don't rely on the order of states being set for the first time. */
 522     /* XXX ( >&) */
 523     if (!r300->rs_state.state) {
 524         r300->dirty_state |= R300_NEW_SCISSOR;
 525     }
 526     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 527
 528     r300->blend_state.dirty = TRUE;
 529     r300->dsa_state.dirty = TRUE;
 530 }
 531
 532 /* Create fragment shader state. */
 533 static void* r300_create_fs_state(struct pipe_context* pipe,
 534                                   const struct pipe_shader_state* shader)
 535 {
 536     struct r300_fragment_shader* fs = NULL;
 537
 538     fs = (struct r300_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 539
 540     /* Copy state directly into shader. */
 541     fs->state = *shader;
 542     fs->state.tokens = tgsi_dup_tokens(shader->tokens);
 543
 544     tgsi_scan_shader(shader->tokens, &fs->info);
 545     r300_shader_read_fs_inputs(&fs->info, &fs->inputs);
 546
 547     return (void*)fs;
 548 }
 549
 550 /* Bind fragment shader state. */
 551 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 552 {
 553     struct r300_context* r300 = r300_context(pipe);
 554     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 555
 556     if (fs == NULL) {
 557         r300->fs = NULL;
 558         return;
 559     }
 560
 561     r300->fs = fs;
 562     r300_pick_fragment_shader(r300);
 563
 564     if (r300->vs && r300_vertex_shader_setup_wpos(r300)) {
 565         r300->dirty_state |= R300_NEW_VERTEX_FORMAT;
 566     }
 567
 568     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER | R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 569 }
 570
 571 /* Delete fragment shader state. */
 572 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 573 {
 574     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 575     struct r300_fragment_shader_code *tmp, *ptr = fs->first;
 576
 577     while (ptr) {
 578         tmp = ptr;
 579         ptr = ptr->next;
 580         rc_constants_destroy(&tmp->code.constants);
 581         FREE(tmp);
 582     }
 583     FREE((void*)fs->state.tokens);
 584     FREE(shader);
 585 }
 586
 587 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 588                                      const struct pipe_poly_stipple* state)
 589 {
 590     /* XXX no idea how to set this up, but not terribly important */
 591 }
 592
 593 /* Create a new rasterizer state based on the CSO rasterizer state.
 594  *
 595  * This is a very large chunk of state, and covers most of the graphics
 596  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 597  *
 598  * In a not entirely unironic sidenote, this state has nearly nothing to do
 599  * with the actual block on the Radeon called the rasterizer (RS). */
 600 static void* r300_create_rs_state(struct pipe_context* pipe,
 601                                   const struct pipe_rasterizer_state* state)
 602 {
 603     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 604
 605     /* Copy rasterizer state for Draw. */
 606     rs->rs = *state;
 607
 608 #ifdef PIPE_ARCH_LITTLE_ENDIAN
 609     rs->vap_control_status = R300_VC_NO_SWAP;
 610 #else
 611     rs->vap_control_status = R300_VC_32BIT_SWAP;
 612 #endif
 613
 614     /* If bypassing TCL, or if no TCL engine is present, turn off the HW TCL.
 615      * Else, enable HW TCL and force Draw's TCL off. */
 616     if (state->bypass_vs_clip_and_viewport ||
 617             !r300_screen(pipe->screen)->caps->has_tcl) {
 618         rs->vap_control_status |= R300_VAP_TCL_BYPASS;
 619     }
 620
 621     rs->point_size = pack_float_16_6x(state->point_size) |
 622         (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);
 623
 624     rs->point_minmax =
 625         ((int)(state->point_size_min * 6.0) <<
 626          R300_GA_POINT_MINMAX_MIN_SHIFT) |
 627         ((int)(state->point_size_max * 6.0) <<
 628          R300_GA_POINT_MINMAX_MAX_SHIFT);
 629
 630     rs->line_control = pack_float_16_6x(state->line_width) |
 631         R300_GA_LINE_CNTL_END_TYPE_COMP;
 632
 633     /* XXX I think there is something wrong with the polygon mode,
 634      * XXX re-test when r300g is in a better shape */
 635
 636     /* Enable polygon mode */
 637     if (state->fill_cw != PIPE_POLYGON_MODE_FILL ||
 638         state->fill_ccw != PIPE_POLYGON_MODE_FILL) {
 639         rs->polygon_mode = R300_GA_POLY_MODE_DUAL;
 640     }
 641
 642     /* Radeons don't think in "CW/CCW", they think in "front/back". */
 643     if (state->front_winding == PIPE_WINDING_CW) {
 644         rs->cull_mode = R300_FRONT_FACE_CW;
 645
 646         /* Polygon offset */
 647         if (state->offset_cw) {
 648             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 649         }
 650         if (state->offset_ccw) {
 651             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 652         }
 653
 654         /* Polygon mode */
 655         if (rs->polygon_mode) {
 656             rs->polygon_mode |=
 657                 r300_translate_polygon_mode_front(state->fill_cw);
 658             rs->polygon_mode |=
 659                 r300_translate_polygon_mode_back(state->fill_ccw);
 660         }
 661     } else {
 662         rs->cull_mode = R300_FRONT_FACE_CCW;
 663
 664         /* Polygon offset */
 665         if (state->offset_ccw) {
 666             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 667         }
 668         if (state->offset_cw) {
 669             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 670         }
 671
 672         /* Polygon mode */
 673         if (rs->polygon_mode) {
 674             rs->polygon_mode |=
 675                 r300_translate_polygon_mode_front(state->fill_ccw);
 676             rs->polygon_mode |=
 677                 r300_translate_polygon_mode_back(state->fill_cw);
 678         }
 679     }
 680     if (state->front_winding & state->cull_mode) {
 681         rs->cull_mode |= R300_CULL_FRONT;
 682     }
 683     if (~(state->front_winding) & state->cull_mode) {
 684         rs->cull_mode |= R300_CULL_BACK;
 685     }
 686
 687     if (rs->polygon_offset_enable) {
 688         rs->depth_offset_front = rs->depth_offset_back =
 689             fui(state->offset_units);
 690         rs->depth_scale_front = rs->depth_scale_back =
 691             fui(state->offset_scale);
 692     }
 693
 694     if (state->line_stipple_enable) {
 695         rs->line_stipple_config =
 696             R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
 697             (fui((float)state->line_stipple_factor) &
 698                 R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
 699         /* XXX this might need to be scaled up */
 700         rs->line_stipple_value = state->line_stipple_pattern;
 701     }
 702
 703     if (state->flatshade) {
 704         rs->color_control = R300_SHADE_MODEL_FLAT;
 705     } else {
 706         rs->color_control = R300_SHADE_MODEL_SMOOTH;
 707     }
 708
 709     return (void*)rs;
 710 }
 711
 712 /* Bind rasterizer state. */
 713 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 714 {
 715     struct r300_context* r300 = r300_context(pipe);
 716     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 717
 718     if (r300->draw) {
 719         draw_flush(r300->draw);
 720         draw_set_rasterizer_state(r300->draw, &rs->rs);
 721     }
 722
 723     r300->tcl_bypass = rs->rs.bypass_vs_clip_and_viewport;
 724
 725     r300->rs_state.state = rs;
 726     r300->rs_state.dirty = TRUE;
 727     /* XXX Why is this still needed, dammit!? */
 728     r300->viewport_state.dirty = TRUE;
 729
 730     /* XXX Clean these up when we move to atom emits */
 731     r300->dirty_state |= R300_NEW_RS_BLOCK;
 732     r300->dirty_state |= R300_NEW_SCISSOR;
 733     if (r300->fs && r300->fs->inputs.wpos != ATTR_UNUSED) {
 734         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 735     }
 736 }
 737
 738 /* Free rasterizer state. */
 739 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 740 {
 741     FREE(state);
 742 }
 743
 744 static void*
 745         r300_create_sampler_state(struct pipe_context* pipe,
 746                                   const struct pipe_sampler_state* state)
 747 {
 748     struct r300_context* r300 = r300_context(pipe);
 749     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 750     int lod_bias;
 751     union util_color uc;
 752
 753     sampler->state = *state;
 754
 755     sampler->filter0 |=
 756         (r300_translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 757         (r300_translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 758         (r300_translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 759
 760     sampler->filter0 |= r300_translate_tex_filters(state->min_img_filter,
 761                                                    state->mag_img_filter,
 762                                                    state->min_mip_filter,
 763                                                    state->max_anisotropy > 1.0);
 764
 765     /* Unfortunately, r300-r500 don't support floating-point mipmap lods. */
 766     /* We must pass these to the emit function to clamp them properly. */
 767     sampler->min_lod = MAX2((unsigned)state->min_lod, 0);
 768     sampler->max_lod = MAX2((unsigned)ceilf(state->max_lod), 0);
 769
 770     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 771
 772     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 773
 774     sampler->filter1 |= r300_anisotropy(state->max_anisotropy);
 775
 776     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM, &uc);
 777     sampler->border_color = uc.ui;
 778
 779     /* R500-specific fixups and optimizations */
 780     if (r300_screen(r300->context.screen)->caps->is_r500) {
 781         sampler->filter1 |= R500_BORDER_FIX;
 782     }
 783
 784     return (void*)sampler;
 785 }
 786
 787 static void r300_bind_sampler_states(struct pipe_context* pipe,
 788                                      unsigned count,
 789                                      void** states)
 790 {
 791     struct r300_context* r300 = r300_context(pipe);
 792     int i;
 793
 794     if (count > 8) {
 795         return;
 796     }
 797
 798     for (i = 0; i < count; i++) {
 799         if (r300->sampler_states[i] != states[i]) {
 800             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 801             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 802         }
 803     }
 804
 805     r300->sampler_count = count;
 806
 807     /* Pick a fragment shader based on the texture compare state. */
 808     if (r300->fs && (r300->dirty_state & R300_ANY_NEW_SAMPLERS)) {
 809         if (r300_pick_fragment_shader(r300)) {
 810             r300->dirty_state |= R300_NEW_FRAGMENT_SHADER |
 811                                  R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 812         }
 813     }
 814 }
 815
 816 static void r300_lacks_vertex_textures(struct pipe_context* pipe,
 817                                        unsigned count,
 818                                        void** states)
 819 {
 820 }
 821
 822 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 823 {
 824     FREE(state);
 825 }
 826
 827 static void r300_set_sampler_textures(struct pipe_context* pipe,
 828                                       unsigned count,
 829                                       struct pipe_texture** texture)
 830 {
 831     struct r300_context* r300 = r300_context(pipe);
 832     boolean is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
 833     int i;
 834
 835     /* XXX magic num */
 836     if (count > 8) {
 837         return;
 838     }
 839
 840     for (i = 0; i < count; i++) {
 841         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 842             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 843                 texture[i]);
 844             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 845
 846             /* R300-specific - set the texrect factor in a fragment shader */
 847             if (!is_r500 && r300->textures[i]->is_npot) {
 848                 /* XXX It would be nice to re-emit just 1 constant,
 849                  * XXX not all of them */
 850                 r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 851             }
 852         }
 853     }
 854
 855     for (i = count; i < 8; i++) {
 856         if (r300->textures[i]) {
 857             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 858                 NULL);
 859             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 860         }
 861     }
 862
 863     r300->texture_count = count;
 864 }
 865
 866 static void r300_set_scissor_state(struct pipe_context* pipe,
 867                                    const struct pipe_scissor_state* state)
 868 {
 869     struct r300_context* r300 = r300_context(pipe);
 870
 871     r300_set_scissor_regs(state, &r300->scissor_state->scissor,
 872                           r300_screen(r300->context.screen)->caps->is_r500);
 873
 874     r300->dirty_state |= R300_NEW_SCISSOR;
 875 }
 876
 877 static void r300_set_viewport_state(struct pipe_context* pipe,
 878                                     const struct pipe_viewport_state* state)
 879 {
 880     struct r300_context* r300 = r300_context(pipe);
 881     struct r300_viewport_state* viewport =
 882         (struct r300_viewport_state*)r300->viewport_state.state;
 883
 884     /* Do the transform in HW. */
 885     viewport->vte_control = R300_VTX_W0_FMT;
 886
 887     if (state->scale[0] != 1.0f) {
 888         viewport->xscale = state->scale[0];
 889         viewport->vte_control |= R300_VPORT_X_SCALE_ENA;
 890     }
 891     if (state->scale[1] != 1.0f) {
 892         viewport->yscale = state->scale[1];
 893         viewport->vte_control |= R300_VPORT_Y_SCALE_ENA;
 894     }
 895     if (state->scale[2] != 1.0f) {
 896         viewport->zscale = state->scale[2];
 897         viewport->vte_control |= R300_VPORT_Z_SCALE_ENA;
 898     }
 899     if (state->translate[0] != 0.0f) {
 900         viewport->xoffset = state->translate[0];
 901         viewport->vte_control |= R300_VPORT_X_OFFSET_ENA;
 902     }
 903     if (state->translate[1] != 0.0f) {
 904         viewport->yoffset = state->translate[1];
 905         viewport->vte_control |= R300_VPORT_Y_OFFSET_ENA;
 906     }
 907     if (state->translate[2] != 0.0f) {
 908         viewport->zoffset = state->translate[2];
 909         viewport->vte_control |= R300_VPORT_Z_OFFSET_ENA;
 910     }
 911
 912     r300->viewport_state.dirty = TRUE;
 913     if (r300->fs && r300->fs->inputs.wpos != ATTR_UNUSED) {
 914         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 915     }
 916 }
 917
 918 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 919                                     unsigned count,
 920                                     const struct pipe_vertex_buffer* buffers)
 921 {
 922     struct r300_context* r300 = r300_context(pipe);
 923
 924     memcpy(r300->vertex_buffer, buffers,
 925         sizeof(struct pipe_vertex_buffer) * count);
 926     r300->vertex_buffer_count = count;
 927
 928     if (r300->draw) {
 929         draw_flush(r300->draw);
 930         draw_set_vertex_buffers(r300->draw, count, buffers);
 931     }
 932
 933     r300->dirty_state |= R300_NEW_VERTEX_FORMAT;
 934 }
 935
 936 static void r300_set_vertex_elements(struct pipe_context* pipe,
 937                                     unsigned count,
 938                                     const struct pipe_vertex_element* elements)
 939 {
 940     struct r300_context* r300 = r300_context(pipe);
 941
 942     memcpy(r300->vertex_element,
 943            elements,
 944            sizeof(struct pipe_vertex_element) * count);
 945     r300->vertex_element_count = count;
 946
 947     if (r300->draw) {
 948         draw_flush(r300->draw);
 949         draw_set_vertex_elements(r300->draw, count, elements);
 950     }
 951 }
 952
 953 static void* r300_create_vs_state(struct pipe_context* pipe,
 954                                   const struct pipe_shader_state* shader)
 955 {
 956     struct r300_context* r300 = r300_context(pipe);
 957
 958     if (r300_screen(pipe->screen)->caps->has_tcl) {
 959         struct r300_vertex_shader* vs = CALLOC_STRUCT(r300_vertex_shader);
 960         /* Copy state directly into shader. */
 961         vs->state = *shader;
 962         vs->state.tokens = tgsi_dup_tokens(shader->tokens);
 963
 964         tgsi_scan_shader(shader->tokens, &vs->info);
 965
 966         return (void*)vs;
 967     } else {
 968         return draw_create_vertex_shader(r300->draw, shader);
 969     }
 970 }
 971
 972 static void r300_bind_vs_state(struct pipe_context* pipe, void* shader)
 973 {
 974     struct r300_context* r300 = r300_context(pipe);
 975
 976     if (r300_screen(pipe->screen)->caps->has_tcl) {
 977         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 978
 979         if (vs == NULL) {
 980             r300->vs = NULL;
 981             return;
 982         } else if (!vs->translated) {
 983             r300_translate_vertex_shader(r300, vs);
 984         }
 985
 986         r300->vs = vs;
 987         if (r300->fs) {
 988             r300_vertex_shader_setup_wpos(r300);
 989         }
 990
 991         r300->dirty_state |=
 992             R300_NEW_VERTEX_SHADER | R300_NEW_VERTEX_SHADER_CONSTANTS |
 993             R300_NEW_VERTEX_FORMAT;
 994     } else {
 995         draw_flush(r300->draw);
 996         draw_bind_vertex_shader(r300->draw,
 997                 (struct draw_vertex_shader*)shader);
 998     }
 999 }
1000
1001 static void r300_delete_vs_state(struct pipe_context* pipe, void* shader)
1002 {
1003     struct r300_context* r300 = r300_context(pipe);
1004
1005     if (r300_screen(pipe->screen)->caps->has_tcl) {
1006         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
1007
1008         rc_constants_destroy(&vs->code.constants);
1009         FREE((void*)vs->state.tokens);
1010         FREE(shader);
1011     } else {
1012         draw_delete_vertex_shader(r300->draw,
1013                 (struct draw_vertex_shader*)shader);
1014     }
1015 }
1016
1017 static void r300_set_constant_buffer(struct pipe_context *pipe,
1018                                      uint shader, uint index,
1019                                      const struct pipe_constant_buffer *buf)
1020 {
1021     struct r300_context* r300 = r300_context(pipe);
1022     void *mapped;
1023
1024     if (buf == NULL || buf->buffer->size == 0 ||
1025         (mapped = pipe_buffer_map(pipe->screen, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)) == NULL)
1026     {
1027         r300->shader_constants[shader].count = 0;
1028         return;
1029     }
1030
1031     assert((buf->buffer->size % 4 * sizeof(float)) == 0);
1032     memcpy(r300->shader_constants[shader].constants, mapped, buf->buffer->size);
1033     r300->shader_constants[shader].count = buf->buffer->size / (4 * sizeof(float));
1034     pipe_buffer_unmap(pipe->screen, buf->buffer);
1035
1036     if (shader == PIPE_SHADER_VERTEX)
1037         r300->dirty_state |= R300_NEW_VERTEX_SHADER_CONSTANTS;
1038     else if (shader == PIPE_SHADER_FRAGMENT)
1039         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
1040 }
1041
1042 void r300_init_state_functions(struct r300_context* r300)
1043 {
1044     r300->context.create_blend_state = r300_create_blend_state;
1045     r300->context.bind_blend_state = r300_bind_blend_state;
1046     r300->context.delete_blend_state = r300_delete_blend_state;
1047
1048     r300->context.set_blend_color = r300_set_blend_color;
1049
1050     r300->context.set_clip_state = r300_set_clip_state;
1051
1052     r300->context.set_constant_buffer = r300_set_constant_buffer;
1053
1054     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
1055     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
1056     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
1057
1058     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
1059
1060     r300->context.create_fs_state = r300_create_fs_state;
1061     r300->context.bind_fs_state = r300_bind_fs_state;
1062     r300->context.delete_fs_state = r300_delete_fs_state;
1063
1064     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
1065
1066     r300->context.create_rasterizer_state = r300_create_rs_state;
1067     r300->context.bind_rasterizer_state = r300_bind_rs_state;
1068     r300->context.delete_rasterizer_state = r300_delete_rs_state;
1069
1070     r300->context.create_sampler_state = r300_create_sampler_state;
1071     r300->context.bind_fragment_sampler_states = r300_bind_sampler_states;
1072     r300->context.bind_vertex_sampler_states = r300_lacks_vertex_textures;
1073     r300->context.delete_sampler_state = r300_delete_sampler_state;
1074
1075     r300->context.set_fragment_sampler_textures = r300_set_sampler_textures;
1076
1077     r300->context.set_scissor_state = r300_set_scissor_state;
1078
1079     r300->context.set_viewport_state = r300_set_viewport_state;
1080
1081     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
1082     r300->context.set_vertex_elements = r300_set_vertex_elements;
1083
1084     r300->context.create_vs_state = r300_create_vs_state;
1085     r300->context.bind_vs_state = r300_bind_vs_state;
1086     r300->context.delete_vs_state = r300_delete_vs_state;
1087 }