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
 155     util_pack_color(color->color, PIPE_FORMAT_A8R8G8B8_UNORM,
 156             &r300->blend_color_state->blend_color);
 157
 158     /* XXX if FP16 blending is enabled, we should use the FP16 format */
 159     r300->blend_color_state->blend_color_red_alpha =
 160         float_to_fixed10(color->color[0]) |
 161         (float_to_fixed10(color->color[3]) << 16);
 162     r300->blend_color_state->blend_color_green_blue =
 163         float_to_fixed10(color->color[2]) |
 164         (float_to_fixed10(color->color[1]) << 16);
 165
 166     r300->dirty_state |= R300_NEW_BLEND_COLOR;
 167 }
 168
 169 static void r300_set_clip_state(struct pipe_context* pipe,
 170                                 const struct pipe_clip_state* state)
 171 {
 172     struct r300_context* r300 = r300_context(pipe);
 173
 174     if (r300_screen(pipe->screen)->caps->has_tcl) {
 175         r300->clip_state = *state;
 176         r300->dirty_state |= R300_NEW_CLIP;
 177     } else {
 178         draw_flush(r300->draw);
 179         draw_set_clip_state(r300->draw, state);
 180     }
 181 }
 182
 183 /* Create a new depth, stencil, and alpha state based on the CSO dsa state.
 184  *
 185  * This contains the depth buffer, stencil buffer, alpha test, and such.
 186  * On the Radeon, depth and stencil buffer setup are intertwined, which is
 187  * the reason for some of the strange-looking assignments across registers. */
 188 static void*
 189         r300_create_dsa_state(struct pipe_context* pipe,
 190                               const struct pipe_depth_stencil_alpha_state* state)
 191 {
 192     struct r300_capabilities *caps =
 193         r300_screen(r300_context(pipe)->context.screen)->caps;
 194     struct r300_dsa_state* dsa = CALLOC_STRUCT(r300_dsa_state);
 195
 196     /* Depth test setup. */
 197     if (state->depth.enabled) {
 198         dsa->z_buffer_control |= R300_Z_ENABLE;
 199
 200         if (state->depth.writemask) {
 201             dsa->z_buffer_control |= R300_Z_WRITE_ENABLE;
 202         }
 203
 204         dsa->z_stencil_control |=
 205             (r300_translate_depth_stencil_function(state->depth.func) <<
 206                 R300_Z_FUNC_SHIFT);
 207     }
 208
 209     /* Stencil buffer setup. */
 210     if (state->stencil[0].enabled) {
 211         dsa->z_buffer_control |= R300_STENCIL_ENABLE;
 212         dsa->z_stencil_control |=
 213             (r300_translate_depth_stencil_function(state->stencil[0].func) <<
 214                 R300_S_FRONT_FUNC_SHIFT) |
 215             (r300_translate_stencil_op(state->stencil[0].fail_op) <<
 216                 R300_S_FRONT_SFAIL_OP_SHIFT) |
 217             (r300_translate_stencil_op(state->stencil[0].zpass_op) <<
 218                 R300_S_FRONT_ZPASS_OP_SHIFT) |
 219             (r300_translate_stencil_op(state->stencil[0].zfail_op) <<
 220                 R300_S_FRONT_ZFAIL_OP_SHIFT);
 221
 222         dsa->stencil_ref_mask = (state->stencil[0].ref_value) |
 223                 (state->stencil[0].valuemask << R300_STENCILMASK_SHIFT) |
 224                 (state->stencil[0].writemask << R300_STENCILWRITEMASK_SHIFT);
 225
 226         if (state->stencil[1].enabled) {
 227             dsa->z_buffer_control |= R300_STENCIL_FRONT_BACK;
 228             dsa->z_stencil_control |=
 229             (r300_translate_depth_stencil_function(state->stencil[1].func) <<
 230                 R300_S_BACK_FUNC_SHIFT) |
 231             (r300_translate_stencil_op(state->stencil[1].fail_op) <<
 232                 R300_S_BACK_SFAIL_OP_SHIFT) |
 233             (r300_translate_stencil_op(state->stencil[1].zpass_op) <<
 234                 R300_S_BACK_ZPASS_OP_SHIFT) |
 235             (r300_translate_stencil_op(state->stencil[1].zfail_op) <<
 236                 R300_S_BACK_ZFAIL_OP_SHIFT);
 237
 238             /* XXX it seems r3xx doesn't support STENCILREFMASK_BF */
 239             if (caps->is_r500)
 240             {
 241                 dsa->z_buffer_control |= R500_STENCIL_REFMASK_FRONT_BACK;
 242                 dsa->stencil_ref_bf = (state->stencil[1].ref_value) |
 243                     (state->stencil[1].valuemask <<
 244                     R300_STENCILMASK_SHIFT) |
 245                     (state->stencil[1].writemask <<
 246                     R300_STENCILWRITEMASK_SHIFT);
 247             }
 248         }
 249     }
 250
 251     /* Alpha test setup. */
 252     if (state->alpha.enabled) {
 253         dsa->alpha_function =
 254             r300_translate_alpha_function(state->alpha.func) |
 255             R300_FG_ALPHA_FUNC_ENABLE;
 256
 257         /* XXX figure out why emitting 10bit alpha ref causes CS to dump */
 258         /* always use 8bit alpha ref */
 259         dsa->alpha_function |= float_to_ubyte(state->alpha.ref_value);
 260
 261         if (caps->is_r500)
 262             dsa->alpha_function |= R500_FG_ALPHA_FUNC_8BIT;
 263     }
 264
 265     return (void*)dsa;
 266 }
 267
 268 /* Bind DSA state. */
 269 static void r300_bind_dsa_state(struct pipe_context* pipe,
 270                                 void* state)
 271 {
 272     struct r300_context* r300 = r300_context(pipe);
 273
 274     r300->dsa_state = (struct r300_dsa_state*)state;
 275     r300->dirty_state |= R300_NEW_DSA;
 276 }
 277
 278 /* Free DSA state. */
 279 static void r300_delete_dsa_state(struct pipe_context* pipe,
 280                                   void* state)
 281 {
 282     FREE(state);
 283 }
 284
 285 static void r300_set_edgeflags(struct pipe_context* pipe,
 286                                const unsigned* bitfield)
 287 {
 288     /* XXX you know it's bad when i915 has this blank too */
 289     /* XXX and even worse, I have no idea WTF the bitfield is */
 290 }
 291
 292 static void
 293     r300_set_framebuffer_state(struct pipe_context* pipe,
 294                                const struct pipe_framebuffer_state* state)
 295 {
 296     struct r300_context* r300 = r300_context(pipe);
 297
 298     if (r300->draw) {
 299         draw_flush(r300->draw);
 300     }
 301
 302     r300->framebuffer_state = *state;
 303
 304     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 305
 306     if (r300_screen(r300->context.screen)->caps->is_r500) {
 307         r300->scissor_state->no_scissor_top_left =
 308             (0 << R300_SCISSORS_X_SHIFT) |
 309             (0 << R300_SCISSORS_Y_SHIFT);
 310         r300->scissor_state->no_scissor_bottom_right =
 311             ((state->width - 1) << R300_SCISSORS_X_SHIFT) |
 312             ((state->height - 1) << R300_SCISSORS_Y_SHIFT);
 313     } else {
 314         /* Offset of 1440 in non-R500 chipsets. */
 315         r300->scissor_state->no_scissor_top_left =
 316             ((0 + 1440) << R300_SCISSORS_X_SHIFT) |
 317             ((0 + 1440) << R300_SCISSORS_Y_SHIFT);
 318         r300->scissor_state->no_scissor_bottom_right =
 319             (((state->width - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 320             (((state->height - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 321     }
 322
 323     r300->dirty_state |= R300_NEW_SCISSOR;
 324 }
 325
 326 /* Create fragment shader state. */
 327 static void* r300_create_fs_state(struct pipe_context* pipe,
 328                                   const struct pipe_shader_state* shader)
 329 {
 330     struct r300_fragment_shader* fs = NULL;
 331
 332     fs = (struct r300_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 333
 334     /* Copy state directly into shader. */
 335     fs->state = *shader;
 336     fs->state.tokens = tgsi_dup_tokens(shader->tokens);
 337
 338     tgsi_scan_shader(shader->tokens, &fs->info);
 339
 340     return (void*)fs;
 341 }
 342
 343 /* Bind fragment shader state. */
 344 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 345 {
 346     struct r300_context* r300 = r300_context(pipe);
 347     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 348
 349     if (fs == NULL) {
 350         r300->fs = NULL;
 351         return;
 352     } else if (!fs->translated) {
 353         r300_translate_fragment_shader(r300, fs);
 354     }
 355
 356     r300->fs = fs;
 357
 358     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER | R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 359 }
 360
 361 /* Delete fragment shader state. */
 362 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 363 {
 364     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 365     rc_constants_destroy(&fs->code.constants);
 366     FREE((void*)fs->state.tokens);
 367     FREE(shader);
 368 }
 369
 370 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 371                                      const struct pipe_poly_stipple* state)
 372 {
 373     /* XXX no idea how to set this up, but not terribly important */
 374 }
 375
 376 /* Create a new rasterizer state based on the CSO rasterizer state.
 377  *
 378  * This is a very large chunk of state, and covers most of the graphics
 379  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 380  *
 381  * In a not entirely unironic sidenote, this state has nearly nothing to do
 382  * with the actual block on the Radeon called the rasterizer (RS). */
 383 static void* r300_create_rs_state(struct pipe_context* pipe,
 384                                   const struct pipe_rasterizer_state* state)
 385 {
 386     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 387
 388     /* Copy rasterizer state for Draw. */
 389     rs->rs = *state;
 390
 391     rs->enable_vte = !state->bypass_vs_clip_and_viewport;
 392
 393 #ifdef PIPE_ARCH_LITTLE_ENDIAN
 394     rs->vap_control_status = R300_VC_NO_SWAP;
 395 #else
 396     rs->vap_control_status = R300_VC_32BIT_SWAP;
 397 #endif
 398
 399     /* If bypassing TCL, or if no TCL engine is present, turn off the HW TCL.
 400      * Else, enable HW TCL and force Draw's TCL off. */
 401     if (state->bypass_vs_clip_and_viewport ||
 402             !r300_screen(pipe->screen)->caps->has_tcl) {
 403         rs->vap_control_status |= R300_VAP_TCL_BYPASS;
 404     } else {
 405         rs->rs.bypass_vs_clip_and_viewport = TRUE;
 406     }
 407
 408     rs->point_size = pack_float_16_6x(state->point_size) |
 409         (pack_float_16_6x(state->point_size) << R300_POINTSIZE_X_SHIFT);
 410
 411     rs->point_minmax =
 412         ((int)(state->point_size_min * 6.0) <<
 413          R300_GA_POINT_MINMAX_MIN_SHIFT) |
 414         ((int)(state->point_size_max * 6.0) <<
 415          R300_GA_POINT_MINMAX_MAX_SHIFT);
 416
 417     rs->line_control = pack_float_16_6x(state->line_width) |
 418         R300_GA_LINE_CNTL_END_TYPE_COMP;
 419
 420     /* XXX I think there is something wrong with the polygon mode,
 421      * XXX re-test when r300g is in a better shape */
 422
 423     /* Enable polygon mode */
 424     if (state->fill_cw != PIPE_POLYGON_MODE_FILL ||
 425         state->fill_ccw != PIPE_POLYGON_MODE_FILL) {
 426         rs->polygon_mode = R300_GA_POLY_MODE_DUAL;
 427     }
 428
 429     /* Radeons don't think in "CW/CCW", they think in "front/back". */
 430     if (state->front_winding == PIPE_WINDING_CW) {
 431         rs->cull_mode = R300_FRONT_FACE_CW;
 432
 433         /* Polygon offset */
 434         if (state->offset_cw) {
 435             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 436         }
 437         if (state->offset_ccw) {
 438             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 439         }
 440
 441         /* Polygon mode */
 442         if (rs->polygon_mode) {
 443             rs->polygon_mode |=
 444                 r300_translate_polygon_mode_front(state->fill_cw);
 445             rs->polygon_mode |=
 446                 r300_translate_polygon_mode_back(state->fill_ccw);
 447         }
 448     } else {
 449         rs->cull_mode = R300_FRONT_FACE_CCW;
 450
 451         /* Polygon offset */
 452         if (state->offset_ccw) {
 453             rs->polygon_offset_enable |= R300_FRONT_ENABLE;
 454         }
 455         if (state->offset_cw) {
 456             rs->polygon_offset_enable |= R300_BACK_ENABLE;
 457         }
 458
 459         /* Polygon mode */
 460         if (rs->polygon_mode) {
 461             rs->polygon_mode |=
 462                 r300_translate_polygon_mode_front(state->fill_ccw);
 463             rs->polygon_mode |=
 464                 r300_translate_polygon_mode_back(state->fill_cw);
 465         }
 466     }
 467     if (state->front_winding & state->cull_mode) {
 468         rs->cull_mode |= R300_CULL_FRONT;
 469     }
 470     if (~(state->front_winding) & state->cull_mode) {
 471         rs->cull_mode |= R300_CULL_BACK;
 472     }
 473
 474     if (rs->polygon_offset_enable) {
 475         rs->depth_offset_front = rs->depth_offset_back =
 476             fui(state->offset_units);
 477         rs->depth_scale_front = rs->depth_scale_back =
 478             fui(state->offset_scale);
 479     }
 480
 481     if (state->line_stipple_enable) {
 482         rs->line_stipple_config =
 483             R300_GA_LINE_STIPPLE_CONFIG_LINE_RESET_LINE |
 484             (fui((float)state->line_stipple_factor) &
 485                 R300_GA_LINE_STIPPLE_CONFIG_STIPPLE_SCALE_MASK);
 486         /* XXX this might need to be scaled up */
 487         rs->line_stipple_value = state->line_stipple_pattern;
 488     }
 489
 490     if (state->flatshade) {
 491         rs->color_control = R300_SHADE_MODEL_FLAT;
 492     } else {
 493         rs->color_control = R300_SHADE_MODEL_SMOOTH;
 494     }
 495
 496     if (!state->flatshade_first) {
 497         rs->color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
 498     }
 499
 500     return (void*)rs;
 501 }
 502
 503 /* Bind rasterizer state. */
 504 static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 505 {
 506     struct r300_context* r300 = r300_context(pipe);
 507     struct r300_rs_state* rs = (struct r300_rs_state*)state;
 508
 509     if (r300->draw) {
 510         draw_flush(r300->draw);
 511         draw_set_rasterizer_state(r300->draw, &rs->rs);
 512     }
 513
 514     r300->rs_state = rs;
 515     /* XXX Clean these up when we move to atom emits */
 516     r300->dirty_state |= R300_NEW_RASTERIZER;
 517     r300->dirty_state |= R300_NEW_RS_BLOCK;
 518     r300->dirty_state |= R300_NEW_SCISSOR;
 519     r300->dirty_state |= R300_NEW_VIEWPORT;
 520 }
 521
 522 /* Free rasterizer state. */
 523 static void r300_delete_rs_state(struct pipe_context* pipe, void* state)
 524 {
 525     FREE(state);
 526 }
 527
 528 static void*
 529         r300_create_sampler_state(struct pipe_context* pipe,
 530                                   const struct pipe_sampler_state* state)
 531 {
 532     struct r300_context* r300 = r300_context(pipe);
 533     struct r300_sampler_state* sampler = CALLOC_STRUCT(r300_sampler_state);
 534     int lod_bias;
 535
 536     sampler->filter0 |=
 537         (r300_translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 538         (r300_translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 539         (r300_translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 540
 541     sampler->filter0 |= r300_translate_tex_filters(state->min_img_filter,
 542                                                    state->mag_img_filter,
 543                                                    state->min_mip_filter);
 544
 545     /* Unfortunately, r300-r500 don't support floating-point mipmap lods. */
 546     /* We must pass these to the emit function to clamp them properly. */
 547     sampler->min_lod = MAX2((unsigned)state->min_lod, 0);
 548     sampler->max_lod = MAX2((unsigned)ceilf(state->max_lod), 0);
 549
 550     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 551
 552     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 553
 554     sampler->filter1 |= r300_anisotropy(state->max_anisotropy);
 555
 556     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM,
 557                     &sampler->border_color);
 558
 559     /* R500-specific fixups and optimizations */
 560     if (r300_screen(r300->context.screen)->caps->is_r500) {
 561         sampler->filter1 |= R500_BORDER_FIX;
 562     }
 563
 564     return (void*)sampler;
 565 }
 566
 567 static void r300_bind_sampler_states(struct pipe_context* pipe,
 568                                      unsigned count,
 569                                      void** states)
 570 {
 571     struct r300_context* r300 = r300_context(pipe);
 572     int i;
 573
 574     if (count > 8) {
 575         return;
 576     }
 577
 578     for (i = 0; i < count; i++) {
 579         if (r300->sampler_states[i] != states[i]) {
 580             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 581             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 582         }
 583     }
 584
 585     r300->sampler_count = count;
 586 }
 587
 588 static void r300_lacks_vertex_textures(struct pipe_context* pipe,
 589                                        unsigned count,
 590                                        void** states)
 591 {
 592 }
 593
 594 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 595 {
 596     FREE(state);
 597 }
 598
 599 static void r300_set_sampler_textures(struct pipe_context* pipe,
 600                                       unsigned count,
 601                                       struct pipe_texture** texture)
 602 {
 603     struct r300_context* r300 = r300_context(pipe);
 604     boolean is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
 605     int i;
 606
 607     /* XXX magic num */
 608     if (count > 8) {
 609         return;
 610     }
 611
 612     r300->context.flush(&r300->context, 0, NULL);
 613
 614     for (i = 0; i < count; i++) {
 615         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 616             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 617                 texture[i]);
 618             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 619
 620             /* R300-specific - set the texrect factor in a fragment shader */
 621             if (!is_r500 && r300->textures[i]->is_npot) {
 622                 /* XXX It would be nice to re-emit just 1 constant,
 623                  * XXX not all of them */
 624                 r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 625             }
 626         }
 627     }
 628
 629     for (i = count; i < 8; i++) {
 630         if (r300->textures[i]) {
 631             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 632                 NULL);
 633             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 634         }
 635     }
 636
 637     r300->texture_count = count;
 638 }
 639
 640 static void r300_set_scissor_state(struct pipe_context* pipe,
 641                                    const struct pipe_scissor_state* state)
 642 {
 643     struct r300_context* r300 = r300_context(pipe);
 644
 645     if (r300_screen(r300->context.screen)->caps->is_r500) {
 646         r300->scissor_state->scissor_top_left =
 647             (state->minx << R300_SCISSORS_X_SHIFT) |
 648             (state->miny << R300_SCISSORS_Y_SHIFT);
 649         r300->scissor_state->scissor_bottom_right =
 650             ((state->maxx - 1) << R300_SCISSORS_X_SHIFT) |
 651             ((state->maxy - 1) << R300_SCISSORS_Y_SHIFT);
 652     } else {
 653         /* Offset of 1440 in non-R500 chipsets. */
 654         r300->scissor_state->scissor_top_left =
 655             ((state->minx + 1440) << R300_SCISSORS_X_SHIFT) |
 656             ((state->miny + 1440) << R300_SCISSORS_Y_SHIFT);
 657         r300->scissor_state->scissor_bottom_right =
 658             (((state->maxx - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 659             (((state->maxy - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 660     }
 661
 662     r300->dirty_state |= R300_NEW_SCISSOR;
 663 }
 664
 665 static void r300_set_viewport_state(struct pipe_context* pipe,
 666                                     const struct pipe_viewport_state* state)
 667 {
 668     struct r300_context* r300 = r300_context(pipe);
 669
 670     /* Do the transform in HW. */
 671     r300->viewport_state->vte_control = R300_VTX_W0_FMT;
 672
 673     if (state->scale[0] != 1.0f) {
 674         r300->viewport_state->xscale = state->scale[0];
 675         r300->viewport_state->vte_control |= R300_VPORT_X_SCALE_ENA;
 676     }
 677     if (state->scale[1] != 1.0f) {
 678         r300->viewport_state->yscale = state->scale[1];
 679         r300->viewport_state->vte_control |= R300_VPORT_Y_SCALE_ENA;
 680     }
 681     if (state->scale[2] != 1.0f) {
 682         r300->viewport_state->zscale = state->scale[2];
 683         r300->viewport_state->vte_control |= R300_VPORT_Z_SCALE_ENA;
 684     }
 685     if (state->translate[0] != 0.0f) {
 686         r300->viewport_state->xoffset = state->translate[0];
 687         r300->viewport_state->vte_control |= R300_VPORT_X_OFFSET_ENA;
 688     }
 689     if (state->translate[1] != 0.0f) {
 690         r300->viewport_state->yoffset = state->translate[1];
 691         r300->viewport_state->vte_control |= R300_VPORT_Y_OFFSET_ENA;
 692     }
 693     if (state->translate[2] != 0.0f) {
 694         r300->viewport_state->zoffset = state->translate[2];
 695         r300->viewport_state->vte_control |= R300_VPORT_Z_OFFSET_ENA;
 696     }
 697
 698     r300->dirty_state |= R300_NEW_VIEWPORT;
 699 }
 700
 701 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 702                                     unsigned count,
 703                                     const struct pipe_vertex_buffer* buffers)
 704 {
 705     struct r300_context* r300 = r300_context(pipe);
 706
 707     memcpy(r300->vertex_buffer, buffers,
 708         sizeof(struct pipe_vertex_buffer) * count);
 709     r300->vertex_buffer_count = count;
 710
 711     if (r300->draw) {
 712         draw_flush(r300->draw);
 713         draw_set_vertex_buffers(r300->draw, count, buffers);
 714     }
 715
 716     r300->dirty_state |= R300_NEW_VERTEX_FORMAT;
 717 }
 718
 719 static void r300_set_vertex_elements(struct pipe_context* pipe,
 720                                     unsigned count,
 721                                     const struct pipe_vertex_element* elements)
 722 {
 723     struct r300_context* r300 = r300_context(pipe);
 724
 725     memcpy(r300->vertex_element,
 726            elements,
 727            sizeof(struct pipe_vertex_element) * count);
 728     r300->vertex_element_count = count;
 729
 730     if (r300->draw) {
 731         draw_flush(r300->draw);
 732         draw_set_vertex_elements(r300->draw, count, elements);
 733     }
 734 }
 735
 736 static void* r300_create_vs_state(struct pipe_context* pipe,
 737                                   const struct pipe_shader_state* shader)
 738 {
 739     struct r300_context* r300 = r300_context(pipe);
 740
 741     if (r300_screen(pipe->screen)->caps->has_tcl) {
 742         struct r300_vertex_shader* vs = CALLOC_STRUCT(r300_vertex_shader);
 743         /* Copy state directly into shader. */
 744         vs->state = *shader;
 745         vs->state.tokens = tgsi_dup_tokens(shader->tokens);
 746
 747         tgsi_scan_shader(shader->tokens, &vs->info);
 748
 749         return (void*)vs;
 750     } else {
 751         return draw_create_vertex_shader(r300->draw, shader);
 752     }
 753 }
 754
 755 static void r300_bind_vs_state(struct pipe_context* pipe, void* shader)
 756 {
 757     struct r300_context* r300 = r300_context(pipe);
 758
 759     if (r300_screen(pipe->screen)->caps->has_tcl) {
 760         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 761
 762         if (vs == NULL) {
 763             r300->vs = NULL;
 764             return;
 765         } else if (!vs->translated) {
 766             r300_translate_vertex_shader(r300, vs);
 767         }
 768
 769         r300->vs = vs;
 770         r300->dirty_state |= R300_NEW_VERTEX_SHADER | R300_NEW_VERTEX_SHADER_CONSTANTS;
 771     } else {
 772         draw_flush(r300->draw);
 773         draw_bind_vertex_shader(r300->draw,
 774                 (struct draw_vertex_shader*)shader);
 775     }
 776 }
 777
 778 static void r300_delete_vs_state(struct pipe_context* pipe, void* shader)
 779 {
 780     struct r300_context* r300 = r300_context(pipe);
 781
 782     if (r300_screen(pipe->screen)->caps->has_tcl) {
 783         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 784
 785         rc_constants_destroy(&vs->code.constants);
 786         FREE((void*)vs->state.tokens);
 787         FREE(shader);
 788     } else {
 789         draw_delete_vertex_shader(r300->draw,
 790                 (struct draw_vertex_shader*)shader);
 791     }
 792 }
 793
 794 static void r300_set_constant_buffer(struct pipe_context *pipe,
 795                                      uint shader, uint index,
 796                                      const struct pipe_constant_buffer *buf)
 797 {
 798     struct r300_context* r300 = r300_context(pipe);
 799     void *mapped;
 800
 801     if (buf == NULL || buf->buffer->size == 0 ||
 802         (mapped = pipe_buffer_map(pipe->screen, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)) == NULL)
 803     {
 804         r300->shader_constants[shader].count = 0;
 805         return;
 806     }
 807
 808     assert((buf->buffer->size % 4 * sizeof(float)) == 0);
 809     memcpy(r300->shader_constants[shader].constants, mapped, buf->buffer->size);
 810     r300->shader_constants[shader].count = buf->buffer->size / (4 * sizeof(float));
 811     pipe_buffer_unmap(pipe->screen, buf->buffer);
 812
 813     if (shader == PIPE_SHADER_VERTEX)
 814         r300->dirty_state |= R300_NEW_VERTEX_SHADER_CONSTANTS;
 815     else if (shader == PIPE_SHADER_FRAGMENT)
 816         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 817 }
 818
 819 void r300_init_state_functions(struct r300_context* r300)
 820 {
 821     r300->context.create_blend_state = r300_create_blend_state;
 822     r300->context.bind_blend_state = r300_bind_blend_state;
 823     r300->context.delete_blend_state = r300_delete_blend_state;
 824
 825     r300->context.set_blend_color = r300_set_blend_color;
 826
 827     r300->context.set_clip_state = r300_set_clip_state;
 828
 829     r300->context.set_constant_buffer = r300_set_constant_buffer;
 830
 831     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 832     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 833     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 834
 835     r300->context.set_edgeflags = r300_set_edgeflags;
 836
 837     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 838
 839     r300->context.create_fs_state = r300_create_fs_state;
 840     r300->context.bind_fs_state = r300_bind_fs_state;
 841     r300->context.delete_fs_state = r300_delete_fs_state;
 842
 843     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 844
 845     r300->context.create_rasterizer_state = r300_create_rs_state;
 846     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 847     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 848
 849     r300->context.create_sampler_state = r300_create_sampler_state;
 850     r300->context.bind_fragment_sampler_states = r300_bind_sampler_states;
 851     r300->context.bind_vertex_sampler_states = r300_lacks_vertex_textures;
 852     r300->context.delete_sampler_state = r300_delete_sampler_state;
 853
 854     r300->context.set_fragment_sampler_textures = r300_set_sampler_textures;
 855
 856     r300->context.set_scissor_state = r300_set_scissor_state;
 857
 858     r300->context.set_viewport_state = r300_set_viewport_state;
 859
 860     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 861     r300->context.set_vertex_elements = r300_set_vertex_elements;
 862
 863     r300->context.create_vs_state = r300_create_vs_state;
 864     r300->context.bind_vs_state = r300_bind_vs_state;
 865     r300->context.delete_vs_state = r300_delete_vs_state;
 866 }