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 r300_set_scissor_regs(const struct pipe_scissor_state* state,
 293                                   struct r300_scissor_regs *scissor,
 294                                   boolean is_r500)
 295 {
 296     if (is_r500) {
 297         scissor->top_left =
 298             (state->minx << R300_SCISSORS_X_SHIFT) |
 299             (state->miny << R300_SCISSORS_Y_SHIFT);
 300         scissor->bottom_right =
 301             ((state->maxx - 1) << R300_SCISSORS_X_SHIFT) |
 302             ((state->maxy - 1) << R300_SCISSORS_Y_SHIFT);
 303     } else {
 304         /* Offset of 1440 in non-R500 chipsets. */
 305         scissor->top_left =
 306             ((state->minx + 1440) << R300_SCISSORS_X_SHIFT) |
 307             ((state->miny + 1440) << R300_SCISSORS_Y_SHIFT);
 308         scissor->bottom_right =
 309             (((state->maxx - 1) + 1440) << R300_SCISSORS_X_SHIFT) |
 310             (((state->maxy - 1) + 1440) << R300_SCISSORS_Y_SHIFT);
 311     }
 312
 313     scissor->empty_area = state->minx >= state->maxx ||
 314                           state->miny >= state->maxy;
 315 }
 316
 317 static void
 318     r300_set_framebuffer_state(struct pipe_context* pipe,
 319                                const struct pipe_framebuffer_state* state)
 320 {
 321     struct r300_context* r300 = r300_context(pipe);
 322     struct pipe_scissor_state scissor;
 323
 324     if (r300->draw) {
 325         draw_flush(r300->draw);
 326     }
 327
 328     r300->framebuffer_state = *state;
 329
 330     scissor.minx = scissor.miny = 0;
 331     scissor.maxx = state->width;
 332     scissor.maxy = state->height;
 333     r300_set_scissor_regs(&scissor, &r300->scissor_state->framebuffer,
 334                           r300_screen(r300->context.screen)->caps->is_r500);
 335
 336     /* Don't rely on the order of states being set for the first time. */
 337     if (!r300->rs_state || !r300->rs_state->rs.scissor) {
 338         r300->dirty_state |= R300_NEW_SCISSOR;
 339     }
 340     r300->dirty_state |= R300_NEW_FRAMEBUFFERS;
 341 }
 342
 343 /* Create fragment shader state. */
 344 static void* r300_create_fs_state(struct pipe_context* pipe,
 345                                   const struct pipe_shader_state* shader)
 346 {
 347     struct r300_fragment_shader* fs = NULL;
 348
 349     fs = (struct r300_fragment_shader*)CALLOC_STRUCT(r300_fragment_shader);
 350
 351     /* Copy state directly into shader. */
 352     fs->state = *shader;
 353     fs->state.tokens = tgsi_dup_tokens(shader->tokens);
 354
 355     tgsi_scan_shader(shader->tokens, &fs->info);
 356
 357     return (void*)fs;
 358 }
 359
 360 /* Bind fragment shader state. */
 361 static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 362 {
 363     struct r300_context* r300 = r300_context(pipe);
 364     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 365
 366     if (fs == NULL) {
 367         r300->fs = NULL;
 368         return;
 369     } else if (!fs->translated) {
 370         r300_translate_fragment_shader(r300, fs);
 371     }
 372
 373     r300->fs = fs;
 374
 375     r300->dirty_state |= R300_NEW_FRAGMENT_SHADER | R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 376 }
 377
 378 /* Delete fragment shader state. */
 379 static void r300_delete_fs_state(struct pipe_context* pipe, void* shader)
 380 {
 381     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
 382     rc_constants_destroy(&fs->code.constants);
 383     FREE((void*)fs->state.tokens);
 384     FREE(shader);
 385 }
 386
 387 static void r300_set_polygon_stipple(struct pipe_context* pipe,
 388                                      const struct pipe_poly_stipple* state)
 389 {
 390     /* XXX no idea how to set this up, but not terribly important */
 391 }
 392
 393 /* Create a new rasterizer state based on the CSO rasterizer state.
 394  *
 395  * This is a very large chunk of state, and covers most of the graphics
 396  * backend (GB), geometry assembly (GA), and setup unit (SU) blocks.
 397  *
 398  * In a not entirely unironic sidenote, this state has nearly nothing to do
 399  * with the actual block on the Radeon called the rasterizer (RS). */
 400 static void* r300_create_rs_state(struct pipe_context* pipe,
 401                                   const struct pipe_rasterizer_state* state)
 402 {
 403     struct r300_rs_state* rs = CALLOC_STRUCT(r300_rs_state);
 404
 405     /* Copy rasterizer state for Draw. */
 406     rs->rs = *state;
 407
 408     rs->enable_vte = !state->bypass_vs_clip_and_viewport;
 409
 410 #ifdef PIPE_ARCH_LITTLE_ENDIAN
 411     rs->vap_control_status = R300_VC_NO_SWAP;
 412 #else
 413     rs->vap_control_status = R300_VC_32BIT_SWAP;
 414 #endif
 415
 416     /* If bypassing TCL, or if no TCL engine is present, turn off the HW TCL.
 417      * Else, enable HW TCL and force Draw's TCL off. */
 418     if (state->bypass_vs_clip_and_viewport ||
 419             !r300_screen(pipe->screen)->caps->has_tcl) {
 420         rs->vap_control_status |= R300_VAP_TCL_BYPASS;
 421     } else {
 422         rs->rs.bypass_vs_clip_and_viewport = TRUE;
 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
 553     sampler->filter0 |=
 554         (r300_translate_wrap(state->wrap_s) << R300_TX_WRAP_S_SHIFT) |
 555         (r300_translate_wrap(state->wrap_t) << R300_TX_WRAP_T_SHIFT) |
 556         (r300_translate_wrap(state->wrap_r) << R300_TX_WRAP_R_SHIFT);
 557
 558     sampler->filter0 |= r300_translate_tex_filters(state->min_img_filter,
 559                                                    state->mag_img_filter,
 560                                                    state->min_mip_filter);
 561
 562     /* Unfortunately, r300-r500 don't support floating-point mipmap lods. */
 563     /* We must pass these to the emit function to clamp them properly. */
 564     sampler->min_lod = MAX2((unsigned)state->min_lod, 0);
 565     sampler->max_lod = MAX2((unsigned)ceilf(state->max_lod), 0);
 566
 567     lod_bias = CLAMP((int)(state->lod_bias * 32), -(1 << 9), (1 << 9) - 1);
 568
 569     sampler->filter1 |= lod_bias << R300_LOD_BIAS_SHIFT;
 570
 571     sampler->filter1 |= r300_anisotropy(state->max_anisotropy);
 572
 573     util_pack_color(state->border_color, PIPE_FORMAT_A8R8G8B8_UNORM,
 574                     &sampler->border_color);
 575
 576     /* R500-specific fixups and optimizations */
 577     if (r300_screen(r300->context.screen)->caps->is_r500) {
 578         sampler->filter1 |= R500_BORDER_FIX;
 579     }
 580
 581     return (void*)sampler;
 582 }
 583
 584 static void r300_bind_sampler_states(struct pipe_context* pipe,
 585                                      unsigned count,
 586                                      void** states)
 587 {
 588     struct r300_context* r300 = r300_context(pipe);
 589     int i;
 590
 591     if (count > 8) {
 592         return;
 593     }
 594
 595     for (i = 0; i < count; i++) {
 596         if (r300->sampler_states[i] != states[i]) {
 597             r300->sampler_states[i] = (struct r300_sampler_state*)states[i];
 598             r300->dirty_state |= (R300_NEW_SAMPLER << i);
 599         }
 600     }
 601
 602     r300->sampler_count = count;
 603 }
 604
 605 static void r300_lacks_vertex_textures(struct pipe_context* pipe,
 606                                        unsigned count,
 607                                        void** states)
 608 {
 609 }
 610
 611 static void r300_delete_sampler_state(struct pipe_context* pipe, void* state)
 612 {
 613     FREE(state);
 614 }
 615
 616 static void r300_set_sampler_textures(struct pipe_context* pipe,
 617                                       unsigned count,
 618                                       struct pipe_texture** texture)
 619 {
 620     struct r300_context* r300 = r300_context(pipe);
 621     boolean is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
 622     int i;
 623
 624     /* XXX magic num */
 625     if (count > 8) {
 626         return;
 627     }
 628
 629     r300->context.flush(&r300->context, 0, NULL);
 630
 631     for (i = 0; i < count; i++) {
 632         if (r300->textures[i] != (struct r300_texture*)texture[i]) {
 633             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 634                 texture[i]);
 635             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 636
 637             /* R300-specific - set the texrect factor in a fragment shader */
 638             if (!is_r500 && r300->textures[i]->is_npot) {
 639                 /* XXX It would be nice to re-emit just 1 constant,
 640                  * XXX not all of them */
 641                 r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 642             }
 643         }
 644     }
 645
 646     for (i = count; i < 8; i++) {
 647         if (r300->textures[i]) {
 648             pipe_texture_reference((struct pipe_texture**)&r300->textures[i],
 649                 NULL);
 650             r300->dirty_state |= (R300_NEW_TEXTURE << i);
 651         }
 652     }
 653
 654     r300->texture_count = count;
 655 }
 656
 657 static void r300_set_scissor_state(struct pipe_context* pipe,
 658                                    const struct pipe_scissor_state* state)
 659 {
 660     struct r300_context* r300 = r300_context(pipe);
 661
 662     r300_set_scissor_regs(state, &r300->scissor_state->scissor,
 663                           r300_screen(r300->context.screen)->caps->is_r500);
 664
 665     /* Don't rely on the order of states being set for the first time. */
 666     if (!r300->rs_state || r300->rs_state->rs.scissor) {
 667         r300->dirty_state |= R300_NEW_SCISSOR;
 668     }
 669 }
 670
 671 static void r300_set_viewport_state(struct pipe_context* pipe,
 672                                     const struct pipe_viewport_state* state)
 673 {
 674     struct r300_context* r300 = r300_context(pipe);
 675
 676     /* Do the transform in HW. */
 677     r300->viewport_state->vte_control = R300_VTX_W0_FMT;
 678
 679     if (state->scale[0] != 1.0f) {
 680         r300->viewport_state->xscale = state->scale[0];
 681         r300->viewport_state->vte_control |= R300_VPORT_X_SCALE_ENA;
 682     }
 683     if (state->scale[1] != 1.0f) {
 684         r300->viewport_state->yscale = state->scale[1];
 685         r300->viewport_state->vte_control |= R300_VPORT_Y_SCALE_ENA;
 686     }
 687     if (state->scale[2] != 1.0f) {
 688         r300->viewport_state->zscale = state->scale[2];
 689         r300->viewport_state->vte_control |= R300_VPORT_Z_SCALE_ENA;
 690     }
 691     if (state->translate[0] != 0.0f) {
 692         r300->viewport_state->xoffset = state->translate[0];
 693         r300->viewport_state->vte_control |= R300_VPORT_X_OFFSET_ENA;
 694     }
 695     if (state->translate[1] != 0.0f) {
 696         r300->viewport_state->yoffset = state->translate[1];
 697         r300->viewport_state->vte_control |= R300_VPORT_Y_OFFSET_ENA;
 698     }
 699     if (state->translate[2] != 0.0f) {
 700         r300->viewport_state->zoffset = state->translate[2];
 701         r300->viewport_state->vte_control |= R300_VPORT_Z_OFFSET_ENA;
 702     }
 703
 704     r300->dirty_state |= R300_NEW_VIEWPORT;
 705 }
 706
 707 static void r300_set_vertex_buffers(struct pipe_context* pipe,
 708                                     unsigned count,
 709                                     const struct pipe_vertex_buffer* buffers)
 710 {
 711     struct r300_context* r300 = r300_context(pipe);
 712
 713     memcpy(r300->vertex_buffer, buffers,
 714         sizeof(struct pipe_vertex_buffer) * count);
 715     r300->vertex_buffer_count = count;
 716
 717     if (r300->draw) {
 718         draw_flush(r300->draw);
 719         draw_set_vertex_buffers(r300->draw, count, buffers);
 720     }
 721
 722     r300->dirty_state |= R300_NEW_VERTEX_FORMAT;
 723 }
 724
 725 static void r300_set_vertex_elements(struct pipe_context* pipe,
 726                                     unsigned count,
 727                                     const struct pipe_vertex_element* elements)
 728 {
 729     struct r300_context* r300 = r300_context(pipe);
 730
 731     memcpy(r300->vertex_element,
 732            elements,
 733            sizeof(struct pipe_vertex_element) * count);
 734     r300->vertex_element_count = count;
 735
 736     if (r300->draw) {
 737         draw_flush(r300->draw);
 738         draw_set_vertex_elements(r300->draw, count, elements);
 739     }
 740 }
 741
 742 static void* r300_create_vs_state(struct pipe_context* pipe,
 743                                   const struct pipe_shader_state* shader)
 744 {
 745     struct r300_context* r300 = r300_context(pipe);
 746
 747     if (r300_screen(pipe->screen)->caps->has_tcl) {
 748         struct r300_vertex_shader* vs = CALLOC_STRUCT(r300_vertex_shader);
 749         /* Copy state directly into shader. */
 750         vs->state = *shader;
 751         vs->state.tokens = tgsi_dup_tokens(shader->tokens);
 752
 753         tgsi_scan_shader(shader->tokens, &vs->info);
 754
 755         return (void*)vs;
 756     } else {
 757         return draw_create_vertex_shader(r300->draw, shader);
 758     }
 759 }
 760
 761 static void r300_bind_vs_state(struct pipe_context* pipe, void* shader)
 762 {
 763     struct r300_context* r300 = r300_context(pipe);
 764
 765     if (r300_screen(pipe->screen)->caps->has_tcl) {
 766         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 767
 768         if (vs == NULL) {
 769             r300->vs = NULL;
 770             return;
 771         } else if (!vs->translated) {
 772             r300_translate_vertex_shader(r300, vs);
 773         }
 774
 775         r300->vs = vs;
 776         r300->dirty_state |= R300_NEW_VERTEX_SHADER | R300_NEW_VERTEX_SHADER_CONSTANTS;
 777     } else {
 778         draw_flush(r300->draw);
 779         draw_bind_vertex_shader(r300->draw,
 780                 (struct draw_vertex_shader*)shader);
 781     }
 782 }
 783
 784 static void r300_delete_vs_state(struct pipe_context* pipe, void* shader)
 785 {
 786     struct r300_context* r300 = r300_context(pipe);
 787
 788     if (r300_screen(pipe->screen)->caps->has_tcl) {
 789         struct r300_vertex_shader* vs = (struct r300_vertex_shader*)shader;
 790
 791         rc_constants_destroy(&vs->code.constants);
 792         FREE((void*)vs->state.tokens);
 793         FREE(shader);
 794     } else {
 795         draw_delete_vertex_shader(r300->draw,
 796                 (struct draw_vertex_shader*)shader);
 797     }
 798 }
 799
 800 static void r300_set_constant_buffer(struct pipe_context *pipe,
 801                                      uint shader, uint index,
 802                                      const struct pipe_constant_buffer *buf)
 803 {
 804     struct r300_context* r300 = r300_context(pipe);
 805     void *mapped;
 806
 807     if (buf == NULL || buf->buffer->size == 0 ||
 808         (mapped = pipe_buffer_map(pipe->screen, buf->buffer, PIPE_BUFFER_USAGE_CPU_READ)) == NULL)
 809     {
 810         r300->shader_constants[shader].count = 0;
 811         return;
 812     }
 813
 814     assert((buf->buffer->size % 4 * sizeof(float)) == 0);
 815     memcpy(r300->shader_constants[shader].constants, mapped, buf->buffer->size);
 816     r300->shader_constants[shader].count = buf->buffer->size / (4 * sizeof(float));
 817     pipe_buffer_unmap(pipe->screen, buf->buffer);
 818
 819     if (shader == PIPE_SHADER_VERTEX)
 820         r300->dirty_state |= R300_NEW_VERTEX_SHADER_CONSTANTS;
 821     else if (shader == PIPE_SHADER_FRAGMENT)
 822         r300->dirty_state |= R300_NEW_FRAGMENT_SHADER_CONSTANTS;
 823 }
 824
 825 void r300_init_state_functions(struct r300_context* r300)
 826 {
 827     r300->context.create_blend_state = r300_create_blend_state;
 828     r300->context.bind_blend_state = r300_bind_blend_state;
 829     r300->context.delete_blend_state = r300_delete_blend_state;
 830
 831     r300->context.set_blend_color = r300_set_blend_color;
 832
 833     r300->context.set_clip_state = r300_set_clip_state;
 834
 835     r300->context.set_constant_buffer = r300_set_constant_buffer;
 836
 837     r300->context.create_depth_stencil_alpha_state = r300_create_dsa_state;
 838     r300->context.bind_depth_stencil_alpha_state = r300_bind_dsa_state;
 839     r300->context.delete_depth_stencil_alpha_state = r300_delete_dsa_state;
 840
 841     r300->context.set_edgeflags = r300_set_edgeflags;
 842
 843     r300->context.set_framebuffer_state = r300_set_framebuffer_state;
 844
 845     r300->context.create_fs_state = r300_create_fs_state;
 846     r300->context.bind_fs_state = r300_bind_fs_state;
 847     r300->context.delete_fs_state = r300_delete_fs_state;
 848
 849     r300->context.set_polygon_stipple = r300_set_polygon_stipple;
 850
 851     r300->context.create_rasterizer_state = r300_create_rs_state;
 852     r300->context.bind_rasterizer_state = r300_bind_rs_state;
 853     r300->context.delete_rasterizer_state = r300_delete_rs_state;
 854
 855     r300->context.create_sampler_state = r300_create_sampler_state;
 856     r300->context.bind_fragment_sampler_states = r300_bind_sampler_states;
 857     r300->context.bind_vertex_sampler_states = r300_lacks_vertex_textures;
 858     r300->context.delete_sampler_state = r300_delete_sampler_state;
 859
 860     r300->context.set_fragment_sampler_textures = r300_set_sampler_textures;
 861
 862     r300->context.set_scissor_state = r300_set_scissor_state;
 863
 864     r300->context.set_viewport_state = r300_set_viewport_state;
 865
 866     r300->context.set_vertex_buffers = r300_set_vertex_buffers;
 867     r300->context.set_vertex_elements = r300_set_vertex_elements;
 868
 869     r300->context.create_vs_state = r300_create_vs_state;
 870     r300->context.bind_vs_state = r300_bind_vs_state;
 871     r300->context.delete_vs_state = r300_delete_vs_state;
 872 }