src/gallium/drivers/r300/r300_vs.c

   1 /*
   2  * Copyright 2009 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 "r300_vs.h"
  25 #include "r300_fs.h"
  26
  27 #include "r300_context.h"
  28 #include "r300_screen.h"
  29 #include "r300_tgsi_to_rc.h"
  30 #include "r300_reg.h"
  31
  32 #include "tgsi/tgsi_dump.h"
  33 #include "tgsi/tgsi_parse.h"
  34
  35 #include "radeon_compiler.h"
  36
  37 #include "util/u_math.h"
  38
  39 /* Convert info about VS output semantics into r300_shader_semantics. */
  40 static void r300_shader_read_vs_outputs(
  41     struct tgsi_shader_info* info,
  42     struct r300_shader_semantics* vs_outputs)
  43 {
  44     int i;
  45     unsigned index;
  46
  47     r300_shader_semantics_reset(vs_outputs);
  48
  49     for (i = 0; i < info->num_outputs; i++) {
  50         index = info->output_semantic_index[i];
  51
  52         switch (info->output_semantic_name[i]) {
  53             case TGSI_SEMANTIC_POSITION:
  54                 assert(index == 0);
  55                 vs_outputs->pos = i;
  56                 break;
  57
  58             case TGSI_SEMANTIC_PSIZE:
  59                 assert(index == 0);
  60                 vs_outputs->psize = i;
  61                 break;
  62
  63             case TGSI_SEMANTIC_COLOR:
  64                 assert(index <= ATTR_COLOR_COUNT);
  65                 vs_outputs->color[index] = i;
  66                 break;
  67
  68             case TGSI_SEMANTIC_BCOLOR:
  69                 assert(index <= ATTR_COLOR_COUNT);
  70                 vs_outputs->bcolor[index] = i;
  71                 break;
  72
  73             case TGSI_SEMANTIC_GENERIC:
  74                 assert(index <= ATTR_GENERIC_COUNT);
  75                 vs_outputs->generic[index] = i;
  76                 break;
  77
  78             case TGSI_SEMANTIC_FOG:
  79                 assert(index == 0);
  80                 vs_outputs->fog = i;
  81                 break;
  82
  83             case TGSI_SEMANTIC_EDGEFLAG:
  84                 assert(index == 0);
  85                 fprintf(stderr, "r300 VP: cannot handle edgeflag output\n");
  86                 assert(0);
  87                 break;
  88             default:
  89                 assert(0);
  90         }
  91     }
  92 }
  93
  94 static void r300_shader_vap_output_fmt(struct r300_vertex_shader* vs)
  95 {
  96     struct r300_shader_semantics* vs_outputs = &vs->outputs;
  97     uint32_t* hwfmt = vs->hwfmt;
  98     int i, gen_count;
  99
 100     /* Do the actual vertex_info setup.
 101      *
 102      * vertex_info has four uints of hardware-specific data in it.
 103      * vinfo.hwfmt[0] is R300_VAP_VTX_STATE_CNTL
 104      * vinfo.hwfmt[1] is R300_VAP_VSM_VTX_ASSM
 105      * vinfo.hwfmt[2] is R300_VAP_OUTPUT_VTX_FMT_0
 106      * vinfo.hwfmt[3] is R300_VAP_OUTPUT_VTX_FMT_1 */
 107
 108     hwfmt[0] = 0x5555; /* XXX this is classic Mesa bonghits */
 109
 110     /* Position. */
 111     if (vs_outputs->pos != ATTR_UNUSED) {
 112         hwfmt[1] |= R300_INPUT_CNTL_POS;
 113         hwfmt[2] |= R300_VAP_OUTPUT_VTX_FMT_0__POS_PRESENT;
 114     } else {
 115         assert(0);
 116     }
 117
 118     /* Point size. */
 119     if (vs_outputs->psize != ATTR_UNUSED) {
 120         hwfmt[2] |= R300_VAP_OUTPUT_VTX_FMT_0__PT_SIZE_PRESENT;
 121     }
 122
 123     /* Colors. */
 124     for (i = 0; i < ATTR_COLOR_COUNT; i++) {
 125         if (vs_outputs->color[i] != ATTR_UNUSED) {
 126             hwfmt[1] |= R300_INPUT_CNTL_COLOR;
 127             hwfmt[2] |= R300_VAP_OUTPUT_VTX_FMT_0__COLOR_0_PRESENT << i;
 128         }
 129     }
 130
 131     /* XXX Back-face colors. */
 132
 133     /* Texture coordinates. */
 134     gen_count = 0;
 135     for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
 136         if (vs_outputs->generic[i] != ATTR_UNUSED) {
 137             hwfmt[1] |= (R300_INPUT_CNTL_TC0 << gen_count);
 138             hwfmt[3] |= (4 << (3 * gen_count));
 139             gen_count++;
 140         }
 141     }
 142
 143     /* Fog coordinates. */
 144     if (vs_outputs->fog != ATTR_UNUSED) {
 145         hwfmt[1] |= (R300_INPUT_CNTL_TC0 << gen_count);
 146         hwfmt[3] |= (4 << (3 * gen_count));
 147         gen_count++;
 148     }
 149
 150     /* XXX magic */
 151     assert(gen_count <= 8);
 152
 153     /* WPOS. */
 154     vs->wpos_tex_output = gen_count;
 155 }
 156
 157 /* Sets up stream mapping to equivalent VS outputs if TCL is bypassed
 158  * or isn't present. */
 159 static void r300_stream_locations_notcl(
 160     struct r300_shader_semantics* vs_outputs,
 161     int* stream_loc)
 162 {
 163     int i, tabi = 0, gen_count;
 164
 165     /* Position. */
 166     stream_loc[tabi++] = 0;
 167
 168     /* Point size. */
 169     if (vs_outputs->psize != ATTR_UNUSED) {
 170         stream_loc[tabi++] = 1;
 171     }
 172
 173     /* Colors. */
 174     for (i = 0; i < ATTR_COLOR_COUNT; i++) {
 175         if (vs_outputs->color[i] != ATTR_UNUSED) {
 176             stream_loc[tabi++] = 2 + i;
 177         }
 178     }
 179
 180     /* Back-face colors. */
 181     for (i = 0; i < ATTR_COLOR_COUNT; i++) {
 182         if (vs_outputs->bcolor[i] != ATTR_UNUSED) {
 183             stream_loc[tabi++] = 4 + i;
 184         }
 185     }
 186
 187     /* Texture coordinates. */
 188     gen_count = 0;
 189     for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
 190         if (vs_outputs->generic[i] != ATTR_UNUSED) {
 191             assert(tabi < 16);
 192             stream_loc[tabi++] = 6 + gen_count;
 193             gen_count++;
 194         }
 195     }
 196
 197     /* Fog coordinates. */
 198     if (vs_outputs->fog != ATTR_UNUSED) {
 199         assert(tabi < 16);
 200         stream_loc[tabi++] = 6 + gen_count;
 201         gen_count++;
 202     }
 203
 204     /* WPOS. */
 205     if (vs_outputs->wpos != ATTR_UNUSED) {
 206         assert(tabi < 16);
 207         stream_loc[tabi++] = 6 + gen_count;
 208         gen_count++;
 209     }
 210
 211     for (; tabi < 16;) {
 212         stream_loc[tabi++] = -1;
 213     }
 214 }
 215
 216 static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)
 217 {
 218     struct r300_vertex_shader * vs = c->UserData;
 219     struct r300_shader_semantics* outputs = &vs->outputs;
 220     struct tgsi_shader_info* info = &vs->info;
 221     int i, reg = 0;
 222
 223     /* Fill in the input mapping */
 224     for (i = 0; i < info->num_inputs; i++)
 225         c->code->inputs[i] = i;
 226
 227     /* Position. */
 228     if (outputs->pos != ATTR_UNUSED) {
 229         c->code->outputs[outputs->pos] = reg++;
 230     } else {
 231         assert(0);
 232     }
 233
 234     /* Point size. */
 235     if (outputs->psize != ATTR_UNUSED) {
 236         c->code->outputs[outputs->psize] = reg++;
 237     }
 238
 239     /* Colors. */
 240     for (i = 0; i < ATTR_COLOR_COUNT; i++) {
 241         if (outputs->color[i] != ATTR_UNUSED) {
 242             c->code->outputs[outputs->color[i]] = reg++;
 243         }
 244     }
 245
 246     /* XXX Back-face colors. */
 247
 248     /* Texture coordinates. */
 249     for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
 250         if (outputs->generic[i] != ATTR_UNUSED) {
 251             c->code->outputs[outputs->generic[i]] = reg++;
 252         }
 253     }
 254
 255     /* Fog coordinates. */
 256     if (outputs->fog != ATTR_UNUSED) {
 257         c->code->outputs[outputs->fog] = reg++;
 258     }
 259
 260     /* WPOS. */
 261     if (outputs->wpos != ATTR_UNUSED) {
 262         c->code->outputs[outputs->wpos] = reg++;
 263     }
 264 }
 265
 266 static void r300_insert_wpos(struct r300_vertex_program_compiler* c,
 267                              struct r300_shader_semantics* outputs)
 268 {
 269     int i, lastOutput = 0;
 270
 271     /* Find the max output index. */
 272     lastOutput = MAX2(lastOutput, outputs->psize);
 273     for (i = 0; i < ATTR_COLOR_COUNT; i++) {
 274         lastOutput = MAX2(lastOutput, outputs->color[i]);
 275         lastOutput = MAX2(lastOutput, outputs->bcolor[i]);
 276     }
 277     for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
 278         lastOutput = MAX2(lastOutput, outputs->generic[i]);
 279     }
 280     lastOutput = MAX2(lastOutput, outputs->fog);
 281
 282     /* Set WPOS after the last output. */
 283     lastOutput++;
 284     rc_copy_output(&c->Base, 0, lastOutput); /* out[lastOutput] = out[0]; */
 285     outputs->wpos = lastOutput;
 286 }
 287
 288 void r300_translate_vertex_shader(struct r300_context* r300,
 289                                   struct r300_vertex_shader* vs)
 290 {
 291     struct r300_vertex_program_compiler compiler;
 292     struct tgsi_to_rc ttr;
 293
 294     /* Initialize. */
 295     r300_shader_read_vs_outputs(&vs->info, &vs->outputs);
 296
 297     /* Setup the compiler */
 298     rc_init(&compiler.Base);
 299
 300     compiler.Base.Debug = DBG_ON(r300, DBG_VP);
 301     compiler.code = &vs->code;
 302     compiler.UserData = vs;
 303
 304     if (compiler.Base.Debug) {
 305         debug_printf("r300: Initial vertex program\n");
 306         tgsi_dump(vs->state.tokens, 0);
 307     }
 308
 309     /* Translate TGSI to our internal representation */
 310     ttr.compiler = &compiler.Base;
 311     ttr.info = &vs->info;
 312
 313     r300_tgsi_to_rc(&ttr, vs->state.tokens);
 314
 315     compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs+1));
 316     compiler.SetHwInputOutput = &set_vertex_inputs_outputs;
 317
 318     /* Insert the WPOS output. */
 319     r300_insert_wpos(&compiler, &vs->outputs);
 320
 321     r300_shader_vap_output_fmt(vs);
 322     r300_stream_locations_notcl(&vs->outputs, vs->stream_loc_notcl);
 323
 324     /* Invoke the compiler */
 325     r3xx_compile_vertex_program(&compiler);
 326     if (compiler.Base.Error) {
 327         /* XXX We should fallback using Draw. */
 328         fprintf(stderr, "r300 VP: Compiler error\n");
 329         abort();
 330     }
 331
 332     /* And, finally... */
 333     rc_destroy(&compiler.Base);
 334     vs->translated = TRUE;
 335 }
 336
 337 boolean r300_vertex_shader_setup_wpos(struct r300_context* r300)
 338 {
 339     struct r300_vertex_shader* vs = r300->vs;
 340     int tex_output = r300->vs->wpos_tex_output;
 341     uint32_t tex_fmt = R300_INPUT_CNTL_TC0 << tex_output;
 342     uint32_t* hwfmt = vs->hwfmt;
 343
 344     if (r300->fs->inputs.wpos != ATTR_UNUSED) {
 345         /* Enable WPOS in VAP. */
 346         if (!(hwfmt[1] & tex_fmt)) {
 347             hwfmt[1] |= tex_fmt;
 348             hwfmt[3] |= (4 << (3 * tex_output));
 349
 350             assert(tex_output < 8);
 351             return TRUE;
 352         }
 353     } else {
 354         /* Disable WPOS in VAP. */
 355         if (hwfmt[1] & tex_fmt) {
 356             hwfmt[1] &= ~tex_fmt;
 357             hwfmt[3] &= ~(4 << (3 * tex_output));
 358             return TRUE;
 359         }
 360     }
 361     return FALSE;
 362 }