src/gallium/drivers/r300/r300_vs.c

   1 /*
   2  * Copyright 2009 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 "r300_vs.h"
  24
  25 #include "r300_context.h"
  26 #include "r300_tgsi_to_rc.h"
  27
  28 #include "tgsi/tgsi_dump.h"
  29 #include "tgsi/tgsi_parse.h"
  30
  31 #include "radeon_compiler.h"
  32
  33
  34 static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)
  35 {
  36     struct r300_vertex_shader * vs = c->UserData;
  37     struct tgsi_shader_info* info = &vs->info;
  38     struct tgsi_parse_context parser;
  39     struct tgsi_full_declaration * decl;
  40     boolean pointsize = false;
  41     int out_colors = 0;
  42     int colors = 0;
  43     int out_generic = 0;
  44     int generic = 0;
  45     int i;
  46
  47     /* Fill in the input mapping */
  48     for (i = 0; i < info->num_inputs; i++)
  49         c->code->inputs[i] = i;
  50
  51     /* Fill in the output mapping */
  52     for (i = 0; i < info->num_outputs; i++) {
  53         switch (info->output_semantic_name[i]) {
  54             case TGSI_SEMANTIC_PSIZE:
  55                 pointsize = true;
  56                 break;
  57             case TGSI_SEMANTIC_COLOR:
  58                 out_colors++;
  59                 break;
  60             case TGSI_SEMANTIC_FOG:
  61             case TGSI_SEMANTIC_GENERIC:
  62                 out_generic++;
  63                 break;
  64         }
  65     }
  66
  67     tgsi_parse_init(&parser, vs->state.tokens);
  68
  69     while (!tgsi_parse_end_of_tokens(&parser)) {
  70         tgsi_parse_token(&parser);
  71
  72         if (parser.FullToken.Token.Type != TGSI_TOKEN_TYPE_DECLARATION)
  73             continue;
  74
  75         decl = &parser.FullToken.FullDeclaration;
  76
  77         if (decl->Declaration.File != TGSI_FILE_OUTPUT)
  78             continue;
  79
  80         switch (decl->Semantic.SemanticName) {
  81             case TGSI_SEMANTIC_POSITION:
  82                 c->code->outputs[decl->DeclarationRange.First] = 0;
  83                 break;
  84             case TGSI_SEMANTIC_PSIZE:
  85                 c->code->outputs[decl->DeclarationRange.First] = 1;
  86                 break;
  87             case TGSI_SEMANTIC_COLOR:
  88                 c->code->outputs[decl->DeclarationRange.First] = 1 +
  89                     (pointsize ? 1 : 0) +
  90                     colors++;
  91                 break;
  92             case TGSI_SEMANTIC_FOG:
  93             case TGSI_SEMANTIC_GENERIC:
  94                 c->code->outputs[decl->DeclarationRange.First] = 1 +
  95                     (pointsize ? 1 : 0) +
  96                     out_colors +
  97                     generic++;
  98                 break;
  99             default:
 100                 debug_printf("r300: vs: Bad semantic declaration %d\n",
 101                     decl->Semantic.SemanticName);
 102                 break;
 103         }
 104     }
 105
 106     tgsi_parse_free(&parser);
 107 }
 108
 109
 110 void r300_translate_vertex_shader(struct r300_context* r300,
 111                                   struct r300_vertex_shader* vs)
 112 {
 113     struct r300_vertex_program_compiler compiler;
 114     struct tgsi_to_rc ttr;
 115
 116     /* Setup the compiler */
 117     rc_init(&compiler.Base);
 118
 119     compiler.Base.Debug = DBG_ON(r300, DBG_VP);
 120     compiler.code = &vs->code;
 121     compiler.UserData = vs;
 122
 123     if (compiler.Base.Debug) {
 124         debug_printf("r300: Initial vertex program\n");
 125         tgsi_dump(vs->state.tokens, 0);
 126     }
 127
 128     /* Translate TGSI to our internal representation */
 129     ttr.compiler = &compiler.Base;
 130     ttr.info = &vs->info;
 131
 132     r300_tgsi_to_rc(&ttr, vs->state.tokens);
 133
 134     compiler.RequiredOutputs = ~(~0 << vs->info.num_outputs);
 135     compiler.SetHwInputOutput = &set_vertex_inputs_outputs;
 136
 137     /* Invoke the compiler */
 138     r3xx_compile_vertex_program(&compiler);
 139     if (compiler.Base.Error) {
 140         /* Todo: Fail gracefully */
 141         fprintf(stderr, "r300 VP: Compiler error\n");
 142         abort();
 143     }
 144
 145     /* And, finally... */
 146     rc_destroy(&compiler.Base);
 147     vs->translated = TRUE;
 148 }