src/gallium/drivers/i965/brw_pipe_shader.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32 #include "util/u_inlines.h"
  33 #include "util/u_memory.h"
  34
  35 #include "tgsi/tgsi_parse.h"
  36 #include "tgsi/tgsi_scan.h"
  37
  38 #include "brw_context.h"
  39 #include "brw_util.h"
  40 #include "brw_wm.h"
  41
  42
  43 /**
  44  * Determine if the given shader uses complex features such as flow
  45  * conditionals, loops, subroutines.
  46  */
  47 static GLboolean has_flow_control(const struct tgsi_shader_info *info)
  48 {
  49     return (info->opcode_count[TGSI_OPCODE_ARL] > 0 ||
  50             info->opcode_count[TGSI_OPCODE_IF] > 0 ||
  51             info->opcode_count[TGSI_OPCODE_ENDIF] > 0 || /* redundant - IF */
  52             info->opcode_count[TGSI_OPCODE_CAL] > 0 ||
  53             info->opcode_count[TGSI_OPCODE_BRK] > 0 ||   /* redundant - BGNLOOP */
  54             info->opcode_count[TGSI_OPCODE_RET] > 0 ||   /* redundant - CAL */
  55             info->opcode_count[TGSI_OPCODE_BGNLOOP] > 0);
  56 }
  57
  58
  59 static void scan_immediates(const struct tgsi_token *tokens,
  60                             const struct tgsi_shader_info *info,
  61                             struct brw_immediate_data *imm)
  62 {
  63    struct tgsi_parse_context parse;
  64    boolean done = FALSE;
  65
  66    imm->nr = 0;
  67    imm->data = MALLOC(info->immediate_count * 4 * sizeof(float));
  68
  69    tgsi_parse_init( &parse, tokens );
  70    while (!tgsi_parse_end_of_tokens( &parse ) && !done) {
  71       tgsi_parse_token( &parse );
  72
  73       switch (parse.FullToken.Token.Type) {
  74       case TGSI_TOKEN_TYPE_DECLARATION:
  75          break;
  76
  77       case TGSI_TOKEN_TYPE_IMMEDIATE: {
  78          static const float id[4] = {0,0,0,1};
  79          const float *value = &parse.FullToken.FullImmediate.u[0].Float;
  80          unsigned size = parse.FullToken.FullImmediate.Immediate.NrTokens - 1;
  81          unsigned i;
  82
  83          for (i = 0; i < size; i++)
  84             imm->data[imm->nr][i] = value[i];
  85
  86          for (; i < 4; i++)
  87             imm->data[imm->nr][i] = id[i];
  88
  89          imm->nr++;
  90          break;
  91       }
  92
  93       case TGSI_TOKEN_TYPE_INSTRUCTION:
  94          done = 1;
  95          break;
  96       }
  97    }
  98 }
  99
 100
 101 static void brw_bind_fs_state( struct pipe_context *pipe, void *prog )
 102 {
 103    struct brw_fragment_shader *fs = (struct brw_fragment_shader *)prog;
 104    struct brw_context *brw = brw_context(pipe);
 105
 106    if (brw->curr.fragment_shader == fs)
 107       return;
 108
 109    if (brw->curr.fragment_shader == NULL ||
 110        fs == NULL ||
 111        memcmp(&brw->curr.fragment_shader->signature, &fs->signature,
 112               brw_fs_signature_size(&fs->signature)) != 0) {
 113       brw->state.dirty.mesa |= PIPE_NEW_FRAGMENT_SIGNATURE;
 114    }
 115
 116    brw->curr.fragment_shader = fs;
 117    brw->state.dirty.mesa |= PIPE_NEW_FRAGMENT_SHADER;
 118 }
 119
 120 static void brw_bind_vs_state( struct pipe_context *pipe, void *prog )
 121 {
 122    struct brw_context *brw = brw_context(pipe);
 123
 124    brw->curr.vertex_shader = (struct brw_vertex_shader *)prog;
 125    brw->state.dirty.mesa |= PIPE_NEW_VERTEX_SHADER;
 126 }
 127
 128
 129
 130 static void *brw_create_fs_state( struct pipe_context *pipe,
 131                                   const struct pipe_shader_state *shader )
 132 {
 133    struct brw_context *brw = brw_context(pipe);
 134    struct brw_fragment_shader *fs;
 135    int i;
 136
 137    fs = CALLOC_STRUCT(brw_fragment_shader);
 138    if (fs == NULL)
 139       return NULL;
 140
 141    /* Duplicate tokens, scan shader
 142     */
 143    fs->id = brw->program_id++;
 144    fs->has_flow_control = has_flow_control(&fs->info);
 145
 146    fs->tokens = tgsi_dup_tokens(shader->tokens);
 147    if (fs->tokens == NULL)
 148       goto fail;
 149
 150    tgsi_scan_shader(fs->tokens, &fs->info);
 151    scan_immediates(fs->tokens, &fs->info, &fs->immediates);
 152
 153    fs->signature.nr_inputs = fs->info.num_inputs;
 154    for (i = 0; i < fs->info.num_inputs; i++) {
 155       fs->signature.input[i].interp = fs->info.input_interpolate[i];
 156       fs->signature.input[i].semantic = fs->info.input_semantic_name[i];
 157       fs->signature.input[i].semantic_index = fs->info.input_semantic_index[i];
 158    }
 159
 160    for (i = 0; i < fs->info.num_inputs; i++)
 161       if (fs->info.input_semantic_name[i] == TGSI_SEMANTIC_POSITION)
 162          fs->uses_depth = 1;
 163
 164    if (fs->info.uses_kill)
 165       fs->iz_lookup |= IZ_PS_KILL_ALPHATEST_BIT;
 166
 167    if (fs->info.writes_z)
 168       fs->iz_lookup |= IZ_PS_COMPUTES_DEPTH_BIT;
 169
 170    return (void *)fs;
 171
 172 fail:
 173    FREE(fs);
 174    return NULL;
 175 }
 176
 177
 178 static void *brw_create_vs_state( struct pipe_context *pipe,
 179                                   const struct pipe_shader_state *shader )
 180 {
 181    struct brw_context *brw = brw_context(pipe);
 182    struct brw_vertex_shader *vs;
 183    unsigned i;
 184
 185    vs = CALLOC_STRUCT(brw_vertex_shader);
 186    if (vs == NULL)
 187       return NULL;
 188
 189    /* Duplicate tokens, scan shader
 190     */
 191    vs->tokens = tgsi_dup_tokens(shader->tokens);
 192    if (vs->tokens == NULL)
 193       goto fail;
 194
 195    tgsi_scan_shader(vs->tokens, &vs->info);
 196    scan_immediates(vs->tokens, &vs->info, &vs->immediates);
 197
 198    vs->id = brw->program_id++;
 199    vs->has_flow_control = has_flow_control(&vs->info);
 200
 201    vs->output_hpos = BRW_OUTPUT_NOT_PRESENT;
 202    vs->output_color0 = BRW_OUTPUT_NOT_PRESENT;
 203    vs->output_color1 = BRW_OUTPUT_NOT_PRESENT;
 204    vs->output_bfc0 = BRW_OUTPUT_NOT_PRESENT;
 205    vs->output_bfc1 = BRW_OUTPUT_NOT_PRESENT;
 206    vs->output_edgeflag = BRW_OUTPUT_NOT_PRESENT;
 207
 208    for (i = 0; i < vs->info.num_outputs; i++) {
 209       int index = vs->info.output_semantic_index[i];
 210       switch (vs->info.output_semantic_name[i]) {
 211       case TGSI_SEMANTIC_POSITION:
 212          vs->output_hpos = i;
 213          break;
 214       case TGSI_SEMANTIC_COLOR:
 215          if (index == 0)
 216             vs->output_color0 = i;
 217          else
 218             vs->output_color1 = i;
 219          break;
 220       case TGSI_SEMANTIC_BCOLOR:
 221          if (index == 0)
 222             vs->output_bfc0 = i;
 223          else
 224             vs->output_bfc1 = i;
 225          break;
 226       case TGSI_SEMANTIC_EDGEFLAG:
 227          vs->output_edgeflag = i;
 228          break;
 229       }
 230    }
 231
 232
 233    /* Done:
 234     */
 235    return (void *)vs;
 236
 237 fail:
 238    FREE(vs);
 239    return NULL;
 240 }
 241
 242
 243 static void brw_delete_fs_state( struct pipe_context *pipe, void *prog )
 244 {
 245    struct brw_fragment_shader *fs = (struct brw_fragment_shader *)prog;
 246
 247    bo_reference(&fs->const_buffer, NULL);
 248    FREE( (void *)fs->tokens );
 249    FREE( fs );
 250 }
 251
 252
 253 static void brw_delete_vs_state( struct pipe_context *pipe, void *prog )
 254 {
 255    struct brw_fragment_shader *vs = (struct brw_fragment_shader *)prog;
 256
 257    /* Delete draw shader
 258     */
 259    FREE( (void *)vs->tokens );
 260    FREE( vs );
 261 }
 262
 263
 264 static void brw_set_constant_buffer(struct pipe_context *pipe,
 265                                      uint shader, uint index,
 266                                      struct pipe_buffer *buf)
 267 {
 268    struct brw_context *brw = brw_context(pipe);
 269
 270    assert(index == 0);
 271
 272    if (shader == PIPE_SHADER_FRAGMENT) {
 273       pipe_buffer_reference( &brw->curr.fragment_constants,
 274                              buf );
 275
 276       brw->state.dirty.mesa |= PIPE_NEW_FRAGMENT_CONSTANTS;
 277    }
 278    else {
 279       pipe_buffer_reference( &brw->curr.vertex_constants,
 280                              buf );
 281
 282       brw->state.dirty.mesa |= PIPE_NEW_VERTEX_CONSTANTS;
 283    }
 284 }
 285
 286
 287 void brw_pipe_shader_init( struct brw_context *brw )
 288 {
 289    brw->base.set_constant_buffer = brw_set_constant_buffer;
 290
 291    brw->base.create_vs_state = brw_create_vs_state;
 292    brw->base.bind_vs_state = brw_bind_vs_state;
 293    brw->base.delete_vs_state = brw_delete_vs_state;
 294
 295    brw->base.create_fs_state = brw_create_fs_state;
 296    brw->base.bind_fs_state = brw_bind_fs_state;
 297    brw->base.delete_fs_state = brw_delete_fs_state;
 298 }
 299
 300 void brw_pipe_shader_cleanup( struct brw_context *brw )
 301 {
 302    pipe_buffer_reference( &brw->curr.fragment_constants, NULL );
 303    pipe_buffer_reference( &brw->curr.vertex_constants, NULL );
 304 }