src/gallium/auxiliary/draw/draw_vs.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * 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, sub license, 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 portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36
  37 #include "pipe/p_shader_tokens.h"
  38
  39 #include "draw_private.h"
  40 #include "draw_context.h"
  41 #include "draw_vs.h"
  42
  43 #include "translate/translate.h"
  44 #include "translate/translate_cache.h"
  45
  46 #include "tgsi/tgsi_dump.h"
  47 #include "tgsi/tgsi_exec.h"
  48
  49 DEBUG_GET_ONCE_BOOL_OPTION(gallium_dump_vs, "GALLIUM_DUMP_VS", FALSE)
  50
  51
  52 /**
  53  * Set a vertex shader constant buffer.
  54  * \param slot  which constant buffer in [0, PIPE_MAX_CONSTANT_BUFFERS-1]
  55  * \param constants  the mapped buffer
  56  * \param size  size of buffer in bytes
  57  */
  58 void
  59 draw_vs_set_constants(struct draw_context *draw,
  60                       unsigned slot,
  61                       const void *constants,
  62                       unsigned size)
  63 {
  64    const int alignment = 16;
  65
  66    /* check if buffer is 16-byte aligned */
  67    if (((uintptr_t)constants) & (alignment - 1)) {
  68       /* if not, copy the constants into a new, 16-byte aligned buffer */
  69       if (size > draw->vs.const_storage_size[slot]) {
  70          if (draw->vs.aligned_constant_storage[slot]) {
  71             align_free((void *)draw->vs.aligned_constant_storage[slot]);
  72          }
  73          draw->vs.aligned_constant_storage[slot] =
  74             align_malloc(size, alignment);
  75       }
  76       assert(constants);
  77       memcpy((void *)draw->vs.aligned_constant_storage[slot],
  78              constants,
  79              size);
  80       constants = draw->vs.aligned_constant_storage[slot];
  81    }
  82
  83    draw->vs.aligned_constants[slot] = constants;
  84 }
  85
  86
  87 void draw_vs_set_viewport( struct draw_context *draw,
  88                            const struct pipe_viewport_state *viewport )
  89 {
  90 }
  91
  92
  93
  94 struct draw_vertex_shader *
  95 draw_create_vertex_shader(struct draw_context *draw,
  96                           const struct pipe_shader_state *shader)
  97 {
  98    struct draw_vertex_shader *vs = NULL;
  99
 100    if (draw->dump_vs) {
 101       tgsi_dump(shader->tokens, 0);
 102    }
 103
 104 #if HAVE_LLVM
 105    if (draw->pt.middle.llvm) {
 106       vs = draw_create_vs_llvm(draw, shader);
 107    }
 108 #endif
 109
 110    if (!vs) {
 111       vs = draw_create_vs_exec( draw, shader );
 112    }
 113
 114    if (vs)
 115    {
 116       uint i;
 117       for (i = 0; i < vs->info.num_outputs; i++) {
 118          if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
 119              vs->info.output_semantic_index[i] == 0)
 120             vs->position_output = i;
 121          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_EDGEFLAG &&
 122              vs->info.output_semantic_index[i] == 0)
 123             vs->edgeflag_output = i;
 124       }
 125    }
 126
 127    assert(vs);
 128    return vs;
 129 }
 130
 131
 132 void
 133 draw_bind_vertex_shader(struct draw_context *draw,
 134                         struct draw_vertex_shader *dvs)
 135 {
 136    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 137
 138    if (dvs)
 139    {
 140       draw->vs.vertex_shader = dvs;
 141       draw->vs.num_vs_outputs = dvs->info.num_outputs;
 142       draw->vs.position_output = dvs->position_output;
 143       draw->vs.edgeflag_output = dvs->edgeflag_output;
 144       dvs->prepare( dvs, draw );
 145    }
 146    else {
 147       draw->vs.vertex_shader = NULL;
 148       draw->vs.num_vs_outputs = 0;
 149    }
 150 }
 151
 152
 153 void
 154 draw_delete_vertex_shader(struct draw_context *draw,
 155                           struct draw_vertex_shader *dvs)
 156 {
 157    unsigned i;
 158
 159    for (i = 0; i < dvs->nr_variants; i++)
 160       dvs->variant[i]->destroy( dvs->variant[i] );
 161
 162    dvs->nr_variants = 0;
 163
 164    dvs->delete( dvs );
 165 }
 166
 167
 168
 169 boolean
 170 draw_vs_init( struct draw_context *draw )
 171 {
 172    draw->dump_vs = debug_get_option_gallium_dump_vs();
 173
 174    draw->vs.machine = tgsi_exec_machine_create();
 175    if (!draw->vs.machine)
 176       return FALSE;
 177
 178    draw->vs.emit_cache = translate_cache_create();
 179    if (!draw->vs.emit_cache)
 180       return FALSE;
 181
 182    draw->vs.fetch_cache = translate_cache_create();
 183    if (!draw->vs.fetch_cache)
 184       return FALSE;
 185
 186    return TRUE;
 187 }
 188
 189 void
 190 draw_vs_destroy( struct draw_context *draw )
 191 {
 192    uint i;
 193
 194    if (draw->vs.fetch_cache)
 195       translate_cache_destroy(draw->vs.fetch_cache);
 196
 197    if (draw->vs.emit_cache)
 198       translate_cache_destroy(draw->vs.emit_cache);
 199
 200    for (i = 0; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
 201       if (draw->vs.aligned_constant_storage[i]) {
 202          align_free((void *)draw->vs.aligned_constant_storage[i]);
 203       }
 204    }
 205
 206    tgsi_exec_machine_destroy(draw->vs.machine);
 207 }
 208
 209
 210 struct draw_vs_variant *
 211 draw_vs_lookup_variant( struct draw_vertex_shader *vs,
 212                         const struct draw_vs_variant_key *key )
 213 {
 214    struct draw_vs_variant *variant;
 215    unsigned i;
 216
 217    /* Lookup existing variant:
 218     */
 219    for (i = 0; i < vs->nr_variants; i++)
 220       if (draw_vs_variant_key_compare(key, &vs->variant[i]->key) == 0)
 221          return vs->variant[i];
 222
 223    /* Else have to create a new one:
 224     */
 225    variant = vs->create_variant( vs, key );
 226    if (variant == NULL)
 227       return NULL;
 228
 229    /* Add it to our list, could be smarter:
 230     */
 231    if (vs->nr_variants < Elements(vs->variant)) {
 232       vs->variant[vs->nr_variants++] = variant;
 233    }
 234    else {
 235       vs->last_variant++;
 236       vs->last_variant %= Elements(vs->variant);
 237       vs->variant[vs->last_variant]->destroy(vs->variant[vs->last_variant]);
 238       vs->variant[vs->last_variant] = variant;
 239    }
 240
 241    /* Done
 242     */
 243    return variant;
 244 }
 245
 246
 247 struct translate *
 248 draw_vs_get_fetch( struct draw_context *draw,
 249                    struct translate_key *key )
 250 {
 251    if (!draw->vs.fetch ||
 252        translate_key_compare(&draw->vs.fetch->key, key) != 0)
 253    {
 254       translate_key_sanitize(key);
 255       draw->vs.fetch = translate_cache_find(draw->vs.fetch_cache, key);
 256    }
 257
 258    return draw->vs.fetch;
 259 }
 260
 261 struct translate *
 262 draw_vs_get_emit( struct draw_context *draw,
 263                   struct translate_key *key )
 264 {
 265    if (!draw->vs.emit ||
 266        translate_key_compare(&draw->vs.emit->key, key) != 0)
 267    {
 268       translate_key_sanitize(key);
 269       draw->vs.emit = translate_cache_find(draw->vs.emit_cache, key);
 270    }
 271
 272    return draw->vs.emit;
 273 }