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      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 (at) 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             draw->vs.const_storage_size[slot] = 0;
     73          }
     74          draw->vs.aligned_constant_storage[slot] =
     75             align_malloc(size, alignment);
     76          if (draw->vs.aligned_constant_storage[slot]) {
     77             draw->vs.const_storage_size[slot] = size;
     78          }
     79       }
     80       assert(constants);
     81       if (draw->vs.aligned_constant_storage[slot]) {
     82          memcpy((void *)draw->vs.aligned_constant_storage[slot],
     83                 constants,
     84                 size);
     85       }
     86       constants = draw->vs.aligned_constant_storage[slot];
     87    }
     88 
     89    draw->vs.aligned_constants[slot] = constants;
     90 }
     91 
     92 
     93 void draw_vs_set_viewport( struct draw_context *draw,
     94                            const struct pipe_viewport_state *viewport )
     95 {
     96 }
     97 
     98 
     99 
    100 struct draw_vertex_shader *
    101 draw_create_vertex_shader(struct draw_context *draw,
    102                           const struct pipe_shader_state *shader)
    103 {
    104    struct draw_vertex_shader *vs = NULL;
    105 
    106    if (draw->dump_vs) {
    107       tgsi_dump(shader->tokens, 0);
    108    }
    109 
    110 #if HAVE_LLVM
    111    if (draw->pt.middle.llvm) {
    112       vs = draw_create_vs_llvm(draw, shader);
    113    }
    114 #endif
    115 
    116    if (!vs) {
    117       vs = draw_create_vs_exec( draw, shader );
    118    }
    119 
    120    if (vs)
    121    {
    122       uint i;
    123       bool found_clipvertex = FALSE;
    124       for (i = 0; i < vs->info.num_outputs; i++) {
    125          if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_POSITION &&
    126              vs->info.output_semantic_index[i] == 0)
    127             vs->position_output = i;
    128          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_EDGEFLAG &&
    129              vs->info.output_semantic_index[i] == 0)
    130             vs->edgeflag_output = i;
    131          else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPVERTEX &&
    132                   vs->info.output_semantic_index[i] == 0) {
    133             found_clipvertex = TRUE;
    134             vs->clipvertex_output = i;
    135          } else if (vs->info.output_semantic_name[i] == TGSI_SEMANTIC_CLIPDIST) {
    136             if (vs->info.output_semantic_index[i] == 0)
    137                vs->clipdistance_output[0] = i;
    138             else
    139                vs->clipdistance_output[1] = i;
    140          }
    141       }
    142       if (!found_clipvertex)
    143          vs->clipvertex_output = vs->position_output;
    144    }
    145 
    146    assert(vs);
    147    return vs;
    148 }
    149 
    150 
    151 void
    152 draw_bind_vertex_shader(struct draw_context *draw,
    153                         struct draw_vertex_shader *dvs)
    154 {
    155    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
    156 
    157    if (dvs)
    158    {
    159       draw->vs.vertex_shader = dvs;
    160       draw->vs.num_vs_outputs = dvs->info.num_outputs;
    161       draw->vs.position_output = dvs->position_output;
    162       draw->vs.edgeflag_output = dvs->edgeflag_output;
    163       draw->vs.clipvertex_output = dvs->clipvertex_output;
    164       draw->vs.clipdistance_output[0] = dvs->clipdistance_output[0];
    165       draw->vs.clipdistance_output[1] = dvs->clipdistance_output[1];
    166       dvs->prepare( dvs, draw );
    167    }
    168    else {
    169       draw->vs.vertex_shader = NULL;
    170       draw->vs.num_vs_outputs = 0;
    171    }
    172 }
    173 
    174 
    175 void
    176 draw_delete_vertex_shader(struct draw_context *draw,
    177                           struct draw_vertex_shader *dvs)
    178 {
    179    unsigned i;
    180 
    181    for (i = 0; i < dvs->nr_variants; i++)
    182       dvs->variant[i]->destroy( dvs->variant[i] );
    183 
    184    dvs->nr_variants = 0;
    185 
    186    dvs->delete( dvs );
    187 }
    188 
    189 
    190 
    191 boolean
    192 draw_vs_init( struct draw_context *draw )
    193 {
    194    draw->dump_vs = debug_get_option_gallium_dump_vs();
    195 
    196    draw->vs.tgsi.machine = tgsi_exec_machine_create();
    197    if (!draw->vs.tgsi.machine)
    198       return FALSE;
    199 
    200    draw->vs.emit_cache = translate_cache_create();
    201    if (!draw->vs.emit_cache)
    202       return FALSE;
    203 
    204    draw->vs.fetch_cache = translate_cache_create();
    205    if (!draw->vs.fetch_cache)
    206       return FALSE;
    207 
    208    return TRUE;
    209 }
    210 
    211 void
    212 draw_vs_destroy( struct draw_context *draw )
    213 {
    214    uint i;
    215 
    216    if (draw->vs.fetch_cache)
    217       translate_cache_destroy(draw->vs.fetch_cache);
    218 
    219    if (draw->vs.emit_cache)
    220       translate_cache_destroy(draw->vs.emit_cache);
    221 
    222    for (i = 0; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
    223       if (draw->vs.aligned_constant_storage[i]) {
    224          align_free((void *)draw->vs.aligned_constant_storage[i]);
    225       }
    226    }
    227 
    228    tgsi_exec_machine_destroy(draw->vs.tgsi.machine);
    229 }
    230 
    231 
    232 struct draw_vs_variant *
    233 draw_vs_lookup_variant( struct draw_vertex_shader *vs,
    234                         const struct draw_vs_variant_key *key )
    235 {
    236    struct draw_vs_variant *variant;
    237    unsigned i;
    238 
    239    /* Lookup existing variant:
    240     */
    241    for (i = 0; i < vs->nr_variants; i++)
    242       if (draw_vs_variant_key_compare(key, &vs->variant[i]->key) == 0)
    243          return vs->variant[i];
    244 
    245    /* Else have to create a new one:
    246     */
    247    variant = vs->create_variant( vs, key );
    248    if (variant == NULL)
    249       return NULL;
    250 
    251    /* Add it to our list, could be smarter:
    252     */
    253    if (vs->nr_variants < Elements(vs->variant)) {
    254       vs->variant[vs->nr_variants++] = variant;
    255    }
    256    else {
    257       vs->last_variant++;
    258       vs->last_variant %= Elements(vs->variant);
    259       vs->variant[vs->last_variant]->destroy(vs->variant[vs->last_variant]);
    260       vs->variant[vs->last_variant] = variant;
    261    }
    262 
    263    /* Done
    264     */
    265    return variant;
    266 }
    267 
    268 
    269 struct translate *
    270 draw_vs_get_fetch( struct draw_context *draw,
    271                    struct translate_key *key )
    272 {
    273    if (!draw->vs.fetch ||
    274        translate_key_compare(&draw->vs.fetch->key, key) != 0)
    275    {
    276       translate_key_sanitize(key);
    277       draw->vs.fetch = translate_cache_find(draw->vs.fetch_cache, key);
    278    }
    279 
    280    return draw->vs.fetch;
    281 }
    282 
    283 struct translate *
    284 draw_vs_get_emit( struct draw_context *draw,
    285                   struct translate_key *key )
    286 {
    287    if (!draw->vs.emit ||
    288        translate_key_compare(&draw->vs.emit->key, key) != 0)
    289    {
    290       translate_key_sanitize(key);
    291       draw->vs.emit = translate_cache_find(draw->vs.emit_cache, key);
    292    }
    293 
    294    return draw->vs.emit;
    295 }
    296