src/gallium/auxiliary/draw/draw_pt_fetch.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 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 #include "util/u_memory.h"
  29 #include "util/u_math.h"
  30 #include "draw/draw_context.h"
  31 #include "draw/draw_private.h"
  32 #include "draw/draw_vbuf.h"
  33 #include "draw/draw_pt.h"
  34 #include "translate/translate.h"
  35 #include "translate/translate_cache.h"
  36
  37
  38 struct pt_fetch {
  39    struct draw_context *draw;
  40
  41    struct translate *translate;
  42
  43    unsigned vertex_size;
  44
  45    struct translate_cache *cache;
  46 };
  47
  48
  49 /* Perform the fetch from API vertex elements & vertex buffers, to a
  50  * contiguous set of float[4] attributes as required for the
  51  * vertex_shader->run_linear() method.
  52  *
  53  * This is used in all cases except pure passthrough
  54  * (draw_pt_fetch_emit.c) which has its own version to translate
  55  * directly to hw vertices.
  56  *
  57  */
  58 void draw_pt_fetch_prepare( struct pt_fetch *fetch,
  59                             unsigned vs_input_count,
  60                             unsigned vertex_size,
  61                             unsigned instance_id_index )
  62 {
  63    struct draw_context *draw = fetch->draw;
  64    unsigned nr_inputs;
  65    unsigned i, nr = 0, ei = 0;
  66    unsigned dst_offset = 0;
  67    unsigned num_extra_inputs = 0;
  68    struct translate_key key;
  69
  70    fetch->vertex_size = vertex_size;
  71
  72    /* Always emit/leave space for a vertex header.
  73     *
  74     * It's worth considering whether the vertex headers should contain
  75     * a pointer to the 'data', rather than having it inline.
  76     * Something to look at after we've fully switched over to the pt
  77     * paths.
  78     */
  79    {
  80       /* Need to set header->vertex_id = 0xffff somehow.
  81        */
  82       key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
  83       key.element[nr].input_format = PIPE_FORMAT_R32_FLOAT;
  84       key.element[nr].input_buffer = draw->pt.nr_vertex_buffers;
  85       key.element[nr].input_offset = 0;
  86       key.element[nr].instance_divisor = 0;
  87       key.element[nr].output_format = PIPE_FORMAT_R32_FLOAT;
  88       key.element[nr].output_offset = dst_offset;
  89       dst_offset += 1 * sizeof(float);
  90       nr++;
  91
  92
  93       /* Just leave the clip[] array untouched.
  94        */
  95       dst_offset += 4 * sizeof(float);
  96    }
  97
  98    if (instance_id_index != ~0) {
  99       num_extra_inputs++;
 100    }
 101
 102    assert(draw->pt.nr_vertex_elements + num_extra_inputs >= vs_input_count);
 103
 104    nr_inputs = MIN2(vs_input_count, draw->pt.nr_vertex_elements + num_extra_inputs);
 105
 106    for (i = 0; i < nr_inputs; i++) {
 107       if (i == instance_id_index) {
 108          key.element[nr].type = TRANSLATE_ELEMENT_INSTANCE_ID;
 109          key.element[nr].input_format = PIPE_FORMAT_R32_USCALED;
 110          key.element[nr].output_format = PIPE_FORMAT_R32_USCALED;
 111          key.element[nr].output_offset = dst_offset;
 112
 113          dst_offset += sizeof(uint);
 114       } else {
 115          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
 116          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 117          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 118          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 119          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 120          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 121          key.element[nr].output_offset = dst_offset;
 122
 123          ei++;
 124          dst_offset += 4 * sizeof(float);
 125       }
 126
 127       nr++;
 128    }
 129
 130    assert(dst_offset <= vertex_size);
 131
 132    key.nr_elements = nr;
 133    key.output_stride = vertex_size;
 134
 135
 136    if (!fetch->translate ||
 137        translate_key_compare(&fetch->translate->key, &key) != 0)
 138    {
 139       translate_key_sanitize(&key);
 140       fetch->translate = translate_cache_find(fetch->cache, &key);
 141
 142       {
 143          static struct vertex_header vh = { 0,
 144                                             1,
 145                                             0,
 146                                             UNDEFINED_VERTEX_ID,
 147                                             { .0f, .0f, .0f, .0f } };
 148
 149          fetch->translate->set_buffer(fetch->translate,
 150                                       draw->pt.nr_vertex_buffers,
 151                                       &vh,
 152                                       0,
 153                                       ~0);
 154       }
 155    }
 156
 157 }
 158
 159
 160
 161
 162 void draw_pt_fetch_run( struct pt_fetch *fetch,
 163                         const unsigned *elts,
 164                         unsigned count,
 165                         char *verts )
 166 {
 167    struct draw_context *draw = fetch->draw;
 168    struct translate *translate = fetch->translate;
 169    unsigned i;
 170
 171    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 172       translate->set_buffer(translate,
 173                             i,
 174                             ((char *)draw->pt.user.vbuffer[i] +
 175                              draw->pt.vertex_buffer[i].buffer_offset),
 176                             draw->pt.vertex_buffer[i].stride,
 177                             draw->pt.vertex_buffer[i].max_index);
 178    }
 179
 180    translate->run_elts( translate,
 181                         elts,
 182                         count,
 183                         draw->instance_id,
 184                         verts );
 185
 186 }
 187
 188
 189 void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
 190                                unsigned start,
 191                                unsigned count,
 192                                char *verts )
 193 {
 194    struct draw_context *draw = fetch->draw;
 195    struct translate *translate = fetch->translate;
 196    unsigned i;
 197
 198    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 199       translate->set_buffer(translate,
 200                             i,
 201                             ((char *)draw->pt.user.vbuffer[i] +
 202                              draw->pt.vertex_buffer[i].buffer_offset),
 203                             draw->pt.vertex_buffer[i].stride,
 204                             draw->pt.vertex_buffer[i].max_index);
 205    }
 206
 207    translate->run( translate,
 208                    start,
 209                    count,
 210                    draw->instance_id,
 211                    verts );
 212 }
 213
 214
 215 struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
 216 {
 217    struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
 218    if (!fetch)
 219       return NULL;
 220
 221    fetch->draw = draw;
 222    fetch->cache = translate_cache_create();
 223    if (!fetch->cache) {
 224       FREE(fetch);
 225       return NULL;
 226    }
 227
 228    return fetch;
 229 }
 230
 231 void draw_pt_fetch_destroy( struct pt_fetch *fetch )
 232 {
 233    if (fetch->cache)
 234       translate_cache_destroy(fetch->cache);
 235
 236    FREE(fetch);
 237 }
 238