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