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    boolean need_edgeflags;
  46
  47    struct translate_cache *cache;
  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 {
  63    struct draw_context *draw = fetch->draw;
  64    unsigned nr_inputs;
  65    unsigned i, nr = 0;
  66    unsigned dst_offset = 0;
  67    struct translate_key key;
  68
  69    fetch->vertex_size = vertex_size;
  70
  71    /* Always emit/leave space for a vertex header.
  72     *
  73     * It's worth considering whether the vertex headers should contain
  74     * a pointer to the 'data', rather than having it inline.
  75     * Something to look at after we've fully switched over to the pt
  76     * paths.
  77     */
  78    {
  79       /* Need to set header->vertex_id = 0xffff somehow.
  80        */
  81       key.element[nr].input_format = PIPE_FORMAT_R32_FLOAT;
  82       key.element[nr].input_buffer = draw->pt.nr_vertex_buffers;
  83       key.element[nr].input_offset = 0;
  84       key.element[nr].output_format = PIPE_FORMAT_R32_FLOAT;
  85       key.element[nr].output_offset = dst_offset;
  86       dst_offset += 1 * sizeof(float);
  87       nr++;
  88
  89
  90       /* Just leave the clip[] array untouched.
  91        */
  92       dst_offset += 4 * sizeof(float);
  93    }
  94
  95    assert( draw->pt.nr_vertex_elements >= vs_input_count );
  96
  97    nr_inputs = MIN2( vs_input_count, draw->pt.nr_vertex_elements );
  98
  99    for (i = 0; i < nr_inputs; i++) {
 100       key.element[nr].input_format = draw->pt.vertex_element[i].src_format;
 101       key.element[nr].input_buffer = draw->pt.vertex_element[i].vertex_buffer_index;
 102       key.element[nr].input_offset = draw->pt.vertex_element[i].src_offset;
 103       key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 104       key.element[nr].output_offset = dst_offset;
 105
 106       dst_offset += 4 * sizeof(float);
 107       nr++;
 108    }
 109
 110    assert(dst_offset <= vertex_size);
 111
 112    key.nr_elements = nr;
 113    key.output_stride = vertex_size;
 114
 115
 116    if (!fetch->translate ||
 117        translate_key_compare(&fetch->translate->key, &key) != 0)
 118    {
 119       translate_key_sanitize(&key);
 120       fetch->translate = translate_cache_find(fetch->cache, &key);
 121
 122       {
 123          static struct vertex_header vh = { 0, 1, 0, UNDEFINED_VERTEX_ID, { .0f, .0f, .0f, .0f } };
 124          fetch->translate->set_buffer(fetch->translate,
 125                                       draw->pt.nr_vertex_buffers,
 126                                       &vh,
 127                                       0);
 128       }
 129    }
 130
 131    fetch->need_edgeflags = ((draw->rasterizer->fill_cw != PIPE_POLYGON_MODE_FILL ||
 132                              draw->rasterizer->fill_ccw != PIPE_POLYGON_MODE_FILL) &&
 133                             draw->pt.user.edgeflag);
 134 }
 135
 136
 137
 138
 139 void draw_pt_fetch_run( struct pt_fetch *fetch,
 140                         const unsigned *elts,
 141                         unsigned count,
 142                         char *verts )
 143 {
 144    struct draw_context *draw = fetch->draw;
 145    struct translate *translate = fetch->translate;
 146    unsigned i;
 147
 148    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 149       translate->set_buffer(translate,
 150                             i,
 151                             ((char *)draw->pt.user.vbuffer[i] +
 152                              draw->pt.vertex_buffer[i].buffer_offset),
 153                             draw->pt.vertex_buffer[i].stride );
 154    }
 155
 156    translate->run_elts( translate,
 157                         elts,
 158                         count,
 159                         verts );
 160
 161    /* Edgeflags are hard to fit into a translate program, populate
 162     * them separately if required.  In the setup above they are
 163     * defaulted to one, so only need this if there is reason to change
 164     * that default:
 165     */
 166    if (fetch->need_edgeflags) {
 167       for (i = 0; i < count; i++) {
 168          struct vertex_header *vh = (struct vertex_header *)(verts + i * fetch->vertex_size);
 169          vh->edgeflag = draw_pt_get_edgeflag( draw, elts[i] );
 170       }
 171    }
 172 }
 173
 174
 175 void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
 176                                unsigned start,
 177                                unsigned count,
 178                                char *verts )
 179 {
 180    struct draw_context *draw = fetch->draw;
 181    struct translate *translate = fetch->translate;
 182    unsigned i;
 183
 184    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 185       translate->set_buffer(translate,
 186                             i,
 187                             ((char *)draw->pt.user.vbuffer[i] +
 188                              draw->pt.vertex_buffer[i].buffer_offset),
 189                             draw->pt.vertex_buffer[i].stride );
 190    }
 191
 192    translate->run( translate,
 193                    start,
 194                    count,
 195                    verts );
 196
 197    /* Edgeflags are hard to fit into a translate program, populate
 198     * them separately if required.  In the setup above they are
 199     * defaulted to one, so only need this if there is reason to change
 200     * that default:
 201     */
 202    if (fetch->need_edgeflags) {
 203       for (i = 0; i < count; i++) {
 204          struct vertex_header *vh = (struct vertex_header *)(verts + i * fetch->vertex_size);
 205          vh->edgeflag = draw_pt_get_edgeflag( draw, start + i );
 206       }
 207    }
 208 }
 209
 210
 211 struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
 212 {
 213    struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
 214    if (!fetch)
 215       return NULL;
 216
 217    fetch->draw = draw;
 218    fetch->cache = translate_cache_create();
 219    if (!fetch->cache) {
 220       FREE(fetch);
 221       return NULL;
 222    }
 223
 224    return fetch;
 225 }
 226
 227 void draw_pt_fetch_destroy( struct pt_fetch *fetch )
 228 {
 229    if (fetch->cache)
 230       translate_cache_destroy(fetch->cache);
 231
 232    FREE(fetch);
 233 }
 234