src/gallium/auxiliary/draw/draw_pt_emit.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 "draw/draw_context.h"
  30 #include "draw/draw_private.h"
  31 #include "draw/draw_vbuf.h"
  32 #include "draw/draw_vertex.h"
  33 #include "draw/draw_pt.h"
  34 #include "translate/translate.h"
  35 #include "translate/translate_cache.h"
  36 #include "util/u_prim.h"
  37
  38 struct pt_emit {
  39    struct draw_context *draw;
  40
  41    struct translate *translate;
  42
  43    struct translate_cache *cache;
  44    unsigned prim;
  45
  46    const struct vertex_info *vinfo;
  47 };
  48
  49
  50 void
  51 draw_pt_emit_prepare(struct pt_emit *emit,
  52                      unsigned prim,
  53                      unsigned *max_vertices)
  54 {
  55    struct draw_context *draw = emit->draw;
  56    const struct vertex_info *vinfo;
  57    unsigned dst_offset;
  58    struct translate_key hw_key;
  59    unsigned i;
  60
  61    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
  62     */
  63    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
  64
  65    /* XXX: may need to defensively reset this later on as clipping can
  66     * clobber this state in the render backend.
  67     */
  68    emit->prim = prim;
  69
  70    draw->render->set_primitive(draw->render, emit->prim);
  71
  72    /* Must do this after set_primitive() above:
  73     */
  74    emit->vinfo = vinfo = draw->render->get_vertex_info(draw->render);
  75
  76    /* Translate from pipeline vertices to hw vertices.
  77     */
  78    dst_offset = 0;
  79    for (i = 0; i < vinfo->num_attribs; i++) {
  80       unsigned emit_sz = 0;
  81       unsigned src_buffer = 0;
  82       unsigned output_format;
  83       unsigned src_offset = (vinfo->attrib[i].src_index * 4 * sizeof(float) );
  84
  85       output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
  86       emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);
  87
  88       /* doesn't handle EMIT_OMIT */
  89       assert(emit_sz != 0);
  90
  91       if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
  92          src_buffer = 1;
  93          src_offset = 0;
  94       }
  95
  96       hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
  97       hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  98       hw_key.element[i].input_buffer = src_buffer;
  99       hw_key.element[i].input_offset = src_offset;
 100       hw_key.element[i].instance_divisor = 0;
 101       hw_key.element[i].output_format = output_format;
 102       hw_key.element[i].output_offset = dst_offset;
 103
 104       dst_offset += emit_sz;
 105    }
 106
 107    hw_key.nr_elements = vinfo->num_attribs;
 108    hw_key.output_stride = vinfo->size * 4;
 109
 110    if (!emit->translate ||
 111        translate_key_compare(&emit->translate->key, &hw_key) != 0) {
 112       translate_key_sanitize(&hw_key);
 113       emit->translate = translate_cache_find(emit->cache, &hw_key);
 114    }
 115
 116    *max_vertices = (draw->render->max_vertex_buffer_bytes /
 117                     (vinfo->size * 4));
 118 }
 119
 120
 121 void
 122 draw_pt_emit(struct pt_emit *emit,
 123              const struct draw_vertex_info *vert_info,
 124              const struct draw_prim_info *prim_info)
 125 {
 126    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 127    unsigned vertex_count = vert_info->count;
 128    unsigned stride = vert_info->stride;
 129    const ushort *elts = prim_info->elts;
 130    struct draw_context *draw = emit->draw;
 131    struct translate *translate = emit->translate;
 132    struct vbuf_render *render = draw->render;
 133    unsigned start, i;
 134    void *hw_verts;
 135
 136    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 137     */
 138    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 139
 140    if (vertex_count == 0)
 141       return;
 142
 143    /* XXX: and work out some way to coordinate the render primitive
 144     * between vbuf.c and here...
 145     */
 146    draw->render->set_primitive(draw->render, emit->prim);
 147
 148    render->allocate_vertices(render,
 149                              (ushort)translate->key.output_stride,
 150                              (ushort)vertex_count);
 151
 152    hw_verts = render->map_vertices( render );
 153    if (!hw_verts) {
 154       debug_warn_once("map of vertex buffer failed (out of memory?)");
 155       return;
 156    }
 157
 158    translate->set_buffer(translate,
 159                          0,
 160                          vertex_data,
 161                          stride,
 162                          ~0);
 163
 164    translate->set_buffer(translate,
 165                          1,
 166                          &draw->rasterizer->point_size,
 167                          0,
 168                          ~0);
 169
 170    /* fetch/translate vertex attribs to fill hw_verts[] */
 171    translate->run(translate,
 172                   0,
 173                   vertex_count,
 174                   draw->start_instance,
 175                   draw->instance_id,
 176                   hw_verts );
 177
 178    render->unmap_vertices(render, 0, vertex_count - 1);
 179
 180    for (start = i = 0;
 181         i < prim_info->primitive_count;
 182         start += prim_info->primitive_lengths[i], i++)
 183    {
 184       render->draw_elements(render,
 185                             elts + start,
 186                             prim_info->primitive_lengths[i]);
 187    }
 188
 189    render->release_vertices(render);
 190 }
 191
 192
 193 void
 194 draw_pt_emit_linear(struct pt_emit *emit,
 195                     const struct draw_vertex_info *vert_info,
 196                     const struct draw_prim_info *prim_info)
 197 {
 198    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 199    unsigned stride = vert_info->stride;
 200    unsigned count = vert_info->count;
 201    struct draw_context *draw = emit->draw;
 202    struct translate *translate = emit->translate;
 203    struct vbuf_render *render = draw->render;
 204    void *hw_verts;
 205    unsigned start, i;
 206
 207 #if 0
 208    debug_printf("Linear emit\n");
 209 #endif
 210    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 211     */
 212    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 213
 214    /* XXX: and work out some way to coordinate the render primitive
 215     * between vbuf.c and here...
 216     */
 217    draw->render->set_primitive(draw->render, emit->prim);
 218
 219    if (!render->allocate_vertices(render,
 220                                   (ushort)translate->key.output_stride,
 221                                   (ushort)count))
 222       goto fail;
 223
 224    hw_verts = render->map_vertices( render );
 225    if (!hw_verts)
 226       goto fail;
 227
 228    translate->set_buffer(translate, 0,
 229                          vertex_data, stride, count - 1);
 230
 231    translate->set_buffer(translate, 1,
 232                          &draw->rasterizer->point_size,
 233                          0, ~0);
 234
 235    translate->run(translate,
 236                   0,
 237                   count,
 238                   draw->start_instance,
 239                   draw->instance_id,
 240                   hw_verts);
 241
 242    if (0) {
 243       unsigned i;
 244       for (i = 0; i < count; i++) {
 245          debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
 246          draw_dump_emitted_vertex( emit->vinfo,
 247                                    (const uint8_t *)hw_verts +
 248                                    translate->key.output_stride * i );
 249       }
 250    }
 251
 252    render->unmap_vertices( render, 0, count - 1 );
 253
 254    for (start = i = 0;
 255         i < prim_info->primitive_count;
 256         start += prim_info->primitive_lengths[i], i++)
 257    {
 258       render->draw_arrays(render,
 259                           start,
 260                           prim_info->primitive_lengths[i]);
 261    }
 262
 263    render->release_vertices(render);
 264
 265    return;
 266
 267 fail:
 268    debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
 269    return;
 270 }
 271
 272
 273 struct pt_emit *
 274 draw_pt_emit_create(struct draw_context *draw)
 275 {
 276    struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
 277    if (!emit)
 278       return NULL;
 279
 280    emit->draw = draw;
 281    emit->cache = translate_cache_create();
 282    if (!emit->cache) {
 283       FREE(emit);
 284       return NULL;
 285    }
 286
 287    return emit;
 288 }
 289
 290
 291 void
 292 draw_pt_emit_destroy(struct pt_emit *emit)
 293 {
 294    if (emit->cache)
 295       translate_cache_destroy(emit->cache);
 296
 297    FREE(emit);
 298 }