src/gallium/auxiliary/draw/draw_pt_emit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   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
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  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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  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    if (!vinfo->size)
 117       *max_vertices = 0;
 118    else
 119       *max_vertices = (draw->render->max_vertex_buffer_bytes /
 120                        (vinfo->size * 4));
 121 }
 122
 123
 124 void
 125 draw_pt_emit(struct pt_emit *emit,
 126              const struct draw_vertex_info *vert_info,
 127              const struct draw_prim_info *prim_info)
 128 {
 129    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 130    unsigned vertex_count = vert_info->count;
 131    unsigned stride = vert_info->stride;
 132    const ushort *elts = prim_info->elts;
 133    struct draw_context *draw = emit->draw;
 134    struct translate *translate = emit->translate;
 135    struct vbuf_render *render = draw->render;
 136    unsigned start, i;
 137    void *hw_verts;
 138
 139    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 140     */
 141    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 142
 143    if (vertex_count == 0)
 144       return;
 145
 146    /* XXX: and work out some way to coordinate the render primitive
 147     * between vbuf.c and here...
 148     */
 149    render->set_primitive(draw->render, prim_info->prim);
 150
 151    render->allocate_vertices(render,
 152                              (ushort)translate->key.output_stride,
 153                              (ushort)vertex_count);
 154
 155    hw_verts = render->map_vertices( render );
 156    if (!hw_verts) {
 157       debug_warn_once("map of vertex buffer failed (out of memory?)");
 158       return;
 159    }
 160
 161    translate->set_buffer(translate,
 162                          0,
 163                          vertex_data,
 164                          stride,
 165                          ~0);
 166
 167    translate->set_buffer(translate,
 168                          1,
 169                          &draw->rasterizer->point_size,
 170                          0,
 171                          ~0);
 172
 173    /* fetch/translate vertex attribs to fill hw_verts[] */
 174    translate->run(translate,
 175                   0,
 176                   vertex_count,
 177                   draw->start_instance,
 178                   draw->instance_id,
 179                   hw_verts );
 180
 181    render->unmap_vertices(render, 0, vertex_count - 1);
 182
 183    for (start = i = 0;
 184         i < prim_info->primitive_count;
 185         start += prim_info->primitive_lengths[i], i++)
 186    {
 187       render->draw_elements(render,
 188                             elts + start,
 189                             prim_info->primitive_lengths[i]);
 190    }
 191
 192    render->release_vertices(render);
 193 }
 194
 195
 196 void
 197 draw_pt_emit_linear(struct pt_emit *emit,
 198                     const struct draw_vertex_info *vert_info,
 199                     const struct draw_prim_info *prim_info)
 200 {
 201    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 202    unsigned stride = vert_info->stride;
 203    unsigned count = vert_info->count;
 204    struct draw_context *draw = emit->draw;
 205    struct translate *translate = emit->translate;
 206    struct vbuf_render *render = draw->render;
 207    void *hw_verts;
 208    unsigned start, i;
 209
 210 #if 0
 211    debug_printf("Linear emit\n");
 212 #endif
 213    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 214     */
 215    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 216
 217    /* XXX: and work out some way to coordinate the render primitive
 218     * between vbuf.c and here...
 219     */
 220    render->set_primitive(draw->render, prim_info->prim);
 221
 222    if (!render->allocate_vertices(render,
 223                                   (ushort)translate->key.output_stride,
 224                                   (ushort)count))
 225       goto fail;
 226
 227    hw_verts = render->map_vertices( render );
 228    if (!hw_verts)
 229       goto fail;
 230
 231    translate->set_buffer(translate, 0,
 232                          vertex_data, stride, count - 1);
 233
 234    translate->set_buffer(translate, 1,
 235                          &draw->rasterizer->point_size,
 236                          0, ~0);
 237
 238    translate->run(translate,
 239                   0,
 240                   count,
 241                   draw->start_instance,
 242                   draw->instance_id,
 243                   hw_verts);
 244
 245    if (0) {
 246       unsigned i;
 247       for (i = 0; i < count; i++) {
 248          debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
 249          draw_dump_emitted_vertex( emit->vinfo,
 250                                    (const uint8_t *)hw_verts +
 251                                    translate->key.output_stride * i );
 252       }
 253    }
 254
 255    render->unmap_vertices( render, 0, count - 1 );
 256
 257    for (start = i = 0;
 258         i < prim_info->primitive_count;
 259         start += prim_info->primitive_lengths[i], i++)
 260    {
 261       render->draw_arrays(render,
 262                           start,
 263                           prim_info->primitive_lengths[i]);
 264    }
 265
 266    render->release_vertices(render);
 267
 268    return;
 269
 270 fail:
 271    debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
 272    return;
 273 }
 274
 275
 276 struct pt_emit *
 277 draw_pt_emit_create(struct draw_context *draw)
 278 {
 279    struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
 280    if (!emit)
 281       return NULL;
 282
 283    emit->draw = draw;
 284    emit->cache = translate_cache_create();
 285    if (!emit->cache) {
 286       FREE(emit);
 287       return NULL;
 288    }
 289
 290    return emit;
 291 }
 292
 293
 294 void
 295 draw_pt_emit_destroy(struct pt_emit *emit)
 296 {
 297    if (emit->cache)
 298       translate_cache_destroy(emit->cache);
 299
 300    FREE(emit);
 301 }