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
   8  * "Software"), to deal in the Software without restriction, including
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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    float zero4[4];
  49
  50 };
  51
  52
  53 void
  54 draw_pt_emit_prepare(struct pt_emit *emit,
  55                      unsigned prim,
  56                      unsigned *max_vertices)
  57 {
  58    struct draw_context *draw = emit->draw;
  59    const struct vertex_info *vinfo;
  60    unsigned dst_offset;
  61    struct translate_key hw_key;
  62    unsigned i;
  63
  64    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
  65     */
  66    draw_do_flush(draw, DRAW_FLUSH_BACKEND);
  67
  68    /* XXX: may need to defensively reset this later on as clipping can
  69     * clobber this state in the render backend.
  70     */
  71    emit->prim = prim;
  72
  73    draw->render->set_primitive(draw->render, emit->prim);
  74
  75    /* Must do this after set_primitive() above:
  76     */
  77    emit->vinfo = vinfo = draw->render->get_vertex_info(draw->render);
  78
  79    /* Translate from pipeline vertices to hw vertices.
  80     */
  81    dst_offset = 0;
  82    for (i = 0; i < vinfo->num_attribs; i++) {
  83       unsigned emit_sz = 0;
  84       unsigned src_buffer = 0;
  85       unsigned output_format;
  86       unsigned src_offset = vinfo->attrib[i].src_index * 4 * sizeof(float);
  87
  88       output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
  89       emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);
  90
  91       /* doesn't handle EMIT_OMIT */
  92       assert(emit_sz != 0);
  93
  94       if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
  95          src_buffer = 1;
  96          src_offset = 0;
  97       }
  98       else if (vinfo->attrib[i].src_index == DRAW_ATTR_NONEXIST) {
  99          /* elements which don't exist will get assigned zeros */
 100          src_buffer = 2;
 101          src_offset = 0;
 102       }
 103
 104       hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
 105       hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 106       hw_key.element[i].input_buffer = src_buffer;
 107       hw_key.element[i].input_offset = src_offset;
 108       hw_key.element[i].instance_divisor = 0;
 109       hw_key.element[i].output_format = output_format;
 110       hw_key.element[i].output_offset = dst_offset;
 111
 112       dst_offset += emit_sz;
 113    }
 114
 115    hw_key.nr_elements = vinfo->num_attribs;
 116    hw_key.output_stride = vinfo->size * 4;
 117
 118    if (!emit->translate ||
 119        translate_key_compare(&emit->translate->key, &hw_key) != 0) {
 120       translate_key_sanitize(&hw_key);
 121       emit->translate = translate_cache_find(emit->cache, &hw_key);
 122
 123       emit->translate->set_buffer(emit->translate, 2, &emit->zero4[0], 0, ~0);
 124    }
 125
 126    if (!vinfo->size)
 127       *max_vertices = 0;
 128    else
 129       *max_vertices = (draw->render->max_vertex_buffer_bytes /
 130                        (vinfo->size * 4));
 131 }
 132
 133
 134 void
 135 draw_pt_emit(struct pt_emit *emit,
 136              const struct draw_vertex_info *vert_info,
 137              const struct draw_prim_info *prim_info)
 138 {
 139    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 140    unsigned vertex_count = vert_info->count;
 141    unsigned stride = vert_info->stride;
 142    const ushort *elts = prim_info->elts;
 143    struct draw_context *draw = emit->draw;
 144    struct translate *translate = emit->translate;
 145    struct vbuf_render *render = draw->render;
 146    unsigned start, i;
 147    void *hw_verts;
 148
 149    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 150     */
 151    draw_do_flush(draw, DRAW_FLUSH_BACKEND);
 152
 153    if (vertex_count == 0)
 154       return;
 155
 156    /* XXX: and work out some way to coordinate the render primitive
 157     * between vbuf.c and here...
 158     */
 159    render->set_primitive(draw->render, prim_info->prim);
 160
 161    assert(vertex_count <= 65535);
 162    render->allocate_vertices(render,
 163                              (ushort)translate->key.output_stride,
 164                              (ushort)vertex_count);
 165
 166    hw_verts = render->map_vertices(render);
 167    if (!hw_verts) {
 168       debug_warn_once("map of vertex buffer failed (out of memory?)");
 169       return;
 170    }
 171
 172    translate->set_buffer(translate,
 173                          0,
 174                          vertex_data,
 175                          stride,
 176                          ~0);
 177
 178    translate->set_buffer(translate,
 179                          1,
 180                          &draw->rasterizer->point_size,
 181                          0,
 182                          ~0);
 183
 184    /* fetch/translate vertex attribs to fill hw_verts[] */
 185    translate->run(translate,
 186                   0,
 187                   vertex_count,
 188                   0,
 189                   0,
 190                   hw_verts);
 191
 192    render->unmap_vertices(render, 0, vertex_count - 1);
 193
 194    for (start = i = 0;
 195         i < prim_info->primitive_count;
 196         start += prim_info->primitive_lengths[i], i++)
 197    {
 198       render->draw_elements(render,
 199                             elts + start,
 200                             prim_info->primitive_lengths[i]);
 201    }
 202
 203    render->release_vertices(render);
 204 }
 205
 206
 207 void
 208 draw_pt_emit_linear(struct pt_emit *emit,
 209                     const struct draw_vertex_info *vert_info,
 210                     const struct draw_prim_info *prim_info)
 211 {
 212    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 213    unsigned stride = vert_info->stride;
 214    unsigned count = vert_info->count;
 215    struct draw_context *draw = emit->draw;
 216    struct translate *translate = emit->translate;
 217    struct vbuf_render *render = draw->render;
 218    void *hw_verts;
 219    unsigned start, i;
 220
 221 #if 0
 222    debug_printf("Linear emit\n");
 223 #endif
 224    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 225     */
 226    draw_do_flush(draw, DRAW_FLUSH_BACKEND);
 227
 228    /* XXX: and work out some way to coordinate the render primitive
 229     * between vbuf.c and here...
 230     */
 231    render->set_primitive(draw->render, prim_info->prim);
 232
 233    assert(count <= 65535);
 234    if (!render->allocate_vertices(render,
 235                                   (ushort)translate->key.output_stride,
 236                                   (ushort)count))
 237       goto fail;
 238
 239    hw_verts = render->map_vertices(render);
 240    if (!hw_verts)
 241       goto fail;
 242
 243    translate->set_buffer(translate, 0,
 244                          vertex_data, stride, count - 1);
 245
 246    translate->set_buffer(translate, 1,
 247                          &draw->rasterizer->point_size,
 248                          0, ~0);
 249
 250    translate->run(translate,
 251                   0,
 252                   count,
 253                   0,
 254                   0,
 255                   hw_verts);
 256
 257    if (0) {
 258       unsigned i;
 259       for (i = 0; i < count; i++) {
 260          debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
 261          draw_dump_emitted_vertex(emit->vinfo,
 262                                   (const uint8_t *)hw_verts +
 263                                   translate->key.output_stride * i);
 264       }
 265    }
 266
 267    render->unmap_vertices(render, 0, count - 1);
 268
 269    for (start = i = 0;
 270         i < prim_info->primitive_count;
 271         start += prim_info->primitive_lengths[i], i++)
 272    {
 273       render->draw_arrays(render,
 274                           start,
 275                           prim_info->primitive_lengths[i]);
 276    }
 277
 278    render->release_vertices(render);
 279
 280    return;
 281
 282 fail:
 283    debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
 284    return;
 285 }
 286
 287
 288 struct pt_emit *
 289 draw_pt_emit_create(struct draw_context *draw)
 290 {
 291    struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
 292    if (!emit)
 293       return NULL;
 294
 295    emit->draw = draw;
 296    emit->cache = translate_cache_create();
 297    if (!emit->cache) {
 298       FREE(emit);
 299       return NULL;
 300    }
 301
 302    emit->zero4[0] = emit->zero4[1] = emit->zero4[2] = emit->zero4[3] = 0.0f;
 303
 304    return emit;
 305 }
 306
 307
 308 void
 309 draw_pt_emit_destroy(struct pt_emit *emit)
 310 {
 311    if (emit->cache)
 312       translate_cache_destroy(emit->cache);
 313
 314    FREE(emit);
 315 }