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    render->allocate_vertices(render,
 162                              (ushort)translate->key.output_stride,
 163                              (ushort)vertex_count);
 164
 165    hw_verts = render->map_vertices(render);
 166    if (!hw_verts) {
 167       debug_warn_once("map of vertex buffer failed (out of memory?)");
 168       return;
 169    }
 170
 171    translate->set_buffer(translate,
 172                          0,
 173                          vertex_data,
 174                          stride,
 175                          ~0);
 176
 177    translate->set_buffer(translate,
 178                          1,
 179                          &draw->rasterizer->point_size,
 180                          0,
 181                          ~0);
 182
 183    /* fetch/translate vertex attribs to fill hw_verts[] */
 184    translate->run(translate,
 185                   0,
 186                   vertex_count,
 187                   0,
 188                   0,
 189                   hw_verts);
 190
 191    render->unmap_vertices(render, 0, vertex_count - 1);
 192
 193    for (start = i = 0;
 194         i < prim_info->primitive_count;
 195         start += prim_info->primitive_lengths[i], i++)
 196    {
 197       render->draw_elements(render,
 198                             elts + start,
 199                             prim_info->primitive_lengths[i]);
 200    }
 201
 202    render->release_vertices(render);
 203 }
 204
 205
 206 void
 207 draw_pt_emit_linear(struct pt_emit *emit,
 208                     const struct draw_vertex_info *vert_info,
 209                     const struct draw_prim_info *prim_info)
 210 {
 211    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 212    unsigned stride = vert_info->stride;
 213    unsigned count = vert_info->count;
 214    struct draw_context *draw = emit->draw;
 215    struct translate *translate = emit->translate;
 216    struct vbuf_render *render = draw->render;
 217    void *hw_verts;
 218    unsigned start, i;
 219
 220 #if 0
 221    debug_printf("Linear emit\n");
 222 #endif
 223    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 224     */
 225    draw_do_flush(draw, DRAW_FLUSH_BACKEND);
 226
 227    /* XXX: and work out some way to coordinate the render primitive
 228     * between vbuf.c and here...
 229     */
 230    render->set_primitive(draw->render, prim_info->prim);
 231
 232    if (!render->allocate_vertices(render,
 233                                   (ushort)translate->key.output_stride,
 234                                   (ushort)count))
 235       goto fail;
 236
 237    hw_verts = render->map_vertices(render);
 238    if (!hw_verts)
 239       goto fail;
 240
 241    translate->set_buffer(translate, 0,
 242                          vertex_data, stride, count - 1);
 243
 244    translate->set_buffer(translate, 1,
 245                          &draw->rasterizer->point_size,
 246                          0, ~0);
 247
 248    translate->run(translate,
 249                   0,
 250                   count,
 251                   0,
 252                   0,
 253                   hw_verts);
 254
 255    if (0) {
 256       unsigned i;
 257       for (i = 0; i < count; i++) {
 258          debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
 259          draw_dump_emitted_vertex(emit->vinfo,
 260                                   (const uint8_t *)hw_verts +
 261                                   translate->key.output_stride * i);
 262       }
 263    }
 264
 265    render->unmap_vertices(render, 0, count - 1);
 266
 267    for (start = i = 0;
 268         i < prim_info->primitive_count;
 269         start += prim_info->primitive_lengths[i], i++)
 270    {
 271       render->draw_arrays(render,
 272                           start,
 273                           prim_info->primitive_lengths[i]);
 274    }
 275
 276    render->release_vertices(render);
 277
 278    return;
 279
 280 fail:
 281    debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");
 282    return;
 283 }
 284
 285
 286 struct pt_emit *
 287 draw_pt_emit_create(struct draw_context *draw)
 288 {
 289    struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
 290    if (!emit)
 291       return NULL;
 292
 293    emit->draw = draw;
 294    emit->cache = translate_cache_create();
 295    if (!emit->cache) {
 296       FREE(emit);
 297       return NULL;
 298    }
 299
 300    emit->zero4[0] = emit->zero4[1] = emit->zero4[2] = emit->zero4[3] = 0.0f;
 301
 302    return emit;
 303 }
 304
 305
 306 void
 307 draw_pt_emit_destroy(struct pt_emit *emit)
 308 {
 309    if (emit->cache)
 310       translate_cache_destroy(emit->cache);
 311
 312    FREE(emit);
 313 }