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
  37 struct pt_emit {
  38    struct draw_context *draw;
  39
  40    struct translate *translate;
  41
  42    struct translate_cache *cache;
  43    unsigned prim;
  44
  45    const struct vertex_info *vinfo;
  46 };
  47
  48 void draw_pt_emit_prepare( struct pt_emit *emit,
  49                            unsigned prim,
  50                            unsigned *max_vertices )
  51 {
  52    struct draw_context *draw = emit->draw;
  53    const struct vertex_info *vinfo;
  54    unsigned dst_offset;
  55    struct translate_key hw_key;
  56    unsigned i;
  57    boolean ok;
  58
  59    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
  60     */
  61    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
  62
  63
  64    /* XXX: may need to defensively reset this later on as clipping can
  65     * clobber this state in the render backend.
  66     */
  67    emit->prim = prim;
  68
  69    ok = draw->render->set_primitive(draw->render, emit->prim);
  70    if (!ok) {
  71       assert(0);
  72       return;
  73    }
  74
  75    /* Must do this after set_primitive() above:
  76     */
  77    emit->vinfo = vinfo = draw->render->get_vertex_info(draw->render);
  78
  79
  80    /* Translate from pipeline vertices to hw vertices.
  81     */
  82    dst_offset = 0;
  83    for (i = 0; i < vinfo->num_attribs; i++) {
  84       unsigned emit_sz = 0;
  85       unsigned src_buffer = 0;
  86       unsigned output_format;
  87       unsigned src_offset = (vinfo->attrib[i].src_index * 4 * sizeof(float) );
  88
  89       output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);
  90       emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);
  91
  92       /* doesn't handle EMIT_OMIT */
  93       assert(emit_sz != 0);
  94
  95       if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {
  96          src_buffer = 1;
  97          src_offset = 0;
  98       }
  99
 100       hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL;
 101       hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 102       hw_key.element[i].input_buffer = src_buffer;
 103       hw_key.element[i].input_offset = src_offset;
 104       hw_key.element[i].instance_divisor = 0;
 105       hw_key.element[i].output_format = output_format;
 106       hw_key.element[i].output_offset = dst_offset;
 107
 108       dst_offset += emit_sz;
 109    }
 110
 111    hw_key.nr_elements = vinfo->num_attribs;
 112    hw_key.output_stride = vinfo->size * 4;
 113
 114    if (!emit->translate ||
 115        translate_key_compare(&emit->translate->key, &hw_key) != 0)
 116    {
 117       translate_key_sanitize(&hw_key);
 118       emit->translate = translate_cache_find(emit->cache, &hw_key);
 119    }
 120
 121    *max_vertices = (draw->render->max_vertex_buffer_bytes /
 122                     (vinfo->size * 4));
 123 }
 124
 125
 126 void draw_pt_emit( struct pt_emit *emit,
 127                          const struct draw_vertex_info *vert_info,
 128                          const struct draw_prim_info *prim_info)
 129 {
 130    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 131    unsigned vertex_count = vert_info->count;
 132    unsigned stride = vert_info->stride;
 133    const ushort *elts = prim_info->elts;
 134    struct draw_context *draw = emit->draw;
 135    struct translate *translate = emit->translate;
 136    struct vbuf_render *render = draw->render;
 137    unsigned start, i;
 138    void *hw_verts;
 139
 140    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 141     */
 142    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 143
 144    if (vertex_count == 0)
 145       return;
 146
 147    /* XXX: and work out some way to coordinate the render primitive
 148     * between vbuf.c and here...
 149     */
 150    if (!draw->render->set_primitive(draw->render, emit->prim)) {
 151       assert(0);
 152       return;
 153    }
 154
 155    render->allocate_vertices(render,
 156                              (ushort)translate->key.output_stride,
 157                              (ushort)vertex_count);
 158
 159    hw_verts = render->map_vertices( render );
 160    if (!hw_verts) {
 161       assert(0);
 162       return;
 163    }
 164
 165    translate->set_buffer(translate,
 166                          0,
 167                          vertex_data,
 168                          stride,
 169                          ~0);
 170
 171    translate->set_buffer(translate,
 172                          1,
 173                          &draw->rasterizer->point_size,
 174                          0,
 175                          ~0);
 176
 177    /* fetch/translate vertex attribs to fill hw_verts[] */
 178    translate->run( translate,
 179                    0,
 180                    vertex_count,
 181                    draw->instance_id,
 182                    hw_verts );
 183
 184    render->unmap_vertices( render,
 185                            0,
 186                            vertex_count - 1 );
 187
 188    for (start = i = 0;
 189         i < prim_info->primitive_count;
 190         start += prim_info->primitive_lengths[i], i++)
 191    {
 192       render->draw_elements(render,
 193                             elts + start,
 194                             prim_info->primitive_lengths[i]);
 195    }
 196
 197    render->release_vertices(render);
 198 }
 199
 200
 201 void draw_pt_emit_linear(struct pt_emit *emit,
 202                          const struct draw_vertex_info *vert_info,
 203                          const struct draw_prim_info *prim_info)
 204 {
 205    const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;
 206    unsigned stride = vert_info->stride;
 207    unsigned count = vert_info->count;
 208    struct draw_context *draw = emit->draw;
 209    struct translate *translate = emit->translate;
 210    struct vbuf_render *render = draw->render;
 211    void *hw_verts;
 212    unsigned start, i;
 213
 214 #if 0
 215    debug_printf("Linear emit\n");
 216 #endif
 217    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 218     */
 219    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 220
 221    /* XXX: and work out some way to coordinate the render primitive
 222     * between vbuf.c and here...
 223     */
 224    if (!draw->render->set_primitive(draw->render, emit->prim))
 225       goto fail;
 226
 227    if (!render->allocate_vertices(render,
 228                                   (ushort)translate->key.output_stride,
 229                                   (ushort)count))
 230       goto fail;
 231
 232    hw_verts = render->map_vertices( render );
 233    if (!hw_verts)
 234       goto fail;
 235
 236    translate->set_buffer(translate, 0,
 237                          vertex_data, stride, count - 1);
 238
 239    translate->set_buffer(translate, 1,
 240                          &draw->rasterizer->point_size,
 241                          0, ~0);
 242
 243    translate->run(translate,
 244                   0,
 245                   count,
 246                   draw->instance_id,
 247                   hw_verts);
 248
 249    if (0) {
 250       unsigned i;
 251       for (i = 0; i < count; i++) {
 252          debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);
 253          draw_dump_emitted_vertex( emit->vinfo,
 254                                    (const uint8_t *)hw_verts +
 255                                    translate->key.output_stride * i );
 256       }
 257    }
 258
 259    render->unmap_vertices( render, 0, count - 1 );
 260
 261    for (start = i = 0;
 262         i < prim_info->primitive_count;
 263         start += prim_info->primitive_lengths[i], i++)
 264    {
 265       render->draw_arrays(render,
 266                           start,
 267                           prim_info->primitive_lengths[i]);
 268    }
 269
 270    render->release_vertices(render);
 271
 272    return;
 273
 274 fail:
 275    assert(0);
 276    return;
 277 }
 278
 279 struct pt_emit *draw_pt_emit_create( struct draw_context *draw )
 280 {
 281    struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
 282    if (!emit)
 283       return NULL;
 284
 285    emit->draw = draw;
 286    emit->cache = translate_cache_create();
 287    if (!emit->cache) {
 288       FREE(emit);
 289       return NULL;
 290    }
 291
 292    return emit;
 293 }
 294
 295 void draw_pt_emit_destroy( struct pt_emit *emit )
 296 {
 297    if (emit->cache)
 298       translate_cache_destroy(emit->cache);
 299
 300    FREE(emit);
 301 }