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