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 "pipe/p_util.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 };
  44
  45 void draw_pt_emit_prepare( struct pt_emit *emit,
  46                            unsigned prim )
  47 {
  48    struct draw_context *draw = emit->draw;
  49    const struct vertex_info *vinfo;
  50    unsigned dst_offset;
  51    struct translate_key hw_key;
  52    unsigned i;
  53    boolean ok;
  54
  55    ok = draw->render->set_primitive(draw->render, prim);
  56    if (!ok) {
  57       assert(0);
  58       return;
  59    }
  60
  61    /* Must do this after set_primitive() above:
  62     */
  63    vinfo = draw->render->get_vertex_info(draw->render);
  64
  65
  66    /* Translate from pipeline vertices to hw vertices.
  67     */
  68    dst_offset = 0;
  69    for (i = 0; i < vinfo->num_attribs; i++) {
  70       unsigned emit_sz = 0;
  71       unsigned src_buffer = 0;
  72       unsigned output_format;
  73       unsigned src_offset = (vinfo->src_index[i] * 4 * sizeof(float) );
  74
  75
  76
  77       switch (vinfo->emit[i]) {
  78       case EMIT_4F:
  79          output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  80          emit_sz = 4 * sizeof(float);
  81          break;
  82       case EMIT_3F:
  83          output_format = PIPE_FORMAT_R32G32B32_FLOAT;
  84          emit_sz = 3 * sizeof(float);
  85          break;
  86       case EMIT_2F:
  87          output_format = PIPE_FORMAT_R32G32_FLOAT;
  88          emit_sz = 2 * sizeof(float);
  89          break;
  90       case EMIT_1F:
  91          output_format = PIPE_FORMAT_R32_FLOAT;
  92          emit_sz = 1 * sizeof(float);
  93          break;
  94       case EMIT_1F_PSIZE:
  95          output_format = PIPE_FORMAT_R32_FLOAT;
  96          emit_sz = 1 * sizeof(float);
  97          src_buffer = 1;
  98          src_offset = 0;
  99          break;
 100       case EMIT_4UB:
 101          output_format = PIPE_FORMAT_B8G8R8A8_UNORM;
 102          emit_sz = 4 * sizeof(ubyte);
 103       default:
 104          assert(0);
 105          output_format = PIPE_FORMAT_NONE;
 106          emit_sz = 0;
 107          break;
 108       }
 109
 110       hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 111       hw_key.element[i].input_buffer = src_buffer;
 112       hw_key.element[i].input_offset = src_offset;
 113       hw_key.element[i].output_format = output_format;
 114       hw_key.element[i].output_offset = dst_offset;
 115
 116       dst_offset += emit_sz;
 117    }
 118
 119    hw_key.nr_elements = vinfo->num_attribs;
 120    hw_key.output_stride = vinfo->size * 4;
 121
 122    if (!emit->translate ||
 123        translate_key_compare(&emit->translate->key, &hw_key) != 0)
 124    {
 125       translate_key_sanitize(&hw_key);
 126       emit->translate = translate_cache_find(emit->cache, &hw_key);
 127    }
 128 }
 129
 130
 131 void draw_pt_emit( struct pt_emit *emit,
 132                    const float (*vertex_data)[4],
 133                    unsigned vertex_count,
 134                    unsigned stride,
 135                    const ushort *elts,
 136                    unsigned count )
 137 {
 138    struct draw_context *draw = emit->draw;
 139    struct translate *translate = emit->translate;
 140    struct vbuf_render *render = draw->render;
 141    void *hw_verts;
 142
 143    /* XXX: need to flush to get prim_vbuf.c to release its allocation??
 144     */
 145    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 146
 147    hw_verts = render->allocate_vertices(render,
 148                                         (ushort)translate->key.output_stride,
 149                                         (ushort)count);
 150    if (!hw_verts) {
 151       assert(0);
 152       return;
 153    }
 154
 155    translate->set_buffer(translate,
 156                          0,
 157                          vertex_data,
 158                          stride );
 159
 160    translate->set_buffer(translate,
 161                          1,
 162                          &draw->rasterizer->point_size,
 163                          0);
 164
 165    translate->run( translate,
 166                    0,
 167                    vertex_count,
 168                    hw_verts );
 169
 170    render->draw(render,
 171                 elts,
 172                 count);
 173
 174    render->release_vertices(render,
 175                             hw_verts,
 176                             translate->key.output_stride,
 177                             vertex_count);
 178 }
 179
 180
 181 struct pt_emit *draw_pt_emit_create( struct draw_context *draw )
 182 {
 183    struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
 184    if (!emit)
 185       return NULL;
 186
 187    emit->draw = draw;
 188    emit->cache = translate_cache_create();
 189    if (!emit->cache) {
 190       FREE(emit);
 191       return NULL;
 192    }
 193
 194    return emit;
 195 }
 196
 197 void draw_pt_emit_destroy( struct pt_emit *emit )
 198 {
 199    if (emit->cache)
 200       translate_cache_destroy(emit->cache);
 201
 202    FREE(emit);
 203 }