src/gallium/auxiliary/draw/draw_pt_fetch.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 "util/u_math.h"
  30 #include "draw/draw_context.h"
  31 #include "draw/draw_private.h"
  32 #include "draw/draw_pt.h"
  33 #include "translate/translate.h"
  34 #include "translate/translate_cache.h"
  35
  36
  37 struct pt_fetch {
  38    struct draw_context *draw;
  39
  40    struct translate *translate;
  41
  42    unsigned vertex_size;
  43
  44    struct translate_cache *cache;
  45 };
  46
  47
  48 /* Perform the fetch from API vertex elements & vertex buffers, to a
  49  * contiguous set of float[4] attributes as required for the
  50  * vertex_shader->run_linear() method.
  51  *
  52  * This is used in all cases except pure passthrough
  53  * (draw_pt_fetch_emit.c) which has its own version to translate
  54  * directly to hw vertices.
  55  *
  56  */
  57 void draw_pt_fetch_prepare( struct pt_fetch *fetch,
  58                             unsigned vs_input_count,
  59                             unsigned vertex_size,
  60                             unsigned instance_id_index )
  61 {
  62    struct draw_context *draw = fetch->draw;
  63    unsigned nr_inputs;
  64    unsigned i, nr = 0, ei = 0;
  65    unsigned dst_offset = 0;
  66    unsigned num_extra_inputs = 0;
  67    struct translate_key key;
  68
  69    fetch->vertex_size = vertex_size;
  70
  71    /* Leave the clipmask/edgeflags/pad/vertex_id untouched
  72     */
  73    dst_offset += 1 * sizeof(float);
  74    /* Just leave the clip[] array untouched.
  75     */
  76    dst_offset += 4 * sizeof(float);
  77
  78    if (instance_id_index != ~0) {
  79       num_extra_inputs++;
  80    }
  81
  82    assert(draw->pt.nr_vertex_elements + num_extra_inputs >= vs_input_count);
  83
  84    nr_inputs = MIN2(vs_input_count, draw->pt.nr_vertex_elements + num_extra_inputs);
  85
  86    for (i = 0; i < nr_inputs; i++) {
  87       if (i == instance_id_index) {
  88          key.element[nr].type = TRANSLATE_ELEMENT_INSTANCE_ID;
  89          key.element[nr].input_format = PIPE_FORMAT_R32_USCALED;
  90          key.element[nr].output_format = PIPE_FORMAT_R32_USCALED;
  91          key.element[nr].output_offset = dst_offset;
  92
  93          dst_offset += sizeof(uint);
  94       } else {
  95          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
  96          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
  97          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
  98          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
  99          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 100          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 101          key.element[nr].output_offset = dst_offset;
 102
 103          ei++;
 104          dst_offset += 4 * sizeof(float);
 105       }
 106
 107       nr++;
 108    }
 109
 110    assert(dst_offset <= vertex_size);
 111
 112    key.nr_elements = nr;
 113    key.output_stride = vertex_size;
 114
 115    if (!fetch->translate ||
 116        translate_key_compare(&fetch->translate->key, &key) != 0)
 117    {
 118       translate_key_sanitize(&key);
 119       fetch->translate = translate_cache_find(fetch->cache, &key);
 120    }
 121
 122 }
 123
 124
 125
 126
 127 void draw_pt_fetch_run( struct pt_fetch *fetch,
 128                         const unsigned *elts,
 129                         unsigned count,
 130                         char *verts )
 131 {
 132    struct draw_context *draw = fetch->draw;
 133    struct translate *translate = fetch->translate;
 134    unsigned i;
 135
 136    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 137       translate->set_buffer(translate,
 138                             i,
 139                             ((char *)draw->pt.user.vbuffer[i] +
 140                              draw->pt.vertex_buffer[i].buffer_offset),
 141                             draw->pt.vertex_buffer[i].stride,
 142                             draw->pt.max_index);
 143    }
 144
 145    translate->run_elts( translate,
 146                         elts,
 147                         count,
 148                         draw->instance_id,
 149                         verts );
 150
 151 }
 152
 153
 154 void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
 155                                unsigned start,
 156                                unsigned count,
 157                                char *verts )
 158 {
 159    struct draw_context *draw = fetch->draw;
 160    struct translate *translate = fetch->translate;
 161    unsigned i;
 162
 163    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 164       translate->set_buffer(translate,
 165                             i,
 166                             ((char *)draw->pt.user.vbuffer[i] +
 167                              draw->pt.vertex_buffer[i].buffer_offset),
 168                             draw->pt.vertex_buffer[i].stride,
 169                             draw->pt.user.max_index);
 170    }
 171
 172    translate->run( translate,
 173                    start,
 174                    count,
 175                    draw->instance_id,
 176                    verts );
 177 }
 178
 179
 180 struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
 181 {
 182    struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
 183    if (!fetch)
 184       return NULL;
 185
 186    fetch->draw = draw;
 187    fetch->cache = translate_cache_create();
 188    if (!fetch->cache) {
 189       FREE(fetch);
 190       return NULL;
 191    }
 192
 193    return fetch;
 194 }
 195
 196 void draw_pt_fetch_destroy( struct pt_fetch *fetch )
 197 {
 198    if (fetch->cache)
 199       translate_cache_destroy(fetch->cache);
 200
 201    FREE(fetch);
 202 }
 203