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 if (util_format_is_pure_sint(draw->pt.vertex_element[i].src_format)) {
  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_SINT;
 101          key.element[nr].output_offset = dst_offset;
 102
 103          ei++;
 104          dst_offset += 4 * sizeof(int);
 105       } else if (util_format_is_pure_uint(draw->pt.vertex_element[i].src_format)) {
 106          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
 107          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 108          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 109          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 110          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 111          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_UINT;
 112          key.element[nr].output_offset = dst_offset;
 113
 114          ei++;
 115          dst_offset += 4 * sizeof(unsigned);
 116       } else {
 117          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
 118          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 119          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 120          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 121          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 122          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 123          key.element[nr].output_offset = dst_offset;
 124
 125          ei++;
 126          dst_offset += 4 * sizeof(float);
 127       }
 128
 129       nr++;
 130    }
 131
 132    assert(dst_offset <= vertex_size);
 133
 134    key.nr_elements = nr;
 135    key.output_stride = vertex_size;
 136
 137    if (!fetch->translate ||
 138        translate_key_compare(&fetch->translate->key, &key) != 0)
 139    {
 140       translate_key_sanitize(&key);
 141       fetch->translate = translate_cache_find(fetch->cache, &key);
 142    }
 143
 144 }
 145
 146
 147
 148
 149 void draw_pt_fetch_run( struct pt_fetch *fetch,
 150                         const unsigned *elts,
 151                         unsigned count,
 152                         char *verts )
 153 {
 154    struct draw_context *draw = fetch->draw;
 155    struct translate *translate = fetch->translate;
 156    unsigned i;
 157
 158    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 159       translate->set_buffer(translate,
 160                             i,
 161                             ((char *)draw->pt.user.vbuffer[i] +
 162                              draw->pt.vertex_buffer[i].buffer_offset),
 163                             draw->pt.vertex_buffer[i].stride,
 164                             draw->pt.max_index);
 165    }
 166
 167    translate->run_elts( translate,
 168                         elts,
 169                         count,
 170                         draw->instance_id,
 171                         verts );
 172
 173 }
 174
 175
 176 void draw_pt_fetch_run_linear( struct pt_fetch *fetch,
 177                                unsigned start,
 178                                unsigned count,
 179                                char *verts )
 180 {
 181    struct draw_context *draw = fetch->draw;
 182    struct translate *translate = fetch->translate;
 183    unsigned i;
 184
 185    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 186       translate->set_buffer(translate,
 187                             i,
 188                             ((char *)draw->pt.user.vbuffer[i] +
 189                              draw->pt.vertex_buffer[i].buffer_offset),
 190                             draw->pt.vertex_buffer[i].stride,
 191                             draw->pt.user.max_index + draw->pt.user.eltBias);
 192    }
 193
 194    translate->run( translate,
 195                    start,
 196                    count,
 197                    draw->instance_id,
 198                    verts );
 199 }
 200
 201
 202 struct pt_fetch *draw_pt_fetch_create( struct draw_context *draw )
 203 {
 204    struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
 205    if (!fetch)
 206       return NULL;
 207
 208    fetch->draw = draw;
 209    fetch->cache = translate_cache_create();
 210    if (!fetch->cache) {
 211       FREE(fetch);
 212       return NULL;
 213    }
 214
 215    return fetch;
 216 }
 217
 218 void draw_pt_fetch_destroy( struct pt_fetch *fetch )
 219 {
 220    if (fetch->cache)
 221       translate_cache_destroy(fetch->cache);
 222
 223    FREE(fetch);
 224 }
 225