src/gallium/auxiliary/draw/draw_pt_fetch.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  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 "util/u_format.h"
  31 #include "draw/draw_context.h"
  32 #include "draw/draw_private.h"
  33 #include "draw/draw_pt.h"
  34 #include "translate/translate.h"
  35 #include "translate/translate_cache.h"
  36
  37
  38 struct pt_fetch {
  39    struct draw_context *draw;
  40
  41    struct translate *translate;
  42
  43    unsigned vertex_size;
  44
  45    struct translate_cache *cache;
  46 };
  47
  48
  49 /**
  50  * Perform the fetch from API vertex elements & vertex buffers, to a
  51  * contiguous set of float[4] attributes as required for the
  52  * vertex_shader->run_linear() method.
  53  *
  54  * This is used in all cases except pure passthrough
  55  * (draw_pt_fetch_emit.c) which has its own version to translate
  56  * directly to hw vertices.
  57  *
  58  */
  59 void
  60 draw_pt_fetch_prepare(struct pt_fetch *fetch,
  61                       unsigned vs_input_count,
  62                       unsigned vertex_size,
  63                       unsigned instance_id_index)
  64 {
  65    struct draw_context *draw = fetch->draw;
  66    unsigned nr_inputs;
  67    unsigned i, nr = 0, ei = 0;
  68    unsigned dst_offset = 0;
  69    unsigned num_extra_inputs = 0;
  70    struct translate_key key;
  71
  72    fetch->vertex_size = vertex_size;
  73
  74    /* Leave the clipmask/edgeflags/pad/vertex_id untouched
  75     */
  76    dst_offset += 1 * sizeof(float);
  77    /* Just leave the clip[] and pre_clip_pos[] array untouched.
  78     */
  79    dst_offset += 8 * sizeof(float);
  80
  81    if (instance_id_index != ~0) {
  82       num_extra_inputs++;
  83    }
  84
  85    assert(draw->pt.nr_vertex_elements + num_extra_inputs >= vs_input_count);
  86
  87    nr_inputs = MIN2(vs_input_count, draw->pt.nr_vertex_elements + num_extra_inputs);
  88
  89    for (i = 0; i < nr_inputs; i++) {
  90       if (i == instance_id_index) {
  91          key.element[nr].type = TRANSLATE_ELEMENT_INSTANCE_ID;
  92          key.element[nr].input_format = PIPE_FORMAT_R32_USCALED;
  93          key.element[nr].output_format = PIPE_FORMAT_R32_USCALED;
  94          key.element[nr].output_offset = dst_offset;
  95
  96          dst_offset += sizeof(uint);
  97       } else if (util_format_is_pure_sint(draw->pt.vertex_element[i].src_format)) {
  98          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
  99          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 100          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 101          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 102          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 103          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_SINT;
 104          key.element[nr].output_offset = dst_offset;
 105
 106          ei++;
 107          dst_offset += 4 * sizeof(int);
 108       } else if (util_format_is_pure_uint(draw->pt.vertex_element[i].src_format)) {
 109          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
 110          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 111          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 112          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 113          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 114          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_UINT;
 115          key.element[nr].output_offset = dst_offset;
 116
 117          ei++;
 118          dst_offset += 4 * sizeof(unsigned);
 119       } else {
 120          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
 121          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 122          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 123          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 124          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 125          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 126          key.element[nr].output_offset = dst_offset;
 127
 128          ei++;
 129          dst_offset += 4 * sizeof(float);
 130       }
 131
 132       nr++;
 133    }
 134
 135    assert(dst_offset <= vertex_size);
 136
 137    key.nr_elements = nr;
 138    key.output_stride = vertex_size;
 139
 140    if (!fetch->translate ||
 141        translate_key_compare(&fetch->translate->key, &key) != 0)
 142    {
 143       translate_key_sanitize(&key);
 144       fetch->translate = translate_cache_find(fetch->cache, &key);
 145    }
 146 }
 147
 148
 149 void
 150 draw_pt_fetch_run(struct pt_fetch *fetch,
 151                   const unsigned *elts,
 152                   unsigned count,
 153                   char *verts)
 154 {
 155    struct draw_context *draw = fetch->draw;
 156    struct translate *translate = fetch->translate;
 157    unsigned i;
 158
 159    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 160       translate->set_buffer(translate,
 161                             i,
 162                             ((char *)draw->pt.user.vbuffer[i].map +
 163                              draw->pt.vertex_buffer[i].buffer_offset),
 164                             draw->pt.vertex_buffer[i].stride,
 165                             draw->pt.max_index);
 166    }
 167
 168    translate->run_elts( translate,
 169                         elts,
 170                         count,
 171                         draw->start_instance,
 172                         draw->instance_id,
 173                         verts );
 174 }
 175
 176
 177 void
 178 draw_pt_fetch_run_linear(struct pt_fetch *fetch,
 179                          unsigned start,
 180                          unsigned count,
 181                          char *verts)
 182 {
 183    struct draw_context *draw = fetch->draw;
 184    struct translate *translate = fetch->translate;
 185    unsigned i;
 186
 187    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 188       translate->set_buffer(translate,
 189                             i,
 190                             ((char *)draw->pt.user.vbuffer[i].map +
 191                              draw->pt.vertex_buffer[i].buffer_offset),
 192                             draw->pt.vertex_buffer[i].stride,
 193                             draw->pt.max_index);
 194    }
 195
 196    translate->run( translate,
 197                    start,
 198                    count,
 199                    draw->start_instance,
 200                    draw->instance_id,
 201                    verts );
 202 }
 203
 204
 205 struct pt_fetch *
 206 draw_pt_fetch_create(struct draw_context *draw)
 207 {
 208    struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
 209    if (!fetch)
 210       return NULL;
 211
 212    fetch->draw = draw;
 213    fetch->cache = translate_cache_create();
 214    if (!fetch->cache) {
 215       FREE(fetch);
 216       return NULL;
 217    }
 218
 219    return fetch;
 220 }
 221
 222
 223 void
 224 draw_pt_fetch_destroy(struct pt_fetch *fetch)
 225 {
 226    if (fetch->cache)
 227       translate_cache_destroy(fetch->cache);
 228
 229    FREE(fetch);
 230 }