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/format/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,
  75     * clip[] and whatever else in the header untouched.
  76     */
  77    dst_offset = offsetof(struct vertex_header, data);
  78
  79    if (instance_id_index != ~0) {
  80       num_extra_inputs++;
  81    }
  82
  83    assert(draw->pt.nr_vertex_elements + num_extra_inputs >= vs_input_count);
  84
  85    nr_inputs = MIN2(vs_input_count, draw->pt.nr_vertex_elements + num_extra_inputs);
  86
  87    for (i = 0; i < nr_inputs; i++) {
  88       if (i == instance_id_index) {
  89          key.element[nr].type = TRANSLATE_ELEMENT_INSTANCE_ID;
  90          key.element[nr].input_format = PIPE_FORMAT_R32_USCALED;
  91          key.element[nr].output_format = PIPE_FORMAT_R32_USCALED;
  92          key.element[nr].output_offset = dst_offset;
  93
  94          dst_offset += sizeof(uint);
  95       } else if (util_format_is_pure_sint(draw->pt.vertex_element[i].src_format)) {
  96          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
  97          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
  98          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
  99          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 100          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 101          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_SINT;
 102          key.element[nr].output_offset = dst_offset;
 103
 104          ei++;
 105          dst_offset += 4 * sizeof(int);
 106       } else if (util_format_is_pure_uint(draw->pt.vertex_element[i].src_format)) {
 107          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
 108          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 109          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 110          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 111          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 112          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_UINT;
 113          key.element[nr].output_offset = dst_offset;
 114
 115          ei++;
 116          dst_offset += 4 * sizeof(unsigned);
 117       } else {
 118          key.element[nr].type = TRANSLATE_ELEMENT_NORMAL;
 119          key.element[nr].input_format = draw->pt.vertex_element[ei].src_format;
 120          key.element[nr].input_buffer = draw->pt.vertex_element[ei].vertex_buffer_index;
 121          key.element[nr].input_offset = draw->pt.vertex_element[ei].src_offset;
 122          key.element[nr].instance_divisor = draw->pt.vertex_element[ei].instance_divisor;
 123          key.element[nr].output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 124          key.element[nr].output_offset = dst_offset;
 125
 126          ei++;
 127          dst_offset += 4 * sizeof(float);
 128       }
 129
 130       nr++;
 131    }
 132
 133    assert(dst_offset <= vertex_size);
 134
 135    key.nr_elements = nr;
 136    key.output_stride = vertex_size;
 137
 138    if (!fetch->translate ||
 139        translate_key_compare(&fetch->translate->key, &key) != 0)
 140    {
 141       translate_key_sanitize(&key);
 142       fetch->translate = translate_cache_find(fetch->cache, &key);
 143    }
 144 }
 145
 146
 147 void
 148 draw_pt_fetch_run(struct pt_fetch *fetch,
 149                   const unsigned *elts,
 150                   unsigned count,
 151                   char *verts)
 152 {
 153    struct draw_context *draw = fetch->draw;
 154    struct translate *translate = fetch->translate;
 155    unsigned i;
 156
 157    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 158       translate->set_buffer(translate,
 159                             i,
 160                             ((char *)draw->pt.user.vbuffer[i].map +
 161                              draw->pt.vertex_buffer[i].buffer_offset),
 162                             draw->pt.vertex_buffer[i].stride,
 163                             draw->pt.max_index);
 164    }
 165
 166    translate->run_elts( translate,
 167                         elts,
 168                         count,
 169                         draw->start_instance,
 170                         draw->instance_id,
 171                         verts );
 172 }
 173
 174
 175 void
 176 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].map +
 189                              draw->pt.vertex_buffer[i].buffer_offset),
 190                             draw->pt.vertex_buffer[i].stride,
 191                             draw->pt.max_index);
 192    }
 193
 194    translate->run( translate,
 195                    start,
 196                    count,
 197                    draw->start_instance,
 198                    draw->instance_id,
 199                    verts );
 200 }
 201
 202
 203 struct pt_fetch *
 204 draw_pt_fetch_create(struct draw_context *draw)
 205 {
 206    struct pt_fetch *fetch = CALLOC_STRUCT(pt_fetch);
 207    if (!fetch)
 208       return NULL;
 209
 210    fetch->draw = draw;
 211    fetch->cache = translate_cache_create();
 212    if (!fetch->cache) {
 213       FREE(fetch);
 214       return NULL;
 215    }
 216
 217    return fetch;
 218 }
 219
 220
 221 void
 222 draw_pt_fetch_destroy(struct pt_fetch *fetch)
 223 {
 224    if (fetch->cache)
 225       translate_cache_destroy(fetch->cache);
 226
 227    FREE(fetch);
 228 }