src/gallium/drivers/r600/r600_translate.c

   1 /*
   2  * Copyright 2010 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors: Dave Airlie <airlied@redhat.com>
  24  */
  25 #include "translate/translate_cache.h"
  26 #include "translate/translate.h"
  27 #include <pipebuffer/pb_buffer.h>
  28 #include <util/u_index_modify.h>
  29 #include "r600_pipe.h"
  30
  31 void r600_begin_vertex_translate(struct r600_pipe_context *rctx)
  32 {
  33         struct pipe_context *pipe = &rctx->context;
  34         struct translate_key key = {0};
  35         struct translate_element *te;
  36         unsigned tr_elem_index[PIPE_MAX_ATTRIBS] = {0};
  37         struct translate *tr;
  38         struct r600_vertex_element *ve = rctx->vertex_elements;
  39         boolean vb_translated[PIPE_MAX_ATTRIBS] = {0};
  40         void *vb_map[PIPE_MAX_ATTRIBS] = {0}, *out_map;
  41         struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {0}, *out_transfer;
  42         struct pipe_resource *out_buffer;
  43         unsigned i, num_verts;
  44
  45         /* Initialize the translate key, i.e. the recipe how vertices should be
  46          * translated. */
  47         for (i = 0; i < ve->count; i++) {
  48                 struct pipe_vertex_buffer *vb =
  49                         &rctx->vertex_buffer[ve->elements[i].vertex_buffer_index];
  50                 enum pipe_format output_format = ve->hw_format[i];
  51                 unsigned output_format_size = ve->hw_format_size[i];
  52
  53                 /* Check for support. */
  54                 if (ve->elements[i].src_format == ve->hw_format[i] &&
  55                     (vb->buffer_offset + ve->elements[i].src_offset) % 4 == 0 &&
  56                     vb->stride % 4 == 0) {
  57                         continue;
  58                 }
  59
  60                 /* Workaround for translate: output floats instead of halfs. */
  61                 switch (output_format) {
  62                 case PIPE_FORMAT_R16_FLOAT:
  63                         output_format = PIPE_FORMAT_R32_FLOAT;
  64                         output_format_size = 4;
  65                         break;
  66                 case PIPE_FORMAT_R16G16_FLOAT:
  67                         output_format = PIPE_FORMAT_R32G32_FLOAT;
  68                         output_format_size = 8;
  69                         break;
  70                 case PIPE_FORMAT_R16G16B16_FLOAT:
  71                         output_format = PIPE_FORMAT_R32G32B32_FLOAT;
  72                         output_format_size = 12;
  73                         break;
  74                 case PIPE_FORMAT_R16G16B16A16_FLOAT:
  75                         output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  76                         output_format_size = 16;
  77                         break;
  78                 default:;
  79                 }
  80
  81                 /* Add this vertex element. */
  82                 te = &key.element[key.nr_elements];
  83                 /*te->type;
  84                   te->instance_divisor;*/
  85                 te->input_buffer = ve->elements[i].vertex_buffer_index;
  86                 te->input_format = ve->elements[i].src_format;
  87                 te->input_offset = vb->buffer_offset + ve->elements[i].src_offset;
  88                 te->output_format = output_format;
  89                 te->output_offset = key.output_stride;
  90
  91                 key.output_stride += output_format_size;
  92                 vb_translated[ve->elements[i].vertex_buffer_index] = TRUE;
  93                 tr_elem_index[i] = key.nr_elements;
  94                 key.nr_elements++;
  95         }
  96
  97         /* Get a translate object. */
  98         tr = translate_cache_find(rctx->tran.translate_cache, &key);
  99
 100         /* Map buffers we want to translate. */
 101         for (i = 0; i < rctx->nvertex_buffer; i++) {
 102                 if (vb_translated[i]) {
 103                         struct pipe_vertex_buffer *vb = &rctx->vertex_buffer[i];
 104
 105                         vb_map[i] = pipe_buffer_map(pipe, vb->buffer,
 106                                                     PIPE_TRANSFER_READ, &vb_transfer[i]);
 107
 108                         tr->set_buffer(tr, i, vb_map[i], vb->stride, vb->max_index);
 109                 }
 110         }
 111
 112         /* Create and map the output buffer. */
 113         num_verts = rctx->vb_max_index + 1;
 114
 115         out_buffer = pipe_buffer_create(&rctx->screen->screen,
 116                                         PIPE_BIND_VERTEX_BUFFER,
 117                                         key.output_stride * num_verts);
 118
 119         out_map = pipe_buffer_map(pipe, out_buffer, PIPE_TRANSFER_WRITE,
 120                                   &out_transfer);
 121
 122         /* Translate. */
 123         tr->run(tr, 0, num_verts, 0, out_map);
 124
 125         /* Unmap all buffers. */
 126         for (i = 0; i < rctx->nvertex_buffer; i++) {
 127                 if (vb_translated[i]) {
 128                         pipe_buffer_unmap(pipe, rctx->vertex_buffer[i].buffer,
 129                                           vb_transfer[i]);
 130                 }
 131         }
 132
 133         pipe_buffer_unmap(pipe, out_buffer, out_transfer);
 134
 135         /* Setup the new vertex buffer in the first free slot. */
 136         for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
 137                 struct pipe_vertex_buffer *vb = &rctx->vertex_buffer[i];
 138
 139                 if (!vb->buffer) {
 140                         pipe_resource_reference(&vb->buffer, out_buffer);
 141                         vb->buffer_offset = 0;
 142                         vb->max_index = num_verts - 1;
 143                         vb->stride = key.output_stride;
 144                         rctx->tran.vb_slot = i;
 145                         break;
 146                 }
 147         }
 148
 149         /* Save and replace vertex elements. */
 150         {
 151                 struct pipe_vertex_element new_velems[PIPE_MAX_ATTRIBS];
 152
 153                 rctx->tran.saved_velems = rctx->vertex_elements;
 154
 155                 for (i = 0; i < ve->count; i++) {
 156                         if (vb_translated[ve->elements[i].vertex_buffer_index]) {
 157                                 te = &key.element[tr_elem_index[i]];
 158                                 new_velems[i].instance_divisor = ve->elements[i].instance_divisor;
 159                                 new_velems[i].src_format = te->output_format;
 160                                 new_velems[i].src_offset = te->output_offset;
 161                                 new_velems[i].vertex_buffer_index = rctx->tran.vb_slot;
 162                         } else {
 163                                 memcpy(&new_velems[i], &ve->elements[i],
 164                                        sizeof(struct pipe_vertex_element));
 165                         }
 166                 }
 167
 168                 rctx->tran.new_velems =
 169                         pipe->create_vertex_elements_state(pipe, ve->count, new_velems);
 170                 pipe->bind_vertex_elements_state(pipe, rctx->tran.new_velems);
 171         }
 172
 173         pipe_resource_reference(&out_buffer, NULL);
 174 }
 175
 176 void r600_end_vertex_translate(struct r600_pipe_context *rctx)
 177 {
 178         struct pipe_context *pipe = &rctx->context;
 179
 180         /* Restore vertex elements. */
 181         pipe->bind_vertex_elements_state(pipe, rctx->tran.saved_velems);
 182         pipe->delete_vertex_elements_state(pipe, rctx->tran.new_velems);
 183
 184         /* Delete the now-unused VBO. */
 185         pipe_resource_reference(&rctx->vertex_buffer[rctx->tran.vb_slot].buffer,
 186                                 NULL);
 187 }
 188
 189 void r600_translate_index_buffer(struct r600_pipe_context *r600,
 190                                         struct pipe_resource **index_buffer,
 191                                         unsigned *index_size,
 192                                         unsigned *start, unsigned count)
 193 {
 194         switch (*index_size) {
 195         case 1:
 196                 util_shorten_ubyte_elts(&r600->context, index_buffer, 0, *start, count);
 197                 *index_size = 2;
 198                 *start = 0;
 199                 break;
 200
 201         case 2:
 202                 if (*start % 2 != 0) {
 203                         util_rebuild_ushort_elts(&r600->context, index_buffer, 0, *start, count);
 204                         *start = 0;
 205                 }
 206                 break;
 207
 208         case 4:
 209                 break;
 210         }
 211 }