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         struct pipe_vertex_element new_velems[PIPE_MAX_ATTRIBS];
  45
  46         /* Initialize the translate key, i.e. the recipe how vertices should be
  47          * translated. */
  48         for (i = 0; i < ve->count; i++) {
  49                 struct pipe_vertex_buffer *vb =
  50                         &rctx->vertex_buffer[ve->elements[i].vertex_buffer_index];
  51                 enum pipe_format output_format = ve->hw_format[i];
  52                 unsigned output_format_size = ve->hw_format_size[i];
  53
  54                 /* Check for support. */
  55                 if (ve->elements[i].src_format == ve->hw_format[i]) {
  56                         continue;
  57                 }
  58
  59                 /* Workaround for translate: output floats instead of halfs. */
  60                 switch (output_format) {
  61                 case PIPE_FORMAT_R16_FLOAT:
  62                         output_format = PIPE_FORMAT_R32_FLOAT;
  63                         output_format_size = 4;
  64                         break;
  65                 case PIPE_FORMAT_R16G16_FLOAT:
  66                         output_format = PIPE_FORMAT_R32G32_FLOAT;
  67                         output_format_size = 8;
  68                         break;
  69                 case PIPE_FORMAT_R16G16B16_FLOAT:
  70                         output_format = PIPE_FORMAT_R32G32B32_FLOAT;
  71                         output_format_size = 12;
  72                         break;
  73                 case PIPE_FORMAT_R16G16B16A16_FLOAT:
  74                         output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  75                         output_format_size = 16;
  76                         break;
  77                 default:;
  78                 }
  79
  80                 /* Add this vertex element. */
  81                 te = &key.element[key.nr_elements];
  82                 /*te->type;
  83                   te->instance_divisor;*/
  84                 te->input_buffer = ve->elements[i].vertex_buffer_index;
  85                 te->input_format = ve->elements[i].src_format;
  86                 te->input_offset = vb->buffer_offset + ve->elements[i].src_offset;
  87                 te->output_format = output_format;
  88                 te->output_offset = key.output_stride;
  89
  90                 key.output_stride += output_format_size;
  91                 vb_translated[ve->elements[i].vertex_buffer_index] = TRUE;
  92                 tr_elem_index[i] = key.nr_elements;
  93                 key.nr_elements++;
  94         }
  95
  96         /* Get a translate object. */
  97         tr = translate_cache_find(rctx->tran.translate_cache, &key);
  98
  99         /* Map buffers we want to translate. */
 100         for (i = 0; i < rctx->nvertex_buffer; i++) {
 101                 if (vb_translated[i]) {
 102                         struct pipe_vertex_buffer *vb = &rctx->vertex_buffer[i];
 103
 104                         vb_map[i] = pipe_buffer_map(pipe, vb->buffer,
 105                                                     PIPE_TRANSFER_READ, &vb_transfer[i]);
 106
 107                         tr->set_buffer(tr, i, vb_map[i], vb->stride, vb->max_index);
 108                 }
 109         }
 110
 111         /* Create and map the output buffer. */
 112         num_verts = rctx->vb_max_index + 1;
 113
 114         out_buffer = pipe_buffer_create(&rctx->screen->screen,
 115                                         PIPE_BIND_VERTEX_BUFFER,
 116                                         key.output_stride * num_verts);
 117
 118         out_map = pipe_buffer_map(pipe, out_buffer, PIPE_TRANSFER_WRITE,
 119                                   &out_transfer);
 120
 121         /* Translate. */
 122         tr->run(tr, 0, num_verts, 0, out_map);
 123
 124         /* Unmap all buffers. */
 125         for (i = 0; i < rctx->nvertex_buffer; i++) {
 126                 if (vb_translated[i]) {
 127                         pipe_buffer_unmap(pipe, rctx->vertex_buffer[i].buffer,
 128                                           vb_transfer[i]);
 129                 }
 130         }
 131
 132         pipe_buffer_unmap(pipe, out_buffer, out_transfer);
 133
 134         /* Setup the new vertex buffer in the first free slot. */
 135         for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
 136                 struct pipe_vertex_buffer *vb = &rctx->vertex_buffer[i];
 137
 138                 if (!vb->buffer) {
 139                         pipe_resource_reference(&vb->buffer, out_buffer);
 140                         vb->buffer_offset = 0;
 141                         vb->max_index = num_verts - 1;
 142                         vb->stride = key.output_stride;
 143                         rctx->tran.vb_slot = i;
 144                         break;
 145                 }
 146         }
 147
 148         /* Save and replace vertex elements. */
 149         for (i = 0; i < ve->count; i++) {
 150                 if (vb_translated[ve->elements[i].vertex_buffer_index]) {
 151                         te = &key.element[tr_elem_index[i]];
 152                         new_velems[i].instance_divisor = ve->elements[i].instance_divisor;
 153                         new_velems[i].src_format = te->output_format;
 154                         new_velems[i].src_offset = te->output_offset;
 155                         new_velems[i].vertex_buffer_index = rctx->tran.vb_slot;
 156                 } else {
 157                         memcpy(&new_velems[i], &ve->elements[i],
 158                                         sizeof(struct pipe_vertex_element));
 159                 }
 160         }
 161
 162         rctx->tran.new_velems = pipe->create_vertex_elements_state(pipe, ve->count, new_velems);
 163         pipe->bind_vertex_elements_state(pipe, rctx->tran.new_velems);
 164
 165         pipe_resource_reference(&out_buffer, NULL);
 166 }
 167
 168 void r600_end_vertex_translate(struct r600_pipe_context *rctx)
 169 {
 170         struct pipe_context *pipe = &rctx->context;
 171
 172         if (rctx->tran.new_velems == NULL) {
 173                 return;
 174         }
 175         /* Restore vertex elements. */
 176         if (rctx->vertex_elements == rctx->tran.new_velems) {
 177                 pipe->bind_vertex_elements_state(pipe, NULL);
 178         }
 179         pipe->delete_vertex_elements_state(pipe, rctx->tran.new_velems);
 180         rctx->tran.new_velems = NULL;
 181
 182         /* Delete the now-unused VBO. */
 183         pipe_resource_reference(&rctx->vertex_buffer[rctx->tran.vb_slot].buffer,
 184                                 NULL);
 185 }
 186
 187 void r600_translate_index_buffer(struct r600_pipe_context *r600,
 188                                         struct pipe_resource **index_buffer,
 189                                         unsigned *index_size,
 190                                         unsigned *start, unsigned count)
 191 {
 192         switch (*index_size) {
 193         case 1:
 194                 util_shorten_ubyte_elts(&r600->context, index_buffer, 0, *start, count);
 195                 *index_size = 2;
 196                 *start = 0;
 197                 break;
 198         case 2:
 199         case 4:
 200                 break;
 201         }
 202 }