/*
* Copyright 2010 Marek Olšák <maraeo@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**
* The functions below translate vertex and index buffers to the layout
* compatible with the hardware, so that all vertex and index fetches are
* DWORD-aligned and all used vertex and index formats are supported.
* For indices, an optional index offset is added to each index.
*/
#include "r300_context.h"
#include "translate/translate.h"
#include "util/u_index_modify.h"
/* XXX Optimization: use min_index and translate only that range. */
/* XXX Use the uploader. */
void r300_begin_vertex_translate(struct r300_context *r300,
int min_index, int max_index)
{
struct pipe_context *pipe = &r300->context;
struct translate_key key = {0};
struct translate_element *te;
unsigned tr_elem_index[PIPE_MAX_ATTRIBS] = {0};
struct translate *tr;
struct r300_vertex_element_state *ve = r300->velems;
boolean vb_translated[PIPE_MAX_ATTRIBS] = {0};
void *vb_map[PIPE_MAX_ATTRIBS] = {0}, *out_map;
struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {0}, *out_transfer;
struct pipe_resource *out_buffer;
unsigned i, num_verts;
unsigned slot;
/* Initialize the translate key, i.e. the recipe how vertices should be
* translated. */
for (i = 0; i < ve->count; i++) {
struct pipe_vertex_buffer *vb =
&r300->vertex_buffer[ve->velem[i].vertex_buffer_index];
enum pipe_format output_format = ve->hw_format[i];
unsigned output_format_size = ve->hw_format_size[i];
/* Check for support. */
if (ve->velem[i].src_format == ve->hw_format[i] &&
(vb->buffer_offset + ve->velem[i].src_offset) % 4 == 0 &&
vb->stride % 4 == 0) {
continue;
}
/* Workaround for translate: output floats instead of halfs. */
switch (output_format) {
case PIPE_FORMAT_R16_FLOAT:
output_format = PIPE_FORMAT_R32_FLOAT;
output_format_size = 4;
break;
case PIPE_FORMAT_R16G16_FLOAT:
output_format = PIPE_FORMAT_R32G32_FLOAT;
output_format_size = 8;
break;
case PIPE_FORMAT_R16G16B16_FLOAT:
output_format = PIPE_FORMAT_R32G32B32_FLOAT;
output_format_size = 12;
break;
case PIPE_FORMAT_R16G16B16A16_FLOAT:
output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
output_format_size = 16;
break;
default:;
}
/* Add this vertex element. */
te = &key.element[key.nr_elements];
/*te->type;
te->instance_divisor;*/
te->input_buffer = ve->velem[i].vertex_buffer_index;
te->input_format = ve->velem[i].src_format;
te->input_offset = vb->buffer_offset + ve->velem[i].src_offset;
te->output_format = output_format;
te->output_offset = key.output_stride;
key.output_stride += output_format_size;
vb_translated[ve->velem[i].vertex_buffer_index] = TRUE;
tr_elem_index[i] = key.nr_elements;
key.nr_elements++;
}
/* Get a translate object. */
tr = translate_cache_find(r300->tran.translate_cache, &key);
/* Map buffers we want to translate. */
for (i = 0; i < r300->vertex_buffer_count; i++) {
if (vb_translated[i]) {
struct pipe_vertex_buffer *vb = &r300->vertex_buffer[i];
vb_map[i] = pipe_buffer_map(pipe, vb->buffer,
PIPE_TRANSFER_READ, &vb_transfer[i]);
tr->set_buffer(tr, i, vb_map[i], vb->stride, max_index);
}
}
/* Create and map the output buffer. */
num_verts = max_index + 1;
out_buffer = pipe_buffer_create(&r300->screen->screen,
PIPE_BIND_VERTEX_BUFFER,
key.output_stride * num_verts);
out_map = pipe_buffer_map(pipe, out_buffer, PIPE_TRANSFER_WRITE,
&out_transfer);
/* Translate. */
tr->run(tr, 0, num_verts, 0, out_map);
/* Unmap all buffers. */
for (i = 0; i < r300->vertex_buffer_count; i++) {
if (vb_translated[i]) {
pipe_buffer_unmap(pipe, vb_transfer[i]);
}
}
pipe_buffer_unmap(pipe, out_transfer);
/* Setup the new vertex buffer in the first free slot. */
slot = ~0;
for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
struct pipe_vertex_buffer *vb = &r300->vertex_buffer[i];
if (!vb->buffer) {
pipe_resource_reference(&r300->valid_vertex_buffer[i], out_buffer);
vb->buffer_offset = 0;
vb->stride = key.output_stride;
slot = i;
/* XXX probably need to preserve the real count for u_blitter_save_*. */
r300->vertex_buffer_count = MAX2(r300->vertex_buffer_count, i+1);
r300->validate_buffers = TRUE;
break;
}
}
/* XXX This may fail. */
assert(slot != ~0);
/* Save and replace vertex elements. */
{
struct pipe_vertex_element new_velems[PIPE_MAX_ATTRIBS];
r300->tran.saved_velems = r300->velems;
for (i = 0; i < ve->count; i++) {
if (vb_translated[ve->velem[i].vertex_buffer_index]) {
te = &key.element[tr_elem_index[i]];
new_velems[i].instance_divisor = ve->velem[i].instance_divisor;
new_velems[i].src_format = te->output_format;
new_velems[i].src_offset = te->output_offset;
new_velems[i].vertex_buffer_index = slot;
} else {
memcpy(&new_velems[i], &ve->velem[i],
sizeof(struct pipe_vertex_element));
}
}
r300->tran.new_velems =
pipe->create_vertex_elements_state(pipe, ve->count, new_velems);
pipe->bind_vertex_elements_state(pipe, r300->tran.new_velems);
}
pipe_resource_reference(&out_buffer, NULL);
}
void r300_end_vertex_translate(struct r300_context *r300)
{
struct pipe_context *pipe = &r300->context;
/* Restore vertex elements. */
pipe->bind_vertex_elements_state(pipe, r300->tran.saved_velems);
pipe->delete_vertex_elements_state(pipe, r300->tran.new_velems);
}
/* XXX Use the uploader. */
void r300_translate_index_buffer(struct r300_context *r300,
struct pipe_resource **index_buffer,
unsigned *index_size, unsigned index_offset,
unsigned *start, unsigned count)
{
switch (*index_size) {
case 1:
util_shorten_ubyte_elts(&r300->context, index_buffer, index_offset, *start, count);
*index_size = 2;
*start = 0;
r300->validate_buffers = TRUE;
break;
case 2:
if (index_offset) {
util_rebuild_ushort_elts(&r300->context, index_buffer, index_offset, *start, count);
*start = 0;
r300->validate_buffers = TRUE;
}
break;
case 4:
if (index_offset) {
util_rebuild_uint_elts(&r300->context, index_buffer, index_offset, *start, count);
*start = 0;
r300->validate_buffers = TRUE;
}
break;
}
}