/**********************************************************
* Copyright 2008-2009 VMware, Inc. All rights reserved.
*
* 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 the rights to use, copy,
* modify, merge, publish, distribute, sublicense, 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 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* 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.
*
**********************************************************/
#include "svga_cmd.h"
#include "util/u_inlines.h"
#include "indices/u_indices.h"
#include "svga_hw_reg.h"
#include "svga_draw.h"
#include "svga_draw_private.h"
#include "svga_context.h"
#define DBG 0
static enum pipe_error generate_indices( struct svga_hwtnl *hwtnl,
unsigned nr,
unsigned index_size,
u_generate_func generate,
struct pipe_resource **out_buf )
{
struct pipe_context *pipe = &hwtnl->svga->pipe;
struct pipe_transfer *transfer;
unsigned size = index_size * nr;
struct pipe_resource *dst = NULL;
void *dst_map = NULL;
dst = pipe_buffer_create( pipe->screen,
PIPE_BIND_INDEX_BUFFER,
PIPE_USAGE_STATIC,
size );
if (dst == NULL)
goto fail;
dst_map = pipe_buffer_map( pipe, dst, PIPE_TRANSFER_WRITE,
&transfer);
if (dst_map == NULL)
goto fail;
generate( nr,
dst_map );
pipe_buffer_unmap( pipe, transfer );
*out_buf = dst;
return PIPE_OK;
fail:
if (dst_map)
pipe_buffer_unmap( pipe, transfer );
if (dst)
pipe->screen->resource_destroy( pipe->screen, dst );
return PIPE_ERROR_OUT_OF_MEMORY;
}
static boolean compare( unsigned cached_nr,
unsigned nr,
unsigned type )
{
if (type == U_GENERATE_REUSABLE)
return cached_nr >= nr;
else
return cached_nr == nr;
}
static enum pipe_error retrieve_or_generate_indices( struct svga_hwtnl *hwtnl,
unsigned prim,
unsigned gen_type,
unsigned gen_nr,
unsigned gen_size,
u_generate_func generate,
struct pipe_resource **out_buf )
{
enum pipe_error ret = PIPE_OK;
int i;
for (i = 0; i < IDX_CACHE_MAX; i++) {
if (hwtnl->index_cache[prim][i].buffer != NULL &&
hwtnl->index_cache[prim][i].generate == generate)
{
if (compare(hwtnl->index_cache[prim][i].gen_nr, gen_nr, gen_type))
{
pipe_resource_reference( out_buf,
hwtnl->index_cache[prim][i].buffer );
if (DBG)
debug_printf("%s retrieve %d/%d\n", __FUNCTION__, i, gen_nr);
return PIPE_OK;
}
else if (gen_type == U_GENERATE_REUSABLE)
{
pipe_resource_reference( &hwtnl->index_cache[prim][i].buffer,
NULL );
if (DBG)
debug_printf("%s discard %d/%d\n", __FUNCTION__,
i, hwtnl->index_cache[prim][i].gen_nr);
break;
}
}
}
if (i == IDX_CACHE_MAX)
{
unsigned smallest = 0;
unsigned smallest_size = ~0;
for (i = 0; i < IDX_CACHE_MAX && smallest_size; i++) {
if (hwtnl->index_cache[prim][i].buffer == NULL)
{
smallest = i;
smallest_size = 0;
}
else if (hwtnl->index_cache[prim][i].gen_nr < smallest)
{
smallest = i;
smallest_size = hwtnl->index_cache[prim][i].gen_nr;
}
}
assert (smallest != IDX_CACHE_MAX);
pipe_resource_reference( &hwtnl->index_cache[prim][smallest].buffer,
NULL );
if (DBG)
debug_printf("%s discard smallest %d/%d\n", __FUNCTION__,
smallest, smallest_size);
i = smallest;
}
ret = generate_indices( hwtnl,
gen_nr,
gen_size,
generate,
out_buf );
if (ret != PIPE_OK)
return ret;
hwtnl->index_cache[prim][i].generate = generate;
hwtnl->index_cache[prim][i].gen_nr = gen_nr;
pipe_resource_reference( &hwtnl->index_cache[prim][i].buffer,
*out_buf );
if (DBG)
debug_printf("%s cache %d/%d\n", __FUNCTION__,
i, hwtnl->index_cache[prim][i].gen_nr);
return PIPE_OK;
}
static enum pipe_error
simple_draw_arrays( struct svga_hwtnl *hwtnl,
unsigned prim, unsigned start, unsigned count )
{
SVGA3dPrimitiveRange range;
unsigned hw_prim;
unsigned hw_count;
hw_prim = svga_translate_prim(prim, count, &hw_count);
if (hw_count == 0)
return PIPE_ERROR_BAD_INPUT;
range.primType = hw_prim;
range.primitiveCount = hw_count;
range.indexArray.surfaceId = SVGA3D_INVALID_ID;
range.indexArray.offset = 0;
range.indexArray.stride = 0;
range.indexWidth = 0;
range.indexBias = start;
/* Min/max index should be calculated prior to applying bias, so we
* end up with min_index = 0, max_index = count - 1 and everybody
* looking at those numbers knows to adjust them by
* range.indexBias.
*/
return svga_hwtnl_prim( hwtnl, &range, 0, count - 1, NULL );
}
enum pipe_error
svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl,
unsigned prim,
unsigned start,
unsigned count)
{
unsigned gen_prim, gen_size, gen_nr, gen_type;
u_generate_func gen_func;
enum pipe_error ret = PIPE_OK;
if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL &&
prim >= PIPE_PRIM_TRIANGLES)
{
gen_type = u_unfilled_generator( prim,
start,
count,
hwtnl->api_fillmode,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
else {
gen_type = u_index_generator( svga_hw_prims,
prim,
start,
count,
hwtnl->api_pv,
hwtnl->hw_pv,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
if (gen_type == U_GENERATE_LINEAR) {
return simple_draw_arrays( hwtnl, gen_prim, start, count );
}
else {
struct pipe_resource *gen_buf = NULL;
/* Need to draw as indexed primitive.
* Potentially need to run the gen func to build an index buffer.
*/
ret = retrieve_or_generate_indices( hwtnl,
prim,
gen_type,
gen_nr,
gen_size,
gen_func,
&gen_buf );
if (ret != PIPE_OK)
goto done;
ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
gen_buf,
gen_size,
start,
0,
count - 1,
gen_prim,
0,
gen_nr );
if (ret != PIPE_OK)
goto done;
done:
if (gen_buf)
pipe_resource_reference( &gen_buf, NULL );
return ret;
}
}