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/**********************************************************
* 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 "util/u_inlines.h"
#include "util/u_upload_mgr.h"
#include "indices/u_indices.h"
#include "svga_cmd.h"
#include "svga_draw.h"
#include "svga_draw_private.h"
#include "svga_screen_buffer.h"
#include "svga_winsys.h"
#include "svga_context.h"
#include "svga_hw_reg.h"
static enum pipe_error
translate_indices( struct svga_hwtnl *hwtnl,
struct pipe_buffer *src,
unsigned offset,
unsigned nr,
unsigned index_size,
u_translate_func translate,
struct pipe_buffer **out_buf )
{
struct pipe_screen *screen = hwtnl->svga->pipe.screen;
unsigned size = index_size * nr;
const void *src_map = NULL;
struct pipe_buffer *dst = NULL;
void *dst_map = NULL;
dst = screen->buffer_create( screen, 32,
PIPE_BUFFER_USAGE_INDEX |
PIPE_BUFFER_USAGE_CPU_WRITE |
PIPE_BUFFER_USAGE_GPU_READ,
size );
if (dst == NULL)
goto fail;
src_map = pipe_buffer_map( screen, src, PIPE_BUFFER_USAGE_CPU_READ );
if (src_map == NULL)
goto fail;
dst_map = pipe_buffer_map( screen, dst, PIPE_BUFFER_USAGE_CPU_WRITE );
if (dst_map == NULL)
goto fail;
translate( (const char *)src_map + offset,
nr,
dst_map );
pipe_buffer_unmap( screen, src );
pipe_buffer_unmap( screen, dst );
*out_buf = dst;
return PIPE_OK;
fail:
if (src_map)
screen->buffer_unmap( screen, src );
if (dst_map)
screen->buffer_unmap( screen, dst );
if (dst)
screen->buffer_destroy( dst );
return PIPE_ERROR_OUT_OF_MEMORY;
}
enum pipe_error
svga_hwtnl_simple_draw_range_elements( struct svga_hwtnl *hwtnl,
struct pipe_buffer *index_buffer,
unsigned index_size,
unsigned min_index,
unsigned max_index,
unsigned prim,
unsigned start,
unsigned count,
unsigned bias )
{
struct pipe_buffer *upload_buffer = NULL;
SVGA3dPrimitiveRange range;
unsigned hw_prim;
unsigned hw_count;
unsigned index_offset = start * index_size;
int ret = PIPE_OK;
hw_prim = svga_translate_prim(prim, count, &hw_count);
if (hw_count == 0)
goto done;
if (index_buffer &&
svga_buffer_is_user_buffer(index_buffer))
{
assert( index_buffer->size >= index_offset + count * index_size );
ret = u_upload_buffer( hwtnl->upload_ib,
index_offset,
count * index_size,
index_buffer,
&index_offset,
&upload_buffer );
if (ret)
goto done;
/* Don't need to worry about refcounting index_buffer as this is
* just a stack variable without a counted reference of its own.
* The caller holds the reference.
*/
index_buffer = upload_buffer;
}
range.primType = hw_prim;
range.primitiveCount = hw_count;
range.indexArray.offset = index_offset;
range.indexArray.stride = index_size;
range.indexWidth = index_size;
range.indexBias = bias;
ret = svga_hwtnl_prim( hwtnl, &range, min_index, max_index, index_buffer );
if (ret)
goto done;
done:
if (upload_buffer)
pipe_buffer_reference( &upload_buffer, NULL );
return ret;
}
enum pipe_error
svga_hwtnl_draw_range_elements( struct svga_hwtnl *hwtnl,
struct pipe_buffer *index_buffer,
unsigned index_size,
unsigned min_index,
unsigned max_index,
unsigned prim, unsigned start, unsigned count,
unsigned bias)
{
unsigned gen_prim, gen_size, gen_nr, gen_type;
u_translate_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_translator( prim,
index_size,
count,
hwtnl->api_fillmode,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
else
{
gen_type = u_index_translator( svga_hw_prims,
prim,
index_size,
count,
hwtnl->api_pv,
hwtnl->hw_pv,
&gen_prim,
&gen_size,
&gen_nr,
&gen_func );
}
if (gen_type == U_TRANSLATE_MEMCPY) {
/* No need for translation, just pass through to hardware:
*/
return svga_hwtnl_simple_draw_range_elements( hwtnl, index_buffer,
index_size,
min_index,
max_index,
gen_prim, start, count, bias );
}
else {
struct pipe_buffer *gen_buf = NULL;
/* Need to allocate a new index buffer and run the translate
* func to populate it. Could potentially cache this translated
* index buffer with the original to avoid future
* re-translations. Not much point if we're just accelerating
* GL though, as index buffers are typically used only once
* there.
*/
ret = translate_indices( hwtnl,
index_buffer,
start * index_size,
gen_nr,
gen_size,
gen_func,
&gen_buf );
if (ret)
goto done;
ret = svga_hwtnl_simple_draw_range_elements( hwtnl,
gen_buf,
gen_size,
min_index,
max_index,
gen_prim,
0,
gen_nr,
bias );
if (ret)
goto done;
done:
if (gen_buf)
pipe_buffer_reference( &gen_buf, NULL );
return ret;
}
}
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