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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_prim.h"
#include "indices/u_indices.h"
#include "svga_cmd.h"
#include "svga_draw.h"
#include "svga_draw_private.h"
#include "svga_resource_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_resource *src,
unsigned offset, unsigned prim, unsigned nr,
unsigned index_size,
u_translate_func translate, struct pipe_resource **out_buf)
{
struct pipe_context *pipe = &hwtnl->svga->pipe;
struct pipe_transfer *src_transfer = NULL;
struct pipe_transfer *dst_transfer = NULL;
unsigned size;
const void *src_map = NULL;
struct pipe_resource *dst = NULL;
void *dst_map = NULL;
/* Need to trim vertex count to make sure we don't write too much data
* to the dst buffer in the translate() call.
*/
u_trim_pipe_prim(prim, &nr);
size = index_size * nr;
dst = pipe_buffer_create(pipe->screen,
PIPE_BIND_INDEX_BUFFER, PIPE_USAGE_DEFAULT, size);
if (dst == NULL)
goto fail;
src_map = pipe_buffer_map(pipe, src, PIPE_TRANSFER_READ, &src_transfer);
if (src_map == NULL)
goto fail;
dst_map = pipe_buffer_map(pipe, dst, PIPE_TRANSFER_WRITE, &dst_transfer);
if (dst_map == NULL)
goto fail;
translate((const char *) src_map + offset, 0, 0, nr, 0, dst_map);
pipe_buffer_unmap(pipe, src_transfer);
pipe_buffer_unmap(pipe, dst_transfer);
*out_buf = dst;
return PIPE_OK;
fail:
if (src_map)
pipe_buffer_unmap(pipe, src_transfer);
if (dst_map)
pipe_buffer_unmap(pipe, dst_transfer);
if (dst)
pipe->screen->resource_destroy(pipe->screen, dst);
return PIPE_ERROR_OUT_OF_MEMORY;
}
enum pipe_error
svga_hwtnl_simple_draw_range_elements(struct svga_hwtnl *hwtnl,
struct pipe_resource *index_buffer,
unsigned index_size, int index_bias,
unsigned min_index, unsigned max_index,
unsigned prim, unsigned start,
unsigned count)
{
SVGA3dPrimitiveRange range;
unsigned hw_prim;
unsigned hw_count;
unsigned index_offset = start * index_size;
hw_prim = svga_translate_prim(prim, count, &hw_count);
if (hw_count == 0)
return PIPE_OK; /* nothing to draw */
/* We should never see user-space buffers in the driver. The vbuf
* module should have converted them into real buffers.
*/
if (index_buffer)
assert(!svga_buffer_is_user_buffer(index_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 = index_bias;
return svga_hwtnl_prim(hwtnl, &range, min_index, max_index, index_buffer);
}
enum pipe_error
svga_hwtnl_draw_range_elements(struct svga_hwtnl *hwtnl,
struct pipe_resource *index_buffer,
unsigned index_size, int index_bias,
unsigned min_index, unsigned max_index,
unsigned prim, unsigned start, unsigned count)
{
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,
PR_DISABLE,
&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,
index_bias,
min_index,
max_index,
gen_prim, start, count);
}
else {
struct pipe_resource *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_prim, 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,
index_bias,
min_index,
max_index,
gen_prim, 0, gen_nr);
if (ret != PIPE_OK)
goto done;
done:
if (gen_buf)
pipe_resource_reference(&gen_buf, NULL);
return ret;
}
}
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