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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 "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_resource_buffer.h"
#include "svga_winsys.h"
#include "svga_context.h"
#include "svga_hw_reg.h"
/**
* Return a new index buffer which contains a translation of the original
* index buffer. An example of a translation is converting from QUAD
* primitives to TRIANGLE primitives. Each set of four indexes for a quad
* will be converted to six indices for two triangles.
*
* Before generating the new index buffer we'll check if the incoming
* buffer already has a translated buffer that can be re-used.
* This benefits demos like Cinebench R15 which has many
* glDrawElements(GL_QUADS) commands (we can't draw quads natively).
*
* \param offset offset in bytes to first index to translate in src buffer
* \param orig_prim original primitive type (like PIPE_PRIM_QUADS)
* \param gen_prim new/generated primitive type (like PIPE_PRIM_TRIANGLES)
* \param orig_nr number of indexes to translate in source buffer
* \param gen_nr number of indexes to write into new/dest buffer
* \param index_size bytes per index (2 or 4)
* \param translate the translation function from the u_translate module
* \param out_buf returns the new/translated index buffer
* \return error code to indicate success failure
*/
static enum pipe_error
translate_indices(struct svga_hwtnl *hwtnl, struct pipe_resource *src,
unsigned offset,
enum pipe_prim_type orig_prim, enum pipe_prim_type gen_prim,
unsigned orig_nr, unsigned gen_nr,
unsigned index_size,
u_translate_func translate, struct pipe_resource **out_buf)
{
struct pipe_context *pipe = &hwtnl->svga->pipe;
struct svga_screen *screen = svga_screen(pipe->screen);
struct svga_buffer *src_sbuf = svga_buffer(src);
struct pipe_transfer *src_transfer = NULL;
struct pipe_transfer *dst_transfer = NULL;
unsigned size = index_size * gen_nr;
const void *src_map = NULL;
struct pipe_resource *dst = NULL;
void *dst_map = NULL;
assert(index_size == 2 || index_size == 4);
if (!screen->debug.no_cache_index_buffers) {
/* Check if we already have a translated index buffer */
if (src_sbuf->translated_indices.buffer &&
src_sbuf->translated_indices.orig_prim == orig_prim &&
src_sbuf->translated_indices.new_prim == gen_prim &&
src_sbuf->translated_indices.offset == offset &&
src_sbuf->translated_indices.count == orig_nr &&
src_sbuf->translated_indices.index_size == index_size) {
pipe_resource_reference(out_buf, src_sbuf->translated_indices.buffer);
return PIPE_OK;
}
}
/* 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(gen_prim, &gen_nr);
size = index_size * gen_nr;
dst = pipe_buffer_create(pipe->screen,
PIPE_BIND_INDEX_BUFFER, PIPE_USAGE_DEFAULT, size);
if (!dst)
goto fail;
src_map = pipe_buffer_map(pipe, src, PIPE_TRANSFER_READ, &src_transfer);
if (!src_map)
goto fail;
dst_map = pipe_buffer_map(pipe, dst, PIPE_TRANSFER_WRITE, &dst_transfer);
if (!dst_map)
goto fail;
translate((const char *) src_map + offset, 0, 0, gen_nr, 0, dst_map);
pipe_buffer_unmap(pipe, src_transfer);
pipe_buffer_unmap(pipe, dst_transfer);
*out_buf = dst;
if (!screen->debug.no_cache_index_buffers) {
/* Save the new, translated index buffer in the hope we can use it
* again in the future.
*/
pipe_resource_reference(&src_sbuf->translated_indices.buffer, dst);
src_sbuf->translated_indices.orig_prim = orig_prim;
src_sbuf->translated_indices.new_prim = gen_prim;
src_sbuf->translated_indices.offset = offset;
src_sbuf->translated_indices.count = orig_nr;
src_sbuf->translated_indices.index_size = index_size;
}
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,
enum pipe_prim_type prim, unsigned start,
unsigned count,
unsigned start_instance,
unsigned instance_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 */
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, count,
min_index, max_index, index_buffer,
start_instance, instance_count);
}
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,
enum pipe_prim_type prim, unsigned start, unsigned count,
unsigned start_instance, unsigned instance_count)
{
enum pipe_prim_type gen_prim;
unsigned gen_size, gen_nr;
enum indices_mode gen_type;
u_translate_func gen_func;
enum pipe_error ret = PIPE_OK;
SVGA_STATS_TIME_PUSH(svga_sws(hwtnl->svga),
SVGA_STATS_TIME_HWTNLDRAWELEMENTS);
if (svga_need_unfilled_fallback(hwtnl, prim)) {
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:
*/
ret = svga_hwtnl_simple_draw_range_elements(hwtnl, index_buffer,
index_size,
index_bias,
min_index,
max_index,
gen_prim, start, count,
start_instance,
instance_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,
prim, gen_prim,
count, 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,
start_instance,
instance_count);
done:
if (gen_buf)
pipe_resource_reference(&gen_buf, NULL);
}
SVGA_STATS_TIME_POP(svga_sws(hwtnl->svga));
return ret;
}
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