/**********************************************************
* 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_format.h"
#include "util/u_helpers.h"
#include "util/u_inlines.h"
#include "util/u_prim.h"
#include "util/u_prim_restart.h"
#include "util/u_upload_mgr.h"
#include "indices/u_indices.h"
#include "svga_hw_reg.h"
#include "svga_cmd.h"
#include "svga_context.h"
#include "svga_screen.h"
#include "svga_draw.h"
#include "svga_shader.h"
#include "svga_state.h"
#include "svga_surface.h"
#include "svga_swtnl.h"
#include "svga_debug.h"
#include "svga_resource_buffer.h"
/* Returns TRUE if we are currently using flat shading.
*/
static boolean
is_using_flat_shading(const struct svga_context *svga)
{
return
svga->state.hw_draw.fs ? svga->state.hw_draw.fs->uses_flat_interp : FALSE;
}
static enum pipe_error
retry_draw_range_elements( struct svga_context *svga,
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,
boolean do_retry )
{
enum pipe_error ret = PIPE_OK;
SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWELEMENTS);
svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
if (ret != PIPE_OK)
goto retry;
/** determine if flatshade is to be used after svga_update_state()
* in case the fragment shader is changed.
*/
svga_hwtnl_set_flatshade(svga->hwtnl,
svga->curr.rast->templ.flatshade ||
is_using_flat_shading(svga),
svga->curr.rast->templ.flatshade_first);
ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
index_buffer, index_size, index_bias,
min_index, max_index,
prim, start, count,
start_instance, instance_count);
if (ret != PIPE_OK)
goto retry;
goto done;
retry:
svga_context_flush( svga, NULL );
if (do_retry)
{
ret = retry_draw_range_elements(svga,
index_buffer, index_size, index_bias,
min_index, max_index,
prim, start, count,
start_instance, instance_count, FALSE);
}
done:
SVGA_STATS_TIME_POP(svga_sws(svga));
return ret;
}
static enum pipe_error
retry_draw_arrays( struct svga_context *svga,
enum pipe_prim_type prim, unsigned start, unsigned count,
unsigned start_instance, unsigned instance_count,
boolean do_retry )
{
enum pipe_error ret;
SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWARRAYS);
svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
if (ret != PIPE_OK)
goto retry;
/** determine if flatshade is to be used after svga_update_state()
* in case the fragment shader is changed.
*/
svga_hwtnl_set_flatshade(svga->hwtnl,
svga->curr.rast->templ.flatshade ||
is_using_flat_shading(svga),
svga->curr.rast->templ.flatshade_first);
ret = svga_hwtnl_draw_arrays(svga->hwtnl, prim, start, count,
start_instance, instance_count);
if (ret != PIPE_OK)
goto retry;
goto done;
retry:
if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
{
svga_context_flush( svga, NULL );
ret = retry_draw_arrays(svga, prim, start, count,
start_instance, instance_count,
FALSE);
}
done:
SVGA_STATS_TIME_POP(svga_sws(svga));
return ret;
}
/**
* Determine if we need to implement primitive restart with a fallback
* path which breaks the original primitive into sub-primitive at the
* restart indexes.
*/
static boolean
need_fallback_prim_restart(const struct svga_context *svga,
const struct pipe_draw_info *info)
{
if (info->primitive_restart && info->index_size) {
if (!svga_have_vgpu10(svga))
return TRUE;
else if (!svga->state.sw.need_swtnl) {
if (info->index_size == 1)
return TRUE; /* no device support for 1-byte indexes */
else if (info->index_size == 2)
return info->restart_index != 0xffff;
else
return info->restart_index != 0xffffffff;
}
}
return FALSE;
}
static void
svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
{
struct svga_context *svga = svga_context( pipe );
enum pipe_prim_type reduced_prim = u_reduced_prim( info->mode );
unsigned count = info->count;
enum pipe_error ret = 0;
boolean needed_swtnl;
struct pipe_resource *indexbuf =
info->has_user_indices ? NULL : info->index.resource;
SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_DRAWVBO);
svga->hud.num_draw_calls++; /* for SVGA_QUERY_NUM_DRAW_CALLS */
if (u_reduced_prim(info->mode) == PIPE_PRIM_TRIANGLES &&
svga->curr.rast->templ.cull_face == PIPE_FACE_FRONT_AND_BACK)
goto done;
/* Upload a user index buffer. */
unsigned index_offset = 0;
if (info->index_size && info->has_user_indices &&
!util_upload_index_buffer(pipe, info, &indexbuf, &index_offset)) {
goto done;
}
/*
* Mark currently bound target surfaces as dirty
* doesn't really matter if it is done before drawing.
*
* TODO If we ever normaly return something other then
* true we should not mark it as dirty then.
*/
svga_mark_surfaces_dirty(svga_context(pipe));
if (svga->curr.reduced_prim != reduced_prim) {
svga->curr.reduced_prim = reduced_prim;
svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
}
if (need_fallback_prim_restart(svga, info)) {
enum pipe_error r;
r = util_draw_vbo_without_prim_restart(pipe, info);
assert(r == PIPE_OK);
(void) r;
goto done;
}
if (!u_trim_pipe_prim( info->mode, &count ))
goto done;
needed_swtnl = svga->state.sw.need_swtnl;
svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
if (svga->state.sw.need_swtnl) {
svga->hud.num_fallbacks++; /* for SVGA_QUERY_NUM_FALLBACKS */
if (!needed_swtnl) {
/*
* We're switching from HW to SW TNL. SW TNL will require mapping all
* currently bound vertex buffers, some of which may already be
* referenced in the current command buffer as result of previous HW
* TNL. So flush now, to prevent the context to flush while a referred
* vertex buffer is mapped.
*/
svga_context_flush(svga, NULL);
}
/* Avoid leaking the previous hwtnl bias to swtnl */
svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
ret = svga_swtnl_draw_vbo(svga, info, indexbuf, index_offset);
}
else {
if (info->index_size && indexbuf) {
unsigned offset;
assert(index_offset % info->index_size == 0);
offset = index_offset / info->index_size;
ret = retry_draw_range_elements( svga,
indexbuf,
info->index_size,
info->index_bias,
info->min_index,
info->max_index,
info->mode,
info->start + offset,
count,
info->start_instance,
info->instance_count,
TRUE );
}
else {
ret = retry_draw_arrays(svga, info->mode, info->start, count,
info->start_instance, info->instance_count,
TRUE);
}
}
/* XXX: Silence warnings, do something sensible here? */
(void)ret;
if (SVGA_DEBUG & DEBUG_FLUSH) {
svga_hwtnl_flush_retry( svga );
svga_context_flush(svga, NULL);
}
done:
if (info->index_size && info->index.resource != indexbuf)
pipe_resource_reference(&indexbuf, NULL);
SVGA_STATS_TIME_POP(svga_sws(svga));
}
void svga_init_draw_functions( struct svga_context *svga )
{
svga->pipe.draw_vbo = svga_draw_vbo;
}