/**********************************************************
* 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_debug.h"
#include "pipe/p_defines.h"
#include "util/u_memory.h"
#include "draw/draw_context.h"
#include "svga_context.h"
#include "svga_screen.h"
#include "svga_state.h"
#include "svga_draw.h"
#include "svga_cmd.h"
#include "svga_hw_reg.h"
/* This is just enough to decide whether we need to use the draw
* module (swtnl) or not.
*/
static const struct svga_tracked_state *need_swtnl_state[] =
{
&svga_update_need_swvfetch,
&svga_update_need_pipeline,
&svga_update_need_swtnl,
NULL
};
/* Atoms to update hardware state prior to emitting a clear or draw
* packet.
*/
static const struct svga_tracked_state *hw_clear_state[] =
{
&svga_hw_scissor,
&svga_hw_viewport,
&svga_hw_framebuffer,
NULL
};
/* Atoms to update hardware state prior to emitting a draw packet.
*/
static const struct svga_tracked_state *hw_draw_state[] =
{
&svga_hw_fs,
&svga_hw_vs,
&svga_hw_rss,
&svga_hw_tss,
&svga_hw_tss_binding,
&svga_hw_clip_planes,
&svga_hw_vdecl,
&svga_hw_fs_constants,
&svga_hw_vs_constants,
NULL
};
static const struct svga_tracked_state *swtnl_draw_state[] =
{
&svga_update_swtnl_draw,
&svga_update_swtnl_vdecl,
NULL
};
/* Flattens the graph of state dependencies. Could swap the positions
* of hw_clear_state and need_swtnl_state without breaking anything.
*/
static const struct svga_tracked_state **state_levels[] =
{
need_swtnl_state,
hw_clear_state,
hw_draw_state,
swtnl_draw_state
};
static unsigned check_state( unsigned a,
unsigned b )
{
return (a & b);
}
static void accumulate_state( unsigned *a,
unsigned b )
{
*a |= b;
}
static void xor_states( unsigned *result,
unsigned a,
unsigned b )
{
*result = a ^ b;
}
static enum pipe_error
update_state(struct svga_context *svga,
const struct svga_tracked_state *atoms[],
unsigned *state)
{
boolean debug = TRUE;
enum pipe_error ret = PIPE_OK;
unsigned i;
ret = svga_hwtnl_flush( svga->hwtnl );
if (ret != PIPE_OK)
return ret;
if (debug) {
/* Debug version which enforces various sanity checks on the
* state flags which are generated and checked to help ensure
* state atoms are ordered correctly in the list.
*/
unsigned examined, prev;
examined = 0;
prev = *state;
for (i = 0; atoms[i] != NULL; i++) {
unsigned generated;
if (check_state(*state, atoms[i]->dirty)) {
if (0)
debug_printf("update: %s\n", atoms[i]->name);
ret = atoms[i]->update( svga, *state );
if (ret != PIPE_OK)
return ret;
}
/* generated = (prev ^ state)
* if (examined & generated)
* fail;
*/
xor_states(&generated, prev, *state);
if (check_state(examined, generated)) {
debug_printf("state atom %s generated state already examined\n",
atoms[i]->name);
}
prev = *state;
accumulate_state(&examined, atoms[i]->dirty);
}
}
else {
for (i = 0; atoms[i] != NULL; i++) {
if (check_state(*state, atoms[i]->dirty)) {
ret = atoms[i]->update( svga, *state );
if (ret != PIPE_OK)
return ret;
}
}
}
return PIPE_OK;
}
enum pipe_error
svga_update_state(struct svga_context *svga, unsigned max_level)
{
struct svga_screen *screen = svga_screen(svga->pipe.screen);
enum pipe_error ret = PIPE_OK;
unsigned i;
/* Check for updates to bound textures. This can't be done in an
* atom as there is no flag which could provoke this test, and we
* cannot create one.
*/
if (svga->state.texture_timestamp != screen->texture_timestamp) {
svga->state.texture_timestamp = screen->texture_timestamp;
svga->dirty |= SVGA_NEW_TEXTURE;
}
for (i = 0; i <= max_level; i++) {
svga->dirty |= svga->state.dirty[i];
if (svga->dirty) {
ret = update_state( svga,
state_levels[i],
&svga->dirty );
if (ret != PIPE_OK)
return ret;
svga->state.dirty[i] = 0;
}
}
for (; i < SVGA_STATE_MAX; i++)
svga->state.dirty[i] |= svga->dirty;
svga->dirty = 0;
return PIPE_OK;
}
void svga_update_state_retry( struct svga_context *svga,
unsigned max_level )
{
enum pipe_error ret;
ret = svga_update_state( svga, max_level );
if (ret == PIPE_ERROR_OUT_OF_MEMORY) {
svga_context_flush(svga, NULL);
ret = svga_update_state( svga, max_level );
}
}
#define EMIT_RS(_rs, _count, _name, _value) \
do { \
_rs[_count].state = _name; \
_rs[_count].uintValue = _value; \
_count++; \
} while (0)
/* Setup any hardware state which will be constant through the life of
* a context.
*/
enum pipe_error svga_emit_initial_state( struct svga_context *svga )
{
SVGA3dRenderState *rs;
unsigned count = 0;
const unsigned COUNT = 2;
enum pipe_error ret;
ret = SVGA3D_BeginSetRenderState( svga->swc, &rs, COUNT );
if (ret != PIPE_OK)
return ret;
/* Always use D3D style coordinate space as this is the only one
* which is implemented on all backends.
*/
EMIT_RS(rs, count, SVGA3D_RS_COORDINATETYPE, SVGA3D_COORDINATE_LEFTHANDED );
EMIT_RS(rs, count, SVGA3D_RS_FRONTWINDING, SVGA3D_FRONTWINDING_CW );
SVGA_FIFOCommitAll( svga->swc );
return PIPE_OK;
}