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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
/**
* \brief A draw stage that drives our triangle setup routines from
* within the draw pipeline. One of two ways to drive setup, the
* other being in lp_prim_vbuf.c.
*
* \author Keith Whitwell <keith@tungstengraphics.com>
* \author Brian Paul
*/
#include "lp_context.h"
#include "lp_setup.h"
#include "lp_state.h"
#include "lp_prim_setup.h"
#include "draw/draw_pipe.h"
#include "draw/draw_vertex.h"
#include "util/u_memory.h"
/**
* Triangle setup info (derived from draw_stage).
* Also used for line drawing (taking some liberties).
*/
struct setup_stage {
struct draw_stage stage; /**< This must be first (base class) */
struct setup_context *setup;
};
/**
* Basically a cast wrapper.
*/
static INLINE struct setup_stage *setup_stage( struct draw_stage *stage )
{
return (struct setup_stage *)stage;
}
typedef const float (*cptrf4)[4];
static void
do_tri(struct draw_stage *stage, struct prim_header *prim)
{
struct setup_stage *setup = setup_stage( stage );
llvmpipe_setup_tri( setup->setup,
(cptrf4)prim->v[0]->data,
(cptrf4)prim->v[1]->data,
(cptrf4)prim->v[2]->data );
}
static void
do_line(struct draw_stage *stage, struct prim_header *prim)
{
struct setup_stage *setup = setup_stage( stage );
llvmpipe_setup_line( setup->setup,
(cptrf4)prim->v[0]->data,
(cptrf4)prim->v[1]->data );
}
static void
do_point(struct draw_stage *stage, struct prim_header *prim)
{
struct setup_stage *setup = setup_stage( stage );
llvmpipe_setup_point( setup->setup,
(cptrf4)prim->v[0]->data );
}
static void setup_begin( struct draw_stage *stage )
{
struct setup_stage *setup = setup_stage(stage);
llvmpipe_setup_prepare( setup->setup );
stage->point = do_point;
stage->line = do_line;
stage->tri = do_tri;
}
static void setup_first_point( struct draw_stage *stage,
struct prim_header *header )
{
setup_begin(stage);
stage->point( stage, header );
}
static void setup_first_line( struct draw_stage *stage,
struct prim_header *header )
{
setup_begin(stage);
stage->line( stage, header );
}
static void setup_first_tri( struct draw_stage *stage,
struct prim_header *header )
{
setup_begin(stage);
stage->tri( stage, header );
}
static void setup_flush( struct draw_stage *stage,
unsigned flags )
{
stage->point = setup_first_point;
stage->line = setup_first_line;
stage->tri = setup_first_tri;
}
static void reset_stipple_counter( struct draw_stage *stage )
{
}
static void render_destroy( struct draw_stage *stage )
{
struct setup_stage *ssetup = setup_stage(stage);
llvmpipe_setup_destroy_context(ssetup->setup);
FREE( stage );
}
/**
* Create a new primitive setup/render stage.
*/
struct draw_stage *lp_draw_render_stage( struct llvmpipe_context *llvmpipe )
{
struct setup_stage *sstage = CALLOC_STRUCT(setup_stage);
sstage->setup = llvmpipe_setup_create_context(llvmpipe);
sstage->stage.draw = llvmpipe->draw;
sstage->stage.point = setup_first_point;
sstage->stage.line = setup_first_line;
sstage->stage.tri = setup_first_tri;
sstage->stage.flush = setup_flush;
sstage->stage.reset_stipple_counter = reset_stipple_counter;
sstage->stage.destroy = render_destroy;
return (struct draw_stage *)sstage;
}
struct setup_context *
lp_draw_setup_context( struct draw_stage *stage )
{
struct setup_stage *ssetup = setup_stage(stage);
return ssetup->setup;
}
void
lp_draw_flush( struct draw_stage *stage )
{
stage->flush( stage, 0 );
}
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