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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.
*
**************************************************************************/
#include "pipe/p_defines.h"
#include "util/u_memory.h"
#include "lp_context.h"
#include "lp_state.h"
#include "lp_setup.h"
#include "draw/draw_context.h"
struct lp_rast_state {
struct pipe_rasterizer_state lp_state;
struct pipe_rasterizer_state draw_state;
};
/* State which might be handled in either the draw module or locally.
* This function is used to turn that state off in one of the two
* places.
*/
static void
clear_flags(struct pipe_rasterizer_state *rast)
{
rast->light_twoside = 0;
rast->offset_tri = 0;
rast->offset_line = 0;
rast->offset_point = 0;
rast->offset_units = 0.0f;
rast->offset_scale = 0.0f;
}
static void *
llvmpipe_create_rasterizer_state(struct pipe_context *pipe,
const struct pipe_rasterizer_state *rast)
{
boolean need_pipeline;
/* Partition rasterizer state into what we want the draw module to
* handle, and what we'll look after ourselves.
*/
struct lp_rast_state *state = MALLOC_STRUCT(lp_rast_state);
if (state == NULL)
return NULL;
memcpy(&state->draw_state, rast, sizeof *rast);
memcpy(&state->lp_state, rast, sizeof *rast);
/* We rely on draw module to do unfilled polyons, AA lines and
* points and stipple.
*
* Over time, reduce this list of conditions, and expand the list
* of flags which get cleared in clear_flags().
*/
need_pipeline = (rast->fill_front != PIPE_POLYGON_MODE_FILL ||
rast->fill_back != PIPE_POLYGON_MODE_FILL ||
rast->offset_point ||
rast->offset_line ||
rast->point_smooth ||
rast->line_smooth ||
rast->line_stipple_enable ||
rast->poly_stipple_enable);
/* If not using the pipeline, clear out the flags which we can
* handle ourselves. If we *are* using the pipeline, do everything
* on the pipeline and clear those flags on our internal copy of
* the state.
*/
if (need_pipeline)
clear_flags(&state->lp_state);
else
clear_flags(&state->draw_state);
return state;
}
static void
llvmpipe_bind_rasterizer_state(struct pipe_context *pipe, void *handle)
{
struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
const struct lp_rast_state *state =
(const struct lp_rast_state *) handle;
if (state) {
llvmpipe->rasterizer = &state->lp_state;
draw_set_rasterizer_state(llvmpipe->draw, &state->draw_state, handle);
/* XXX: just pass lp_state directly to setup.
*/
lp_setup_set_triangle_state( llvmpipe->setup,
state->lp_state.cull_face,
state->lp_state.front_ccw,
state->lp_state.scissor,
state->lp_state.gl_rasterization_rules);
lp_setup_set_flatshade_first( llvmpipe->setup,
state->lp_state.flatshade_first);
lp_setup_set_rasterizer_discard( llvmpipe->setup,
state->lp_state.rasterizer_discard);
lp_setup_set_line_state( llvmpipe->setup,
state->lp_state.line_width);
lp_setup_set_point_state( llvmpipe->setup,
state->lp_state.point_size,
state->lp_state.point_size_per_vertex,
state->lp_state.sprite_coord_enable,
state->lp_state.sprite_coord_mode);
}
else {
llvmpipe->rasterizer = NULL;
draw_set_rasterizer_state(llvmpipe->draw, NULL, handle);
}
llvmpipe->dirty |= LP_NEW_RASTERIZER;
}
static void
llvmpipe_delete_rasterizer_state(struct pipe_context *pipe,
void *rasterizer)
{
FREE( rasterizer );
}
void
llvmpipe_init_rasterizer_funcs(struct llvmpipe_context *llvmpipe)
{
llvmpipe->pipe.create_rasterizer_state = llvmpipe_create_rasterizer_state;
llvmpipe->pipe.bind_rasterizer_state = llvmpipe_bind_rasterizer_state;
llvmpipe->pipe.delete_rasterizer_state = llvmpipe_delete_rasterizer_state;
}
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