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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.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
*/
#include "draw/draw_context.h"
#include "draw/draw_private.h"
#include "draw/draw_pt.h"
static unsigned trim( unsigned count, unsigned first, unsigned incr )
{
if (count < first)
return 0;
return count - (count - first) % incr;
}
/* Overall we split things into:
* - frontend -- prepare fetch_elts, draw_elts - eg vcache
* - middle -- fetch, shade, cliptest, viewport
* - pipeline -- the prim pipeline: clipping, wide lines, etc
* - backend -- the vbuf_render provided by the driver.
*/
static boolean
draw_pt_arrays(struct draw_context *draw,
unsigned prim,
unsigned start,
unsigned count)
{
struct draw_pt_front_end *frontend = NULL;
struct draw_pt_middle_end *middle = NULL;
unsigned opt = 0;
/* Sanitize primitive length:
*/
{
unsigned first, incr;
draw_pt_split_prim(prim, &first, &incr);
count = trim(count, first, incr);
if (count < first)
return TRUE;
}
if (!draw->render) {
opt |= PT_PIPELINE;
}
if (draw_need_pipeline(draw,
draw->rasterizer,
prim)) {
opt |= PT_PIPELINE;
}
if (!draw->bypass_clipping && !draw->pt.test_fse) {
opt |= PT_CLIPTEST;
}
if (!draw->rasterizer->bypass_vs) {
opt |= PT_SHADE;
}
if (opt == 0)
middle = draw->pt.middle.fetch_emit;
else if (opt == PT_SHADE && !draw->pt.no_fse)
middle = draw->pt.middle.fetch_shade_emit;
else
middle = draw->pt.middle.general;
/* Pick the right frontend
*/
if (draw->pt.user.elts || (opt & PT_PIPELINE)) {
frontend = draw->pt.front.vcache;
} else {
frontend = draw->pt.front.varray;
}
frontend->prepare( frontend, prim, middle, opt );
frontend->run(frontend,
draw_pt_elt_func(draw),
draw_pt_elt_ptr(draw, start),
count);
frontend->finish( frontend );
return TRUE;
}
boolean draw_pt_init( struct draw_context *draw )
{
draw->pt.test_fse = debug_get_bool_option("DRAW_FSE", FALSE);
draw->pt.no_fse = debug_get_bool_option("DRAW_NO_FSE", FALSE);
draw->pt.front.vcache = draw_pt_vcache( draw );
if (!draw->pt.front.vcache)
return FALSE;
draw->pt.front.varray = draw_pt_varray(draw);
if (!draw->pt.front.varray)
return FALSE;
draw->pt.middle.fetch_emit = draw_pt_fetch_emit( draw );
if (!draw->pt.middle.fetch_emit)
return FALSE;
draw->pt.middle.fetch_shade_emit = draw_pt_middle_fse( draw );
if (!draw->pt.middle.fetch_shade_emit)
return FALSE;
draw->pt.middle.general = draw_pt_fetch_pipeline_or_emit( draw );
if (!draw->pt.middle.general)
return FALSE;
return TRUE;
}
void draw_pt_destroy( struct draw_context *draw )
{
if (draw->pt.middle.general) {
draw->pt.middle.general->destroy( draw->pt.middle.general );
draw->pt.middle.general = NULL;
}
if (draw->pt.middle.fetch_emit) {
draw->pt.middle.fetch_emit->destroy( draw->pt.middle.fetch_emit );
draw->pt.middle.fetch_emit = NULL;
}
if (draw->pt.middle.fetch_shade_emit) {
draw->pt.middle.fetch_shade_emit->destroy( draw->pt.middle.fetch_shade_emit );
draw->pt.middle.fetch_shade_emit = NULL;
}
if (draw->pt.front.vcache) {
draw->pt.front.vcache->destroy( draw->pt.front.vcache );
draw->pt.front.vcache = NULL;
}
if (draw->pt.front.varray) {
draw->pt.front.varray->destroy( draw->pt.front.varray );
draw->pt.front.varray = NULL;
}
}
/**
* Draw vertex arrays
* This is the main entrypoint into the drawing module.
* \param prim one of PIPE_PRIM_x
* \param start index of first vertex to draw
* \param count number of vertices to draw
*/
void
draw_arrays(struct draw_context *draw, unsigned prim,
unsigned start, unsigned count)
{
unsigned reduced_prim = draw_pt_reduced_prim(prim);
if (reduced_prim != draw->reduced_prim) {
draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
draw->reduced_prim = reduced_prim;
}
/* drawing done here: */
draw_pt_arrays(draw, prim, start, count);
}
boolean draw_pt_get_edgeflag( struct draw_context *draw,
unsigned idx )
{
if (draw->pt.user.edgeflag)
return (draw->pt.user.edgeflag[idx/32] & (1 << (idx%32))) != 0;
else
return 1;
}
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