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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 "pipe/p_util.h"
#include "draw/draw_context.h"
#include "draw/draw_private.h"
#include "draw/draw_pt.h"
/* XXX: Shouldn't those two functions below use the '>' operator???
*/
static boolean too_many_verts( struct draw_context *draw,
unsigned verts )
{
return verts < 1024;
}
static boolean too_many_elts( struct draw_context *draw,
unsigned elts )
{
return elts < (16 * 1024);
}
boolean
draw_pt_arrays(struct draw_context *draw,
unsigned prim,
unsigned start,
unsigned count)
{
const boolean pipeline = draw_need_pipeline(draw, prim);
const boolean cliptest = !draw->rasterizer->bypass_clipping;
const boolean shading = !draw->rasterizer->bypass_vs;
struct draw_pt_front_end *frontend = NULL;
struct draw_pt_middle_end *middle = NULL;
/* Overall we do:
* - 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.
*/
if (!cliptest && !pipeline && !shading) {
/* This is the 'passthrough' path:
*/
/* Fetch user verts, emit hw verts:
*/
middle = draw->pt.middle.fetch_emit;
}
else if (!cliptest && !shading) {
/* This is the 'passthrough' path targetting the pipeline backend.
*/
/* Fetch user verts, emit pipeline verts, run pipeline:
*/
middle = draw->pt.middle.fetch_pipeline;
}
#if 0
else if (!cliptest && !pipeline) {
/* Fetch user verts, run vertex shader, emit hw verts:
*/
middle = draw->pt.middle.fetch_shade_emit;
}
else if (!pipeline) {
/* Even though !pipeline, we have to run it to get clipping. We
* do know that the pipeline is just the clipping operation, but
* that probably doesn't help much.
*
* This is going to be the most important path for a lot of
* swtnl cards.
*/
/* Fetch user verts,
* run vertex shader,
* cliptest and viewport trasform
* if no clipped vertices,
* emit hw verts
* else
* run pipline
*/
middle = draw->pt.middle.fetch_shade_cliptest_pipeline_or_emit;
}
else if (!cliptest) {
/* Fetch user verts, run vertex shader, run pipeline:
*/
middle = draw->pt.middle.fetch_shade_pipeline;
}
else {
/* This is what we're currently always doing:
*/
/* Fetch user verts, run vertex shader, cliptest, run pipeline:
*/
middle = draw->pt.middle.fetch_shade_cliptest_pipeline;
}
#else
else {
return FALSE;
}
#endif
/* If !pipeline, need to make sure we respect the driver's limited
* capabilites to receive blocks of vertex data and elements.
*/
#if 0
if (!pipeline) {
unsigned vertex_mode = passthrough;
unsigned nr_verts = count_vertices( draw, start, count );
unsigned hw_prim = prim;
if (is_elts(draw)) {
frontend = draw->pt.front.vcache;
hw_prim = reduced_prim(prim);
}
if (too_many_verts(nr_verts)) {
/* if (is_verts(draw) && can_split(prim)) {
draw = draw_arrays_split;
}
else */ {
frontend = draw->pt.front.vcache;
hw_prim = reduced_prim(prim);
}
}
if (too_many_elts(count)) {
/* if (is_elts(draw) && can_split(prim)) {
draw = draw_elts_split;
}
else */ {
frontend = draw->pt.front.vcache;
hw_prim = reduced_prim(prim);
}
}
if (!good_prim(hw_prim)) {
draw = draw->pt.front.vcache;
}
}
#else
frontend = draw->pt.front.vcache;
#endif
/* XXX: need to flush to get prim_vbuf.c to release its allocation??
*/
draw_do_flush( draw, DRAW_FLUSH_BACKEND );
frontend->prepare( frontend, prim, middle );
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.middle.fetch_emit = draw_pt_fetch_emit( draw );
if (!draw->pt.middle.fetch_emit)
return FALSE;
draw->pt.middle.fetch_pipeline = draw_pt_fetch_pipeline( draw );
if (!draw->pt.middle.fetch_pipeline)
return FALSE;
draw->pt.front.vcache = draw_pt_vcache( draw );
if (!draw->pt.front.vcache)
return FALSE;
return TRUE;
}
void draw_pt_destroy( struct draw_context *draw )
{
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_pipeline) {
draw->pt.middle.fetch_pipeline->destroy( draw->pt.middle.fetch_pipeline );
draw->pt.middle.fetch_pipeline = NULL;
}
if (draw->pt.front.vcache) {
draw->pt.front.vcache->destroy( draw->pt.front.vcache );
draw->pt.front.vcache = NULL;
}
}
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